Against the backdrop of the high-quality development of vocational education,the construction of“double-qualified”teacher teams has shifted from focusing on quantity growth to emphasizing the improvement of“double-...Against the backdrop of the high-quality development of vocational education,the construction of“double-qualified”teacher teams has shifted from focusing on quantity growth to emphasizing the improvement of“double-qualified”competencies.How to strengthen the quality-oriented construction of“double-qualified”teacher teams,give full play to the role of“double-qualified”teachers,promote the construction and teaching reform of tourism majors,and enhance the quality of tourism talent cultivation have become key issues faced by higher vocational tourism majors.Taking higher vocational tourism majors as an example,this paper analyzes the problems encountered in the construction of tourism-related“double-qualified”teacher teams,puts forward strategies for such construction,and explores the impact of building“double-qualified”teacher teams on the quality of talent cultivation in tourism majors.It aims to provide references for the coordinated improvement of the construction of“double-qualified”teacher teams and the quality of talent cultivation in higher vocational tourism majors.展开更多
With the mine exploitation depth getting deeper and deeper, the mine heat-harm turns into another natural disaster after the five disasters, which are the roof, the gas, the fire, the dust and the flood disaster. Comp...With the mine exploitation depth getting deeper and deeper, the mine heat-harm turns into another natural disaster after the five disasters, which are the roof, the gas, the fire, the dust and the flood disaster. Compared with other researches on prevention and cure against the heat-harm, the research on prevention and cure against the heat-harm in constructing mine are less. Referring to the experience of prevention and cure against the heat-harm home and 'abroad, analyzing the characteristic of cooling in the constructing mine, and based on the ground former freezing equipments and the modified mine temporary cooling equipments, the paper proposed four technical projects. By comparing with the four technical projects, the second project is preponderant both in technology and economy and can solve the heat-harm of the constructing mine, which is proved by the forecast and calculation. The project can be widely applied in de-temperature tasks of high temperature and heat-harm mines during the mine constructing period and in the exploiting preparing phase.展开更多
Yunnan is one of the most typical mountalnous provinces in western Chi-na. For the geographical features of mountalnous areas accounting for most parts and fIatIand areas accounting for smal parts, the contradiction b...Yunnan is one of the most typical mountalnous provinces in western Chi-na. For the geographical features of mountalnous areas accounting for most parts and fIatIand areas accounting for smal parts, the contradiction between farmIand protection and construction guarantee is very prominent. In the first half of 2011, Yunnan Province estabIished creativeIy the strategy of "protecting farmIand in fIat-Iand areas and constructing mountalnous cities" (hereinafter referred to as the strat-egy of "constructing mountalnous cities"), which was almed at protecting effectiveIy the Iimited and high quality arabIe Iand resources in fIatIand area and providing new construction area for new type of urbanization and industrialization, so as to achieve win-win situation between arabIe Iand protection and urbanization deveIopment. Im-pIementing this strategy in Yunnan Province is feasibIe, malnIy in the Iarge deveIop-ment potentials in the gentIe gradient between 8° to 25°. The gentIe sIope area be-tween 8° to 25° occupies 51% of the total Iand area in Yunnan Province, which is almost 140 times of the area of urban construction Iand in Yunnan in 2009. The surrounding areas of fIatIand or maln town in most counties (cities, regions) dis-tribute with different sizes of Iow hiI s and gentIe sIopes, thus mountalnous construc-tion Iand reserves are abundant, which benefits for impeI ing the strategy of "con-structing mountalnous cities" in the Iight of Iocal conditions.展开更多
This paper explores the construction of the“Community Social Work”curriculum in the context of China’s socio-political and cultural environment.Rooted in the principles of socialist community governance and applica...This paper explores the construction of the“Community Social Work”curriculum in the context of China’s socio-political and cultural environment.Rooted in the principles of socialist community governance and application-oriented education.This course responds to the growing national emphasis on grassroots social services and community capacity building.Drawing from a decade of iterative reforms and field collaborations,the course integrates project-based learning,school-agency cooperation,and ideological-political education.This model aligns higher education with local development needs and provides a replicable framework for professional training in social work.The paper also discusses the impact on students and communities,with data illustrating the course’s effectiveness.展开更多
In this study, we reported the repaid construction of a molecular marker linkage map of rice (Oryza sativa L.). An F-2 population from the cross between Annong S-1 and Nanjing 11 was used to construct a genetic linkag...In this study, we reported the repaid construction of a molecular marker linkage map of rice (Oryza sativa L.). An F-2 population from the cross between Annong S-1 and Nanjing 11 was used to construct a genetic linkage map of rice. Total of 142 newly screened AFLP markers and 30 anchor markers (25 SSR markers and 5 RFLP markers) were mapped on the 12 chromosomes covering 1537.4 cM of rice genome. The average interval between these markers was 9.0 cM. The total work which usually was finished in more than one year was finished within only 3 months by one person. This is the first plant AFLP map developed in China. A new thermosensitive genic male sterile gene in rice, tms5, was Egged and mapped onto chromosome 2 during the development of the linkage map.展开更多
A new method for constructing digital-strain-field-image from a moire pattern with the help of digital image processing technique is proposed in this paper. The digital-strain-field-image expresses the strain values d...A new method for constructing digital-strain-field-image from a moire pattern with the help of digital image processing technique is proposed in this paper. The digital-strain-field-image expresses the strain values directly by its grey levels. The digital-strain-field-image can be obtained by making a differentiation for the digital moire pattern and doing a simple division operation. This image not only gives the visual strain field distribution, but also gives the strain values of every point. This method is simple and applicable and has satisfactory accuracy.展开更多
In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes a...In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes and transforms land use pattern. However, social and economic development performs unevenly in Yun- nan, supplemented by varied geographical conditions, so that constructing mountain- ous cities should proceed as per local conditions. The research proposed the con- trol of constructing mountainous cities provided crop safety under the principle of farmland protection and measured the quantities of demanded construction lands ac- cording to science of population prediction and ekistics, based on which the control scales of constructing mountainous cities were determined by multiplying basic farm- land coefficient and the area of newly increased construction lands. The research is of significance for guiding the construction of mountainous cities and avoiding the occupation of construction lands on farmlands.展开更多
Objective To explore the further mechanism of immune tolerance induced by injecting dendritic cells transfected with Fasl gene in rat liver transplantation. Methods Orthotopic liver transplantation models in 36 Wistar...Objective To explore the further mechanism of immune tolerance induced by injecting dendritic cells transfected with Fasl gene in rat liver transplantation. Methods Orthotopic liver transplantation models in 36 Wistar rats receiving SD liver as donors were established by using" the two-cuff technique" with some modifications. The rats were randomly divided into 3 groups: CsA-treated group (n = 12) treated with cyclosporine; mdrl-treated group( n = 12) treated with dendritic cells transfected with mdrl gene and FasL group (n - 12) treated with the dendritic cells transfected with FasL gene by intraperitoneal injection. 12 normal Wistar rats served as control group. Four rats in each group were killed on the postoperative day (POD) 7 respectively. The liver and peripheral blood were obtained to determine liver function, mRNA expression of Fas, FasL, IL-2 in the grafts by semi-quantitative RT-PCR. Results It was found that the rats in the control group all died between 9-15 days after operation, and the展开更多
The theory of quantum error correcting codes is a primary tool for fighting decoherence and other quantum noise in quantum communication and quantum computation. Recently, the theory of quantum error correcting codes ...The theory of quantum error correcting codes is a primary tool for fighting decoherence and other quantum noise in quantum communication and quantum computation. Recently, the theory of quantum error correcting codes has developed rapidly and been extended to protect quantum information over asymmetric quantum channels, in which phase-shift and qubit-flip errors occur with different probabilities. In this paper, we generalize the construction of symmetric quantum codes via graphs (or matrices) to the asymmetric case, converting the construction of asymmetric quantum codes to finding matrices with some special properties. We also propose some asymmetric quantum Maximal Distance Separable (MDS) codes as examples constructed in this way.展开更多
According to the particularity of towns' construction in the southwestern mountainous areas of Yunnan Province, this study has built constructive land suit- ability evaluation index system which is different to flat ...According to the particularity of towns' construction in the southwestern mountainous areas of Yunnan Province, this study has built constructive land suit- ability evaluation index system which is different to flat area. Then this study deter- mined single evaluation factors index and comprehensive suitability index using "ex- treme conditions method" and "suitability index method", and analyzed and assessed the constructive land suitability on each evaluation unit polygons and its suitability level by using GIS software. Taking Lianghe County of Dehong Dai-Jingpo Au- tonomous Prefecture as an example to evaluate land suitability in Lianghe County's main towns around the gentle slope, the results show, in the evaluation area, the area of land suitable for construction and unsuitable for construction respectively ac- count 73.58% and 26.42%. And first-class, second and third-class of land suitable for construction should be composited at the ratio of about 11:49:40. The suitability evaluation index system and method developed in this paper is applicable for evalu- ating the construction land suitability in mountainous areas of southwest Yunnan Province, and will provide theoretical and technical support for land policy measures which strengthen the protection of farmland and promote the scientific development of urbanization in Yunnan Province and even similar mountainous areas of the whole China.展开更多
Coal occupies a dominant position in China's national economy and is an essential energy source for future industrial development. To inform the efficient and sustainable development of the coal industry, this paper ...Coal occupies a dominant position in China's national economy and is an essential energy source for future industrial development. To inform the efficient and sustainable development of the coal industry, this paper analyzes the sources of strategic risk for coal science and technology enterprises using 3 first-class indicators, 10 second-level indicators, and 37 observation points established through the existing research literature and experience. Moreover, in accordance to the obtained initial index data, the selected indicators have been tested and screened using reliability and membership degree analyses to remove redundant variables, avoid juxtaposition of risk factors at different levels, and reduce the influ- ence of some tiny risk factors for enterprise strategic risk. Then, factor analysis of external environment factor sub-scale was carried out. Factors are extracted according to a standard characteristic value greater than 1. Variables with high coefficients are classified into one factor category; and finally, 3 first-class indicators. 8 second-level indicators, and 37 observation noints are reconstructed.展开更多
As one of the oldest human civilizations,the Chinese nation once created brilliant ancient and classical culture.However,in transition to modernity,as China became a late comer of modernization,the Chinese nation has ...As one of the oldest human civilizations,the Chinese nation once created brilliant ancient and classical culture.However,in transition to modernity,as China became a late comer of modernization,the Chinese nation has chosen the Party as the leading force in constructing its modern culture.Guided by Marxism,the Communist Party of China(CPC)has advanced展开更多
College and university safe campus construction for the purpose of building a safe,harmonious and orderly educational environment is unified with ideological and political education whose fundamental purpose is to imp...College and university safe campus construction for the purpose of building a safe,harmonious and orderly educational environment is unified with ideological and political education whose fundamental purpose is to improve people’s ideological and moral quality and to promote people’s free and all-round development.Therefore,from the perspective of ideological and political education,safe campus construction as a system must adhere to the people-oriented principle so as to establish a long-term mechanism of a combination of ideological education and prevention through management,security and comprehensive management,hardware facilities and software environment optimization,and traditional means and modern technology.展开更多
In order to study the constructing technology of virtual production line, the structure model of virtual production line was presented, and the object oriented technique was used to establish its basic classes and rel...In order to study the constructing technology of virtual production line, the structure model of virtual production line was presented, and the object oriented technique was used to establish its basic classes and relevant models, including solid model, behavior model and object oriented Petri net based control model, and based on this, the constructing of virtual production line was realized. The application proved that the virtual production line had many good characteristics, such as visualization, interaction, multi layer and reusability, and it's an efficient tool of analyzing and modeling for layout planning and rapidly reconfiguring of production line.展开更多
The construction of the bridge across Taiwan Strait has been studied for a long time and the feasibility study that has attracted attention among scientists and engineers on both sides of the Taiwan Strait[1-4].The ke...The construction of the bridge across Taiwan Strait has been studied for a long time and the feasibility study that has attracted attention among scientists and engineers on both sides of the Taiwan Strait[1-4].The key question is whether this bridge and dike-road across Taiwan Strait can be constructed with present technology under such complex geological conditions or not.The results of current researches indicate that the sea floor of the Strait is covered with a horizontal layer composed of both the Pleistocene and the Holocene sandstone and shale with a thickness of about 200~300m.The distance from Pingtan island to China's Xinzhu seashore is 124 km,which might be connected by 4-6 section bridges and 5-7 section of dike-roads,and serve as a best program of the route in the north Strait section.The NE offshore fault along the Fujian coast and that along the west coast of Taiwan,China are the major tectonic lines separated by several NW faults under the upper horizontal layer,these fault 3D feature may be detecting by geo-tomography technique,which can help to deal with the foundation of bridge and dike-road piers.It is judged that the construction of bridge and dike-road beginning from Pingtan to the China's Xinzhu seashore is worth recommendation.In the procedure of the construction of large and high height bridges,must consider the steel structural member be detected by industrial CT technology,and might detect the pier of bridge and dike-road which built by steel tube and reinforced concrete at dike-roads two side,in order to get the hard basement and getting the depth of the pier extend below the sea-floor by the seismic tomographic detection method.展开更多
It is proved that among the regular polygons with prime edges, only the regular polygons with Fermat prime edges are constructable with compass and straightedge. As 17 is a Fermat prime number, the construction of hep...It is proved that among the regular polygons with prime edges, only the regular polygons with Fermat prime edges are constructable with compass and straightedge. As 17 is a Fermat prime number, the construction of heptadecagon has been discussing all the time. Many different construction methods are proposed although they are based on the same theory. Simplification of the construction is still a sensible problem. Here, we propose a simple method for constructing regular heptadecagon with the fewest steps. The accumulation of construction errors is also avoided. This method is more applicable than the previous construction.展开更多
Aircraft collaboration design is based on a unified set of schemas containing data and model representations and interfaces across disciplines.The aircraft design schema is a central data model that specifies the para...Aircraft collaboration design is based on a unified set of schemas containing data and model representations and interfaces across disciplines.The aircraft design schema is a central data model that specifies the paradigm for the representation of a full lifecycle model of aircraft design.The construction of the schema currently lacks theoretical guidance.This paper designs a novel methodology to construct the aircraft design schema,a fully functional,logical,and selfconsistent methodology.The methodology defines a schema matrix that includes implementation strategies,principles,processes,meta-object facility,views,scenarios,and products.The aircraft conceptual design schema is constructed according to the methodology,which is a hands-on approach to help understand the concept and implementation.The features of the methodology are analyzed,and the methodology and the aircraft conceptual design schema are presented to address the pain points of multiple solution trade-offs,multiple iterations,and multidisciplinary coupling in aircraft conceptual collaboration design.展开更多
On November 25,the 12th China Overseas Investment Fair(COIF)was held by the China Overseas Development Association in Beijing.Officials and representative from embassies or offices in China from 85 different countries...On November 25,the 12th China Overseas Investment Fair(COIF)was held by the China Overseas Development Association in Beijing.Officials and representative from embassies or offices in China from 85 different countries,including the ambassadors from 31 countries,attended this year’s event.The COIF was held with the theme entitled“Concentrating on the post-pandemic era and constructing a new development paradigm”,and focused on how to build platforms and create business opportunities to lift the world economy out of recession.展开更多
In typical Wi-Fi based indoor positioning systems employing fingerprint model,plentiful fingerprints need to be trained by trained experts or technician,which extends labor costs and restricts their promotion.In this ...In typical Wi-Fi based indoor positioning systems employing fingerprint model,plentiful fingerprints need to be trained by trained experts or technician,which extends labor costs and restricts their promotion.In this paper,a novel approach based on crowd paths to solve this problem is presented,which collects and constructs automatically fingerprints database for anonymous buildings through common crowd customers.However,the accuracy degradation problem may be introduced as crowd customers are not professional trained and equipped.Therefore,we define two concepts:fixed landmark and hint landmark,to rectify the fingerprint database in the practical system,in which common corridor crossing points serve as fixed landmark and cross point among different crowd paths serve as hint landmark.Machinelearning techniques are utilized for short range approximation around fixed landmarks and fuzzy logic decision technology is applied for searching hint landmarks in crowd traces space.Besides,the particle filter algorithm is also introduced to smooth the sample points in crowd paths.We implemented the approach on off-the-shelf smartphones and evaluate the performance.Experimental results indicate that the approach can availably construct WiFi fingerprint database without reduce the localization accuracy.展开更多
Fabricating homojunction photocatalyst is a promising approach to accelerate the separation and transfer of photogenerated charge carriers,and to boost photocatalytic performance.Herein,a novel poly(hep-tazine imide)(...Fabricating homojunction photocatalyst is a promising approach to accelerate the separation and transfer of photogenerated charge carriers,and to boost photocatalytic performance.Herein,a novel poly(hep-tazine imide)(PHI)-based S-scheme homojunction photocatalyst(U/T-LHPHI)is fabricated through an ionothermal synthesis route,which exhibits particular high and low crystallinity property,intimate in-terface combination,and locally N self-doping.The regulation of crystallinity contributes to the differen-tiated electronic structure in PHI,which leads to the establishment of internal electric field(IEF).The in-tense IEF and N doping level with electron extracting capacity synergistically promote the charge transfer from the high crystalline PHI(HPHI)to the low crystalline PHI(LPHI)following the S-scheme mecha-nism.Additionally,the strong interfacial interaction improves the interfacial charge transfer dynamics.As a consequence,photogenerated electrons with powerful reducing ability are maintained effectively.Upon light irradiation,the optimized U/T-LHPHI performs an H2 evolution rate of 4880,2416,and 2375μmol g−1 h−1 in deionized water,simulated seawater,and real seawater,respectively,which exceed that of many carefully designed noble metal Pt containing photocatalyst.This work provides an important verifi-cation that the rational design and construction of homojunction photocatalysts could effectively enhance photocatalytic activity.展开更多
摘要Against the backdrop of the high-quality development of vocational education,the construction of“double-qualified”teacher teams has shifted from focusing on quantity growth to emphasizing the improvement of“double-qualified”competencies.How to strengthen the quality-oriented construction of“double-qualified”teacher teams,give full play to the role of“double-qualified”teachers,promote the construction and teaching reform of tourism majors,and enhance the quality of tourism talent cultivation have become key issues faced by higher vocational tourism majors.Taking higher vocational tourism majors as an example,this paper analyzes the problems encountered in the construction of tourism-related“double-qualified”teacher teams,puts forward strategies for such construction,and explores the impact of building“double-qualified”teacher teams on the quality of talent cultivation in tourism majors.It aims to provide references for the coordinated improvement of the construction of“double-qualified”teacher teams and the quality of talent cultivation in higher vocational tourism majors.
摘要With the mine exploitation depth getting deeper and deeper, the mine heat-harm turns into another natural disaster after the five disasters, which are the roof, the gas, the fire, the dust and the flood disaster. Compared with other researches on prevention and cure against the heat-harm, the research on prevention and cure against the heat-harm in constructing mine are less. Referring to the experience of prevention and cure against the heat-harm home and 'abroad, analyzing the characteristic of cooling in the constructing mine, and based on the ground former freezing equipments and the modified mine temporary cooling equipments, the paper proposed four technical projects. By comparing with the four technical projects, the second project is preponderant both in technology and economy and can solve the heat-harm of the constructing mine, which is proved by the forecast and calculation. The project can be widely applied in de-temperature tasks of high temperature and heat-harm mines during the mine constructing period and in the exploiting preparing phase.
基金Supported by National Natural Science Foundation of China(41261018)~~
摘要Yunnan is one of the most typical mountalnous provinces in western Chi-na. For the geographical features of mountalnous areas accounting for most parts and fIatIand areas accounting for smal parts, the contradiction between farmIand protection and construction guarantee is very prominent. In the first half of 2011, Yunnan Province estabIished creativeIy the strategy of "protecting farmIand in fIat-Iand areas and constructing mountalnous cities" (hereinafter referred to as the strat-egy of "constructing mountalnous cities"), which was almed at protecting effectiveIy the Iimited and high quality arabIe Iand resources in fIatIand area and providing new construction area for new type of urbanization and industrialization, so as to achieve win-win situation between arabIe Iand protection and urbanization deveIopment. Im-pIementing this strategy in Yunnan Province is feasibIe, malnIy in the Iarge deveIop-ment potentials in the gentIe gradient between 8° to 25°. The gentIe sIope area be-tween 8° to 25° occupies 51% of the total Iand area in Yunnan Province, which is almost 140 times of the area of urban construction Iand in Yunnan in 2009. The surrounding areas of fIatIand or maln town in most counties (cities, regions) dis-tribute with different sizes of Iow hiI s and gentIe sIopes, thus mountalnous construc-tion Iand reserves are abundant, which benefits for impeI ing the strategy of "con-structing mountalnous cities" in the Iight of Iocal conditions.
摘要This paper explores the construction of the“Community Social Work”curriculum in the context of China’s socio-political and cultural environment.Rooted in the principles of socialist community governance and application-oriented education.This course responds to the growing national emphasis on grassroots social services and community capacity building.Drawing from a decade of iterative reforms and field collaborations,the course integrates project-based learning,school-agency cooperation,and ideological-political education.This model aligns higher education with local development needs and provides a replicable framework for professional training in social work.The paper also discusses the impact on students and communities,with data illustrating the course’s effectiveness.
摘要In this study, we reported the repaid construction of a molecular marker linkage map of rice (Oryza sativa L.). An F-2 population from the cross between Annong S-1 and Nanjing 11 was used to construct a genetic linkage map of rice. Total of 142 newly screened AFLP markers and 30 anchor markers (25 SSR markers and 5 RFLP markers) were mapped on the 12 chromosomes covering 1537.4 cM of rice genome. The average interval between these markers was 9.0 cM. The total work which usually was finished in more than one year was finished within only 3 months by one person. This is the first plant AFLP map developed in China. A new thermosensitive genic male sterile gene in rice, tms5, was Egged and mapped onto chromosome 2 during the development of the linkage map.
摘要A new method for constructing digital-strain-field-image from a moire pattern with the help of digital image processing technique is proposed in this paper. The digital-strain-field-image expresses the strain values directly by its grey levels. The digital-strain-field-image can be obtained by making a differentiation for the digital moire pattern and doing a simple division operation. This image not only gives the visual strain field distribution, but also gives the strain values of every point. This method is simple and applicable and has satisfactory accuracy.
基金Supported by National Natural Science Foundation of China(41261018)Scientific Research Foundation of Yunnan Education Committee(2015YUFEYC011)~~
摘要In 2011, Yunnan provincial committee and government proposed the strat- egy of constructing mountainous cities in order to protect farmlands and guarantee crop safety, which makes full use of hills and gentle-slopes and transforms land use pattern. However, social and economic development performs unevenly in Yun- nan, supplemented by varied geographical conditions, so that constructing mountain- ous cities should proceed as per local conditions. The research proposed the con- trol of constructing mountainous cities provided crop safety under the principle of farmland protection and measured the quantities of demanded construction lands ac- cording to science of population prediction and ekistics, based on which the control scales of constructing mountainous cities were determined by multiplying basic farm- land coefficient and the area of newly increased construction lands. The research is of significance for guiding the construction of mountainous cities and avoiding the occupation of construction lands on farmlands.
摘要Objective To explore the further mechanism of immune tolerance induced by injecting dendritic cells transfected with Fasl gene in rat liver transplantation. Methods Orthotopic liver transplantation models in 36 Wistar rats receiving SD liver as donors were established by using" the two-cuff technique" with some modifications. The rats were randomly divided into 3 groups: CsA-treated group (n = 12) treated with cyclosporine; mdrl-treated group( n = 12) treated with dendritic cells transfected with mdrl gene and FasL group (n - 12) treated with the dendritic cells transfected with FasL gene by intraperitoneal injection. 12 normal Wistar rats served as control group. Four rats in each group were killed on the postoperative day (POD) 7 respectively. The liver and peripheral blood were obtained to determine liver function, mRNA expression of Fas, FasL, IL-2 in the grafts by semi-quantitative RT-PCR. Results It was found that the rats in the control group all died between 9-15 days after operation, and the
基金supported by the National High Technology Research and Development Program of China under Grant No. 2011AA010803
摘要The theory of quantum error correcting codes is a primary tool for fighting decoherence and other quantum noise in quantum communication and quantum computation. Recently, the theory of quantum error correcting codes has developed rapidly and been extended to protect quantum information over asymmetric quantum channels, in which phase-shift and qubit-flip errors occur with different probabilities. In this paper, we generalize the construction of symmetric quantum codes via graphs (or matrices) to the asymmetric case, converting the construction of asymmetric quantum codes to finding matrices with some special properties. We also propose some asymmetric quantum Maximal Distance Separable (MDS) codes as examples constructed in this way.
基金Supported by National Natural Science Foundation of China(41261018)Lianghe Government Authorized Project~~
摘要According to the particularity of towns' construction in the southwestern mountainous areas of Yunnan Province, this study has built constructive land suit- ability evaluation index system which is different to flat area. Then this study deter- mined single evaluation factors index and comprehensive suitability index using "ex- treme conditions method" and "suitability index method", and analyzed and assessed the constructive land suitability on each evaluation unit polygons and its suitability level by using GIS software. Taking Lianghe County of Dehong Dai-Jingpo Au- tonomous Prefecture as an example to evaluate land suitability in Lianghe County's main towns around the gentle slope, the results show, in the evaluation area, the area of land suitable for construction and unsuitable for construction respectively ac- count 73.58% and 26.42%. And first-class, second and third-class of land suitable for construction should be composited at the ratio of about 11:49:40. The suitability evaluation index system and method developed in this paper is applicable for evalu- ating the construction land suitability in mountainous areas of southwest Yunnan Province, and will provide theoretical and technical support for land policy measures which strengthen the protection of farmland and promote the scientific development of urbanization in Yunnan Province and even similar mountainous areas of the whole China.
摘要Coal occupies a dominant position in China's national economy and is an essential energy source for future industrial development. To inform the efficient and sustainable development of the coal industry, this paper analyzes the sources of strategic risk for coal science and technology enterprises using 3 first-class indicators, 10 second-level indicators, and 37 observation points established through the existing research literature and experience. Moreover, in accordance to the obtained initial index data, the selected indicators have been tested and screened using reliability and membership degree analyses to remove redundant variables, avoid juxtaposition of risk factors at different levels, and reduce the influ- ence of some tiny risk factors for enterprise strategic risk. Then, factor analysis of external environment factor sub-scale was carried out. Factors are extracted according to a standard characteristic value greater than 1. Variables with high coefficients are classified into one factor category; and finally, 3 first-class indicators. 8 second-level indicators, and 37 observation noints are reconstructed.
摘要As one of the oldest human civilizations,the Chinese nation once created brilliant ancient and classical culture.However,in transition to modernity,as China became a late comer of modernization,the Chinese nation has chosen the Party as the leading force in constructing its modern culture.Guided by Marxism,the Communist Party of China(CPC)has advanced
摘要College and university safe campus construction for the purpose of building a safe,harmonious and orderly educational environment is unified with ideological and political education whose fundamental purpose is to improve people’s ideological and moral quality and to promote people’s free and all-round development.Therefore,from the perspective of ideological and political education,safe campus construction as a system must adhere to the people-oriented principle so as to establish a long-term mechanism of a combination of ideological education and prevention through management,security and comprehensive management,hardware facilities and software environment optimization,and traditional means and modern technology.
摘要In order to study the constructing technology of virtual production line, the structure model of virtual production line was presented, and the object oriented technique was used to establish its basic classes and relevant models, including solid model, behavior model and object oriented Petri net based control model, and based on this, the constructing of virtual production line was realized. The application proved that the virtual production line had many good characteristics, such as visualization, interaction, multi layer and reusability, and it's an efficient tool of analyzing and modeling for layout planning and rapidly reconfiguring of production line.
摘要The construction of the bridge across Taiwan Strait has been studied for a long time and the feasibility study that has attracted attention among scientists and engineers on both sides of the Taiwan Strait[1-4].The key question is whether this bridge and dike-road across Taiwan Strait can be constructed with present technology under such complex geological conditions or not.The results of current researches indicate that the sea floor of the Strait is covered with a horizontal layer composed of both the Pleistocene and the Holocene sandstone and shale with a thickness of about 200~300m.The distance from Pingtan island to China's Xinzhu seashore is 124 km,which might be connected by 4-6 section bridges and 5-7 section of dike-roads,and serve as a best program of the route in the north Strait section.The NE offshore fault along the Fujian coast and that along the west coast of Taiwan,China are the major tectonic lines separated by several NW faults under the upper horizontal layer,these fault 3D feature may be detecting by geo-tomography technique,which can help to deal with the foundation of bridge and dike-road piers.It is judged that the construction of bridge and dike-road beginning from Pingtan to the China's Xinzhu seashore is worth recommendation.In the procedure of the construction of large and high height bridges,must consider the steel structural member be detected by industrial CT technology,and might detect the pier of bridge and dike-road which built by steel tube and reinforced concrete at dike-roads two side,in order to get the hard basement and getting the depth of the pier extend below the sea-floor by the seismic tomographic detection method.
摘要It is proved that among the regular polygons with prime edges, only the regular polygons with Fermat prime edges are constructable with compass and straightedge. As 17 is a Fermat prime number, the construction of heptadecagon has been discussing all the time. Many different construction methods are proposed although they are based on the same theory. Simplification of the construction is still a sensible problem. Here, we propose a simple method for constructing regular heptadecagon with the fewest steps. The accumulation of construction errors is also avoided. This method is more applicable than the previous construction.
摘要Aircraft collaboration design is based on a unified set of schemas containing data and model representations and interfaces across disciplines.The aircraft design schema is a central data model that specifies the paradigm for the representation of a full lifecycle model of aircraft design.The construction of the schema currently lacks theoretical guidance.This paper designs a novel methodology to construct the aircraft design schema,a fully functional,logical,and selfconsistent methodology.The methodology defines a schema matrix that includes implementation strategies,principles,processes,meta-object facility,views,scenarios,and products.The aircraft conceptual design schema is constructed according to the methodology,which is a hands-on approach to help understand the concept and implementation.The features of the methodology are analyzed,and the methodology and the aircraft conceptual design schema are presented to address the pain points of multiple solution trade-offs,multiple iterations,and multidisciplinary coupling in aircraft conceptual collaboration design.
摘要On November 25,the 12th China Overseas Investment Fair(COIF)was held by the China Overseas Development Association in Beijing.Officials and representative from embassies or offices in China from 85 different countries,including the ambassadors from 31 countries,attended this year’s event.The COIF was held with the theme entitled“Concentrating on the post-pandemic era and constructing a new development paradigm”,and focused on how to build platforms and create business opportunities to lift the world economy out of recession.
基金partially sponsored by National Key Project of China (No.2012ZX03001013-003)
摘要In typical Wi-Fi based indoor positioning systems employing fingerprint model,plentiful fingerprints need to be trained by trained experts or technician,which extends labor costs and restricts their promotion.In this paper,a novel approach based on crowd paths to solve this problem is presented,which collects and constructs automatically fingerprints database for anonymous buildings through common crowd customers.However,the accuracy degradation problem may be introduced as crowd customers are not professional trained and equipped.Therefore,we define two concepts:fixed landmark and hint landmark,to rectify the fingerprint database in the practical system,in which common corridor crossing points serve as fixed landmark and cross point among different crowd paths serve as hint landmark.Machinelearning techniques are utilized for short range approximation around fixed landmarks and fuzzy logic decision technology is applied for searching hint landmarks in crowd traces space.Besides,the particle filter algorithm is also introduced to smooth the sample points in crowd paths.We implemented the approach on off-the-shelf smartphones and evaluate the performance.Experimental results indicate that the approach can availably construct WiFi fingerprint database without reduce the localization accuracy.
基金supported by the National Natu-ral Science Foundation of China(Grant Nos.52072196,52002200,52102106,52202262,22379081,22379080)the Major Basic Re-search Program of Natural Science Foundation of Shandong Province(GrantNo.ZR2020ZD09)+1 种基金the Natural Science Foundation of Shandong Province(Grant Nos.ZR2020QE063,ZR202108180009,ZR2023QE059)the Project funded by China Postdoctoral Sci-ence Foundation(Grant No.2023M741871).
摘要Fabricating homojunction photocatalyst is a promising approach to accelerate the separation and transfer of photogenerated charge carriers,and to boost photocatalytic performance.Herein,a novel poly(hep-tazine imide)(PHI)-based S-scheme homojunction photocatalyst(U/T-LHPHI)is fabricated through an ionothermal synthesis route,which exhibits particular high and low crystallinity property,intimate in-terface combination,and locally N self-doping.The regulation of crystallinity contributes to the differen-tiated electronic structure in PHI,which leads to the establishment of internal electric field(IEF).The in-tense IEF and N doping level with electron extracting capacity synergistically promote the charge transfer from the high crystalline PHI(HPHI)to the low crystalline PHI(LPHI)following the S-scheme mecha-nism.Additionally,the strong interfacial interaction improves the interfacial charge transfer dynamics.As a consequence,photogenerated electrons with powerful reducing ability are maintained effectively.Upon light irradiation,the optimized U/T-LHPHI performs an H2 evolution rate of 4880,2416,and 2375μmol g−1 h−1 in deionized water,simulated seawater,and real seawater,respectively,which exceed that of many carefully designed noble metal Pt containing photocatalyst.This work provides an important verifi-cation that the rational design and construction of homojunction photocatalysts could effectively enhance photocatalytic activity.