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Influences of Milling Degree on Zinc Bioavailability in Rice Grains Varied in Zinc and Phytic Acid Levels 认领 引用
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作者 HUO Shaojie LIN Jiaqi +3 位作者 SUN Yuxuan WU Dianxing SHU Xiaoli WANG Yin 《Rice science》 SCIE CAS CSCD 2026年第1期25-29,I0041-I0045,共5页
Zinc(Zn)deficiency is a global health issue,exacerbated by low Zn concentration and poor bioavailability in rice,primarily due to phytic acid(PA)interference.In this study,four doubled haploid(DH)progenies(DH1,DH11,DH... Zinc(Zn)deficiency is a global health issue,exacerbated by low Zn concentration and poor bioavailability in rice,primarily due to phytic acid(PA)interference.In this study,four doubled haploid(DH)progenies(DH1,DH11,DH18,and DH29)with distinct Zn and PA profiles were used to evaluate the effects of varying degrees of milling(DOM)on Zn bioavailability.Results showed DOM followed a double-exponential decay pattern(R2>0.99)with milling time,varying among the four DH lines under identical milling conditions.As DOM increased,Zn,PA,and phosphorus(P)concentrations decreased progressively. 展开更多
关键词 zinc deficiency milling degree zinc bioavailability degrees milling dom double exponential decay pattern rice grains phytic acid
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RNPC-net:Automatic recognition and mapping of weathering degree and groundwater condition of tunnel faces 认领 引用
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作者 Xiang Wu Fengyan Wang +4 位作者 Jianping Chen Mingchang Wang Lina Cheng Chengyao Zhang Junke Xu 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第2期1138-1159,共22页
Accurate and rapid recognition of weathering degree(WD)and groundwater condition(GC)is essential for evaluating rock mass quality and conducting stability analyses in underground engineering.Conventional WD and GC rec... Accurate and rapid recognition of weathering degree(WD)and groundwater condition(GC)is essential for evaluating rock mass quality and conducting stability analyses in underground engineering.Conventional WD and GC recognition methods often rely on subjective evaluation by field experts,supplemented by field sampling and laboratory testing.These methods are frequently complex and timeconsuming,making it challenging to meet the rapidly evolving demands of underground engineering.Therefore,this study proposes a rock non-geometric parameter classification network(RNPC-net)to rapidly achieve the recognition and mapping ofWD and GC of tunnel faces.The hybrid feature extraction module(HFEM)in RNPC-net can fully extract,fuse,and utilize multi-scale features of images,enhancing the network's classification performance.Moreover,the designed adaptive weighting auxiliary classifier(AC)helps the network learn features more efficiently.Experimental results show that RNPC-net achieved classification accuracies of 0.8756 and 0.8710 for WD and GC,respectively,representing an improvement of approximately 2%e10%compared to other methods.Both quantitative and qualitative experiments confirm the effectiveness and superiority of RNPC-net.Furthermore,for WD and GC mapping,RNPC-net outperformed other methods by achieving the highest mean intersection over union(mIOU)across most tunnel faces.The mapping results closely align with measurements provided by field experts.The application of WD and GC mapping results to the rock mass rating(RMR)system achieved a transition from conventional qualitative to quantitative evaluation.This advancement enables more accurate and reliable rock mass quality evaluations,particularly under critical conditions of RMR. 展开更多
关键词 Tunnel face Weathering degree Groundwater condition RNPC-net Hybrid feature extraction module Recognition and mapping
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Switching hydrogenation pathways of furfural via reduction-degree engineering of Ni-based catalysts 认领 引用
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作者 CHANG Xiaoqing JIA Lingyu +4 位作者 DANG Shanshan LU Tianliang WANG Peng TU Weifeng ZHANG Zhenzhou 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第8期220-237,共18页
The selective hydrogenation of biomass-derived compounds is pivotal for the synthesis of high-value-added chemicals.The controllable hydrogenation in furfural for furfuryl alcohol or tetrahydrofurfuryl alcohol is high... The selective hydrogenation of biomass-derived compounds is pivotal for the synthesis of high-value-added chemicals.The controllable hydrogenation in furfural for furfuryl alcohol or tetrahydrofurfuryl alcohol is highly desirable yet challenging.In this study,Ni2Al-LDO(layered double oxide)metal oxide catalyst featuring highly dispersed surface NiO was synthesized via a structural topological transformation using layered double hydroxides.The catalyst exhibited excellent performance in the hydrogenation of furfural,achieving 91.42%yield of furfuryl alcohol(FOL)at 160℃ and 1.4 MPa H2.Gradual reduction of Ni2Al-LDO produced Ni/NiO mixtures,enabling tunable shift from FOL to tetrahydrofurfuryl alcohol(HFOL)as the NiO content decreased and the Ni content increased.After a two-hour reduction at 700℃,the HFOL yield reached 93.95%.CO2-TPD,NH3-TPD and FT-IR measurements revealed that variations in reduction degree on nickel influenced the adsorption behavior of furfural.NiO species could only adsorb the C=O group of furfural,isopropanol serves as the hydrogen source,and furfural undergoes hydrogenation to form furfuryl alcohol following the MPV conversion pathway.Whereas the flat adsorption mode on the metallic Ni surface facilitated the simultaneous adsorption and activation of both the furan ring and the carbonyl group of furfural.In addition,the hydrogen sources of the reaction systems also differ:the Ni2Al-LDO catalyst is only capable of activating isopropanol,with the reaction proceeding via the MPV mechanism;in contrast,Ni2Al-LDO-700 can activate both H2 and isopropanol,where H2 serves as the primary hydrogen source.This work elucidates a clear structure-activity relationship centered on the metal oxidation state and provides a practical reductionengineering approach for designing adaptable catalysts in biomass upgrading. 展开更多
关键词 furfural selective hydrogenation Ni-based catalysts reduction degree selectivity switching
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The Injective Chromatic Index of Planar Graphs with Maximum Degree 4 认领 引用
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作者 Yuliang ZHAO Lianying MIAO Shanshan ZHANG 《Journal of Mathematical Research with Applications》 CSCD 2026年第2期153-163,共11页
An injective k-edge coloring of a graph G is k-edge coloringκof G such thatκ(e1)≠κ(e3)for any three consecutive edges e1,e2 and e3 of a path or a triangle.The injective chromatic index of G,denoted by x'i(G),i... An injective k-edge coloring of a graph G is k-edge coloringκof G such thatκ(e1)≠κ(e3)for any three consecutive edges e1,e2 and e3 of a path or a triangle.The injective chromatic index of G,denoted by x'i(G),is the smallest integer k such that G has an injective k-edge coloring.In this paper,we prove that x'i(G)≤9 if G is a planar graph with maximum degreeΔ≤4,girth g≥6 and without intersecting 6-cycles. 展开更多
关键词 njective edge coloring planar graph maximum degree girth
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A variable coefficient second-degree Abel equation method for the complex Ginzburg-Landau equation with anti-cubic nonlinearity 认领 引用
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作者 Harun Biçer 《Communications in Theoretical Physics》 SCIE CAS CSCD 2026年第6期39-51,共13页
This paper introduces a novel analytical technique called the "Variable Coefficient Second Degree Generalized Abel equation Method"(VCSDGAE),designed to tackle the complex Ginzburg-Landau equation.Unlike con... This paper introduces a novel analytical technique called the "Variable Coefficient Second Degree Generalized Abel equation Method"(VCSDGAE),designed to tackle the complex Ginzburg-Landau equation.Unlike conventional methods that depend on constant coefficient ordinary differential equations(ODEs) and auxiliary ODEs,our approach employs variable coefficient ODEs within a sub-equation framework.We demonstrate the versatility of this method by successfully applying it to the complex Ginzburg-Landau equation.Through the presentation of analytical solutions,we showcase the method's effectiveness and efficiency,positioning it as a valuable resource for addressing complex nonlinear partial differential equations in fields such as fluid dynamics and wave propagation.The stability of the obtained soliton solutions is established through a linear stability analysis,confirming their robustness against small perturbations.This research not only broadens the spectrum of available analytical techniques but also contributes significantly to the advancement of solutions for various mathematical physics models. 展开更多
关键词 complex Ginzburg-Landau equation variable coefficient second degree generalized Abel equation method analytical solutions nonlinear partial differential equations stability analysis
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Node Degree Distribution and Interrelationships of Beijing Subway,Bus,and Composite Network 认领 引用 被引量：1
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作者 Cheng Xiangjun Zhang Chunyue Duan Jinxiao 《Journal of Traffic and Transportation Engineering》 2026年第1期1-7,共7页
This study examines Beijing subway network,bus network and the composite network of the two in 2022.Using stations as nodes and the lines between them as edges,the node degree probability distribution of the resulting... This study examines Beijing subway network,bus network and the composite network of the two in 2022.Using stations as nodes and the lines between them as edges,the node degree probability distribution of the resulting complex networks is calculated.Through regression analysis,it is found that the node degree probability distributions for all three transportation modes follow a negative exponential function,and all three distribution curves decrease as the node degree increases.Among the three probability distribution curves,the node degree probability distribution curve of subway network is at the bottom,the probability distribution curve of bus network is in the middle,and the probability distribution curve of composite network is at the top. 展开更多
关键词 Subway network bus network composite network regression analysis degree distribution.
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A Method for Assessing the Contribution Degree of an Aviation Delivery System and Identifying Key Equipment 认领 引用
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作者 Liu Xiaofeng Jiang Chengze +3 位作者 Chen Xingyu Jiang Deyin Shang Bolin Song Bifeng 《系统仿真学报》 EI CAS CSCD 北大核心 2026年第8期2223-2249,共27页
Based on the delivery efficiency and delivery quality,a general aviation delivery system effectiveness evaluation model was constructed,and a calculation method of system contribution degree based on efficiency was gi... Based on the delivery efficiency and delivery quality,a general aviation delivery system effectiveness evaluation model was constructed,and a calculation method of system contribution degree based on efficiency was given.By combining the system calculation experiment and simulation experiment based on agent-based modeling and simulation(ABMS),the design idea of the Monte Carlo simulation experiment for key equipment identification and equipment technology development trend analysis was sorted out,and the key equipment identification method based on ABMS and contribution evaluation was proposed.By taking the intercontinental long-range aviation delivery mission as an example,a variety of simulation experiments were designed to evaluate the contribution degree of the system based on the simulation data of the efficiency index,analyze the impact of equipment changes on the efficiency and contribution degree and the contribution mechanism,identify the key equipment,and determine the development trend of equipment technology. 展开更多
关键词 aviation delivery system system contribution degree agent-based modeling and simulation(ABMS) architecture modeling analysis
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On Extremal Trees with Given Degree Sequence for ABS Index 认领 引用
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作者 LI Fengwei YE Qingfang 《数学进展》 CSCD 北大核心 2026年第3期567-577,共11页
The atom-bond sum-connectivity(ABS)index of a graph G=(V,E)is defined as■,where d(ζ)represents the degree of vertexζ∈V.By using ABS index,the heat of formation of octane and heptane can be accurately predicted.The... The atom-bond sum-connectivity(ABS)index of a graph G=(V,E)is defined as■,where d(ζ)represents the degree of vertexζ∈V.By using ABS index,the heat of formation of octane and heptane can be accurately predicted.The extremal trees with fixed degree sequences that maximize or minimize the ABS index are characterized in this paper.Meanwhile,we offer construction algorithms for these kinds of trees. 展开更多
关键词 topological index ABS index tree degree sequence extremal graph
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Chorded Pancyclicity of k-partite Graphs with Given Minimum Degree 认领 引用
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作者 LU Haixiang HUANG Xueyi 《数学进展》 CSCD 北大核心 2026年第2期263-271,共9页
A graph is Hamiltonian if it contains a cycle that visits each vertex of the graph exactly once.A chord of a cycle C is an edge that joins two non-consecutive vertices of C.A graph of order n is chorded pancyclic if i... A graph is Hamiltonian if it contains a cycle that visits each vertex of the graph exactly once.A chord of a cycle C is an edge that joins two non-consecutive vertices of C.A graph of order n is chorded pancyclic if it contains a chorded cycle of length k for every integer k with 4≤k≤n.In 2018,Ferro and Lesniak gave an edge number conditon for the Hamiltonicity(and the chorded pancyclicity)of balanced and unbalanced k-partite graphs.In this paper,we extend the main results of Ferro and Lesniak,and provide an edge condition for the Hamiltonicity(and the chorded pancyclicity)of balanced and unbalanced k-partite graphs with given minimum degree,respectively. 展开更多
关键词 Hamiltonicity chorded pancycliclity k-partite graph minimun degree
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Node Degree Distribution and Interrelationships of China High-speed Railway Network,Aviation Network and Composite Network 认领 引用
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作者 Cheng Xiangjun Yu Aihui 《Journal of Traffic and Transportation Engineering》 2026年第3期113-120,共8页
This study examines China high-speed railway network,aviation network and the composite network.Using stations as nodes and the lines between them as edges,the node degree probability distribution of the resulting com... This study examines China high-speed railway network,aviation network and the composite network.Using stations as nodes and the lines between them as edges,the node degree probability distribution of the resulting complex networks is calculated.Through regression analysis,it is found that:the node degree probability distribution of China high-speed railway network is negative exponential function,aviation network and composite network are power function.The probability distribution curve of the high-speed railway network is at the left,the distribution curve of the composite network is in the middle,and the distribution curve of the aviation network is at the right.The node degree probability distribution curve of the high-speed railway network is the steepest.The probability distribution curve of the aviation network and composite network have similar shapes.For all three,the occurrence probability of node degrees decreases as the degree increases. 展开更多
关键词 High-speed railway network aviation network composite network regression analysis node degree distribution
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A Quasi-Experimental Study of a Dual-Supervisor Training Model and Self-Reported Research Training Needs among Clinical Professional Degree Postgraduates 认领 引用
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作者 Xiaotong Wang Yijia Chen +6 位作者 Xiang Gao Hang Lin Lifeng Zhang Huimin Zhou Liping Liu Jing Wang Kunpeng Zhang 《Journal of Contemporary Educational Research》 2026年第4期304-311,共8页
Objective:To examine the association between a dual-supervisor training model and self-reported research training needs.Methods:A quasi-experimental study with natural grouping was adopted.A total of 114 clinical prof... Objective:To examine the association between a dual-supervisor training model and self-reported research training needs.Methods:A quasi-experimental study with natural grouping was adopted.A total of 114 clinical professional degree postgraduates(Grade 2023)from a hospital affiliated to a university in Qingdao were enrolled.According to the training plans established at enrollment,57 students were assigned to the dual-supervisor group and 59 to the single-supervisor group.Finally,56 students in the dual-supervisor group and 58 in the single-supervisor group completed the study.Questionnaire surveys on research needs were conducted before(March 2024)and one year after(March 2025)the supervisor guidance.Chi-square test,Fisher’s exact test,and McNemar test were used to analyze the differences between and within groups.Results:The two groups were comparable at baseline(P>0.05).After one year of guidance,the dual-supervisor group reported lower levels of unmet training needs than the single-supervisor group in research process cognition(25.0%vs 48.3%,χ2=6.892,P=0.009),statistical software application(41.1%vs 67.2%,χ2=7.562,P=0.006),scientific graphing ability(39.3%vs 65.5%,χ2=8.247,P=0.004),and academic presentation ability(32.1%vs 55.2%,χ2=6.215,P=0.013).The dual-supervisor group showed significant reductions in self-reported training needs in multiple indicators before and after the intervention(P0.05).Conclusion:The dual-supervisor training model was associated with lower self-reported unmet research training needs among clinical professional degree postgraduates,compared with the single-supervisor model in several domains,and is worthy of further promotion and improvement. 展开更多
关键词 Clinical medicine Professional degree postgraduate Dual-supervisor system Training model Research competence Teaching reform
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Reform of Practical Outcome Evaluation Mechanisms for Design Professional Degree Postgraduates 认领 引用
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作者 Danhua Xu Wei Zhu +2 位作者 Xiaoyu Ying Miao Zhou Jiantao Weng 《Journal of Contemporary Educational Research》 2026年第5期84-90,共7页
The cultivation of design professional degree postgraduates emphasizes practical ability and innovative spirit.However,the current evaluation system generally suffers from overemphasis on academic achievements at the ... The cultivation of design professional degree postgraduates emphasizes practical ability and innovative spirit.However,the current evaluation system generally suffers from overemphasis on academic achievements at the expense of practical ability,disconnection between curriculum and industry needs,and diversity without integration of supervisor teams.Taking the cultivation of design professional degree postgraduates at Hangzhou City University as a case study,this research constructs a multi-dimensional evaluation mechanism centered on practical outcomes from three dimensions:evaluation orientation transformation,teaching model reform,and supervisor collaboration optimization.By building interdisciplinary supervisor groups,implementing real-project-driven practical teaching,establishing a multi-stakeholder evaluation system,and using information technology for process data collection and dynamic feedback,this study explores a feasible path for transforming the evaluation system for design postgraduates.In a two-year action research project,a controlled experiment was conducted on 14 postgraduates(7 in the reform group,7 in the control group).Data were collected through questionnaires,in-depth interviews,and outcome comparisons.The results show that the reform group significantly outperformed the control group in design intention clarity,practical problem awareness,supervisor feedback benefit,and evaluation fairness.The participation rate and award rate in design competitions,as well as the average blind review score of teachers,were significantly higher.This paper provides operational experience and reference for the evaluation reform of postgraduate education in design and related disciplines. 展开更多
关键词 Design professional degree Postgraduate education Practical outcome evaluation Multi-dimensional evaluation Interdisciplinary cultivation
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Towards sustainable pavement construction: A review of the degree of blending in hot recycled asphalt mixture 认领 引用 被引量：3
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作者 Ziming Liu Shi Dong +1 位作者 Kun Xi Hainian Wang 《Journal of Road Engineering》 EI CAS 2025年第3期427-451,共25页
The use of hot recycled asphalt mixture(HRAM)allows for a reduction in the depletion of non-renewable resources and presents environmental benefits.However,concerns arise regarding the performance of HRAM due to the l... The use of hot recycled asphalt mixture(HRAM)allows for a reduction in the depletion of non-renewable resources and presents environmental benefits.However,concerns arise regarding the performance of HRAM due to the lower degree of blending(DOB)of virgin and aged asphalt(V&A asphalt).This paper aims to provide an up-to-date review on the DOB of V&A asphalt in HRAM.Initially,the paper introduces the DOB of V&A asphalt,followed by an analysis of the blending theory,evaluation methods,and influencing factors of DOB.Subsequently,the effect of DOB on the performance of HRAM is investigated,and molecular dynamic simulation is utilized to analyze the blend of V&A asphalt.Finally,methods for improving DOB are summarized.It was found that the use of high-resolution microscopy with tracer methods such as SEM/EDS was an effective way to characterize DOB.Furthermore,the chemical composition and colloid structure between virgin and aged asphalt are crucial to DOB.Additionally,improving DOB by utilizing the coupling effect of time and temperature during transportation,paving,and compaction stages is promising.Future research should focus on standardizing test methods,refining field simulation models,and developing intelligent construction technologies to achieve more efficient and durable blending.This review provides theoretical guidance and practical references for improving the DOB of V&A asphalt and promoting sustainable pavement construction. 展开更多
关键词 Sustainable pavement Hot recycled asphalt mixture Degree of blending Evaluation methods Indicators Molecular dynamics simulation
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Optimizing structural ordering degree to improve the mechanical reliability of metallic glasses 认领 引用 被引量：1
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作者 Shuang Su Wenjie Zhao +6 位作者 Xin Su Yagnesh Shadangi Zhishuai Jin Zhiliang Ning Yanming Zhang Jianfei Sun Yongjiang Huang 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第24期304-314,共11页
This study systematically investigates the influences of annealing treatment on the energy state,microstructure and macroscopic mechanical behaviors of metallic glasses(MGs).By reducing the energy state,the annealing ... This study systematically investigates the influences of annealing treatment on the energy state,microstructure and macroscopic mechanical behaviors of metallic glasses(MGs).By reducing the energy state,the annealing process significantly enhances the structural ordering degree and uniformity of MGs,thereby improving their overall mechanical reliability.Specifically,annealing promotes the formation of localized icosahedral short-range order,a structural signature that contributes to improved nanohardness and tensile strength.Furthermore,the release and redistribution of internal stress during annealing further optimize the internal stress state,significantly enhancing the fracture resistance and achieving reliable mechanical performance.This study not only elucidates the regulatory mechanisms of annealing on the microstructure of MGs but also provides theoretical support and experimental evidence for exploring MG materials with high strength and high fracture reliability. 展开更多
关键词 Metallic glasses Annealing Ordering degree Mechanical performance
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Method for Evaluating the Degrees of Land Use Sustainability of Mountainous County and its Application in Yunnan Province,China 认领 引用 被引量：11
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作者 YANG Zisheng LIU Yansui +2 位作者 TAO Wenxing XU Jingling ZHAO Qiaogui 《Journal of Mountain Science》 SCIE 2008年第2期98-112,共15页
The evaluation of sustainable land use is the key issue in the field of studying the sustainable land utilization. In general analysis, the sustainable land use is evaluated respectively from its ecological sustainabi... The evaluation of sustainable land use is the key issue in the field of studying the sustainable land utilization. In general analysis, the sustainable land use is evaluated respectively from its ecological sustainability, economic sustainability and social sustainability in China and other countries in recent years. Although this evaluation is an important work, it seems insufficient and hard to comprehensively reflect the whole degree of land use sustainability. Thus, to make up this deficiency, this paper brings forward the evaluation indexes, which make it possible to quantitatively reflect the whole degree of land use sustainability, namely, the concept of ＂degrees of overall land use sustainability＂ （Dos）, and research and measurement development of the method of and calculation in Dos. Taking the evaluation of the degree of land use sustainability in county regions of Yunnan Province as the actual example for analysis, results are basically as follows： 1） The degree of land use sustainability （Dos） is the ration index to organically and systematically integrate the degree of ecological friendliness （DeF）, the degree of economic viability （Dev） and the degree of social acceptability （Dsa）, able to comprehensively reflect the whole sustainability degree of regional land use 2） Based on the value of Dos, the grading system and standard for the sustainability of land use may be established and totally divided into five grades, namely, the high-degree sustainability, middle-degree sustainability, low-degree sustainability, conditional sustainability and non-sustainability. Meanwhile, the standard for distinguishing sustainability grades has also been confirmed so as to determine the nature of sustainability degrees in different grades. This makes the possibility for the combination of nature determination with ration in research result and provides with the scientific guideline and decision-making gist for better implementation of sustainable land use strategy. 3） The practice in evaluation of sustainability degree in county regional land use in Yunnan shows that the value of the degree of land use sustainability （Dos） of whole Yunnan Province is only 58.39, belonging to the grade of low-degree sustainability. Two thirds of counties in the whole province represent the grade of ＂conditional sustainability＂ and ＂non-sustainability＂ in the sustainability of land use. Among these counties, 11.11 % shows ＂non- sustainability＇. The lowest degree of land use sustainability appears especially in the middle plateau mountain region of Northeast Yunnan, where the value of Dos in most counties （districts） is below 40 %, belonging to the grade of ＂non-sustainability＂. The sustainability degree in the karst mountainous region in lower-middle plateau mountain region in Southeast Yunnan is generally low and the value of sustainability degree （Dos） in most of the counties （cities and districts） is below 55. The value of sustainability degree （Dos） in most of the counties （cities and districts） in the north, west, northwest and southwest parts of Yunnan is below 55. This article also analyzes the reasons of low degree of sustainability in land use in Yunnan and puts forward the countermeasures to increase the degree of sustainability in land use in the whole province. 展开更多
关键词 Land use degrees of overall sustainability evaluation method county level degrees of ecological friendliness degrees of economic viability degrees of social acceptability
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Detection of rock joints and opening degrees based on drilling parameters and moving average filter 认领 引用
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作者 Wenhao Yi Mingnian Wang +2 位作者 Qinyong Xia Honglin Shen Siguang Zhao 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第10期6130-6144,共15页
2The joint opening degree is a critical index for assessing the stability of jointed rock masses,which directly impacts the rock mass quality.It is also a key factor influencing the design of tunnel support structures... 2The joint opening degree is a critical index for assessing the stability of jointed rock masses,which directly impacts the rock mass quality.It is also a key factor influencing the design of tunnel support structures.Hammer and rotary drilling rigs,commonly employed as rock-breaking equipment in tunneling,inevitably encounter joints with varying opening degrees during construction.This research aims to enhance the sampling frequency of hammer and rotary drilling rigs and optimize the joint detection algorithm,thereby equipping these rigs with the capability to detect joint opening degrees.This paper develops high-frequency acquisition equipment for drilling parameters to realize millimeter-level data acquisition.Drilling experiments on jointed rock mass are conducted under conditions corresponding to joint opening degrees of 1 mm,3 mm,and 5 mm.The relationships among joint opening degree,drilling parameters,and width of rock failure region are investigated.A joint opening degree detection algorithm is proposed based on the drilling parameters and moving average filter.The results indicate that the curves of penetration velocity and rotary pressure along the drilling direction exhibit a three-segment distribution,i.e."stable segment-adjustment segment-stable segment".The variation curves of drilling parameters display a“velocity mountain”and a“pressure valley”in the failure region.The relative errors in joint opening degree estimation based on penetration velocity and rotary pressure range from 3.4%to 32%and from 6%to 35%,with average relative errors of 12.95%and 16.24%,respectively. 展开更多
关键词 Joint opening degree Drilling parameters Hammer and rotary drilling rigs Drilling experiment Data filtering
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Slip rate and locking degree of Haiyuan fault zone,northeastern Qinghai-Xizang plateau,based on refined block model and GPS data 认领 引用
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作者 Yang Liu Yuxuan Qiu +2 位作者 Jialiang Liu Yu Zhang Caijun Xu 《Geodesy and Geodynamics》 EI CSCD 2025年第5期536-545,共10页
As a major fault in the northeastern Qinghai-Xizang Plateau,the Haiyuan fault zone is important for understanding the regional deformation.Aiming at the differences in the slip rate and locking degree obtained from di... As a major fault in the northeastern Qinghai-Xizang Plateau,the Haiyuan fault zone is important for understanding the regional deformation.Aiming at the differences in the slip rate and locking degree obtained from different studies,this study constructs a refined block model(including Qilian,Alxa,Ordos,Xining,Haiyuan,and Lanzhou blocks)and uses the grid search and simulated annealing methods to invert GPS data for slip rate and locking degree of the Haiyuan fault zone.The results are as follows:(1)The sinistral slip rates in the western,middle,and eastern segments are 4.93-5.22 mm/a,1.52-4.94 mm/a,and 0.43-1.18 mm/a,decreasing eastward on the whole,while the compression rates are 0.45-1.26 mm/a,0.58-2.62 mm/a,and3.52-4.48 mm/a,increasing eastward on the whole.(2)The locking depth of the western segment increases from about 5 km to about 20 km eastward;the middle segment decreases and then increases eastward;the eastern segment concentrates at about 20 km(PHI is about 0.86).(3)The slip deficit is relatively higher in the Lenglongling,Jinqianghe,Maomaoshan,and Liupanshan faults(averaging about 3.42 mm/a,4.16 mm/a,4.23 mm/a,and 3.43 mm/a within 20 km).(4)The Qilian,Alxa,Xining,Lanzhou,and Haiyuan blocks rotate clockwise,while the Ordos block rotates counterclockwise.Additionally,by comparing different block models,the Haiyuan block should be considered independently.The Haiyuan fault zone adjusts surrounding block movements and uplifts Liupanshan mountain tectonically.The results can provide important references for understanding the regional earthquake risk and deformation mechanism. 展开更多
关键词 Haiyuan fault zone Block model Locking degree Slip rate
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Delay bounded routing with the maximum belief degree for dynamic uncertain networks 认领 引用
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作者 MA Ji KANG Rui +3 位作者 LI Ruiying ZHANG Qingyuan LIU Liang WANG Xuewang 《Journal of Systems Engineering and Electronics》 SCIE CSCD 2025年第1期127-138,共12页
Delay aware routing is now widely used to provide efficient network transmission. However, for newly developing or developed mobile communication networks(MCN), only limited delay data can be obtained. In such a netwo... Delay aware routing is now widely used to provide efficient network transmission. However, for newly developing or developed mobile communication networks(MCN), only limited delay data can be obtained. In such a network, the delay is with epistemic uncertainty, which makes the traditional routing scheme based on deterministic theory or probability theory not applicable. Motivated by this problem, the MCN with epistemic uncertainty is first summarized as a dynamic uncertain network based on uncertainty theory, which is widely applied to model epistemic uncertainties. Then by modeling the uncertain end-toend delay, a new delay bounded routing scheme is proposed to find the path with the maximum belief degree that satisfies the delay threshold for the dynamic uncertain network. Finally, a lowEarth-orbit satellite communication network(LEO-SCN) is used as a case to verify the effectiveness of our routing scheme. It is first modeled as a dynamic uncertain network, and then the delay bounded paths with the maximum belief degree are computed and compared under different delay thresholds. 展开更多
关键词 dynamic uncertain network uncertainty theory epistemic uncertainty delay bounded routing maximum belief degree
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Ordering Degree Regulation of Pt2NiCo Intermetallics for Efficient Oxygen Reduction Reaction 认领 引用
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作者 Chen-Hao Zhang Han-Yu Hu +3 位作者 Jun-Hao Yang Qian Zhang Chang Yang De-Li Wang 《电化学（中英文）》 CAS 北大核心 2025年第4期12-23,共12页
Alloying transition metals with Pt is an effective strategy for optimizing Pt-based catalysts toward the oxygen reduction reaction(ORR).Atomic ordered intermetallic compounds(IMC)provide unique electronic and geometri... Alloying transition metals with Pt is an effective strategy for optimizing Pt-based catalysts toward the oxygen reduction reaction(ORR).Atomic ordered intermetallic compounds(IMC)provide unique electronic and geometrical effects as well as stronger intermetallic interactions due to the ordered arrangement of metal atoms,thus exhibiting superior electrocata-lytic activity and durability.However,quantitatively analyzing the ordering degree of IMC and exploring the correlation between the ordering degree and ORR activity remains extremely challenging.Herein,a series of ternary Pt2NiCo interme-tallic catalysts(o-Pt2NiCo)with different ordering degree were synthesized by annealing temperature modulation.Among them,the o-Pt2NiCo which annealed at 800℃for two hours exhibits the highest ordering degree and the optimal ORR ac-tivity,which the mass activity of o-Pt2NiCo is 1.8 times and 2.8 times higher than that of disordered Pt2NiCo alloy and Pt/C.Furthermore,the o-Pt2NiCo still maintains 70.8%mass activity after 30,000 potential cycles.Additionally,the ORR activity test results for Pt2NiCo IMC with different ordering degree also provide a positive correlation between the ordering degree and ORR activity.This work provides a prospective design direction for ternary Pt-based electrocatalysts. 展开更多
关键词 Fuel cell Oxygen reduction reaction Electrocatalysis Intermetallic compound Ordering degree
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Stochastic response of steel columns subjected to lateral blast based on modified single degree of freedom(MSDOF)method 认领 引用
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作者 Mohammad Momeni Chiara Bedon +1 位作者 Mohammad Ali Hadianfard Sina Malekpour 《Resilient Cities and Structures》 EI CSCD 2025年第1期1-15,共15页
This paper aims to evaluate the stochastic response of steel columns subjected to blast loads using the modified single degree of freedom(MSDOF)method,which assessed towards the conventional single degree of freedom(S... This paper aims to evaluate the stochastic response of steel columns subjected to blast loads using the modified single degree of freedom(MSDOF)method,which assessed towards the conventional single degree of freedom(SDOF)and the experimentally validated Finite Element(FE)methods(LSDYNA).For this purpose,special atten-tion is given to calculating the response of H-shaped steel columns under blast.The damage amount is determined based on the support rotation criterion,which is expressed as a function of their maximum lateral mid-span dis-placement.To account for uncertainties in input parameters and obtain the failure probability,the Monte Carlo simulation(MCS)method is employed,complemented by the Latin Hypercube Sampling(LHS)method to reduce the number of simulations.A parametric analysis is hence performed to examine the effect of several input pa-rameters(including both deterministic and probabilistic parameters)on the probability of column damage as a function of support rotation.First,the MSDOF method confirms its higher accuracy in estimating the probability of column damage due to blast,compared to the conventional SDOF.The collected results also show that un-certainties of several input parameters have significant effects on the column behavior.In particular,geometric parameters(including cross-sectional characteristics,boundary conditions and column length)have major effect on the corresponding column response,in the same way of input blast load parameters and material properties. 展开更多
关键词 Stochastic response Steel column Lateral blast Uncertainty Modified single degree of freedom(MSDOF) method Parametric analysis
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