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Inherently chiral molecular barrels via directional cascade hooping 认领 引用
1
作者 Hao Zhou Xu-Dong Wang +2 位作者 Yu-Fei Ao De-Xian Wang Qi-Qiang Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第5期344-348,共5页
A kind of inherently chiral molecular barrels were efficiently constructed by a directional cascade hooping strategy.This strategy involves the anchoring of three nonsymmetric connecting arms onto a cap-dissymmetric b... A kind of inherently chiral molecular barrels were efficiently constructed by a directional cascade hooping strategy.This strategy involves the anchoring of three nonsymmetric connecting arms onto a cap-dissymmetric bis(tetraoxacalix[2]arene[2]triazine)cage core,followed by hooping via imine condensation and reduction to afford the target molecular barrels with well-defined connectivity.The precise and high-yielding synthesis stems from both the bidirectional Ctriazine-N bond flipping dynamics and the reversible nature of imine formation.The molecular barrels comprise a bis(tetraoxacalix[2]arene[2]triazine)core encircled by a 72-membered loop,forming three fan-shaped cavities with inherent chirality and multiple endo-functionalized sites.The existence of multiple diastereoisomeric conformers due to the restricted Ctriazine-N bond flipping by the constrained loop structure was revealed by variable-temperature NMR studies and DFT calculations. 展开更多
关键词 Inherent chirality Molecular cage Desymmetrization Imine condensation Conformation interconversion
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Advancing the industrial production of propylene oxide toward inherent safety and environmental sustainability:A mini review 认领 引用
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作者 Hanlin Jin Yupeng Tian +5 位作者 Yujia Liu Chenyang Zhao Yizhou Yang Ming Gong Xuejing Yang Bing Sun 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2026年第6期259-267,共9页
Propylene oxide(PO)is an important chemical intermediate that has experienced a continuous rise in annual demand.Traditional processes such as the chlorohydrin process and hydrogen peroxidepropylene oxide process(HPPO... Propylene oxide(PO)is an important chemical intermediate that has experienced a continuous rise in annual demand.Traditional processes such as the chlorohydrin process and hydrogen peroxidepropylene oxide process(HPPO)are gradually being phased out due to environmental pollution,complex procedures,and economic inefficiencies.The discovery of the titanium silicalite-1 zeolite has markedly improved the activity and selectivity of the HPPO process,facilitating its industrial application.Nonetheless,the costs associated with the storage and transportation of H2O2,along with its safety risks during the process,continue to pose a limitation.This paper presents a comprehensive review of the current industrial status,risk analysis,and advancements in inherent safety research concerning the production of PO.The review systematically assesses the advantages and limitations of various production processes,focusing on safety,environmental impact,and lifecycle risk analysis.The gas-phase epoxidation of propylene and electrochemical epoxidation technology have become prominent research areas due to their mild reaction conditions,streamlined processes,and risk reduction at the source.These approaches provide new directions for inherently-safer PO production.Future efforts should prioritize addressing challenges in catalyst performance and process integration to propel the PO industry toward greater efficiency,safety,and sustainability. 展开更多
关键词 Propylene oxide Inherent safety Gas-phase epoxidation Microreactor Electro-oxidation
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A model LayerDFN for characterizing the inherent anisotropic rocks with large-scale and dense joints 认领 引用
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作者 Gang Han Shuling Huang +4 位作者 Chuanqing Zhang Xiuli Ding Yuting Zhang Yang Gao Jun He 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第3期1569-1584,共16页
Large-scale and heavily jointed rocks have inherent planes of anisotropy and secondary structural planes,such as dominant joint sets and random fractures,which result in significant differences in their failure mechan... Large-scale and heavily jointed rocks have inherent planes of anisotropy and secondary structural planes,such as dominant joint sets and random fractures,which result in significant differences in their failure mechanism and deformation behavior compared to other rock types.To address this issue,inherent anisotropic rocks with large-scale and dense joints are considered to be composed of the rock matrix,inherent planes of anisotropy,and secondary structural planes.Then a new implicit continuum model called LayerDFN is developed based on the crack tensor and damage tensor theories to characterize the mechanical properties of inherent anisotropic rocks.Furthermore,the LayerDFN model is implemented in the FLAC3D software,and a series of numerical results for typical example problems is compared with those obtained from the 3DEC,the analytical solutions,similar classical models,laboratory uniaxial compression tests,and field rigid bearing plate tests.The results demonstrate that the LayerDFN model can effectively capture the anisotropic mechanical properties of inherent anisotropic rocks,and can quantitatively characterize the damaging effect of the secondary structural planes.Overall,the numerical method based on the LayerDFN model provides a comprehensive and reliable approach for describing and analyzing the behavior of inherent anisotropic rocks,which will provide valuable insights for engineering design and decision-making processes. 展开更多
关键词 Inherent anisotropic rocks Secondary structural planes Constitutive model Crack tensor Damage tensor
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Inherent Strain Modeling of Residual Stress and Deformation for Laser Powder Bed Fused Artificial Knee Implants Under Different Building Schemes 认领 引用
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作者 Li Chenchen Ren Xuepeng +2 位作者 Pan Laitao Shen Falei Fang Xiaoying 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2025年第6期1417-1425,共9页
Through a modified inherent strain model based on the minimum residual stress and deformation,three building schemes with different building postures and support structures were evaluated by finite element analysis.Re... Through a modified inherent strain model based on the minimum residual stress and deformation,three building schemes with different building postures and support structures were evaluated by finite element analysis.Results demonstrate that according to the principle of reducing the overall height of the building and reducing the support structure with a large tilt angle from the building direction,the residual stress and deformation can be effectively reduced by proper design of building posture and support before laser powder bed melting.Moreover,without the data of thermophysical property variation of Ti-6Al-4V artificial knee implants with temperature,predicting the residual stress and deformation with acceptable accuracy and reduced time cost can be achieved by the inherent strain model. 展开更多
关键词 residual stress inherent strain method titanium alloy laser powder bed fusion additive manufacturing
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Undrained bearing capacity of obliquely-eccentrically loaded shallow foundations overlying a heterogeneous and inherently anisotropic clay deposit 认领 引用 被引量：1
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作者 Maedeh Nasiri Pishvari Hessam Fathipour +3 位作者 Suraparb Keawsawasvong Boonchai Ukritchon Meghdad Payan Reza Jamshidi Chenari 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2025年第1期586-613,共28页
Clay deposits typically exhibit significant degrees of heterogeneity and anisotropy in their strength and stiffness properties.Such non-monotonic responses can significantly impact the stability analysis and design of... Clay deposits typically exhibit significant degrees of heterogeneity and anisotropy in their strength and stiffness properties.Such non-monotonic responses can significantly impact the stability analysis and design of overlying shallow foundations.In this study,the undrained bearing capacity of shallow foundations resting on inhomogeneous and anisotropic clay layers subjected to oblique-eccentric combined loading is investigated through a comprehensive series of finite element limit analysis(FELA)based on the well-established lower-bound theorem and second-order cone programming(SOCP).The heterogeneity of normally consolidated(NC)clays is simulated by adopting a well-known general model of undrained shear strength increasing linearly with depth.In contrast,for overconsolidated(OC)clays,the variation of undrained shear strength with depth is considered to follow a bilinear trend.Furthermore,the inherent anisotropy is accounted for by adopting different values of undrained shear strength along different directions within the soil medium,employing an iterative-based algorithm.The results of numerical simulations are utilized to investigate the influences of natural soil heterogeneity and inherent anisotropy on the ultimate bearing capacity,failure envelope,and failure mechanism of shallow foundations subjected to the various combinations of vertical-horizontal(V-H)and vertical-moment(V-M)loads. 展开更多
关键词 Shallow foundation Bearing capacity Combined loading Undrained shear strength Inherent anisotropy Heterogeneity
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Online Estimation of DC-link Capacitor Parameters of Three-Level NPC Converters Using Inherent Signals Analysis 认领 引用 被引量：1
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作者 Ricardo Lucio de Araujo Ribeiro Reuben Palmer Rezende de Sousa +2 位作者 Alexandre Cunha Oliveira Antonio Marcus Nogueira Lima Qing-Long Han 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2025年第7期1434-1444,共11页
This paper presents a method for estimating the parameters of DC-link capacitors in three-level NPC voltage source inverters(3L-NPC-VSI)used in grid-tied systems.The technique uses the signals generated by the intermo... This paper presents a method for estimating the parameters of DC-link capacitors in three-level NPC voltage source inverters(3L-NPC-VSI)used in grid-tied systems.The technique uses the signals generated by the intermodulation caused by the PWM strategy and converter topology interaction to estimate the capacitor parameters of the converter DC-link.It utilizes an observer-based structure consisting of a recursive noninteger sliding discrete Fourier transform(rnSDFT)and an RLS filter improved with a forgetting factor(oSDFT-RLS)to accurately estimate the capacitance and equivalent series resistance(ESR).Importantly,this method does not require additional sensors beyond those already installed in off-the-shelf 3L-NPC-VSI systems,ensuring its noninvasiveness.Furthermore,the oSDFTRLS estimates capacitor parameters in the time-frequency domain,enabling the tracking of capacitor degradation and predicting potential faults.Experimental results from the laboratory setup demonstrate the effectiveness of the proposed condition monitoring method. 展开更多
关键词 Aluminum electrolytic capacitors(AEC) condition monitoring forgetting factor inherent signals parameter estimation recursive least squares(RLS) sliding discrete Fourier transform(SDFT) three-level NPC converter
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Stable Vertical Takeoff of an Insect-Mimicking Flapping-Wing System Without Guide Implementing Inherent Pitching Stability 认领 引用 被引量：17
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作者 Hoang Vu Phan Quoc Viet Nguyen +5 位作者 Quang Tri Truong Tien Van Truong Hoon Cheol Park Nam Seo Goo Doyoung Byun Min Jun Kim 《Journal of Bionic Engineering》 SCIE EI CSCD 2012年第4期391-401,共11页
We briefly summarized how to design and fabricate an insect-mimicking flapping-wing system and demonstrate how to implement inherent pitching stability for stable vertical takeoff. The effect of relative locations of ... We briefly summarized how to design and fabricate an insect-mimicking flapping-wing system and demonstrate how to implement inherent pitching stability for stable vertical takeoff. The effect of relative locations of the Center of Gravity （CG） and the mean Aerodynamic Center （AC） on vertical flight was theoretically examined through static force balance considera- tion. We conducted a series of vertical takeoff tests in which the location of the mean AC was determined using an unsteady Blade Element Theory （BET） previously developed by the authors. Sequential images were captured during the takeoff tests using a high-speed camera. The results demonstrated that inherent pitching stability for vertical takeoff can be achieved by controlling the relative position between the CG and the mean AC of the flapping system. 展开更多
关键词 beetle flapping-wing system insect-mimicking insect flight inherent pitching stability vertical takeoff
Strength-Toughening Model of Eutectic Ceramic Composite with Inherent Defects 认领 引用 被引量：2
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作者 FU Yunwei ZHANG Long +3 位作者 NI Xinhua LIU Xiequan CHEN Cheng ZHAO Siyuan 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2014年第4期754-760,共7页
Strengthening and toughening mechanisms in composite ceramics is complex. A change in a single parameter induces multiple property variations. The multiple changes in properties are often incompletely represented in t... Strengthening and toughening mechanisms in composite ceramics is complex. A change in a single parameter induces multiple property variations. The multiple changes in properties are often incompletely represented in theoretical models. This incompleteness in the parameter chosen fails to explain the mechanism of failure in composite ceramics. The exponential toughness function is used to represent the pull-out toughening mechanism, which dominates the crack growth resistance curve（R-curve）. The strengthening-toughening model is established based on the Mori-Tanaka method（M-T method）. The influence of inherent defects on toughness function and strength is analyzed by using this model. The theoretical result is compared with the experiment data. This model exactly reflects the change in strength. The theoretical result indicates that defects change the toughness function. Moreover, micro-cracks increase toughness size ac, and the strength of crack instable extensions acutely decreases as defect content increases. This presented model establishes the relationship among the important mechanical parameters of defect, strength, elastic modulus, and the R-curve. 展开更多
关键词 inherent defects pull-out toughening toughness function strength
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A Signed Digraphs Based Method for Detecting Inherently Unsafe Factors of Chemical Process at Conceptual Design Stage 认领 引用 被引量：4
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作者 王杭州 陈丙珍 +2 位作者 何小荣 邱彤 章龙江 《Chinese Journal of Chemical Engineering》 SCIE EI CAS 2008年第1期52-56,共5页
Digraph-based causal models have been widely used to model the cause and effect behavior of process systems. Signed digraphs （SDG） capture the direction of the effect. It should be mentioned that there are loops in ... Digraph-based causal models have been widely used to model the cause and effect behavior of process systems. Signed digraphs （SDG） capture the direction of the effect. It should be mentioned that there are loops in SDG generated from chemical process. From the point of the inherent operability, the worst unsafe factor is the SDG having positive loops that means any disturbance occurring within the loop will propagate through the nodes one by one and are amplified gradually, so the system may lose control, which may lead to an accident. So finding the positive loops in a SDG and treating these unsafe factors in a proper manner can improve the inherent safety of a chemical process. This article proposed a method that can detect the above-mentioned unsafe factors in the proc- ess conceptual design stage automatically through the analysis of the SDG generated from the chemical process. A case study is illustrated to show the working of the algorithm, and then a complicated case from industry is studied to depict the effectiveness of the proposed algorithm. 展开更多
关键词 signed digraphs inherent safety conceptual design
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Study on inherent neutron sources in MSR 认领 引用 被引量：2
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作者 Rui-Min Ji Cheng-Gang Yu +3 位作者 Ming-Hai Li Rui Yan Yang Zou Gui-Min Liu 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2018年第4期146-154,共9页
The molten salt reactor(MSR) has received much recent attention. The presence of beryllium and the mixing of actinides with light nuclei in the fuel salt result in a relatively strong neutron source that can affect th... The molten salt reactor(MSR) has received much recent attention. The presence of beryllium and the mixing of actinides with light nuclei in the fuel salt result in a relatively strong neutron source that can affect the surveillance at subcritical and transient characteristics during operation. In this study, we predict the inherent neutron sources based on a MSR model. The calculation shows that in the fresh core, the inherent neutron sources are mainly from alpha-induced neutrons. After power operation, the inherent neutron sources become remarkably stronger due to photoneutrons. Although being an insignificant part in the total neutron population during operation, the inherent neutron sources can be used as the installed neutron source after shutdown. If the MSR has continuously operated at full power(2 MWt) for 10 days,then there would be no need for the installed source within80 days after shutdown. After operating constantly for500 days, the installed neutron source can be eliminated within 2 years after shutdown. 展开更多
关键词 MSR Fuel salt Inherent neutron source Photoneutron Alpha-induced neutron
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Retrieval of inherent optical properties of the Yellow Sea and East China Sea using a quasi-analytical algorithm 认领 引用 被引量：8
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作者 青松 唐军武 +1 位作者 崔廷伟 张杰 《Chinese Journal of Oceanology and Limnology》 CSCD 2011年第1期33-45,共13页
We tested and modified the quasi-analytical algorithm （QAA） using 57 groups of field data collected in the spring of 2003 in the Yellow Sea and East China Sea. The QAA performs well in deriving total absorption coef... We tested and modified the quasi-analytical algorithm （QAA） using 57 groups of field data collected in the spring of 2003 in the Yellow Sea and East China Sea. The QAA performs well in deriving total absorption coefficients of typical coastal waters. The average percentage difference （APD） is in a range of 13.9%-38.5% for the total absorption coefficient （13.9% at 440 nm）, and differences in particle backscattering coefficient bbp（2） are less than 50% （in the case of the updated QAA）. To obtain improved results, we modified the QAA by adjusting the empirical relationships. The modified algorithm is then applied to the field data to test its performance. The APDs were 44.7%-46.6% for bbp（λ） and 9.9%-32.8% （9.9% at 555 nm） for the total absorption coefficient. This indicates that the modified QAA derives better results. We also used the modified model to derive phytoplankton pigment absorption （aph） and detritus and CDOM absorption （aug） coefficients. The APDs for aph and a dg at 440 nm are 37.1% and 19.8%. In this paper, we discuss error sources using the measured dataset. More independent field data can improve this algorithm and derive better results. 展开更多
关键词 inherent optical properties Yellow Sea and the East China Sea quasi-analytical algorithm
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Assessment of the contribution percentage of inherent soil productivity of cultivated land in China 认领 引用 被引量：1
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作者 WANG Shi-chao WANG Jin-zhou +4 位作者 ZHAO Ya-wen REN Yi XU Ming-gang ZHANG Shu-xiang LU Chang-ai 《Journal of Integrative Agriculture》 SCIE CAS CSCD 2019年第11期2619-2627,共9页
The contribution percentage of inherent soil productivity(CPISP)refers to the ratio of crop yields under no-fertilization versus under conventional fertilization with the same field management.CPISP is a comprehensive... The contribution percentage of inherent soil productivity(CPISP)refers to the ratio of crop yields under no-fertilization versus under conventional fertilization with the same field management.CPISP is a comprehensive measure of soil fertility.This study used 1086 on-farm trials(from 1984-2013)and 27 long-term field experiments(from 1979-2013)to quantify changes in CPISP.Here,we present CPISP3 values,which reflect the CPISP states during the first three years after site establishment,for a series of sites at different locations in China collected in 1984-1990(the 1980s),1996-2000(the 1990s),and 2004-2013(the 2000s).The results showed that the average CPISP3 value for three crops(wheat,rice,and maize)was 53.8%.Historically,the CPISP3 in the 1990s(57.5%)was much higher than those in the 1980s(50.3%),and the 2000s(52.0%)(P≤0.05).Long-term no-fertilization caused CPISP levels to gradually decline and then stabilize;for example,in a mono-cropping system with irrigation,the CPISP values in Northwest and Northeast China declined by 4.5 and 4.0%,respectively,each year for the first ten years,but subsequently,the CPISP values stabilized.In contrast,the CPISP for upland crops in double-cropping systems continued to decrease at a rate of 1.1%per year.The CPISP for upland-paddy cropping decreased very slowly(0.07%per year),whereas the CPISP for paddy cropping decreased sharply(3.1%per year,on average)for the first two years and then remained steady during the following years.Therefore,upland crops in double-cropping systems consume the most inherent soil productivity,whereas paddy fields are favourable for maintaining a high level of CPISP.Overall,our results demonstrate a need to further improve China’s CPISP3 values to meet growing productivity demands. 展开更多
关键词 crop yield inherent soil productivity typical cropping system planting years cropspecies
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Assessment of grid inherent vulnerability considering open circuit fault under potential energy framework 认领 引用 被引量：3
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作者 刘群英 刘起方 +1 位作者 黄琦 刘俊勇 《Journal of Central South University》 SCIE EI CAS 2010年第6期1300-1309,共10页
A potential energy framework for assessment of grid vulnerability was presented.In the framework,the branch potential energy function model was constructed.Two indexes,current vulnerability and forecasting vulnerabili... A potential energy framework for assessment of grid vulnerability was presented.In the framework,the branch potential energy function model was constructed.Two indexes,current vulnerability and forecasting vulnerability,were calculated.The current vulnerability was used to identify the current vulnerable area through calculating the distance between the current transmitted power and initial transmitted power;and the forecast vulnerability under variation of power injection was used to predict the vulnerable area of next step and verify the current vulnerable area.Numerical simulation was performed under variant operating conditions with IEEE-30 bus system,which shows that almost area of 90% overlaps between current vulnerable area and forecasting vulnerable area,the overlapped area is termed as inherent vulnerable area of grid.When considering N-1 contingency,the assessment results of this method proposed agree with those of optimal power flow.When considering N-2 contingency,optimal power flow fails to obtain correct results,while the method based on energy framework gives reliable results. 展开更多
关键词 inherent vulnerability branch potential energy （BPE） current vulnerability forecasting vulnerability phase angledifference
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One-step synthesis of inherently chiral p-tert-butylcalix[4]azacrown 认领 引用
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作者 Shao Yong Li Bei Sun +3 位作者 Zhi Chao Xiao Ming Hui Huang Wei Xue Xie Jun Min Liu 《Chinese Chemical Letters》 SCIE CAS 2009年第6期640-642,共3页
A one-step procedure is developed to synthesize inherently chiral p-tert-butylcalix[4]azacrown 1 through etherification between p-tert-butylcalix[4]arene and compound 3, which can be amplifed to efficiently prepare mo... A one-step procedure is developed to synthesize inherently chiral p-tert-butylcalix[4]azacrown 1 through etherification between p-tert-butylcalix[4]arene and compound 3, which can be amplifed to efficiently prepare more inherently cbiral calix[4]arenes in ABHH substitution pattern. 展开更多
关键词 arene Inherently chiral One-step
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Programming an efficient technique for designing smart C-doped MIC with dual self-protection forinformation and high-energy 认领 引用
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作者 Xiao-Gang Guo Tao-Tao Liang +5 位作者 Hui-Sheng Huang Bin-Fang Yuan Fu-Lan Zhang Yi-Huang Chen Lu Liu Xun Cui 《Rare Metals》 SCIE EI CAS CSCD 2024年第12期6694-6703,共10页
Constructing self-protected metastable intermolecular composites(MICs) enables the regulation of microstructures towards boosting controllable detonation performance,and also prevents information leakage,which is mean... Constructing self-protected metastable intermolecular composites(MICs) enables the regulation of microstructures towards boosting controllable detonation performance,and also prevents information leakage,which is meaningful but challenging.Herein,a convenient and efficient method of combining highly-controlled electrophoretic assembly,surface modification and microwave heat treatment was employed to design promising heattriggered wettability switchable high-energy smart C-doped Al/Cr2O3MIC,and surface modification mechanism was proposed,respectively.The anti-wetting ability of the product was demonstrated by a series of tests of water contact angle,impact resistance,immersion,selfcleaning,etc.The key information recording/encryption procedures were realized by constructing a hydrophilic/hydrophobic interface and adjusting the wettability of the product.In addition,the output heat of asobtained smart MIC can reach ~1.5 kJ·g-1,and its attenuation rate was only ~30% even after underwater aging,further verifying its potential practicality.Thus,our design provides a promising strategy for engineering smart MIC with diversified functional structures for blasting applications and beyond. 展开更多
关键词 High-energy MIC Information self-protection Exothermicity Stability
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An Inherent Chiral Calix[4]arene Bearing Chiral Groups without Forming Sub-ring 认领 引用
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作者 Xian Xian LIU Yan Song ZHENG Wan Ling MO 《Chinese Chemical Letters》 SCIE CAS 2006年第9期1169-1172,共4页
The NMR spectra revealed that the calixarene frame of 1, 3-disubstituted calix[4]arenes beating optically active groups is asymmetric, even without the formation of a sub-ring. This inherent chirality arises from the ... The NMR spectra revealed that the calixarene frame of 1, 3-disubstituted calix[4]arenes beating optically active groups is asymmetric, even without the formation of a sub-ring. This inherent chirality arises from the interaction of the two chiral groups, which hinder the substituents＇ free rotation. Thus, these chiral calix[4]arenes display good chiral recognition ability. 展开更多
关键词 Calixarene inherent chirality chiral recognition.
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Analysis of the Self-Protection Characteristics of a 1.5T Bitter-Like HTS Magnet Operated at 65K 认领 引用
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作者 Yan-Bing Hou Yin-Shun Wang +2 位作者 Chang-Tao Kan Xi Yuan Wei Pi 《Chinese Physics Letters》 SCIE EI CAS CSCD 2018年第6期79-83,共5页
We present a conceptual configuration of a high-temperature superconducting（HTS）magnet made from REBCO（Re=Rare Earth,B=Barium,C=Copper,O=Oxide）annular plates,called a Bitter-like HTS magnet,which can operate in pe... We present a conceptual configuration of a high-temperature superconducting（HTS）magnet made from REBCO（Re=Rare Earth,B=Barium,C=Copper,O=Oxide）annular plates,called a Bitter-like HTS magnet,which can operate in persistent current mode without joint resistance and can be excited by a flux pump and without current leads and a persistent power supply.An REBCO annular magnet which can generate 1.5 T corresponding to the operating current density 80%of critical current density of the magnet at an operating temperature of65 K is conceptually designed.Then the thermal stability of the magnet is numerically simulated by Comsol software.Whein a piece of RBCO annular plate quenches,the maximum released energy is its stored energy because each REBCO annular plate in the Bitter-like magnet is in parallel.To calculate the stored energy in the REBCO annular plate,the inductance of every annular plate,including self-inductance and mutual inductance,is calculated.Compared with the minimum quench energy（MQE）and stored energy in one REBCO annular plate,the stored energy in one REBCO annular plate is always smaller than the MQE,and the REBCO annular plate will not be damaged even though the stored energy in the REBCO annular plate is fully released,which indicates that this 1.5 T Bitter-like magnet has the property of self-protection. 展开更多
关键词 REBCO Analysis of the Self-Protection Characteristics of a 1.5T Bitter-Like HTS Magnet Operated at 65K HTS
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Distribution of Inherent Strains and Residual Stressesin Medium Thickness Plate Weldment 认领 引用
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作者 Peng HE and Jiuhai ZHANG National Key Laboratory of Advanced Welding Production Technology, HIT, Harbin 150001, China Toshio Terasaki and Testuya Akiyama Department of Materials Science and Engineering, Kyushu Institute of Technology, Japan 《Journal of Materials Science & Technology》 SCIE EI CAS 2001年第2期252-256,共5页
A fundamental theory for the analysis of residual welding stresses and deformation based on the inherent strain distribution along the welded joint is introduced. Distribution of inherent strains and longitudinal resi... A fundamental theory for the analysis of residual welding stresses and deformation based on the inherent strain distribution along the welded joint is introduced. Distribution of inherent strains and longitudinal residual stresses in medium thickness plate weldment is calculated and analyzed. A new method of calculating inherent strains and longitudinal residual stresses is proposed. 展开更多
关键词 In Distribution of Inherent Strains and Residual Stressesin Medium Thickness Plate Weldment Ta
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Development of index system for inherently safer process design using an integrated approach 认领 引用 被引量：4
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作者 Junjie Feng Bin Zhang +3 位作者 Wei Xu Bing Sun Fan Zhang Jie Jiang 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第11期2725-2733,共9页
With a growing population, an increasing number of petrochemical facilities are built with larger capacity and more complexity, which pose a great risk to assets, community and environment. The value of inherently saf... With a growing population, an increasing number of petrochemical facilities are built with larger capacity and more complexity, which pose a great risk to assets, community and environment. The value of inherently safer design is recognized with time by all stakeholders, and an effective tool is needed to evaluate and compare inherent safety of alternative technologies. This study developed a safety index to evaluate existing technologies for their safety levels and guide inherently safer design. The Integrated Risk-based Safety Index(IRSI) was developed based on a comprehensive review of petrochemical processes, incident cases from Sinopec and US Chemical Safety Board, and existing safety index systems. The IRSI included all major hazards, including fire, explosion,toxic release, dust explosion, physical explosion, and runaway. Also, the integrated life cycle approach considered chemical hazards, equipment failure rates and safety measures in this risk-based index. Advanced modeling techniques, PHAST simulation and Neural Network, were used in the development of three novel sub-indices in the projects, fire, explosion and toxic release. The index system could be easily incorporated into a user friendly tool for the ease of application. A case study of hydrogen dioxide was conducted using the IRSI, which showed its capability for evaluating the safety level of process facilities. 展开更多
关键词 Inherently safety Chemical process safety Integrated risk-based safety index PHAST Hydrogen dioxide
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Analysis of the Relationship Between the Meshing Stiffness and the Inherent Characteristics of Planetary Gear Transmission Mechanism 认领 引用 被引量：1
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作者 Qiang Zhang Rong He +1 位作者 Yudong Zhang Jin Xu 《Journal of Beijing Institute of Technology》 EI CAS 2019年第4期811-818,共8页
According to the relationship between the meshing stiffness and the inherent characteristics of a seven-speed three-row coupled planetary transmission mechanism,a equivalent concentrated mass dynamics model of the pla... According to the relationship between the meshing stiffness and the inherent characteristics of a seven-speed three-row coupled planetary transmission mechanism,a equivalent concentrated mass dynamics model of the planetary transmission mechanism is established.The natural frequency of the planetary gear train at a specific gear is calculated and extracted.The relationship between the meshing stiffness of each row and the natural frequency of the system is analyzed,thereby avoiding possible resonance behavior by changing the meshing stiffness.These results show that the meshing stiffness,in its range of possible values,has nearly no effect on the low order natural frequency(<4.000.Hz),and that the time-varying meshing stiffness mainly affects the natural frequencies of the higher-and middle-order parts of the system.Changes of the natural frequencies lead to the change of the system's corresponding vibration mode,which will change the vibration situation of the system. 展开更多
关键词 planetary transmission dynamics meshing stiffness inherent characteristics
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