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Variation of cavity gas pressure in slopes with weak intercalation under seismic load

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Journal of Mountain Science 2016年第2期13卷 352-360页

作者： WANG Xiao-qun CHEN Zhen-lin zhou zhou SHEN Man State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology

This study discussed how cavity gas pressure affects the stability of rock mass with fractures under well controlled laboratory ***-created void space created and the induced gas pressures have been the focus of active researches because they are associated with fast movement of large-scale landslides.A shaking table experiment was set up to mimic weak-intercalated rock slope under seismic *** cavity gas pressure would be produced in weak spots upon a sudden vibration *** drastically elevated gas pressure is believed to be responsible for the creation of cavities surrounding the tension *** dissipation of the excessive cavity gas pressure,the fractures are in unbounded *** observation explains that the slope body would be split and loosened under several aftershocks,and with the expanding of the cracks,the slope failure eventually *** research of the mechanism of cavity gas pressure could provide a novel insight into the formation mechanism of landslides under seismic load and has implications for the disaster prevention and control theory for the slope stability evaluation.

关键词： Landslide Fracture Deformation Weak intercalation Cavity gas pressure

PARALLEL COMPUTATION AND DOMAIN DECOMPOSITION FOR A CLASS OF HYPERBOLIC PROBLEMS

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Systems Science and Mathematical Sciences 1995年第2期8卷 97-101页

作者： lin qun YAN Ningning zhou aihui(Institute of Systems Science, Academia Sinica,Beijing 100080,China) 中科院系统科学所北京

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关键词： Parallel computation domain decomposition finite element method hyperbolic problem

The Study of Group Scheduling Problems with General Dual-Position-Based Job Processing Times

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Journal of the Operations Research Society of China 2017年第4期5卷 509-527页

作者： Xian-Yu Yu De-qun zhou Yu-lin Zhang College of Economics and Management Nanjing University of Aeronautics and AstronauticsNanjing 211106China School of Economics and Management Southeast UniversityNanjing 210096China

Scheduling with group technology has been a vivid research area in the past ***,group technology with general dual-effect variable processing times needs to be further explored although this kind of group technology plays an important role in some actual manufacturing ***,this paper considers group scheduling problems with a kind of general group variable processing times model,where the actual processing time of each job in group is variable due to the dual effect of both the job position and the group *** objectives of two types of considered problems are to minimize the makespan and the total completion time,*** on the decomposition analysis,the mathematical logic analysis and the computational complexity proof,it is obtained that the makespan minimization problem and the total completion time minimization problem are both polynomially solvable under the condition that the group number is *** three special cases of considered problems,polynomial solving algorithms with lower computational complexity are proposed.

关键词： Group scheduling Single machine Dual position based Computational analysis

ON THE CONVERGENCE OF THE NONNESTED V-CYCLE MULTIGRID METHOD FOR NONSYMMETRIC AND INDEFINITE SECOND-ORDER ELLIPTIC PROBLEMS

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Journal of Computational Mathematics 2006年第2期24卷 157-168页

作者： Huo-yuan Duan qun lin LSEC ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

This paper provides a proof for the uniform convergence rate （independently of the number of mesh levels） for the nonnested V-cycle multigrid method for nonsymmetric and indefinite second-order elliptic problems.

关键词： Nonnested V-cycle multigrid method Second-order elliptic problems.

Dynamic Mechanical Behavior and Prediction for PP/POE Blends

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Chemical Research in Chinese Universities 2009年第4期25卷 573-578页

作者： YING Ji-ru XIE Xiao-lin zhou Xing-ping zhou Hua-min LI De-qun State Key Laboratory of Plastic Forming Simulation and Die ＆ Mould Technology Wuhan 430074 P. R. China Hubei Key Laboratory of Materials Chemistry and Service Failure Department of Chemistry and Chemical Engineering Huazhong University of Science and Technology Wuhan 430074 P. R. China School of Chemical and Environmental Engineering Hubei University of Technology Wuhan 430068 P. R. China

Polypropylene（PP）/ethylene-octene copolymer（POE） blends were prepared with a twin-screw *** dynamic mechanical behavior were systematically *** results show that PP/POE blends are heterogeneities with a partial compatible two-phase structure,the glass transition temperature of PP phases in the blends tends to shift towards high temperature with increasing the POE content,and the glass transition temperature of POE phases shifts towards the low temperature with increasing the PP *** Kerner＇s dispersed phase model and co-continuous phase model can reasonably predict the visco-elasticity of PP/POE blends with different ***,the morphological structure of the blends can be estimated via comparing the predicted DMA behavior with the experimental data.

关键词： PP/POE blend Dynamic mechanical behavior Dispersed phase model Co-continuous phase model

A SUPERONVERGENCE ANALYISIS FOR FINITE ELEMENT SOLUTION BY THE INTERPOLANT POSTPROCESSING ON IRREGULAR MESHES FOR SMOOTH PROBLEM

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Journal of Computational Mathematics 2001年第3期19卷 323-326页

作者： Qi-ding Zhu qun lin Institute of Science Hunan Normal UniversityChangsha 410081China Institute of System Academy of Mathematics and Systems SciencesChinese Academy of SciencesBeijing 100080China

The post-processing procedure is given by a interpolant postprocessing of the finit element solution by appropriately-define finite dimensional subspaces, The corresponding superconvergence are established on general ... 详细信息

关键词： finite element superconvergence interpolant postprocessing

On s-uniform property of compressing sequences derived from primitive sequences modulo odd prime powers

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Science China(Information Sciences) 2017年第5期60卷 84-95页

作者： Yupeng JIANG qun-Xiong ZHENG Dongdai lin State Key Laboratory of Information Security Institute of Information EngineeringChinese Academy of Sciences State Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou Information Science and Technology Institute

Let Z/（p;） be the integer residue ring modulo pewith p an odd prime and e 2. We consider the suniform property of compressing sequences derived from primitive sequences over Z/（p;）. We give necessary and sufficient conditions for two compressing sequences to be s-uniform with α provided that the compressing map is of the form φ(x;, x;,..., x;) = g(x;) + η(x;, x;,..., x;), where g(x;) is a permutation polynomial over Z/（p） and η is an（e-1）-variable polynomial over Z/（p）.

关键词： compressing map linear recurring sequence primitive sequence permutation polynomial s uniform

An Acceleration Method for Stationary Iterative Solution to linear System of Equations

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Advances in Applied Mathematics and Mechanics 2012年第4期4卷 473-482页

作者： qun lin Wujian Peng Academy of Math and System Sciences Chinese Academy of SciencesInstitute Computational MathematicsBeijing 100190China School of Mathematics and Information Sciences Zhaoqing UniversityZhaoqingGuangdong 526061China

An acceleration scheme based on stationary iterative methods is presented for solving linear system of *** Chebyshev semi-iterative method which requires accurate estimation of the bounds for iterative matrix eigenvalues,we use a wide range of Chebyshev-like polynomials for the accelerating process without estimating the bounds of the iterative matrix.A detailed error analysis is presented and convergence rates are *** experiments are carried out and comparisons with classical Jacobi and Chebyshev semi-iterative methods are provided.

关键词： Iterative method error analysis recurrence

Delivery of CatSper2 siRNA into Rat Sperms by Electroporation Repressed Ca^(2+) Influx During Sperm Hyperactivation

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Agricultural Sciences in China 2011年第12期10卷 1958-1967页

作者： ZHANG Zhen zhou Xuan LI Hui-xia CUI qun-wei YU Jing WANG Gen-lin College of Animal Science and Technology Nanjing Agricultural University Nanjing 210095 PR.China

CatSper is a unique Ca2＋ channel-like protein family exclusively expressed in the testis and sperm, and plays important roles in sperm motility, capacitation, acrosome reaction and sperm-egg interactions. Here we studied the mechanism of regulation of CatSper2-dependent Ca〉 influx, extracellular and intracellular Ca2＋on sperm hyperactivated motility. The siRNA duplexes were transfected into the sperm cells by electroporation （EP） to silence the expression of CatSper2. The results for targeted disruption of CatSper2 showed the highest silence efficiency 77.7% （P〈0.05）, the hyperactivated sperm rate calculated by computer-assisted semen analysis （CASA） analysis of interferenced sperm was significantly lower 11.1% than the control 99.2%. Flow cytometry （FCM） detection of the intracellular Ca2＋ concentration of interferenced sperm was 50 nmol L-t higher than the normal. It was remarkably lower than hyperactivated sperm with 200-1 000 nmol L-1 （P〈0.05）. It was not sufficient to evoke hyperactivation. To trigger hyperactivation, the sperm were incubated in 50 pmol L-t thimerosal or 5 mmol L-1 procaine, it sharply increased the intracellular Ca2＋ via two different channels. CASA and FCM detection indicated that intracellular Ca〉 is required for initiating hyperactivation while extracellular Ca2＋ is essential to maintain the process. We concluded that to mediate sperm hyperactivation, it is essential to inhibit Ca〉peak present with targeted disruption of CatSper2 expression. This provides important prospective for further exploration of signal channel of sperm hyperactivated motility, potential factors for male infertility and provide further reference to the exploration of male contraceptive drug targets of male reproduction.

关键词： sperm hyperactivation motility CatSper2 Ca2+ channel RNAi electroporation (EP)