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Journal of Rock Mechanics and Geotechnical Engineering 2020年第6期12卷 1333-1338页

作者： chen cui Ivan Gratchev School of Engineering Griffith UniversityGold CoastAustralia

This study aims to examine the influence of pre-existing discontinuities on the strengths of four natural rocks of different origins.A series of unconfined compression tests was performed on specimens of two types of sandstones,argillite and basalt that contain open and filled *** was found that the presence of cracks tends to decrease the overall strength for all studied rocks;however,the magnitude of strength reduction is related to the property of *** larger strength decrease was observed for the relatively harder argillite and basalt,compared to the softer *** was also found that the infill material could increase the strength of rock specimens,while the obtained strength depended on the characteristics of the fill material.

关键词： Pre-existing crack Rock strength Infill material Laboratory test

N-Derivations for Finitely Generated Graded Lie Algebras

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Algebra Colloquium 2016年第2期23卷 205-212页

作者： Haifeng Lian cui chen Department of Mathematics Fujian Agriculture and Forestry University Fuzhou 350002 China Department of Mathematics and Physics Fujian University of Technology Fuzhou 350108 China

The N-derivation is a natural generalization of derivation and triple derivation. Let L be a finitely generated Lie algebra graded by a finite-dimensional Cartan subalgebra. In this paper, a sufficient condition for the Lie N-derivation algebra of Lcoinciding with the Lie derivation algebra of L is given. As applications, any N-derivation of the SchrSdinger- Virasoro algebra, generalized Witt algebra, Kac-Moody algebra or their Borel subalgebra is a derivation.

关键词： derivation Cartan subalgebra Virasoro algebra Kac-Moody algebra

Lasry-Lions, Lax-Oleinik and generalized characteristics

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Science China Mathematics 2016年第9期59卷 1737-1752页

作者： chen cui chenG Wei Department of Mathematics Nanjing University

In the recent works, an intrinsic approach of the propagation of singularities along the generalized characteristics was obtained, even in global case, by a procedure of sup-convolution with the kernel the fundamental solutions of the associated Hamilton-Jacobi equations. In the present paper, we exploit the relations among Lasry-Lions regularization, Lax-Oleinik operators(or inf/sup-convolution) and generalized characteristics, which are discussed in the context of the variational setting of Tonelli Hamiltonian dynamics, such as Mather theory and weak KAM(Kolmogorov-Arnold-Moser) theory.

关键词： Hamilton-Jacobi equations weak KAM theory generalized characteristics

A Novel DIBR 3D Image Watermarking Algorithm Resist to Geometrical Attacks

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Chinese Journal of Electronics 2017年第6期26卷 1184-1193页

作者： WANG Shen cui chen NIU Xiamu School of Computer Science and Technology Harbin Institute of Technology

A histogram shape based method is utilized to design watermarking algorithm to protect the Depthimage-based rendering(DIBR) 3D images. To make the watermarking method robust to common attacks, much more suitable pixel groups are selected for watermark embedding which are insensitive to geometric attacks. Taking into account the adjusting of baseline distance in DIBR process might affect the watermarking extraction, a postprocessing is proposed after DIBR process to make the proposed watermarking method much more robust to DIBR process. As the experimental results shown, the proposed method is much more robust to the geometric attacks and combined attacks compared with existing methods. In addition, the proposed watermarking method also has good robustness to the adjusting of baseline distance and depth image blurred.

关键词： Depth-image-based rendering(DIBR) 3D image watermarking histogram Gaussian filtering

Convergence of the viscosity solution of non-autonomous Hamilton-Jacobi equations

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Science China Mathematics 2021年第8期64卷 1789-1800页

作者： cui chen Ya-Nan Wang Jun Yan The Faculty of Science Jiangsu UniversityZhenjiang 212013China School of Mathematical Sciences Nanjing Normal UniversityNanjing 210097China School of Mathematical Sciences Fudan UniversityShanghai 200433China Shanghai Key Laboratory for Contemporary Applied Mathematics Shanghai 200433China

In this paper,we investigate the non-autonomous Hamilton-Jacobi equation{ə_(t)u+H(t,x,ə_(x)=0,u(x,t)_(0))=φ(x),x∈M where H is 1-periodic with respect to t and M is a compact Riemannian manifold without *** obtain the viscosity solution denoted by T_(t_(0))^(t)φ(x)and show T_(t_(0))^(t)φ(x)converges uniformly to a time-periodic viscosity solution u^(*)(x,t)ofə_(t)u+H(t,x,ə_(x)u,u)=0.

关键词： Hamilton-Jacobi equation viscosity solution large-time behavior

The Neural Network-based Diagnostic Method for Atypical Faults in NPC Three-Level Inverter

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The Neural Network-based Diagnostic Method for Atypical Faul...

Detailed and clock-driven simulation for HPC interconnection network

第25届中国控制与决策会议

作者： cui chen Danjiang chen Yinzhong Ye Logistics Engineering College Shanghai Maritime University Zhejiang Wanli University Shanghai Institute of Technology

ISBN: (纸本)9781467355322

This paper presents a fault diagnosis method for a neutral point clamped （NPC） three-level inverter using BP neural network. As the fault mode occurring in one single power device has got a lot of attention, this paper focuses on the study of atypical faults. All possible open-circuit failures arising from two power devices on two cross bridge arms （atypical faults） are considered. Output voltages are used as measurement to classify the fault modes. The fault features are extracted from the output voltages by Fourier transform method and then used as the inputs of BP neural network which identifies the fault modes. Simulation results prove the feasibility of the diagnostic method and its good classification performance.

关键词： Fault Diagnosis BP Neural Network Neutral Point Clamped Three-level Inverter Atypical Fault

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Frontiers of Computer Science 2016年第5期10卷 797-811页

作者： Wenhao ZHOU Juan chen chen cui Qian WANG Dezun DONG Yuhua TANG State Key Laboratory of High Performance Computing School of Computer National University of Defense Technology Changsha 410073 China Science and Technology on Parallel and Distributed Processing Laboratory National University of Defense Technology Changsha 410073 China

Performance and energy consumption of high performance computing （HPC） interconnection networks have a great significance in the whole supercomputer, and building up HPC interconnection network simulation plat- form is very important for the research on HPC software and hardware technologies. To effectively evaluate the per- formance and energy consumption of HPC interconnection networks, this article designs and implements a detailed and clock-driven HPC interconnection network simulation plat- form, called HPC-NetSim. HPC-NetSim uses application- driven workloads and inherits the characteristics of the de- tailed and flexible cycle-accurate network simulator. Besides, it offers a large set of configurable network parameters in terms of topology and routing, and supports router＇s on/off states. We compare the simulated execution time with the real execution time of Tianhe-2 subsystem and the mean error is only 2.7%. In addition, we simulate the network behaviors with different network structures and low-power modes. The results are also consistent with the theoretical analyses.

关键词： high performance computing clock-driven sim-ulation interconnection network BookSim

A Study on the Cultivation of the Top Innovative Scientific Talents of Colleges and Their Values

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学术界 2016年第6期 257-262页

作者： Sun Yinghao cui chen School of Marxism Harbin University of Science and Technology Harbin Heilongjiang 150080

It is values that determine one’s future direction of *** young top innovative scientific talents are outstanding ones both in the scientific field and the youth,whose values not only determine their own future directions of development,but also the development and future of the whole *** order to cultivate their values,it is quite necessary to strengthen the thought guidance,develop the core socialist values,and adhere to morality education,down-to-earth practice,and the pursuit of ***,the individual development of the talents needs to be emphasized and their creativity needs to be *** synergistic functions of the organizations and departments should be given full play to in order to utilize the culture education strategy.

关键词：人才培养价值观创新型科研高校科学人才科技人才道德教育

Visualization of an Accelerated Electrochemical Reaction under an Enhanced Electric Field

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Research 2021年第1期2021卷 21-29页

作者： chen cui Rong Jin Dechen Jiang Jianrong Zhang Junjie Zhu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Locally enhanced electric fields produced by high-curvature structures have been reported to boost the charge transport process and improve the relevant catalytic ***,no visual evidence has been achieved to support this new electrochemical ***,accelerated electrochemiluminescence(ECL)reactions emitting light are visualized for the first time at the heterogeneous interfaces between microbowls and the supporting electrode *** simulation result shows that the electric intensity at the interface with a high curvature is 40-fold higher than that at the planar ***,local high electric fields concentrate reactive species to the heterogeneous interfaces and efficiently promote the charge transport reactions,which directly leads to the enhancement of ECL emission surrounding the ***,the potential to induce visual ECL from a ruthenium complex drops to 0.9 V,which further illustrates the promotion of an electrochemical reaction with the aid of an enhanced electric *** important visualization of electric field boosted electrochemical reactions helps to establish the proposed electron transfer mechanism and provide an alternative strategy to improve electrocatalytic efficiency.

关键词： surface. mechanism. field.

Automorphism Group and Representation of a Twisted Multi-loop Algebra

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Acta Mathematica Sinica,English Series 2010年第1期26卷 143-154页

作者： cui chen Hai Feng LIAN Shao Bin TAN Department of Mathematics and Physics Fujian University of Technology Fuzhou 350108 P. R. China Department of Computer and Information Fujian Agriculture and Forestry University Fuzhou 350002 P. R. China Department of Mathematics Xiamen University Xiamen 361005 P. R. China

Let G be the complexification of the real Lie algebra so（3） and A = C[t1^±1, t2^±1] be the Lau-ent polynomial algebra with commuting variables. Let L：（t1, t2, 1） = G c .A be the twisted multi-loop Lie algebra. Recently we have studied the universal central extension, derivations and its vertex operator representations. In the present paper we study the automorphism group and bosonic representations ofL（t1, t2, 1）.

关键词： Lie algebra automorphism group representation