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Empirical Study of Coping Strategies for Computer-Related Technostress of Chinese Employees

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Tsinghua Science and Technology 2005年第Z1期10卷 753-760页

作者： wanG Kanliang shu qin TU Qiang School of Management Xi'an Jiaotong University Xi'an 710049 China School of Management Xi'an Jiaotong University Xi'an 710049 China College of Business Rochester Institute of Technology Rochester NY 14623 USA

Technostress is defined as "any negative impact on attitudes, thoughts, behaviors, or body psychology caused directly or indirectly by technology". With the rapid diffusion and penetration of information and communication technology, computer-related technostress attracts more and more attention from academic and professional fields. Based on the analysis of the inhibitors of the computer-related technostress, this paper proposes a conceptual framework of the impacts of inhibitors on computer-related technostress. Then a survey was conducted, data was processed and analyzed using SPSS and LISREL. The result shows that an improved training utility in computer technology,efficient technology-end-user help-desk will help to alleviate computer-related technostress.

关键词： technostress computer technology coping strategy

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局部对比度融合重加权的红外图像小目标检测

电光与控制 2025年第1期32卷 27-33页

作者：霍贝祺陈文东杨赟秀刘星舒勤四川大学电气工程学院成都610000 北京遥感设备研究所北京100000 西南技术物理研究所成都610000

红外图像块小目标检测算法在数据链、预警、制导等领域有较为广泛的应用,如利用数据链可以将红外图像块小目标精确传送给雷达。为了在复杂背景条件下进一步提高红外小目标检测的效果,提出了一种重加权和局部先验融合的红外图像块(IPI)... 详细信息

红外图像块小目标检测算法在数据链、预警、制导等领域有较为广泛的应用,如利用数据链可以将红外图像块小目标精确传送给雷达。为了在复杂背景条件下进一步提高红外小目标检测的效果,提出了一种重加权和局部先验融合的红外图像块(IPI)小目标检测算法。首先,采用加权Schatten p范数对背景图像块进行约束;其次,引入局部对比度先验信息和加权l_(1)范数抑制非目标稀疏点,进一步增强目标图像稀疏性,使算法模型性能进一步得到提升。仿真结果表明,所提算法在抑制背景杂波和精确检测目标方面均有较好的结果,优于现有经典算法。

关键词：目标检测红外小目标稀疏低秩分解红外图像块

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Price-Based Residential Demand Response Management in Smart Grids:A Reinforcement Learning-Based Approach

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IEEE/CAA Journal of Automatica Sinica 2022年第1期9卷 123-134页

作者： Yanni wan Jiahu qin Xinghuo Yu Tao Yang Yu Kang Department of Automation University of Science and Technology of ChinaHefei 230027China Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei 230088China School of Engineering RMIT UniversityVIC 3000Australia State Key Laboratory of Synthetical Automation for Process Industries Northeastern UniversityShenyang 110819China Department of Automation State Key Laboratory of Fire ScienceInstitute of Advanced TechnologyUniversity of Science and Technology of ChinaHefei 230027China Key Laboratory of Technology in Geo-Spatial Information Processing and Application Systems Chinese Academy of SciencesBeijing 100190China

This paper studies price-based residential demand response management(PB-RDRM)in smart grids,in which non-dispatchable and dispatchable loads(including general loads and plug-in electric vehicles(PEVs))are both *** PB-RDRM is composed of a bi-level optimization problem,in which the upper-level dynamic retail pricing problem aims to maximize the profit of a utility company(UC)by selecting optimal retail prices(RPs),while the lower-level demand response(DR)problem expects to minimize the comprehensive cost of loads by coordinating their energy consumption *** challenges here are mainly two-fold:1)the uncertainty of energy consumption and RPs;2)the flexible PEVs’temporally coupled constraints,which make it impossible to directly develop a model-based optimization algorithm to solve the *** address these challenges,we first model the dynamic retail pricing problem as a Markovian decision process(MDP),and then employ a model-free reinforcement learning(RL)algorithm to learn the optimal dynamic RPs of UC according to the loads’*** proposed RL-based DR algorithm is benchmarked against two model-based optimization approaches(i.e.,distributed dual decomposition-based(DDB)method and distributed primal-dual interior(PDI)-based method),which require exact load and electricity price *** comparison results show that,compared with the benchmark solutions,our proposed algorithm can not only adaptively decide the RPs through on-line learning processes,but also achieve larger social welfare within an unknown electricity market environment.

关键词： Demand response management(DRM) Markovian decision process(MDP) Monte Carlo simulation reinforcement learning(RL) smart grid

Microstructure,Tensile Properties and Heat Treatment Process of Spray Formed FGH95 Superalloy

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Journal of Iron and Steel Research International 2013年第4期20卷 59-63页

作者： XU Yi GE Chang-chun shu qin School of Materials Science and Engineering Southwest Jiaotong University Institute of Special Ceramics and Powder Metallurgy University of Scienceand Technology Beijing

The potential of spray forming for microstructural refining can be attractive to the production of superalloys.A200mm spray formed FGH95superalloy round billet that was produced using a single atomizer has considerably homogeneous,small,equiaxed *** measured oxygen content is 2×10-5,and the measured porosity is only 0.6%.The achieved yield of deposit is in a good range of about 73.6%.The microstructure and tensile properties of nickel-based spray formed FGH95superalloy are ***,effects of heat treatment on microstructure were *** results show that the spray formed FGH95superalloy has higher isotropy in tensile property due to itsγ′phase homogeneous distribution and less defects in the *** processing procedures,the different heat treatment processes affect the microstructure andγ′phase homogeneous distribution of spray formed FGH95superalloy.

关键词： spray forming FGH95superalloy isotropy γ′

Decay Rate of Quasilinear Wave Equation with Viscosity

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Acta Mathematicae Applicatae Sinica 2012年第3期28卷 591-596页

作者： Yu-ming qin Xin LIU shu-xian DENG Department of Applied Mathematics College of SciencesDonghua UniversityShanghai 201620China College of Information Sciences and Technology Donghua UniversityShanghai 201620China

This paper is concerned with the decay rate of solutions for a quasilinear wave equation with viscosity. We use a so-called energy perturbation method to establish decay rate of solutions in terms of energy norm for a class of nonlinear functions. With the help of a comparison lemma of differential inequalities, we establish a relationship between decay rate of solutions and f.

关键词： decay rate energy inequality quasilinear wave equation

Further insight into reproductive incompatibility between putative cryptic species of the Bemisia tabaci whitefly complex

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Insect Science 2016年第2期23卷 215-224页

作者： Li qin Li-Long Pan shu-Sheng Liu Ministry of Agriculture Key Laboratory of Agricultural Entomology Institute of Insect Sciences Zhejiang University Hangzhou China

The whitefly Bemisia tabaci （Gennadius）（Hemiptera： Aleyrodidae）, with its global distribution and extensive genetic diversity, is now known to be a complex of over 35 cryptic species. However, a satisfactory resolution of the systematics of this species complex is yet to be achieved. Here, we designed experiments to examine reproductive compatibility among species with different levels of mitochondrial cytochrome oxidase I （mtCOI） divergence. The data show that putative species with mtCOI divergence of 〉 8% between them consistently exhibited complete reproductive isolation. However, two of the putative species, Asia II 9 and Asia II 3, with mtCOI divergence of 4.47% between them, exhibited near complete reproductive compatibility in one direction of their cross, and partial reproductive compatibility in the other direction. Together with some recent reports on this topic from the literature, our data indicates that, while divergence in the mtCOI sequences provides a valid molecular marker for species delimitation in most clades, more genetic markers and more sophisticated molecular phylogeny will be required to achieve adequate delimitation of all species in this whitefly complex. While many attempts have been made to examine the reproductive compatibility among genetic groups of the B. tabaci complex, our study represents the first effort to conduct crossing experiments with putative species that were chosen with considerations of their genetic divergence. In light of the new data, we discuss the best strategy and protocols to conduct further molecular phylogenetic analysis and crossing trials, in order to reveal the overall pattern of reproductive incompatibility among species of this whitefly complex.

关键词： crossing experiment genetic diversity mitochondrial COI reproductiveisolation systematics whitefly

A Variant Constrained Genetic Algorithm for Solving Conditional Nonlinear Optimal Perturbations

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Advances in Atmospheric Sciences 2014年第1期31卷 219-229页

作者： ZHENG qin SHA Jianxin shu Hang LU Xiaoqing Institute of Science PLA University of Science and Technology State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Troop 94906 People's Liberation Army

A variant constrained genetic algorithm （VCGA） for effective tracking of conditional nonlinear optimal perturbations （CNOPs） is presented. Compared with traditional constraint handling methods, the treatment of the constraint condition in VCGA is relatively easy to implement. Moreover, it does not require adjustments to indefinite pararneters. Using a hybrid crossover operator and the newly developed multi-ply mutation operator, VCGA improves the performance of GAs. To demonstrate the capability of VCGA to catch CNOPS in non-smooth cases, a partial differential equation, which has ＂on off＂ switches in its forcing term, is employed as the nonlinear model. To search global CNOPs of the nonlinear model, numerical experiments using VCGA, the traditional gradient descent algorithm based on the adjoint method （ADJ）, and a GA using tournament selection operation and the niching technique （GA-DEB） were performed. The results with various initial reference states showed that, in smooth cases, all three optimization methods are able to catch global CNOPs. Nevertheless, in non-smooth situations, a large proportion of CNOPs captured by the ADJ are local. Compared with ADJ, the performance of GA-DEB shows considerable improvement, but it is far below VCGA. Further, the impacts of population sizes on both VCGA and GA-DEB were investigated. The results were used to estimate the computation time of ~CGA and GA-DEB in obtaining CNOPs. The computational costs for VCGA, GA-DEB and ADJ to catch CNOPs of the nonlinear model are also compared.

关键词： genetic algorithm conditional nonlinear optimal perturbation "on-off" switch adjoint rrtethod

Determination of minimum cover depth for shallow tunnel subjected to water pressure

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Journal of Central South University 2013年第8期20卷 2307-2313页

作者： HUANG Fu qin Chang-bing LI shu-cai School of Civil Engineering and Architecture Changsha University of Science and Technology Changsha 410004 China School of Civil Engineering Central South University Changsha 410075 China Geotechnical and Structural Engineering Research Center Shandong University Jinan 250061 China

Prediction of the state of roof collapse is a big challenge in tunnel engineering, while the limit analysis theory makes it possible to derive the analytical solutions of the collapse mechanisms. In this work, an exact solution of collapsing shape in shallow underwater tunnel is obtained by using the variation principle and the upper bound theorem based on nonlinear failure criterion. Numerical results under the effect of river water and supporting pressure are derived and discussed. The maximum water depth above the river bottom surface is determined under a given buried depth of shallow cavities and the critical depth of roof collapse is obtained under a constant river depth. In comparison with the previous results, the present solution shows a good agreement with the practical results.

关键词： shallow underwater subway roof collapse nonlinear failure criterion

Numerical analysis of the correlation between fluid dynamic modes and hydrodynamic noise in flows around a three-dimensional circular cylinder

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Journal of Hydrodynamics 2024年第1期36卷 119-129页

作者： Jia-jia qin Ming-xin Zou Yuan Zhuang De-cheng wan Computational Marine Hydrodynamics Lab(CMHL) School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China Wuhan Second Ship Design and Research Institute Wuhan430205China

The flow around a circular cylinder for Re=1000 is characterized by flow separation and Karman vortex *** typical flow features can be captured to study the correlation between fluid fields and sound *** this paper,the three-dimensional circular cylinder is taken as the research object,and the probes of surface fluctuating pressure and far field sound pressure are arranged every 10°.The directional diagram and the coherence of fluctuating pressure and sound pressure are *** relationship between the flow mode and hydrodynamic noise is studied by using dynamic mode decomposition(DMD).The characteristics of the dipole and quadrupole sound source term of a long span cylinder are *** results show that at the angles between 30°–120°and 190°–350°,the fluctuating pressure contributes more to the generation of dipole *** quadrupole sound source shows three-dimensional effects,which is more obvious in a cylinder with large spanwise length.

关键词： Pressure coherence dynamic mode decomposition flow-sound correlation circular cylinder