检索结果-南通市图书馆

Chinese Physics Letters 1996年第8期13卷 565-567页

作者： wang Ke-lin wang mao-xi Center for Fundamental Physics University of Science and Technology of ChinaHefei 230026 Television University of Sichuan Chengdu 610072

With a new nonperturbative method,the problem of persistent currents in one-dimensional mesoscopic rings with consideration of electron-phonon coupling is exactly solved and the energy spectrum is *** result of this paper means that in the case of tight-binding model consideration of persistent currents can be treated separately from the interaction of electronphonon interaction.

关键词： interaction Electron exactly

Effects of Coupling Distance on Synchronization and Coherence in Chaotic Neural Networks

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2009年第7期52卷 81-84页

作者： wang mao-Sheng Department of Physics Anhui Normal University Wuhu 241000 China

Effects of coupling distance on synchronization and coherence of chaotic neurons in complex networks arenumerically *** find that it is not beneficial to neurons synchronization if confining the coupling distanceof random edges to a limit d_(max),but help to improve their ***,there is an optimal value of d_(max) atwhich the coherence is maximum.

关键词： synchronization coherence resonance neural network

Discrete sliding mode prediction control of uncertain switched systems

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2009年第5期20卷 1065-1071页

作者： He Zhaolan wang mao Liu Shuhuan Space Control and Inertial Technology Research Center Harbin Inst. of Technology Harbin 150001 P. R. China School of Atomation Harbin Univ. of Science and Technology Harbin 150080 P. R. China Control and Simulation Center Harbin Inst. of Technology Harbin 150001 P. R. China

The robust stabilization problem for a class of uncertain discrete-time switched systems is presented. A predictive sliding mode control strategy is proposed, and a discrete-time reaching law is improved. By applying a predictive sliding surface and a reference trajectory, combining with the state feedback correction and rolling optimization method in the predictive control strategy, a predictive sliding mode controller is synthesized, which guarantees the asymptotic stability for the closed-loop systems. The designed control strategy has stronger robustness and chattering reduction property to conquer with the system uncertainties. In addition, a unique nonswitched sliding surface is designed. The reason is to avoid the repetitive jump of the trajectories of the state components of the closed-loop system between sliding surfaces because it might cause the possible instability. Finally, a numerical example is given to illustrate the effectiveness of the proposed theory.

关键词： switched system sliding mode control predictive control rolling optimization.

Desulfurization ability of refining slag with medium basicity

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2014年第12期21卷 1160-1166页

作者： Hui-xiang Yu Xin-hua wang mao wang Wan-jun wang State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

The desulfurization ability of refining slag with relative lower basicity （B） and Al2O3 content （B = 3.5-5.0; 20wt%-25wt% Al2O3） was studied. Firstly, the component activities and sulfide capacity （Cs） of the slag were calculated. Then slag-metal equilibrium experiments were carried out to measure the equilibrium sulfur distribution （Ls）. Based on the laboratorial experiments, slag composition was optimized for a better desulfurization ability, which was verified by industrial trials in a steel plant. The obtained results indicated that an MgO-saturated CaO-Al2O3-SiO2-MgO system with the basicity of about 3.5-5.0 and the Al2O3 content in the range of 20wt%-25wt% has high activity of CaO （αCaO）, with no deterioration of Cs compared with conventional desulfurization slag. The measured Ls between high-strength low-alloyed （HSLA） steel and slag with a basicity of about 3.5 and an Al2O3 content of about 20wt% and between HSLA steel and slag with a basicity of about 5.0 and an Al2O3 content of about 25wt% is 350 and 275, respectively. The new slag with a basicity of about 3.5-5.0 and an Al2O3 content of about 20wt% has strong desulfurization ability. In particular, the key for high-efficiency desulfurization is to keep oxygen potential in the reaction system as low as possible, which was also verified by industrial trials.

关键词： high-strength steel low alloyed steel refining slag basicity desulfurization thermodynamic calculations

A New Solution of Einstein-Maxwell Equations

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 1999年第3期16卷 162-163页

作者： wang Yong-jiu LU mao-wang Institute of Physics Hunan Normal UniversityChangsha 410081

A new generation theorem of Einstein-Maxwell field is *** to it,a new solution of Einstein-Maxwell equations can be generated from a static vacuum *** with Schwarzschild solution,a new solution of the Einstein-Maxwell... 详细信息

关键词： solution. theorem. Einstein

Fault detection of switched linear systems with its application to turntable systems

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Systems Engineering and Electronics 2011年第1期22卷 120-126页

作者： Guanghui Sun mao wang Xiuming Yao Ligang Wu Space Control and Inertial Technology Research Center Harbin Institute of Technology Harbin 150001 E R. China

This paper is concerned with the H∞ fault detection for continuous-time linear switched systems with its application to turntable *** solvability condition for a desired filter is established based on the proposed sufficient *** on the double channel scheme of the turntable control system,the turntable system can be modeled as a switched ***,by taking the turntable system as a numerical example,the effectiveness of the proposed theory is well validated.

关键词： fault detection H∞ performance exponential stability switched system turntable system.

STEADY-STATE AND IDLE OPTIMIZA-TION OF INTERNAL COMBUSTION ENGINE CONTROL STRATEGIES FOR HYBRID ELECTRIC VEHICLES

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2008年第2期21卷 58-64页

作者： wang Feng mao Xiaojian YANG Lin ZHUO Bin School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200240 China

A novel steady-state optimization （SSO） of internal combustion engine （ICE） strategy is proposed to maximize the efficiency of the overall powertrain for hybrid electric vehicles, in which the ICE efficiency, the efficiencies of the electric motor （EM） and the energy storage device are all explicitly taken into account. In addition, a novel idle optimization of ICE strategy is implemented to obtain the optimal idle operating point of the ICE and corresponding optimal parking generation power of the EM using the view of the novel SSO of ICE strategy. Simulations results show that potential fuel economy improvement is achieved relative to the conventional one which only optimized the ICE efficiency by the novel SSO of ICE strategy, and fuel consumption per voltage increment decreases a lot during the parking charge by the novel idle optimization of ICE strategy.

关键词： Hybrid electric vehicle Internal combustion engine Steady-state optimization Idle optimization Energy conversion

Further control synthesis for time-delay systems with actuator saturation

在线全文

学校读者我要写书评

暂无评论

控制理论与应用（英文版） 2013年第1期11卷 128-131页

作者： mao wang Yue GU Xianwei LI Space Control and Inertial Technology Research Center Harbin Institute of Technology Shanghai Aerospace Control Engineering Institute

This paper is concerned with the control synthesis problem for systems with time-varying delay and actuator saturation. A new controller design method is proposed in which auxiliary feedback matrix method is adopted to handle the saturation term in the system. The improvement of the proposed method lies in the application of delay partitioning idea to further enlarge the estimated domain of attraction. All the results are given in terms of linear matrix inequalities. Finally, a numerical example is provided to demonstrate the effectiveness and superiority of our obtained results.

关键词： Time-delay systems Actuator saturation Attraction domain Delay partitioning

The role of cell mediated immunopathogenesis in thyroid-associated ophthalmopathy

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2019年第7期12卷 1209-1214页

作者： Zhen-mao wang Zheng-Yan wang Yan Lu Joint Shantou International Eye Center of Shantou University and the Chinese University of Hong Kong Shantou 515000 Guangdong ProvinceChina The People's Hospital of Xintai Xintai 271200 Shandong ProvinceChina Department of Ophthalmology Jinling Hospital School of Medicine Nanjing University Nanjing 210002 Jiangsu Province China

Currently, thyroid-associated ophthalmopathy (TAO) lacks effective treatment due to our lack of clarity in its immunopathogenesis. Orbital fibroblasts play a key role in altering inflammation and immune response in TAO, and are considered as the key target and effector cells in its pathogenesis. The orbit infiltrating CD34+ fibrocytes add on to the process by expressing high levels of autoantigens and inflammatory cytokines, while also differentiating into myofibroblasts or adipocytes. This review focuses on the role of orbital fibroblasts and CD34+ fibrocytes in the pathogenesis of TAO, highlighting the basis of emerging treatments.

关键词： thyroid-associated ophthalmopathy orbital fibroblast fibrocytes immunopathogenesis

New Approach to Stability Analysis and Stabilization of Discrete-Time T-S Fuzzy Descriptor Systems

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2015年第5期22卷 55-60页

作者： mao wang Jia Shi Kan Liu Space Control and Inertial Technology Research Center Harbin Institute of Technology

The problems of stability and state feedback control for a class of discrete-time T-S fuzzy descriptor systems are investigated in this paper. Based on fuzzy Lyapunov function,a set of slack variables is introduced to remove the basic semi-definite matrix inequality condition to check the regularity,causality and stability of discrete-time T-S fuzzy descriptor systems; a new sufficient condition for the discrete-time T-S fuzzy descriptor systems to be admissible is proposed in terms of strict linear matrix inequalities( LMIs). And a sufficient condition is proposed for the existence of state feedback controller in terms of a set of coupled strict ***,an illustrative example is presented to demonstrate the effectiveness of the proposed approach.

关键词： T-S fuzzy descriptor systems parameter uncertainties stability state feedback control linear matrix inequality(LMI)