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MATHER SETS FOR SUBLINEAR DUFFING EQUATIONS

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Chinese Annals of Mathematics,Series B 1994年第4期15卷 421-434页

作者： qian dingbian(Department of Mathematics, suzhou university, 2.5006, china.) 苏州大学数学系江苏苏州 215006

The existence of Mather sets(generalized quasiperiodic solutions and uNlinked periodicsolutions)for sublinear Duffing equations is shown. Here the approach is based on the use ofaction-angle variables and the applicat... 详细信息

关键词： Sublinear Duffing equation Finite twist Aubry-Mather theorem Mather sets.

Recent advancements in noble-metal electrocatalysts for alkaline hydrogen evolution reaction

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Chinese Chemical Letters 2025年第1期36卷 176-200页

作者： Guoliang Gao Guangzhen Zhao Guang Zhu Bowen sun Zixu sun Shunli Li Ya-qian Lan Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes Suzhou UniversitySuzhou 234000China Key Laboratory for Special Functional Materials of Ministry of Education School of Materials Science and EngineeringHenan UniversityKaifeng 475004China school of Chemistry South China Normal UniversityGuangzhou 510006China

Available online Alkaline water electrolysis(AWE)is a prominent technique for obtaining a sustainable hydrogen source and effectively managing the energy *** metal-based electrocatalysts,owing to their exceptional hydrogen binding energy,exhibit remarkable catalytic activity and long-term stability in the hydrogen evolution reaction(HER).However,the restricted accessibility and exorbitant cost of noble-metal materials pose obstacles to their extensive adoption in industrial *** review investigates strategies aimed at reducing the dependence on noble-metal electrocatalysts and developing a cost-effective alkaline HER catalyst,while considering the principles of sustainable *** initial discussion covers the fundamental principle of HER,followed by an overview of prevalent techniques for synthesizing catalysts based on noble metals,along with a thorough examination of recent *** subsequent discussion focuses on the strategies employed to improve noble metalbased catalysts,including enhancing the intrinsic activity at active sites and increasing the quantity of active ***,this investigation concludes by examining the present state and future direction of research in the field of electrocatalysis for the HER.

关键词： Hydrogen evolution reaction Alkaline water electrolysis Electrocatalysts Noble metal-based Synthesis method Modification strategy

Finite groups in which elements of the same order outside the center are conjugate

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Science china Mathematics 2007年第10期50卷 1493-1500页

作者： Xing-zhong YOU~1 Guo-hua qian~2 Wu-jie SHI~(3+) ~1 school of Mathematics and Computing Science,Changsha university of Science and Technology,Changsha 410076,china ~2 Department of Mathematics,Changshu Institute of Technology,Changshu 215500,china ~3 school of Mathematics,suzhou university,suzhou 2.5006,china 1. school of Mathematics and Computing Science Changsha University of Science and Technology Changsha 410076 China 2. Department of Mathematics Changshu Institute of Technology Changshu 215500 China 3. school of Mathematics Suzhou University Suzhou 215006 China

We prove that if G is a finite group in which the elements of the same order outside the center are conjugate, then either G is abelian or G ≌ S3.

关键词： finite group, rational group, conjugacy class

High peak power mini-array quantum cascade lasers operating in pulsed mode

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Chinese Physics B 2025年第1期34卷 339-342页

作者： Yuhang Zhang Yupei Wang Xiaoyue Luo Chenhao qian Yang Cheng Wu Zhao Fangyuan sun Jun Wang Zheng-Ming sun Southeast university-Monash university Joint Graduate school(suzhou) Southeast UniversitySuzhou 215125China school of Materials Science and Engineering Southeast UniversityNanjing 211189China College of Electronics and Information Engineering Sichuan UniversityChengdu 610065China Huaiyin Institute of Technology Huaian 223003China suzhou Everbright Photonics Co. Ltd.Suzhou 215163China

Broad area quantum cascade lasers(BA QCLs)have significant applications in many areas,but suffer from demanding pulse operating conditions and poor beam quality due to heat accumulation and generation of high order modes.A structure of mini-array is adopted to improve the heat dissipation capacity and beam quality of BA *** active region is etched to form a multi-emitter and the channels are filled with In P:Fe,which acts as a lateral heat dissipation channel to improve the lateral heat dissipation efficiency.A device withλ~4.8μm,a peak output power of 122 W at 1.2%duty cycle with a pulse of 1.5μs is obtained in room temperature,with far-field single-lobed *** result allows BA QCLs to obtain high peak power at wider pump pulse widths and higher duty cycle conditions,promotes the application of the mid-infrared laser operating in pulsed mode in th e field of standoff photoacoustic chemical detection,space optical communication,and so on.

关键词： quantum cascade laser mini-array thermal management

Configuration Selection for Reconfigurable Manufacturing Systems by Means of Characteristic State Space

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Chinese Journal of Mechanical Engineering 2011年第1期24卷 23-32页

作者： HUANG Liang GAO Yuan qian Feng TANG suzhou WANG Delun school of Mechanical Engineering Dalian University of Technology Dalian 116021 China

The configuration selection for reconfigurable manufacturing systems（RMS） have been tackled in a number of studies by using analytical or simulation models. The simulation models are usually based on fewer assumptions than the analytical models and therefore are more wildly used in modeling complex RMS. But in the absence of an efficient gradient analysis method of the objective function, it is time-consuming in solving large-scale problems by using a simulation model coupled with a meta-heuristics algorithm. In this paper, a new approach by means of characteristic state space is presented to improve the efficiency of the configuration selection for an RMS. First, a characteristic state equation is set up to represent the input and the output resources of each basic activity in an RMS. A production process model in terms of matrix equations is established by iterating the equations of basic activities according to the resource flows. This model introduces the production process into a characteristic state space for further analysis. Second, the properties of the characteristic state space are presented. On the basis of these properties, the configuration selection in an RMS is considered as a path-planning problem, and the gradient of the objective function is computed. Modified simulated annealing（SA） is also presented, in which neighborhood generation is guided by the gradient to accelerate convergence and reduce the run time of the optimization procedure. Finally, several case studies on the configuration selection for some actual reconfigurable assembly job-shops are presented and compared to the classical SA. The comparison shows relatively positive results. This study provides a more efficient configuration selection approach by using the gradient of the objective function and presents the relevant theories on which it is based.

关键词： reconfigurable manufacturing system configuration selection characteristic state space simulated annealing

具有一类几何条件的对称Duffing方程(英文)

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苏州大学学报（自然科学版） 1999年第4期15卷 1-7页

作者：钱定边苏州大学数学科学学院苏州215006

本文讨论了具有偶或奇对称性的Ｄｕｆｆｉｎｇ方程，在由Ｃａｐｉｅｔｔｏ，Ｍａｗｈｉｎ和Ｚａｎｏｌｉｎ给出的几何条件下，我们证明了具有振动非线性的对称Ｄｕｆｆｉｎｇ方程有无穷多个对称的次调和解，并且其次调和解具有某种稠密... 详细信息

本文讨论了具有偶或奇对称性的Ｄｕｆｆｉｎｇ方程，在由Ｃａｐｉｅｔｔｏ，Ｍａｗｈｉｎ和Ｚａｎｏｌｉｎ给出的几何条件下，我们证明了具有振动非线性的对称Ｄｕｆｆｉｎｇ方程有无穷多个对称的次调和解，并且其次调和解具有某种稠密的分布。

关键词：几何条件次调和解对称杜芬方程杜芬方程

Optimization for design of progressive addition lenses

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Optimization for design of progressive addition lenses

Entangled coherent states:generation

中国光学学会2011年学术大会

作者： Wu Quanying *a Tang Yunhai a,b qian Lin a,b Liu Lin b a school of Mathematics and Physics,suzhou university of Science and Technology,suzhou,215009,china b school of Phys Sci&Tech,Soochow university,suzhou,2.5006,china

Progressive addition lenses provide the near addition power without any visible lines of demarcation or abrupt disturbances of *** particular,the intermediate power zone exhibits unwanted astigmatism which effects the accommodation of the *** for design of progressive addition lenses is to decrease the astigmatism by modifying the heights of the surface of designed progressive addition lenses.A novel op timizing method is prop osed based on the optimization *** relationship among mean power,cylinder power and the heights of the surface is deduced,and the optimizing factor is also *** with mean power a nd cylinder power of unoptimizing and optimizing progressive addition lenses,the astigmatism is decreased and the mean power is unchanged by adjusting the optimizing *** region in which the astigmatism near the nasal side on distance-vision portion is less than 0.25 D has become *** results manufactured progressive addition lenses are consist with those of designed progressive addition lenses.

关键词： Progressive addition lenses Mean power Astigmatism Optimization

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Entangled coherent states:generation

第十四届全国量子光学学术会议

作者： He Dai-guo,Dong Yu-li,Fang Jian-xing~*,qian Li and Hu Jie (school of Physics and Technology,suzhou university,suzhou 2.5006,china)

＜正＞In this paper we present how to generate the Bell-type and cluster-type entangled coherent states and give some discussions on *** scheme employs a single two-level atom that interacts separately with cavity mod...

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试论法律术语

上海大学学报（社会科学版） 2002年第3期9卷 56-59页

作者：陈炯钱长源江南大学中文系南京210000 苏州大学法学院苏州215021

从现代语言学的角度探讨有关法律术语的几个问题:一是法律术语的定义和法律词汇的构成;二是法律术语的结构形式和法律术语的形成;三是法律术语的语义特点。

关键词：法律术语法律词汇法律术语结构语义特征