检索结果-南通市图书馆

Theoretical analysis of square GRIN lens

在线全文

学校读者我要写书评

暂无评论

Theoretical analysis of square GRIN lens

2007亚洲光电子会议光学设计与测试分会场

作者： Zigang Zhou* Kai Chen Ren Zhang College Of science southwest university of science and technology Mianyang China 621010

Square Gradient-index Selfoc lenses （GRIN） were successfully prepared by Tl+ and K+ ion-exchange. The ion concentration equation in square class fiber was calculated by variable separation method. The refractive-index profile of Square GRIN lenses analytic solution is got based on the linear relation between refractive-index and ion concentration. The computation results are in good agreement with the measured ones. MATLAB partial differential toolbox was used to numerically solve ion diffusion equation on square boundary conditions, this works is easy to be handled and redound to the research on Square GRIN Lenses. The refractive-index analytic solution can be predigested and modeled by a square law function with introducing the concept of incidence directions angle. Based on the function, the ray’s trajectory equation and Numerical Aperture were got. This work shows that the optical properties of Square GRIN lenses are related to the directions angle.

关键词： Square GRIN Lenses refractive-index ray trail equation Numerical Aperture Imaging property

在线全文

cnki会议

学校读者我要写书评

暂无评论

基于WWW远程教育的数学解决方案

计算机工程与应用 2002年第7期38卷 239-240页

作者：朱东鸣西南科技大学绵阳621002

Internet已经进入超媒体时代,但是要在HTML的网页中显示数学公式是非常困难的。该文总结了在网页中数学公式的几种表示方法,并给出了一种全新的网页数学解决方案。

关键词：数学表达式 HTML MathML 远程教育 WWW

计算大Thiele模数催化剂有效因子的近似方法

在线全文

学校读者我要写书评

暂无评论

石油化工 2005年第1期34卷 41-45页

作者：陈尚伟吴照民西南科技大学生命科学与工程学院四川绵阳621000

应用带大参数微分方程理论,对具有大Thiele模数多孔催化剂颗粒内的非线性扩散-反应边值问题作了近似处理,提出了计算催化剂有效因子的近似表达式。针对冪函数型和Langmuir-Hinshelwood型动力学方程,用近似表达式计算了片形、圆柱形、球... 详细信息

应用带大参数微分方程理论,对具有大Thiele模数多孔催化剂颗粒内的非线性扩散-反应边值问题作了近似处理,提出了计算催化剂有效因子的近似表达式。针对冪函数型和Langmuir-Hinshelwood型动力学方程,用近似表达式计算了片形、圆柱形、球形3种不同形状催化剂颗粒的有效因子。将近似表达式的计算结果与用正交配置法计算的结果比较,二者在较宽的参数范围内十分吻合。通过计算还表明,利用近似表达式计算催化剂颗粒的有效因子,具有使用简便、计算快速的优点。

关键词：近似表达式有效因子近似方法边值问题微分方程模数大参数多孔催化剂正交配置法颗粒

Research on the Circular Economy and Recycling Utilization of Agricultural Wastes

在线全文

学校读者我要写书评

暂无评论

Research on the Circular Economy and Recycling Utilization o...

2011 IEEE International Conference on Waste Recycling,Ecology and Environment(ICWREE 2011)

作者： Lixia LU* Futian LI School of Economic Management southwest university of science and technology Mianyang China

The recycling utilization of agricultural waste is a significant part of agricultural Recycling Economy. Since a great number of agricultural wastes have been produced in China, bringing about the recycling utilization through certain technical means and production modes will be not only benefit to the rural agricultural environment protection, but also increase the utility’s efficiency of the resource, so that the rural resource and energy’s shortage problems can be solved. It will reach the multiwin results. document.

关键词： circular economy agricultura wastes recycling

Process Fault Diagnosis Based on Kernel Regularized Fisher Discriminant

在线全文

cnki会议

学校读者我要写书评

暂无评论

Process Fault Diagnosis Based on Kernel Regularized Fisher D...

2011 Chinese Control and Decision Conference（CCDC）

作者： Yu Chunmei is with School of information engineering,southwest university of science and technology,Mianyang,Sichuan,621010,China

Fisher discriminant analysis （FDA） is a widely used dimensionality reduction technique for fault diagnosis in industry process,whereas it is difficult to capture nonlinear *** FDA （KFDA） is nonlinear extension of FDA developed in the last ten ***,small sample size （3S） problem will be arisen in both FDA and *** FDA （RFDA） is an effective solution for this *** obtain kernel form of RFDA is basis for solving both nonlinear and 3S *** this paper a novel kernel form of RFDA,which is transformed to equation solving problem and expressed in the dual form,is deduced and implement procedure for fault diagnosis is *** results on the Tennessee Eastman TE process show validity and effectivity of the proposed kernel algorithm for 3s *** relationships between regularization parameter and diagnosis effect are derived at last.

关键词： fault diagnosis regularization Fisher discriminant analysis kernel method

Finite-time Stability Analysis for Switched Linear Systems

在线全文

cnki会议

学校读者我要写书评

暂无评论

Finite-time Stability Analysis for Switched Linear Systems

2011 Chinese Control and Decision Conference（CCDC）

作者： Weiming Xiang is with southwest university of science and technology,Mianyang,621000,China.Now he is pursuing PhD degree in southwest Jiaotong university,Chengdu,610031,China.Jian Xiao is with southwest Jiaotong university,Chengdu,610031,China.Chengyong Xiao is with southwest university of science and technology,Mianyang,621000,China

In this paper,the finite-time stability analysis problems for switched linear system are *** sufficient conditions for finite-time boundness of switched system are *** is proved that finite-time boundness is related to both subsystems and switching ***,by comparing proposed results,it is shown that the more information about the signal is known,the less conservative results can be *** numerical examples are given to illustrate the results in this paper.

关键词： Switched linear systems Finite-time stability Finite-time boundness

Entropic stochastic resonance in a confined structure driven by dichotomous noise and white noises

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第8期21卷 71-77页

作者：郭锋程晓锋李少甫曹文黎恒 School of Information Engineering Southwest University of Science and Technology Research Center of Laser Fusion China Academy of Engineering Physics

The entropic stochastic resonance （ESR） in a confined system subjected to dichotomous noise and white noise and driven by a periodic sinusoidal force along the x axis of the structure and a time-dependent force in the declining direction, is investigated. Under the adiabatic approximation condition and based on the two-state theory, the expression of the output signal-to-noise ratio （SNR） is obtained. The results show that the SNR is a non-monotonic function of the strengths of dichotomous noise, white noise, and correlated strength of correlated noise. In addition, the SNR varies non-monotonically with the increase of the shape parameters of the confined structure, and also with the increase of the constant force along the y axis of the structure. The influence of the correlation rate of the dichotomous noise, and that of the frequency of the periodic force on the SNR are discussed.

关键词： entropic stochastic resonance dichotomous noise correlated noise square-wave signal,signal-to-noise ratio

在线全文

学校读者我要写书评

暂无评论

论公益行政诉讼制度的构建

现代法学 2002年第6期24卷 85-89页

作者：王彦廖斌东北大学西南科技大学辽宁沈阳110004 四川绵阳621002

公益行政诉讼是为了排除传统的原告适格理论的阻却而在无传统诉权人的情况下 ,为公益目地而设定的一项救济制度 ,应通过纳入法律援助制度 ,设立前置程序 ,放宽原告起诉条件的审查标准及防止滥诉来保障公益行政诉讼制度的建立。

关键词：公益行政诉讼原告适格理论表面真实标准前置程序

Study of Wire Rod On-line Measuring technology

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Study of Wire Rod On-line Measuring Technology

第一届国际测量仪器与测试自动化学术会议

作者： Li Zhanfeng Zhang Jianping (southwest university of science and technology. Mian Yang SiChuan 621000 China)

＜正＞This paper introduced two common measuring methods （laser scan and photoelectric camera shooting） and estimated their dynamic error. In addition, contrast between them and offer their estimating error. Finally... 详细信息

关键词： Rolling wire on-line measuring laser scan photoelectric camera shooting.