基于神经网络的模糊系统

模糊理论和神经网络是信息处理和控制领域的最新技术，但各有优缺点。本文介绍了一种将二者结合起来，充分发挥二者优点的方法，以期能对读者有所帮助。     

带式驱动稳瞄系统的综合力矩方程

严格推导了反射镜稳定系统的综合力矩方程,重点分析了载体角运动耦合造成的旋转惯性力矩,2:1机构附加力矩以及环架哥氏惯性力矩;并提出必要的减小措施,为平台设计输出力矩的估算及伺服控制补偿提供了设计依据和实用方程。     

飞行模拟器用投射系统设计

研究了一种瞄准镜用飞行模拟器投射镜头的设计,并给出了模拟器投射镜头的设计实例。模拟器由显示系统、屏幕、投射系统、反射镜组成,模拟图像信号送入模拟器的显示系统,显示系统将视景仿真模拟图像信号投射到屏幕上,屏幕位于投射系统的焦平面上,瞄准镜对由模拟器进入的光线成像实现成像模拟。投射系统由周边系统、中心系统共9路光学镜头组成,投射系统周边系统、中心系统对应于瞄准镜的中心系统与周边系统,中心系统与周边系统的物面位置重合即共物面;中心系统采用摄远物镜镜形式缩短了镜头长度结构更加紧凑。周边系统焦距为f=263．02mm,视场角为2ω=17°,全视场畸边〈0．4％,在屏幕的Nyquist频率处全视场的MTF〉0．9,系统长度330mm;中心系统焦距为f=295．00mm,视场角为2ω=17°,全视场畸变〈0．37％,在屏幕的Nyquist频率处全视场的MTF〉0．9,系统长度283．2mm。投射系统采用全口径出光,同时系统通光口径略大于敏感器的通光口径,降低了系统装配的精度。     

Conserved quantities and symmetries related to stochastic Hamiltonian systems

In this paper symmetries and conservation laws for stochastic dynamical systems are discussed in detail. Determining equations for infinitesimal approximate symmetries of Ito and Stratonovich dynamical systems are derived. It shows how to derive conserved quantities for stochastic dynamical systems by using their symmetries without recourse to Noether's theorem.     

非线性系统可逆的多轨线方法

乌克兰科学院A．M．kovalev教授于1993年首次提出了针对一般非线性系统{x=f(t,x,u)；y=h(t,x,u),x(t0)=x0的多轨线求逆方法。本文将该方法引入仿射非线性系统，使不可逆系统在一定条件下成为可逆。并给出了具体的求逆步骤，举例说明。     

Variable Separation Approach to Solve Nonlinear Systems

The variable separation approach method is very useful to solving (2 1)-dimensional integrable systems.But the (1 1)-dimensional and (3 1)-dimensional nonlinear systems are considered very little. In this letter, we extend this method to (1 1) dimensions by taking the Redekopp system as a simp!e example and (3 1)-dimensional Burgers system. The exact solutions are much general because they include some arbitrary functions and the form of the (3 1)-dimensional universal formula obtained from many (2 1)-dimensional systems is extended.     

远程控制实验系统中的视频系统

介绍了NetMeeting、视频控制插件与NAT在远程控制实验系统的视频系统中的应用方案.利用NetMeet-ing强大的功能及其通用性,LabVIEW的易用性,再结合Linux的稳定性,使远程控制实验系统的视频系统变得更加完善.     

便携式条形码阅读器的设计

本设计为一种便携式条形码阅读译码器（简称阅读器），它采用ＩＮＴＥＬ８０３１ＣＰＵ微处理器为主芯片，辅以其它大规模集成电路芯片，构成一智能化系统，阅读及识别采用Ｃｏｄｅ３９码编制的条形码，并能完成条形码信息的存储、数目统计及与微机进行串行通信功能。     

FLIR和其它热像仪的现场测试

已研制出两种MRTD准直仪系统,用于测量安装在飞机、坦克和其它运载工具上的FLIR系统性能。一种是全面评价热像仪的通用设备,另一种是对性能作合格与不合格检验用手持式测试装置。后者同样十分适用于生产测式。     

长焦距光学系统研究

本文讨论了反射系统、折反射系统的设计问题。得出焦距4000毫米,相对孔径1:4,视场3°,调制传递函数0.40,80%能量集中的弥散盘半径6.5微米的结果。     

First Integrals and Integral Invariants of Relativistic Birkhoffian Systems

For a relativistic Birkhoflan system, the first integrals and the construction of integral invariants are studied. Firstly, the cyclic integrals and the generalized energy integral of the system are found by using the perfect differential method. Secondly, the equations of nonsimultaneous variation of the system are established by using the relation between the simultaneous variation and the nonsimultaneous variation. Thirdly, the relation between the first integral and the integral invariant of the system is studied, and it is proved that, using a t~rst integral, we can construct an integral invarlant of the system. Finally, the relation between the relativistic Birkhoflan dynamics and the relativistic Hamilton;an dynamics is discussed, and the first integrals and the integral invariants of the relativistic Hamiltonian system are obtained. Two examples are given to illustrate the application of the results.     

对静电与静磁系统虚功原理的几点说明

静电系统与静磁系统是处于平衡状态的系统，各带电体或载流导体间存在相互作用力，将静力学的虚功原理推广到这些系统，并用来求系统内部的相互作用力，有时是很方便的．本文对静电与静磁系统的虚功原理及其应用作几点说明．     

CMS Software Distribution and Installation Systems：Concepts,Practical Solutions and Experience at Fermilab as a CMS Tier 1 Center

The CMS Collaboration of 2000 scientists involves 150 institutions from 31 nations spread all over the world.CMS software system integration and release management is performed at CERN.Code management is based on CVS,with read or write access to the repository via a CVS server,Software configuration,release management tools(SCRAM) are being developed at CERN.Software releases are then distributed to regional centers,where the software is used by a local community for a wide variety of tasks,such as software development detector simulation and reconstruction and physics analysis.Depending on specific application,the system environment and local hardware requirements,different approaches and tools are used for the CMS software installation at different places.This presentation describes concepts and reactial solutions for a variety of ways of software distribution,with an emphasis on the CMS experience at Fermilab,Installation and usage of different models used for the production farm,for code development and for physics analysis are described.     

振动环境试验设备系统仿真

振动试验系统由振动控制器、功率放大器、振动台、夹具、试件、加速度测量系统等组成。振动试验设备系统包括了除夹具、试件以外的各系统，涉及力学、电子学、计算机测量与控制等多个领域。通过对整个设备系统进行仿真，可以对振动试验开展定量的和数字化的研究，对深入认识振动试验的原理、改进和提高试验质量，具有重要意义。