光纤通道适配器基本原理及其实现的研究

本文在分析光纤通道协议结构的基础上,研究了光纤通道主机适配器的体系结构和电路原理,以ISP2200A为核心芯片探讨了其电路实现和作业流程。所获得的结论对于光纤通道接口的设计和构建SAN系统具有普遍的意义。     

基于JSSE的汉诺塔游戏设计与实现

对汉诺塔游戏问题进行了研究,发现了对汉诺塔游戏用递归算法实现符合问题逻辑结构。设计了基于JSSE的递归算法实现了手动移盘和自动移盘的游戏功能。     

Espaces métriques rationnellement présentés et complexité, le cas de l'espace des fonctions réelles uniformément continues sur un intervalle compact

We define the notion of rational presentation of a complete metric space, in order to study metric spaces from the algorithmic complexity point of view. In this setting, we study some representations of the space C[0,1] of uniformly continuous real functions over [0,1] with the usual norm: ||f||_∞ = Sup{|f(x)|; 0x1}. This allows us to have a comparison of global kind between complexity notions attached to these presentations. In particular, we get a generalization of Hoover's results concerning the Weierstrass approximation theorem in polynomial time. We get also a generalization of previous results on analytic functions which are computable in polynomial time.     

一种城市道路双黄线识别方法

根据城市道路图像中双黄线区域的特征,用变形Sobel 算子加大双黄线区域纹理,分割出图像中双黄线区域粗略位置;应用最大类间方差和数学形态学方法求出满足纹理条件区域的二值图像,从而得到双黄线区域准确位置。     

基于客户端GUI构件实例缓存技术的系统性能优化处理

随着 Ｗｅｂ技术的发展和普及,越来越多的应用软件是直接从 Ｗｅｂ服务器通过网络传递到客户端运行的。借鉴图像处理软件中采用的双缓存技术而提出的构件实例缓存技术在基于网络应用程序设计中的应用,将优化系统的性能。该文提出在客户端图形化用户界面的设计中的实例缓存技术,并针对应用程序运行的不同网络环境提出应用这项技术的不同策略,同时设计了实例缓存技术的应用模型。     

Exponential lower bounds for depth three Boolean circuits

We consider the class of unbounded fan-in depth three Boolean circuits, for which the bottom fan-in is limited by k and the top gate is an OR. It is known that the smallest such circuit computing the parity function has gates (for k = O(n ^1/2)) for some , and this was the best lower bound known for explicit (P-time computable) functions. In this paper, for k = 2, we exhibit functions in uniform NC ¹ that require size depth 3 circuits. The main tool is a theorem that shows that any circuit on n variables that accepts a inputs and has size s must be constant on a projection (subset defined by equations of the form x _i = 0, x _i = 1, x _i = x _j or x _i = ) of dimension at least log(a/s)log n. Received: April 1, 1997.     

镁铝水滑石对PVC热稳定性能的影响

采用比色法、热失重法研究了镁铝水滑石、铅盐、有机锡、以及镁铝水滑石与铅盐、有机锡复配的复合稳定剂对PVC的稳定效果,考察了铅盐稳定体系和镁铝水滑石与有机锡复合稳定体系对PVC力学性能和流变性能的影响.结果表明镁铝水滑石分别与铅盐、有机锡进行复配均具有较好的协同效应且后者对PVC的稳定效果更好.其中,VC、镁铝水滑石和有机锡以100.5.5质量比复配的复合体系具有较好的力学与加工流变性能.     

The road to intelligence

It is argued that robotic platforms are the way forward towards building intelligent systems, where multiple sensors and manipulation are used for cognitive processes. It is also argued that the cue for developing the right architecture for such a system is human language.     

A method for double series summation

The method of summation by diagonals is shown to be a practical method for the summation of double series which can give good results. Where problems arise an elementary analysis can often be used which enables the sum to be calculated to a high degree of accuracy. The method can be extended in an obvious manner to higher dimensional series.     

基于Matlab的一阶倒立摆系统建模及仿真

倒立摆系统是一个典型的快速、多变量、非线性、不稳定系统,建立其数学模型研究其稳定性对于很多工程控制有着重大意义。论文采用机理建模法对一阶倒立摆系统进行分析,建立其数学模型。采用Matlab软件进行仿真验证,仿真结果表明,实验结果符合实际实验设计,所建立的一阶倒立摆系统的数学模型是有效正确的。