Domain Coloring and the Argument Principle     

Frank A. Farris 《PRIMUS》2017,27(8-9):827-844

Abstract

The domain-coloring algorithm allows us to visualize complex-valued functions on the plane in a single image—an alternative to before-and-after mapping diagrams. It helps us see when a function is analytic and aids in understanding contour integrals. The culmination of this article is a visual discovery and subsequent proof of the Argument Principle, which relates the count of poles and zeros of a meromorphic function inside a contour to the accumulated change in argument of the function around the contour. Throughout, I offer connections to standard learning goals of courses in complex variables.  相似文献   

无线传感器网络的SPIN协议研究   总被引：2，自引：0，他引：2  

王春  罗惠琼 《十堰职业技术学院学报》2004,17(2):60-62

无线传感器网络是计算机科学技术的一个新的研究领域，是传感器技术、嵌入式计算技术、分布式信息处理技术和无线通信技术相结合的产物，具有广阔的理论研究和应用前景。本文对一种无线传感器网络路由协议SPIN-PP作了分析，并针对无线传感器网络的特点对其进行了一些改进工作，经NS2上的仿真结果表明这是一种有效的改进方案。  相似文献   

Mapping the social side of pre-service teachers: connecting closeness,trust, and efficacy with performance     

Yi-Hwa Liou  Alan J. Daly  Esther T. Canrinus  Cheryl A. Forbes  Nienke M. Moolenaar  Frank Cornelissen 《Teachers and Teaching》2017,23(6):635-657

This exploratory study foregrounds the important, but often understudied social side of pre-service teacher development and its relation to teaching performance in one university-based teacher preparation program in the US. We examine the extent to which pre-service elementary teachers’ social relationships and perceptions of peer trust and efficacy are associated with performance on a high stakes mathematics teaching assessment. Findings suggest that social and emotional support through close social ties, peer trust, and self-efficacy are significantly and positively associated with pre-service teachers’ teaching performance. Our work further contributes to the development and discourse about teacher education in university-based teacher preparation programs.  相似文献   

星型网络中的混沌同步     

樊庆端  刘曾荣 《上海大学学报(英文版)》2004,8(2):124-127

Using an example,it was analytically proved that the dynamical systems constructed on a star coupled network is more easy to be synchronized than that in coupled map lattices(CML).The result shows that the synchronization in small-world networks may be realized more easily.  相似文献   

论二语词汇知识的习得模式     

李晓云 《安阳师范学院学报》2007,(4):121-123

以词汇知识为概念框架,围绕第二语言水平及词汇量与语义网络发展的关系问题,探究中国英语学习者第二语言词汇知识习得模式。研究发现,针对个词的习得而言,第二语言水平、词汇量和词汇网络之间存在密切而复杂的关系。  相似文献   

利用Hopfield神经网络实现自适应滤波器     

刘茜君  陈钧量 《中山大学学报论丛》1992,(2)

针对两种不同结构的Hopfield神经网络,本文提出分别适当选取该神经网络的连接权值来实现LMS自适应滤波和自适应格型滤波的方法。并分析了实现自适应滤波的HOP-field神经网络的稳定性及其滤波性能.  相似文献   

A Second Order Training Algorithm for Multilayer Feedforward Neural Networks     

谭营  何振亚  邓超 《东南大学学报》1997,(1)

ＡＳｅｃｏｎｄＯｒｄｅｒＴｒａｉｎｉｎｇＡｌｇｏｒｉｔｈｍｆｏｒＭｕｌｔｉｌａｙｅｒＦｅｅｄｆｏｒｗａｒｄＮｅｕｒａｌＮｅｔｗｏｒｋｓＴａｎＹｉｎｇ（谭营）ＨｅＺｈｅｎｙａ（何振亚）（ＤｅｐａｒｔｍｅｎｔｏｆＲａｄｉｏＥｎｇｉｎｅｅｒｉｎｇ，Ｓｏｕ...  相似文献   

复超球上Schwarz引理的推广及应用     

谭海鸥 《五邑大学学报(社会科学版)》1993,(3)

本文研究了经典的Schwarz引理在复超球上的推广并由此建立了复单位球的Poincar(?)度量。此外还给出了它们在多元复分析中的若干应用。  相似文献   

Adaptive swarm-based routing in communication networks     

吕勇  赵光宙  苏凡军  历小润 《浙江大学学报(A卷英文版)》2004,5(7):867-872

Swarm intelligence inspired by the social behavior of ants boasts a number of attractive features,including adaptation,robustness and distributed,decentralized nature,which are well suited for routing in modern communication networks.This paper describes an adaptive swarm-based routing algorithm that increases convergence speed,reduces routing instabilities and oscillations by using a novel variation of reinforcement learning and a technique called momentum.Experiment on the dynamic network showed that adaptive swarm-based routing learns the optimum routing in terms of convergence speed and average packet latency.  相似文献   

配电网理论线损计算算法比较     

刘静  杨国杰  刘秀玲  李维健 《河北工业大学成人教育学院学报》2008,23(4):34-38

本文归纳和比较了在配电网中理论线损计算的两类常规方法:基于均方根电流原理的近似计算和潮流计算,概括地阐述了几种常见方法的基本原理和优缺点,并在此基础上提出了一种优化算法的思想.  相似文献