用Winsock控件编写客户/服务器通信程序

网络编程日益成为人们编程的一个重要内容.本文介绍了如何使用Winsock控件以及用它编写客户/服务器通信程序的方法.     

TCP/IP协议与网络故障实战

TCP/IP协议是网络中计算机之间通信的“语言”,TCP/IP协议系统的层次结构和数据传输机制,使之成为Internet上最为实用的协议。在诊断网络故障中,清晰地把握此协议,可使网络故障的诊断与排除变得更加简单。     

天津市汽车维修模式浅析

本文主要从汽车维修企业经营特征角度论述了天津市汽车维修模式的基本发展现状、国外汽车维修模式对天津汽车维修业的启示以及天津汽车维修模式未来发展预测等几个问题。     

甲烷氧化偶联钙钛矿型纳米催化剂的制备及性能测定

采用溶胶-凝胶法制备了SrTiO3及其镁掺杂的钙钛矿型复合氧化物超细微粒催化剂,应用TEM、XRD等手段,研究所得超细微粒催化剂的粒子大小、组成结构与OCM反应催化性能。结果表明:高温、粒子细化、B位掺杂对OCM反应CH4的转化率、C2选择性都有提高。750℃时,SrTi0.9Me0.1O3对OCM反应的甲烷转化率为28.9％,C2选择性为60.0％。     

基于单片机控制的噪声实时监测

外界噪声信号通过传声器转换成音频信号，经过放大和V／F变换输入到单片机进行处理，并转换成相应的DB值通过LED显示，从而实现噪声的实时监测。其实现简单，精确度高，可用于实际进行噪声的实时监测。     

SiO2负载纳米级SO42-/TiO2固体超强酸的制备及其催化合成乙酸丁酯的研究

制备了SiO2负载纳米级SO4^2-/TiO2固体超强酸，对其催化活性、重复使用效果、失活原因及再生方法进行了研究。     

Development of shared vision: Lessons from a science education community collaborative

This is a qualitative case study of a collaboration among multiple stakeholders in science education who came together in order to create environmental field trips and the surrounding classroom curriculum. The collaboration involves 4 major facets of science education: formal education at the elementary and university levels, informal education, and educational research. The data were collected by means of observation, semi‐structured interviews, and written document review. This study examines how shared vision developed within the collaboration, the roles the participants played in its evolution, and how this process benefited both the collaboration and each individual collaborator. Several factors significantly affected the progress towards a shared vision and a successful collaboration including time, communication, understanding others' perspectives, dedication and ownership, as well as the collaborative environment. © 2007 Wiley Periodicals, Inc. J Res Sci Teach 44: 681–705, 2007     

河北大学后勤集团饮食管理系统的设计与实现

本文阐述了为提高河北大学后勤集团饮食管理的质量所开发的饮食管理系统的设计与实现。     

Tests in Life and Learning: A deathly dialogue

This article is an imaginary Socratic dialogue between J. S. Mill and Michel Foucault, principally concerning educational assessment.