水准仪磁致误差检定程序的VC++实现

媒介与社会性格形塑之间存在着密切的对应性关系，社会学家大卫·理斯曼在其著作《孤独的人群》中探讨了历史文化变迁中社会性格所存在的深刻复杂性，其中就已经涉及到了媒介变迁与社会性格转化之间的关系问题。本文尝试在理斯曼的研究基础上，结合新近发展出的媒介研究理论，将媒介技术特性与社会性格转化之间的关系加以主题化，使之成为一个具有相对独立性的学术问题，并试图对理斯曼提出的所谓“传统导向性格”、“他人导向性格”与“内在导向性格”等社会性格的媒介形塑原因作出解释。     

开放性网络互连技术的探讨

从计算机通信网络的开放性原理出发,阐述了网络互连的技术,重点解释了多种主机、多类协议的网络兼客与互连的技术。     

连续工作方式下掺Yb光纤放大器的增益与噪声特性研究

对连续工作方式下掺Yb光纤放大器的增益与噪声特性进行理论研究,从描述掺Yb光纤放大器的速率方程与光传输方程出发,计算了掺Yb光纤放大器的增益与噪声指数,讨论在975nm泵浦光的作用下,泵浦功率、器件长度对放大器增益和噪声指数的影响。     

Design of Data Acquisition System for Vehicle Based on CAN Bus

To the question that a meter is correspond with a set of lead and a sensor,this paper presents a design of data acquisition system for vehicle based on CAN bus.In this way,the combinatorial instrument is only connected by a bus unit.Author introduces the data acquisition structure chart and the CAN interface,analyzes the software by program flow chart,and shows it's application for vehicle virtual instrument.A method of calculating vehicle speed,engine rotate speed and the course of development mileage are also given.     

Compressed Code of Fractal Image and Secure Communication with Chaos

Based on the fractal theory, using quarter tree in neighborhood method and Bang-Bang control method, the steady control of the chaotic in the secure communication is realized. A simulation circuit has been designed based on driving responding theory, then, its synchronization is simulated on the computer.     

A Medical Image Quantization Method Suited for PACS

Image compression is very important in picture archiving and communication system(PACS). The author studied the statistical distribution of image wavelet subimage coefficients and concluded that the distribution of wavelet subimage coefficients is similar to that of Laplasian distribution. On the other hand, in image reconstruction, the coefficient with different amplitude owns different weight, and different accuracy can be applied to different coefficients according to their different weight. Then, the author has designed a image quantization encoding scheme for PACS. In this scheme, they selected the sample-standard-deviation of coefficients in every subimage as the quantization threshold, and accurately encoded those coefficients with higher weight. Also, this algorithm utilized the visual character of human. The test has proved that the main advantages of this method are the simplicity in computing and predictable encoded coefficients, and a high compression efficiency can obtain too.     

基于Windows的PC机与单片机通信程序设计

随着微机测控系统的发展，人们对测控系统的要求越来越高。用户要求所使用的系统具有良好的人机交互模式，由此利用单片机具有的实时数据采集和微机对图形处理、显示的优势，结合Windows环境下的PC机良好的操作环境，使PC机与多单片机结合的网络测控系统越来越占主导地位。如何更好地在Windows平台下实现PC机与单片机的通信设计，成为测控系统中一个关键技术问题。为此，详细阐述了两种程序设计的方法。     

用于直流传动控制系统的串行通讯

介绍了用Visual Basic提供的串行通讯控件，通过编程实现了PC机与应用单片机触发电路的直流传动系统的通信。     

排种器实验台变频调速系统设计

为了利用排种器实验台进行精密播种机排种器的试验研究,设计了排种器实验台的调速系统.首先,介绍了排种器实验台变频调速系统的硬件构成;然后,基于计算机与变频器之间的串行通讯协议,利用VC 的MSComm通讯控件,用VC 6.0语言开发了排种器实验台变频调速系统的控制程序,实现了排种器实验台计算机与变频器的串行通讯.该系统具有操作方便、调速手段多、可靠性和抗干扰能力强等特点,可以满足排种器实验台需要对速度进行实时调节的要求.