线性规划问题的对比教学

对线性规划问题，一般用单纯形法求解。本文探讨了用矩阵及Gauss消元法来处理单纯形法的思想，使学生易于理解、掌握、应用线性规划问题。     

基于现场总线的磁浮列车测控系统

本文作者介绍了基于CAN总线和485总线的磁浮列车测控系统。作者详细阐述了磁浮列车测控系统的结构。最后列举了磁浮列车测控系统中系统软件主要的数据结构并叙述了磁浮列车测控系统的系统软件的工作流程。     

The measuring method of early lateral energy fraction in the scale model experiments

This paper introduces a measuring method of early lateral energy fraction in the scale model experiments. According to the interference principle of half wave length making the high frequency figure-8 directional microphone. With the signal-processing technique, a receiving and analyzing system, for the measurements of lateral energy fraction in the scale model is realized.     

食品中大肠菌群实际检测过程中关键问题的探讨

本文通过一些典型试验分析探讨,解决大肠茵群实际操作过程中的关键问题.结果如下:在鉴别培养基上得到大肠菌群典型茵落特征时,可以直接出报告;初发酵以是否产酸作为阳性管判断的依据,准确度会提高;固体样品初发酵稀释度选择方法为:100、10-1、10-2.     

CCD传感器实时检测系统在微细电火花加工机床上校正法的研究

CCD(Charge-Couple Device)传感器实时检测系统是一套基于光电检测技术的质量监测仪器,可用于实时观测和测量被加工工件,特别适合安装应用于微细电火花加工机床.本文就该系统安装在电火花加工机床上后如何提高检测精度进行研究,提出了3种方法对该检测系统进行校正,如,整体校准常数、C值校正、D值校正.此后设计实验来检验校准后该系统的稳定性和精确度,从而验证了所提出的三步校正法的可靠性.     

基于蚁群思想的源攻击追踪方法

在现有的攻击源追踪技术中还存在不少弊端,例如:输入测试法需要技术人员的干预,ICMP定位法占用网络带宽资源等,并且事后不能准确地追踪到攻击的源头.提出一种基于蚁群思想的网络协同源攻击追踪方法,通过使用IMCP定位报文法的策略,在网络监测器上对攻击数据包进行“备份”,然后再利用蚁群算法缩小路径信息查询的范围,从而能够快速的构造出攻击路径.实验表明:该方法提高了追踪信息的查询速度和攻击源定位的准确性.     

Simulation of X-ray pulsar signals with multiphysical properties

In view of the few and discontinuous X-ray pulsar data, based on the physical properties of the X-ray pulsar real data from the Rossi X-ray Timing Explorer (RXTE) spacecraft, this paper adopts the fast iterative method and the 10 μs time transformation model, simulates the X-ray pulsar signals which have the periodic property, spectral property, and the background noise property as well as a variety of delay effects. We design and implement simulation software which can simulate the X-ray pulsar signals with multi-physical properties. The results of comparing the real data and simulation data in the same situation show that the simulation noises and the actual noises have the same distribution, that the period stability of the simulated X-ray pulsar data agrees with the real data, with the error of only 0.43％, in different energy levels, that the simulated data's integrated profile and the real data's standard profile are highly correlated with the Pearson correlation coefficient of 0.99, and that under the 10μs time transformation model, the time conversion accuracy of the simulation data can reach 10^-7s, the error between the simulation and the real data being just only 10^-7s, which meets the time transformation accuracy. Therefore, the proposed method can realize the high-fidelity simulations and generate the continuous pulsar signal with many physical properties.     

光纤电磁场传感器中调制与解调电路的设计及实现

文［１］提出光纤电磁场传感器中的光调制与电解调技术。本文针对光纤电磁场传感器中的一些特殊问题，着重讨论光调制与电解调电路的设计原理。并将实现的电路应用于单光路检测的光纤电磁场传感器中，实验测试取得满意的结果。     

浅谈混凝土抗压强度试验中环箍效应对试件影响范围的确定

利用静态应变仪及分析软件在混凝土抗压强度试验时对混凝土试件产生的横向变形数据进行采集和分析,得出沿混凝土试件高度范围内,距压板越远,环箍效应对试件的影响越小,反之亦然。环箍效应对混凝土试件的影响集中在距压板范围内。