新型特洛伊木马技术的研究

本文对特洛伊木马技术所采用的方法进行了分析,介绍了木马程序在植入、加载、隐藏以及在通信方面所采用的方法。在此基础上,分析如何基于动态链接库(DLL)和端口反弹木马技术实现木马程序。最后,给出了防范木马入侵的一般方法。     

新风动态负荷与空调节能

介绍利用空调软件对整栋大楼进行动态负荷计算分析,并以此选择空调设备,不但节省投资,而且达到节能效果.     

Walking-Induced Floor Vibration Case Studies

Excessive floor vibration due to walking is an important serviceability condition to be considered in building design. This paper presents several case studies of problem floors. The case studies include complaints about office, classroom, and retail spaces where vibration levels were found disturbing. In each of these cases, the cause of the vibration was due to people walking around the space. These case studies are presented to reinforce the existence of this problem, to describe nonstructural factors that affect the behavior of floors, and to provide new data to the design and research communities.     

压力AGC系统与其它厚控系统共用的相关性分析

分析证明了动态设定型厚度控制系统与监控、前馈厚度控制系统是相容的,而且保持各自的独立性,无相互影响。BISRA变刚度厚度控制系统和测厚计型厚控系统与监控、前馈厚度控制系统也是相容的,但它们之间有相互影响。BISRA恒压力厚度控制系统与监控、前馈厚度控制系统是不相容的,而动态设定型的恒压力方案是相容的。     

液态金属离子源发射系统电场的模拟分析

发射系统是液态金属离子源的关键部件之一，它的性能的优劣直接影响到整个离子源的工作稳定性和可靠性。因而对其发射系统进行仿真分析，可以很好地指导液态金属离子源的设计制造。本文采用国际上重视的动态喷流柱模型，利用模拟电荷法对液态金属离子源的发射系统的电场进行了计算分析，画出了发射尖端电场强度随不同参数变化的曲线，得出发射尖端表面场强与球冠半径、发射体突出臂长度密切相关，而与引出电极的结构关系甚小的结论，因此液态金属离子源发射特性（如角电流强度）的改善，必须在发射尖的设计制作上下功夫。从而为液态金属离子源的设计提供了一个有效的辅助工具。     

Strain rate sensitivity of the commercial aluminum alloy AA5182-O

The mechanical behavior of the commercial aluminum alloy AA5182-O is investigated at temperatures ranging from −120 to 150 °C and strain rates from 10⁻⁶ to 10⁻¹ s⁻¹. The strain rate sensitivity parameter is determined as a function of temperature and plastic strain, and the strain rate and temperature range in which dynamic strain aging leads to negative strain rate sensitivity is mapped. The effect of dynamic strain aging on ductility and strain hardening is investigated. The sensitivity of the measured quantities to the experimental method employed and their dependence on grain shape are discussed. The experimental data are compared with the predictions of a model constructed based on a recently proposed mechanism for dynamic strain ageing. The mechanism is based on the effect solute clustering at forest dislocations has on the strength of dislocation junctions. The model is shown to reproduce qualitatively the experimental trends.     

对隐马尔科夫模型中动态编程的探讨

主要对隐马尔科夫模型中的三个问题（估计问题、译码问题、学习问题）中的译码问题作了研究．并对其应用进行了探讨。     

Fuel coolant interaction experiments in TROI using a UO2/ZrO2 mixture

This paper discusses the results of steam explosion experiments using reactor material carried out under “Test for Real cOrium Interaction with water (TROI)” program. About 4–9 kg of corium melt jet is delivered into a sub-cooled water pool at atmospheric pressure. Spontaneous steam explosions are observed in four tests among six tests. The dynamic pressure, dynamic load, and morphology of debris clearly indicate the cases with steam explosion. The initial conditions and results of the experiments are discussed.     

Dynamic anti-windup based control method for state constrained systems

Based on the dynamic anti-windup strategy, an alternative control methodology for state constrained systems is presented. The proposed method is an a posteriori approach for state constrained systems, which is differentiated from the usual a priori approach. That is, first a linear controller is designed to show a desirable nominal performance by ignoring state constraints. Then, an additional compensator is introduced to account for state constraints. By minimizing a reasonable performance index, a dynamic compensator is derived explicitly, which is expressed in plant and controller parameters. The proposed method not only provides a graceful performance degradation, but it also guarantees the total stability of the resulting systems. An illustrative example is given to show the effectiveness of the proposed method.     

自行车群体流的在线实时测量

本文提出了一种利用环形线圈采用动态频差法配合模式识别技术实现对自行车群体流自动检测的方法。讨论了该方法的基本原理、识别模型及据此方法研制成的在线实时智能式自行车群体流量测量仪的试验结果，其测量准确度达８５％以上，数据以５秒时间间隔存入内存或上位机。此样机在现场连续运行３年多，已获满意结果。