A New Definition of Virus

Security experts have not formally defined the distinction between viruses and normal programs. The paper takes user＇s intension as the criteria for malice, gives a formal definition of viruses that aim at stealing or destroying files, and proposes an algorithm to detect virus correctly. Compared with traditional definitions, this new definition is easy to understand, covers more malwares, adapts development of virus technology, and defines virus on the spot. The paper has also analyzed more than 250 real viruses and finds that they are all in the domain of the new definition, this implies that the new definition has great practical significance.     

一种新型的机载雷达射频仿真系统设计方案

用现有的射频仿真方法实现机载雷达仿真，为满足远场条件，将导致暗室尺寸过火等一系列问题。论文提出了一套新型的机载雷达射频仿真系统设计方案，该方案可以大大缩减微波暗室的建造尺寸和成本，并且有视场角大、静区特性较好、控制结构简单等特点。并对影响目标位置精度的各因素进行了分析。     

Color Matching for Fiber Blends Based on Stearns-Noechel Model

IntroductionMany industrial applications use blends of coloredfibers to produce special effects such as nonsolid or mottledappearance[1].In this case ,it is i mportant to predict theproportions of colored fibers in a blend. Up to now,thecolor mixing behaviour of pre-colored fiber blends has beendescribed in some papers , various empirical and semi-empirical methods are developed to color matching processof pre-colored fiber blends . Only Datacolor InternationalCompany has the commercial soft…     

滑动直丝弓矫治技术在关闭牙列散在间隙的应用体会

目的探讨滑动法一次性关闭牙列散在间隙的临床疗效.方法选择牙列存在散在间隙的错颌畸形患者29例,年龄最大30岁,年龄最小11岁,平均14.5岁,均在MBT直丝弓矫治技术中使用一次性滑动关闭散在间隙.结果所有患者均能关闭所有散在间隙,平均治疗时间为12个月左右,结果令人满意.结论滑动法一次性关闭牙列散在间隙,避免了前牙在治疗过程中的往返移动,缩短了疗程,具有良好的治疗效果.     

小水线面三体船阻力试验研究

提出了一种阻力性能优良、船长排水量系数小的高速小水线面三体船型。对这种船型进行了2种主体型线、9种侧体布局的阻力试验，分析研究了阻力性能，讨论了船长排水量系数和侧体布局对阻力性能的影响。并给出了与细长型三体船阻力试验的对比结果。     

地形地质剖面图的屏幕输出方法

本文论述了煤矿床地形地质剖面图的屏幕输出方法。特别是编写的多功能画线程序。圆满解决了地层的尖灭处理问题     

我国轻工业的技术引进与后发效应的综合分析

技术引进是世界各国利用外部资源发展本国经济的一个重要途径，特别是对于发展中国家，更是加速改造本国技术基础，调整产业结构，提高本国生产能力和出口能力，发挥“后起国效应”（后发效应）的一个不缺少的重要条件，文章从学习曲线，技术周期，产品周期，技术差距及产业结构变化等方面，综合分析技术引进对我国轻工产业后发效应的作用与影响。     

逆系统方法及其应用

本文提出了一种设计非线性反馈控制系统的方法，称作过系统方法．这种方法的要点，就是用对象的逆系统构造出一种可用反馈结构实现的“α──阶积分逆系统”，将原对象补偿为具有线性传递关系的系统，即α阶伪线性系统，然后用线性系统的理论来解决这种系统的综合问题。同时，本文还将逆系统方法用于机械手控制系统的设计，从所给出的仿真来看，结果是令人满意的。     

G-G PATTERNING METHOD OF SILK WEAVING IN EARLIER CHINA

There are some unique techniques in the Chinese traditional silk production. 2-2 patterning method is such one suggested by foreign scholars. But this paper gives a more extensive concept, G-G method, which includes the 2-2 method after studying more fabrics from the Shang. to the Five Dynasties. Finally, the paper discusses the truth of G-G method the (?) applied in, and some characteristics of G-G method.