兔皮鞣制剂改良配方及操作方法的探讨

兔、猫、鼠等家养和野生的小动物的毛皮,由于缺乏毛皮鞣制技术,或者是由于所得到的生皮质地僵硬,抗水、抗虫、抗化学药剂的性能差,不能直接用来做衣饰用品为了使零散的小兽皮充分地利用起来,文章在传统鞣制方法的基础上,研制出两种新的鞣制剂配方.是以兔皮为材料,通过对传统的鞣制剂改良而成.经过改良的鞣制法简单,操作简便易行,效果较传统鞣制法好.     

Multivariate Bayesian regression applied to the problem of network security

An Erratum has been published for this article in Journal of Forecasting 23(6): 461 (2004) . This paper examines the problem of intrusion in computer systems that causes major breaches or allows unauthorized information manipulation. A new intrusion‐detection system using Bayesian multivariate regression is proposed to predict such unauthorized invasions before they occur and to take further action. We develop and use a multivariate dynamic linear model based on a unique approach leaving the unknown observational variance matrix distribution unspecified. The result is simultaneous forecasting free of the Wishart limitations that is proved faster and more reliable. Our proposed system uses software agent technology. The distributed software agent environment places an agent in each of the computer system workstations. The agent environment creates a user profile for each user. Every user has his or her profile monitored by the agent system and according to our statistical model prediction is possible. Implementation aspects are discussed using real data and an assessment of the model is provided. Copyright © 2002 John Wiley & Sons, Ltd.     

移动代理及其安全性分析

在概要介绍移动代理技术的基础上,对这一新技术领域进行了深入地研究,明确问题,分析现状.文中描述了代理的三种属性:移动性、可执行性和自治性,并结合这些属性做出了相应的安全性分析,给出了一些安全防护的技术建议.     

一种实时战场仿真的层次结构及算法研究

在实时战场仿真环境下提出了一种基于智能体的战场交互通信模型，在此基础上采用组队工作的思想，将任务分解为各Agent能够执行的子任务，并对其进行了角色定义、算法描述，采用任务表示语言TRL将知识表达出来，实现了应用智能Agents对战场交互式通信模型进行实时战场仿真。     

间歇法合成二氧化硫脲

以硫脲及双氧水为原料,研究了在水介质中间歇合成二氧化硫脲的方法,并在实验室条件下考察了添加剂种类、反应温度、反应时间、反应物投料比等因素对反应结果的影响。结果表明,加入添加剂、降低反应温度及缩短反应时间,有利于主反应的进行。追踪了产物中硫酸盐的浓度,认为二氧化硫脲的深度氧化是主要的串联副反应,并与二氧化硫脲本身分子结构有关。     

Research progresses of artificial nucleic acid cleavage agents

Artificial nucleic acid cleavage agents have attracted close attention because they play important roles in biochemistry and molecular biology. According to the cleavage mechanism of nucleic acid, they are divided into three types, namely free radical, phosphodiester bond hydrolysis and elimination cleavage agents. In this review, a series of cleavage agents, including the site- and sequence-specific ones, are illustrated, and some suggestions for the future researches in this field are also put forward.     

一种含双络合剂的三价铬镀液研究

本文作者研究了以硫氰酸根和甘氨酸为络合剂的三价铬镀液,得到了光亮和均匀的镀层,并讨论了其最适宜的工艺条件和沉积机理.     

镁基脱硫剂与铁水炉外脱硫

介绍几种镁基脱硫剂的制务圾镁基脱硫技术的与应用现状，期望有助于我国镁基脱硫技术的提高。     

磷氮型极压抗磨添加剂性能的研究

合成了磷氮型极压抗磨添加剂亚磷酸二丁酯-马来酸二丁酯-胺衍生物(Ⅰ)和亚磷酸二丁酯-丙烯酸酯-胺衍生物(Ⅱ)。研究表明烷基链较长时油溶性好,用伯胺时极压抗磨性好。经比较,Ⅰ中采用十二胺衍生物(Ⅰ-4)时,其极压抗磨性最好(WSD=0.38mm,P_B=1176N,铜片腐蚀结果为1b),它在基础油(750SN)中最佳用量为2%(wt)。用差热分析、红外光谱和俄歇尔电子能谱初步研究表明:磷氮剂(Ⅰ-4)的作用机理是在摩擦表面形成一种含有磷酸铁的化学保护膜。