一种新的前向安全数字签名方案

指出文献［1］中的前向安全数字签名方案由于使用了后继私钥的信息来签名,尽管签名私钥是前向安全的,但签名却不是前向安全的,提出了一种新的前向安全的数字签名作为替代。该方案只使用了当前的私钥信息对消息进行签名,签名的前向安全性同时基于离散对数与模n的平方根。     

Analytical research on intellectual control of yarning characteristics for cotton collocation and rotor spinning

This research deals with the analysis of the characteristics of cotton collocation and the quality characteristics of rotor spinning. To achieve appropriate cotton collocation, the Taguchi method was employed in the experimental design in which the cotton characteristics which were measured with a high volume instrument were used to design the experiment plan according to the relevant orthogonal array. To satisfy the requirements of the modern textile industry, a Rieter open-end (OE) machine was used in the factory to spin the rotor yarn; the yarns thus produced were then measured using an Uster Tester-3, to obtain relevant yarn characteristics. For the characteristic analysis, intellectual control theory was employed to assess the factorial analysis, and the results indicated that, using neural network training and test, the mean square error obtained from the network was below 0.1. Genetic algorithms were also applied to seek one set of optimization characteristics from among cotton quality characteristics. In this way, the cotton properties and the OE rotor yarn characteristics prediction model was structured according to the result obtained by the intellectual control system. The final yarn characteristics were determined by the known cotton collocation conditions. The cotton properties and the OE rotor yarn characteristic prediction model combine the characteristics of neural networks and genetic algorithms by using the evolve perceptron neural network as the basic framework. Compared with the application of a back propagation neural network, it possesses better prediction accuracy and faster convergence. The result indicated that this research is applicable configuring the yarn characteristic prediction model system.     

受限模糊规则进化的入侵检测

基于生物进化机理,提出了模糊规则进化的推理方法,并对初始群体产生加以控制,实现受限的模糊规则进化的入侵检测“LEFRIDS”。该方法可以有效控制规则数,加速检测过程,并且由于变异会产生新的规则,使检测规则不断“新陈代谢”,楗高了对未知攻击的检测能力。     

明式交椅的历史演变解析

明式交椅历史演变的过程,是中国古典家具从低矮型家具发展到高型家具的过程,也是中华民族由席地而坐到为垂足而坐,转变起居方式的过程。本文主要从古代家具发展的四个历史阶段解析交椅的历史演变过程,探讨交椅在中华民族起居方式变化中的作用。