某供用电综合楼地下基础底板堵漏防水技术

结合工程概况，分析了负二层地下基础底板渗漏的原因，介绍了防水堵漏方案的设计与优选以及主要施工工艺，实践证明，该工程堵漏防水技术可靠，效果良好，保证了工程的顺利进行。     

县级城镇CATV系统工程总体技术方案

改造CATV网络系统必须有一个规范的设计方案，对网改设计方案进行探讨，提出网络设计的依据和原则、规划思路和技术方案以及安全性能要求，使网络改造后能有效地开展多功能服务。     

基于椭圆曲线上EIGamal公钥体制的数字签名方案

论文提出了基于椭圆曲线上EIGamal加密体制的数字签名方案，并出于安全性的考虑进行了一点改动。另外，应用了Tate配对对签名进行验证。     

旋转喷淋式干红发酵罐的设计及改进方案

介绍了一种实用新型干红葡萄酒发酵罐。它利用设置在罐顶的旋转喷淋装置对浮于液面上的葡萄皮进行间歇喷淋。解决了葡萄皮由于长期与空气接触而变质发霉的问题。与上次介绍的压板式干红葡萄酒发酵罐的区别在于：它具有制造难度小、生产成本低、维护容易等优点。适用于中小型葡萄酒厂的推广与应用。     

海水泵房土石方开挖及大围堰施工回顾

着重说明海水泵房临海的大围堰工程是厂区土石方开挖和厂房施工的先决条件之一。外方设计方案偏离厂址实际情况 ,存在许多施工难题。中方根据厂区实际情况 ,提出新的施工方案 ,不仅保证了1 998年 6月 8日第一罐混凝土施工 ,还节约了几百万资金     

一种在秘密共享中骗子的检测方案

提出了一种能正确确定欺骗者的方案。此方案具有在验证时运算简单、快速的特点。对此方案的攻击如同大数分解一样困难。     

Multicast key distribution schemes based on Stinson-Van Trung designs

The efficiency characteristics of multicast key distribution schemes based on (v, b, r, λ)-designs are investigated. The stability and connectivity of such designs are estimated. These estimates generalize and enhance the well-known estimates for the efficiency characteristics of multicast key distribution schemes based on incomplete block designs. __________ Translated from Kibernetika i Sistemnyi Analiz, No. 3, pp. 100–111, May–June 2007.     

The Horace Method for Error-Correcting Codes

Here we apply the so-called Horace method for zero-dimensional schemes to error-correcting codes on complete intersections. In particular, we obtain sharper estimates on the minimum distance.     

EFFECT OF CRACKING REACTIONS KINETICS ON THE MODEL PREDICTIONS OF AN INDUSTRIAL FLUID CATALYTIC CRACKING UNIT

Fluid catalytic cracking (FCC) is one of the most complex processes in the petroleum industry. The large degree of uncertainty in the kinetics of the cracking reactions and catalyst deactivation by coke deposition in the riser reactor are among several factors that contribute to the process complexity. The model developed by the authors (Ali and Rohani, 1995) is used lo investigate the effect of the three-lumped kinetic scheme (Weekman and Nace, 1970) and the four-lumped scheme (Lee ct ah, 1989) on the model predictability and reliability. The effect of changes in the catalyst circulation rate, gas oil feed rate, and oxygen feed concentration on various process variables is compared. It is shown that the three-lumped kinetic scheme, despite its extensive use in the literature (McFarlane et ah, 1993; Elnashaie and Elshishini, 1993; Theologos and Markatos, 1993; Arandes and de Lasa, 1992; Lopez-lsunza and Ruiz-Martinez, 1991), leads to erroneous results and should not be used in the dynamic simulation of the FCC units,