龙岩市数字电视用户管理系统建设方案

系统地介绍了龙岩市数字电视用户管理系统的基本状况、建设思路和主要功能,SMS系统的建成推动了数字电视的整体转换,促进了数字电视增值业务的开展。     

Synthesis and purification of trisulphoindigo and reversed-phase high performance liquid chromatographic determination of trisulphoindigo in FD & C Blue No.2

The effect of temperature on product formation during the sulphonation of indigo with concentrated sulphuric acid and 30 % fuming sulphuric acid was studied with the aid of high performance liquid chromatographic (HPLC) analysis. Trisulphoindigo was prepared by the sulphonation of indigo with concentrated sulphuric acid at 160°C. The di- and tetra-sulphoindigo side products formed during the reaction were removed by preparative HPLC to yield a product of high chromatographic purity. The trisulphoindigo content of the food dye FD & C Blue No. 2 and the purity of commercially available trisulphoindigo were determined by HPLC analysis.     

浅谈DVB—C系统在数字电视中的应用

根据DVB—C的原理,提出基于DVB—C的数字电视系统实现方法。阐述DVB前端、条件接收系统（CAS）的加密体系、电子节目指南（EPG）系统方案、宽带传输网络、用户终端DVB接收系统等技术原理和系统组成。同时对DVB-C系统技术方案进行一些技术探讨和总结。     

复杂适应系统的多层级建模研究

针对复杂系统仿真普遍缺乏层级思想,局限于广度模拟的情况,对复杂适应系统（CAS）层级建模进行研究,协同进化理论,从主体平均适应度的角度,分析中间子系统的生成、过渡和演化,得到层级结构产生的内在动因,提出层级CAS演化的数学模型和层级框架。该模型应用于多人重复囚徒博弈,结果证明其能在高N值时形成稳定高合作率。     

青鸟工程及其CASE工具

概要介绍了青岛工程的攻关工作情况,以及“九五”攻关的核心工作：基于构件／构架复用的软件工业化生产平台（青鸟软件生产线系统）,并介绍了部分具有自主知识产权的ＣＡＳＥ工具（系统）。     

基于Agent的空防作战系统建模仿真方法研究

空防作战系统是一类复杂的军事作战系统.从军事作战系统的主导因素入手,讨论了传统研究方法的局限性,进而提出使用基于Agent的建模仿真(ABMS)方法研究空防作战系统的思路,并根据空防作战系统建模仿真应用的需要对ABMS进行了改进:建立了层次化的ABMS建模框架,为解决对作战动态过程的建模而引入了事件的扩展概念及其分析方法.然后介绍了一个空防作战系统建模仿真研究的完整过程,给出了系统动态演化的事件模型和作战单元的Agent模型,并针对仿真结果进行了分析;从而证明了ABMS方法的可行性和有效性.     

基于CAS集群的单点失效问题解决方案

单点登录(SSO)可以消除多个应用服务系统之间的重复认证过程,但会加重认证负载,引起单点失效的风险,导致服务中断。针对上述问题,提出具有集群功能的单点登录系统,将用户登录请求分发到不同的单点登录服务器,解决单个单点登录服务器负担过重的问题,增强系统运行的稳定性。     

基于Agent的城市废物计量收费方案仿真研究

提出一种基于Agent的城市废物计量收费仿真模型.由于城市废物计量收费仿真模型属于复杂适应性系统(CAS),传统的建模仿真方法无法完好地刻画城市废物计量收费仿真模型,而基于多Agent的建模仿真方法(ABS)是当前研究复杂适应性系统的最有利工具之一.有必要进行深入研究.在简单介绍复杂适应性系统、基于多Agent的建模方法的研究概况,以及多Agent建模工具--Repast仿真甲台以及它的结构、主要类库与建模步骤后,以城市废物计茸收费仿真模型为研究对象,进行基于多Agent的建模仿真实验,结果表明基于多Agent的建模仿真方法非常合适复杂适应性系统的研究,具有很大的发展空间.     

The disordered structure of silica zeolite EU-20b, obtained by topotactic condensation of the piperazinium containing layer silicate EU-19

Zeolite EU-20b was prepared by heating the piperazinium containing layer silicate EU-19 in air at 1000 °C. The microporous silica framework of EU-20b forms by topotactic condensation of the silicate layers of the crystalline precursor EU-19. According to the observed diffraction data, the EU-20b structure is closely related to the (orthorhombic) CAS zeolite framework type. However, the diffraction pattern revealed structural disorder of the material as indicated by the presence of sharp and broad reflections. In spite of the disorder, the XRD pattern of EU-20b can unambiguously be indexed based on a C-centered orthorhombic unit cell with lattice parameters a₀ = 13.817(4) Å, b₀ = 4.995(1) Å, c₀ = 16.637 (5) Å. The program DIFFaX was used to simulate diffraction diagrams of various stacking disordered silica-materials made up by layer-like building units. The best fit between simulated and observed patterns was obtained for a probability of about 88% CAS-type stacking and 12% NSI-type stacking. EU-20b is a small pore zeolite characterized by a one-dimensional pore system consisting of straight and non-intersecting 8-ring channels and has a very high framework density of ≈20.8 T/1000 Å³. Although the pore volume of EU-20b is free of organic pore fillers due to the heating process at 1000 °C, nitrogen sorption experiments showed that there is no “free” access to the pore volume. Two effects might block access to the pores: According to ²⁹Si MAS NMR spectroscopy a few defects are probably present caused by incomplete or random condensation of the silanol groups and the elliptical pores are very small in one direction (2.3–2.5 Å) compared to N₂ (kinetic diameter 3.64 Å). Thus, EU-20b is formally porous by topology, but apparently non-porous to N₂.     

Otherwise Engaged: New Projects in Interactive Design

What are the possibilities of interactive technologies delivering a new level of social engagement in architecture? Taking 2002, with the ETH Ada project and Diller & Scofidio's Braincoat project, as an important watershed, Mark Garcia reviews the advances that have been made per se, and with four projects in particular, in socially interactive spatial design. Copyright © 2007 John Wiley & Sons, Ltd.