间二甲苯氧化反应器建模及模拟

为深入了解间二甲苯(MX)氧化反应器特性,构建了MX氧化制备间苯二甲酸(IA)的连续气液固三相搅拌釜工业反应器数学模型,并利用Aspen Customer Modeler(ACM)软件平台对该模型进行求解。在模型计算结果与现有工业装置运行数据符合良好的基础上,进行反应器的放大预测,设计了年产150 kt IA的MX氧化装置,并利用计算机实验进行因素考察。计算结果表明,在考虑实际生产设备操作要求的情况下,催化剂浓度的增大、反应压力的升高和反应器内含水量的降低,都会使MX氧化反应转化率及IA收率提高,液相间羧基苯甲醛(3-CBA)质量分数下降,但副反应消耗增大。     

Effect of creep deformation on Z phase formation in Gr.91 steel

Abstract

In order to make clear the effect of creep deformation on Z phase formation in Gr.91 steel, creep interrupted tests were performed for 10?000, 20?000, 30?000, 50?000 and 70?000 h at 600°C under 70 MPa. The time to rupture was 80?736·8 h at 600°C under 70 MPa. Z phase was observed in the vicinity of prior austenite grain boundaries in the grip and gauge portions after creep deformation for 10?000 h and more. Number density of Z phase particles increased with increasing creep time in the grip and gauge portions. The number densities of MX carbonitrides particles in the grip and gauge portions clearly started to decrease after 30?000 h corresponding to increase in number density of Z phase. In the gauge portion, the number density of MX carbonitrides particles was almost the same as that of Z phase particles after creep rupture, meaning that a large number of MX carbonitrides particles were disappeared. The number density of Z phase particles in the gauge portion was 2·5 times of that in the grip portion after creep rupture. This indicates that creep deformation promotes the Z phase formation.     

Flash MX中"线-线"动画遮罩特效

根据Flash MX填充特效．绘制立体效果的红星：根据Flash MX的动面遮罩．制作线-线动面遮罩的特效．最终合成熠熠生辉的红星。     

通过Dreamweaver MX2004的操作实现动态信息发布系统的设计

传统的信息发布系统主要是通过采用网页编辑工具结合编写某种动态技术的源代码来实现的,本文详细的介绍了如何通过DreamweaverMX2004的操作来代替手写代码,进而实现基于ASP技术的信息发布系统。     

Dreamweaver MX扩展

讨论了什么是扩展，并以实际例子对如何进行工具栏的扩展进行了探讨。Dreamweaver MX的工具栏。可以根据自己的需要去添加相应的菜单，这样应用起来就会方便很多，也会使自己的Dreamweaver MX很具有个性。描述了扩展的实现方法。     

一种开源嵌入式Linux集成开发环境定制

嵌入式软件交叉编译和调试环境要求编辑和编译软件在主机上进行,编译好的软件在目标机上运行,同时,主机和目标机建立起通信连接,并传输调试命令和数据。首先介绍了一种以GNU工具链为核心的开源嵌入式集成开发环境Eclipse/Target Builder/Esto系统,然后讨论了其结构框架和功能,最后以Motorola M9328MX1ADS开发板为例,详细介绍了构建Eclipse/Target Builder/Esto开发环境的具体方法以及为开发板定制BSP(板极支持包)的过程。     

基于Muskingum模型的河道洪水演进仿真

采用简化的马斯京根法对河道洪水过程进行初步的演进,并通过在VB.NET框架下运用FLASH技术实现洪水演进的仿真,实现了通过数据库为中介建立交互式洪水演进过程的多媒体仿真系统.     

Flash MX中三维图形动画制作分析

本文在分析了FlashMX中二维坐标计算规则的基础上，介绍了三维图形的表示方法，阐述了FlashMX三维动画制作的基本技巧，并结合具体实例给出了FlashMX下的帧动作脚本。     

Modelling of long-term diffusion–reaction in a bentonite barrier for radioactive waste confinement

Bentonites have been proposed as buffer material for barriers in geological disposal facilities for radioactive waste. This material is expected to fill up by swelling the void between the canisters containing the waste and the surrounding ground. However, the bentonite barriers may be submitted to changes of humidity, temperature variation, fluid interaction, mass transport, etc. This could modify the physico-chemical performance of the barrier, mainly on the interface with the steel container and with the geological barrier. The engineered barrier development necessitates thus the study of the physico-chemical stability of its mineral component as a function of time under the conditions of the repository in the long-term.The purpose of the present study was two-fold. Firstly, it was hoped to simulate the chemical transformations (geochemical and cation exchange reactions) coupled with diffusion of chemical-elements into the engineered barrier under repository conditions by applying a thermokinetic hydrochemical code (KIRMAT: Kinetic Reactions and Mass transport).Secondly, it was hoped to apply a simplified method to estimate the swelling capacity evolution by a volume balance in the fluid-saturated engineered barrier, considering that the decay of swelling capacity is directly proportional on the volume of transformed montmorillonite and, taking into account that it may be partially compensated by the volume of neo-formed swelling clays.The system modelled herein was considered to consist of 1-m thick zone of water-saturated engineered barrier. This non-equilibrated system was placed in contact with a geological fluid on one side, which was then allowed to diffuse into the barrier, while the other side was kept in contact with a source of metallic iron. Reducing initial conditions(P_O2 0; Eh = − 200 mV) and a constant reaction temperature (100 °C) were considered.The results showed that the EB in contact with the geological fluid was highly transformed after 10,000 years, whereas the most significant chemical processes were illitization, cation exchange and saponization, extending up to 20 cm into the EB. Chemical transformations of minor importance in the EB were identified as well, such as a neo-formation of silicates (quartz, cristobalite), anhydrite, laumontite, magnetite and chlorite in the system.A simplified method based on volume balance showed that the swelling capacity of the bentonite barrier is slightly affected after 10,000 years of diffusion–reaction (D close to 1) because the volume of neo-formed swelling-clays is almost directly proportional to the volume of transformed Na/Ca-montmorillonite, except for a strong illitization and/or neo-formation of non-swelling clays. In the present study, this simple approach predicted that the decay of swelling capacity of the engineered barrier is drastically affected close to the geological barrier-engineered barrier interface. Out this zone the swelling capacity decay lies between 5% and 11%.     

基于i.MX27的无线视频监控系统的设计与实现

介绍了一种以i.MX27为硬件平台的处理器,嵌入式Linux为操作系统的无线视频监控系统的实现方案.给出了系统的总体结构与软硬件模块,重点阐述了视频采集及编码的过程;针对i.MX27硬件编码单元输出的H.264视频流,设计并实现了在RTP协议下视频流的实时传输.客户端通过接收、解码及显示监控前端传送的H.264视频流,实时显示监控场景.经实验测试,该系统达到了较好的实时性和可靠性.