TDI生产过程分离序列流程仿真

TDI生产工艺是最复杂的化工生产工艺流程之一.该文主要介绍TDI生产工艺中分离工段的动态仿真.该仿真对TDI各分离塔在一定的简化假设的基础上建立了动态仿真机理模型,保证了仿真结果的适应性和外推性.在求解相平衡常数过程中采用了双层法思想,以简化模型和严格模型分别做内外两层迭代计算,很好地解决了动态模拟中精度与速度难以兼得的问题,仿真效果好.此研究成果已经成功地运用于某化工厂对员工的上岗操作培训,培训效果显著.     

应用程序访问网络的监控研究与实现

介绍TDI及TDI过滤原理,通过采用TDI过滤技术,实现了对应用程序访问网络的监控,并通过测试验证监控的有效性.     

TDI CCD器件电性模拟器的设计

为了解决由TDI CCD芯片供货不及时、容易损坏而又价格昂贵等因素给TDI CCD相机的电路调试阶段的工作带来的不便.设计了一款TDI CCD电性模拟器.此器件采用以高速运算放大器作输入,FPCA作主控,高速DAC作数模转换,高速运放作输出的结构.它能较好的模拟TDI CCD器件电输入输出性能,能在不用TDI CCD芯片的条件下,完成各种相关的实验工作.     

甲苯二异氰酸酯装置危险有害因素分析及安全控制措施

甲苯二异氰酸酯(TDI)装置生产过程中涉及到光气合成及光气化反应,存在多种危险有害因素.通过对国内新建TDI装置的风险评估和劳动安全卫生预评价,辨识出了TDI装置生产过程中可能存在的危险有害因素,并提出了相应的安全控制措施.     

基于数字域的真彩色TDI-CMOS图像传感器实现方法

提出一种可以获得RGB模式真彩色图像的时间延迟积分(TDI)型CMOS图像传感器实现方法。将滚筒式曝光应用于TDI技术,采用先累加、后读出的工作方式加快了图像数据读出速度;采用红、绿、蓝三色滤光片循环排列的彩色滤波阵列(CFA)获得真彩色图像,避免色彩失真;推导并验证了数字域TDI算法。结果表明:TDI级数每增大2倍,图像的峰值信噪比(PSNR)提高3dB。     

农机监理系统及其数据仓库设计

介绍了上海市农机监理管理信息系统的结构、功能及数据库逻辑关系图.根据业务需求提出了农机监理数据仓库的五层体系结构,并对每一层进行了分析和探讨.     

机器人分层分布式控制系统设计与实现

本文针对两轮差速驱动移动机器人设计了一种分层分布式控制系统.系统由上到下分为主控中心决策层、车载PC运算层、下位机驱动子层以及位置反馈子层;主控中心决策层和车载PC运算层之间通过无线网卡进行数据传输;下位机驱动子层和位置反馈子层分别采用独立的单片机对系统任务进行分布式并行处理,并通过串口与车载PC运算层进行通信.该控制系统在移动机器人平台进行运动控制性能测试,结果表明,分层分布式控制方式控制精度高,系统响应迅速;同时该控制系统具有超强的计算能力和二次开发潜力,根据功能需要可在各个子层进行分布式扩展.     

轻量级工作流管理系统架构设计

为了克服传统工作流管理系统的缺点,满足企业流程的自动化和提高企业的市场竞争力,分析了当前工作流管理系统普遍存在的问题和轻量级工作流管理系统架构设计的必要性;搭建了由客户层、表示逻辑层、持久层和数据库服务层组成的多层次工作流管理系统的整体架构,设计了可以根据需要灵活添加和裁减组件的轻量级工作流管理系统核心架构,详细地描述了该架构各个组件及功能,并且基于该架构的系统可以根据具体需求灵活地定制不同领域的工作流管理系统中.     

现场总线体系结构的研究

在讨论现场总线体系结构的基础上,指出了现场总线应该是一种压缩的体系结构,并能与开放系统接口相容.按是否使用网络层和(或)传送层,可构成四种适用的现场总线,并根据功能成本和性能比,选用传送层四层体系结构比较适宜.     

一种TDI CCD的高速驱动电路的设计研究

本文简要介绍了TDI(时间延时积分)CCD的工作原理,研制了针对某型TDI CCD的高速驱动电路,详细地叙述了TDICCD器件的驱动电路设计,选用FPGA为驱动信号源,通过VERILOG语言对驱动时序进行硬件描述,利用ISE软件进行了相应的时序仿真,并针对高速驱动信号的完整性,采用HYPERLYNX软件对驱动电路系统进行了仿真,并最终给出了实际工作时的驱动时序波形,结果显示系统成功的驱动了TDI CCD.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。