集散式物料发放计量系统的数据采集与网络通讯

论述了在WindowsNT环境、多串行口通讯状态下,集散式物发放计量系统的数据采集与网络通讯的原理和实现方法。叙述了系统的软硬件实现方案。该系统基于WindowsNT平台上,用MOSA卡扩展串行口。使用VFP6开发工具。利用MSCOMM32．OCX与Winsock控件实现上下位机的串行端口通讯以及上位机与服务器的的通讯,实现数据采集与管理同步,对提高发货系统自动化水平具有较大的实用价值。     

基于微处理器的经济型数据采集平台设计

本文研制了一种低成本基于微处理器的经济型数据采集平台.完成了总体方案设计与数据采集平台各部分的硬件设计工作,对系统DSP最小系统,AD转换电路、以及系统显控和上位机通讯电路三部份进行了详细的设计,开发设计了基于微处理器的经济型数据采集平台的监控软件,包括AD采样软件、键盘接口显示软件、以及串行口通讯软件.最后,对采集到的信号进行了数字滤波预处理.     

利用C++Builder与Matlab实现实时数据的获取与处理

针对航空电气系统实时数据采集环境的复杂性,介绍了采用PC机模拟航空电子公管系统,利用C++Builder完成人机交互界面的设计以及数据的获取与处理;在Borland C++Builder 6环境下,利用其功能强大的图形化控制界面,及MSComm控件在串行口下编程,实现上位机与DSP的SCI通讯模块的通讯;结合Matlab实现供电系统设备状态数据的处理,并通过建立Access数据库,在BCB6中实时存储处理供电系统的各部分状态信息。     

Windows98下远程数据采集系统设计

在数据采集系统中,常利用PC机串行口通过串行通信,实现远程数据采集.介绍了某一远程数据采集系统的设计过程、方法以及该系统的硬件构成,并利用Visual C++ 6.0在Windows98环境下,编写了相应的通信及控制程序.     

改进的基于INTERNET的ID餐饮收费系统

本文在原有的ID餐饮收费系统的基础上提出了ID餐饮系统服务器的概念模式,利用单片机、串行口、网络控制芯片结合Internet技术实现基于INTERNET的ID餐饮收费系统的通用低成本解决方案。单台服务器通过单条或多条RS485总线与系统中的餐饮机、发卡机和存款机实时通讯,服务器与计算机的通讯采用以太网,通过TCP/IP进行数据交换。     

Windows下远程数据采集系统设计

在数据采集系统中,常利用ＰＣ机串行口通过串行通信,实现远程数据采集。介绍了某一远程数据采集系统的设计过程,方法以及该系统的硬件构成,并利用ＶｉｓｕａｌＣ＋＋６．０在Ｗｉｎｄｏｗｓ９８环境下,编写了相应的通信及控制程序。     

巧用PC机串口进行控制应用：PC机串行口（COM）实验器

PC机的串行通讯口常被称为COM口,是用于将各种串行设备与PC机连接的通讯接口。串行口可以连接的设备的复杂程度变化很大。从读取状态的几个简单的开关,到几台计算机间通讯的复杂系统。这里介绍的电路就是一种用于实现各种简单I/O功能的实验电路。     

多复杂异构系统的信息融合

μXL集散控制系统、Bently振动监测系统和WindowsNT计算机网络系统是各自相对独立、结构不同的复杂系统.本文利用LabWindows/CVI虚拟仪器开发平台,采用虚拟仪器技术,以μXL网卡为媒介,借助于MS-Excel,通过动态数据交换手段实现了PC机自动、连续、自主地从μXL系统获取数据,并通过高速数据采集卡,从Bently振动监测系统同步获取多通道振动信号,以WindowsNT网为纽带,实现了Bently振动监测系统、μXL集散控制系统和WindowsNT计算机网络系统的多复杂异构系统的信息融合,并结合工程实例,详细讨论该方法的具体应用.     

基于LabVIEW的单片机多路数据采集系统的设计

本文运用虚拟仪器的设计思想,介绍了一种基于LabVIEW软件平台的多路数据采集系统的设计原理及过程。数据采集部分摒弃了NI公司的采集板卡而采用MSP430F149单片机系统,降低了系统的开发成本。利用LabVIEW开发环境设计上位机的监测界面,上位机通过串行口与MSP430F149单片机通信,从而实现对多路数据的采集与监测。本设计系统增设有报警功能,报警门限可通过上位机监测界面进行设置。运用LabVIEW进行系统开发具有很强的灵活性,能较容易地实现系统的各项功能,并使系统具有很强扩展性。     

利用单片机实现 EPROM 编程的新途径

本文介绍利用微机与单片机的串行通讯,实现 EPROM 编程。它适用于带有串行口的微机。文中以 PC 机为例,单片机选用 MCS—51系列的8031芯片。此编程器作为微机的附属设备,利用微机串行口与之通讯;在管理软件控制下,利用键盘操作实现EPROM2716、2732、2764、27128、27256的写入、读出及其它功能,操作灵活,现已投放市场。     

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.     

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。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.