可现场GPS定位的手持式γ能谱仪的设计

针对目前现场γ能谱测量仪需要满足便携式、低功耗、高灵敏度等应用要求，设计了一款基于C8051F340片上系统微处理器的手持式现场γ能谱仪。该能谱仪采用低功耗的电源设计方案，并集成GPS现场定位功能；同时，采用软硬件结合的方式实现γ能谱测量的自动稳谱。其系统结构采用多功能一体化的设计方案，非常适合野外现场工作。高灵敏度γ能谱的实验结果验证了系统设计方案的可行性。     

MMC在便携式数据采集系统中的应用

介绍了多媒体卡MMC的工作原理、MMC的串行外设接口协议模式及在大容量便携式数据采集系统中的应用,最后给出了PIC16F73B微处理器与MMC的接口设计。     

基于USB接口和I~2S总线的控制系统设计

指出便携式是数字化仪器的发展方向之一,介绍了一种便携式控制系统的设计实例。给出了一种基于USB接口和I2S总线的控制系统的结构并予以实现,主要介绍了控制系统的数据采集部分。数据采集部分采用AD7862芯片,具有高速的数据采集能力,可编程逻辑CPID的采用,使得系统具有较强的可扩展性。其设计思想不仅可以用在A/D变换上,同时也可以用在D/A、数字I/O等控制场合。     

TUSB3200和I2S总线在小型实时控制系统中的应用

介绍一种便携式小型控制系统的设计实例,便携式是数字化仪器的发展方向之一.给出了一种基于USB接口和I2S总线的小型控制系统的结构并予以实现,主要介绍了控制系统的数据采集部分.数据采集部分采用AD7862芯片,具有高速的数据采集能力,可编程逻辑CPLD的采用,使得系统具有较强的可扩展性.其设计思想不仅可以用在A/D变换上,同时也可以用在D/A、数字I/O等控制场合.     

基于XLP技术的超低功耗数据采集系统设计

针对目前便携式气体浓度数据采集仪体积大、功耗高以及功能单一等缺点,采用Microchip公司基于XLP技术的低功耗器件—PIC16F193X设计了一款多功能、小体积、低功耗的便携式数据采集仪。本文首先分析了整个系统的硬件低功耗设计原理,然后针对系统的低功耗特点,进行了低功耗的软件程序设计。整个软件采用了基于有限状态机的设计,最后对整个系统进行了低功耗特性测试,测试结果表明采用这种设计方法比传统的设计方法能延长便携式数据采集仪的工作时间6倍以上。     

便携式微功耗数据采集系统专用电源模块

便携式数据采集系统对电源模块在输出质量和效率上有较高的设计要求。结合微功耗和微型化的总体设计原则，详细介绍了便携式数据采集系统内专用电源模块的设计思路和方法。     

便携式微机故障监测系统中数据流程的研究及实现

本文从数据流程的角度分析了便携式故障监测系统的软件构建，特别就数据采集，数据入库，数据访问及数据维护的关键技术进行了探讨，并给出了实现的示意性代码。     

基于USB总线接口的数据采集系统

提出了一种利用USB总线接口的数据采集系统的设计方案,并给出了系统的硬件与软件的具体实HA-法.通用串行总线作为一种崭新的微机总线接口规范,其特点十分适合应用于高速数据采集系统.本文将USB连接技术引入到测试测量中,成功研制了一套接近实用的便携式多功能高速数据采集系统.文中介绍了一种基于USB接口的数据采集系统的设计.包括硬件设计、固件设计、基于WINDOWS驱动程序模型(WDM)的设备驱动程序设计以及应用软件的设计.     

基于USB接口便携式数据采集器的设计

本文简单地讨论了串行总线(USB)技术在便携式数据采集器上的应用,详细介绍了系统的硬件、固件、驱动程序以及应用程序的设计方法,最后给出了其性能调试结果。     

应用RFID的便携式数据采集与处理系统的研究

本文介绍了一种应用RFID技术的便携式数据采集与处理系统,给出了其工作原理及硬件组成,详细阐述了其软件设计中的两大关键技术,预测了其应用前景.     

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.