μC/OS-Ⅱ在ARM平台上移植的深入探讨

在以S3C2410处理器的嵌入式平台上,把经典的vivi启动代码与μC/OS-Ⅱ操作系统结合在一起,探讨了μC/OS-Ⅱ的移植实现,尤其详述了在ARM处理器ISR中断模式下如何实现断点数据保护的方法.利用该方法,可以将一般ARM系统的启动代码同μC/OS-Ⅱ操作系统融合起来,对于μC/OS-Ⅱ操作系统在ARM平台的推广和μC/OS-Ⅱ操作系统的研究都很有意义.     

基于ARM的简易低频幅频特性测试仪的设计

本文设计实现了基于ARM微处理器和实时操作系统μC/OS-Ⅱ的简易幅频特性测试仪,给出了硬件结构图和用户任务函数。充分利用了ARM7系列微处理器的强大功能,最大程度的减少了外围电路,降低了系统的功耗。并成功地在微处理器上移植了实时操作系统μC/OS-Ⅱ,提高了系统的稳定性。     

基于ARM7的μC／OS-Ⅱ移植分析与实现

从不同以往的实时内核概念出发,研究了μC/OS-Ⅱ内核组成结构,包括了抢占式任务调度、任务间通信等高级功能.分析了ARM7处理器的移植关键逻辑部件,并通过μC/OS-Ⅱ内核对于ARM7处理器相关文件代码的移植分析和详细探讨,明晰了μC/OS-Ⅱ内核在ARM7处理器移植过程中的重点和难点问题.制定了严密移植代码调试步骤并且证明了移植的正确性,移植方法对ARM应用的操作系统移植具有普遍的指导意义.     

μG/OS-Ⅱ在ARM7微处理器上的移植

文章研究了源代码开放的实时操作系统μC/OS-Ⅱ在目前流行的嵌入式微控制器ARM7TDMI上移植的方法,指出了在μC/OS-Ⅱ移植过程中的重点和难点问题.     

μC/OS-Ⅱ在S3C44B0X处理器上的移植

介绍实时操作系统μC/OS-Ⅱ的特点和内核结构,给出μC/OS-Ⅱ在Samsung嵌入式S3C44B0X ARM7微处理器上的移植的步骤及详细相关代码,同时阐述μC/OS-Ⅱ在应用中应注意的问题.     

轻型PPP协议在μC/OS-Ⅱ操作系统中的实现

针对实时操作系统μC/OS-Ⅱ没有自己的网络协议栈,提出了基于ARM7TDMI处理器的μC/OS-Ⅱ操作系统上轻型PPP协议的设计与实现.对μC/OS-Ⅱ与处理器相关的代码部分进行了修改与编译,实现了μC/OS-Ⅱ在ARM开发板上移植,为PPP协议的设计与实现提供了系统软件开发平台.通过编写了PPP协议main主模块、LCP模块、PAP模块、NCP模块和PPP等模块代码.在μC/OS-Ⅱ操作系统中实现了轻型PPP协议.通过测试,验证了ARM开发板的PPP协议的网络通信功能.     

基于ARM和μC/OS-Ⅱ的电液比例控制系统的设计

针对传统电液比例控制系统的性能较差，本文提出了一种基于ARM和μC／OS—Ⅱ的电液比例控制系统的设计，并详细介绍了以ARM内核微控制器LPC2292和电机驱动芯片LMD18200为核心的硬件电路，以及嵌入式操作系统μC／OS-Ⅱ在ARM7上的实现。     

实时操作系统μC/OS-Ⅱ在ARM7上的移植

本文分析了实时操作系统μC/OS-Ⅱ的特点及其在嵌入式系统应用领域的优势,讨论了其在S3C44BOX上移植的可能性,探讨了μC/OS-Ⅱ操作系统移植到ARM7处理器S3C44BOX的方法,成功地将μC/OS-Ⅱ移植到S3C44BOX上,并通过例程验证了移植代码的正确性.     

基于ARM的嵌入式操作系统μC/OS-Ⅱ的移植

介绍了μC/OS-ⅡRTOS的内核结构和任务管理,阐述了ARM嵌入式芯片的体系结构,给出了基于ARM的嵌入式操作系统μC/OS-Ⅱ的移植方法,运用UML系统建模的方法完成了从需求分析到设计实现全过程的标准化设计。     

在ARM上移植μC/OS-Ⅱ的若干问题研究

以UP-NETARM2410嵌入式开发平台为硬件,介绍了嵌入式实时操作系统μC/OS-Ⅱ移植条件,阐述了μC/OS-Ⅱ在ARM微处理器(以S3C2410为例)上的移植过程中的几个重要问题,经过测试,表明系统移植成功.     

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.