交通视频监控系统中DSP 的PCI接口设计

描述TI公司媒体处理器TMS320DM642HPI的主要特点,介绍PCI桥接器PCI2040的结构原理,提出通过PCI2040实现TMS320DM642与PC/104 模块进行通信的设计方案。方案充分利用PCI总线的高数据吞吐能力和DSP的HPI接口功能,可在DSP和PC/104 模块之间实现较高的数据传输率,实现了PC/104 实时读/写DSP任意片内存储单元的内容。最后给出交通视频监控系统的设计方案,详细说明通信过程的软件编程。     

基于MPC8280的HPI接口设计

通过对TI公司TMS320C6416 DSP HPI接口时序和MPC8280总线时序的分析,以Verilog HDL语言为工具,使用Altera的CPLD芯片MAXII-1270,设计实现MPC8280系统60x总线和TMS320C6416 DSP HPI总线之间的通信接口,给出与整个接口设计相关的Verilog HD...     

PC/104总线与TMS320VC5402 HPI口通信的解决方案

介绍了TI公司信号处理芯片TMS320VC5402HPI穴主机接口雪的结构及主要特点,提出了HPI接口与PC/104总线进行通信连接的设计方案。该方案充分利用DSP的HPI接口功能,实现了主机实时读/写DSP任意片内存储单元的内容。     

基于PC104和DSP的分布式导航计算机设计

单独采用PC104不能很好的实现多传感器的数据采集和导航解算双重任务,本文基于PC104的堆栈式结构,以TI公司TMS320F28335浮点DSP为核心处理器设计了一款双CPU、分布式、小型化的导航计算机。通过PC104总线扩展MOXA多串口卡实现微惯性测量元件MIMU和GPS的数据采集,而在DSP中完成导航算法和组合导航参数的解算。PC104与DSP之间的高速数据通信通过扩展双端口RAM实现,系统地址的逻辑选通和时序的控制通过CPLD实现     

研扬科技发布嵌入式主板PCM-8152

研扬科技推出一款带有系统转接接口的嵌入式主板PCM-8152。该模块配有PC／104接口，还配备Intel Pentium M、Celeron M或移动Intel Celeron处理器、FSB400MHz。     

基于TI C6X系列多处理器的HPI与VME64总线DMA接口设计

提出了一种基于地址映射的TI C6X系列处理器与VME64总线接口的DMA实现方法.设计了基于DMA方式的TMS320C6X DSP各VME64接口互连逻辑.所有模块均采用VHDL语言进行设计,并在FPGA上实现.实验和工程实践证明,采用DMA方式的设计方案比采用直接读写HPI口的方案访问速度快4倍以上.     

视频监控系统中ARM与DSP的HPI接口设计

本文介绍了ARM S3C44BOX与DSP TMS320DM642的主要特点以及HPI接口的原理,提出了一个采用HPI设计ARM与DSP通信接口的方案.该方案应用在基于ARM与DSP的嵌入式视频监控系统的设计上,在两者之间建起一个高速数据通道,进一步提高了视频监控设备的性能.     

基于CAN总线与RS-485的DSP通信接口设计

本文研究了基于CAN总线与RS-485的DSP通信控制原理和接口设计方法,介绍了以PC机为主机以TMS320LF2A07为从机,主从机之间基于RS-485的串行通信,以及TMS320LF2407与CAN总线的通信接口设计.     

基于TMS320VC5402的点火线圈测试系统

本文主要介绍一个点火线圈数据采集处理系统的设计。该系统以PC机作为上位机，利用DSP高速采集现场数据，并通过HPI主机通讯接口利用PCI9052与上位机PCI总线进行通讯，可以满足大量实时数据的处理要求。     

一种互补型多处理器系统中OS间通信接口设计

介绍了PXA255、TMS320DM642和SM501嵌入式多处理器的主要特点以及主机接口（Host Port Interface,HPI）的原理。提出了一种基于互补型多处理器系统中操作系统间的通信接口设计方法。以一个集成3个嵌入式微处理器于单板的嵌入式多媒体系统为硬件平台,叙述了运行在数字信号处理器（DSP）上的实时操作系统μC/OS-II 如何通过DSP的HPI与运行在ARM处理器上的Linux操作系统进行任务通信和数据传输的实现过程。     

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.