多通道温度自动测量存储系统的设计与实现

为解决工业生产中对环境温度进行多点精密测量和温度数据自动存储的需求.以MSP430F449为控制器,Pt1000为温度传感器,设计了单电桥恒压源方式的四通道温度检测电路,以SD卡为存储介质,完成了SD卡的硬件电路设计和底层驱动,以及基于FAT16文件系统的温度数据存储设计.给出了测温单元、存储单元、数据发送显示单元和辅...     

ATmega128L单片机的Micro SD卡读写

针对电脑横机控制系统对花型文件数据存储的要求,在ATmega128L单片机基础上采用Micro SD卡实现嵌入式文件系统。文章介绍了Micro SD卡的特点、FAT文件系统、SPI模式协议以及硬件接口的实现。通过ATmega128L的SPI模式与Micro SD卡进行同步数据传输,实现Micro SD卡的读写,以FAT32文件格式建立相应的文件系统,把数据以文件方式写入Micro SD卡。通过单片机向Micro SD卡发送读写扇区命令,完成文件的创建、打开、读写、删除等操作。     

基于SD卡的低功耗多通道内记系统设计

给出一种应用于低功耗数据采集仪的SD卡设计方案,该方案选用高性能单片机C8051F020作为主控制器,采用SPI总线接口方式与SD卡相连,引入了FAT16文件系统来管理存储在SD卡上的数据。讨论了系统硬件接口和软件设计。     

基于AT89S52和FATl6的SD卡读写系统设计

采用SD卡的SPI通信模式,用单片机编程模拟SPI总线时序,实现AT89S52对SD卡的读写。利用晶体管加下拉电阻的方法实现SD卡与AT89S52的电平匹配。介绍了SD卡接口规范,SD卡SPI接口时的指令与响应时序。详细介绍了FAT16文件系统的文件组织与存储原理,以及SD卡指令结构。研究了软件模拟SPI接口时序的编程实现,给出了软件模拟SPI接口的汇编代码,以及单片机读写SD卡和读写FAT16文件系统的软件流程。     

存储卡 KINGMAX SDHC卡

随着消费类电子产品性能的提高,数据容量也越来越大。以往的SD卡最大只能做到2GB的存储容量。为了满足未来高清晰影像记录的需要,为用户提供更大的容量与更高的读写速度,基于SD存储卡规范2.00版的SDHC卡便蕴育而生。与SD卡相同,SDHC卡的外形尺寸同样是32mm×24mm×2.1mm。而SDHC的一个主要变化就是将文件系统升级为FAT32,突破了现有SD卡的2GB限制,以4GB作为起始容量,最大可扩展至32GB。由于文件系统的变化,SDHC卡将不能在传统的只支持FAT12/16的设备上使用,而是需要在标有SDHC标记的设备上使用。不过在标有SDHC标记的设…     

基于MSP430F1611和SD卡的心电数据存储系统的低功耗设计

系统基于高集成度、低功耗的MSP430F1611单片机,利用SPI总线与SD卡通信。在单片机RAM较小的情况下,平衡SD卡存储速度、所需RAM以及系统功耗,设计优化的FAT16文件系统,实现对SD卡的数据写入。将该设计应用于便携式心电监护仪上,完全满足48h 256Hz心电采样时间和频率的要求,实现了对心电数据的实时保存。     

大容量SD卡在海洋数据存储中的应用

设计了一种新型海洋要素数据（温度、盐度）采集系统的SD卡存储方案,同时给出了SD1.x与SD2.0的识别方法。该方案选用基于Cortex-M3内核的高性能处理器STM32F103VB作为主控制器,采用SPI总线与SD卡通信,使用FAT32文件系统,解决了海洋数据采集过程中数据存储量大、存储设备不易与PC机接口的问题。     

嵌入式SD卡存储器的设计

介绍了由ARM芯片LM3S615与SD卡构成的SD卡存储器的设计。讨论了系统的硬件设计及包括驱动程序与应用程序的软件设计,实现了FAT16文件系统下的数据存储功能。该存储器具有较高的传输速度,能实现可靠的数据存储,已运用在大地电磁接收机、质子磁力仪等野外地质仪器的设计中。     

SD卡在记录汽车CAN总线数据中的应用

提出了用SD卡来实现记录汽车CAN总线数据的设计,介绍了基于LPC2368的SD卡FAT文件系统的实现方法,并给出了该设计的硬件接口与软件实现,阐述了SD卡应用于大容量数据记录的优点.     

HCS12X单片机的SD卡FAT文件系统读写设计

基于HCS12X单片机SPI模块读取Micro SD卡与SD卡,并解析SD卡上FAT文件系统以实现文件的读取与写入。测试证明,系统对FAT文件系统的读取稳定,误差小,速度较快。使用HCS12X类单片机对SD卡进行读取,在汽车智能设计和单片机调试方面有较高的应用价值。     

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。     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。