单片机无线数据传输接口C程序设计

介绍一种抗干扰能力强的单片机无线数据传输接口的工作原理与软件设计.主控芯片采用AT89C51单片机,通信方式采用抗干扰能力强、可靠性高的DTMF信号和单工调频的无线通信方式.十六个DTMF信号码作为信息帧的十六种位码,以及采用校验码进行检错和纠错,使数据传输误码率几乎降到为零,极大地提高了无线数据传输质量.软件采用C51模块化设计,可方便地进行移植以实现各种数据的区域无线传输.本接口可应用于实验室大型仪器设备的无线通信自动登记和管理系统,也可应用于无线通信自动抄表系统等.     

基于DTMF信号方式的数据传输接口软件设计

介绍一种抗干扰能力强的 DTMF信号方式数据传输接口的工作原理与软件设计。将 16个 DTMF信号作为信息帧的 16种字段位码 ,同时采用校验码进行检错和纠错 ,使数据传输误码率几乎降到零     

一种星型无线数据传输系统的技术设计

本文介绍了一点对多点星型无线数据传输系统，MCS-51单片机与无线收发模块的硬件接口设计，一点对多点无线通信协议的编写，点对多点无线通信协议的数据打包与解包的程序设计。     

基于USB接口技术的无线通信设计与实现

提出了一种运用USB接口芯片PDIUSBD12、89C51微处理器nRF401、射频收发器构建的无线USB接口,并利用该接口成功地实现了两台计算机之间的无线通信。文中对USB接口电路、无线收发电路的设计,89C51内部固件程序的编写及USB应用程序编写进行了阐述。     

基于USB接口技术的无线通信设计与实现

提出了一种运用USB接口芯片PDIUSBD12、89C51微处理器nRF401、射频收发器构建的无线USB接口,并利用该接口成功地实现了两台计算机之间的无线通信.文中对USB接口电路、无线收发电路的设计,89C51内部固件程序的编写及USB应用程序编写进行了阐述.     

AT89C51单片机在无线数据传输中的应用

介绍无线数据传输系统的组成、AT89C51单片机串行口的工作方式及其与无线数字电台接口的软硬件设计与实现方法。     

AT89C51单片机在无线数据传输中的应用

介绍无线数据传输系统的组成、AT89C51单片机串行口的工作方式及其与无线数字电台接口的软硬件设计与实现方法.     

nRF905模块和SPI接口的点对点无线通信系统

介绍一种利用无线射频收发器nRF905模块①和单片机SPI接口实现的无线数据传输系统;给出单片机PIC16F876控制nRF905模块通过SPI口进行数据交换,以及它们之间电路连接和软件设计方法。该系统数据传输速度快、可靠性高、可移植性强,可广泛应用于各类无线数据通信中。     

RFID低功耗电子标签和手持阅读器设计开发

设计了一种短距离2.4 GHz无线通信方案,基于此方案研制的手持阅读器和低功耗电子标签成功应用于油田设备上。电子标签和阅读器分别由ARM和MSP430系列单片机控制无线收发芯片NRF24L01实现身份识别与数据传输,相关参数由软件进行设置。手持阅读器具有好的人机接口,电子标签具有体积小、功耗低、性能稳定、抗干扰能力强的特点。可在一定距离范围内实现误码率低的快速通信。     

基于AT89C51单片机的家用电器电话遥控装置

本文介绍了一种基于AT89C51单片机的家用电器电话遥控装置,该装置利用双音多频电话机,可以通过电话对家用电器及其工作状况进行控制.它是一种基于DTMF(双音多频)信号的远程智能控制器.它具有振铃检测和模拟摘机,DTMF信号解调和133秒无响应自动挂机的功能.     

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。