汽车胎压监测系统的设计及其通信抗干扰研究

针对大多数直接式汽车胎压监测系统组件集成度低、体积和功耗较大等问题,提出了一种基于短距离无线通信ZigBee技术的新型胎压无线监测系统的设计。主要采用TI的CC2530芯片和英飞凌SP12集成式数字传感器,实现对汽车轮胎内部状态的实时监测。采用软硬件协同设计以降低系统功耗,并通过多点轮询通信方式和ZigBee高级加密设置保障了其无线通信的抗干扰能力。     

基于ARM及无线传感器的轿车胎压监测系统的设计

介绍了轮胎压力监测系统的硬件及软件设计方法,阐述了基于英飞凌SP30传感器和TDK5100F射频发射芯片的轮胎监测模块设计方案和基于EasyARM1138和TDA5210射频接收芯片的中央主机接收模块的设计方案,实现了根据不同的异常情况发出相应的声、光报警,直至轮胎压力和温度恢复正常,并优化数据处理算法减小系统功耗,延长使用寿命,对胎压监测系统的普及和性能优化有重要意义.     

基于LabVIEW的胎压监测系统设计

车辆轮胎是全车重要的部件之一,胎压是影响车辆轮胎性能的因素之一,胎压的变化对车辆的行驶性、通过性、舒适性和安全性有直接的影响。基于此设计了一款胎压监测系统,设计了监测系统基本功能,选择合适的系统硬件,基于LabVIEW软件对胎压监测系统进行了编程设计,对编程得到的上位机软件进行了模拟测试,可实现胎压实时数据监测。     

汽车胎压监测系统的设计与实现

汽车胎压监测系统(TPMS)被誉为新一代汽车高科技安全配备用品.针对当前汽车胎压监测系统(TPMS)不能全天候监测轮胎状况以及车辆不能进行远程报警的问题,提出了一种基于nKF9E和GSM模块的新型胎压监测系统的设计方案.介绍了系统的总体结构,从软硬件两方面描述了系统的设计实现方法,重点描述了系统的低功耗设计和按键显示轮胎定位的方法.该系统不仅能够实时监测轮胎状况,对异常情况进行报警提示,并能通过GSM模块通信通知车主,而且具有车载CAN网络接口,在低功耗、可靠性以及安全性方面具有一定优势.     

胎压监测系统研究与应用

介绍了TPMS结构和原理,给出了基于MPXY8020A传感器的胎压监测系统实现的关键技术.该系统可实时监测每个轮胎内部的实际温度、压力和电压,确定故障轮胎并实时报警,有效避免爆胎事故的发生.     

汽车胎压智能监测系统研究与实现

设计出低功耗、低成本、高精度的胎压监测系统TPMS是成功实现产业化应用的案,给出了基于摩托罗拉MPXY8021A传感器的汽车轮胎智能监测系统实现方法,并成功应用到某型号产品中,运行状况良好.     

汽车胎压监测系统发射模块设计

汽车轮胎压监测系统（TPMS）可以对轮胎眙内气压、温度提供预警,以保障行车安全。本文以英飞凌公司的传感器SP12为核心开发出TPMS的发射模块,介绍汽车胎压监测系统发射器的电路设计和解决方案。     

通用型嵌入式数据库模型的研究及其在TPMS中的应用

针对嵌入式数据库特点,提出了一种具有通用性的嵌入式数据库模型,对该模型的结构进行了一定的研究.并将该模型在汽车轮胎胎压实时监测系统(TPMS)中加以实现.讨论了针对TPMS嵌入式数据库的硬件设计、文件组织、物理结构以及逻辑结构等.为该系统建立了可靠性高,实时性好和使用方便的数据库,取得了较好的效果.     

蓝牙4.2协议芯片BlueNRG-1的低功耗蓝牙通信设计

针对传统蓝牙通信系统设计中存在的电路设计复杂、功耗大、速率低和性价比低等问题,提出了一种基于蓝牙4.2协议的BlueNRG-1芯片蓝牙通信系统设计方案.首先,介绍了BlueNRG-1芯片的内部结构和功能;然后,进行了系统的硬件电路和控制程序的设计;最后,进行试验.试验的结果表明,该方案降低了功耗,简化了电路,具有体小便携、功耗低、性价比高、传输速率高和使用寿命长等优点.     

Atmel推出拥有卓越RF性能的智能RF接收器IC系列

Atmel公司推出专为汽车和智能射频（RF）市场设计的全新系列低功耗、高性能RF接收器。凭借极低的功耗、极高的灵敏度和卓越的带外阻塞性能,三款新的设备（ATA5781、ATA5782和ATA5783）将成为众多汽车应用的理想选择,其中包括：遥控无钥匙门禁系统（RKE）、被动门禁启动系统（PEG）／被动门禁、被动启动系统（PEPS）、遥控启动系统（RS）和胎压监测系统（TPMS）。     

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.