16路智能锂电池充电、维护仪设计

在一些手持式电子产品中带有3.6V/7.2V锂离子电池,本文针对3.6V/7.2V锂离子电池的充电器进行了设计。该充电器的主要特点有,首先充电器在单片机8051F330的控制下,具有自动识别充电端口的电池规格,自动完成充电,实时监测充电状态并以充电指示灯指示充电状态。其次充电器具有故障告警和故障保护功能,当电池失效时会以指示灯闪烁告警。最后充电器还具有操作简单、工作稳定、智能可靠的优点。     

车载智能充电器的设计与实现

设计一款车载智能充电器,根据电池容量、当前电压值及电池温度调节充电电流、充电电压及充电时间;并通过充电器闭环拓扑反馈系统实时评估电池状态、对充电流程及模式进行动态调整,确保充电最优化及效率最大化。文章根据车载电池使用说明及充电需求,提出一种智能充电流程,并重新设计工作模式与功能,对充电器的软件及硬件系统进行探索开发。实验结果表明智能充电器不仅可提高充电效率,对电池的寿命维护及安全使用都有巨大改善。     

高频脉冲智能充电器的设计与试验

随着电动自行车的日益普及,充电器的性能更有待完善和发展。本文研究的充电器为36V铅酸蓄电池专用智能脉冲充电器,由高频开关充电电源和单片机两部分组成,整个充电过程中的预充电、快充电、补充充电、涓流充电和停充等五个状态是由单片机控制而自动实现转换,并且设置了温度补偿控制,不仅完善了充电器的性能,而且避免电池出现过充和充电不足现象。     

基于单片机的多功能充电器的设计与实现

本课题主要研究基于单片机的多功能充电器,解决对不同电池的快速充电。通过对ATmega8的深入研究,利用它的高性能,设计完全实现了电池充电器设计的功能。本设计可以通过按键切换,对的密封铅酸电池(SLA)和镍镉电池(NiCd)进行充电,并通过LCD清楚地看到其充电状态。同时利用放大电路和Atmega8本身的AD转换器显示对电池电压和电流的实时测量,以较好的控制充电过程,保护电池。     

专利信息

该充电器的最大特点:不仅能给镍隔电池、仪表电池、钮扣电池充电而且还能给1—5号普通电池快速充电.充电快;耗电省,电池可反复充电100次.它是充电器的更新换代产品,是国家科委大力推广的节能产品之一,此项发明已申报国家专利,它的问世使各种废弃的普通电池可以自由调压,每次可充电二至四节1—5号电池,充一次仅耗电费1分钱,充电器还附有应急夜明灯,在停电、无电时,可供应急照明用,一晚上耗电不过2分钱.该产     

基于MSP430单片机的智能锂电池充电器设计

应用MSP430单片机设计制作了智能化、低功耗、新型手机锂电池充电器,它替代了传统的充电器,能够有效地解决传统充电器在电池充电终止点之后继续对电池进行充电的问题,从而减少了安全事故的发生。     

脉冲式自动充电器的制作

本文介绍的充电器能对2节(或4节)镍镉电池进行脉冲式充电,在两个充电脉冲之间,进行一次放电,以消除电池的“存贮效应”,延长电池的使用寿命。充电时间和放电时间之比为5:1。电池充满后,自动转为涓流充电状态。     

基于8xC749单片机的电动自行车智能充电器的设计与实现

介绍以PHILIPS公司的8xC749微处理器为核心的智能充电控制器的控制原理,讨论充电器的硬件结构和各主要组成部分的设计思想,并介绍智能充电器中的两种新技术：均衡充电和脉冲充电.结合铅酸电池对充电器的控制算法进行探讨.     

单体锂离子电池应用充电器IC的选择

单体锂离子(Li-Ion)电池充电器的设计过程中必须权衡多方面因素:解决方案尺寸、USB标准、充电速率和成本等.将介绍不同的充电拓扑结构,并研究电池充电器IC的一些特性.此外,还将探讨一个现有的应用解决方案.     

便携式多功能充电器的设计

本文提出了一种便携式多功能充电器的设计方案。该充电器支持220V交流电、12V直流两种充电方式。使用12V铅酸电池,支持交流电220V输出、直流电12V、5V输出。对电池最大功率跟踪以及电池充电曲线控制,以延长产品的使用寿命,提高产品的性能。可通过蓝牙与手机或pad连接,对电池输出进行控制,并监控电池的状态。该设计可用于家庭旅游野外使用。     

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。