微尺度金属零部件特种加工技术的研究进展

概述了微细电火花、微细电铸、微细电解和高能束四种类型面向微尺度金属零部件的特种加工技术的原理、应用及研究进展;总结指出,因固有的非接触加工属性,赋予微细特种加工技术工艺柔性好、无残余应力和变形等突出优势,使得在金属微加工/制造领域展现出独特的工艺优越性。     

微机化微库仑分析仪

根据微库仑滴定原理，利用单片机技术实现微库仑滴定分析的智能化。具有自动搜寻滴定池偏压，自动给定偏置电压，自动判别滴定的起始和终止，并对测量值进行数据处理和计算输出的功能。电解与测量分时进行，可消除其间的相互干扰，提高仪器的精度，本文阐述了仪器的测量原理，系统构成、仪器的微机化及特点等。     

基于单片机的自动测氢仪设计

阐述了电解滴定法测氢原理。依照电解滴定法设计了以8051单片机为核心的自动测氢仪。在自动电解和自动控制方面实现了自动化。通过选用高精度A/D和数据线性校正等措施提高了仪器测量精度。采用了看门狗技术、光电耦合器、多层线路板技术、多种布线技巧和软件抗干扰技术加强了系统的抗干扰能力。仪器完成了数字显示煤样中含氢值并打印煤中氢含量。     

基于LabVIEW/Flexmotion电解加工机床控制系统软件的设计

为了提高电解加工的精度,实现叶片电解机床的自动控制,结合新型叶片电解加工系统,设计了控制系统软件。软件设计基于虚拟仪器技术及其开发的环境LabVIEW和运动控制模块Flexmotion。采用模块化的设计结构,设计了软件开发的快速原型模型及一系列功能模块,实现了人机交互、自动控制、监测保护等功能。本文还设计了基于该系统软件的加工实例,试验证明软件运行稳定可靠。     

电解极化渗流传感器极化特性研究

针对岩土体渗流原位监测的需求,介绍了一种利用电解极化进行示踪测量的传感器基本原理和制作方法.提出了传感器极化性能测试方法,通过实验研究了传感器的极化特性及其对示踪源的影响,优化了电解电压和电解时间.结果表明:在极化达到稳态前,示踪源的强度随电解电压和电解时间的增加而增加,示踪源的位置随电解时间的增加而变化;在极化达到稳态后,示踪源的强度达到最大,且强度和位置均不随电解电压和电解时间的变化而变化,最佳的电解电压为9V,电解时间为4s.     

整体构件数控电解加工CAD/CAM平台关键技术

针对整体构件数控电解加工中存在的问题,利用数据库、有限元、数控等技术建立了以工程数据库为集成方式的整体构件数控电解加工CAD/CAM平台;解决了该平台中建模、加工过程数值模拟、数控运动仿真、数控加工编程、参数优化等关键技术;并将该平台用于整体叶轮、压气机静子等复杂零件的电解加工中.应用结果表明,采用文中的平台缩短了整体构件的试制周期,提高了电解加工试验的成功率.     

浅论Docker技术在微服务中的应用

微服务架构是目前许多大型云平台选择的应用系统架构。以Docker为代表的容器技术在微服务中得到了广泛的应用。Docker技术与微服务体系结构的结合极大地提高了信息系统的性能和效率。介绍和分析了微服务体系结构和Docker技术,讨论了Docker技术在微服务中的应用现状,总结了Docker技术的使用场景。     

基于ARM11的微库仑综合分析仪的研制

利用微库仑滴定技术的测量原理设计一款基于ARM和WinCE6.0实时操作系统的嵌入式新型微库仑分析仪。硬件设计包括电解电极采集信号电路、炉温控制电路、进样器电路、积分电路、背压检测电路、串口通信电路及质量流量控制电路;软件设计包括积分起始点和终点的判定、滴定曲线绘制、峰形面积计算、样品含量计算、参数设置以及利用校准法得到样品浓度。实验结果表明,该系统具有精度高、测量速度快、小型化、一体化、智能化等优点,能够测量固体、液体、气体中的硫、氯、氮等元素的含量,对今后同类系统的研发有一定的参考价值。     

锰电解实时信息系统的设计与实现

为了实现对锰电解生产过程的实时自动监控与管理,提出了基于网络和WEB技术的实时信息系统的设计方案,实践证明此方法实现锰电解的生产数据的实时传送和信息网络的无缝链接,形成生产数据采集、监控和管理一体化的实时信息系统。     

现代传感器中的微电容检测技术

本文介绍了微电容检测在原理、制作和应用上的优势。综述了微电容检测技术在微加速度传感器、微陀螺和微压力传感器上的应用,并详细阐述了微电容检测电路的基本原理。最后分析总结了微电容检测技术的发展方向。     

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。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

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。     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.     

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.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

Call for papers Special issue on Modeling and control technologies for civil,energy,and power systems

正The control of civil,energy,and power systems presents significant new challenges for modeling and control theory.The purpose of this special issue is to provide a forum for researchers and practical engineers to discuss the recent advances in modeling and control technology development for civil,energy,and power systems.Prospective authors are invited to submit their original contributions with the focus on theory or applications of modeling,control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate and promote academic exchange between Chinese and foreign scientists everywhere.