基于脚本的客户端软件结构化存储技术研究

为了更方便地开发webwidget和webapp等应用程序,文中提出一种基于XML（HTML）描述并辅之以JavaScript之类的脚本,构造出可以离线应用的程序。这是WPF、webOS等技术的基础思想,考虑到安全性,这类软件不可能允许应用直接操作本地文件系统,都是通过一层抽象,以满足一般性的应用开发为目标。文中就是通过分析HTML5标准,从而对基于描述的客户端结构化存储提供统一的解决方案。HTML5关于数据库的接口标准目前还只是在部分浏览器中得以实现,但是随着技术发展,会有更多的浏览器加入这种标准,在将来基于浏览器的web应用开发都可以采取HTML5标准的数据库接口。     

基于HTML 5的校园网应用系统的探讨

作为下一代Web应用标准的HTML 5,更加注重Web应用和表现及在移动Web平台良好的用户体验。HTML 5的浏览器/服务器的开发模式、对多媒体标签功能的支持以及在移动应用跨平台性等优势,对基于传统技术的校园网应用系统来说,在开发和使用中都有了很大改进。通过对HTML 5新特性和在校园应用系统优势的分析,旨在为校园网应用系统的开发提供新思路。     

在教学中融入HTML5标准以提高学生的就业竞争力

随着智能手机用户的增加,移动互联网的用户与日俱增。iphone手机、Android系统手机中的浏览器也支持HTML5标准。HTML5是未来网页设计的新标准,目前大多数浏览器开始支持HTML5,基于HTML5的新功能开发移动互联网中的应用程序必将给移动互联网带来了更大的发展空间和应用空间。学生在学校期间能够学习和使用HTML5标准可以开辟更大就业范围,提高学生的就业竞争力。     

谁能抢占移动web应用制高点?——《应用商店将死 浏览器永生》续

不管你是否喜欢HTML5,它都是代表着未来的发展趋势。在本刊上两期《应用商店将死浏览器永生》系列报道中,针对HTML5技术所带来的Web应用开发机遇做了深入分析和探讨,并判断随着标准逐渐走向成熟,Web应用将取代目前的应用商店模式成为发展主流。那么,在众多的手机浏览器里,谁能抢占移动web应用制高点,成为最耀眼的平台呢?     

数据库访问方法

当今的Web数据库开发工具提供了通过一个浏览器对一个公司数据库进行访问的多种策略，Web化的快速应用程序开发RAD方案可以通过利用插件或ActiveX控件在您的浏览器中实现。结合ActiveX或Java技术的HTML语言是数据库设计的最典型的方式，而纯HTML语言所提供的客户方的功能范围有限，一些工具为您的应用程序开发提供了诸多选项。     

HTML5的新特性及其在基于Web的教学平台开发中的应用前景

HTML是Web编程中的基础语言,绝大多数远程教学平台都是基于Web的,在移动互联网时代,由于Web部署上的优势,越来越多的应用系统也将会转移到Web上来。然而,目前所广泛使用的HTML4.01推出已有十多年时间,它本身的缺陷表现得愈加明显,它逐渐成为了Web发展的制约因素。尽管HTML5还处于不断完善阶段,但在IE、Firefox、Opera等新版PC浏览器已支持绝大部分HTML 5功能,移动设备的浏览器对HTML5支持情况更好。HTML5新开放的API、新增的标记及离线支持等特性能显著提升Web应用的开发效率。该文介绍了HTML 5中新增标记的富媒体特性,探讨了表单及离线支持等特性并简要分析了HTML5在教学平台开发中的应用前景。     

HTML5的新特性及其在基于Web的教学平台开发中的应用前景

HTML是Web编程中的基础语言,绝大多数远程教学平台都是基于Web的,在移动互联网时代,由于Web部署上的优势,越来越多的应用系统也将会转移到Web上来。然而,目前所广泛使用的HTML4.01推出已有十多年时间,它本身的缺陷表现得愈加明显,它逐渐成为了Web发展的制约因素。尽管HTML5还处于不断完善阶段,但在IE、Firefox、Opera等新版PC浏览器已支持绝大部分HTML 5功能,移动设备的浏览器对HTML5支持情况更好。HTML5新开放的API、新增的标记及离线支持等特性能显著提升Web应用的开发效率。该文介绍了HTML 5中新增标记的富媒体特性,探讨了表单及离线支持等特性并简要分析了HTML5在教学平台开发中的应用前景。     

基于COM的通用数据库访问组件的设计与实现

给出了一个基于COM的通用数据库访问组件的设计和实现方法，提出了一种动态生成HTML网页的算法。组件通过接收浏览器提交的参数进行数据库操作，把结果以HTML页面的方式反馈给浏览器，从而实现浏览器和数据库之间的交互式操作。     

HTML5——下一代Web开发标准研究

HTML(HyperText Mark-up Language)是目前网络上应用最为广泛的语言,也是构成网页文档的主要语言.旧有的HTML版本是10年之前制定的,在表达和应用上已经很难满足开发人员和使用者的需求.为了适应这快速发展的Web技术以及不断提出的Web应用需求,HTML5应运而生.首先简要描述了HTML5的发展历程,然后重点介绍HTML5的特点和应用,并与现有的Web技术如RIA(Rich Internet Applications)、cookies等在网络通信、数据存储、地理定位、音视频播放、网页绘图方面进行比较,分析HTML5在这些领域的优势,从而得出结论.HTML5较之前的版本加入的新功能,能够使开发和使用网页更加便捷,并与浏览器很好地结合,降低了浏览器对资源的占有率以及对插件的依赖.最后探讨了HT-ML5中存在的一些问题和今后主要发展的方向.     

基于HTML5的电力信息发布管控系统

超文本标记语言(Hyper Text Mark-up Language,HTML),是Tim Berners Lee和Daniel W.Connolly在1990年创立的一种标记式语言,这种标记式语言构成了当前互联网上绝大部分的网页文档,是当前互联网上应用最为广泛的标记式语言。从初始的HTML语言的提出到现在已经有二十多年的时间,虽然在这期间经历了很多次改进,但针对当前多媒体信息爆炸增长的情况,旧有的HTML语言对开发人员和使用者的需求,都已经很难满足了。幸运的是,HTML5的出现,可以使用户更好的应对飞速发展的Web技术和不断出现的Web应用需求。HTML5是基于HTML4.01,XHTML1.0和DOM级别XHTML的下一代推荐标准,其目标是减少对专有富互联网应用(Rich Internet Application,RIA)技术的依赖,如Flex,Silverlight,JavaFX等。HTML5中出现的新特性,可以使用户在构建在线视频编辑,音频可视化,动作检测等方面使用全新的方案,再加上与JavaScript技术综合使用,可以为互联网多媒体技术带来更大的发展潜力,而且这一技术革新能够更好的支撑多媒体协同编辑技术。所以,应用HTML5技术,构建多媒体电力信息发布系统,能够使开发人员更加快捷的进行开发,使用户更便捷的使用网页,同时降低了浏览器对系统资源的消耗,以及对各种插件的依赖,提高了兼容性。     

A framework for efficient regression tests on database applications

Regression testing is an important software maintenance activity to ensure the integrity of a software after modification. However, most methods and tools developed for software testing today do not work well for database applications; these tools only work well if applications are stateless or tests can be designed in such a way that they do not alter the state. To execute tests for database applications efficiently, the challenge is to control the state of the database during testing and to order the test runs such that expensive database reset operations that bring the database into the right state need to be executed as seldom as possible. This work devises a regression testing framework for database applications so that test runs can be executed in parallel. The goal is to achieve linear speed-up and/or exploit the available resources as well as possible. This problem is challenging because parallel testing needs to consider both load balancing and controlling the state of the database. Experimental results show that test run execution can achieve linear speed-up by using the proposed framework.     

基于距离的不确定离群点检测

在诸如网络入侵、无线传感器网络异常事件等检测应用中,离群点检测是一项具有很高应用价值的技术.这项技术在确定性数据中已经得到了深入的研究,但在新兴的不确定数据领域却是一项新的研究课题.在无线传感器网络、数据集成和数据挖掘等技术中使用不确定数据模型更能真实反映现实世界,进一步提高这些技术的实际可行性.针对不确定数据,提出新的离群点定义.提出基于距离的不确定数据离群点检测的高效过滤方法,包括基础过滤方法b-RFA和改进方法o-RFA,最后提出高效概率计算方法DPA.b-RFA方法利用非离群点的过滤性质,减少检测次数.o-RFA方法通过挖掘数据分布信息对b-RFA方法作出改进,进一步提高过滤效率.DPA方法找到概率求解中的递推规律,极大提高了单点检测效率.实验结果显示:提出的方法可以有效地减少候选集,降低搜索空间,改善在不确定数据上的查询性能.     

Flexible robust programming in distributed object systems

Distributed applications that access persistent objects must maintain object state consistency even when failures are encountered during the manipulation of such objects. The basic transaction model, which has been implemented by several systems to ensure consistent executions of distributed applications, is not flexible enough to meet the requirements of many complex distributed applications. This has also been recognized for advanced database applications and, as a result, extended transaction models have been developed. We argue that distributed applications that manipulate long-lived data can benefit from such transaction models. We take an approach which views the various transaction models as policies for building robust applications. Thus, we advocate that the system implement several transaction models. A robust application can be programmed in such a system using a combination of several transaction models to meet its consistency requirements. We use applications from the domain of computer-supported cooperative work to motivate such an approach. We also develop a set of system-level mechanisms which can be used to implement multiple transaction models in a uniform manner. These mechanisms are used to implement nested, split, and cooperating transaction models. A prototype system that has been implemented is described to demonstrate the feasibility of this approach.     

Digital microfluidics: is a true lab-on-a-chip possible?

The suitability of electrowetting-on-dielectric (EWD) microfluidics for true lab-on-a-chip applications is discussed. The wide diversity in biomedical applications can be parsed into manageable components and assembled into architecture that requires the advantages of being programmable, reconfigurable, and reusable. This capability opens the possibility of handling all of the protocols that a given laboratory application or a class of applications would require. And, it provides a path toward realizing the true lab-on-a-chip. However, this capability can only be realized with a complete set of elemental fluidic components that support all of the required fluidic operations. Architectural choices are described along with the realization of various biomedical fluidic functions implemented in on-chip electrowetting operations. The current status of this EWD toolkit is discussed. However, the question remains: which applications can be performed on a digital microfluidic platform? And, are there other advantages offered by electrowetting technology, such as the programming of different fluidic functions on a common platform (reconfigurability)? To understand the opportunities and limitations of EWD microfluidics, this paper looks at the development of lab-on-chip applications in a hierarchical approach. Diverse applications in biotechnology, for example, will serve as the basis for the requirements for electrowetting devices. These applications drive a set of biomedical fluidic functions required to perform an application, such as cell lysing, molecular separation, or analysis. In turn, each fluidic function encompasses a set of elemental operations, such as transport, mixing, or dispensing. These elemental operations are performed on an elemental set of components, such as electrode arrays, separation columns, or reservoirs. Examples of the incorporation of these principles in complex biomedical applications are described.     

A fuzzy expert database system

Fuzzy concepts always exist in much of human reasoning as well as decision making. This paper presents a fuzzy expert database system which is an integration of a fuzzy expert system building tool called SYSTEM Z-II and a database management system called Rdb/VMS. This system is able to extract fuzzy data and terms stored in a database and used in the fuzzy reasoning in an expert system. It can also retrieve information by fuzzy database-queries which are generated by the expert system automatically. Many expert systems in different domain areas such as decision making can be constructed. Sample applications are described to demonstrate the flexibility and power of this system. The fuzzy query language defined and used in the system can also be used independently as a fuzzy enquiry tool in database applications.     

Development of a novel type of microrobot for biomedical application

This paper proposes a new type of microrobot that can move along a narrow area such as blood vessels which has great potential for application in microsurgery. Also, the development of a wireless microrobot that can be manipulated inside a pipe by adjusting an external magnetic field has been discussed. The model microrobot utilizes an electromagnetic actuator as the servo actuator to realize movement in biomedical applications. The structure, motion mechanism, and evaluation characteristic of motion of the microrobot have been discussed, and the directional control can be realized via the frequency of the input current. The moving experiments have been carried out in branching points in the horizontal direction, and the moving speed of the robot has been measured in vertical direction by changing frequency. Based on the results, the microrobot has a rapid response, and it can clear out dirt which is adhering to the inner wall of pipe. This microrobot will play an important role in both industrial and medical applications such as microsurgery.     

基于MAS的多AGV自动化立体仓库系统设计

结合多台AGV的烟叶配方自动化立体仓库系统的设计,在Multi—Agent系统（MAS）和智能AGV的相关研究的基础上,探讨了在自动化立体仓库系统中应用AGV作为执行智能体实现多智能体协作的自动化仓库系统。采用MAS方法建立了自动化仓库系统模型,并详述了规划Agent和AGV—Agent的实现。该系统的设计提高了企业生产效率,对相关实际应用具有重要意义。     

Late join algorithms for distributed interactive applications

Distributed interactive applications such as shared whiteboards and multiplayer games often support dynamic groups where users may join and leave at any time. A participant joining an ongoing session has missed the data that have previously been exchanged by the other session members. It is therefore necessary to initialize the application instance of the latecomer with the current state. In this paper, we propose a late join algorithm for distributed interactive applications that provides such an initialization of applications. The algorithm is scalable and robust and can be easily adapted to the needs of different applications by means of late join policies. The behavior of the late join algorithm and the impact of design alternatives are investigated in detail by means of an extensive simulation study. This study also shows that an improper handling of the late join problem can cause very high application and network load.     

基于SOAP的多对多通信模型研究

面对基于Internet的多数据流应用的需要,研究了一个基于SOAP的多对多通信模型。在JAXM点对点同步调用基础上建立异步调用。同时提出了全双工数据通信、流量控制、缓冲区调整、内/外缓存处理等优化策略,解决基于SOAP应用的性能瓶颈以及数据密集型并行通信峰值所造成的效率低下问题。该模型适合于基于Internet的多数据流应用。     

A Schematic Entry Drawing Capability in a Linearised Hypermedia System

This paper describes a linearised hypermedia system, called the Book Emulator, that generally supports the capture of diagrammatic specifications such as SSADM and electronic circuit diagrams, and the capture of mathematical notations such as Z. Since the Book Emulator can be closely coupled to applications, it can be used as the user-interface to that application. Doing so automatically provides a conferencing mechanism on behalf of applications and a mechanism for recording the engineering analyses performed by the application. It is argued that this is the next and higher step in the trend to separate the user-interface from the application. The schematic entry mechanism has been designed to minimise the user's physical and mental effort so that the user may concentrate on drawing strategy. This is achieved by minimising the number of selections (steps) required to reach an atomic goal, and by refraining from hiding functionality in menus. The paper concludes with an indication of how the generalised schematic capture mechanism might be exploited in systems that allow end- users to organise and specify their information requirements.