MIDlet与J2EE结合开发移动商务应用

介绍了J2ME软件架构、MIDP规范、MIDlet的基本概念和JBoss服务器的使用，分析说明了MIDlet与J2EE结合开发移动商务应用的基本原理和整体结构，并给出应用实例。     

Foobar2000技巧三则 玩转听歌之道

大家应该都会注意到Java软件安装文件夹的编号比如MIDlet20005。MIDlet20032，MIDlet20055等等，装过越多，编号会越来越大，即使你已经卸载掉!造成编号的不连续，中间很多编号都空缺!只装了10个不到的Java，编号却到了100都有可能。     

利用Java撰写手机应用程序(5) J2ME Wireless Toolkit篇

J2ME Wireless Toolkit是Sun官方版的MIDlet开发工具,虽然功能不算丰富,但仍算堪用。本文介绍了安装、设置这套工具,并使用它来开发MIDlet的方法。     

MIDP 2.0中MIDlet套件安装、升级和删除的设计与实现

简要介绍了Sun公司MIDP2．0规范中的应用程序管理系统，从实现的角度补充了规范中没有明确指定的细节。在详细讨论了MIDlet套件安装、升级和删除的流程之后，以此为基础设计了程序管理系统中MIDlet套件的安装系统的框架，包括安装、升级和删除功能。在实现上力求符合MIDP2．0规范要求、高效。     

MIDlet和Servlet之间的通信

MIDlet是创建和部署在移动设备上的程序,Servlet是创建和部署在Tomcat等web服务器上的程序。在移动应用程序开发中,可以借助于Http Connection建立移动设备和Web服务器之间的连接并进行通信。本文通过一个实例详细说明MIDlet和Servlet之间通信的完整过程。     

J2ME时钟动画屏保的设计与实现

给出了采用JDK和J2ME Wireless Toolkit编程设计手机动画屏幕保护程序的方法、步骤,包括PNG动画的制作、Timer类和TimerTask类设计定时器,以及对MIDlet套件进行打包和安装。     

移动终端信息提取方法的研究

本文在对移动信息体系及相关技术研究的基础上,通过对CLDC/MIDP、MIDlet、MIDP的UI模型、抽象Command命令、持续存储与RMS等的分析,讨论了移动终端信息提取的方法和实现途径.     

HART消息服务器在核电站控制系统的设计与实现

随着基于HART总线技术的智能仪表在核电站的广泛应用,传统的设备巡检方式因其效率低下已经无法满足现代电厂对高效生产管理的需要。如何实现对核电现场设备进行智能化管理已经成为核电控制领域迫切需要解决的技术难题。针对HART智能仪表应用场景,提出了HART消息服务器的系统设计方法。通过分析HART协议机理以及资产管理解决方案AMS智能设备管理系统工作原理,设计了基于HART协议的消息服务器方案,并在国产第三代核电数字化仪控系统中完成了开发,实现了核电控制系统与AMS智能设备管理系统的无缝集成。这使得通过AMS智能设备管理系统对核电现场HART智能仪表进行在线组态配置和故障诊断得以实现,极大地提高了核电控制系统的可靠性和数字化水平。     

利用Java撰写手机应用程序（5）——J2ME Wireless Toolklt篇

J2ME Wireless Toolkit是Sun官方版的MIDlet开发工具，虽然功能不算丰富，但仍算堪用。本文介绍了安装、设置这套工具，井使用它来开发MIDiet的方法。     

基于J2ME的移动互联网信息安全监控管理机制的研究

以移动互联网中信息安全为研究对象,从J2ME的体系结构出发,研究了移动互联网中的安全需求、信息安全监控管理机制、及J2ME对应用安全支持的分析。从移动互联网应用安全方面、MIDlet程序和Servlet服务器端构建一个信息安全监管试验系统。     

基于J2ME的移动电子商务系统实现

J2ME(面向资源受限设备)与J2EE(面向企业用户)技术的结合为移动电子商务提供了很好的解决方案。讨论了如何利用J2ME,Servlet和MIDlet等进行移动终端应用程序开发,并结合传统网站,实现了基于J2ME的移动商务模型。通过实验验证了建立移动商务网站的可行性。     

嵌入式Java虚拟机优化研究

为了改进手机中Java小程序的运行效率,基于KVM提出一种嵌入式Java虚拟机优化方案.在此方案中对解释器进行了改造,引入编译技术,并对KVM运行时内存的分配与回收方式作了改进.最后对比分析了在基准测试中KVM与优化方案的性能结果.     

MIDlet与Servlet通信的研究与设计

MIDlet和Servlet分别是J2ME和J2EE中两种重要的技术,分别适用于移动和服务器平台。该文通过设计相应类和接口,使两种不能直接交流的平台能够通过这两者的通信而得以实现。     

支持QoS的无线传感器网络容错拓扑控制算法

针对附加QoS需求的无线传感器网络,给出一种满足生命期和干扰服务要求的无线传感器网络无标度容错拓扑控制算法（scale-free fault-tolerance topology supporting quality of service,简称QoS-SFT）.通过分析无标度拓扑的度分布属性与其生命期和干扰性能的关联关系,量化出生命期和干扰联合优化的无标度拓扑度分布表达式,进而以无标度拓扑的度分布表达式为设计目标,采用偏好依附规则实现QoS-SFT算法设计,形成能够满足生命期和干扰联合优化要求的容错拓扑.理论分析和仿真结果表明,QoS-SFT算法不仅能够保证无标度拓扑的强容错性,还有效提升了无标度拓扑的生命期和干扰性能.     

Development of a mechanism for ontology-based product lifecycle knowledge integration

Compared with relying on the efforts of various enterprises collaborating on product lifecycle activities, such as coordination, communication and control, the ability to effectively share product information and knowledge is more important. Therefore, how to best integrate such heterogeneous product knowledge distributed among various cooperating enterprises has become an extremely important knowledge management subjects associated with collaborative product lifecycle.This study develops a novel mechanism for integrating ontology-based product lifecycle knowledge to effectively integrate the heterogeneous product knowledge distributed among different enterprises during a product’s lifecycle, thereby facilitating sharing of this product knowledge. This study: (i) designed an integration and sharing process for collaborative product lifecycle knowledge, (ii) developed techniques associated with integration of ontology-based product lifecycle knowledge, and (iii) implemented an integration and sharing mechanism for ontology-based product lifecycle knowledge. In developing techniques associated with integration of ontology-based product lifecycle knowledge, which involves establishing a product lifecycle ontology, designing local ontology schema, designing an integration algorithm for ontology-based product lifecycle knowledge, and designing a searching method for ontology-based product lifecycle knowledge.     

Deadlock and Blockage Control of Automated Manufacturing Systems with an Unreliable Resource

This work studies the deadlock and blockage control problem of an automated manufacturing system (AMS) with a single unreliable resource. It aims to develop a robust control policy to ensure that AMS can produce all parts in the absence of resource failures, and when the unreliable resource fails, the system can continuously produce all parts that do not require the failed resource. To this end, we divide the system into two regions, continuous and non‐continuous, based on whether all parts in them can be produced continuously or not. For the non‐continuous region, dominating region constraints are established to ensure that all parts in it do not block the production of parts in the continuous region, and an optimal deadlock avoidance policy based on a Petri net model is introduced to guarantee its deadlock‐free operation. For the continuous region, we configure a resource order policy to ensure the smooth productions of AMS. By integrating the dominating region constraints and deadlock avoidance policy with the configured resource order policy, we propose a novel robust control policy. It is proven to be of polynomial complexity and more permissive than the existing one with the same resource order policy. Also, it is tested to be more permissive than other existing policies.