JSR135的设计与实现

JSR135是J2ME平台上重要的optionalpackage,提供了多媒体的播放功能。论文简单介绍了JSR135的规范,提出了JSR135的一种跨平台设计方案,着重介绍了Windows系列操作系统上的设计和实现。     

Progress in the production and application of n-butanol as a biofuel

Butanol is a very competitive renewable biofuel for use in internal combustion engines given its many advantages. In this review, the properties of butanol are compared with the conventional gasoline, diesel fuel, and some widely used biofuels, i.e. methanol, ethanol, biodiesel. The comparison of fuel properties indicates that n-butanol has the potential to overcome the drawbacks brought by low-carbon alcohols or biodiesel. Then, the development of butanol production is reviewed and various methods for increasing fermentative butanol production are introduced in detailed, i.e. metabolic engineering of the Clostridia, advanced fermentation technique. The most costive part of the fermentation is the substrate, so methods involved in renewed substrates are also mentioned. Next, the applications of butanol as a biofuel are summarized from three aspects: (1) fundamental combustion experiments in some well-defined burning reactors; (2) a substitute for gasoline in spark ignition engine; (3) a substitute for diesel fuel in compression ignition engine. These studies demonstrate that butanol, as a potential second generation biofuel, is a better alternative for the gasoline or diesel fuel, from the viewpoints of combustion characteristics, engine performance, and exhaust emissions. However, butanol has not been intensively studied when compared to ethanol or biodiesel, for which considerable numbers of reports are available. Finally, some challenges and future research directions are outlined in the last section of this review.     

Experimental kinetic study of the oxidation of p-xylene in a JSR and comprehensive detailed chemical kinetic modeling

The oxidation of para-xylene was studied in a jet-stirred reactor at atmospheric pressure under dilute conditions. New experimental results were obtained over the high-temperature range 900-1300 K, and variable equivalence ratios (0.5?Φ?1.5). They consisted of concentration profiles of the reactants, stable intermediates, and final products, measured by sonic probe sampling followed by on-line GC-MS and off-line GC-TCD-FID and GC-MS analyses. The oxidation of para-xylene under these conditions was modeled using a detailed chemical kinetic reaction mechanism (160 species and 1175 reactions, most of them reversible) deriving from a previous scheme proposed for the ignition, oxidation, and combustion of simple aromatics (benzene, toluene, styrene, n-propylbenzene). The proposed kinetic scheme was also successfully tested against the ignition delays of p-xylene-oxygen-argon mixtures, and the combustion of p-xylene in a low-pressure methane-oxygen-nitrogen flame doped with p-xylene, confirming its validity. Sensitivity analyses and reaction path analyses, based on rates of reaction, were used to interpret the results.     

地域通信网单链路干扰研究

地域通信网是现代军事通信中一种重要手段,链路是通信网络的重要组成部分。不同通信体制下对链路干扰的效果是不同的,误码率是衡量通信质量的重要参数,干信比是对干扰效能的衡量指标,而链路阻塞率则是对网络服务质量进行描述的具体参数,研究不同通信体制下3种变量之间的关系对地域通信网干扰研究具有十分重要的意义。文章正是在地域通信网单链路的基础上,从链路模型和通信干扰效果两个方面出发,研究了链路阻塞率、干信比和误码率之间的关系,并进行了计算机仿真。     

手机遥控计算机（MPCPC）系统的开发与研究

研究了基于蓝牙通俗技术的手机遥控计算机（Mobile Phone Control Personal Computer）系统软件编程技术。软件分为计算机端和手机端两部分,计算机端用JavaSE作为开发语言,手机端用J2me作为开发语言,通过JSR82标准里的核心蓝牙包javax.bluetooth实现无线通信功能。该软件系统可改变用户控制计算机的方式,使计算机控制更加多样化,用户使用更方便、舒适。     

JavaMIDP平台下蓝牙通信软件设计

蓝牙是一种低成本、低能耗、小范围的无线通信技术,主要用途是为移动设备（手机、PDA和其他便携设备）提供相互通信的能力。蓝牙并非是一项新的技术,但利用Java在MIDP平台下开发蓝牙应用程序却是一项新的技术。为了在JavaMIDP平台下开发支持蓝牙技术的软件,JCP定义了JSR82标准一Java蓝牙无线技术APIs（JABWT）。本文阐述了如何使用JABWT设计蓝牙应用程序,并对串口仿真协议（I强cOMM）进行了详细的分析和深入的研究,然后应用RFCOMM协议在JavaMIDP平台下开发了蓝牙通信应用程序。