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关键词： Java技术   中国移动   移动手机   欧洲市场   合作协议   Technologies公司   操作平台   手机设计  

关键词： 电力营销系统   JavaEE   面向服务架构   应用分层体系结构  

摘要： 该文在分析电力营销管理信息系统开放、标准、集成的实际需求的基础上,阐述了基于JavaEE技术和面向服务架构(SOA)的电力营销管理信息系统。提出了业务组件化、服务化、应用分层的设计思想,讨论了电力营销系统涉及的JavaEE技术、XML技术、Web应用框架、工作流服务、权限管理服务、图库一体化服务、电费计算服务、收费管理服务、报表管理服务等关键技术,并介绍了系统实际应用中的功能模块和具备的特点。

关键词： WebGIS   Internet   Intranet   BS结构   Java   多线程   动画  

摘要： 本文在对WebGIS的概念、发展以及使用Java开发环境开发3层结构的WebGIS在浏览器方面的优势进行介绍之后,重点描述了Java语言中多线程技术的特点,讨论了Java多线程技术在We-bGIS客户端数据调度、数据传输、数据展示方面的体会。

关键词： Java反射   LCMS   接口  

摘要： 在LCMS系统中基于Java反射技术实现了开放的、通用的数据库操作组件。采用UML语言进行分析、设计,给出了具体的实现方案。通过利用缓存技术有效地提高了该组件的运行效率。

关键词： chemical properties   exchangeable cations   green revolution   Java Island   seedfarm  

摘要： The effect of green revolution (GR) technology during the period 1970-2003 on changes in a number of chemical properties of sawah soils was studied in Java, Indonesia. The term sawah refers to a leveled and bounded rice fields with an inlet and an outlet for irrigation and drainage. Soil samples taken by Kawaguchi and Kyuma in 1970 and new samples from the same sites or close to the original sites were analyzed and compared. For the 40 sites examined, mean soil pH and exchangeable sodium (Na) decreased from 6.90 +/- 0.77 to 5.84 +/- 0.90 and from 3.28 +/- 2.76 to 1.67 +/- 2.06 kmol(c) ha(-1), respectively;while the exchangeable acidity and available phosphorus (P) significantly increased from 9.32 +/- 3.09 to 13.23 +/- 3.72 kmol(c) ha(-1) and from 136.62 +/- 154.72 to 255.75 +/- 292.41 kg P2O5 ha(-1), respectively. There were no significant differences in exchangeable calcium (Ca), magnesium (Mg) and potassium (K) contents and in effective cation exchange capacity (eCEC) during this period. Differences in land management practices may have affected the trends recorded in soil chemical properties in seedfarms where rice has been planted continuously using high doses of chemical fertilizers and in non-seedfarms where farmers use rotation patterns with low fertilizer application. The mean values of soil pH, exchangeable acidity, exchangeable Na and available P in the 0-20 cm soil layer in seedfarms changed by -1.25, 4.11 kmol(c) ha(-1), -1.42 kmol(c) ha(-1) and 194 kg P2O5 ha(-1), respectively;while in non-seedfarms these soil properties changed by -0.90, 3.26 kmol(c) ha(-1), -1.77 kmol(c) ha(-1) and 57 kg P2O5 ha(-1), respectively. The mean value of exchangeable K in seedfarms remained at the same level as that recorded in 1970 because of a sufficient supply of KCl as a potassium fertilizer during the study period. In contrast, in non-seedfarms where K fertilizer was applied infrequently, exchangeable K decreased by -0.30 kmol(c) ha(-1). In comparison with results fro

关键词： isolation   atomicity   concurrency   synchronization   Java   speculation  

摘要： This paper proposes two approaches to managing concurrency in Java using a guarded region abstraction. Both approaches use revocation of such regions-the ability to undo their effects automatically and transparently. These new techniques alleviate many of the constraints that inhibit construction of transparently scalable and robust concurrent applications. The first solution, revocable monitors, augments existing mutual exclusion monitors with the ability to dynamically resolve priority inversion and deadlock, by reverting program execution to a consistent state when such situations are detected, while preserving Java semantics. The second technique, transactional monitors, extends the functionality of revocable monitors by implementing guarded regions as lightweight transactions that can be executed concurrently (or in parallel on multiprocessor platforms). The presentation includes discussion of design and implementation issues for both schemes, as well as a detailed performance study to compare their behavior with the traditional, state-of-the-art implementation of Java monitors based on mutual exclusion. Copyright (c) 2006 John Wiley & Sons, Ltd.

关键词： green revolution   Java   sawah   seedfarms   total carbon   total nitrogen  

摘要： Many countries have reported that green revolution (GR) technology caused some adverse effects on agricultural lands, but there is no research on the effects of GR in Indonesia. To evaluate the effect of GR technology on sawah soil in Indonesia, a comparative study between seedfarms, where GR technology has been continuously applied, and non-seedfarms was conducted in Java as a pioneer place of GR technology in Indonesia and, in particular, on the carbon and nitrogen status in sawah soils. The term sawah refers to a leveled and bounded rice field with an inlet and outlet for irrigation and drainage. Soil samples collected by Kawaguchi and Kyuma in 1970 and new samples taken in 2003 from the same sites or sites close to the 1970 sampling sites were analyzed and compared. During the period 1970-2003 the land-use pattern of sawah in seedfarms and non-seedfarms did not change, but cultivation intensity increased. The results showed that total carbon (TC) and total nitrogen (TN) contents significantly increased from 31.90 to 40.42 Mg ha(-1) and from 3.04 to 3.97 Mg ha(-1), respectively, and TC and TN were mostly found accumulated in the surface soil layer. The difference in land management practices between seedfarms and non-seedfarms affected the change in TC and TN content in the 0-20 cm soil layer from 1970 to 2003. In seedfarms, where rice had been planted in a monoculture system, TC and TN contents in the 0-20 cm soil layer increased from 34.50 to 39.24 Mg ha(-1) and from 3.16 to 3.95 Mg ha(-1), respectively. In non-seedfarms, TC and TN increased more than in seedfarms from 29.77 to 41.37 Mg ha(-1) and from 2.94 to 3.98 Mg ha(-1), respectively. Within the 0-100 cm soil layer, TC and TN increased from 92.68 to 112.83 Mg ha(-1) and from 9.34 to 12.03 Mg ha(-1) and from 79.60 to 114.86 Mg ha(-1) and from 8.93 to 11.44 Mg ha(-1) for seedfarms and non-seedfarms, respectively. No significant difference was observed between the two main soil types, Inceptisols and Vertisol

关键词： 立交枢纽   交通仿真   三维仿真  

摘要： 立交交通仿真是智能交通微观仿真研究中重要的课题,但对于立交系统的仿真大多采用二维仿真的方法来实现,该文采用3D技术构建该系统,为立交交通仿真的研究提供一个崭新的研究方向。文中详细的阐述了如何将基于Java技术的Cu lt3D软件引入到立交交通3D仿真领域中。就立交系统的建立,控制模型的设计以及仿真数据的输出等所涉及的技术问题做出了系统、深入的分析,提出了全新的3D仿真解决方法,最后通过仿真实例的结果验证了此种仿真方法的可行性及优势。并对这一技术在本领域中的发展提出了展望。

关键词： Java技术   SOA   Sun公司   软件发展   平台软件   组合应用   CAPS   企业系统  

摘要： SOA一直是软件发展的热门话题,Sun公司在收购SeeBeyond之后,结合其Java技术,推出了CAPS(组合应用平台软件),并且承诺与原有JES(Java企业系统)融合,免费推出,试图进一步推动SOA的发展。

关键词： 数字电视产业   技术比较   中间件   HTML   Java   赢利模式   电视发展   广电总局   整体平移   技术标准  

摘要： 目前全国数字电视发展较为迅速，广电总局为数字电视的发展制定了相关的政策，大力推进了数字电视“整体平移”，“青岛模式”、“佛山模式”、“杭州模式”等等都给数字电视产业的发展带来了一些思路，但由于数字电视技术标准尚未出台，很多地方采用了溯览器的技术开展数据广播，由于溯览器开展增值业务存在先天不足，单向广播网络始终没有形成很好的赢利模式，数字电视用户的增长也较为缓慢。早期一些运营商也试用了OPen TV、Alticast、NDS的中间件，但由于各种原因未成气候。