EJB3．0简化EJB开发的研究与开发

EJB作为J2EE(Java EE)开发中的核心技术,它能很方便地为用户提供事务和安全等系统级服务,但EJB的开发从EJB1．0到 EJB2．1变得越来越复杂。新的EJB 3．0规范中通过大量采用Annotations、IoC,修改实体Bean模型为真正的对象-关系映射模型,从而大大地简化了EJB的开发。     

EJB组件技术及其在WebGIS应用优势分析

简要介绍了EJB的基本概念、EJB的角色以及EJB的开发机制,并对利用EJB组件技术开发基于Internet的WebGIS的技术优势进行了分析。     

RMI-ⅡOP在EJB容器通信中的应用

介绍了J2EE体系结构中EJB容器的特点和提供的服务,针对EJB的通信,利用RMI-Ⅱ0P协议,实现了不同容器间EJB的通信.     

RMI-IIOP在EJB容器通信中的应用

介绍了J2EE体系结构中EJB容器的特点和提供的服务，针对EJB的通信，利用RMI-IIOP协议，实现了不同容器间EJB的通信．     

基于EJB3.0的分布式信息系统设计与实现

分析了JavaEE服务器端组件模型EJB3.0的体系结构,并介绍了它的新特性,讨论了开发EJB3.0组件的过程,并通过对现有系统的移植阐述了EJB3.0组件在分布式信息系统中的应用。     

基于EJB组件的教学辅导系统设计与实现

EJB是分布式Java部件的服务器框架,它使多层、面向服务器部件开发成为现实。本文总结了EJB组件技术实现多层体系结构方法,并给出EJB实现的教学辅导系统实例。     

基于Facade的EJB远程调用技术

EJB技术是J2EE中一个核心的模块,它具有高复用性、易于维护,和较强的移植性等特性.Facade模式是一种很流行的EJB设计模式,介绍了其具体特性及在实际项目开发中的应用.     

基于J2EE的EJB组件技术在远程教育平台中的应用研究

EJB(Enterprise Java Bean)是一种创建在服务端的可扩展、事务处理的、多用户安全的企业级应用,它为开发分布式的N-Tier中间件提供了统一的组件结构框架．在对EJB多层体系结构分析的基础上,构建了一个基于EJB的远程教育平台,并从面向对象的角度对该平台的设计及实现过程进行了分析．     

基于EJB组件的教学辅导系统设计与实现

EJB是分布式Java部件的服务器框架，它使多层、面向服务器部件开发成为现实。本文总结了EJB组件技术实现多层体系结构方法，并给出EJB实现的教学辅导系统实例。     

基于EJB体系结构的开发模型研究

与传统的体系模型相比,EJB体系结构有明显的优势,尤其适合于构造功能复杂的企业级Web应用系统。通过对基于EJB的信息系统开发模型的研究,可以帮助我们更好地构造具有多层体系结构的分布式系统。论述了EJB体系结构模型。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.