基于DOM4J的XML文档解析技术研究与应用

首先介绍了XML文档解析的方式,并对两种解析方式进行了深入探究。在此基础上,引入了DOM4J技术。DOM4J是集成了DOM和SAX的XML文件解析器,提供了大量接口用于对XML文件的处理,具有性能优异、功能强大的特点。介绍了使用DOM4J解析XML文档的应用研究,其以XML作为数据库存储学生信息,以实现简单的数据库管理系统。     

FT-ICR MS解析水中DOM化学多样性及分子转化特性

针对溶解性有机物（DOM）组成极具复杂性、难以从分子水平研究其化学多样性的问题,该文基于FT-ICR MS超高分辨质谱技术建立了水体DOM的分子组成和化学多样性的表征方法：通过可视化分析发现水中DOM是以CHO元素组成的木质素/富羧酸脂环分子为主体;揭示了氯消毒过程中DOM的分子转化规律,证实DOM中CHO分子的主要转化途径为木质素/富羧酸脂环分子氧化并裂解生成高含氧化合物;识别了氯消毒后生成的氯代消毒副产物分子,其中最主要的副产物类型为氯代多酚类化合物。实验结果表明了FT-ICR MS技术在解析DOM化学多样性及分子转化特性的优势,为多种复杂环境下DOM分子层面转化研究提供了强有力的支撑。     

DOM规范在.NET平台上的应用原理剖析

DOM(Document Object Model文档对象模型)是W3C制定并推荐遵循的一种技术规范。XML的DOM定义了一个独立于平台和语言的标准接口,允许应用程序通过它动态地存取XML文档。论述了DOM规范的体系结构、发展历程和应用现状。在Microsoft的．NET 平台上通过封装的DOM类库解析和存取XML文档,并在ASP．NET中完成了对XML文档数据提取的应用实例。     

基于USB的ADS1258传感器信号采集系统

介绍了ADS1258模数转换器工作原理,设计了一种由ADS1258和CY7C68013芯片构成的高精度信号采集系统,并介绍了其软件设计和数据格式。该系统主要应用于多通道传感器信号采集平台。经测试,ADS1258在自动扫描模式下采集速率达到3kSPS,能很好地应用于低速高精度数据采集场合。     

基于扩展DOM树的XML SCHEMA文档转换为数据库模式算法

通过分析XML文档转换成数据库文件存在的问题,提出基于扩展DOM树的XML Schema文档转换为数据库模式的算法。提出了扩展DOM树的概念。描述了由XML Schema文档生成扩展DOM树算法。说明了路径键的概念及其作用。实现了将扩展DOM树转换成数据库模式的算法。实现过程使用了反向扫描优化和特殊元素处理规则。     

基于DOM和显示属性的网页信息除噪技术研究

提出了一种基于文档对象模型(DOM)和网页显示属性的信息除噪方法.通过对网页内容进行结构和特点分析,把一个网页信息内容划分为信息块和噪声块两个部分,利用解析器把网页转化成DOM模型并对网页信息噪声进行判断,根据网页的显示属性对DOM模型进行简化,最终实现对DOM模型噪声信息的有效去除.     

基于DOM的XML解析在JAVA中的技术实现及应用

用Java解析XML文档,可以使用DOM解析器,DOM是用与平台和语言无关的方式表示XML文档的官方W3C标准。DOM是以层次结构组织的节点或信息片断的集合。这个层次结构允许开发人员在树中寻找特定信息。分析该结构通常需要加载整个文档和构造层次结构。     

城镇污水处理过程中溶解性有机物的含量与光学性质的变化特征

目的:探究城镇污水处理过程中,污水溶解性有机物(DOM)的含量和光学性质的变化特征.方法:利用总有机碳(T OC)、紫外-可见光光谱(U V-Vis)和三维荧光光谱(3DEEM)分析技术对滁州市某城镇污水处理厂处理前后DOM的含量、性质和荧光物质组成进行研究.结果:T OC结果显示,进水DOM中T OC含量为5.9～19.4 mol/L,α254的变化范围是55.1～97.4 m-1.出水DOM的T OC和α254均较为稳定,处理效果可分别达到35.0％ ～82.0％(以T OC计)和34.4％ ～64.3％(以α254计).UV-Vis分析结果显示,进水DOM的SUVA 254值是(3.5±1.1)m2/gC,而出水DOM的SUVA 254为(4.4±0.4)m2/gC,表明污水处理过程中保留或生成了大分子DOM.EEM结果显示,进水DOM富含低激发波长色氨酸[λEx/λEm=(225～230)nm/(350～360)nm]和高激发波长色氨酸[λEx/λEm=(270～280)nm/(350～360)nm]荧光物质.除这2类荧光物质外,出水DOM还含有明显的紫外光区类腐殖酸[λEx/λEm=(230～240)nm/(430～440)nm]和可见光区类富里酸[λEx/λEm=(305～310)nm/(400～410)nm].分析进水和出水DOM的荧光指数(FI)、自生源指数(BIX)和新鲜度指数(β:α)结果显示进水和出水DOM均呈现出显著的生物源排放特征,且进水DOM表现出更高的自生源贡献.结论:污水处理工艺可降解大量的DOM,其中以类蛋白物质降解为主,但是对大分子类腐殖质的降解效果不明显甚至可生成新的大分子类腐殖质物质.该研究结果为优化污水处理工艺,完善水质评价指标和进一步理解DOM的污染源等提供了重要的科学依据.     

ADS-B数据链路技术分析及其在空管领域中的运用

ADS—B系统是一个集通信与监视于一体的信息系统。ADS—B数据链路技术是其核心点。ADS—B实现冲突避免、冲突解决、空中交通管理以及机舱综合信息显示的有机结合,为新航行系统增强和扩展了非常丰富的功能。     

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?     

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…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.