查询词典 21st Century

Chinese civilization's deeply amassed, all-embracing and has capacious bosom, which led itself into an indelible vitality, even in the Globalization's getting more and more blazing's 21st Century, it still stands toweringly and have capaciouse market world wide.

中华文明积淀深厚，兼容并包，有着广阔的胸怀，因而也决定了其具有不可磨灭的生命力，即便是在全球化愈演愈烈的21世纪同样巍然屹立，在世界有着广阔的市场。

At the beginning of the 21st century, China is confronting three tasks: realize the strategy of economic development, maintain the sovereignty, independence, unification and the integrity of national territory, maintain the peace and tranquillization of the world and further mutual development.

中国在21世纪初期面临三大任务：实现经济发展战略，是中国自身的成长和发展需求；维护国家主权、独立、统一和领土完整，是中国的主权需求；维护世界和平与稳定，促进共同发展。

Severe acute respiratory syndrome is the first severe and readily transmissible new disease to emerge in the 21st century.

严重急性呼吸道症候群（Severe Acute Respiratory Syndrome， SARS）是二十一世纪以来第一种严重且快速传播的新兴传染病。

Intelligent Transportation System is the developmental direction for transportation realm in the 21st century.As the visual product of transportative information,electronic maps play an important part in ITS.

智能交通系统是交通领域 2 1世纪的发展方向，而电子地图作为交通信息的可视化产品，在智能交通系统中发挥着重要的作用。

The waning years of the 21st century saw the world plunged into strife and unrest on an unimagined scale.

21世纪的减弱年中，世界将陷入纷争和动乱的一个意想不到的规模。

The waning years of the 21st century saw the world plunged into strife and unrest on an unimagined scale.

最后对二十一世纪看到世界陷入争斗和动荡在这种规模。

With the support of a major research grant of Zhejiang Province (No. 001101027) and the Plan of Promoting Education of Excellence of Zhejiang University in the 21st Century, this dissertation is devoted to address the above problems and fabricate an L-band EDFA with low cost, high performance and technological innovation.First the mechanism of an erbium doped fiber amplifier is introduced. Various theoretical models based on classical rate propagation equations are summarized and compared for their applications. We use a modified numerical model based on the Giles model, which agrees with the experimental results well. This serves as the theoretical base for the whole thesis and will be used to optimize the characteristics of EDFAs. A novel method based on a map of noise figure and gain is proposed to analyze efficiently the dependence of the noise figure and gain for EDFAs on the EDF length and the pump power. The characteristics of various EDFAs are studied and compared.Secondly, some important parameters are introduced to describe the characteristics of EDFAs. The methods and the experimental setups for measuring the gain and noise figure of an EDFA are emphasized. We introduce how to measure the characteristics of each component of an EDFA, especially the gain and absorption coefficient of an erbium doped fiber.Thirdly, four types of simple and novel L-band EDFA structures with low noise, high gain and low gain ripple are proposed to satisfy the requirement of a DWDM system. They can be classified into two categories. In the first category, a single ASE pumping is served asa secondary pump. This category includes the following three types. Type: a new construction using a fiber Bragg grating in an unpumped EDF section at the input side. Type: a new structure of L-Band EDFA with two-stage pumps, which utilizes the forward ASE as a second pump.

本论文本着科技创新、服务于生产实践的精神，以设计价格低廉，性能优越、结构合理简单的L-band EDFA为目标，依托浙江省科技厅重大科学基金资助项目(001101027)和浙江大学振兴教育计划资助的全光网络的搭建—《光通信技术》课程实验建设项目，展开了如下工作：首先，介绍了掺铒光纤放大器的工作原理，归纳总结了基于速率方程基础的EDFA的各种理论模型，分析比较了各个模型的特点和适用场合，最终选择完善的Giles理论模型作为本论文分析设计EDFA的理论基础；针对实际实验条件提出了修正的EDFA模型的数值计算方法；创新地提出了增益—噪声系数全局分析法，直观有效地分析了EDFA的增益和噪声系数与掺铒光纤长度和泵浦功率的依赖关系，并对各种EDFA的性能作了全面的比较；第二，介绍了掺铒光纤放大器特性参数的定义与测量方法，重点介绍了噪声系数和增益系数的测量方法及实验装置；介绍了组成掺铒光纤放大器各组件的特性测量方法，重点介绍了测量掺铒光纤参数的方法和实验装置；第三，针对WDM系统对L-band EDFA谱平坦、低噪声、高增益的要求，我们创新地提出了四种不同的L-band EDFA结构，按设计思路可以分为两大类：一类是基于单抽运二级泵浦法，这一类包括在未泵浦掺铒光纤的输入端插入一根布拉格光纤光栅的两段L-band的EDFA的新结构；基于前向ASE光作为二级泵浦源推动下一级EDF工作的泵浦分配、两段级联L-band的EDFA的新结构；基于单根光纤光栅、泵浦分配、两段级联的EDFA；另一类则是基于同时应用前后向C-band ASE作二级泵浦源的双抽运法，如基于前后向ASE光作为二级泵浦源的三段级联L-band的EDFA的新结构。

Part three is devoted to the interior stylist and guru's as defining phenomenon for the ultra-wealthy in the 21st century, says Joseph Cala', Chairman and founder

海底度假村的创办人兼主席 Joseph Cala 说：&第三部分是寻找在21世纪被评为极具想象力的设计师作为我们的内部设计师。&

The works of Natee Utarit are increasingly sought after, their technical virtuosity seducing a younger generation of art-buyers brought up in the slick and brand-hawking shopping malls of 21st century Asia.

纳堤。尤塔瑞的作品越来越受欢迎，其中精湛的技巧，就像21世纪中，在亚洲许多名牌林立的购物中心里诱惑着艺术爱好者拥有。

21St century is the period of developing advanced science, changing culture and ideasfrom time to time and continuous strength of international communication. Competition isbecoming sharper and sharper with it . Society in the future would need people withhigher quality. The people should not only have advanced knowledge , but also havenoble-minded accomplishment, lofty ideals, large-minded, correct world outlook, outlook onlife and value outlook, social sense of responsibility, perfect character, at the same time , theyshould have the spirit of cooperation individuality and special creativeness.

世纪是一个科技高速发展，文化思想日新月异，国际间的交流日益加强的时期，随之而来的竞争也越来越激烈，未来社会对人才素质的要求也就越来越高，既要求人才具有高深的知识水平，同时要求人才自身具有高尚的修养、远大的理想、宽阔的胸襟，正确的世界观、人生观、价值观，社会责任感、健全人格，更要有合作精神，个性化精神，独特的创造精神。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新