查询词典 Zhejiang University

Centre for Optical and Electromagnetic Research, Joint Laboratory of Optical Communications of Zhejiang University, State Key Laboratory for Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027

浙江大学现代光学仪器国家重点实验室，光及电磁波研究中心，光通信交叉中心，杭州 310027

Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, Joint Laboratory of Optical Communications of Zhejiang University, Zhejiang University, Hangzhou 310027

秦山；强则煊；何赛灵浙江大学现代光学仪器国家重点实验室，光及电磁波研究中心，杭州 310027

Currently he is the executive dean of Graduate College of Zhejiang University of Technology. In his studies on heterogeneous catalysis, he was awarded the 2nd Prize of State Invention Award, 1st Prize of Science and Technology Progress Award of Zhejiang Province and the Ministry of Chemical Industry and Engineering, the Science and Technology Award and Scientific Innovation Award of Chinese Youth, and Excellent Scientific Worker of Zhejiang Province.

现任学校党委委员、研究生院常务副院长、浙江省工业催化重中之重学科带头人，兼任《高校化学工程学报》编委、浙江省青年科学技术协会副会长和浙江省青年博士协会副会长兼秘书长，入选国家百千万人才一二层次和浙江省"151"人才第一层次，浙江省有突出贡献的中青年科技专家和省高校中青年学科带头人。

The company had been established July, 2002, the main development and the production green edible camellia-oil, the company existing staff 37 people, senior title 5 people, the primary title 6 people, the technical worker 11 people, have the fixed asset 5 million Yuan, the annual production purify the tea oil 1,800 tons, in many years tea-oil tree processing production process, the company and the Zhejiang Province Science Academy of Foresty, the Zhejiang University, the Zhejiang Province cooking oil examination center and so on has established the good cooperation relations, therefore the project construction has the force the technical strut.

公司成立于2002年7月，主要开展和生产绿色食用山茶油，公司现有员工37人，其中高级职称5人，初级职称6人，技术工人11人，拥有固定资产500万元，年产精制茶油1800余吨，在多年的油茶加工生产过程中，公司与浙江省林科院、浙江大学、浙江省粮油检测中心等建立了良好的合作关系，因此项目建设具有强力的技术支撑。

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。

Our company was built in 1984, the textile machinery and equipment in Zhejiang Province Industry Association Member plant, committed to the complete equipment industry system of the research and development, production GD122 and twist the main machine, in 1996 to adapt to market competition To meet our customers needs, the introduction of Korean technology development HRB96 Series composite twister, on the basis of this study successful DNJ single-twist, HRB96A-and multi-unit complex HRB99 twister, in 2001, Zhejiang University and Technical Cooperation , HRB201 development of several of the Line of Control, GD-ST series NC-cutter machines.

我公司建于一九八四年，是浙江省纺织机械器材工业协会会员厂，致力于制线行业成套设备的研究与开发，主要生产GD122并捻机，在一九九六年为适应市场竞争，满足用户需求，引进韩国技术开发HRB96型系列复合捻线机，在此基础上，研究成功DNJ型单捻机，HRB96A型及HRB99型多股复合捻线机，在2001年与浙江大学技术合作，开发HRB201型数控制线机，GD-ST系列数控成绞机等。

The company is under the jurisdiction of 843 state-run factories of Industry Corporation of weapons (the Qin chuan of the North of Xi'an now ), have cooperated with unit experts and technical staff such as Zhejiang University , Tsing-Hua University , Xi'an Communications University ,etc. for many years, in absorb , digest Company and AG reaction of Company , BBC of Germany , heat power at the technological foundation, develop , help integrated circuit control and digital control circuit brilliant floodgate in charge of the power of intermediate frequency, apply various smelting , being completely hot , quenching metal to , return bend and reaction heat field of brazing, make reaction heating technology of our company in in a leading position competence at home.

公司隶属于兵器工业总公司国营843厂（现为西安北方秦川有限公司），多年来同浙江大学、清华大学、西安交通大学等单位的专家及技术人员合作，在吸收消化德国BBC公司与AG公司的感应加热电源技术基础上，研制成全集成电路控制及数字控制线路晶闸管中频电源，应用于各种金属的熔炼、透热、淬火、弯管及感应加热钎焊领域，使我公司的感应加热技术在国内处于领先水平。

With powerful scientific research backing of University of Electronic Science and Technology of China,Southeast University,Zhejiang University and other universities and teachers,SCM,electronic,electrical,automation control,programmable control,SPLC programmable control,instrumentand other teaching experiment equipments jointly developed and produced by us have withstood severetest in the increasing keen competition,and have taken their place and good reputaion in the market.

企业以中国电子科大、东南大学、浙江大学等众多名校为科研后盾，联合研发生产的单片机、电子、电工、自动化控制、可编程控制、SPLC可编程控制等教学实验仪器设备，在日益激烈的市场竞争中经受了严峻考验，占有一席之地，取得了良好信誉。

Her paper in the BMJ last month, which was coauthored by Professor Wei Xing Zhu, of Zhejiang Normal University, and Professor Li Lu, of Zhejiang University, said that China has 119 male births for every 100 girls, compared with 107 to 100 in industrialised countries.

上个月，她与浙江师范大学的朱维兴教授和浙江大学的卢丽教授合作在《英国医学杂志》上发表了一篇论文，其中提到，中国新生儿的男女比例已经达到了119比100，而在工业化国家里这个数字是107比100。

2 College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, Zhejiang prov.

浙江省农业科学院植物保护研究所，浙江大学农业与生物技术学院，浙江大学农业与生物技术学院浙江杭州310021 ，浙江杭州310009 ，浙江杭州310009

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。