查询词典 support structure

The powerful body structure at all the machines manufactured in our plant, unproblematic and quick operation, at the latest technological equipment workmanship, long-life and technical support together with the customers satisfaction is accepted as unchangeable principle.

强大的车身结构在所有的机器制造工厂，不成，快速行动，在最新的技术设备，工艺，长寿命和技术支持与客户的满意就是接受为不可改变的原则。

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。

Cooper storage is utilized and developed to solve semantic problems associated with Discontinuous Constituency,for example the computation of the structure with "de",the computation of unreducible generalized quantifiers.In the end of this chapter,the author support a dynamic tactic to resolve ambiguity in the scope of generalized quantifiers.

该章利用和发展了Cooper储存的方法，尝试解决大量跟不连续结构有关的语义学问题：如&的&字结构的计算问题，不可化归的广义量词的计算以及广义量词辖域的排歧。

Noticeably, after long time sediment and stabilization, the soil structure, soil water content and the vegetational cover conditions of subsidence area are tend to those of nature area. Although abundant water support is unable, it is favor to the sand plant for maintain their growth.

值得说明的是，塌陷稳定区经过长时间的沉压、密实后，其土壤层结构、土壤水分含量等性质以及地表植被覆盖程度均越来越趋近于未塌陷区，对于沙生植被而言，虽得不到充分的供水条件，但仍能维持其生长。

And the design method for U-steel yieldable support and combined structure of steel and concrete is discussed.

论文首先介绍了地下工程支护结构理论的发展及其研究现状；结合五轮山煤矿施工现场，论文采用超静定结构力学计算方法、有限元的分析方法，主要对浅埋强风化段支护结构进行了力学分析；在总结现有文献研究成果的基础上，分析了型钢与混凝土的粘结机理，介绍了U型钢可缩性支架缩动前后的内力计算方法，讨论了考虑U型钢可缩性支架稳定性的承载能力问题，阐述了U型钢可缩性支架参数选择的原理。

The multiple regression analyses of five variables related to market structure represents that the values of concentration degree and market share alike have positive effects on the value performance whereas the values of market share rate squared and labor density alike have negative effects on the value of performance. These results support our hypotheses in this study.

另外从实证分析的结果来看，与市场结构相关的5个变数，其中市场集中度、市场占有率与绩效为正相关；而市占率平方及劳动密度为负相关，大致上与我们的假设相符。

Surplus sand that has not been embedded within the structure acts as a buttressing support while the solidification process takes place .

剩余砂尚未嵌入结构作为支撑的支持，而凝固过程发生。

This text is aimed at researching the problem exists in the train of gymnastics forces in support and manage and how to optimize our structure of team under new rule in order to go along embattling and fend to achieve the team championship of women's gymnastics.

本课题旨在研究2008年奥运会我国女子竞技体操后备力量训练和管理中所存在的问题，以及在新规则下如何优化队伍结构进行排兵布阵，力争夺取女子团体冠军。

Promote sustainable development ,it not merely give full play to science and technology of advancing informationization and guide strength,optimizing up to industrial structure,using resources resonably,improving ensuring strength of environment and mounding the support strength of the talent competition advantage and building scientific an technical innovation system in conformity with sustainable devedopment.

促进可持续发展，不仅要充分发挥科技对推进信息化和产业成长的先导力、对产业结构优化的提升力、对合理开发使用资源的利用力、对改善环境的保障力和塑造人才竞争优势的支持力，而且要建设与可持续发展相适应的科技创新体系。

Exercise increases synaptic plasticity by directly affecting synaptic structure and potentiating synaptic strength, and by strengthening the underlying systems that support plasticity including neurogenesis, metabolism and vascular function.

锻炼能增加突触的可塑性，主要通过直接影响突触的结构、增强神经键强度、加强支持可塑性的背景（包括神经发生、代谢和脉管功能）。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。