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Diethylene triamine had good control of the synthesizing of ZnSe nanocrystal, but the condition of high temperature and strong alkalescence had negative influence on the morphology of nanofibers. PAN and MMA-BMA-AA nanofibers whose diameter were about 200nm could be electrospun by optimize technics summed by experiment.

通过实验总结出制备PAN与MMA-BMA-AA静电纺纳米纤维优化纺丝工艺，可纺出直径在200nm左右的PAN／MMA-BMA-AA纳米纤维毡，所得聚合物纤维包含一定数量的羧基，Zn~(2+)在溶液条件下可与之配位。

Objective: To optimize the preparation of Trimeresurus tea extraction process and the physical and chemical methods for clarification of the extract obtained in extraction technology to clarify the optimal conditions for a variety of conditions.

摘 要：目的：优化竹叶青茶制备的提取工艺并用物理及化学方法对提取液进行澄清，得到了提取澄清技术中各种条件的最优条件。

Completing the selection of well pattern, establishment of hydrocarbon reservoir geologic model, and calculation of fluid PVT, and triphase relative permeability determination, and reserve fitting and history matching, the programs are designed to improve oil recovery of WAG and simulate performance prediction, and also optimize the programs.

在完成井组的选取，油气藏地质模型的建立，流体PVT相态计算，油、气、水三相相对渗透率的确定，储量拟合和历史拟合以后，研究了气水交替注入提高采收率方案设计、动态预测模拟研究，实行了开发方案的优选。

Objective: To optimize the extraction process of the total triterpene of Centella asiatica from Centella asiatica L.

目的：采用正交实验优化从积雪草中提取积雪草总苷的工艺。

Because the traditional PID exists the shortcomings of unadjustment of parameters and inferior real time nature,the Genetic BP neural networks PID control algolithm is proposed in the dissertation. The Genetic algorithm and BP neural networks are introduced to optimize three control parameters.

由于传统PID控制算法存在控制参数不可调，控制系统实时性差等缺点，本文提出遗传BP神经网络PID控制算法，用遗传算法和BP神经网络对PID控制参数进行在线优化。

In order to eliminate the defects in traditional design, the selected lens groups are assembled into a system and multiconfiguration method is adopted to optimize the length of different object distance. In this way, the problem of uncontrollability of short-distance imaging quality was solved.

针对内调焦传统设计方法的不足，在对内调焦各镜组选型后将它们组合成为一个系统，采用多重数据结构设计的方法，对不同物距下的结构进行同时优化，从而解决了近距离的成像质量难以控制的问题。

Objective: To analyze the initial imaging of unenhanced CT in cerebral venous sinus thrombosis/cerebral venous thrombosis, and to optimize imaging diagnostic approach in order to decrease misdiagnosis.

目的：分析脑静脉窦／脑静脉血栓形成CT平扫的影像学表现特征，以便提高CT平扫对CVST/CVT的早期认识，优化诊断方法，减少误诊。

The genomic DNA of Unio douglasiae, collected from Suya Lake, Henan Province, was used as template DNA to optimize the RAPD-PCR reaction conditions including the concentration of DNA template, random primer, dNTPs, Mg2+ and Taq DNA polymerase and the annealing temperature for thermal cycle.

以河南宿鸭湖圆顶珠蚌的基因组DNA为模板，对淡水蚌类RAPD反应体系中的模板DNA浓度、随机引物浓度、dNTPs浓度、Mg~(2+)浓度、Taq DNA聚合酶浓度和和热循环参数中的退火温度进行了优化。

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。

And to generate the smallest code, compile with link-time code generation on, optimize for size, turn string pooling on, and enable COMDAT folding and eliminate unreferenced data.

并生成最小的代码，编译链接时代码生成的，优化的尺寸，在打开串池，使COMDAT折叠和消除未引用的数据。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。