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This dissertation sets up a physical model consists of the caudal fin, the muscles and the spring, and also gives a mathematical model of the optimal compliance of the spring. Some simulations are carried out. The simulation results says that the elastic element can increase the propulsion efficiency, which provides a technical way for promoting efficiency of underwater propulsors.

本文给出了一种含有弹性元件的肌肉—弹性元件—尾鳍的物理模型，在游动能量损耗最低条件下，建立了求解弹性元件最佳柔顺系数的数学求解模型，并进行了仿真研究，研究结果验证了弹性元件对提高推进效率的作用，为提高仿鱼水下推进器的推进效率提供了一种技术上的解决途径。

Optimal LDMOS Design and Fabrication in BCD Technology ...

各种不同制程与设计参数的变动，观。

The location of this Club Hotel is optimal: Only 500 metres separate the hotel from the beach at the Balaton - lake.

酒店提供著名的匈牙利热情好客服务以及现代化健身设施，包括一个漩涡浴缸、一个游泳池和理发店-是这个地区一个小型独特的宾馆。。。。

P in Shule River Alluvial Fan Oasis in Gansu subsidized by CNSF. Through field geological and environmental observations and sampling, quartz OSL dating, organic carbon ~(14)C dating, as well as analysis of TOC,grain size and Pollen assemblage of the samples from ten sediment profiles in front fine grain sediment zone of the Shule River Fan, the results obtained as follows:(1)The vegetation evolution history on Shule River Alluvial Fan and circumjacent since about 13 ka B.P. could be divided into 6 phases: about 12.1-13.1ka, a sparse coniferous and broadleaf trees - shrub grassland, cold and wet climate; 9.2-12.1ka, shrub grassland, temperature rising but precipitation and humidity getting down; 5.8-9.2ka, sparse forest with the most flourish shrub grassland under the optimal climate; 4.3-5.8ka, coniferous and broadleaf mixed forests -shrub grassland, temperature rising slightly and getting dry; 4.3-2.8ka, grass vegetation and climate became more dry; 2.8-2.3ka, coniferous forests -shrub grassland, precipitation and temperature getting down, but a higher relative humidity.

本文依托于&甘肃疏勒河冲积扇5万年来古天气环境与古水文演化&项目，以疏勒河冲积扇为研究对象，通过对疏勒河冲积扇扇缘细土带全新世古天气和古水文演变进行了20余个剖面的观测和取样、石英OSL和~(14)C测年、粒度组成和TOC分析以及孢粉鉴定，获得了以下成果和熟悉：(1)距今约13ka年来冲积扇和周边植被演化经历了6个阶段：约13.1～12.1ka，以针叶林为主的针阔混交林～灌丛草原，天气冷湿；12.1～9.2ka，灌丛草原，气温升高，降水量较低；9.2～5.8ka，疏林灌木草原，植被茂盛，温度和降水最佳；5.8～4.3ka，以针叶树为主的针阔混交林～灌丛草原，气温较高，降水减少；4.3～2.8ka，草原植被，天气变干；2.8～2.3ka，针叶林～灌木草原，降水减少，温度降低，相对湿度有所增加。

The optimal culture conditions of brewer's yeast were obtained by orthogonal test.

通过正交试验得出其较佳的培养条件为培养液pH5 3、温度 30℃、接种量 0 5%、培养时间 1 6h、培养液浓度为啤酒酵母水解液原液∶水=1∶0 5。

In order to get the optimal solution of an inverse problem,we analyse systematically the double perturbation processing technique, the first order Bor...

为了得到反问题的最优解，文中系统地研究了层状介质中双摄动处理技术，以及层状介质中波场摄动的一阶 Born 近似解与理论重力异常摄动解。

Results The optimal host bact...

表达载体在最佳条件下表达时，目的蛋白的最高表达量占菌体总蛋白的43.5%。

Wastewater of azo dye was photodegraded by the photocatalyst TiO_2 and the optimal technique condition was obtained.

对含偶氮染料工业废水进行光催化降解，寻求光催化降解偶氮染料的工艺及条件。

Third, the optimizing dynamic performance and economic performance shift law are analyzed. An optimal work model of AMT is discussed.

对动力性和经济性评价参数的计算模型进行了推导，编制了这两种参数的计算程序。

Start-up working condition is the key to the research of optimal engagement of automatic clutch for AMT.

起步工况是汽车AMT系统自动离合器最佳接合规律研究的难点。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。