查询词典 comparison

By comparison, the undersea tunnel that is now the world's longest -- the Chunnel, linking Britain and France -- is only 30 miles long.

作为比较，当前世界上最长的海底隧道――连结英国和法国的海底隧道――仅仅有30英里长。

However, we did a side-by-side comparison with our usual cilantro wrapped in a paper towel in a plastic bag.

但我们采用平常包裹在纸巾中并放入塑料袋内的芫荽叶进行了对比。

It is demonstrated that the chiral quaternary ammonium salts catalysts exhibit promising catalytic properties for the substrate. Part III: The synthesis and the characterizing of the macroporous aminomethyl resin-supported cinchona alkaloid complexes and the study on its catalytic properties The part consists of two subsections. the macroporous aminomethyl resin -supported cinchona alkaloid complexes were synthesized by the stuff (cinchonine, quinine and macroporous aminomethyl resin). Their structures were characterized by means of elemental analysis, XPS, TG/DTA; the chiral polymer-supported complexes were first used as catalysts for the reduction of ketones. Their catalytic properties for the reduction processes were investigated. The comparison of the products e.e., the conversion of the substrate among different reduction processes was employed with determined by HPLC. The effects of the time, the temperature, the ratio of catalyst to substrate, reaction solvent as well as the recycle times were also discussed.

第三章聚-4-氨甲基苯乙烯负载金鸡纳碱金属络合物的合成与表征及其不对称催化性能研究本章分为两节，以辛可宁和奎宁及聚-4-氨甲基苯乙烯为原料，合成了4种聚-4-氨甲基苯乙烯负载金鸡纳碱络合物催化剂，并对它们的结构用元素分析、X-射线光电子能谱、TG/DTA等几种测试手段进行了表征；首次将所合成的手性高分子负载的金属络合物用于催化芳香酮不对称还原反应，详细研究了所得的手性高分子负载的金属络合物对不同底物的催化性能，用HPLC等分析手段定量检测了还原过程的底物转化率及其产物对映异构体选择性，并考察了反应时间、反应温度、催化剂和底物投料比、反应溶剂和循环次数对催化性能的影响。

This exhibit displays the inner structure of a cinematograph, the working principle of a motion-picture camera, mechanism for time-lapse photography, sound reproduction of an optical track-changing sound track, and a comparison of film and TV signal definition.

展示了放影机的内部构造，间歇抓片机构工作原理，视觉暂留机理，变积式光学声迹声音还原，比较电影与电视的清晰程度。

Later, it makes some comparison with four kinds of modulation technique, and finally, it implements the three-level PWM switching power amplifier with the PWM technique. The power of the amplifier is 2kVA, and the frequency bandwidth is 10～3kHz. In the thesis, the author designs and makes the hardwares of the switching power amplifier. The hardwares contain power inverter rank circuit, control system circuit based on DSP, drive and isolation circuit, and protective circuit. The thesis also analyses the potential safety problems and put forward some solutions for the problems. Furthermore, the thesis accomplishes the software design of the control system, and successfully debugs it. The methods of designing higher power ampilfier are also discussed in the thesis. It analyses the feasibility of the methods, outlines the way of how to design higher power switching power amplifier, and does some experiments with the method of switches-parallelling.

根据电动振动试验系统对开关功放的要求，提出了以电感电流瞬时值控制技术为基础的三电平脉宽调制开关功放的设计方案，并通过系统仿真进行了原理性论证；然后设计并制作了开关功放的硬件，包括功率转换电路，基于DSP的控制电路，驱动、隔离电路以及保护电路；针对开关功放数学模型不易得出的特点，细致分析了模糊自适应PID控制方法，在此基础上编写了控制程序；研制出一台功率为2kVA，通频带为10～3kHz的三电平脉宽调制开关功放；论文中还探讨了实现大功率开关功放的方法，分析了各种方法的可行性，给出了实现大功率开关功放的思路，并进行了并联开关管实现大功率开关功放的实验。

Based on the comparison with the acquisition algorithm in time domain,the circular correlation algorithm in frequency domain was used for fast acquiring C/A code initial phase and Dopller frequency shift of GPS signal.

在与传统的时域串行搜索捕获算法比较的基础之上，分析了利用FFT实现C/A码初始相位和载波多普勒频移快速捕获的频域圆周相关算法模型。

Thus,simple comparison operation on the indexes of a pixel can determine a pixel belonging to which circular ring,which can save much time.

经过实验验证，改进算法可以大大提高模板匹配的速度，满足半导体封装等自动化作业的需求。

The numeral phrases have the rhetoric meaning of comparison, exaggeration, circumbendibus and antitheses besides original ideas and the source of them mainly coming from Holy Bible, literature work and social life.

数词习语除了具有其本意外，还具有比喻、张、婉、照等修辞意义，其来源主要是圣经、学作品及社会生活等。

A detailed comparison of the use of Appear was made between Chinese Learner Corpus and the native speaker corpus. It reveals the differences in the frequency of the class of word, meaning, collocation and colligation of appear* between the learners' English and the native English speakers' language. Reasons of the misuse and underuse of the word are explored. Some implications of corpus linguistics are given to EFL teaching.

本文对常用词appear在中国学习者英语语料库和英语本族语语料库的使用作对比分析，揭示中国学习者对该词的不同词性、词义、词语搭配和类联结的使用存在着误用、少用现象，分析了影响中国学习者有效习得appear一词的主要原因，突出了语料库对于外语词汇教学的重要意义，以期为英语教学提供一些启示。

The data remained significant for comparison between platelet specific antibody positive rate and HLA Class Ⅰ antibody among hemodialysis patients.

本研究结果显示在血液透析的病患中，比较血小板特异性抗体和人类白血球第一型抗体阳性率有其重要性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。