查询词典 two aspects

Secondly, in the experiment, the characteristic of flux and spray cone of the nozzle is measured and analyzed. Two different kinds of packing, metal and plastic, is applied to evaluate the performance of the saturator. After comparison between the two, it can conclude that metal packing is better than plastic packing in all aspects, and more suitable for high pressure and temperature conditions.

其次，在实验中，测量和分析了喷嘴流量和雾化角的特性，应用金属和塑料两种填料对饱和器进行了实验研究，对比了两种不同填料的性能，发现金属填料比塑料填料具有更好的流体力学和传热传质性能，更适合于饱和器的压力和温度环境。

Firstly, according to the difficulties in the optimization of chemical engineering and the intrinsic disadvantage of deterministic optimization algorithms, this work analyzed the importance and advantage of stochastic algorithms, and proposed some important aspects in research on them. Secondly, genetic algorithm was applied to two problems of data driven modeling, one of which was combination problem, the other was mixed integer nonlinear programming. Thirdly, systemic investigations were made on the basic structure, dynamic behavior and modifications of particle swarm optimization. Lastly, two kinds of proposed PSO algorithms were applied on calculation of phase equilibrium, which is nonconvex optimization.

本文首先根据化工优化中存在的困难和确定性优化算法内在的缺点，分析了随机优化算法的重要性，并提出研究随机优化算法应注意的问题；其次，将遗传算法应用于两个数据驱动建模问题，一为组合优化问题，一为混合整数优化问题；再次，从粒子群优化算法的基本结构、运动行为、改进方法做了系统的研究：最后，将提出的两种改进粒子群优化算法应用于相平衡计算问题，为非凸全局优化问题。

During the calculation the results got by quintic spline kernel was the best so it was chosen as the proper kernel for the SPH simulation. By comparison of the simulation results got by SPH and finite volume method, it was proved that the buffer cells method proposed in the SPH simulation to implement the Dirichlet boundary conditions was accurate, and this is of great importance for the simulation of flows pass a pipe. At last, the SPH method was improved to simulate the liquid-solid two phase flows and the results show that this method was appropriate for the simulation of flows containing viscous fluid and macroscopic solid components. Now the two methods are both able to predict the continuum flows and rarefied flows severally, but the hybrid program still has some aspects to be improved.

首先用标准算例验证了SPH方法的理论模型和计算程序的准确性；通过比较确定选用五次样条核作为计算低雷诺数下的粘性连续流动时的核函数；采用SPH方法和有限体积法分别对同一管道流动进行了对比计算，证明了本文提出的边界缓冲区方法在实现SPH方法中的流体边界条件时的有效性，解决了SPH方法模拟管道流动时的一个关键问题；巧妙地使用SPH方法对化工分离流动中常见的固液两相流及固液耦合作用进行了模拟尝试，获得了较好的结果；在跨尺度计算方面，目前两个子程序已经能够分别模拟连续的和稀薄的二维管流问题，二者的耦合计算程序还处于调试和优化阶段，各个参数对于计算精度和计算速度的影响规律仍在探索中。

An alternative "informational" approach to this problem led to the view that the two fundamental aspects of sex, genetic recombination and outcrossing, are adaptive responses to the two major sources of "noise" in transmitting genetic information.

针对这一问题，一个选择性"信息式"研究探讨产生了这样的观念，认为性的两个基本方面是对遗传信息传递中两个主要的"噪音"来源的适应性反应。

The research is conducted among 651 parents of students in Grade 3 of two key and two common senior high schools in the aspects of basic family situation, student studying quality and family education by questionary.

本研究以两所重点中学，两所普通中学651名高三学生家长中采用问卷调查的方式，从学生的家庭基本情况，学生学习品质，家庭教育三方面在问卷中进行追踪调查。

These two barricades, both of them symbols, under two different aspects, of a redoubtable situation, sprang from the earth at the time of the fatal insurrection of June, 1848, the greatest war of the streets that history has ever beheld.

这两座街垒是在一八四八年那次无法避免的六月起义期间从地下冒出来的，那是一次有史以来规模最大的巷战，从两个不同的方面看，这两座街垒都是那次惊险局势的标志。

Different aspects associating the DMAE-NHS-based CLIA were studied in this thesis,including synthesis of acridinium ester,chemiluminescent characteristics of DMAE-NHS,labelling antibody or streptavidin with DMAE-NHS,two-site sandwich chemiluminescent immunoassay for TSH,two-site sandwich chemiluminescent immunoassay involved biotin-streptavidin system for TSH,and competitive chemiluminescent immunoassay using biotin-streptavidin system for TLVThe desired acridinium ester,DMAE-NHS,was synthesized according to the reference method with some modifications.

目前国内尚未见有关DMAE·NHS的合成及其应用于CLIA的研究报导，本论文研究了吖啶酯DMAE·NHS的有机合成方法，DMAE·NHS的发光性能，DMAE·NHS及其与抗体偶联物的热稳定性，DMAE·NHS标记TSH单克隆抗体和链亲和素，TSH CLIA，TSH BAS-CLIA和TT_4 BAS-CLIA。

Chemiluminescent immunoassay is one of the advanced immunoassay ofnon-radioisotopic immunoassay because of its high sensitivity, wide dynamic range,high accuracy, stable labeled protein, full automation and extensive application field.CLIA using acridinium ester derivatives as chemiluminescent label has advantages oflow background, high signal-to-noise ratio, no need of catalyst and simpleluminescence system. Different aspects associating the DMAE·NHS-based CLIA were studied in thisthesis, including synthesis of acridinium ester, chemiluminescentcharacteristics of DMAE·NHS, labelling antibody or streptavidin with DMAE·NHS,two-site sandwich chemiluminescent immunoassay for TSH, two-sitesandwich chemiluminescent immunoassay involved biotin-streptavidinsystem for TSH, and competitive chemiluminescent immunoassay usingbiotin-streptavidin system for TT〓. The desired acridinium ester, DMAE·NHS, was synthesized according to thereference method with some modifications. The products were identified by IR, NMR,MS and elemental analysis. In our method, KOH was used in place of NaOH tosynthesize benzyl ester of 3,5-dimethyl-4-hydroxybenzoic acid,2',6'-dimethyl-4'-(n-succinimidyloxycarbonyl) phenyl-acridinium-9-carboxylate waspurified on a silica gel column with chloroform/ethylacetate(4:1, v/v) as eluent andfurther purified by triturating with hexane/acetone(2:1, v/v).

DMAE·NHS的合成是本论文的关键和难点，我们对文献方法进行改进：文献方法用氢氧化钠与3，5-二甲基-4-羟基苯甲酸反应制得3，5-二甲基-4-羟基苯甲酸钠，再用3，5-二甲基-4-羟基苯甲酸钠与苄氯作用制备3，5-二甲基-4-羟基苯甲酸苄酯，我们用氢氧化钾代替氢氧化钠，使合成取得成功；在合成2'，6'-二甲基-4'-苯基-吖啶-9-甲酸酯时，文献方法对粗产品进行两次硅胶柱层析纯化，第一次柱层析用氯仿／乙酸乙酯(4∶1，V∶V)作溶剂和淋洗剂，第二次柱层析用己烷／丙酮(2∶1，V∶V)作溶剂和淋洗剂，按照文献方法得到的不是所需要的化合物，我们只进行第一次柱层析纯化，然后用己烷／丙酮(2∶1，V∶V)进行研磨，过滤，洗涤，除去溶于己烷／丙酮(2∶1，V∶V)的部分，得到所需要的产品。

Based on the summary, this paper proposes the urban traffic information system architecture project suitable for the administerial management situation of China. The UTISAP includes a traffic information center, eight subsystems and two databases. Eight subsystems comprise traffic management, ETC, TFGS, traffic information service, GIS, EMS, CVOS and AHS. Two databases comprise the aspects of road traffic management and vehicles management. And the traffic information center is the core.

在总结了国外近年来有关交通信息系统的开发和研究成果后，结合中国在行政管理方面的实际情况，提出了城市交通信息系统的结构方案：一个核心即交通信息中心，交通管理、电子收费、交通诱导、交通信息服务、地理信息、紧急救援、营运车辆管理、车辆安全辅助驾驶八个子系统以及道路交通管理和车辆管理两个数据库，阐述了各子系统的功能。

A term that originally referred to the process by which two or more languages converge to form a new language when different cultural groups interact over an extended period, creolization has been gradually extended to describe the transformations undergone in various aspects of culture when two or more groups come into prolonged contact.

最初这个术语指的是当不同的文化群体长时间相互影响后，两种或更多种语言汇合而形成一种新语言的过程。后来这个词的词义逐渐扩展，用来表达两个或更多的群体经过长时间的接触，其文化在诸多方面所产生的变形。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。