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The main research work of this paper are focused on following areas:(1) Based on review of the theory and methods on measurements of particle fields, a new idea for obtaining particle size and velocity distribution within a spray through imaging the particle field with a laser light sheet was put forward;(2) A DPIV (Digital Particle Image Velocimetry) system, is fit for velocity measurements of low speed flows, was developed and expended to particle size distribution measurement;(3) An arithmetic for particle velocity field reconstruction was developed, and the velocity distribution of water mist was also obtained;(4) A software system for particle analysis, which based on image geometry emend, de-noise and image partition was developed, the parameters such as particle size distribution, mean diameter, number of particles, minimum and maximum diameter can be got with this system;(5) A water mist system was developed and its characteristics, such as droplet velocity, size distribution, number of droplets and spray cone angle under different conditions were obtained from experiments with PIVS;(6) The measurement results of water mist characteristics with PIVS were compared and analyzed with the simply simulated results, and in addition, in order to verify the accuracy of PIVS, some experiments were conducted with the standard particles, such as glass-ball with known mean diameter of 50μm and 115μm, metallic coated tracing particle with mean diameter of 12μm;(7) Some experimental studies on interaction of water mist with liquid pool fires were conducted.

本论文的主要工作包括以下几个方面：（1）在对粒子场测量的相关理论和具体方法进行综述分析的基础上，提出了通过采用激光片光对粒子场进行成像以获取其粒径和速度等参数分布的新思路；（2）研制了适宜于低速流动速度场测量的DPIV(Digital Particle Image Velocimetry)系统，并使其实现了对粒子场粒径分布的测量功能；（3）研制了基于粒子运动轨迹的速度场重建算法，获取了细水雾雾场的速度分布；（4）研制了基于几何校正、去噪、图象分割等图象处理方法的"粒度分析软件系统"，该系统既可分析给出粒子场的粒径分布直方图和平均粒径，还可给出粒子的数目以及最大、最小粒径等信息；（5）建立了一细水雾发生系统，并应用上述方法对不同压力条件下细水雾系统的雾场特性（如速度分布、雾滴粒径分布、雾滴的数目、喷雾张角以及雾化长度等）进行了实验测量研究；（6）对细水雾特性参数的PIVS测量结果与计算机简单模拟计算结果进行了定性比较分析，并利用平均粒径为50μm和115μm的玻璃球以及12μm的标准示踪粒子对PIVS系统的粒径和速度测量结果进行了实验验证，同时对其局限性进行了分析讨论；（7）对不同工况条件下细水雾与油池火相互作用的过程进行了模拟实验研究。

These works represent the emersion of nature, the experience of nature, and especially focused on the expression of nature.

这些作品在表现"自然的再现"、"自然的体验"的同时，更注重对"自然的描述"。

In the course of the past year, my colleagues and I have focused on how emotional intelligence operates at work.

在去年的研究中，我和同事们把重点放在了情商是怎样发挥作用这个问题上。

With the development of project management, more and more emphases focused on the researches of information system of project management.

随着项目管理的发展，人们越来越重视项目管理信息系统的开发。

Career education has generally focused on helping people understand the relationship between education and work and acquire employability skills.

就业教育会聚焦于帮助人们理解教育和工作的关系，并帮助人们获得职业技能。

Like many other Central and South American countries, Costa Rica has focused on developing its export sector and on increasing foreign direct investment as a means of generating employment and foreign exchange.

像许多其他中南美洲国家，哥斯达黎加重点发展了出口部门和增加外国直接投资作为一种手段，创造就业机会和外汇。

Firstly,the paper introduces some related concepts of employment and exchange rate,focused on the difference between the nominal and real exchange rates,price index that impacts the calculation of real effective exchange rate,characteristics of the labor market and the present situation and major issues of labor-intensive industries in China,and reviews the academic study of the relationship between the change of exchange rate and employment and explains the research characteristics of this paper.

本文首先对与汇率和就业的相关概念进行解析，重点讨论了名义汇率与实际汇率的区别、影响实际有效汇率计算的价格指数、劳动力市场的特征及劳动密集型产业在我国存在的现状及主要问题，回顾了学术界研究汇率变动与就业关系的相关成果，阐述了本文的研究特色。

Firstly,the paper introduces some related concepts of employment and exchange rate,focused on the difference between the nominal and real exchange rates,price index that impacts the calculation of real effective exchange rate,characteristics of the labor market and the ...

本文首先对与汇率和就业的相关概念进行解析，重点讨论了名义汇率与实际汇率的区别、影响实际有效汇率计算的价格指数、劳动力市场的特征及劳动密集型产业在我国存在的现状及主要问题，回顾了学术界研究汇率变动与就业关系的相关成果，阐述了本文的研究特色。

Fire accident in the underground emporium is more focused by many people in the world along with fire accident frequency happened.

随着火灾事故的频繁发生，地下商场的火灾越来越受到人们的关注。

I have always loved Google's incredibly empty and clean search page, it's focused on just one thing: finding what you want.

我总是很喜欢谷歌令人难以置信的空和清洁的搜寻网页，它的重点只是一件事：寻找就是你想要的。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。