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In this paper, the performance of the mist eliminator was investigated by numerical simulation and experiment.

本文用数值模拟模拟实验的两种方法研究了这种除沫器的除沫性能。

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。

The simulation of emulsification nozzle with medium water is investigated in the pressure of 300 MPa.

采用流体模拟软件,对乳化喷嘴在300 MPa下以水为介质进行模拟分析,得到了引流区、碰撞区、射流区的速度、剪切应力和湍动能分布规律图。

In this thesis, a new detection method, Network Intrusion Detection based on Unsupervised Clustering and Chaos Simulated Annealing algorithm, is proposed. NIDCCSA utilizes the ergodic property of chaos to complete the perturbation of states. Therefore, simulated annealing algorithm based on chaos is more likely to converge to the globally optimal solution and enhance the detection rate.

论文中提出使用聚类和混沌模拟退火算法进行网络入侵检测——NIDCCSA算法,NIDCCSA算法充分利用了混沌的遍历性特点进行状态的变换,这样的混沌模拟退火算法更加可能收敛到全局最优解,从而提高检测率。

Based on the analysis of error characteristics and performance effect of the mostly used crystal oscillator, a method to simulate the frequency error of crystal oscillator is proposed. The major idea is to determine the Allan variance parameter of each main stochastic error component at the given sampling interval at first, then to deduct a set of corresponding frequency error series and superpose them together.

该文对在GPS接收机中使用最多的晶振的误差特性和性能影响进行了分析,在此基础上提出了一种模拟晶振频率误差的方法,即首先确定晶振在给定取样时间间隔上各主要随机误差成分的Allan方差参数,由此反演产生相应的各项晶振频率误差模拟序列并进行叠加。

The simulation of laser welding temperature field by computer can help understand it, and build the foundation for the simulation of welding stress, and offer essential reference for welding parameter selecting.

利用计算机模拟激光深熔焊的温度场可对进一步的焊接应力模拟提供基础,对焊接工艺的确定提供有意义的参考。

In order to overcome the wet etching disadvantage and to minimize the additional waste chemical treatment cost, therefore the purpose of this thesis is to study the customization of the batch type plasma dry etcher for power diode process, to analysis the etching mechanism and build up the simulation model for the distribution of plasma power density that will be fitted with the measurement data.

在此前提下,本论文将以客制化的多片式电浆蚀刻机为研究主体,分析其蚀刻机制并建立电浆能量密度的分析模拟模型,并以实验数据做比对,藉此建立模型模拟数据的可信度。

We designed and simulated the ethylamine separation system using Aspen Plus. The optimal parameters such as theoretical plate number and reflux ratio were obtained.

利用模拟软件Asp-en Plus对乙基胺分离系统进行了设计和模拟计算,得到了各塔理论板数和回流比等设计参数。

The principle make use of the MATLAB's comprehensive signal simulate capacity, imitate the signal of leaking and environment noise examinate from two sensors.

本实验利用MATLAB强大的信号模拟能力,模拟出两传感器中测得的声音信号,即管道泄漏信号和环境嘈声的叠加信号,再用汇编语言编制相关算法程序,用实验验证了相关检漏原理。

BUse the experimental method to examinate the proposed relation obtained from the numerical simulation. The state of simulated degradation is mainly expressed by the parameters such as speed of P wave, the thickness of upper layer of concrete and interval of cracks.

另一为探讨实际量测混凝土版劣化后其反应频谱各振幅尖峰频率值之关系,并与数值模拟分析之结果相互验证,模拟劣化状况主要是以P波波速、混凝土上层厚度与裂缝间距作为变数,进而探讨对振幅频率的影响。

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And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时,论述了一体化管理体系构建中的几个主要问题,包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。

If you're huffing and puffing at any point during the run, slow down and make sure you can take deep breathes.

如果你任何时候在跑步过程中气喘如牛,降低速度并且确保你能够深呼吸。