查询词典 experimental research

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。

OBJECTIVE To review the fundamental research and the experimental study of vascular endothelial growth factor.

目的 综述血管内皮细胞生长因子的基础研究及其在组织修复中的应用。

According to the current research situation of biomechanics in eurythmics、developing trend of biomechanics and development requirement of eurythmics,this paper analyzes the application and developing trend biomechanics in eu- rythmics,though spoils biomechanics and experimental study method,in order to offer theoretical reference for sports practice of eurythmics.

运用多种运动生物力学的理论力学和实验研究相结合的方法，对艺术体操运动中的多个领域进行分析和研究，是运动生物力学在艺术体操运动项目中的研究发展趋势，以期为运动生物力学如何更好地结合艺术体操专项特点为艺术体操运动实战服务提供借鉴。

Many research groups expatiate on the mentioned experimental methods, data and theory to accelerate the development of this field.

很多作者对涉及的实验方法、实验数据和理论研究进行了系统的阐述，大大地促进了这一领域的发展。

Experimental animals, life science and medicine research and the important supporting conditions.

实验动物又是医学、生命科学研究的基础和重要支撑条件。

University laboratory technical team plays an important role in experimental teaching, science and technology research and external service etc.

高校实验技术队伍是高校实验教学、科研、对外服务等方面的一支重要力量。

The general results of exploratory research is experimental and temporary, or as the beginning of further study.

探索性调研的结果一般只是试验性的、暂时性的，或作为进一步研究的开始。

The paper introduces some researches, such as a new method to calculate the added mass for the seismic analysis of the fuel assembly in fast breeder reactor, simulation on the vortex shedding of double heat exchange tubes in a steam generator, simulation on the vortex shedding caused by the cross -flow over plates in a fuel assembly of an advanced reactor, the research on the impacting phenomenon of the free-surface on the vessel head in a storage tank as the main vessel of the China Experimental Fast Reactor shaken by the earthquake, and the researches on the solution of the liquid sloshing by moving particle semi-implicit and the scattering phenomenon caused by sloshing, and so on.

本文介绍华北电力大学在该方面的一些研究进展，例如，快堆燃料组件抗震分析新的流体附加质量计算方法研究；蒸汽发生器换热管双管漩涡脱落的数值模拟；一个先进堆燃料组件平行板上流动引起的漩涡脱落数值模拟；由地震引起的自由表面对快堆主容器冲击现象的研究；移动粒子法求解液面晃动及晃动引起离散现象的研究等。

According to the interaction between the cutting grains and the liquid medium, integrating the theoretic analysis with experiments, and referencing the experimental formula, the sedimentation law of cutting grains in the dynamic solid/liquid separator by compressing and filtering is discussed. The theoretical exploration and research are conducted on the grain-forcing situation, axial sedimentation, sedimentation in the centrifugal force field etc., and the final sedimentation velocity of the cutting grains is obtained in the separator.

文章从岩屑颗粒与液相介质之间的相互作用入手，采用理论分析和试验研究相结合的方法，参照经验公式，讨论了固液动态压滤分离机中岩屑颗粒的沉降规律，对动压机内颗粒的受力情况、轴向沉降、离心力场沉降等问题进行了理论探讨和研究，得出了岩屑颗粒离心沉降末速度。

This research uses the hydraulic model as an experimental tool. In different slopes (S=1/8、S=1/10), flow rates (Q=0.016cms、Q=0.032cms、Q=0.048cms), and the angles (θ=30°、θ=45°、θ=60°) of blocking pieces in the modified boat-passage fishway, the velocity and depth were measured.

本研究以水工模型作试验，藉由改变改良型舟通式鱼道之阻流材角度(θ=30°、θ=45°、θ=60°)，在不同坡度(S=1/8、S=1/10)与流量(Q=0.016cms、Q=0.032cms、Q=0.048cms)下，量测流速及水深以观测水理变化。

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。