搜索结果: 151-165 共查到“工学 Investigation”相关记录447条 . 查询时间(0.466 秒)
Experimental Investigation of Capacity Control Scheme on System Performance for a Machine Tool Cooler
machine tool cooler hotgas suction regulation capacity control
2011/8/4
Highly accurate manufacture in machining industry can only be obtained with precise temperature control of the coolant (oil or water). Machine tool with more accurate, stable and advanced the precisio...
Performance Investigation of Cone Dielectric Elastomer Actuator Using Taguchi Method
dielectric elastomer actuator performance objective Taguchi method
2011/8/4
Dielectric elastomer actuator (DEA) show promise for mechatronic applications due to the advantages of dielectric elastomer, such as lightweight, flexible, low cost, high strain, etc, and many configu...
Investigation on Flow Accelerated Corrosion Mitigation for Secondary Circuit Piping of the Third Qinshan Nuclear Power Plant
flow accelerated corrosion nuclear power plant secondary circuit piping
2011/8/4
Flow accelerated corrosion (FAC) is the main failure cause of the secondary circuit carbon steel piping in nuclear power plants. The piping failures caused by FAC have resulted in numerous unplanned o...
Performance Investigation of Cone Dielectric Elastomer Actuator Using Taguchi Method
dielectric elastomer actuator performance objective Taguchi method
2011/8/4
Dielectric elastomer actuator (DEA) show promise for mechatronic applications due to the advantages of dielectric elastomer, such as lightweight, flexible, low cost, high strain, etc, and many configu...
Investigation of level spacing distribution of nuclear energy levels by maximum likelihood estimation method
nuclear energy levels maximum likelihood estimation method Nuclear Theory
2011/10/11
Abstract: The nearest neighbor spacing distribution (NNSD) is one of common methods in statistical analysis of nuclear energy levels. In this paper, we have proposed Maximum Likelihood Estimation (MLE...
Negative pressures in full-scale distribution system: field investigation, modelling, estimation of intrusion volumes and risk for public health
Negative pressures full-scale distribution system field investigation modelling estimation
2010/9/26
Various investigations encompassing microbial characterization of external sources of contamination (soil and trenchwater surrounding water mains, flooded air-valve vaults), field pressure monitoring,...
离心泵压力脉动特性分析（Numerical Investigation of Unsteady Pressure Fluctuations in Centrifugal Pump）
离心泵 数值模拟 压力脉动
2010/12/28
为了研究压力脉动在离心泵不同位置的变化规律及其关系，利用CFD技术对离心泵内部流场进行多工况定常与非定常三维数值模拟，得到内部流场特性及计算点的压力脉动情况，并对其进行频域分析。结果表明，设计工况和大流量工况下，叶频是主要影响频率，而在小流量工况下，轴频是主要影响频率；压力脉动幅值随偏离工况的情况而变化，同一流量下，流道的进出口压力脉动变化大。
燃油粘度与环境压力对喷雾碰撞过程的影响（Investigation of the Influences of Droplet Viscosity and Environmental Pressure on the Spray Collision）
内燃机 喷雾模拟 碰撞模型
2010/12/28
O’Rourke碰撞模型仅仅考虑了碰撞拉伸分离以及聚合，而忽略了碰撞反弹、反射分离以及高韦伯数下的碰撞二次破碎过程，在碰撞分区过程中也忽略了燃油物性以及碰撞环境条件的影响，使得预测的碰撞分区临界韦伯数偏低。复合碰撞模型根据相关的实验结果对碰撞分区进行油滴粘度以及碰撞环境压力修正，考虑碰撞反弹、反射分离、拉伸分离以及碰撞二次破碎过程，提高了碰撞分区的预测精度。基于复合碰撞模型，分析了油滴粘度与环境压...
锥-射流模式下毛细管静电雾化流场的PIV测量（Investigation on Electrostatic Spray of Capillary in Cone-jet Mode Using PIV）
锥-射流模式下毛细管静电雾化流场的静电雾化 锥-射流 雾滴速度 粒子图像速度场仪
2010/12/28
采用粒子图像速度场仪测量了毛细管微射流静电雾化流场，获得了毛细管静电雾化的典型雾化模式和锥-射流模式下雾场中雾滴的速度矢量图与流线图，分析了雾滴在输运过程中的受力情况和静电电压作用下的速度与流线变化。实验结果表明：在静电力与极化力、重力、流体拖曳力等共同作用下，随着荷电电压的增加，雾场流线分布均匀，雾滴在轴线上速度逐渐增加。在任一电压下，随着射流轴向距离的增加，同一截面上雾滴速度都有所增加，且速度...
Field Testing and Investigation of the Dynamic Performance and Comfort of Timber Floors
timber floor fundamental frequency damping ratio comfort field test
2014/4/10
Field tests were conducted on timber floors in three wood-framed buildings in order to obtain their dynamic characteristics and evaluate the vibration comfort. The measured fundamental vibration frequ...
Experimental investigation of shaft transducerless speed and position control of ac induction and interior permanent magnet motors
IPM Motor induction motor sensorless vector control speed and position control high frequency signal injection
2010/10/12
In order to drive AC motors with high efficiency and high motion performance, and to provide accurate speed/position control, motor shaft speed and/or position feedback is required. For this purpose, ...
Investigation of Gelatin Polypeptides of Jellyfish (Rhopilema esculentum) for Their Antioxidant Activity in vitro
jellyfish gelatin polypeptide antioxidant activity copper(II)-binding ability
2010/10/14
Jellyfish gelatin was hydrolyzed by different proteases to obtain antioxidative polypeptides.
The gelatin hydrolysate obtained by progressive hydrolysis using trypsin and
Properase E exhibited the h...
Investigation into the mechanical properties and metal creaks of a diesel locomotive wheel
diesel locomotive wheel-set wheel metal metal cracks hardness chemical composition wear
2010/10/29
After JSC ‘Lithuanian Railways’ (AB ‘Lietuvos geležinkeliai’) bought new Siemens ER20 CF locomotives produced in Western Europe and brought them into service, some of them have already done about...
Investigation into traffic flows on high intensity streets of Vilnius city
vehicle classification traffic intensity trucks visual method loop detector tube detector counter-classifier video detector
2010/10/29
The measurements and analysis of traffic intensity were performed in the capital city – Vilnius, the largest urban area in Lithuania. Vilnius is a centre of business, industry and tourism, and therefo...
Theoretical investigation of methane adsorption onto boron nitride and carbon nanotubes
Theoretical investigation methane adsorption onto boron nitride carbon nanotubes
2010/10/12
Methane adsorption onto single-wall boron nitride nanotubes (BNNTs) and carbon nanotubes (CNTs) was studied using the density functional theory within the generalized gradient approximation. The struc...