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Different kinds of yarns have different structures and performance because of different spinning type. A rotor-spun composite yarn spinning system was developed which produces different kinds of compo...
Arc pressure is one of the key factors for variable polarity plasma arc(VPPA) and welding pool formation. In this paper, VPPA pressure was measured by pressure transducer and U-tube barometer methods....
Arc pressure is one of the key factors for variable polarity plasma arc(VPPA) and welding pool formation. In this paper, VPPA pressure was measured by pressure transducer and U-tube barometer methods.
In the quest for energy conservative building design, there is now a great opportunity for a flexible and sophisticated air conditioning system capable of addressing better thermal comfort, indoor air...
The performance of a new design of batch solar water heater has been studied. In this system, the collector and storage were installed in one unit. Unlike the conventional design consisting of small d...
Experimental Analysis of the Effect of Exhaust Gas Recirculation (EGR) on Engine Performance and Exhaust Emissions on Diesel Engines
The primary goal of this study was to evaluate the deflections and bending moments of buried High density polyethylene (HDPE) pipes. The performance of buried HDPE pipes subjected to live loading was ...
The e ects of di erent fuel cetane numbers and fuel injection pressures on a diesel engine emission were investigated. For this purpose, fuels with 46, 51, 54.5 and 61.5 cetane numbers were tested in ...
以单个沙粒为对象,研究了沙粒与灌水器流道壁面的碰撞过程。采用计算流体力学CFD数值模拟方法,分析了沙粒与壁面碰撞反弹系数Rc对灌水器抗堵性能的影响。结果表明,反弹系数对灌水器抗堵性能影响较大。利用粒子跟踪测速技术PTV,观测了复杂迷宫流道内沙粒与壁面碰撞过程,测定了不同压力点下矩形流道的碰撞反弹系数,为灌水器数值模拟时反弹系数的设定提供了实验依据,从而可以更加准确评估灌水器抗堵性能。
A pile driver is a large construction machine used for ground improvement and foundation work. In recent years, there have been some reports of accidents in which the machine overturned. An investigat...
在一台由柴油机改造为二甲醚进气道喷射的发动机上,用离散小波变换分析正常燃烧工况、爆震工况的缸内压力,计算其在各尺度细节部分的能量特征值,研究二甲醚HCCI燃烧的爆震特性。结果表明,正常燃烧工况、爆震工况缸内压力的能量特征值分布具有明显的规律。正常燃烧工况时,细节部分D3的能量特征值最大;爆震工况时,细节部分D1的能量特征值最大。转速升高或进气道喷射燃料添加LPG对正常燃烧工况、爆震工况缸内压力能量...
In order to follow the kinetics of desorption of the aqueous solution (KCl “0.2M”) which occur in three orthotropic directions, this work uses the indirect method of conductimetric measurement. An ani...
Coherent transmission systems using PDM-QPSK format are found particularly robust to the constraints of all-erbium amplifiers based, transparent terrestrial networks when operating at 100Gb/s channel ...

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