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;文献标志码:A 文章编号:1672-7207(2013)07-2726-10 Earth pressure balance control based on feedforward-feedback compound control WANG Lintao, GONG Guofang, YANG Huayong, HOU Dianqing (State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China) Abstract: In order to compensate the earth pressure disturbance......
) Abstract: The effects of preheating temperature of filler particles, casting temperature, filling pressure, filler particle size etc on the new casting method named counter-gravity infiltration... in this work. The results show that the key factors for the preparation of lead-based porous materials by counter-gravity infiltration are casting temperature, filling pressure and preheating temperature......
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composites by precursor infiltration and pyrolysis YU Hai-jiao(于海蛟)1, ZHOU Xin-gui(周新贵)1, WANG Hong-lei(王洪磊)1, ZHAO Shuang(赵 爽)1, YANG Jian-gao(羊建高)2, HUANG Ze-lan(黄泽兰)2 (1. College... fiber fabric reinforced silicon carbide (2D-SiC/SiC) composites were molded by stacking method and densified through precursor infiltration and pyrolysis (PIP) process. SiC coating was deposited......
Simulation of fuzzy control systems for nonferrous alloy vacuum counter-pressure casting YAN Qing-song(严青松)1, CAI Qi-zhou(蔡启舟)1, WEI Bo-kang(魏伯康)1, YU Huan(余 欢)2, YU Zi-rong(俞子荣)2 (1. State... simulation analyses of vacuum counter-pressure casting fuzzy control systems based on MATLAB, fuzzy control systems designed by simulation can track technical route established well. When transmission......
to the fact that when the dispersing agent is suitable, vacuum freeze-drying could decrease the aggregation caused by capillary pressure, hydrogen and chemical bonding.Key words:CNTs; re-dispersibility... or vacuum freeze dryer. Scanning electron microscopy (SEM) and UV-Vis spectrophotometer were used in characterizing the morphology and re-dispersibility of CNTs before and after drying processes......
pressure were 1823 K and 5–35 Pa, respectively. Above all, both the theoretical and experimental results showed that volatilization behaviors of Mo and S during vacuum decomposition process of molybdenite... the whole vacuum decomposition process. While the temperature was below starting decomposition temperature (1491 K or 1575 K), the saturated vapor pressure of MoS2 was smaller than the pressure in furnace......
>) Abstract: Activated carbons were prepared from walnut shells by vacuum chemical activation. The effects of system pressure, activation temperature and impregnation ratio... condition. Vacuum condition is beneficial to develop microporous structure, and mesopore tends to be well developed at high impregnation ratio. The activated carbon prepared at system pressure of 30 kPa......
substance is separable in vacuum distillation is the differences of the vapor pressure in pure state. The relationship of vapor pressure and temperature between PbS and pure Bi is shown in Fig.1. It shows when the temperature is higher than 900K, the vapor pressure of PbS is greater than that of Bi, that is, at appropriate vacuum distillation temperature, PbS will volatilize prior to Bi......
500 cycles. The inner pressure of the batteries during overcharging is lowered and the charging efficiency of the batteries is improved. Key words: surface modification; vacuum evaporation plating... with a thin silver film using vacuum evaporation plating technology. The electrochemical properties such as the charge-discharge characteristics, the cycle life and the inner pressure of the batteries......
