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搜索结果: 1-15 共查到工学 high pressure相关记录68条 . 查询时间(0.156 秒)
Iowa State University researchers have developed new nanoscale technology to image and measure more of the stresses and strains on materials under high pressures.The researchers reported the results o...
The symposium will be an interdisciplinary meeting for discussing recent trends and developments in the science of materials submitted to extreme conditions of pressure. The development and disseminat...
武汉理工大学船舶辅机课件Chapter14 HIGH PRESSURE FITTINGS
武汉理工大学船舶辅机课件Chapter13 HIGH PRESSURE FITTINGS
We determined high pressure processing (HPP) effects on the activities of cathepsins B and D in the muscles of mackerel (Scomber scombrus) and horse mackerel (Trachurus trachurus). In mackerel, the ca...
The goal of this work was to design mixed vegetable (vegetable-fruit) juices which are preserved by high pressure, have an increased content of bioactive substances, are made from locally available pr...
Organoleptic changes in sterile triploid oysters (Crassostrea virginica) induced by high pressure processing (HPP) were investigated. Because pressure treatments evaluated were greater than current in...
This paper demonstrates the effectiveness of outer-cover of pressure vessel in order to prevent risk scenario by brittle fracture. The Fail-Safe design introducing the concept of a standby redundant s...
In this study, culture-dependent and culture-independent approaches were used to reveal the microbial diversity and dynamic changes occurring in sliced vacuum-packed cooked ham after high pressure pro...
The effects of high-pressure and heat pretreatments, used prior to drying, on the rehydration rate and quality of sweet potato was investigated. Sweet potato was pressurized at 200 Mpa for 5 min and h...
Microstructure analyses of high-pressure die-casting AM50 magnesium alloy are presented. Investigated pressure casting was produced on a cold chamber die-casting machine with locking force at 1100 ton...
Microstructure analyses of high-pressure die-casting AM50 magnesium alloy are presented. Investigated pressure casting was produced on a cold chamber die-casting machine with locking force at 1100 ton...
以新鲜树莓汁为主要原料,研究了超高压处理对新鲜树莓汁菌落总数变化以及霉菌、酵母菌、大肠杆菌、沙门氏菌存活量的影响。结果表明:压力越高,杀菌效果越好; 保压时间的延长有助于微生物的杀灭,在室温(25℃),压力为200MPa、保压时间为5min时,大肠杆菌被完全杀灭;在压力为300MPa、保压时间为15min时,沙门氏菌被完全杀灭;在压力为400MPa、保压时间为15min时,酵母菌和霉菌...
为了研究直喷式汽油机高压涡旋喷油器喷雾撞壁机理,测量了撞壁喷雾的高度、喷雾半径及喷雾远端速度,分析了不同喷射压力、环境背压、喷嘴到壁面的距离、壁面倾角等因素对撞壁喷雾的影响。随着喷射压力、喷嘴到壁面的距离及壁面倾角的增加,喷雾的贯穿距离增大;环境背压的增大导致喷雾的贯穿距离减小。较高的喷射压力和较低的环境背压增大了撞壁燃油与壁面的接触面积,在壁面上形成的薄膜加速了燃油的蒸发。由经验公式计算得到的撞...
研究了压电式高压共轨喷油系统多次喷射过程中影响主喷油量波动的因素,采用EFS IFR8420型单次喷射仪对预喷和主喷的油量及喷油速率进行精确测量,总结了主喷油量波动的影响因素及其变化规律:预喷油量越小、主预间隔时间越短,主喷油量波动幅度越大,且随着主预间隔时间的增加,主喷油量呈周期性波动且波动幅度逐渐衰减。通过试验确定了预喷产生的压力波动是导致主喷油量波动的主要原因,为后续的多次喷射控制策略的设计...

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