查询词典 essential resistance

With the increase of Reynolds number, the resistance coefficient decreases, and beyond a certain value of Re, it approaches a constant. The effects of the p/e, e/D and rib angle on resistance coefficient in this Reynolds number range were correlated by a power-law equation.

首先，本文首次对弯头中也布置粗糙元的九种转弯通道及相应的光通道进行了静压及阻力测定，得出了阻力系数随p/e（p/e=5，10，20），e/D（e/D=0.025，0.05，0.10）及角度α（α=90°，45°，60°，-45°，-60°）的变化关系，并对数据进行了拟合，得出了相应的关联式。

The impacts of printing process and curing condition on antenna resistance are shown as follows: higher resistance of a printing antenna is generated not only by higher print pressure and velocity, which result in inadequate ink transfer, but also by lower curing temperature and shorter curing time, which can result in imperfect combustion of organic vehicles in silver ink.

印刷工艺与固化条件对天线电阻的影响主要表现在：较高的印刷速度与印刷压力会使银浆转移不充分，并导致天线电阻增加；而较低的固化温度、较短的固化时间也会使银浆中的有机载体不能充分燃烧，从而增加天线电阻。

deviation of the antenna radiation resistance seems larger in some textbooks about the electromagnetic theory for the editors have made some similar treatment when discussing the radiation power of short antenna.combining the concept of physical with mathematical tools and the precise results are gained,that is the real radiation resistance of electric dipole antenna is about ten times smaller than that of the approximate results in the actual literature by researching the electromagnetic field theory and average energy density.this offers evidence to grasp the radiated ability accurately.

小 摘要：在部分有关电磁场理论的教材中，编者讨论短天线的辐射功率时，由于作了某些近似处理而所得天线的辐射电阻值偏差较大。从天线辐射的电磁场理论和平均能流密度出发，使物理概念和数学工具相结合，运用矢量运算推导出精确的结果，即电偶极子天线的实际辐射电阻要比文献中的近似结果小数十倍，因而为准确把握天线的辐射能力提供了依据。

Spray materials are melted or partly melted by flame, electric arc or plasma plume and propelled onto the substrate by compressed gas. The sprayed coating can improve the surface properties of material, such as wear resistance, corrosion resistance and thermal insulation capability.

热喷涂是通过火焰、电弧或等离子体等热源将某种线状或粉末状的材料加热至熔化或半熔化状态，并通过气流吹动使其雾化高速喷射到基体表面，以形成喷涂层的表面加工技术。

The excellent pavement performance on the rutting resistance of SMA compared with dense asphalt pavement is also observed in the field. But the shape properties and morphology of coarse aggregate and asphalt film thickness are believed contribute to affect the rutting resistance of stone mastic asphalt.

相关研究说明SMA 级配粗粒料构架具有互锁机制，有较佳之抗车辙能力及耐久性，即SMA 级配发挥抗车辙能力关键在於粗粒料构架，形成稳固强度以承受载重，惟粗粒料性质对於SMA 级配敏感度高，材料选用及品质控制稍有偏差时，反而降低SMA 沥青铺面成效甚钜。

Ball valve fluid resistance small, and its resistance coefficient with the length of the barrel of equivalent.

流体阻力小，其阻力系数与同长度的管段相等。2。

Ball valve fluid resistance small, and its resistance coefficient with the length of the barrel

球阀流体阻力小，其阻力系数与同长度的管段相等。2。

Fire resistance of Pinus armandii bole were tested with fuel bed designed by the authors during the prohibitive period of forest fire. The mortality rate was accounted with a program developed by the authors with Visual Basic 6.0 after the phloem of samples were soaked with 4% 2, 3, 5-triphenyltetrazolium chloride solutions, then painted and scanned the distributing map of mortal and living phloem, purified the map color with Photoshop. Relationships between fire resistance of the bole and diameter, wood bark thickness, temperature, and heating time were anayzed. Countermeasures of forest fire protection were put forward.

在森林防火戒严期，用自行设计的装置对云南主要造林树种华山松进行了不同温度、时间作用下的树干耐火性试验，用红四氮唑对高温作用后的树干韧皮部进行了染色，经勾绘、扫描后用Photoshop软件将死亡的韧皮部处理成易于计算机识别的纯色，用Visual Basic 6.0编写的程序计算了树干韧皮部的死亡率，初步分析了华山松树干耐火性率与树干直径、树皮厚度、受热温度、受热时间的关系，据此提出了相应的森林消防措施。

Boilers operating wjth both forced and ind.uced draft use the forced draft fan to push air through the combustion air supply system into'the.furnace,The fan must have a discharge pressure high enough to equal the total resistance of air ducts,air heater, burners or fuel bed and any other resistance between the fan discharge and the furnace.

锅炉的运行是使用强制通风风机将空气通过空气燃烧供应系统供入炉内。风机必须有足够高的排气压力来平衡输气管、空气加热器、炉膛或燃料箱及输气管到锅炉之间所产生的全部阻力。

The relationship between resistance of still plane bed and energy slope has been proposed from the similarity between sediment incipient motion and still bed resistance.

从挟沙水流的平均能量方程出发，得到了推移质附加阻力的计算公式及悬移质附加阻力计算公式，并对挟沙水流的阻力进行了讨论。

Apllied the data of QuickBird-2——the highest resolution remote sensing,and based on the theory and methodology of fractal geometry,we have quantitatively studied remote sensing lineations in Gaolong gold deposit of Guangxi.

采用Quick Brid-2高分辨率卫星遥感数据，通过分形几何学的盒计维数法，定量研究广西高龙金矿区遥感线性构造。

So, sometimes, to change the color can not be your food (referring to the above-mentioned crustacean) has been a sign of boiling over.

所以，有时，来改变颜色，不能你的食物一直是沸腾了的迹象。