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- The emission frequency of the Karman vortex street occurred in series from the blades and tongue is varing with the running condition. 将流程泵叶轮叶片和压水室的隔舌看作旋涡发生体,在不同运行工况下在叶片后缘以及隔舌两侧串联发生的卡门涡街的发射频率是不同的。
- Through compaction hardness and analog shear rock failure test to drilling core, the paper discusses the possibility of discriminating downhole rock type by using rock acoustic emission frequency. 通过对钻井取心岩样压入硬度及模拟剪切的破岩试验,探寻利用岩石的声发射频率来判别井下岩石类型的可能性。
- The emission of visible light by a hot object. 白热光物体遇热发出可见光
- He varied the transmission frequency. 他变换了无线电传送的频率。
- The amount or rate of emission or ejection. 排放量流量、流速，或排出量，排出的速度
- A unit of frequency equal to one cycle per second. 赫兹频率的单位，等于每秒一周
- Fatal accidents have decreased in frequency over recent years. 近年来死亡事故发生的频率已经下降。
- Emission and propagation of energy in the form of rays or waves. 发射以光线或波的形式发出和传播能量
- We can often correlate age with frequency of illness. 年龄的大小往往与发病率有关。
- Accidents on that highway are happening with increasing frequency. 那条高速公路上车祸发生得越来越频繁。
- One set of provisions tightens emission standards. 一套使排放标准更加严格的规定。
- A brief, sudden emission of air, vapor, or smoke. 一阵烟空气、蒸汽或烟雾短促而突然的散发
- An example is the emission of light from matter. 物质的发光即为一例。
- It is the natural frequency of emission of the hydrogen atoms in space . 这是空间氢原子“释放”的自然频率。
- He tuned his radio to the police frequency. 他把无线电调到警方的频率。
- More stringent fuel and vehicle emission standards. 收紧车用燃料及车辆废气排放标准。
- Emission of light from the sun is strong. 阳光的照射很强。
- Emission of smoke from chimneys is an offense. 在这里排放烟雾是违法的事情。
- SPECT: Single Photon Emission Computer Tomgraphy. 单光子发射计算机断层扫描仪。
- X-ray emission of supernova remnants. 超新星遗迹的X射线辐射。
