查询词典 instantaneous angular velocity

Using the small diameter velocity string to accomplish the primary completion or the recompletion has much benefit for increasing the flowing velocity, preventing liquid loading, improving the breakthrough recovery, enhancing the lifting capacity, and insuring normal production of gas well.

通过安装小直径CT管柱实施一次完井或在现有生产油管内安装CT速度管柱实施二次完井，有利于增加生产流速、预防井底积液、提高气井无水采收率、增强积液井排液能力及确保气井正常生产。

The recompression phenomena have been found in the particle velocity histories of alumina specimens while the impact pressure between 7GPa-8GPa. From the point of view of phenomena, the recompression signals in terms of free surface particle velocity occurring in alumina ceramics under shock-loaded were similar to those in glass where failure wave has been widely verified.(4)The modified form for the Hugoniot Elastic Limit was given associated with

得到了A95陶瓷采用Drucker-Prager准则修正公式计算的σHEL值，并与实验得到的σHEL值进行了比较；(5)采用ANSYS/LS-DYNA有限元分析软件对冲击压缩下氧化铝陶瓷动态力学性能进行了模拟分析，数值模拟结果与实验结果吻合较好，数值模拟结果表明JH-2材料模型能够较好地模拟陶瓷的物理力学性能。

By analyzing phases velocity profiles and resistance lawv resulted from gas slug in the pipe center,the condition that the secondary flow occurs,phases velocity profiles,formula of drag reduction and a curve of drag reduction have been obtained.

以流体力学基本方程为基础，通过对气体在管道中心形成段塞流的相速度分布和阻力规律分析，得到了二次流发生的条件、各相流体速度分布、减阻率关系式以及减阻率曲线。

For example, all previous theoretical predictions and experimental observations have been questioned by Valanju et,wherein the authors claim that the presence of dispersion prevents power transmitted at RHM-LHM interface from refracting at a negative angle, which means the refraction of group velocity n_g carrying the physics information isall along positive refraction, but "negative refractive material " means only the refraction of phase velocity np is negative.

涉及最多的是负折射现象在物理上的因果率，例如Valanju等人通过一些理论计算认为所谓的"负折射率材料"只是相速的折射率n_p可以是负的，而携带物理信号的群速度的折射率n_g永远是正的，由此引发了许多争议。

Thus when we speak of "the velocity of an automobile," we usually mean its velocity relative to the earth.

因此，当我们谈到"某汽车的速度"时，通常是相对于地面的速度。

Thus wh we speak of "the velocity of an automobile," we usually mean its velocity relative to the earth.

因此，当我们谈到"某汽车的速度"时，通常是相对于地面的速度。

Acoustic correlation velocity measurement technology is used to make measurements of velocity relative to the seabed.

声相关测速技术可以测得舰船相对于海底的绝对速度。

This study measured the isovolumic contraction time , isovolu-mic relaxtion time and ejection time of CCP group and normal contrast group. Late,tei index was calculated, relationship between Tei index and LV function index such as ejection fraction ,the ratio of transmitral peak velocity at early diastole to transmitral peak velocity at late diastole etc.

本研究通过对正常对照组与肺心病病例组使用频谱多普勒超声心动图测量ICT、IRT、ET时间计算Tei指数，观察肺心病左心室Tei指数变化并分析其与超声测定的心功能指标EF、E/A等相关性，探讨Tei指数评价肺心病左心室整体功能的价值。

Comparing with the traditional high velocity oxygen-kerasense flame spraying, the development of the DZ9000E high velocity oxyfuel spraying is emphasizing on reduction of the cost of coatings and removability of in-situ application under various working conditions.

与氧煤油超音速火焰喷涂系统相比，DZ9000E型氧燃气超音速火焰喷涂系统的开发更侧重于降低涂层的成本以及适应不同工况中现场使用的可移动性。

Methods Radionuclide ambulatory renography and color Doppler renal hemodynamics were studied in 30 patients with esential hypertension and left ventricular hypertrophy and 21 healthy control group. The glomerular filtration rate,renal index and the distribution of intrarenal artery were investigated.The resistive index, the systolic peak velocity,andthe low diastolic flow velocity and acceleration time of theintrarenal arterial flow were measured. Results Compared with control group the density of intrarenal artery of patients with esential hypertension and left ventricular hypertrophy were significantly decreased.

对30例高血压伴左室肥厚病人及21例年龄相当的健康人对照组行核素动态肾功能检测及彩色多普勒超声肾血流动力学检查，测定肾小球滤过率和肾脏指数及肾内动脉分布，段动脉、叶间动脉的阻力指数，血流峰速加速时间，收缩期最大血流速度，舒张期末最低血流速度。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。