目的探讨低机械指数实时超声造影在肝移植术后门静脉并发症诊断中的价值。
Objective To study the value of real time contrast-enhanced ultrasonography in the diagnosis of portal vein complications after liver transplantation.
超声的此种特性，与超声的照射条件，如机械指数、脉冲重复频率、照射时间等有关。
Ultrasound-assisted gene delivery is associated with the parameters of ultrasound exposure, such as mechanical index, pulse repetition frequency, time of exposure, and so on.
结果低机械指数谐波超声造影对恶性病变诊断的的敏感性、特异性和准确性分别为96%、90.7%和93.8%。
Results The sensitivity, specificity and accuracy of diagnosing malignant liver tumors by contrast-enhanced harmonic ultrasonography with low mechanical index were 96%? 90.7%? 93.8% respectively.
结论高机械指数的体表超声辅以高剂量超声造影剂在经颅脑超声造影中可导致血脑屏障通透性增加，但在造影检查后，这种改变可自行恢复。
Conclusions the combine use of the high MI ultrasound and the high dosage of the ultrasound contrast agent can enhance the permeability of the BBB, but this change is reversible.
用机械的指数来替代这一成功的合作过程，将是愚蠢的。
It would be foolish to replace this successful partnership process with a mere mechanical index.
农业排灌机械动力和粮食收购价格指数与粮食生产呈负相关。
Farm irrigation and drainage mechanical power and grain purchasing price index have negative correlation to grain production.
目的：探讨浅快呼吸指数（RVR）和气道闭合压对机械通气患者撤机的指导意义。
Objective:To evaluate the significance of rapidshallowbreathing index(RVR), and airway occlusion pressure as weaning predictors in mechanically ventilated patients.
SDI测试中水样流速随时间按指数规律衰减，机械堵塞是滤膜的主要堵塞污染过程。
The flow rate of water sample in SDI test decays with time exponentially. The mechanical block is the main blockage process of membrane fouling.
在机械手实例中，分别采用复指数变换法和坐标矩阵变换法进行求解。
Both complex exponential form transformation and the coordinate matrix transformation are applied to the example of manipulator.
采用两层涡粘性模型和速度剖面的指数律导出机械能方程的耗散积分解析表示式。
An analytical expression of dissipation integral for kinetic energy integral equation is derived by two-layer eddy viscosity turbulence model and the power law of the velocity profile.
并用扫描电镜、热分析、氧指数和机械性能测定等方法研究了HB—1对酸酐固化的环氧树脂性能的影响。
It's influence on the properties of anhydride cured epoxy resin was studied by scanning electron microscope, heat analysis, limiting oxygen index determination and other methods.
本文提出了一种运用指数积公式和凯恩方程对 水下机器人机械手系统进行了动力学建模 的新方法。
The virtual prototype for interfacing apparatus of DSRV has been built and the interfacing process has been done in this paper.
本文提出了一种运用指数积公式和凯恩方程对 水下机器人机械手系统进行了动力学建模 的新方法。
The virtual prototype for interfacing apparatus of DSRV has been built and the interfacing process has been done in this paper.
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