超声

Dimensiona ultrasonography data of 29 cases fetal anomaly between 24 and 40 weeks' gestation from Jan 2003 to Dec 2006. Results Among them, there were 11 cases of cheilognathus,7 cases of anencephalus, 4 cases of anomaly of extremities, 3 cases of omphalocele, 3 cases of lymphocyst at the neck and 1 case of amniotic band syndrome. The anomaly features are consistent with those of the born fetuses. Conclusion The three??

大部分解剖结构明显异常的畸形一般通过二维实时超声在22周左右即可做出诊断［1］，但胎儿体表结构有较复杂的曲面改变，二维超声可能漏诊、误诊胎儿体表畸形。20世纪80年代末应用于临床的三维超声成像，是检测胎儿发育状况的有效方法，大大提高了产前诊断的准确率，尤其在检测胎儿畸形方面具有独特优势［2］。

Clinical practice has proved that ultrasonic examination is the first reference to diagnose biliary duct ascariasis and this disease has complicated manifestations on ultrasonic figures.

超声检查是临床诊断胆管蛔虫症的首选方法，胆管蛔虫症在超声图像上的表现复杂样，正确认识胆管蛔虫症的声像特征，才能好地发挥超声检查对本病的诊断价值。

To this end, the ultrasound cardiograph is filtered and fuzzily boundary enhanced, a threshold is set to obtain a binary image, then the heart's boundary is got through ellipse curve fitting, cubic spline interpretation and smoothing.

首先对超声心动图像进行滤波以消除图像中的噪声，并运用模糊数学理论进行模糊边缘增强，提取超声心动图像的内外膜边缘信息；接著对超声心动图像作二值化处理和椭圆曲线拟合，初步得到心脏的内外膜边缘；再采用相应的三次样条插值和平滑技术，得到光滑、连续的心脏内外膜边缘。

In this study, a three-factor and four-level orthogonal experiment was designed to study the biologic effect of ultrasonic radiation on Marine Chlorella.

设计了一个超声频率、超声功率和辐射时间三因素四水平的正交实验，研究超声辐射对海水小球藻的生物效应。

Objective: To discuss the influences of the concentrations of sodium cholate, cholesterol and drug, preparation temperature, ultrasonic time and power on the particle size and encapsulation efficiency of Flos Magnoliae volatile oil nano-liposome through film-ultrasonic wave technique together with membrane filter method.

目的：采用薄膜分散-超声-膜过滤法制备辛夷挥发油纳米脂质体，考察胆酸钠、胆固醇、药物浓度、超声功率和超声时间等因素对辛夷挥发油纳米脂质体粒径及包封率的影响，并对纳米脂质体的形貌、稳定性进行分析。

The invention discloses a ternary alloy hyperacoustic motor frictional material of the fire resistance resin modified polyphenyl ester, which solves the low friction coefficient problem, the low impact strength problem, the low abradability problem and the bad processability problem of the prior hyperacoustic motor.

耐高温树脂改性聚苯酯三元合金超声马达摩擦材料，它涉及一种聚苯酯基超声马达的摩擦材料。本发明解决了现有超声马达摩擦材料存在摩擦系数小、冲击强度低、耐磨性能达不到要求，以及加工性能差等缺点。

Twelve of all the 14 cases were diagnosed correctively by conventional abdominal sonography and sonography after oral water ingestion. The corrective rate was 85.7%.

通过常规腹部超声及饮水后超声检查，12例十二指肠肿瘤获得了正确的观察定位诊断，超声诊断正确率为85.7%12/14）。

Results revealed that the large side insulation of the stator bar in slot is available for ultrasonic pulse-echo testing; Coupling transducer on the surface of a practical stator bar could minimize the influence on the measurements of velocity, contributing no destructivity of the ultrasonic testing for stator insulation; The simultaneity of same velocity and higher attenuation can be used to detect insulation delamination from conductors; Compared with the wide sides of the bars in slot, the short sides of the bars near the exit from slot and the end bars had a same velocity and a higher attenuation; The velocity might be exactly measured on the shot sides of the bars near the exit from slot and the end bars, while the attenuation might not, which were examined though filed tests; V min decreased greatly and V av decreased slightly with the service time of the bars.

在实验室对线棒多种结构处的主绝缘和不同运行年数(未老化、16、18 和23年)线棒的主绝缘进行了低频超声反射法检测试验，并进行了现场试验，发现(参见 Hao et al， IEEE DEI， to be published)，槽部线棒的宽面绝缘不受换位绝缘的影响，比窄面绝缘更适合超声测量；线棒表面平滑的半导体层减小了耦合剂对超声测量的影响，实现了无损性；波速不变而声衰减减小可以检测线棒出现绝缘与导体脱壳缺陷；出槽口和端部线棒的窄面绝缘与槽部线棒的宽面绝缘相比，声衰减大而波速一致；现场试验验证了波速不受绝缘结构和现场测试条件的影响，而声衰减受以上因素影响很大(参见 Hao et al，中国电机工程学报， Vol.23 No.4)； V min 随运行年数明显减小， V av 随运行年数慢慢越小。

The effects of ultrasonic irradiation on extrusion processing of polypropylene, PP/ethylene-propylene-diene monomer terpolymer blends and crystallization behavior of PP in different PP/nucleators system are studied.

本文利用超声-挤出装置和静态超声辐照装置，研究了挤出过程中超声作用对PP，PP/EPDM体系的流变行为，结构与性能的影响以及PP、PP/成核剂NaBz、MHS、NC-4、TM-1、Talc、Talc(KH及Mica体系在超声辐照作用下结晶行为的变化。

The intensity of the ultrasonic wave will increase when the ultrasonic wave is focused by the sound lens in rock stratum.

然而 ，这种方法要受到两个因素的制约：一是增大超声换能器的功率，必然要增大超声换能器的尺寸，这在本身尺寸就很小的油井中是有一定限度的；二是当超声换能器辐射出的超声波的强度过大时，在超声换能器的周围要发生强烈的空化现象，产生大量的气泡，这些气泡将对超声波产生强烈的散射作用，导致超声波的衰减，反而降低超声波在岩层中的传播距离[1] 。

I think he's learned how to approach hitters....

Johhny Damon说，『他已是最好的了，再没有人能够比他做的更好，我想他的球技已经完全成熟了，而且他也已经学会了如何去对付和压迫各种打击者。。。。。。

In effect, an 18 foot King Cobra could actually look down onto the average human being.

际上，一个18尺眼镜蛇王其实可以俯视到的平均人。