会聚区

深海声道中声传播会聚区研究

A Research of Sound Propagation Convergence Zones in Deep Ocean

穿越深海会聚区的声源定位方法研究

Source localization traversing convergence zones

在小脑CrⅠCrⅡp区城内，有三叉神经和迷走神经一级传入纤维的会聚区。

There was a convergence of the trigeminal and vagal primary afferent fibers in the cerebellar crura ⅱ and cerebellar crura ⅰ .

本文对23例单纯膜部室间隔缺损患者，通过校正左室流出道血流对会聚区的影响，计算出校正后的分流率Fc，并根据Fc计算出校正后的缺损口面积Ac。

The corrected shunt flow rate ( Fc ) and defect orifice area ( Ac ) were calculated in 23 patients with simple membranous ventricular septal defect through correcting the effect of left ventricular outflow on flow convergence region .

水下声道中的反转点会聚区（Ⅰ）简正波理论

Turning-point CONVERGENCE-ZONES in underwater sound channel ( I ) a normal-mode theory

射线声学法在会聚区调查中的应用研究

Application Research of Ray Acoustics in Convergence Zone Survey

深海会聚区中求解目标运动要素的机动方法

The motivating method of calculating target moving factor in deep sea convergence zone

血流会聚区大小与返流束大小评估二尖瓣返流程度的对比研究

Comparative Study of Flow Convergence Region and Jet Sizes on Evaluation of Mitral Regurgitation

南海深海声道中反转点会聚区的实验研究

An experimental investigation of turning-point CONVERGENCE-ZONES in a deep sound channel in the South China Sea

左室流出道血流对室间隔缺损左室面血流会聚区影响的研究

Effect of Left Ventricular Outflow on Flow Convergence Region on the Left Septal Surface in Ventricular Septal Defect

会聚区调查是海洋声传播损失调查的一项重要内容，在调查前大致了解海区中的会聚区分布情况，将给会聚区调查带来极大的便利。

If the distribution of convergence zone in the sea area is known roughly in advance , it will be very helpful for convergence zone survey .

中尺度涡旋和海洋锋面引起声速剖面的水平非均匀性变化，并进一步引起会聚区结构特性的改变和表面声道效应的出现或者消失。

The range-dependent variation of sound velocity resulted by mesoscale eddy and oceanfront can cause the changing of convergence zone structure and the emergence or disappearance of surface duct .

该研究表明通过校正左室流出道血流对会聚区的影响计算出的分流率能更准确地评估室间隔缺损的分流程度。

The study concluded that Fc calculated by correcting the effect of left ventricular outflow on flow convergence region can more accurately evaluate the shunt severity of ventricular septal defect .

针对深海会聚区调查，提出了一种利用射线声学法对会聚区进行预估，从而大大提高了工作效率，降低了调查成本，保证了调查数据的质量。

A method basing on ray acoustics to predict the distribution of convergence zone is given , which could increase efficiency greatly , reduce survey cost and guarantee the quality of survey data .

为了探讨彩色多普勒对二尖瓣返流程度更为准确、快捷的评估方法，我们对30例二尖瓣关闭不全患者进行了血流会聚区大小及返流束大小判断二尖瓣返流的对比研究。

To seek a quick and accurate color Doppler method estimating the mitral regurgitant grade , a comparative study of flow convergence region and jet sizes on evaluation of mitral regurgitation was performed in 30 patients with mitral insufficiency .

结果发现：33／52（63%）例生理性二尖瓣返流和87／87（100%）例病理性二尖瓣返流可于二尖瓣左室面显示血流会聚区；

Flow convergence region , which was located in the left ventricular sides of mitral valve , was displayed in 63 % ( 33 / 52 ) of physiological MR and 100 % ( 87 / 87 ) of pathological MR.

分析了潜艇被动声纳在存在会聚区条件下的远程探测能力，探讨了单站纯方位目标定位的方法和被动声纳引导下导弹攻击的实现问题。

The long distance detecting capability of passive sonar of submarine under the condition of sound acoustic convergence is analyzed . The pure bearing method by use of single submarine locating target position , and the missile attack based on passive sonar conduction are discussed .