回声

Some reports show that the feature of ECUS of HCC is very typical, which is fast enhancement during the arterial phase and fade away during the portal venous phase and low echo in the delayed phase. This situation is called "fast in fast out".

研究表明，原发性肝癌超声造影表现上具有特征性，主要以动脉相快速整体型增强为主，持续时间较短，在门脉期即呈低回声改变，总体呈现&快进快出&的改变。

Methods To observe the common carotid artery and its bifurcation, the internal carotid artery, external carotid artery intima-media thickness, plaque echo and hemodynamic changes.

方法观察颈总动脉及其分叉处、颈内动脉、颈外动脉内中膜厚度、斑块回声及血流动力学改变。

Objective To evaluate the effects of simvastatin on the vascular elasticitv in fat-fed rabbits by echo-trackingtechnique.

目的 探讨血管回声跟踪技术评价辛伐他汀干预高脂喂养兔血管弹性的效果。

humans history of science development as it were a history of learning from other being.from bat to echo locator,from leaves array to sydney opera house,all of these outcome are coming from creature.bees build hexagonal honeycomb to use space as fully as possible ,which is very scientific.ants can build complex hole to feed babies,transport and store 美容 in small and limited space.by researching honeycomb and ant city,the city plot sign can make use of 食品 conclusion.

人类的科技发展史可以说是一部向其他物种不断学习模拟的历史。从蝙蝠到回声定位仪、从鸟类到波音747、从树叶的排列到悉尼歌剧院，无疑不是向生物学习的结果。蜂巢是通过六边形的蜂房来实现了对空间的最大利用，毫不浪费（因为圆形总是会有空隙，而方形又不节省材料，所以介于它们之间的形状充分综合了二者的优势）。蚂蚁穴是庞大的蚂蚁群在极小的空间中构筑的复杂巢穴，能满足其哺育后代，运输贮存食物等功能，并且是井井有条。

This article proposed one kind of improvement algorithm in this foundation, this algorithm has defined a filter balance factor formula, according to this formula, we readjustment filter balance factor value appropriately, through controlsling the LMS filter coefficient's freezing and the restoration, we solute echo puzzle perfectly; In the telephone condition examination algorithm aspect, in view of the busy signal examination algorithm which has has only been able to examine the busy signal, but cannot examine the dial tone, hang the staccato the deficiency, this article improves its algorithm to enable it to apply these aspects, make it can be better used in the actual system application.

本文在此基础上提出了一种改进算法，该算法定义了一个滤波器平衡因子的计算公式，根据此公式，适当调整滤波器平衡因子的阀值，通过控制LMS滤波器系数的冻结和恢复，很好的解决了回声的困扰；在话机状态检测算法方面，本文针对已有的忙音检测算法只能检测忙音，而不能检测拨号音、挂断音的不足之处，研究改进其算法使之能够应用到这些方面，更好的为实际系统的应用服务。

However, relative very few studies has done about how did the IC neurons of mouse respond to frequency-modulated sweeps.

在其他动物如回声定位蝙蝠、大鼠等下丘已有初步研究，并发现很多神经元都能够对这类复杂声有效编码。

I pre-June 24 came to 月经, 7 next month, August 3 to go to the hospital urine test was negative in the August 5 negative home test paper, test August 7 found positive, August 16 so the doctor's advice to go to the hospital super-b, progesterone capsule 14mm × 9mm, no germ tube and the original heart throb, August 26 to check once again to go to the hospital, doctors do blood tests so that the normal, the doctor September 16 proposed to do super-b, August 30 due to early detection of brown discharge, I am afraid of blood, on the rush to the hospital, the doctor let me do a b-chiu, a progestin intrauterine sac visible echo progesterone capsule 14mm × 22mm × 16mm, ring integrity, and no germ.

我前期6月24日来到月经，7月份未来，8月3日去医院尿检为阴性，8月5日在家用试纸测试为阴性，8月7日测试发现为阳性，8月16日去医院医生建议做b超，孕囊14mm×9mm，未见胚芽及原始心管搏动，8月26日再次去医院检查，医生让做血检查结果正常，医生建议9月16日再做b超，因8月30日早发现褐色分泌物，我担心是血，就赶紧去了医院，医生让我在做了一次b超，子宫腔内可见一孕囊回声，孕囊14mm×22mm×16mm，光环完整，未见胚芽。

Although this first version can not work as good as those from GIPS yet, we have confidence to improve it in later software versions.

虽然这个第一版的声学回声抵消效果还不能跟GIPS的相比，好在我们有信心在以后的版本中不断改进它。

Fans standing in front of the stage shouted out "Gor Gor", we echoed from our corner.

在～之前阶段站立的狂热者大叫&Gor Gor&，我们从我们的角落发回声。

They began with a brisk version of "Good Times, Bad Times," with Page's guitar crisp and clear but Plant's voice cramped by feedback.

他们以轻快的&Good Times， Bad Times&开场，Page吉他弹奏的清脆干爽但是Plant的声音却被麦克的回声干扰的含混不清。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐