彩色多普勒示返流及分流束的面积和周长均增加。
The color Doppler jet area and circumference of all jets were also increased.
观察30例显示血流会聚区（FCR）的偏心性二尖瓣返流患者的返流束形态，发现均为附壁细长束。
The shape of regurgitant jets in 30 patients with eccentric mitral regurgitation showing now convergence region (FCR) was observed.
于左心长轴观、心尖或胸骨旁四腔观以及反流束横断面方位显示偏心性反流束的整体形态，评价二尖瓣的反流程度。
Its stereoscopic shape was observed in long views, the apical and parasternal four chamber views of left ventriculum and its regurgitant extent were estimated.
太阳风是一束带电的粒子流。
The solar wind is a stream of electrically-charged particles.
在电子储存环中，由于被束流势阱俘获的离子会引起束流不稳定性。
The ions trapped by beam potential well can cause beam instability in electron storage rings.
不同加速段间的束流匹配是减少束流损失和发射度增长的关键之一。
Beam matching between the different accelerator sections is one of the key points to reduce the beam losses and emittance growth.
然后讨论了影响粒子束传输的各种因素，包括粒子束类型、能量、束流、出口初始束半径以及散角等。
Then, the influences of the beam types, beam energy, beam current, initial radius and divergent angle on the beam propagation are discussed briefly.
模拟和测量结果显示磁场对MIG的束流有影响，MIG的束流也与阴极温度和空间电荷效应有关系。
Simulation and measurement result indicate that magnetic field influence the beam current of MIG, and the beam current of the MIG depends on the cathode temperature and space charge effect.
对含有聚束(脉冲束流)系统的加速器粒子动力学进行模拟是LEADS程序的新特色。
To calculate the accelerator dynamics process to contain the buncher (pulse beam current) system is a new characteristic of LEADS program.
利用数值模拟方法研究了加速场强、注入相位、束团大小、形状、电荷等因素对束流横向发射度产生的影响。
The effect of field strength, initial phase, bunch shape and charge on electron beam transverse emittance is also explored by numeric simulation method.
试验束能提供不同种类、一定动量的单粒子束流。
Test beam provides single particle beam for different experimentation.
为了研究具有任意形状相空间的束流的传输，提出了束流相空间变换的样条函数表述。
In order to study the transport of beams with arbitrary phase space contours, the spline function representation of phase space contours is proposed.
日内瓦时间刚过下午1点，对撞机的操作人员操纵着由数十亿个粒子组成的质子束流，以接近光速的速度实现了首次对撞。
Collider operators steered the proton beams, comprising billions of particles accelerated almost to the speed of light, into their first collision just after 1 p.m. Geneva time.
经过一年多的修整后，质子束流又开始在世界最大的粒子对撞机快速前进了。
Proton beams are zipping around the world's largest particle collider after more than a year of repairs.
“还没有成为一个对撞机”，Gillies补充说，第一批碰撞至少还得等十天，物理学家和工程师将利用这段时间控制束流。
Nor is it a collider - Gillies says that the first collisions will not come for at least ten days, giving physicists and engineers time to practise controlling the beams.
日内瓦时间刚过下午1点，对撞机的操作人员操纵着由数十亿个粒子组成的质子束流，以接近光速的速度实现了首次对撞。
Collider operators steered the proton beams, comprising billions of particles accelerated almost to the speed of light, into their first collision just after 1 p. m. Geneva time.
介绍了一种低功率圆柱形阳极层离子源的工作特性和束流分布特性。
A low power cylindrical anode layer ion source and its working characteristic, and the beam distribution are introduced.
论述了高自旋同质异能态束流的物理意义。
The physical motivations with high spin isomer beams were introduced.
本文采用两种小世界模型和无标度模型构造出了束流输运网络。
We adopt two kinds of small world model and scale free BA model to construct the beam transport network.
粒子运动方程中考虑了空间电荷效应和束流负载效应。
The space charge effect and the beam loading effect are considered in the equation of beam dynamics.
束流轨道稳定性是同步辐射光源的重要性能指标。
The stability of beam orbit is essential to the performance of a synchrotron radiation light source.
本文阐述的步进滚珠丝杠副已应用于北京质子加速器的束流测量系统中。
The stepper ball screw nut has been used in a beam monitor system of Beijing proton synchrotron.
高频离子源管道式引出电极的几何参数对束流引出具有重要影响。
The geometry of the pipe shaped extraction electrode of the RF ion source may strongly affect the extracted ion beam.
在弱束流的条件下，四种离子声波模式中有两种分别对应慢孤波和快孤波。
Under the weak beam conditions, there are four ion acoustic wave modes, of which, two correspond to the slow and fast solitary waves.
在机器研究过程中观察到束流集体不稳定性可以被八极磁场产生的朗道阻尼很好地抑制。
It was observed in machine study that, Landau damping caused by the octupole field can suppress the beam collective instabilities.
采取工程测量控制网，对冷却储存环“S”形束流环的基础、坑道墙，采用全站仪按极坐标法进行高精度定位、测控。
With the engineering survey control network, authors made a high precision orientation, measuring and control to basement, mine gallery wall of CSR beam loop by polar coordinates with total station.
激光束、电子束、离子束三种高能束流技术对材料表面改性是通过改变材料表面的成分或结构实现的。
Surface modification of materials by means of high-energy laser beam, electron beam and ion beam technology are realized through changing composition and structure of the material surface.
激光束、电子束、离子束三种高能束流技术对材料表面改性是通过改变材料表面的成分或结构实现的。
Surface modification of materials by means of high-energy laser beam, electron beam and ion beam technology are realized through changing composition and structure of the material surface.
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