beam n. 1.梁,栋梁,桁条;(船的)横梁。 2.船幅;(动物、人的)体幅。 3.(秤)杆,杠杆,(织机的)卷轴,经轴;(鹿角的)主干;车辕;犁柄;锄把。 4.(光线的)束,道,柱;【物理学】波束,射束。 5.(笑容、表情等的)焕现。 6.【无线电】有效播听范围。 7.【航空】信号电波,指向电波。 a beam of light 一束光线。 the common beam 标准秤;准则。 beam and scales 天平。 a beam of delight 高兴的表情,笑逐颜开。 an erector beam 【火箭】(发射时调整导弹位置的)千斤顶。 radio beam 无线电领航信号。 a landing beam 【航空】降落指示波。 abaft the beam = before the beam. a beam in one's eye 自己本身的大缺点〔与他人目中之刺相比,自己眼中有梁,源出《圣经》马太福音〕。 before the beam 【航海】正横前。 broad in the beam 〔口语〕臀部阔大。 fly the beam 【航空】按指向电波飞行。 fly the wet beam 【航空】顺着河流飞行。 kick [strike] the beam 1. (秤一方)翘起;过轻,不足抗衡,无足轻重。 2. 输,遭受失败。 off the beam 脱离航向,不顺利;不对头;做错。 on the beam 1. 【航海】与龙骨垂直地,正横地。 2. 在航向上;对头,做对。 on the port [larboard] beam 【航海】左舷正横前。 on the starboard beam 【航海】右舷正横前。 on the weather beam 【航海】迎着正横风。 ride the beam = fly the beam. vi. 1.辐射,发光,闪光。 2.微笑,眉开眼笑。 vt. 1.发射(光线、电波)。 2.向…放[播]送。 3.(用雷达)探测。 4.(用波束)导航(飞机等)。 beam the program at America 向美国播送节目。 the sun beaming overhead 红日当头照。 beam upon 看着…微笑。 beam with joy 眉飞色舞,笑逐颜开。
Application of metastable helium atomic beam in nanostructures fabrication 亚稳态氦原子束在纳米结构制作中的应用
Atomic beam resonance 原子束共振
Atomic beam technique 原子束技术
The evaluation of measurement uncertainty for the cesium atomic beam frequency standard 铯束原子频率标准装置测量不确定度的分析
Atomic beam device 原子束设备
Moreover , we propose some atom - optical elements based on the vccc , such as atomic funnel , atomic beam splitter and atomic interferometer . in the scheme of the uccc 最后,利用v -型载流导体构建了多种原子光学器件,例如原子漏斗,原子分束器和原子干涉仪等。
In the case of single - channel magnetic guiding , we calculate the relationship between the guiding efficiency and electric current or the transverse temperature of atomic beam . we also propose several atom - optical elements base on the uccc 本文也计算了单通道磁导引情况下,原子导引效率和电流、原子束横向温度之间的关系,并采用u -型载流导体构建了多种原子光学器件。
Various schemes of atomic guiding are classified and some applications of atom - guiding technology are introduced . we also introduce atomic beam splitter in details , which is one of important elements of atom optics 本文就各种不同的原子激光导引和磁导引方案进行了分类与综述,并就中性原子导引技术的应用及原子光学的重要元器件之一“原子分束器”作了较为详细的介绍。
When the beam waist wy of blue - detuned segb along the y direction is 10 mm , and its wx is decreased from 10 mm to 1mm , the absolute diffracted intensity from the segb surface will be 10 times of that from the sgb surface , which can be used to reflect an incident atomic beam with a higher normal velocity 因此,当椭圆高斯光束的w _ y = 10mm ,而w _ xw从10mn减小到1mm ,半束兰失谐椭圆高斯光束反射面的衍射光强将比同样参数条件下的sgb反射面的衍射光强提高了10倍。
We propose a novel controllable atomic beam - spiller based on the uccc and discuss the splitting mechanism of the guided atomic beam in the beam splitter from two aspects of the magnetic - field distribution and the trace of the guiding centers . the splitting ratio of the beam splitter can be adjusted by adding a homogeneous bias magnetic field along the y - direction , and the relationship between the splitting ratio and the additional bias field is analyzed 本文提出了一种采用在y方向上加一偏置磁场来实现分束比可控的新颖原子分束器,并从磁场分布和导引中心轨迹两个方面,详细分析和讨论了基于u -型载流导体所构建的原子分束器的分束机制。