半波长

采用非等距稀疏直线阵，阵元之间的间距任意，不受半波长的限制。

As an unequal and sparse line array , its space is arbitrary and not restricted by half-wavelength .

基于力电类比方法，对压电超声换能器设计理论进行了分析，得到半波长压电超声换能器的设计尺寸计算公式。

Based on Force and Electric Analog Method , the PZT ultrasonic transducer is analyzed and the formulations for size calculation are obtained according the half-wavelength principle .

~4He~+在Al和Si单晶晶面沟道中的半波长及阻止本领

Half wavelength and stopping power for planar channeled ~ 4he ~ + ions in Al and Si crystals

通过选择合适的结构参数，SPPs的光斑大小可限制在半波长以下。

By properly choosing the geometric parameters , SPPs spot can be confined to very small size below half of the wavelength .

当压电陶瓷驱动位移大于半波长时，均方根误差为5nm。

The accuracy is 5 nm when the displacement drived by PZT exceeds a half wavelength of the light .

用具有不同机电耦合系数、厚度为半波长的交替排列多层氧化锌薄膜制成了中心频率为8GHz的声体波微波延迟线。

The microwave bulk acoustic delay lines with centre frequency of 8 GHz were fabricated using a multilayer structure consisting of alternative half wave thick layer of ZnO films with different electro mechanical coupling factors .

基于一维振动理论，设计了体积小（长130mm）、重量轻（1.6kg）、转动惯量小的半波长振动系统。

Based on one dimensional vibration theory , a half wave vibration system which has advantages such as compact size ( 130 mm long ), light weight ( 1.6 kg ) and small moment of inertia is designed .

半波长余弦形超声聚能器

A longitudinal ultrasonic horn of the half-wavelength cosine type

超声振动钻孔半波长振动系统的设计

Design of a half-wave vibration system for ultrasonic drilling

适合于微孔加工的半波长超声振动系统研究

Study on half-wave ultrasonic vibration system suitable for micropore

一种半波长开环谐振器带通滤波器的设计

Design of a Bandpass Filter using Open-Loop Resonator

相位控制的运动原子亚半波长局域化研究

Phase Controlling Sub-half-wavelength Localization of Moving Atom

另一种方法是用优化方法求得屈曲半波长及其相应的屈曲临界值。

The other method is to get half wave length and related critical buckling value with optimization .

连着在中心的波导线的由两个棒组成的半波长天线。

An aerial half a wavelength long consisting of two rods connected to a transmission line at the center .

研究振动幅度小于激光半波长的微小振动的测量方法。

A method of measuring small vibration with an amplitude lower than half that of the wavelength of laser is developed .

该复合换能器由夹心式纵向振动半波长换能器及弯曲振动的薄圆盘组成。

The compound transducer is composed of the sandwich vibrator in longitudinal vibration and the circular thin plate in flexural vibration .

近破波一般是指在堤前半波长以内破碎的波浪。

According to the author 's definition the breaking point of breaking wave is usually smaller than half the wavelength to the breakwater .

正负折射率绝对值不等时，得出介质厚度为半波长时透射波出现在中心波长处；

Transmission wave was studied by characteristic matrix for different patterns and different media thicknesses when the refractive index absolute value is equal .

应用中心差分方法计算了半波长振子天线的相关电参数，所得结果与文献结果具有较好的一致性。

The relative electric parameters of half-wave dipole are calculated using the central difference method , and-the results perfectly accord with the references .

该装置主要由超声波发生器、半波长声学系统、旋转关节以及工具系统四大组件构成。

The device includes four modules , which are ultrasonic generator , half wave vibration system , rotary joint subassembly and tool system .

当阵元间距超过超声波的半波长时，将导致阵列计算时出现信号角度模糊问题和测向伪谱峰，因此研究超声稀疏阵列下的变压器局部放电定位具有重要的理论和实际意义。

When the array element spacing is more than half the ultrasonic wavelength , the problems of angle ambiguity and false peaks occurs during array calculation .

在较低频段（VHF/UHF），传统的半波长微带天线尺寸仍然太大。

In VHF / UHF ( Very High Frequency / Ultra High Frequency ) , the standard microstrip antennas of half-wave length are still very big .

与传统的直接耦合半波长谐振腔型带通滤波器相比，这种滤波器带外抑制度高，阻带宽，特别是其尺寸缩短了近40%。

The filter has not only wider stop band but also decreased dimension ( approximately 40 % shorter ) comparing with traditional direct-coupled half wave resonator ones .

通过放大，在结构外表面八个像点两两之间的距离都大于半波长。

Through magnification , the imaging distances between the nearest-neighbor point sources on the output surfaces of the structure are all larger than half of the wavelength .

灵敏度上限也不受探测超声波半波长的限制，限制系统检测灵敏度的决定因素是噪声水平。

And the up limit sensitivity is not bounded by the half of a wavelength of probing ultrasound . Noise level is the key factor to determine sensitivity .

按照耐奎斯特空间采样定理，阵元间距超过半波长将会带来方位估计的周期性模糊。

Extending the uniform intersensor spacing beyond a half-wavelength would lead to a set of cyclically ambiguous direction-of-arrival estimates , in accordance with the spatial Nyquist sampling theorem .

当两测点在入射波方向上的投影距离为入射波半波长的倍数时，该方法会出现奇异问题。

When the projecting distances of two gauges on the incident wave direction equal half of the incident wave lengths or time it , there will be a singular problem .

在此基础上，给出了矩形薄板发生塑性动力屈曲的必要条件，确定了矩形薄板塑性动力屈曲的临界半波长和临界冲击值。

The necessary condition for dynamic plastic buckling of rectangular plates is given and the critical half-wave lengths as well as the critical impact values of the plate are determined .

本文提出了一种运动原子亚半波长局域化方案。该方案是基于四能级双人原子系统中相位依赖的电磁诱导透明现象。

In this article , we present a scheme of sub-half-wavelength localization of moving atoms , basing on the phase-dependent electromagnetically induced transparency in a four-level system in the double-A configuration .

具体的措施有：使相邻两个直角弯头间的直管长度尽量接近主要脉动压力波半波长的偶数倍；在管道中安装容腔等。

Specific measures include : straight pipe length between two adjacent elbow angles has better be multiple of wave length , installing capacity in the pipe and so on . 3 .