restricted opening

Some numerical examples are presented with the full and limited aperture far-field data.

对全孔径和有限孔径远场数据的数值结果表明 ,在波数较小的情况 ,这一方法既是有效又是实用

A light beam diffracted from a finite aperture (this case corresponds to the acoustic field radiated from an ideally baffled planar transducer in acoustics) is generally described by a two dimensional integral, the Rayleigh Sommerfeld integral formula.

给出了有限孔径Bessel、Bessel Gauss和Gaussian波束的一种简单的解析描述 。

Numerical Solution of the Limited Aperture Problem in Three-Dimensional Inverse Acoustic Scattering

三维有限孔径逆声散射问题的数值解

Finite Element Analysis on Hole Radius of Circular-Web Opening Steel Beams

圆形开孔梁中开孔半径的有限元分析

Analysis of the Mylonite Crystal Porous Mold of Mixed Radius by the Finite Element Method;

糜棱岩原岩混合粒径多孔介质模型有限元分析

Three-dimensional Non-linear Finite Element Analysis of the Pile-Group Effect for Large-diameter and Super-long Pile-Group Foundation;

大直径超长钻孔灌注桩群桩效应的三维非线性有限元分析

Finite Element Simulation and Analysis of Small Compression of Foam Aluminum Based on the Statistical Hole-diameter

基于统计孔径的泡沫铝小变形压缩的有限元模拟分析

guide twist drill

有导径的深孔麻花钻

testing method for apparent opening size of geotextiles

土工布有效孔径测定法

effect of finite Larmor radii

有限拉莫尔半径效应

Study of computational method for ultimate shaft resistance of large-diameter bored cast-in-situ pile

大直径钻孔灌注桩极限侧阻力计算方法研究

Finite element simulation of fatigue crack growth of MSD with multiple collinear holes on finite plate

有限板共线多孔MSD疲劳裂纹扩展有限元模拟

Nonlinear finite element analysis on stress concentration in width-limited plate with hole based on ANSYS

有限板宽孔边应力集中的非线性有限元分析

Finite Element Analysis on SIF of a Number of Collinear Holes on MSD Finite Plate

有限板共线多孔MSD应力强度因子有限元分析

FEM for a type drilling-perforating casing with screw holding in open hole completion

裸眼完井螺旋钻孔-射孔套管的有限元分析

There is a pin hole between outside shell and output axis.

外套与输出轴的径向有一个插销孔。

a compound camera lens with a relatively high aperture.

带有相对高孔径的照相机复合镜头。

a short musket of wide bore with a flared muzzle.

一种短式的宽口径的具有散孔的步枪。

Preparation and Properties Research of Pore-Size Controllable Carbon Membrane;

具有可控孔径的炭膜制备与性能研究

Research on Techniques of Synthetic Aperture Side-scan Bathymetric System

合成孔径侧扫测深系统有关技术研究