Flap complications after laser in situ keratomileusis:clinical changes and treatment;
准分子激光原位角膜磨镶术后与瓣相关并发症及处理
Analysis of tensile strength of flapper teeth of valvular cardan shaft;
瓣形万向轴瓣齿的拉伸强度分析
Numerical study of k-ε turbulent models for flow within a straightly lobed nozzle;
直排波瓣喷管引射器流场计算k-ε模型的选择
In this paper, a numerical procedure to study the mixing flow in a circularly lobed nozzle is presented.
采用贴体曲线坐标、SIMPLEC算法和完全压力修正 ,在非正交性非常大的结构型同位网格上求解了圆排波瓣喷管引射器内流场的不可压Navier Stokes方程 ,湍流采用标准k ε涡黏模型 。
For the purpose of infrared stealth, the lobe and bend exhaust nozzle is required for the turbo shaft engine to eject surrounding cooling air and to change the direction of exhaust jets.
将圆排波瓣喷管配以不同的弯曲混合管组成引射混合器 ,实验研究了弯曲混合管的几何参数 ,试验结果表明 :当弯曲角β=40°时 ,弯曲混合管的引射流量比φ与同样直径的圆柱混合管相当 ;当β>40°时 ,弯曲混合管的引射流量比φ相比于同样直径的圆柱混合管有较大的下降 ,φ随β的增加下降很快 ;φ随混合管截面比λ的增加先增大后下降 ,虽然峰值小于圆柱混合管的最大引射流量比 ,但是峰值对应的值却近似等同于圆柱混合管的截面比 ;φ随次流进口截面比 σ的增加而接近线性增大。
Calculates the random variable of side lobe clutter using correlation matrix.
采用了相关矩阵法,计算大量旁瓣杂波随机变量,使PD雷达导引头天线输出的和差信号的计算大大简化,在导弹攻击低空目标的数字仿真中,可使仿真时间缩短至原来的十五分之一左右。
The side lobe levels of the seismic section from pseudorandom coded vibrator signal are obviously lower than those from Chirp sweeping vibrator signal.
常规的可控震源Chirp扫描信号的地震响应存在着相关信号旁瓣大、分辨率低的缺点。
Based on uniform line array,the sonar equation of active sonar beam main lobe and side lobe interfered by noise-jammer are presented.
研究了噪声干扰器对鱼雷主动声呐的对抗原理,以等间隔直线阵为例,分别给出了干扰器对鱼雷主动声呐主瓣和旁瓣的干扰方程。