这是一个最终从战场归来的士兵的故事。他从旧金山打电话给他的父母：...

Stepped frequency radar is a well known scheme to generate high range resolution profile(HRRP) of targets. Through appro......

Hydraulic performances of skimming flow over stepped spillway was studied by means of hydraulic model experiment. The s......

看图写话，即看图作文，应遵循“三步走”。下面就一题例进行说明：　　根据上面四幅图画写一篇100字左右的短文。　　 第一步：（在确定人称......

WHILE about US $44 billion worth of economic stimulus capital and other encouraging funds have been input into the devel......

One day a traveling salesman was driving down a country road at about 30 mph when he noticed that there was a three-legg......

A stepped-section ring consists of two rectangular section rings,a big ring and a small ring,joined together.This kind o......

Ground penetrating radar (GPR) is an impactful detection method of buried targets developed in these decades and has bee......

Mechanical micro-vibration of a target may induce phase modulations on the radar echo,and the vibration can be detected ......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......