By modeling of " y " - shaped junction of the compound river channel with an intersection angle 90 , the flow velocity and water level at the junction were obtained by use of the acoustic doppler velocimeter ( adv ) and point gauges 摘要通過(guò)制作交匯角為90的復(fù)式斷面河道" y "型交匯河口模型,利用三維聲學(xué)多普勒流速儀( adv )和測(cè)針獲取流速及水位數(shù)據(jù),對(duì)支流河口處的水流流態(tài)包括水面形態(tài)、水流流速和水流分區(qū)進(jìn)行分析。
The main contributions are as follows : first , geometry algorithm for determining position with two satellites is studied . three parameters including intersection angle , pitching angle and visual angle are selected to describe the geometric relationship of observation intersection 其主要研究?jī)?nèi)容包括:推導(dǎo)了雙星定位的幾何方法;根據(jù)目標(biāo)和兩顆衛(wèi)星的空間位置關(guān)系,設(shè)定了三個(gè)角度參數(shù)來(lái)描述雙星定位的精確度。