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 摘要通過制作交匯角為90的復式斷面河道" y "型交匯河口模型,利用三維聲學多普勒流速儀( adv )和測針獲取流速及水位數據,對支流河口處的水流流態包括水面形態、水流流速和水流分區進行分析。
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 其主要研究內容包括:推導了雙星定位的幾何方法;根據目標和兩顆衛星的空間位置關系,設定了三個角度參數來描述雙星定位的精確度。