A system configuration of helicopter simulation is given and a mathematical model of helicopter hovering is set up as to development helicopter simulating system in Marinesearch and rescue simulator.
为了研制海上搜救模拟器的直升机模拟系统，给出了直升机模拟的系统结构，建立了直升机的悬停数学模型。
2
Objective:To search for bioactive compounds from marine microbes.
目的：从海洋微生物中寻找天然活性物质。
3
The marine energy saving have several measures. Marine hybrid-drive is one of potential re- search problem.