排序方式： 共有6条查询结果，搜索用时 187 毫秒
1
1.
2.
Aimee E. Miller-Ott 《Communication Research Reports》2016,33(2):173-176
The present study examined the influence of helicopter parenting and family conversation and conformity orientations on college students’ out-of-class communication (OCC) with instructors. Data from 272 college students revealed significant negative relationships between helicopter parenting and conformity orientations and students’ reported OCC and a positive relationship between conversation orientation and OCC. 相似文献
3.
直升机噪声预测是直升机噪声研究的主要目标之一。文章根据谐波法发展了一种能预测直升机飞越噪声的计算模型。将旋翼自由尾迹分析法所得到的旋翼和尾桨的气动载荷数据代入该模型中,分别计算直升机在悬停和前飞时的有效感觉噪声级,并对其计算结果进行分析。 相似文献
4.
In this paper, an intelligent self-repairing control scheme is proposed for a class of nonlinear MIMO system. A direct self-repairing controller of a nonlinear SISO system is firstly designed, and then the control scheme is promoted to a nonlinear MIMO system. The error signals are replaced by the state variables to deal with the high derivate problems of the desired signals and a nonlinear regulating function is brought in to improve the performances of the sliding mode. The self-repairing controller is made up of four parts: the nonlinear regulator, the equal controller, the compensator I and the compensator II. The control method is applied to a helicopter flight control system with loss-in-effectiveness faults. Some simulation results illustrate the effectiveness and feasibility of the proposed control scheme in the paper. 相似文献
5.
首先介绍当今世界舰载直升机的发展概况和在现代海战中的作用,阐述旋翼型飞机特点及基本作战需求,以舰载反潜直升机做为模板,着重舰载直升机飞行员抗眩晕能力的训练研究。从生理机理分析,舰载直升攻击机飞行员应如何提高抗眩晕能力,研究设计出较为科学的训练方法。 相似文献
6.
1