时气

• The flight control system of attack helicopter and the influence of disturbance during noe flight are studied in this dissertation . and the use of h robust control and dynamic inversion schemes in flight control system are discussed
  本文主要对贴地飞行时武装直升机的飞行控制系统进行深入的研究和探索，讨论了贴地飞行时气流扰动对直升机系统的影响，研究了h _鲁棒控制和动态逆控制在直升机飞控系统中的应用。
• Abstract : the stability of the wall - climbing robot which climbs on are surface was analyzed in this paper by using theories about integral equation . a new kind of sealing structure was designed and its ability of solving the problem of gas leakage when robot climbs on are surface ， was proved by our experiment
  文摘:本文利用积分方程的有关理论对爬壁机器人在弧面上爬行时的稳定性进行了分析求解.提出了一种新型的钍对弧面上爬行的爬壁机器人的密封结构.经过实验验证了此结构能够解决爬壁机器人在弧面上爬行时气体汇漏量大的问题
• The physical experiments and theories on thermodynamics prove that gas thermal insulation coefficient changes apparently when hydraulic transition process happens . so four appropriate processes were given - sub - process 1 of compressing , sub - process 2 of inflating , sub - process 3 of inflating , sub - process 4 of compressing
  试验与理论分析表明，在管道系统发生水力过渡过程时气体多方指数n存在较为显著的变化，并非单一常数，从而提出了相应的四过程：即压缩子过程1 、膨胀子过程2 、膨胀子过程3和压缩子过程4 。
• Then the air distribution system of the above - mentioned hotel ' s multi - function - hall was simulated with fidap , and the indoor temperature and velocity under the preliminary option was calculated . under the half - load condition of small air - supply quantity and slow velocity , finds that the problem has arisen , which the cold jets fall too fast in summer and the air distributes layer upon layer in winter
  然后应用fidap对上述旅馆的多功能厅空调气流组织初步方案进行了数值模拟计算，预测了该初步方案的室内温度、速度分布，发现在送风量和送风速度小的半负荷工况下，会出现夏季送风时冷射流过早下降，冬季送风时气流分层分布的现象。
• It was still a technical problem on how to add the air to the reactor in so small pressure difference . in addition , the photocatalytic reaction efficiency was very low at the high speed . the reactor will be large , the price will be very high and the electricity will be enormously consumed during the photocatalytic - oxidation of h2s in the methane
  主要原因是沼气中不含氧，使用时气体流速大，压差小，而用光催化氧化方法消除h _ 2s需要有相当量的氧参与，在压差很小的情况下，一次空气的加入存在技术困难；在高气体流速条件下，光催化效率低，若用光催化方法消除h _ 2s ，反应设备庞大，耗电量高，价格昂贵，农民难以负担。
• We have summarized a set of theoretical approach to this problem and discussed the instability of the gas cloud and the systems composed of collisionless particles in the background of dark matter . linear perturbation theory is the method to solve this problem , in which , we add the perturbation into the equilibrium state and discussed its evolution
  本文研究了自引力系统的稳定性问题，总结了解决该问题的一套理论方法。并具体研究了存在暗物质背景时气体云和无碰撞粒子系统中扰动的演化情况。解决稳定性问题的方法用线性扰动理论，即在平衡态中加入扰动，研究扰动在系统中的演化情况。