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This paper also researches on the kinematics and mechanics of the push-pull air-cushion vehicle. By velocity composition method, the velocity vector formulae of any point on moving platform is obtained.

本文还就推拉式气垫车运动学和力学两个方面进行了详细的分析，运用速度合成法得到了气垫车转向过程中，运动平台上任意点的速度矢量公式。

In this paper the dynamics characteristics are analyzed theoretically at first. According to the unique configuration and mechanics characteristics, the mechanics model and kinetic differential equation of the half-tracked air-cushion vehicle are established. Algorithm of mechanics and lifting-state parameters are put forward and analyzed. And variation ranges of the driving state parameters are obtained and the corresponding influence factors are analyzed. The further qualitative studies on control model are carried out.

因此，本文首先从理论上分析了半履带式气垫车的动力学特性，根据半履带式气垫车的独特结构和力学特性，建立了半履带式气垫车的力学模型和相应的运动微分方程，提出并分析了在纵摇与升沉运动时，半履带式气垫车的力学参数和垫升状态参数的计算方法，得到了在行驶过程中各运行状态参数的变化规律，并分析了相应的影响因素，进而对控制对象模型进行了定性研究。

So he had gone to the stores and had obtained a fixture that fitted both the tap on the supply line and the end of the air-line.

于是他去了库房拿到能连接供气管和空气管龙头的配合件。

Air-Pressure indirect testing method was brought into effect successfully. While implementing this new testing method, digital filter was used for the first time and good results were obtained.

在实施该测试方法过程中，首次引入可靠的数字滤波环节，取得了良好的测试效果，使该方法提高到了实用化水平。

According to the present situations of the two production lines and the temperature needed by the producing technics of the heat-exchanger , using the numerical simulation with the Airpark software to analyze the reason why the cooling system can not meet the technicals requirement; with the heat transfer theory computation based on the heat transfer principle, the technical parameters of the cooling sect refer to the system technic and configuration are obtained. That are made for reasonable organization of the airflow of the cooling system and the new cooling equipment achieving the technical requirement. At the same time, it will ease the thermal pollution of the circumjacent environment and improve IAQ of the workshop

根据某厂两条换热器生产流水线的现状和冷却降温的工艺要求，用Airpark 软件进行数值模拟，分析了冷却系统无法满足工艺要求的原因；运用传热学原理进行了设备与环境的传热理论分析和计算，分析了冷却系统无法满足工艺要求的原因，得出了改造所需要的技术与结构参数，并对冷却系统进行合理布局与气流组织，使新的冷却系统发挥了应有的作用，满足了生产工艺的要求，同时也减轻了生产环境的热污染，提高了环境的空气品质。

Civil aircrafts and their accommodation equipment are researched and developed according to the standards of US Federal Aviation Agency and the main products are hot-air balloons, paragliders, paramotors, hot-airships, airliner passenger-seats, life-jackets, oxygen-supply masks and etc, most of which have obtained Airworthy Certificate CCAR and Certificate CCAR-TSOA.

民用航空器和民航生活设施均按照美国联邦航空局标准研制，主要产品有热气球、滑翔伞、动力翼伞、热气飞艇、民机座椅、民航救生衣、供氧面罩等，其中多项产品已经取得CCAR适航证和CCAR-TSOA证书。

A stress function involving several unknown co efficients was constructed in the solution process, and the stress and displacement expressions were obtained through traditional Airy stress function methodology. After the fixed end boundary condition was treated with two methods, the unknown coefficients in stress function were determined with stress and displacement boundary conditions, and the analytical solutions were achieved.

在求解过程中，构造了一个含待定系数的应力函数，通过Airy应力函数解法，给出了应力和位移的表达式，对固支端边界条件采用两种处理办法，利用应力和位移边界条件，确定应力函数中的待定系数，得到了应力和位移的解析解结果。

The Airy function is used to calculate the plasma impedance and the grill-plasma scattering matrix is deduced, then the coupling properties of the HT-7 LHCD MJ launcher are studied with the antenna scattering matrix and the grill-plasma scattering matrix based on the liner coupling theory. The average power reflection coefficient, directivity, power spectrum are obtained for different edge plasma densities and for different phasings between main waveguides.

采用线型耦合理论，用艾黎函数计算了等离子体阻抗，推导出常规波导阵对等离子体的散射矩阵，并利用它和天线自身的散射矩阵研究了HT-7装置低杂波多结波导阵天线的耦合特性；计算了其平均功率反射系数、方向性系数和功率谱与等离子体边缘密度和主波导相位差等参数的关系。

If the stellar spectrum is known, the albedo of the dust can be obtained

如果恒星的光谱已知，就可得出尘埃的反照率。

According to the relationship between the surface albedo and meteorological factors such as temperature, rainfall were analyzed, and we obtained the correlations between albedo and NDVI, temperature and precipitation.

对东北地区月均地表反照率与相关气象因子之间的关系进行了分析，给出了其与NDVI、温度和降水之间的统计关系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。