The FEM equation of acoustic wave is used to calculate the air-current natural frequency and pressure pulsation in the pipeline.
利用有限元法求解声学波动方程，建立了管内气流的有限元运动方程，计算出管内气柱的固有频率和气流压力脉动。
Features: Made of Stainless steel; adopting air-current circulating heating system and adjustable shelves, thermostat and timer; also we supply the double-door model.
特性：全不锈钢柜体、热风循环发热系统、可调节式碗碟层架、自动控温和定时装置、电子面板控制、并有双门型号提供。
In accordance with these problems, the writer designed out up an groove leading air-current in the front top roller, in the result, the formed yarn strength increases obviously.
针对以上问题，作者设计了前皮辊导流槽，结果使成纱强力明显提高。
Wind is a current of air caused by a vacuum caused by hot air rising.
风是由热空气上升产生真空而引起的空气流动。
This cold air current from the land is so forceful that it makes the nearby seas the stormiest in the world.
来自陆地的冷空气非常强大，它使附近的海洋成为世界上最狂暴的海洋。
Admittedly, there are various factors contributing to the current worldwide air pollution, but it is undeniable that the exhaust from automobiles is categorized as one of the major elements.
诚然，有很多因素导致了现在的全球空气污染问题，但是不能否认的是汽车废气被归为最重要的因素之一。
Rich countries account for most of the past emissions that now fill the air, but less than half the world's current emissions.
大气中累积的绝大部分温室气体由发达国家排放，但发达国家目前的排放量还不到世界总量的一半。
Moreover, even if you take the study’s claims at face value, it offers little reason to believe that dirtier air and water can solve our current employment crisis.
此外，即使你从表面价值上面观察这份研究报告提出的观点，报告也几乎没有提出什么理由，使人们相信让空气及水源变得更脏就会解决我们当前的就业危机。
Cold air and a warm and wet air current will affect most regions in Central and East China starting January 19, bringing rain or snow, the National Meteorological Center forecast.
据中央气象台预报，19日起，受冷空气和暖湿气流的共同影响，我国中东部大部地区将出现较大范围雨雪天气。
A view of the National Mall in Washington, D.C., shows construction of the current National Air and Space Museum building underway in December 1972.
从华盛顿特区国家广场的视角看1972年12月正在建设中的国家航空航天博物馆场景。
Air interface tailored to minimize current consumption.
无线电空中接口使电耗达到最小“蓝牙”基本技术概要。
Efficient ventilation and sound air current are significant to improve indoor air quality, control the contamination concentration, and ensure the realization of healthy and comfort air-condition.
有效地通风和合理的气流组织对于改善室内空气品质，控制室内污染物浓度，保证实现健康建筑、健康舒适性空调有着重要的意义。
And found-that to increase the degree of openness of fiber and to control correctly the entering air current are two efficient ways to improve fiber web irregularity.
并认为提高纤维开松程度、梳理程度，控制补风方式是降低纤维网横向不匀率的有效途径。
Based on the boundary condition of jet flow in a niche and the interaction of jet with air current, a pressurization relation equation have been established.
本文根据壁龛射流的边界条件，进行射流与通风气流之间运动和力的作用关系分析，建立了壁龛射流的增压关系式。
The subsidiary door, matching with the common door plate, can not only barricade the sight of outsiders but guarantee air current through the door.
这种辅助房门配合普通房门使用，不仅能遮挡房外人的视线，而且能保证房内外空气流通。
When confronted momentarily with an ascending air current, the paraglider climbs since the Angle of attack has increased.
当我们遇到暂时性上升空气时，飞行伞会随著攻角增加而上升。
First we presume feeding rate, ascertaining the velocity of air current, ascertaining the feeding quantity by farm technical demand and ascertaining wind quantity, calculating the diameter of pipe.
首先假定输送比，初定气流速度，由农业技术要求确定排种量，从而确定风量，计算得到管道的直径。
These will cause typhoon track to deviate from its normal dominating air current and move northward, then pass through subtropical high, thus typhoon Knotty track appears.
这两种情况，都会使台风路径偏离常规的引导气流，向比较偏北的方向移动，并可能穿越副高，从而形成了台风疑难路径。
The monthly averaged basic air current was approximately the barotropic instable condition which was measured by the meridional gradient of absolute vorticity.
对于这个月月平均基本气流，进行正压不稳定度判据的检定，发现存在接近正压不稳定的条件。
In regions strongly influenced by maritime monsoon and moist air current, the vertical zonality of grassland coincides basically with horizontal zonality of grassland.
一般受海洋季风和湿润气候影响强烈的地区，草地垂直地带性和水平地带性基本一致。
Some measures such as the positive pressure well, the negative pressure well, the high efficiency exhaust sealed with dynamic air current are all effective in theory.
本文又在负压区运用了正压井、负压井、动态气流密封负压高效排风装置等一系列有价值的措施，并在理论上证实其实用意义。
The air current water extractor is gluten flour produces the widespread application drying apparatus.
气流干燥器是谷朊粉生产广泛应用干燥装置。
Simple comparison is made with the test results, and the method to effectively predict the air current organization inside the car is put forward initially.
并与试验结果进行了简单对比，初步提出了有效预测车内气流组织状况的方法。
Land Formation and rivers China's land drops off in escarpments eastward to the ocean, letting in humid air current and leading many rivers eastward.
土地平整及河流中国的土地上落崖向东过大海，在潮湿的气流，并导致许多河流向东。
The effects of mass of samples, air current velocity on test results were researched in the experiment.
通过实验，考察了样品取样质量、空气流速对实验结果的影响。
Because the plastic greenhouse prevents the changes of air current, there is a limit scope climate effects in the plastic greenhouse.
塑料大棚隔绝了棚内与棚外的气流交换，造成棚内高温高湿的小气候效应。
Because the plastic greenhouse prevents the changes of air current, there is a limit scope climate effects in the plastic greenhouse.
塑料大棚隔绝了棚内与棚外的气流交换，造成棚内高温高湿的小气候效应。
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