对流

Especially convection-style ventilation design for the closure of error, providing a more healthy, safe and efficient space.

尤其是对流式通风设计，弥补了封闭的缺陷，提供了更为健康、安全和高效的空间。

A three dimensional Navier Stokes equation is solved with a standard k ε turbulent model. Two experiments were carried out and the total pressure of jet flow was tested. Based on the tests, the differences between the calculated and test results were found to be 3% and 7% respectively. It proved that the results of calculation can well be used in engin...

研究采用数值计算和试验测量相结合的方法，控制方程为三维、雷诺平均 Navier- Stokes方程及 k-ε二方程的紊流模型，并且对该发动机进行了燃气流场的测试，对流场中的总压强进行了直接测量，进行了两次试验；在两次测点位置，试验结果与数值计算值相差分别为 3%和 7%；证明了对双喷管火箭燃气射流流场的数值计算具有了较好的精度，计算模拟结果可以用于工程设计中

The wave propagation and refraction of type "O" irregularities in the counter-electrojet conditions is investigated with a model electrojet in terms of the linear theory of the electrojet instability.

本文分析了反向赤道电射流条件下的不均匀性的对流放大特性。根据电射流不稳定性的线性理论，对一个分层均匀的电射流的模式的数值计算表明：在反向电射流条件下，电射流不均匀性有如下的特性：在波的传播过程中，在上电射流区内，波矢向下旋转，在下电射流区内，波矢向上旋转；在驱动电场E_D数值相同的情况下，反向电射流条件下的射线路径积分增长率r比正常电射流情况的要小得多。

The distributions and variations of the convection electric field,the region l and region 2 field aligned currents, the ionospheric disturbance current system including the auroral electrojet,and ionospheric conductivity all together compose a self consistent organic whole.

对流电场、一区和二区场向电流、电离层扰动电流系，以及电导率的分布和变化乃是一有机整体，对其每一环节的深入认识均与对整体的全面了解密不可分。

A study on physical mechanism responsible for these differences reveals that the principal factor controlling the midnight-morning westward electrojet is ionospheric conductivities, while the principal factor controlling the afternoon eastward electrojet is electric field, instead of conductivities.

电动力学分析表明，在不同地方时段，控制电流的主要因素不同，因而，电流及其磁扰有不同的特点：下午—黄昏东向电集流和晨侧西向电集流组成了DP2电流体系，主要受控于磁层对流电场，反映了&驱动过程&的行为；而子夜—凌晨西向电集流是DP1电流体系的基本部分，主要受控于电导率，反映了&卸载过程&的特点。

Tropospheric convection sports are the most significant atmospheric region.

对流层是对流运动最显著的大气区域。

Researchers from National Taiwan University board ed the AIDC plane at 5 a.m. Saturday before heading for the typhoon. They dropped 15 GPS Dropsonde testing instruments into the storm to measure its structure, intensity and changes.

凌晨五点，台大研究员乘坐汉翔追风计画的飞机，飞往海棠台风的暴风圈外围，突破对流旺盛影响飞行的危险，投掷十五枚探测仪，侦测到台风的结构密度和变化。

So far, we human beings for the heating of the concept has long been restricted to convection, conduction, radiation three kinds of surface heating in it, in recent years the use of molecular friction between the object itself is heated and heat of the principle of the developed in the dielectric heating (including the high-frequency and microwave heating) has been widely used in industrial heating and drying purposes above, this heating method unlike the aforementioned three kinds of methods, the heat do not penetrate the surface, but will wear the electromagnetic energy directly to transparent objects into heat inside a method, also known as the fourth heating methods

到目前为止，我们人类对于加热之观念一直都被局限于&对流&、&传导&、&幅射&三种表面加热方法而已，近年来利用&被加热物体本身分子磨擦生热之原理&所发展出来之诱电加热被广泛应用于工业加热干燥用途上面，此种加热方法不像前述之三种方法，热量不需要穿透物体表面，而是将电磁波能量直接穿透物体内部转换成热量的一种方法，也被称为第四种加热方式

The cylinder bore was divided into sections according to different loads when applying thermal loads on to the inside surface of the cyl inder bore. Finally the regulation of temperature distribution is obtained.

计算缸内传热情况时，只考虑了对流传热；对缸内施加边界载荷时，采取分段加载的方式，最终得到其温度分布规律。

This study focused on the absorption of vapor into aqueous LiBr and the absorption of ammonia gas into aqueous ammonia.

本项目以溴化锂溶液和氨水溶液作为研究重点，主要内容包括：对添加剂作用下的溴化锂溶液和氨水溶液表面张力进行了实验研究，发现添加剂对两种溶液表面张力的影响呈现出不同的性质；利用表面吸附动力学原理，对溶液的表面张力及动态表面张力进行了理论分析；利用激光阴影法对溴化锂溶液静池吸收过程中马拉戈尼对流的形成进行了可视化研究，并进而发现蒸汽添加剂比液体添加剂对吸收具有更好的强化效果；利用实验方法对溴化锂溶液垂直降膜吸收进行了研究，并从其基本方程出发得出了影响添加剂强化效果的主要因素；同时，也对添加剂对氨水鼓泡吸收的影响进行了实验研究；最后，对添加剂的强化机理进行了分析，即对于溴化锂溶液来说，添加剂对溶液吸收的影响主要体现在对吸收界面吸附特性的影响上，无论是气体添加剂还是液体添加剂，都有可能对溴化锂溶液吸收起到强化作用；对于氨水溶液而言，添加剂的影响主要还是体现在&盐析&作用上，当氨水浓度较低时，添加剂有可能对吸收起到强化作用。

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％。