查询词典 gravity-fed

Because that the middle and upper atmosphere is a complex system of coupling between the dynamics, photochemistry and radiation, in this project, we mainl study the effects of the interaction between the dynamics, photochemistry and radiation on gravity waves propagation in the mesosphere and low thermosphere by using a photochemical-dynamical gravity wave model.

由于中高层大气是光化、辐射和动力相互作用的复杂系统，本项目集中探讨了光化和辐射所造成的非绝热过程对中高层和低热层大气重力波的影响，着重对中层顶区大气重力波不稳定机制以及光化-动力学耦合过程进行研究，并把计算结果与观测进行比较。

This paper collects the latest data in different fields of geological researches on mid-Asian area such as regional geology, Bouguer gravity, aeromagnetic, satellite magnetic, DEM, seismic tomography, modern earthquake, isotope age, deposit occurrence. In this paper, GIS, gravity and magnetic data processing software, and advanced image processing software are employed for the first time to analyze and process large amount of complex data, from which much helpful information were obtained. Such information offered reliable basic data for doing assessment and interpretation, therefore make possible to put forward, from geophysical point of view, a set of new views and methods in studying of tectonic of mid-Asian area.

本文收集了中亚地区区域地质、布格重力、航磁、卫星磁力、地震层析成像、现代地貌、现代地震、同位素、已有矿床分布等多源地学信息的最新成果，首次利用地理信息系统、重磁数据处理软件、先进的图像处理软件对中亚地区的多源数字化数据进行集成，透过纷繁复杂的现象，总结规律，从中提取了许多有用的信息，为判识和综合解译提供了可靠的基础资料，从地球物理角度提出了一套研究中亚地区大地构造的新思路、新方法。

We study the post-Newtonian limit of a generalized dilaton gravity in which gravity is coupled to dilaton and electromagnetic fields.

我们研究了较广义的Dilaton重力理论的后牛顿极限。

Evidence suggests that 1 under more stable stratification, the basic flow, if moving faster at low and high levels (particularly in the presence of jets there), allows a resulting meso-β unsteady wave to propagate eastward with respect to basic flow and even at greater velocity compared with it; 2 vertical windspeed shear of basic flow causes instabilities of the TWT perturbation; 3 considering the second derivative of basic-flow wind with respect to z (denoted by zz≠ 0 which is simply given as β* hereafter) the expression for the phase velocity of vortex Rossby wave is obtained, which is unidirectional in propagation with respect to basic flow; 4 VRoW has its physical origin from β*, i.e., from z-varying heterogeneities of y-direction averaged vorticity of the basic flow field; 5 VRoW phase velocity is associated with zonal wave number k, its energy is dispersive and the group velocity exists in the x direction; 6 when windspeed meets the condition of β*, TWT disturbance instability may be that of mixed VRoW and gravity wave; 7 if basic flow is subject to linear shear but does not meet the condition of β*, the TWT instability is that of inertia-gravity wave.

在大气层结比较稳定的情况下，如果基本气流在低层和高层较大(有可能存在低空急流和高空急流)，此时产生的β中尺度不稳定扰动相对于基流向东传播，甚至于快速向东传播。基本气流在垂直方向上的风速切变对于中尺度横波型的扰动起着不稳定的作用。如果考虑基流的二次切变，可以得到涡旋Rossby波的相速度表达式，涡旋Rossby波相对于基本气流是单向传播的。涡旋Rossby波产生的物理根源是基本流场的风速二次切变，亦即基本流场y方向的平均涡度在空间z方向上的不均匀所致。涡旋Rossby波的相速度与纬向波数也有关，它的能量是频散的，其在纬向x方向也存在群速度。在基本流场的风速存在二次切变时，横波型不稳定可能是混合的涡旋Rossby重力波的不稳定；而在基本流场的风速仅仅存在线性切变，不存在二次切变时，横波型扰动的不稳定则是重力惯性波的不稳定。

The results show that when gravity wave's propagating in the homogenous winds, the nonlinearity is stronger in the fair wind than in the contrary wind, the background winds change the propagation velocity and path, and when gravity wave's propagating in the homogenous winds, the vertical wavelength decreases, the average upgoing energy flux reduces which implies the ambient winds absorb the energy of the wave, realizes coupling of the different atmosphere layers.

结果表明，当重力波在均匀风场中传播时，非线性效应在顺风场中比在逆风场中更显著，背景风会改变重力波在水平方向的传播速度和传播路径；当重力波在剪切风场中传播时，重力波在垂直方向上平均能流随高度的增高而减少，表明背景吸收了重力波的能量，在重力波向上传播的过程中，实现了大气各层之间的耦合。

Water inside vacuum heat- collection tubes; since the hot medium inside vacuum tubes floats up and cold one goes down due to respective specific gravity, hot and cold mediums convections up and down to cause the heat conduction, furthermore transfer the heat to the related working medium in the heat tubes, the working medium sorbs the potential heat and becomes steam to rise up to the condensing section from the tube heat evaporating section; it emits the heat in condensing section to change again into liquid working medium; it flows back to evaporating section under the gravity action, the emitted heat is transferred into the water inside water tank or tube group by means of the heat-conduction through heat tubes condensing section; it makes the cold water in water tank into hot water in the repeated way.

阳光透过全玻璃真空集热管的外玻璃，照射到涂覆在内玻璃管外表面的选择性吸收涂层上，涂层将太阳的辐射能吸收并转化为热能，通过内玻璃管壁导热，传递给真空集热管内其液态传热介质，由于真空集热管内热的介质因比重小而上浮，冷的介质因比重大而下沉，冷热介质上下对流传热和导热，再通过热管的金属壁导热，将热量传递给热管内其相变工质，工质吸收汽化潜热而变成蒸汽，由热管蒸发段上升到冷凝段，在冷凝段放热冷凝，又变成液态工质，在重力作用下流回蒸发段，所放出的热量通过热管冷凝段金属管壁导热，传递给水箱或联集管内的冷水，周而复始，于是便将水箱内的冷水全部加热成热水。

The particles with heavy specific gravity are discharged from the underflow mouth and those with light specific gravity are discharged through the overflow pipe and thus it realizes the separation for heavy and light particles.

流体自旋流器上端给入并在旋流器内形成强制旋转流，旋转流将颗粒按粒度和比重分为内外环层，当矿浆流动至锥体部分时，由于锥体的突然变向，阻力增大，颗粒群向下运动的趋势减缓，并在此形成旋转悬浮层，随着离心力场的减弱，重力作用越来越明显，由按粒度和比重分成的内外两层逐渐转化为按比重分选的上下两层，比重大的颗粒通过底流口排出，比重小的颗粒则通过溢流管排出，从而实现轻重颗粒间的分离。

"We conducted research with the chip while we were flying in parabolas over the Gulf of Mexico, going from two times Earth's gravity to zero gravity again and again," he said.

他说，使用该芯片，即使在墨西哥湾上空进行抛物线式飞行时，即一次次从两倍重力到失重状态的过程中，我们也可以进行我们的研究工作。

During the 20042005 austral summer season, the absolute gravity and relative gravity were measured at the Great Wall Station. The tide gauge was set up in Zhongshan Station in 2000. The SAR interferometry was applied to build the DEM of ice sheet and to monitor the ice flow in the polar region.

具体介绍了以长城站、中山站和黄河站3个GPS观测站为依托，开展的板块运动、卫星定轨及极区大气环境监测方面的研究；GPS在埃默里冰架、格罗夫山及Dome A考察中的应用研究；长城站的高精度绝对重力及相对重力测量；中山站自动验潮站的建立；及合成孔径雷达干涉测量在南极内陆冰盖的应用研究等。

The effect of gravity direction on the departure of wall nucleation bubbles were analyzed by changing the angle between the heating surface and gravity.

通过改变加热表面和重力方向之间的夹角，分析了重力方向对表面成核气泡脱离机制的影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。