查询词典 gravity flow

In this paper, the bump patterns for flip-chip packages are discussed first, then an experiment is setup to study the dispensing phenomena for different bump patterns, and the CAE software is used to analyze and identify with experiment mutually. From these thorough comparisons and analytical analysis, the existence of channel could slow down the flow, the high density of bump could speed up the flow, and it could avoid the air trap by modified the bump and channel's arrangement on flip-chip package. Then flows in rectangular microchannels driven by capillary force and gravity are discussed; furthermore, the theoretical model of flow in microchannel driven by capillary force and gravity is formulated from the Navier-Stokes equations.

本文首先针对覆晶底部充填进行相关理论推导、实验与模拟，探讨不同凸块配置模型所造成的波前不平滑现象对底部充填流动的影响；即依据相关参数建立模型进行底部充填实验，同时以CAE(Computer-Aided Engineering)模流分析软体进行模拟，在完成理论探讨、实验与模拟分析之后，交叉比较理论、实验与模拟分析结果，归纳出影响底胶充填流动之因素，由结果显示在凸块密集度较高的区域，凸块可以帮助流动，但是在凸块区后方的沟槽区域则因为凸块区所提供之流量不足，所以会造成波前落后的现象，另外藉由修改凸块与沟槽配置的关系，可以有效的控制波前形状的变化情形，避免产生包风现象。

A different orientation would mean a change of earth gravity acting on flow boiling heat transfer. Based on analysis of the influence of buoyancy on flow boiling heat transfer at different orientation angle, the vertical upflow and downflow are used as ways of the arrangement of heating surface for the modeling test on earth's surface of the ...

在浮力对不同方向角下流动沸腾换热影响分析的基础上，提出了采用立式上升流和下降流来作为地面模拟微重力下流动沸腾试验的加热面布置形式，通过对这两种工况的比较研究可以典型地说明重力场对流动沸腾换热的影响。

The experimental results of two-phase flow and electric performance reveal the two-phase flow characteristics, the rule of bubble growing and breaking away and the effect of the gravity factor on cell performance.

该测试系统与作者自行设计的透明燃料电池以及落塔系统共同构成了微重力环境下直接甲醇燃料电池阳极流道可视化的研究平台。

Good reservoir mainly includes sublacustrine fan-in-fan braided channel sand body and axial gravity flow channel sand body.

好的储集体主要有湖底扇中扇辫状水道砂体和轴向重力流水道砂体。

We accomplished the whole study by the following logic: according to the currency of the world grain trade flow, we constructed the grain trade gravity model and analyzed the main influential factors on the grain trade flow to promote the function of regional trade liberalization on the grain trade flow and forecast the accurate effects of the future regional trade liberalization organization on the main national grain trade varieties under the general balance frame.

全文按以下思路展开，根据世界粮食贸易流动的现状，通过构建粮食贸易引力模型，对影响粮食贸易流动的主要因素进行分析，判断区域贸易自由化对粮食贸易流动具有促进作用，进而在一般均衡的框架下预测未来可能成立的区域贸易自由化组织对我国主要粮食贸易品种的具体影响。

It introduces the cross correlation speed measurement, gravity-fed flow experiment device and the gas-solid flow laboratory equipment, to do systemic experimental research on the characters of the gas-solid flow measurement.

分别采用了相关速度测量法、自由落体实验平台法、气固两相流综合实验平台法，对气固两相流的静电法测量特性作了系统的实验性研究。

Kempers' study , the more layers the mesh screen type had, its resistance against gravity was higher, but its heat resistance and flow resistance were comparatively augmented. As mentioned in the preceding paragraph, it is extremely difficult for a single micro structure based on any of the three types to possess both low flow resistance and strong capillary force. Faced with this fact, the researchers have tried to mix the three micro structures in Table 2 into as many combinations as possible so that a composite micro structure with low flow resistance and great capillary force may be fabricated. After a thorough analysis, the groove combined with sintered metal or mesh screen has been found to be a better alternative. However, the groove combined with sintered metal will raise the flow resistance of the channel, and the aluminum substrate employed in this research cannot be sintered into a micro structure. As a result, the groove combined with mesh screen is finally chosen as the composite structure to enhance its capillary force and at the same time maintain its high permeability. In this way, the heat pipe will not fail due to the working angles.

Kempers 的研究当中提到，当网格结构越多层时，其对抗重力的能力也越强，但相对的其热阻以及流阻也越高，就如同前段所述，我们很难在单一结构当中找出一流阻低且毛细力之微结构；因此本研究便以表2中之三种微结构进行组合，找出一低流阻且毛细力强之复合式结构，经分析发现，沟槽搭配烧结以及沟槽搭配网格为较佳之组合方式，但由于烧结搭沟槽构造将会提高流道之流阻，且本研究使用铝做为基材，并无法使用烧结最为其微结构，故将采用网格搭配沟槽之复合式结构提高结构的毛细力，并维持沟槽结构的高渗透性，解决因角度造成热管失效的问题。

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。

During the development of sedimentology, the new fields of petroleum exploration have been found in special sedimentary facies, such as fluvial, delta, slump turbidite fan ,gravity flow deposit and carbonate...

中国岩相古地理的研究为推动油气资源勘探开发起到了不可替代的作用，已在不同地区和地质层位中找到了极为丰富的油气资源。

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。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。