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Capillary phenomena was studied and discussed by the scholars about 200 years ago, but the progress was slow due to the limited equipments and manufacture precision of the microchannel.In recent years, because of the rapid development of MEMS and micromachining, many applications of the capillary flow is widely developing in some modern processes, such as underfilling of flip chip, flow in microfluidic chip or biochip, and a variety of other fields.

摘要 毛细现象大约在200年前便断断续续被欧美学者所研究讨论,但由於当时微细加工受到仪器设备和制造精度的限制,因此发展极为缓慢;近年来由於微机电系统与微细加工之精进,许多具有微流道的应用设备,陆续被制作问世,加上光学显微镜与影像撷取设备的普遍,对於研究此课题的推展极有助益;且随著微生医、覆晶底胶充填与微流体系统等领域之受到重视,毛细现象导致的充填问题、驱动原理及液体流动的控制,都变得相当的重要;本研究基於如此的动机与目的,进行微流道内液体之毛细流动现象及时间的探讨。

Dilatation of the bile duct supporting drainage : Due to a longer section of the bile duct stenosis and unremovable lesion part, biel duct tube or U-shaped tube drainage could be employed.

胆管扩张支撑引流术:对于较长节段胆管狭窄、又不能切除病变部位者,可行胆管内置管支撑或 U 形管引流。

Practically, there are unsteady flow in the water diversion system of the pumping station as a result of the change of upsteam stage and pump operation stage. It has important significance for the optimum operation and management of the pumping station to study on one-dimensional unsteady flow of water diversion system of the pumping station.

同时在泵站实际运行过程中,由于上游水源水位和泵站运行水位变化的影响,引水系统内往往会产生非恒定流,因此,泵站引水系统非恒定流计算研究对泵站的优化运行和管理具有重要的理论意义和实际应用价值。

By Ensemble-averaged Method, the mean field was got to show the 3D structure of flow. By Phase-locked Averaged Technique, the periodic mean field was got to reflect the periodic unsteady characteristic. The 3D structure and the periodic unsteady characteristic of the unsteady flow within the vaneless and vaned diffuser were discussed through analyzing the mean field and the periodic mean field.

离心风机扩压器内非定常流动的实验研究本文完成了离心风机两种结构条件下无叶扩压器、有叶扩压器内部的非定常流动瞬态全流场的实验测量,获得了不同运行工况下PIV的瞬态流谱,为研究扩压器内部非定常流动提供了基础实验资料。

ABSTRACT On the basis of the early study of axial flow vaneless nozzle , an axial double-flow vaneless nozzle with rotati...

在轴流无叶喷嘴研究的基础上,本文提出了一种做为大功率汽轮机低压缸进口第一级的新型轴流无叶喷嘴-双出口、内环旋转式。

ABSTRACT On the basis of the early study of axial flow vaneless nozzle , an axial double-flow vaneless nozzle with rotating inner ring is developed for the first stage of the double-flow turbines.

在轴流无叶喷嘴研究的基础上,本文提出了一种做为大功率汽轮机低压缸进口第一级的新型轴流无叶喷嘴-双出口、内环旋转式。

In order to calibrate the model, data of six typhoons such as the flood peak and the peak time are collected to compare with the result of the simulations. The result shows that the difference of the inflow hydrograph between them is very close. The average error of the flood peak is 5.21%. Furthermore, the error of the peak time is less than one hour but Wenny Typhoon is an exception by more than two hours. Therefore, the model could be applied to simulate the rainfall event at Shih-men watershed.

为验设模式模拟精确性,本研究以具代表性之六场台风降雨模拟,针对石门水库入流历线之观测流量与模拟值比较,结果显示模拟之水库入流历线与观测值差异不大,其尖峰流量误差绝对个平均为5.21%;另在预测洪峰到达时间方面,除温妮台风迟迟2小时外,其余均在1小时内,显示本分析模式可应用於石门水库上游集水区暴雨事件模拟。

On the basis of Bowering Model about ONB of flow boiling using n.

讨论了影响矩形窄缝流道内过冷流动沸腾起始点的各因素,在Bowering关系式的基础上,考虑质量流速和压力对过冷流动沸腾起始点的影响,使用多元线性回归的方法,得到了关于矩形窄缝流道过冷流动沸腾起始点的修正关系式,与实验数据进行比较,误差范围为± 30 %。

On the basis of the stem heat balance principle to measure the plant transpiration, with the instruments to collect meteorological data in greenhouse, we studied the variation rules of tomato sap flow under different environmental treatments through shading and obturating environment.

在茎热平街技术测定植株茎流的原理基础上,结合温室内气象数据采集仪器,通过对小温室做遮光、密闭处理,探讨番茄茎流的变化规律。

Our experimental measurements reified this new theoretical model of describing the capillary filling behavior. The dynamic contact angle depends on Oh and f Re, the capillary filling distance scales with the square of capillary filling time.

依据描述该现象的理论关系式,发现方型微流道内表面张力流毛细填充现象与动态接触角α、欧氏数Oh与无因次化参数f Re有关,藉由实验量测的方式,发现动态接触角为欧氏数Oh及f Re值的函数。

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