流

Doing researches on workflow time management is important to enriching the theory of workflow modeling, to enhancing the flexibility and practicality of workflow management software systems, to guarantying workflow plans to be efficiently executed, and to making enterprises more competitive.

开展工作流时间管理的研究，对于丰富工作流建模理论、开发灵活和实用的工作流管理系统、确保工作流计划的高效执行和提高企业的竞争力具有重要意义。

Based on above-mentioned 3-D mathematical model, a comparison study of PEMFC with conventional and interdigitated flow fields has been conducted at last.

详细分析和比较了两种流道设计的流动和传质特性，结果发现，与传统流道的燃料电池相比，交叉梳状流道设计的电池由于流道的一端被封死迫使流体通过电极而产生强烈的强制对流。

The study aims at the performance of a proton exchange membrane fuel cell with interdigitated flow field ,its influencing factors and feasible ways to improve it.

为研究交指流场质子交换膜燃料电池的输出性能，分析影响其性能的因素，寻找改善其性能的可行措施，探讨了使用交指流场流道的必要性和优越性，建立了包括质子交换膜燃料电池阴极/阳极侧流道、扩散层和催化层以及质子交换膜在内的完整的稳态、三维、两相数学模型。

The study aims at the performance of a proton exchange membrane fuel cell with interdigitated flow field, its influencing factors and feasible ways to improve it. The necessity and advantages of using interdigitated flow field were introduced. A three-dimensional, two-phase and steady-state numerical model was developed. The computational domain of the model consists of the flow channels, gas diffusion layers and catalyst layers in both anode and cathode sides and the PEM in PEM fuel cell.

为研究交指流场质子交换膜燃料电池的输出性能，分析影响其性能的因素，寻找改善其性能的可行措施，探讨了使用交指流场流道的必要性和优越性，建立了包括质子交换膜燃料电池阴极／阳极侧流道、扩散层和催化层以及质子交换膜在内的完整的稳态、三维、两相数学模型。

Through the analysis of the distributions of cold pulverized coal concentration and the area of high concentration zone, it was concluded that the smaller the central air expanding angle was, or the later the secondary air interfused, the larger the area of high concentration zone was.

通过分析冷态煤粉浓度的分布及煤粉高浓度区域面积的大小，得到：中心管扩角越小，二次风混入越晚，冷态高煤粉浓度区域面积越大；一次风率为0.2、一次风速为15 m/s、直流二次风速为25 m/s时冷态高煤粉浓度区域面积较大，有利于降低NOx的生成；内二次风旋流开度减小较外二次风旋流开度减小对冷态高煤粉浓度区域面积的影响大；内旋流强度为1.35、外旋流强度为1.56为最佳的试验工况。

Under experimental results of wax deposition and phase change, the mechanical characteristics of fluids flowing through porous media and the relevant physicochemical problem were all summed up as solving the gas-liquid-solid coupling mathematical model. After considering the phase change action between condensate gas and condensate liquid, wax deposition interlarded with interfacial drag force and capillary pressure engendered in the process of phase change. Numerical simulation results proved that the flow resistance increased and the production output decreased owing to wax deposition.

在蜡沉积变相态渗流实验和渗流数学模型的研究基础上，引入蜡沉积数学模型、考虑毛管力和表面张力的相对渗透率模型等，建立了相应的多孔介质中气－液－固变相态多相流－固耦合渗流数学模型，数值模拟结果表明，蜡沉积可使都分区域孔隙减少，流动阻力增大，不考虑蜡沉积会对产量预测明显偏大，蜡沉积可使产量下降。

Cerebral thalamus and basal nuclei hemorrhage patients with haematoma breaking into lateral cerebral ventricle and the third and fourth ventricle were treared by being put tube into two cornu frontale ventriculi lateralis and haematoma cavityt.

人流没有138例中血肿经过充分引流，奎根试验，夹管试验等措施，如闭管后病人病情加重，可暂时开放引流管并再次注入尿激酶后引流，确认可以拔管后有2例再次置外引流管血玉咒，1例因不能拔管行v-p术。

Based on the 3D time-average Navier-Stokes equations, k-ε model was used to simulate the 3D turbulent flow field of whole flow passage in the Francis turbine including guide wickets, runner and draft tube. The energy performance and cavitation performance were predicted from the simulation results, and the calculated data were compared with the results of hydraulic turbine model experiment. The calculation of turbine efficiency and the measured efficiency was very closed and the maximal relative error was 0.9%.

该文基于Navier-Stokes方程和k-ε紊流模型，采用贴体坐标和交错网格系统，用SIMPLEC算法对一模型混流式水轮机引水元件、转轮和尾水管进行了联合计算与转轮单流道计算，数值模拟了水轮机各通流元件内部三维湍流流场，预测了水轮机的能量性能和空化性能，并与水轮机模型试验结果进行了对比。

Numerical simulation and performance prediction of interior flow field for axial-flow pump with front guide impeller

得到了轴流泵内部流场的压力分布、速度分布情况，并对分布情况的特征进行了分析，初步了解轴流泵内部流场的流动情况。

In the end of this thesis, the data independent detection model of exchange ratedata stream is built. Then, the algorithm provided in this thesis is used on the model to solve the problem of detecting the abnormal data block in exchange rate data stream. Experimental data are also provided.

最后，本文根据实时汇率数据流的特点，建立了数据点相互无关的实时汇率数据流的检测模型，然后采用本文提出的数据流的变化检测算法解决实时汇率数据流的异常检测问题，并给出了实验结果。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。