模拟型

This thesis analyzes the types and art trait of solar-assisted heat pump water heater, the development trend of direct expansion solar-assisted heat pump water heater, makes a summary of these research results from six aspects. On the basis of these works and from the point of view of receiving optimum solar radiation , the thesis develops a novel design model of direct expansion solar-assisted heat pump water heater with a truncated cone collector/evaporator, theoretically analyzes the heat that the system can absorb, compares its ability with other two types of cylinder and flat plate ones, and calculates COP and EER with computer aids. The results show that a truncated cone direct expansion solar-assisted heat pump water heater can absorb not only more solar energy but heat energy in air. It takes on favorable thermal performance. Under the average day in February which is of the worst weather throughout the year in Kunming, the COP is about 4. 2, EER is about 2.9 . The heat absorbed by the system are more than those of the other systems. The system is very great in terms of saving

本文分析研究了太阳能热泵热水系统的分类及技术特点，直膨式太阳能热泵技术国内外发展趋势，从六个方面对直膨式太阳能热泵热水系统的研究进行了归纳总结；在此基础之上，从太阳辐射的最佳接收考虑，提出了集热器／蒸发器为圆台侧面的圆台型直膨式太阳能热泵热水器的设计模型，理论上分析了这种热水系统所接收的太阳辐射和得热量，并与圆柱型、平板型的直膨式太阳能热泵热水系统进行对比分析，通过计算机辅助模拟计算出：系统不但可以有效地吸收太阳能，还能有效地吸收空气中的热量，具有良好的热性能；在昆明，以2月为代表的冬季，其太阳辐照较低，系统的制热系数COP值也能达到4.2，效能比EER值为2.9；系统的得热量高出圆柱型、平板型的直膨式太阳能热泵热水系统，节能效果明显。

Velocity field inside of arciform greenhouse , fastigium greenhouse , parabola greenhouse and slanting crest greenhouse have been studied by numerical simulation of 3D turbulent flow.

本文对拱型、屋脊型、抛物型、斜顶型大棚这四种断面型式的大棚采用上述紊流模型，对其内部流场的流动进行了数值模拟。

Five types of traps, including compressional, extensional, shearing, gravitative and strata litholoical types, were divided on studying the feature of different tectonic movements , seismic sequences and depositional property in Wan an Basin.

作者在分析该含油气区地质构造特征、地层划分和沉积特征的基础上，划分了压缩型、伸展型、剪切型3 种构造类圈闭和重力、地层－岩性两种非构造型的圈闭，并选用南、北两条典型地震剖面模拟了典型圈闭形成过程及其与构造运动之间的演化关系，可为在该区中寻找同类型含油气圈闭和进行构造演化史的研究提供可靠依据。

The experimental method of mercury porosimetry was applied to determine the porous properties of typical mixed bio\|briquettes in two typical pore systems to overcome the limitations of past researches on the characteristics of their sulfur retention were compared to those of classical sulphuration reaction.

根据生物质型煤的孔径分布特征，建立孔隙分形结构模型，模拟相同分维的生物质型煤的孔隙率和比表面积；从孔隙分形结构的形核、生长的角度，探究生物质型煤的脱硫机理；进而得出生物质型煤分形结构存在的孔径范围，以及分维、均孔等分形几何参数与生物质质量分数的规律。

The feasibility of simulation test for antilock braking is analyzed using JF-132 vehicle brake tester.

第三，探讨了在JF-132型制动器试验台上模拟防抱制动的试验方法，分析了模拟防抱制动的可行性，对试验台的管路系统作出了改进，在试验台软件系统的基础上，编制了模拟防抱制动的试验程序，试验结果证明了该试验方法的有效性。

After analyzing the numerical simulation results of the impeller blade with different scale, and comparing the flow field distributing, then one kind of double-head anti-unsymmetrical S mode airfoils is found which is suitable to the normal and the reversed blowing for double directions under the design operating condition and which can also satisfy the requirement for the reversible axial flow fan in subway.

分析缩放比例不同的可逆式轴流风机叶型的数值模拟结果，比较各种叶型的流场分布规律，寻找到一种适合于设计工况下正、反双向吹风的双头双机翼反向不对称S型叶型，能够满足地铁用可逆轴流风机的要求。

The result show that the position of free surface is higher because of frusta of brake, especial obvious in the head of frusta of brake; flux coefficient and pressure on dam are quite influenced by type of frusta and 3 A type frusta of brake relative to 2 type frusta of brake has bigger flux coefficient and smaller pressure on dam; Obvious influence of ability of discharge flow for different ratio of thickness of frusta and breadth of brake and pressure on dam reduces with increasing ration of thickness of frusta and breadth of brake, while bigger flux coefficient is obtained when tlb = 0.2.(7)The 3D free surface turbulent model established in the paper is comparatively well and truly simulates 3D flow over spillway with frusta of brake and series waterpower computation can be completed aim at different type of dam, type of frusta and disposal on the dam and different water height on peak of

结果表明，闸墩河海大学博士论文的存在抬高了水面线的位置，其中在闸墩头部尤其明显；墩型对流量系数和坝面压力影响较大，3A型闸墩相对于2型闸墩具有更大的流量系数和更小的坝面压力：不同的墩厚闸宽比t/b对泄流能力也将产生显著的影响，随着墩厚闸宽比的增加，坝面压力降低，而当t/b二0.2时溢流坝具有更大的流量系数。7本文建立的三维自由面湍流场模型能够比较准确地模拟带闸墩溢流坝三维过坝水流湍流场，可以针对不同的坝型、墩型、坝面布置形式以及不同的坝顶水头完成系列水力计算，为泄水工程建筑物的设计提供可靠的分析依据

The effects of structural parameters of liner and initiation methods on projectile formation and performance parameters were shown by simulation, the interrelations of structural parameters of liner were preliminarily fixed on, the inner radius of liner R1=(0.55-0.6)D, outer radius R2=(0.58-0.62)D, height H=(0.3-0.35)D, half cone angle α=82°-86°, where D is diameter of liner.

通过模拟计算得到了药型罩结构参数和起爆方式对弹丸成型的影响规律，并初步确定药型罩结构参数间的相互关系：药型罩直径D，内径R1=(0.55~0.6)D，外径R2=(0.58~0.62)D，药型罩高度为H=(0.3~0.35)D，半锥角α=82°~86°。

The industrial magnesia and vitriol are used to produce magnesium sulfate in this paper, and the simulated wastewater is prepared using magnesium sulfate and kaolin. The flocculating effect of polyacrylamide, cationic polyacrylamide and anionic polyacrylamide is studied and compared through measurement of absorbency by spectrophotometer.

利用工业氧化镁和硫酸制备一定浓度的硫酸镁，结合高岭土配制氧化镁烟气脱硫的模拟废水，通过分光光度计吸光度测定了聚丙烯酰胺、阳离子型聚丙烯酰胺和阴离子型聚丙烯酰胺在模拟废水中的絮凝效果。

By comparing several turbulent models, standard k -εmodel , renormalisation -group k -εmodel, realizable k -εmodel, standard k -ωmodel, shear stress transport k -ωmodel, it can be concluded that the RNG k -εmodel predicts more realistic results than the other models used in the simulations.

比较分析Standard k -ε模型、RNG k -ε模型、Realisable k -ε模型、Standard k -ω模型及SST k -ω模型模拟缩放型喷嘴产生空化水射流流场，结果表明RNG k -ε模型更适合数值模拟缩放型喷嘴内的射流压力速度等分布状态。

He knows that he's one of the mostdominant players in the NBA right now.

我知道他现在是联盟里最有统治力的球员之一了。

Using analysis method of BCG , the dissertation analyzed the management of voluntary service organizations .

利用BCG分析方法对我国的志愿服务组织管理进行了分析。