二尖瓣关闭不全程度用频谱多普勒测定的有效返流口面积确定。
Mitral insufficient grades were determined by the effective regurgitant orifice area measured with spectral Doppler.
提出了稳定流量精度的计算公式以及变节流口过流面积的计算公式；
The formulas for calculating the precision of priority flow and the area passed by divided flow are given.
目的：探讨彩色多普勒过返流口宽度在估测二尖瓣返流程度中的作用。
Objective: To explore the roles of color Doppler vena contracta in the evaluation of mitral regurgitation grading.
采用缝隙式出流口时产生漩涡的临界高度比采用同面积的圆形出流口时的低得多。
Using slit outlet, the critical height of vortex sink is substantially lower than that of the round outlet used when the area of outlet and flow are equal.
筛选结果表明，旋流器的溢流口直径和底流口直径对旋流器的分离效果产生较大影响。
The selection result showed that the diameters of the overflow mouth and the underflow mouth of the hydrocyclone had an important influence on the separation result of the hydrocyclone.
其内部由于中心负压而形成空气柱，当流场稳定后，该空气柱从底流口到溢流口贯穿始终。
Air core comes into being because of central minus pressure and goes through the hydrocyclone from the overflow gate to the bottom outlet after the flow field become steady.
本文提出了一种令型喷油器和挤流口燃烧室组成的燃烧系统，并在110单缸试验机上进行了试验研究。
A new kind of combustion system of conical spray nozzle applying in re-entrant chamber is presented in this Paper, and experimental studies are made in 110 model single cylinder experimental engine.
在进料口悬浮液固相颗粒粒级分布相同的情况下，进料口压力和底流口直径的变化同样对分离效率产生影响。
If the grain size distribution of suspending liquid at inlet is identical, the change of inlet pressure and underflow port diameter can influence the separation efficiency.
根据计算结果，分流比对分割尺寸的影响比较小，半锥角、溢流口尺寸与底流口尺寸对分割尺寸的影响比较大。
It is indicated that the split ratio has a relative small effect on the cutting size while the semi cone Angle and sizes of overflow and underflow orifices have very large effects.
有时，较低的口模温度会在口模内表面上生成一个冷却的树脂层，这个树脂层慢慢地移出到口模出口，然后与本体料流分离，从而引起积料。
Sometimes lower die temperatures can create a cool layer of resin on the inner surface of the die that creeps slowly to the die exit and then separates from the bulk flow, causing buildup.
无限大地层中—口间歇试采生产井的地层压力分布及井底流压变化规律；
The rule of reservoir pressure distribution and bottom hole flowing pressure alteration of a periodic trial-produce well in infinity subterranean formation.
结果表明，不同角度圆锥口模挤出过程中，熔体在收敛流道受到拉伸流变，导致强烈的入口弹性效应，表现出熔体在不同角度圆锥口模挤出时有不同的挤出胀大比。
The results show that the extensional flow of melt in convergent die results in intense entrance elastic effect and distinct extrusion swell in conical die with different angles.
通过156口调整井钻井试验，对比分析了刮刀钻头和牙轮钻头的钻进特性、牙齿磨损特性、井底流场特性及钻井效果。
Through drilling experiment in 156 adjustment Wells, the drilling behaviors, cutter wear, downhole jet flow field and drilling effect of drag bits and roller ones were comparatively analyzed.
采用人工神经网络方法预测了受模口温度和挤出流率影响的型坯成型阶段的膨胀。
Neural network method was used to investigate the parison swell affected by the die temperature and extrusion flow rate.
对纯水液压锥阀阀口流场气穴进行了数学建模，并用FLUENT软件进行了仿真分析，从而得到气穴发生的程度与流场压力分布之间的关系。
The flow field cavitation inside the water hydraulic poppet valve was modeled and analyzed by using the software of FLUENT, and the relation between the cavitation and the pressure was investigated.
分叉口左尖点附近的流场中出现了复杂的旋涡结构、未反应区及激波与旋涡作用。
Complex structures of vortices, the unreacted region, and shock-vortex interaction are observed in flow field around the left corner.
对内河挖入式港池发生淤积的原因进行分析，认为淤积主要是由口门处的回流及浑水异重流引起的。
Based on the analysis of the reason of sedimentation in dig-in basins, it is considered that sedimentation is brought primarily by circumfluence at the basin entrance and density flow.
经典成核理论假设气泡核的形成是在静态条件下发生的，它没有反映在口模流场中动态因素(拉伸、剪切等)对气泡成核的影响。
Because classical nucleation theory supposes that bubble formation is occurred under static state, it doesn't reflect the effects of dynamic factors on bubble nucleation, such as shear and elongation.
本文主要针对径向浓淡旋流煤粉燃烧器中心扩口存在的磨损问题在一单相实验台上对燃烧器喷口结构进行了冷态优化实验。
In this paper, the abrasion of central division cone in the radial dense-thin swirl pulverized coal burner is studied by a cold optimize experiment carried at a single-phase experimental platform.
目的研究左房内径、二尖瓣口面积、二尖瓣返流对左房血栓形成的影响。
Pupose To study the influence of left atrial diameter, area of mitral orifice and mitral regurgitation on thrombosis in left atrium.
介绍了用斜流和斜流效应的特征量来分析口门区的通航水流条件及其优化改善措施。
Employing the characteristic values of the oblique flows, the navigation flow condition and optimized improvement measures are analysed.
超声心动图显示心包积液，瓣口返流，右心增大及肺动脉高压，左室收缩功能变化；
Pericardial effusion, valvular regurgitation, right cardiac enlargement and pulmonary hypertension, changes in left ventricular systolic function were observed by echocardiogram.
对比不同扩口结构下的流场，发现安装一定结构的缩放扩口可以更好地促进燃料稳定、高效、清洁燃烧。
The research results show that the said burner can organize a rational aerodynamic field and have a comparatively good adaptability to load changes.
目的探讨二尖瓣狭窄伴反流的患者用压差减半时间(pht)法测量二尖瓣口面积的应用价值。
Objective To explore the clinical application of pressure half-time (PHT) method on rheumatic mitral stenosis coexisting mitral regurgitation.
将表征值方法用于衣架式口模和吹塑模头的缝型截面流道分配系统的分析计算。
The method of representative values is employed to analyze and calculate the manifold distribution systems with slit cross_sections of sheets and annular parisons respectively.
第五道限域十级宇宙共振光终于把勇猛打飞，而我自己也被青光打着口流鲜血。
The fifth confined tenth level universal resonated light finally beats the Fierce flying, however I am also hutted to have the mouth blood by the blue light.
对玻璃池窑池壁、小炉口、流液洞、加料口等处的电熔锆刚玉砖侵蚀特征进行了研究。
This paper researched the corrosion features of the fused zirconia corundum blocks which fixed in the tank wall, port mouth, throat, dog house of glass tank furnace.
容量最大的造模法，通过高压的作用材料从外部加热室通过铸口、流道或浇口进入闭式压膜室。
The highest volume molding method, in which the material is forced from an external heated chamber through a sprue, runner or gate into a cavity of a closed mold by means of high pressure.
容量最大的造模法，通过高压的作用材料从外部加热室通过铸口、流道或浇口进入闭式压膜室。
The highest volume molding method, in which the material is forced from an external heated chamber through a sprue, runner or gate into a cavity of a closed mold by means of high pressure.
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