直径比

以病理诊断为标准，Itoh评分法、面积比和直径比的诊断准确率分别为83.87%、88.71%和80.65%。

The accuracies were 83.87 % , 88.71 % and 80.65 % , respectively for Itoh scoring system , area ratio and diameter ratio .

双级钻头的导眼体与钻头的直径比存在最优值，最优直径比为0.7～0.8。

Its optimum diameter ratio of pilot to enlarger is 0.7 ~ 0.8 .

健康成人主肺动脉-主动脉直径比的多层螺旋CT测量

The Measurement of the Ratio of Main Pulmonary Artery to Aortic Diameter with Multi Detector Spiral CT in Chinese Healthy Adults

研究表明用密度泛函理论预测的不同膜面电荷密度和不同离子直径比情况下离子在半透膜附近密度分布与MonteCarlo模拟数据符合得很好。

The ionic density profiles predicted by the density functional theory are in excellent agreement with Monte Carlo results for various membrane surface charge densities and ionic diameter ratios .

随着围压Pw的增加，有效靶距与喷嘴直径比Sv/d呈指数衰减。

With the increase of ambient pressure , the valid stand-off distance ( Sv ) is exponential attenuation .

雌性EE组海马结构内有髓神经纤维的平均直径比SE组减少了5.2%，但两组之间不存在显著性差异（P0.05）。

Then mean diameter of the myelinated fibers in the hippocampal formation of EE female rats was decreased by 5.2 % when compared to SE female rats , but the difference was not significant ( P0.05 ) .

术后7个月进行尺神经肌电、再生有髓纤维数与截面积、髓鞘厚度（mt）和轴突/纤维的直径比（d/D）及肌肉组织学的检测。

The number of regenerated myelinated nerve fibers and its cross sectional area , the thickness of the myelin sheath ( mt ), the ratio ( d / D ) of axonal diameter ( d ) to total fiber diameter ( D ), and muscle histology were analyzed .

结果：诱导后绿脓杆菌对CPLX纸片法的平均抑菌直径比诱导前小11mm，对于IMP和AMK纸片法，诱导前后的平均抑菌环直径未见变化。

Result : The diameter of mean bacterial inhibition zone after induced by CPLX disk was 11 mm smaller than that before induced , the diameters of mean bacterial inhibition after induced through IMP and AMK disk and that before induced were unchanged .

结论：封堵器直径比球囊测量的房间隔缺损扩张直径大1.0～2.0mm，比超声心动图测量的大2～6mm封堵效果好，成功率高。

CONCLUSION : The diameter of Amplatzer septal occluder device is 1.0-2.0 mm larger than the diameter of ASD measured by balloon , and the effect is better than that of ECG ( 2-6 ) mm with a higher achievement ratio .

根为二原型，直径比后者略小些。

Root is diarch , the diameter lesser than A.obliterata .

锥形光纤两端直径比与数值孔径的关系

The Relationship Between the Taper of an Optical Fiber and Its Numerical Aperture

火星的直径比地球的半径稍大些。

The diameter of Mars is slightly over half that of the earth .

柔性管设计中壁厚直径比的确定

Determining the Ratio of Wall Thickness to Diameter for Design of Flexible Pipes

利用井底应力场研究双级钻头导扩眼直径比

Research on diameter ratio of pilot to enlarger of two-stage bits using bottom-hole stress field

具有不同移植管-宿主动脉直径比的冠状动脉搭桥术的血流动力学仿真比较

Simulation and Comparison of Hemodynamics in Coronary Artery Bypass Graft with Different Graft-Host Diameter Ratio

太阳的直径比地球的直径长多少？

How much is the diameter of the sun longer than that of the earth ?

35×7结构多层股钢丝绳钢丝直径比的计算

Calculation of Steel Wire Diameters Ratio of 35 × 7 Structure Wire Rope with Multiplayer Strands

还对相同直径比的偏心及同心异径管的小端应力集中系数进行了计算。

Furthermore , calculations of stress concentration coefficient for both eccentric and concentric reducers are completed .

太阳的直径比地球直径长一百多倍。

The diameter of the sun is more than one hundred times longer than that of the earth .

猎户座中的一等星的直径比我们整个太阳系直径的四分之一还要大。

The diameter of the star Betelgeuse is more than a quarter the size of our entire solar system .

切割指数同时随着切割后的直径比和液体粘度变化而变化。

[ 4 ] The trim exponents vary with the fluid viscosity and impeller diameter ratio at same time .

主干动脉/分支动脉的直径比增大（21.8%）；

The ratio of diameter of the major pancreatic artery to that of its branches increased ( 21.8 % );

这套更正式一点，并且盘子更大，直径比那个大一英寸左右。

This set is a little more formal and the plates are bigger , about an inch larger in diameter .

叶轮切割指数与直径比的确存在着某种关系，也就是切割指数随着切割后的直径比的变化而变化。

There is a relationship between the trim exponents and impeller diameter ratio , namely the exponents vary with the ratio .

因素有上下轧辊直径比、压下率、导入角和轧辊转速。

These factors include ratio of upper and lower roll diameter , reduction ratio , enterance angle and roll rotation speed .

床层与颗粒直径比小的固定床反应器径向空隙率分布

Magnetic proximity logging tool Radial Distribution of Voidage in a Fixed Bed Reactor with Lower Diameter Ratio of Bed to Particle

通过摘心、整枝、抹芽、疏蕾等植株调整，花序直径比对照增大了138%，单花重量比对照提高了141.4%。

Through regulations as removal , training , shoot erasing and distance , 138 % increase of anthotaxy diameter than the contrast .

同一公羊雄性后代的绒直径比雌性后代平均高0.51μm；

The average down diameter of one buck ′ s male progenies was 0.51 μ m higher than that of its female progenies .

实验组小鼠肝脏虫卵肉芽肿平均直径比对照组分别下降35.23%和46.13%。

Compared with control group , the average diameter of egg granulomas in liver of immunized mice reducted 35.23 % and 46.13 % respectively .

通过在拉锥过程中控制组合波导的不同直径比，可以得到不同分束比的宽带耦合器。

A wavelength-flattened coupler with different splitting ratio can be obtained by controlling the diameter ratio of two coupled arms in the process of fabrication .