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1)  face ratio
面比
1.
Based on the existence of the chemical phases of Zn_3(PO_4)_2·4H_2O,area integrals or intensities of the Zn_3(PO_4)_2·4H_2O phase from the faces of(020)and(241)are obtained and face ratio of phosphide tunica of the samples can be calculated.
利用X射线粉晶衍射仪对金属板材及其磷化膜进行全谱和分段扫描,在确定镀膜中存在Zn_3(PO_4)_2·4H_2O物相基础上,求出Zn_3(PO_4)_2·4H_2O的(020)晶面和(241)晶面衍射峰积分或强度计数,计算出该样品磷化膜的面比
2)  surface area to volume ratio
比面
1.
This paper used rock-capillary model to simulate the formation pore volume,and derives the variation equation between paraffin precipitation and formation parameters using the correlation among surface area to volume ratio,porosity and permeability,etc.
根据岩石—毛细管模型,以及地层孔隙度、渗透率和比面的关系推导出了石蜡沉积以后的孔隙度和渗透率的变化公式,并通过实例计算证实石蜡沉积以后,地层的孔隙度和渗透率都有不同程度的下降。
3)  surface to surface ratio
面面比
1.
Compactness Analysis of Gasoline Engine Combustion Chamber by Surface to Surface Ratio;
以面面比对汽油机燃烧室紧凑性进行研究
4)  specific sutface ratio
比表面积比
5)  area ratio
面积比
1.
The effect of confluence angle, discharge ratio (ratio of branch pipe discharge to total discharge in main pipe) and area ratio (ratio of branch pipe area to main pipe area) were analyzed.
分析了交汇角、流量比(支管流量/合流量)及面积比(支管面积/主管面积)等因素的影响规律,并对各影响因素进行了分析比较。
2.
By using the semi experiential engineering arithmetic based on the ideology of area ratio, the slope of lift coefficient curve, the zero lift drag coefficient and the induced drag factor of double delta wing aircraft were calculated.
采用基于面积比思想的半经验工程算法计算了双三角翼飞机的升力系数曲线斜率、零升阻力系数和诱导阻力因子。
6)  Specific Surface Area
比表面
1.
The phase state,chemical structure,surface morphology,specific surface areas and mesoporous structure of the synthesized silica- based xerogels were measured systemically by means of X-ray diffraction(XRD),infrared spectrum (FTIR),transmission electron microscope(TEM),and N_2 adsoption-desoption(BET)techniques,re- spectively.
通过X射线衍射(XRD)、红外光谱(FTIR)、透射电镜(TEM)和N_2等温吸附-脱附分析,考察了合成硅基干凝胶的相态、结构、形貌、比表面积和介孔特征。
2.
Catalyst activity was determined by not only specific surface area of catalyst but also the distributions of active center and utilization ratio of internal surface.
实验结果表明:催化剂活性比为不同催化剂单位质量表面上活性中心的总数目N总值的比值;催化剂活性不仅与比表面有关,还与其活性中心分布情况、内表面利用率有关。
3.
A method for measuring the specific surface area and pore volume of ion-exchange resin by N_2 absorption apparatus is introduced.
介绍了用氮吸附仪测定离子交换树脂的比表面、孔容的方法。
补充资料:绿化面积比率


绿化面积比率


绿化面积比率又称绿化覆盖率。反映城市绿化程度的重要指标。计算公式为:市区园林绿地面积+道路绿化覆盖面积市区总面积
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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