查询词典 logarithm

In order to improve the effects of flume on its flow pattern at the tail gate,through analyzing of the influence of several commonly-used tail gates upon their flow patterns at their tail segments, and combining the formula of logarithm velocity distribution and that of free discharge from small orifices, a formula of calculating orifice diameter in a new inclined dragging tail gate is deduced.

为了改善水槽尾门对水槽尾部流态的影响，从几种常用水槽尾门对流态影响的分析入手，结合明渠流速分布对数公式和小孔口自由出流公式，并根据分层来流量与孔口出流量相等的原则，推导出一种新型斜拉孔板尾门开设孔径的计算公式。

Concerning with the selection of the ways of calculation the thesis indicates all of them including layerwise summation method, double curve method and logarithm curve method can meet the demands of the projects.

在研究课题对于计算方法的选择，认为分层总和法、双曲线法和对数曲线法均能满足工程需要。

Its security is based on the security of Shamir's threshold scheme and the intractability of discrete logarithm problem.

方案的安全性基于Shamir门限机制和离散对数问题。

Moreover, their mass fractal dimensions Df, calculated by bi-logarithm relation between setting rates and equivalent circle diameters, were 2.0972.801, and the Df value for granules in the 5th compartment was the highest one among them, indicating that the most compact granules were formed. The least compact granules were observed in the 4th compartment, and the granules in the 1st and 2nd compartments show close compactness. However, the highest average setting rate for granules was detected in the 1st compartment.

依据沉降速率-当量圆直径的双对数图计算出的各格室中颗粒污泥的质量分形维数Df处于2.0972.801之间，大小顺序为：第5格第3格第2格第1格第4格，表明第5格室中形成的颗粒污泥较为密实，而第4格室的密实程度最小，但密实的颗粒污泥并不一定意味着较高的平均沉降速率。

The simple beam is simulated numerically, and its modal displacements of different damage conditions are analyzed by Mexican wavelet transform, and we can get the maximum coefficient modulus of 1-6 scale, from the logarithm of which Lipschitz exponent curve is obtained, and we can find that different extent of the damage match with different Lipschitz exponent.

通过对简支梁进行数值模拟分析，对其不同损伤的模态位移进行Mexican小波变换，提出其1-6尺度的小波变换系数模极大值，通过其对数曲线我们可以得到其Lipschitz指数曲线，从中我们可以看出不同损伤程度对应了不同Lipschitz指数。

Using the relative reflection as weighting factor, the weighted mean of the surface albedo over Dunhuang Gobi in typical arid region is calculated and its values are 0.255 ± 0.021. After canceling the interference of the buildings, the mean values of the roughness length averaged with logarithm is 0.0019 ± 0.00071 m. After removing the influence of the oasis, the soil wetness factor computed with data under condition of no precipitation is 0.0045. After removing the influence of the precipitation .the mean values of the soil heat capacity over Dunhuang Gobi in typical ac-id region is 112 × 10 ~6 m~(-3)K~(-1), a bit smaller than the values observed i n HEIFE. But the soil heat diffusivity and conductivity are about one of those observed in HEIFE. The soil water content over Dunhuang Gobi in typical synoptic condition is very little and does not exceed 1% basically.

并且利用相对反射为权重加权平均，计算得到典型干旱区敦煌荒漠戈壁的平均反射率为0.255±0.021；剔除建筑物干扰后，利用对数平均法计算的粗糙度长度平均值为0，0019±0.00071 m；剔除绿洲影响后，用无降水影响的资料确定出土壤湿度影响因子为0.0045；剔除降水影响后，用观测资料计算的敦煌典型干旱区荒漠戈壁的热容量平均值为1.12×10~6m~（－3）K~（－1），比&黑河试验&在戈壁和在其它沙漠观测的有关值略小一些，但热扩散率和热传导率都比&黑河试验&在戈壁观测的值小一倍左右；观测的敦煌戈壁典型天气条件下的土壤含水量非常小，基本上不超过1％。

Study of contrast sensitivity of the human eye shows that logarithm curve obeys the Weber-Fechner law of just noticeable difference response in human perception.

关於寻找最小有效剂量的统计方法，一般而言，会先确定所采用的检定统计量，再依据封闭降阶的方式侦测最小有效剂量。

Nigra during the experiment. Successfully established the transformation procedure Agrobacterium-mediated of Populus simonii×P nigra: cut vigorous leaves to 2-3 patches through the main vein after growing about 20 days, pre-culture time was 3~4days;centrifuge Agrobacterium when being developped to the logarithm growth timeOD_(600=0.5, then dilute Agrobacterium to the concentration of OD_(600)=0.3-0.4 with MS liquid culture medium or asepsis distilled water for infection;infection time was 6-15 minute;after being co-cultured 3 days, inoculate on the selecting medium to be filtrated in succession during inducing unsureness buds and rooting with Kanamycin(containing Kanamycin 40mg/L and Cefazolin Sodium 700mg/L).

成功摸索出农杆菌介导的小黑杨遗传转化体系：选取生长20d左右的健壮的小黑杨组培苗叶片，通过主叶脉剪2～3下，预培养3～4d；将培养至对数生长期的农杆菌OD_(600=0.5离心后用液体MS培养基或无菌蒸馏水稀释成OD_(600)=0.3～0.4浓度，进行浸染；侵染时间为6～15min；共培养3d后，转入到筛选培养基中进行诱导不定芽及生根阶段的卡那霉素连续筛选(含有40mg/L卡那霉素和700mg/L的头孢唑林钠)。

In this paper, the requirement analysis, design and implementation of the system are introduced in detail.

此论文详细介绍了系统的需求分析，系统设计和具体实现。

In the context of economic globalization is increasingly deepening, China's economy can not be spared.

在经济全球化日益加深的背景下，中国经济不可能做到独善其身。