自然对数

Through the discussion of computing formula for measuring high resistance by Mdoel NG82-1impact corrent galvanometer, it is discoverde that it is much casier to do calculation by natural logarithm .

通过对NG82－1型冲击电流计测高阻计算公式的讨论，找到用自然对数计算较为方便。

As a solution, a new gray-level value natural logarithm ratio range filter kernel is pointed out for the Bilateral filtering, a representative method of Neighborhood filters.

在此基础上针对具有代表性的双边滤波模型进行修改，提出新的灰度值自然对数比率相似函数模型。

The results indicate that the amount of chloride ion sedimentation is attenuated by the natural logarithm function of distance from external surface of the sample,and the corresponding attenuation rate is changed greatly by the ratio of water to cement and mineral admixture such as slag. Chloride ion is mainly deposited in surface zone under dry-wet cycle condition.

试验结果表明：混凝土内部不同位置处水溶性氯离子的沉积量与离表面的距离之间存在自然对数的衰减关系，且混凝土的水胶比和矿渣等因素对其衰减速率存在较大的影响。

The exterior variables such as the degree of government intervene, the degree of law and regulations, local credit, the enterprise prestige variables (natural logarithm of company asset, current ratio, speed ratio, net profit per share) are remarkably negative related to social moral risk behavior.

2企业外部变量中的政府干预程度、法治水平、地区信用、企业声誉变量(公司资产的自然对数、流动比率、速动比率、每股净利润)对企业道德风险行为的产生存在显著的负相关关系。

Methods At first, the relationship of linear or non-linear between dependent X and independent Y in original data can be distinguished by scatter diagram which can be made through Excel software.

方法通过利用Excel可绘制散点图的功能，了解原始数据自变量X和因变量Y间的线性与非线性关系，并由自变量X和因变量Y的自然对数转换后的散点图的情况，决定采用何种曲线拟合。

Methods At first, the relationship of linear or non-linear between dependent X and independent Y in original data can be distinguished by scatter diagram which can be made through Excel software. The scatter diagram of log- arithmic transformation between dependent X and / or independent Y decides which curve to be fitted.

通过利用Excel可绘制散点图的功能，了解原始数据自变量X和因变量Y间的线性与非线性关系，并由自变量X和因变量Y的自然对数转换后的散点图的情况，决定采用何种曲线拟合。

Patients with a body mass index≥25㎏/㎡ and patients with cardiac cachectic, hypertension, diabetes, hyperthyroidism, hepatorenal disease, cerebral vascular disease, pulmonary embolism ,malignant tumor ,connective tissue disease and infective disease were excluded from the study.

空腹血糖采用氧化酶法测定；应用ELISA法测定血浆leptin、INS及TNF-α水平；胰岛素抵抗指数为FPG与空腹血浆胰岛素的乘积除以22.5，然后取自然对数，即Homa-IR=㏑（FPG×FINS/22.5）；应用改良Simpson法测定LVEF。

To evaluate the vascular response in relation to baseline, adjusting for systemic effects and skewed data, we expressed the hyperemic response as the natural logarithm of the ratio of postdeflation to baseline pulse amplitude in the hyperemic finger divided by the same ratio in the contralateral finger that served as control.

为了评价血管反应性与基线血管反应的关系，校正全身性作用及偏离的数据，我们计算袖套排气后充血手指脉搏幅度与基线脉搏幅度的比率以及对侧作对照手指的脉搏幅度与基线脉搏幅度的比率，两比率之比取自然对数表示充血反应。

In order to offer the reference of small stream management project of the Dou-zih-pu creek in the future. We get the changing amount presents positive correlation with AOD value to the proportion or area of plant, and it is a Napierian logarithm curve.

在水质和植生比例及面积的相关性分析中，得知植生的面积或比例皆与AOD值变化量呈现正相关，而且是一自然对数曲线的关系，也就是当植生在河道中的比例或面积越高时，净化效果会越高，但最终将达到饱和。

The number of nepers is the logarithm of the ratio of the measured power levels.

奈培数等于所测的电平功率与参考电平的比值取自然对数。1奈培等于8.686分贝。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。