查询词典 logarithmic

Field data of pedestrian flow was collected in Chinese comprehensive passenger transport terminal—Xizhimen underground station using video recording, and then selected and analyzed by statistic analysis software SPSS. Parameters relation models for pedestrian flow on different terminal facilities were established based on data statistics. The results show that the pedestrian flow-density relation model is quadratic equation in corridor; the flow-space relation model is quadratic equation when space is below a certain value and is logarithmic equation when space is above the value; the speed-density relation model is linear equation. The models on stairs show the similar characteristics, but the eigenvalue is different.

对国内综合交通客运枢纽——北京西直门地铁站行人流数据进行视频采集，采用统计分析软件SPSS对行人流参数数据进行筛选及拟合分析，建立了不同设施的行人流参数关系曲线及函数模型，研究结果表明，水平通道处行人流量与密度呈二次函数关系、流量与空间在某一临界点两侧分别呈二次函数及对数函数关系、速度与密度呈线性关系，楼梯处与之相似但特征点数值存在差异。

Results showed that enzyme activities were significantly different, urease activity: park＞school＞residence＞industry＞road; phosphatase activity: park＞industry＞school＞residence＞road; invertase activity: residence＞park＞industry＞road＞school; But the dynamic patterns of SOC mineralization from different functional areas were similarly, the rate of SOC mineralization decreased quickly at the beginning, and then decreased slowly during the middle incubation time, and keep relatively constant during the later incubation time, and fitted to logarithmic equation with incubation time.

结果表明：不同功能区土壤酶活性差异显著，脲酶：公园＞学校＞居民区＞工厂＞道路；磷酸酶：公园＞工厂＞校园＞居民区＞道路；转化酶：居民区＞公园＞工厂＞道路＞学校；但不同功能区土壤有机碳矿化过程动态表现出相同规律，在培养前期有机碳矿化速率迅速下降，培养中期缓慢下降，培养后期保持相对稳定的趋势，有机碳矿化与培养时间符合对数关系；整个培养期内，土壤有机碳矿化速率及累计矿化量公园＞工厂＞道路＞学校＞居民区。

This paper proposed a secure proxy signature scheme based on the security of logarithmic problem and one-way function.

基于离散对数问题和单向函数的安全性，提出了一个新的安全的代理签名方案。

Definition of the Natural Logarithmic Function ...

自然对数函数之定义推导得。。。

The techniques may exploit properties of a logarithmic function to reduce the memory requirements needed to implement lookup tables.

该技术可能利用对数函数的性质以减少实现查询表需要的存储要求。

The average time for hydrate crystallization of the water droplets' population was represented as a logarithmic function of the inverse of absolute temperature.

的平均时间为水合物结晶的水滴'人口的代表作为一个对数函数的逆绝对温度。

However, if the evaluation length is too short, the structure function logarithmic value of surface profile is scattering.

评定长度也基本上不影响分形维数的大小，但是当评定长度过小时，轮廓曲线的结构函数双对数坐标图会出现离散化现象。

On the base of it,literature [26]、[27] introduced Euro-pean option pricing with logarithmic utility and power utility function which isadopted by the agent.

在此基础上文献[26]、[27]介绍了不完全信息情况下，代理人的效用函数分别是对数效用函数和幂函数时的欧式期权定价公式。

The experimental datafitting shows that the relationship between relative permeability coefficient Ke and Kr is a logarithmic function .

经试验数据拟合，表明相对渗透系数Ke与Kr之间存在对数函数关系。

However, it reduced as sliding speed increased. Plastic deformation of stainless steel with testing duration followed A logarithmic function.

不锈钢试样在试验过程中的变形量与时间之间存在对数函数关系，且其摩擦中心区域的塑性变形大于端部变形量，其磨损机理以黏着磨损和磨粒磨损为主。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。