logarithm['lɔɡəriðəm; 'lɔ:ɡ-]n.1.■【数学】对数
logarithmlogarithm[ˈlɔɡəriθm]n.1.■【数】对数
[ˈlɒgərɪð(ə)m, -rɪθ-]
(缩略词：log)
noun
- a quantity representing the power to which a fixed number (the base) must be raised to produce a given number
对数 - Logarithms can be used to simplify calculations, as the addition and subtraction of logarithms is equivalent to multiplication and division, though the use of printed tables of logarithms for this has declined with the spread of electronic calculators. They also allow a geometric relationship to be represented conveniently by a straight line. The base of a common logarithm is 10, and that of a natural logarithm is the number e (2.71828 …)
- early 17th cent.: from modern Latin logarithmus, from Greek logos 'reckoning, ratio' + arithmos 'number'
logarithm
■In 1614, John Napier discovered the logarithm which made it possible to perform multiplications and divisions by addition and subtraction.
1614年，蘇格蘭數學家納皮爾發現了對數，使得數字的乘跟除可以加減替代。
■4 is the characteristic of the logarithm 4.7193.
4是对数4.7193的首数。
■7193 is the mantissa of the logarithm 4.7193
7193是对数4.7193的尾数
■Washing hands with 1.8 ml of hand-washing solution A and hand-washing solution L caused reduction of logarithm of count of Serratia marcescens by 2.93 and 2.28 respectively,which fulfilled the eligible requirement.
A洗手液和L洗手液用量为1.8 m l,经洗手后,对粘质沙雷菌的细菌减少对数值分别为2.93和2.28,达到合格要求。
■C#Builder is about to release, borland occupies its logarithm the support of the library, developed acme.
C#Builder即将发布,Borland将其对数据库的支持,发挥到了极致。
■e-th Root of Discrete Logarithm Problem
e次方根问题
■PH value: Self defines the negative logarithm being hydrogen ion concentration.
PH值：本身定义是氢离子浓度的负对数。
■YUAN Yu-ze.Precise asymptotics in law of the iterated logarithm of random fields[J].J of Zhejiang University:Science Edition,2005,32(2):152-155.
[3]袁裕泽.随机场重对数律的精确渐近性[J].浙江大学学报:理学版,2005,32(2):152-155.
■Calculates natural logarithm of an OracleNumber. Natural logarithms are based on the constant e (2.71828182845904).
[本主题是预发布的文档，在将来发布的版本中可能会有更改。空白主题是为将来预留的。
■A subroutine that returns the value of a single variable, and that usually has a single exit, for example, subroutines that compute mathematical functions, such as sine, cosine, logarithm, or that compute the maximum of a set of numbers.
一种子例行程序，它返回一个单独变量值，通常只有一个出口。例如计算数学函数的子例程，像正弦、余弦、对数等，又如求一组数的最大值的子例程。
■It is not possible to obtain the logarithm of a negative number.
不可能的获得负数的对数。
■Furthermore, different from some traditional private mechanism, the cryptological technology is not limited in the discrete logarithm in our mechanism.
与传统的私密交易机制不同，我们的数字产品交易机制加密机制不仅仅是离散对数。
■Compared with classical group signature, the conic analog over Zn has strongly improved the security of computing discrete logarithm.
与经典群签名方案相比较，离散对数问题更加困难，有效提高了方案的安全性；
■Both of their security are based on the intractability of elliptic curve discrete logarithm problem.
两种方案的安全性都是基于椭圆曲线离散对数问题的难解性。
■For example, the cepstrum converts a signal to the frequency domain through Fourier transform, takes the logarithm, then applies another Fourier transform.
为了保证被采样的模拟信号是带限的，通常在采样之前要对它进行适当的带通或低通滤波。
■So the correlations of PFWD and bearing plate, CBR, deflection, FWD are established according to many testing results. The analyses indicate that the correlations are good in double logarithm.
为此,根据大量的试验检测结果建立了PFWD与承载板、CBR、弯沉和FWD检测值之间的相关关系,结果表明各检测值之间存在良好的双对数关系。
■The regression analysis showed the urbanization level of Baoji was positive coorelation with the logarithm of GDP.
人口城市化水平全省排名第四位；
■His first design is for a machine to calculate such thing as logarithm table.
他的最初设计是为机器计算诸如对数表之类的事情。
■The following example returns the result of raising a base-10 logarithm to a specified power.
以下示例返回对以10为底的对数执行指定幂计算的结果。
■The average time interval in seconds is named Drillability Time (DT), and the logarithm of the DT to the base 2-the Drillability Classification Grade (DCO).
以平均钻时(秒)DT为钻时样本,取DT以2为底的对数为可钻性等级(DCG)。
■The logP_(ow) values of 4 pharmaceuticals that are electric neutral measured by this method were close to those determined by shake-flask method, and the average error between values from two methods was 0.15 logarithm units.
以该MEEKC方法对阿昔洛韦、扑热息痛、多沙唑嗪以及氯雷他定4种电中性药物的logP_(ow)值进行了测定，其测定值与采用经典的摇瓶法测得的logP_(ow)值较接近，平均差值为0.15。
■After passage,the pericytes accelerate growing,and come into logarithm growth period on the third day and flat period on the tenth day.
传代培养后增长速度加快 ,第 3天进入对数生长期 ,第 10天进入平台期。
■Here,another scheme based on elliptic curve discrete logarithm problem(ECDLP)wasproposed.
传统的代理签名方案都是基于离散对数问题的。
■As an application of this criterion a result about subsequence principle on iterated logarithm law for the case of Banach space of type 2 is given.
作为这一法则的一个有趣应用,给出了2-型空间情形的一个关于叠对数律的子序列原理的结果。
■The base that using elliptic curves as public key cryptosystem is because of the points set of elliptic curve on finite field can construct Abelian group. By this, the discrete logarithm on elliptic curve can be defined.
使用椭圆曲线作为公钥密码体制的基础是由于定义在有限域上的椭圆曲线上点的集合可构成阿贝尔群 ,由此可定义其上的离散对数 ,即椭圆离散对数 .
■The base using elliptic curves as public-key cryptosystem is that because the points set of elliptic curve on finite field can form Abelian group. By this,the discrete logarithm on elliptic curve can be defined.
使用椭圆曲线作为公钥密码体制的基础是由于定义在有限域上的椭圆曲线上的点的集合可构成阿贝尔群，由此可定义其上的离散对数，即椭圆离散对数。
■The base that using elliptic curves as public-key cryptosystem is because the points set of elliptic curve on finite field can form Abelian group. By this, the discrete logarithm on elliptic curve can be defined.
使用随圆曲线作为公钥密码体制的基础是由于定义在有限域上的椭圆曲线上的点集合可构成阿贝尔群，由此可定义其上的离散对数，即椭圆离散对数。
■Value containing the logarithm of a specified number.
值,此值包含指定数字的对数。
■Logarithm of frequence of every symptom factor was calculated, and then the likelihood possibility ratio of every syndrome, according to which the diagnosis of syndrome was determined.
先筛选出15组47项症状因子并求出各症状因子的频数对数，再计算各证候的似然概率，根据似然概率的大小确定中医证候诊断。
■Optical densety: Light-absorbing capacity of a material. It is repressed as the logarithm of the opacity of the material. In graphic arts, the word "density" is simply taken to mean "optical density".
光学密度:物质吸收光的能力，用不透明度的对数来表示。在印刷方面，‘光学密度’通常简称为‘密度’。参阅密度。
■A little judicious guessing should be done about trace versus determinant, and more generally, about logarithm versus exponential .
关于迹与行列式，以及更一般地关于对数与指数的关系，要进行一些审慎合理的猜测。
■The methods to locate typhoon of intensity model contain mainly the superseding repeated and the counting of logarithm spirl chart of typhoon has some characteristicinformation.
准确及时地确定近海台风中心位置、大风分布等是了解热带气旋活动情况，做好预报服务工作的前提。
■The log() function returns the natural logarithm (base E) of a number.
函数的作用是：返回一个数值的自然对数。
■A unit used to express relative difference in power or intensity, usually between two acoustic or electric signals, equal to ten times the common logarithm of the ratio of the two levels.
分贝通常表示两个声音信号或电力信号在功率或强度方面的相对差别的单位，相当于两个水平的比率的常用对数的十倍
■The computational intractability of the Elliptic Curve Discrete Logarithm Problem (ECDLP) over a finite field enhances security of the scheme.
利用有限域上椭圆曲线点群中的离散对数问题的难解性来增强协议的安全性。
■A unit for measuring power. The number of nepers is the logarithm ( base e ) of the ratio of the measured power levels.
功率度量单位。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。
■A unit for measuring power. The number of nepers is the logarithm(base e) of the ratio of the measured power levels.
功率度量单位。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。
■Step Logarithm Dual LED Display Driver
双五点对数LED电平显示驱动电路
■The number for which a given logarithm stands;for example,where log x equals y,the x is the antilogarithm of y.
反对数，逆对数一个特定对数代表的数字;例如，如X的对数等于Y那么X就是Y的反对数
■The number for which a given logarithm stands; for example, where log x equals y, the x is the antilogarithm of y.
反对数，逆对数一个特定对数代表的数字；例如，如x的对数等于y那么x就是y的反对数
■During the reaction in progress, light of a definite wavelength would emit from the product of oxidation, and the logarithm of its intensity was proportional to the logarithm of the content of Co~(2+) ion.
反应过程中氧化产物会发射出一定波长的光线,其强度的对数与钴离子的含量的对数成正比。
■The other is based on discrete logarithm problem(DLP), like DSA.
另一类是基于离散对数问题的，如DSA数字签名体制。
■The biodiversity of the net-phytoplankton community decreases with the increase of logarithm of the cell abundance value.
另外，网采浮游植物群落的多样性随细胞丰度值的对数增加而降低。
■Motivated by this concern, based on the intractability of the discrete logarithm problem, a new dynamic threshold signature scheme that solves the above problem is proposed in the paper.
可以根据文件的重要性而灵活地选取不同的门限值进行门限签名；
■And the logarithm of head breadth (including length of prothorax, antenna and body) varies linearly with in...
各实测值与理论值的吻合度均较高,其中以头壳的吻合程度最好。
■Under some conditions, it is proved t hat the kernal estimators converges to the regression function at the rate of th e law of the iterated logarithm.
在一定条件下，证明了其收敛速度符合重对数律。
■In information theory, a unit of logarithmic measures of information equal to the decision content of a set of two mutually exclusive events expressed as a logarithm to base two, e.g.
在信息论中,信息的一种对数度量单位,它等于以2为底的对数所表示的一组互斥事件的决策量。
■The natural logarithm of DBH (lnD) and square diameter (D~2) were included in the predicting models of diameter increment for all 15 species.
在全部15个树种的直径生长量预估模型中,均包含了InD和D~2二个变量。
■It is repressed as the logarithm of the opacity of the material.
在印刷方面，‘学密度’通常简称为‘度’。
■In the verified scheme, the respective participants receiving the shares can verify their validity based on the discrete logarithm problem (DLP).
在可验证方案中，基于离散对数问题，各参与者可以检验属于自己份额的共享的正确性。