对数

Please plotting the logarithm of the DNA fragment sizes versus the migration distances on the plotting paper below, and calculate the sizes of the DNA fragments.

请以DNA片段大小的对数对移动距离作图於所附的作标图中，并计算DNA片段的大小。

In order to reconstruct them accurately, a method for fitting the ellipse based on the principle of conditional least square was applied at first, and then its fitting result was used as an initial value to find a more precise result according to the polar line geometrical properties of the ellipse.

为了实现精确建模，本文首先运用一种基于带约束的最小二乘方法对数据点进行拟合，然后用拟合的结果作为初值，根据椭圆的极线性质进行更精确地求解。

Because of its easily calculating and its accurately description parametric method has became mainstream in study field, polynomial hazard function distribution model was a large class of parametric models, when the dates are not readily handled by one of the common models such as exponential distribution or Weibull distribution, polynomial hazard function model always be used to provide adequate fits of the dates.

随着该学科的发展，大量参数、非参数方法相继提出，特别是生存分析的参数方法，以其处理简便、描述准确成为生存分析研究的主流方向。多项式危险函数模型是参数模型中的一大类，当一批数据不能用熟知的一些分布，诸如Weibull分布、对数正态分布进行很好的描述时，常常使用多项式危险函数模型。

This polynomial expansion based algorithm is then integrated with the Logical Key Hierarchy; while preserving the logarithmic communication cost with the group size, the presented PE-LKH scheme lowers the computation complexity observably, thus is scalable to large dynamic groups.

将基于多项式展开的该算法与逻辑密钥层次结合，又提出了一种PE-LKH方案，在保留通信开销随组规模呈对数增长的同时，其计算复杂度有效降低，可适用于大规模动态群组。

This paper introduces a time series model whose determined trend is polynomial and errors are autocorrelated and heteroscedastic as sunspot series model.

用确定性趋势与残差服从条件异方差模型的自回归模型组合，作为太阳黑子相对数的数学模型。

The linguistic knowledge of Putonghua pronunciation was effectively introduced into the calculation of HMM based log posterior probability.

新算法在隐马尔科夫模型的对数后验概率算法基础上，引入普通话发音的语言学知识。

In prime number distributed research process,and through established one kind of new sieve method and the stair theory,this article obtained about three group of prime number distribution recurrence formula: The 1st is not bigger than x the prime number integer recurrence formula;The 2nd is not bigger than x the twin prime integer recurrence formula;The(3rd Recurrence) formula.

在研究素数分布过程中，通过创立一种新的筛法与台阶理论，得到关于素数分布的三组递推公式：不大于x的素数个数与孪生素数对数量的递推公式；不大于x的孪生素数个数的递推公式；任意偶数x≥6表为两个奇素数之和与孪生素数对数量对数的递推公式。

On the dose-response curve, 4or 5 well-spaced points were obtained for probit analysis to determine CD50 and LD50 of each agent.

使用Probit法将量效曲线直线化，建立3种局麻药的对数剂量一概率单位的回归直线方程，确定各自的量效关系。

The first adjustment was to replace logarithm function by S function for modeling the inner hair cells in cochlea,and the other was distributing frequency bins on frequency axis with the width of frequency bin proportionably increasing.

利用S函数取代对数函数对耳蜗内毛细胞进行模拟，将频率箱按照频率范围等比递增的方式在频率轴上进行分布；同时，利用Gammatone滤波器组进行耳蜗基底膜的建模。

The first adjustment was to replace logarithmfunction by S function for modeling the inner hair cells in cochlea,and the other was distributing frequency bins on frequency axis with the width of frequency bin proportionably increasing.Furthermore,the basilar membrane was modeled by Gammatone filterbank.

利用S函数取代对数函数对耳蜗内毛细胞进行模拟，将频率箱按照频率范围等比递增的方式在频率轴上进行分布；同时，利用Gammatone滤波器组进行耳蜗基底膜的建模。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。