分布

It assumes survival time follow exponential distribution and quality of life initial value follow beta distribution. In order to correlate present quality of life with former quality of life, each quality of life were evaluations generated from AR(1) model. In addition, we set parameters of AR(1) model between 0 and 1, calculates expected QAST from different parameter combinations.

假设存活时间服从指数分布、生活品质初始值服从Beta分布，并利用时间序列一阶自我回归过程First-Order Autoregression Process， AR(1的模型产生各次生活品质评量值，使当次的生活品质与前一次的生活品质产生相关性，并将AR(1)模型中的参数设定为介於0与1之间的值，且产生不同的组合。

Beta distribution ; significant wave height ; logarithm-Beta distribution ; nonlinear

Beta分布；有效波高；对数-Beta分布；非线性

The performance of EFT is investigated, which indicates that time-frequency distributions using single-sided window could not accurately trace the variation of the instantaneous frequency, since their performance depend only on the history of the signal, so they are biased frequency estimator.

提出了基于对称阵元互Wigner分布平均的瞬时频率估计算法，这种方法利用多通道数据对时频分布的瞬时频率估计方法的性能进行了有效的改善，并且能够在低信噪比的条件下获得良好的估计效果， 6。

Taking beam with rectangular section as an example, the corresponding analytical solution of beam subjected to cosine distribution pressure is given through constructing the stress function satisfying all boundary conditions and biharmonic equation , which is a base of beam subjected to arbitrary distribution pressure.

以矩形截面简支梁为例，通过构造一个满足所有边界条件和双调和方程的应力函数，给出了梁受余弦分布力作用情况下相应的解析解，这为求解梁受任意分布压力作用下解的问题打下了基础

Based on three dimensional transient heat conduction equation and elastic stress-strain equation, the temperature rise, distortion and equivalent stress distribution of white bijou window irradiated by high power annular beam (λ=1.315 μm) are simulated using a three dimensional finite element model.

基于三维瞬态热传导方程和弹性应力－应变方程，研究了空心环形强激光束（波长1.315μm）辐照下白宝石窗口温度、变形和应力的分布规律；研究了空心矩形强激光束（波长3.8μm）辐照下氟玻璃窗口温度、变形和应力的分布规律。

This distribution, then, has two modes called a bimodal distribution

这种分布有两个众数，叫做双峰分布。

The variability of threshold values for PTC is interesting because its threshold distribution is bimodal.

因为它的阈值分布是双峰的。换句话说，它的敏感性分布于两个相差很大的群组中。

Although older patients are at increased risk, the frequency of steroid responsiveness with age may occur in a bimodal distribution.

尽管年龄增大会使发病风险增加，但是类固醇敏感患者的年龄分布会呈现出双峰分布。

In addition, there will be bimodal distribution for time series if there is a linear trend, but it doesn't change the probability distribution of differences of scalars.

同时，也发现，线性趋势的存在会使原变量的概率分布出现双峰，但是不会影响变量差的概率分布。

The effectivity of Bayesian statistical method on the estimation of bimodal distribution is shown by numerical simulation.

较详细介绍了贝叶斯统计方法在海浪方向谱估计中的应用，指出先验分布的不同对估计结果没有影响，由于均匀分布与最大熵原则相对应，使其具有某种特殊性。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。