查询词典 marginal distribution density function

Secondly, we improve Minimum Semi-variance Model with fitting the joint probability density function of rate of return between futures and spot prices based on wavelet density estimation method for improving goodness of fit for the first time.

其次，为提高估计的精度，对最小半方差模型提出了进一步改进，首次引入小波密度估计的方法拟合期现货收益率的联合密度函数，并与经验和正态核密度估计方法进行了比较。

Facing the requirement of detecting CO gas density in public place＇s and related workrooms produced by hygiene epidemic prevention and labor hygiene protection departments, this paper gives a kind of design scheme of low power consumption of CO gas density monitor with GSM short messages receiving and transmitting function.

针对卫生防疫和劳动卫生保护部门对公共场所及有关生产车间CO气体浓度监测要求，给出了一种具有GSM短消息收发功能的低功耗CO气体浓度监测仪设计方案，降低了监测仪功耗的同时，也延长了电池的供电周期。

This paper introduces a novel technique for estimating the signal power spectral density to be used in the transfer function of a microphone array post-filter.The technique is a modification of overestimation of noise power spectral density of the existing Zelinski post-filter and McCowan post-filter,which utilize the auto- and cross- spectral densities of the signals.Near-field compensation is taken into account.

介绍了一种用于近场麦克风阵列后滤波语音增强的方法，避免了现有的利用自功率谱密度和互功率谱密度的Zelinski和McCowan后滤波器中噪声功率谱过估计的问题，并加入了近场传播的幅度衰减补偿和相位延迟补偿。

On the basis of user requirements can be Timbuktu installed intelligent electronic structure, with arbitrary density and weft weft density compensation function.

可根据用户要求安装电子智能提布结构，具有任意设定纬密度和纬密度补偿功能。

Results indicated that aphids fed on fresh bamboos by aggregately distributing, and their predators in bamboo forests were separately collected in different parts, main of which were in accord with negative binomial distribution and Polya-Eggenberger distribution, it was proved that some natural enemies in some sample sites were spraying extensively from single plot to around places, the population density of bamboo aphids was proved to be stable in a regular time.

在竹林中主要符合负二项式分布和 P-E 核心分布，为不均匀的聚集分布，存在由点片向四周扩散的现象，频次分析和聚集度指标的分析结果基本一致，其中瓢虫的聚集程度不及另外2种天敌的明显。

The asymmetrical distribution of temperature and fuel component affects the distribution of current density.

温度和燃料组分的非均匀分布直接影响了电流密度的分布。

Secondly, through on-site and laboratory testing, studies the impact of root distribution density and distribution methods to root complex shear strength.

根系的抗拉特性符合一定的规律，对进一步研究根系的拉拔特性奠定基础。

Using assumed explained variable condition, applying the maximum entropy principle and with the condition probability distribution complying with that of sample data and prior distribution, the author finally estimates an optimal conditional probability density of the LGD.

利用假定的解释变量条件，应用最大熵原理，并要求所估计的条件概率分布一致于样本数据和先验分布，最终对违约损失率估计出最佳的条件概率密度。

Rinted-circuit board air-core coils designed by using CAD tools and fabricated by adopting advanced PCB manufacturing technology are good in measurement accuracy and consistence of products parameters. But the characteristics of limited turns-density and large magnetic induction intensity grads on coil cross-section make great influence on the continuous uniform distribution of coil turns along the coil circumference and cause its discrete distribution.

CB空心线圈采用CAD方法设计和先进的PCB加工工艺制造，具有很好的测量精度和参数一致性，但是，线匝密度较小，而且截面上磁感应强度梯度较大，从而影响了线匝沿圆周均匀分布的连续性，使其具有了离散分布特征。

The comparison with conventional coplanar PDP has been made.The electric field distribution and the density distribution of particles at different time have been given.

给出了不同时刻两种结构放电单元中电场、各种粒子浓度的空间分布以及各种粒子的平均浓度随时间的变化关系。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。