查询词典 variance

It is shown that including current trading volume in the conditional variance equation of EGARCH model dramatically reduces the persistence of the conditional variance, meaning that the current trading volume is a good proxy variab...

在EGARCH模型条件方差方程中加入当前交易量可以显著降低条件方差波动的持续性，表明当前交易量可以代表引起收益率 ARCH效应的新信息。

It is also found that the conditional variance and jump frequency are time varying. Furthermore, both permanent and transitory components of the conditional variance really exist in the whole sample period.

此外，各国股价指报酬的条件变、跳跃强都是随时间而变动的，并非固定变，且随时间变动的跳跃强对於各国股价指报酬的解释非常显著，符合资产报酬的为。

The the probabilistic forecasting method of the error between the sample mean and expectation value of the random variable utilizing the central limit theory was researched, then the mathematical formula for the relation between sampling size and variance coefficient of loss of load probability was analyzed. Furthermore, the formulas for the relation between confidence intervals of variance coefficient and sampling size are deduced.

基于中心极限定理深入研究随机变量的样本均值与期望值之间误差的概率预测方法，在此基础上分析失负荷概率(loss of load probability，LOLP)指标的方差系数和样本容量之间的关系表达式，导出方差系数给定时的样本容量置信区间公式及样本容量给定时的方差系数置信区间公式。

Based on censored data, a smoothing estimation method is proposed to estimate the parameter functions. Moreover, a consistent estimator for the asymptotic variance matrix of the estimators is provided. The limiting distribution of estimated functions and the estimator of variance matrix enable us to construct approximated regions.

根据截切资料，我们提供平滑估计法以便估计参数函数，接著，我们也对估计函数的变异矩阵提出一个估计式，利用估计式的常态分配逼近，其相对应的信赖区间建构法也被提出。

Analysis the reason for cost variance ＆ purchasing variance on time.

及时分析成本，物料采购差异的原因。

Analysis of variances When a cost variance occurs, the person in charge should examine the variance to determine the factors that may have caused it.

差异分析当成本发生变化时，负责成本的人须查验此差异变化，并找出导致该变化的因素。

The main findings were as follows: 1. The results revealed that the conjunction of agreement and inconsistency among family members was found in a family. The phenomenon showed that in " the sameness has the differentness" and between "the differentness has the sameness", and it is the special result of system measurement. 2. It proved the system theory including "one adding one are not two", existence of subsystems. 3. Every family member has different perception to the same dyad relationship, so the subject should use the units of whole family, including father, mother, and one child or more. 4. The same members of this family had different perception to different dyad relationship, so the content of instrument should include different dyad. 5. In regard to analyzable methods of family system, the variance is between family members, and it is not adaptation to using average method and variance method.

主要结果包括：第一研究姿现成员问同时具备「一效性」与「不一致性」的现象，此种「同中有异」、「异中有同」的特性，反映出系统圳量时的独特之处；第二，验证家庭系统中的不等加性、家庭整体性并不能成功的被验证，但验证次系统的存在、以及验证次系统之问具有关连性等系统理论；第三，在划量对象上，结果姿现不同成员间的差异的确存在，故进行家庭系统测量之测量单位应以「整个家庭」为单位，故划量对象应包括父、母、子三者甚至更多，所获得的资料亦更接近系统性也更加丰富；第四，不同成员对於不同次系统知觉之分化内涵不同，故必须将不同次系统分开利量；第五，在家庭系统分析方法上，不同成员问观点之差异性是确实存在的，而不适合使用「平均数法」与「差异数法」处理系统资料。

Then the influence of stochastic observation error on different model for environment evaluation in two cases, namely uniform variance and nonuniform variance, is investigated using Monte Carlo method.

水环境评价是防治水污染的前提和基础，也是进行水质规划的依据。

Thus s2 is also the unconditional variance, called the error variance

因此 s2 也是无条件方差，被称作误差方差

Secondly this dissertation made the statistical analysis of brittle ice load, and results showed that there was a greater variance of ice load during slow ice speed movement and a smaller variance of ice load during fast ice speed movement.

其次对冰脆性破坏时的荷载进行了统计，结果显示当冰速较慢时荷载的变化较大，而当冰速较快时荷载的变化较小。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了