查询词典 weighted arithmetic average

Comparing with the equal-weighted incidence method, the evaluation of weighted incidence sequence could more accurately reflect many properties such as yield. The selection of control varieties and relative properties is the heart of grey correlative degree analysis.

与等权关联度排序相比，加权关联度排序的评估结果更能反映品种产量等多个性状的实际表现，构造参考品种和赋予不同性状以不同权重是灰色关联度分析法的关键环节。

Methods The schizophrenic patients were recruited according to DSM-IV, and 99 of them whose total weighted score of the Modified Overt Aggression Scale≥4 were the violent subjects, 102 of them whose total weighted score of the MOAS≤0 were the control subjects.

采用《修订版外显攻击行为量表》对符合美国精神障碍诊断与统计手册第4版的精神分裂症患者进行评定，99例MOAS加权总分≥4分者纳入有攻击行为组，102例MOAS加权总分0分者为无攻击行为组。

If control horizon is weighted as usual, it results in constraint control law. Author proposes pseudo weighted control scheme which avoids assumption of inverse stability.

最后，又提出了该模型自适应逆动态组合极点配置控制方案该方案的新颖之处就在于构造非线性增益自适应动态逆，用来补偿非线性增益。

The quasi weighted method of calculating interval weighted effic...

最后，对某型号电动汽车的评价参数进行了分析和计算。

PartⅢDiagnostic strategy of Breast Lesion using combination of dynamic contrast-enhanced and diffusion-weighted imagingPurpose:To evaluate the diagnostic accuracy of a combination of dynamic contrast-enhanced MR imaging and diffusion-weighted MR imaging in characterization of breast lesion and to find the strongest discriminators between malignancy and benignancy.Materials and Methods:223 patients with 236 pathology-confirmed breast lesions were examined using EPI-DWI,FSE-T2WI,SE-T1WI,DCE-MR imaging were performed using VIBRANT sequence.

第三部分磁共振动态增强扫描结合扩散加权成像诊断乳腺癌的策略研究目的：分析乳腺良、恶性病变的形态学表现、血流动力学表现，结合ADC值，采用单变量和多变量分析，挖掘有意义的恶性MR征象，制定乳腺癌的诊断策略，探讨动态增强MR(dynamic contrast-enhanced MR imaging，DCE-MRI)结合DWI对乳腺病变的诊断和鉴别诊断价值。

In chapter two, we first consider the linear system WAWx=b, where A is an m*n rank-deficient matrix. Then we consider the weighted Frobenius norm on data, and get the formula of W-weighted Drazin inverse solution of the linear system.

第二章的前半部分介绍了线性系统 WAWx=b 的加 W 权的 Drazin 逆解在范数带参数的 Frobenius 范数意义下的条件数，这里矩阵 A 为一个 m*n 的秩亏阵。

On the aspect of error compensation, the system using the geometric average sound pressure instead of the arithmetic average sound pressure to get the sound pressure of the measurement point. This method not only reduces the high frequency error in the sound intensity measurement, which compensates the finite difference approximation error, but also greatly reduces the computation of the sound pressure spectrum.

误差补偿方面，课题采用几何平均声压代替通常的算术平均声压来计算双传声器法的声场声压值，这样不仅可以有效的减少声强测量中的高频误差，对有限差分误差起到了补偿作用，而且还大大减小了声压谱计算中的计算量。

In this paper we considered three problems on Asian options pricing: The valuation of geometric average Asian options with stochastic averaging period, the valuation of Asian options with fixed strike price and floating strike price in the case of arithmetic average.

本文考虑了三个关于亚式期权的定价问题：平均周期是随机的几何平均亚式期权的定价；具有固定执行价格的算术平均亚式期权的定价和具有浮动执行价格的算术平均亚式期权的定价。

The main results are as follows:We review the existing Monte Carlo control variates estimators of the price of Asian options and propose a new one. According to pratical needs, we define efficiency as the inverse of the product of the variance of an estimator and its computational time and make it a standard for comparisons to draw the following conclusions: Firstly, the more control variates correlate with arithmetic average Asian options, the larger is the efficiency of an estimator with these control variates, but among which the geometric average option plays the most important role; Secondly, an estimator with more control variates is better than one with less ones only when the time to maturity is long and the volatility is high.

在综合已有研究工作的基础上，本论文的主要创新成果如下：（1）我们回顾了已有的亚洲期权价格的蒙特卡罗控制变量估计，并提出了一个新的控制变量估计，且从客观实际出发，将估计值的方差和计算时间的乘积的倒数定义为效率并以它为标准比较各估计，得到以下结论：与算术平均亚洲期权相关程度越大的控制变量构成的估计的效率越大，而其中起主要作用的控制变量为几何平均亚洲期权的价格；只有在到期时间较长且标的资产的波动率较大时，元素多的多元控制变量估计比元素少的效率大。

Beginning with a general mean function, the model analyzes the distance between the arithmetic average and geometric average by Taylor's expanding.

第二章介绍了亚式期权定价研究中的市场结构、一般原理和若干重要的定价方法：PDE偏微分方程法；埃级沃斯级数展开近似定价；倒数分布近似定价；条件期望近似定价；执行价格调整近似定价，这些方法使亚式期权的定价得到了很大的发展。

I go to school at night.

我是上上学。

Clear Tip Nasal Aspirator: A soft time and gentle suction action makes removing excess mucus easy.

鼻吸明确提示：一个柔软的时间和温柔吸力行动使消除过剩的粘液容易。