查询词典 multivariate

Multivariate time series method is used to analyze the performance of oil production and injection wells.

采用多元时间序列分析的方法，对油水井动态特性进行了分析，建立了油井含水率的多因素预测模型。

The titrant is a mixture of EDTA and sodium fluoride, both mercury film electrode and fluorinion selective electrode are inserted in the titration solution. In a process of titration, both the added volume of titrant and the concentration of mercury ion at each titration point can be obtained simultaneously from the potentials of two electrodes, and then the concentration of each component in the alloy can be obtained from the titration curves by multivariate calibration.

用ED-TA与氟化钠的混合溶液作为滴定剂，被滴定液中同时插入了汞膜电极和氟离子选择电极，在滴定过程中的任一滴定点，溶液中汞离子的浓度和滴定剂的加入体积可由两个电极的电位测定值同时获得，从而可应用多元校正法由相应的滴定曲线求得混合金属中每一种组分的含量。

Throughout comparing the above estimating methods, we have the following results: the estimators of the moments of the errors does not depend on the random effects, and that of the random effects does not depend on the errors, and then the corresponding asymptotic variances are very simple and optimal; when the random effects are multivariate, we can not construct different estimating equations for the random effects and errors respectively, which results that the asymptotic covariances of estimation are very complex and then the estimating efficiency is bad.

比较上述两种估计法，我们发现：当随机效应是一维的时侯，误差的各阶矩的估计不依赖不可观测的随机效应，随机效应的估计也不依赖误差，因此，估计的渐近方差结构特别简单也是最优的；而当随机效应是多维的，因为随机效应的协变量的影响，我们没有办法针对随机效应和误差的各阶矩分别建立估计方程，这导致所得的估计的渐近方差或者协方差矩阵特别复杂，从而估计的效果不是很好。

MR images was analyzed include tumor shape,margin, internal enhancement characteristics,distribution,and time-signal intensity curves,maximam enhancement ratio,early enhancement ratio and so on.The ADCs of lesions were calculated on ADC maps.Univariate and multivariate analysis of MR imaging data were performed to find the strongest discriminators and the Logestic regression model was established to predict the probabilities for malignancy.

由放射科医生采用双盲法阅片，根据乳腺MR影像报告及数据系统(BI-RADS MRI)，将病变按照不同形态学表现分为肿块和非肿块性病变两组，分析形态学表现(形状、边缘、分布特征、内部增强特征)、血流动力学表现(时间-信号强度曲线类型、最大增强率、达峰时间、早期增强率)，并结合ADC值，应用SPSS15.0软件进行单变量及多变量分析，挖掘有意义恶性征象，建立回归模型，计算其敏感性、特异性、准确性、阳性预测值和阴性预测值。

Learning disorders ; Psychosomatic medicine ; Health education ; Multivariate analysis ; Student

学习障碍；心身医学；多元分析；卫生教育；学生

Keywords Learning disorders;Psychosomatic medicine;Health education;Multivariate analysis;Student

学习障碍；心身医学；多元分析；卫生教育；学生

It proves to be able to approximate any multivariate function in a more stable and efficient way, and it is optimal in approximating functions with spatial inhomogeneities.

由于脊波的方向多分辨特性，此网络能精确描述方向性的结构信息，为高维数据提供了一种更稳定的方式，对于某些具有空间奇异性的数据具有最佳表示。

However, in the present times of respecting for the multivariate cultures, the position of these elements of the subcultures in communication is gradually elevated day by day.

然而，在尊重多元文化的当今时代，这些亚文化因素在交际中的地位日益提升。

The invention simultaneously discloses a multivariate compound salt/ammonia solution absorption refrigerating system and a refrigerating technique of the system.

本发明还同时公开了这种多元复合盐/氨溶液吸收制冷系统，以及应用该系统的制冷工艺。

The basic idea of DR is to apply the extended Dixon resultants method to the system of multivariate polynomial equations, by taking x1,x2,…,xn-1 as variables and xn as parameter.

基本思想为对于MQ问题，把x1，x2，…，xn-1当作变元，而把xn当作参数，然后利用和改进扩展Dixon结式方法求解该类系统。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。