查询词典 sample covariance

In order to find the difference of the isotopic composition of different organic compounds before and after complexation, the autogamy standard sample is performed by molecular sieve adsorption to study the variation of the isotope compositions of n-alkanes, isoalkanes and cyclanes.

通过对自配标准样品进行S分子筛吸附试验，测定了用5分子筛吸附法分离前后正构烷烃、异构烷烃和环烷烃碳同位素值，探讨试验前后碳同位素值的变化。

We firstly summarize the NN system modeling methods and the popular optimization algorithms, and point out the deficiencies, the limitation of noise cancellation modeling and the need of human intelligence participation, in our former optimization work after analysis. An abstract problem is extracted. It is to find out control variant that makes system output optimized using the data comprising a sample set with N x samples and their corresponding y, and it does not explore given system and achieves full automatic computation procedure. Next we propose a multi-variant controlled system optimization method utilizing CASSANDRA-I small type neural computer and program its application software. Moreover systematic experiments are made to demonstrate the method's validity, ability of noisy samples disposal and practical application.

我们总结了神经网络系统建模方法以及得到广泛采用的优化算法，并分析指出我们前阶段的优化工作中存在的去噪声建模有局限性和计算过程需人干预的不足，在此基础上把问题抽象为：已从系统获得含N个控制量样本的样本集S以及每个样本对应的系统输出，如何依据这些数据求出一个使系统输出y得到优化的控制量x，而不研究具体系统，实现不需要人智能参与自动完成的计算过程；提出应用人工神经网络硬件系统——CASSANDRA-I小型神经计算机的多变量控制系统优化方法，设计完成了其应用软件；并进行系统的实验工作，验证算法的有效性以及此方法处理带噪声样本和实际应用能力。

The method was without complicated operation to the sample pretreatment, its automaticity was good and sensitivity was higher.

本方法无需用手工进行繁杂的样品前处理，简便易行，灵敏度高，已成功用于火电厂水汽样品中痕量铜的测定。

This paper use five up and out warrants that have been issued in Taiwan, assuming the returns of their underlying assets follow the generalized autoregressive conditional heteroskedastic process. We can estimate their parameters by in-sample data, and simulate the price of underlying assets and also the theoretical price of the up and out warrants.

本文选取在台湾发行之五档上限型的认购权证假设其标的资产报酬率服从GARCH(1，1)模型，利用样本内的资料模拟GARCH(1，1)模型的参数，并利用估计出来的参数模拟标的资产样本外的价格以及上限型认购权证的理论价格。

Great interest in garment design, sample modification, materials, printing and auxiliaries and accessories.

对服装设计，样品改进，服装材料，印版辅料配件等等方面有很大的兴趣。

Then, auxiliary variable selection and sample data processing were presented.

研究了辅助变量的选择和样本数据的处理。

We then calculate the sample average and the standard deviation to construct confidence interval, and the related t statistic.

计算样本均值，标准差和对应的置信区间以及t值。

Results The lot tolerance percent defective, retest possibility, average sample number and disputable zone in ChP, ICH method and the advanced ICH method are 9.4%, 27.4%, 15.5 and 15.0%;5.5%, 69.6%, 23.9 and 11.0%;5.5%, 40.5%, 18.1 and 11.0%, respectively.

结果 《中华人民共和国药典》含量均匀度检查方法、ICH方法及ICH改进方法的批允许废品率、复试率、平均样本容量和争议区分别为9.4%、27.4%、15.5和15.0%；5.5%、69.6%、23.9和11.0%；5.5%、40.5%、18.1和11.0%。

The special features of this method were the simplicity in sample preparation and the avoidance of pollution.

此方法的特点是试样制备较简单，且避免了污染。

A new type of optical storing material, the film sample of azobenzene disperse red polymer is measured by using the single beam Z-scan technique.

采用单光束Z扫描技术对新型光学存储材料偶氮分散红聚合物的薄膜样品进行了测量。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。