查询词典 correlation method

Methods:a solid-phase extraction and gas chromatography-mass spectrometry procedure for the simultaneous detection of tramadol and its main metabolite in urine has been developed.results:the linearity of the tramadol solution from 0.1 g/ml to 100 μg/ml is fine ,and correlation coefficient is 0.9957.the average recovery was 99.21%,and the relative sandard deviation was 2.83%.conclusion:it is a rapid,simple,accurate and sensitive method.it is also an effective method for rapid detection whether there is tramadol in urine of druggy.

采用c18固相萃取法对尿中曲马多原体及其主要代谢物进行提取，利用gc-ms对其进行检测。结果：线性范围为0.1~100μg/ml（r=0.9957，n=6），平均回收率为99.21%，相对标准偏差为2.83%，最低测量限为 0.1 g/ml 。结论：本实验研究建立了尿中曲马多及其代谢物的快速、简便、准确、灵敏的检测方法，可作为快速检测吸毒人员尿中是否含有曲马多的一种有效的方法。

It researches the regularity of A (geometrical cross section area of valve), Sc (obtained by the definition of effective cross section area of valve), Sa and Sv (obtained by sonic velocity air exhaust method) to the change of the opening of valve, x. By contrastive method this thesis discusses the reliability and correlation of all methods above for solving effective cross section area of valve.

研究了 A， Sc （根据试验由有效截面积 S 的定义算出）， Sa及 Sv随阀开度 x 变化而变的规律，通过对比探讨了求解以上各种有效截面积方法的可靠性及相互关系等。

This article introduced Newton iteration method's related concept, Newton iteration method's correlation theorem, as well as when solves the misalignment equation root the theory basis, the astringent analysis, the starting value selection rule and so on.

本文介绍了牛顿迭代法的相关概念，牛顿迭代法的相关定理，以及在求解非线性方程根时的理论依据，收敛性分析，初始值的选取规则等。

The correlation coefficient is 0.9991. The method has been applied to the determination of trace cadmium in galvanization waste water with the relative standard deviation of 2.5%-3.2% and the recovery of 98.0%-102.0%. The results of this method are in good agreement with those of AAS.

方法用于电镀废水中微量锡的测定，相对标准偏差为2.5%~3.2%，加标回收率为98.0%-102.0%，测定结果同原子吸收光谱法的测定结果相吻合。

Experiments under real environments were conducted to compare the proposed TDE method with the existing higher-order spectra, least mean square and generalized cross-correlation. The result shows that the propose m d TDE method is of higher robustness and precision.

野外坦克声数据实测表明，在无干扰环境下，算法性能与高阶统计量法、广义互相关法相当，但在武器噪声干扰下表现了更强的鲁棒性和估计精度；在各种条件下，文中算法都比最小均方自适应法表现出更好的性能。

The method transfers the observed data from space domain to 2-D space-time domain by exploiting the cross-correlation of the array outputs,and a large amount of virtual elements are generated through space-time processing.Therefore the constraint over the array configuration and the element identity can be significantly weakened,which means the matching subarray is no longer needed and the advantage of the traditional DOA matrix method,such as automatical parameter alignment and no need of 2-D search,is still available.

该方法在保持原DOA矩阵方法无需二维谱峰搜索和参数配对等优点的基础上，利用阵元输出之间的互相关关系将空域的阵列观测数据变换到时空域，通过空时二维处理在时空域中衍生出大量虚拟阵元，从而大大减弱了传统方法中对阵列结构、排布方式和阵元一致性的约束，不需要匹配子阵，无冗余阵元与孔径损失，并适用于阵元排列不规则的阵列。

When the signal sources have different cycle frequencies, a method to estimate the optimal time lag is presented. It solves the severe problem that the conventional Cyclic MUSIC requires knowing the optimal time lag in computing the cyclic correlation matrix. A method of two-step search for DOA estimation by employing an interleaving technique and a Joint Estimation Strategy is developed to overcome the inadequency of signal sources with the same cycle frequency having no optimal time lag.

当信源的循环频率各不相同时，提出了一种估计最佳延时的方法，解决了传统Cyclic MUSIC算法计算循环相关矩阵需要已知最佳延时的问题；为克服多个具有相同循环频率信源不存在最佳延时的不足，利用交错技术和联合估计策略，提出了两步搜索估计DOA的方法。

Chapter three (the methods of generating chaotic signal and its applications): In this chapter firstly the mechanism that a simple kinetic system, subsection linear map system, can generate chaotic phenomena is affirmed, the characteristics of correlation function of the chaotic signal generated by this system are simulated, on this basis a simple applicable method for generating chaotic signal is given; secondly some typical circuits generating chaotic signal are designed, also use operational amplifier to design a third -order autonomous circuit with chaotic dynamics. The basic mechanism and typical structures of chaos in the application of communication are introduced systematically and a simple method is provided for generating pseudo random code signal; At last Chaotic signal is applied into the analysis of system characteristic.

第三章(混沌信号产生方法及其应用)首先针对一类简单动力学系统——分段线性映射系统能够产生混沌现象的机理及由该系统所产生的混沌信号的自协方差函数特点进行了证明和计算机仿真，提出了软件产生混沌信号的一种实用方法；其次分析讨论了几种能够产生混沌信号的典型混沌电路，提出了用运算放大器与阻容元件实现三阶自治混沌电路的基本原理；概述了混沌在通信领域中应用的基本原理和典型结构，提出了产生伪随机码信号的一种简单方法；最后将混沌信号用于系统的特性分析中。

Correlation matrix and calculation method of joint parameter of network for low osmose oil field are established, which offer a favorable method for solving network problem with computer.

：建立了油田地面网络的相关矩阵及节点的参数计算通式，为计算机处理油田地面网络问题提供了有利手段。

Abstracts: Correlation matrix and calculation method of joint parameter of network for low osmose oil field are established, which offer a favorable method for solving network problem with computer.

摘 要：建立了油田地面网络的相关矩阵及节点的参数计算通式，为计算机处理油田地面网络问题提供了有利手段。

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。