查询词典 correlation method

The methods of reliability and validity test of indictors system are Spearman rank correlation test method and Cronbach's alpha coefficient test way.

更多 arman等级相关检验两种方法评价结果的一致性，检验指标体系的效度，利用SPSS的信度检验模块，检验指标体系的信度。

In order to evaluate the core competence of suppliers properly, a new analytic index system is put forward, and a judging method of grey correlation model is given.

提出了供应商竞争力的分析指标体系，构建了一个基于灰色系统理论的灰色关联模型。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

摘 要：传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收，通过多路试探搜索各距离单元的目标，电路复杂。提出的数字化方案，对回波信号直接数字化，利用高速dsp实现数字卷积，可替代多路模拟相关电路。但是直接卷积的运算量过大，dsp无法承受。本文对此进行了研究，分析了包括fft在内的五种快速算法，结合prc-cw雷达的具体情况，确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

The motion dynamics and echo models of the precessing warhead in single frequency are set up. Based on a quantitative analysis on echo spectrum and micro-Doppler modulation of precessing cone, a precession parameter estimation method by echo correlation and spectrum width is proposed. The experiments on data by simulation and darkroom measurement verify the method.

建立了单频信号下雷达观测弹头的进动模型和回波模型，通过对进动弹头回波频谱与微多普勒调制特性的定量分析，提出了利用回波相关方法和频谱展宽估计进动参数的方法，并利用暗室测量数据对该方法的性能进行了实验验证。

The shortcoming of determining failure distribution in intuition is pointed out, and an idea of quantitating similarity between theoretic curve and testing curve to determine the failure distribution of samples is presented, which is based on analyzing the traditional leaf-figure method. Furthermore, the correlation coefficient method is considered to quantitate similarity between two curves.

在分析传统树叶图方法的基础上，指明了直观判断失效分布的弊端，提出了用量化理论曲线和试验曲线间相似度的方法来确定样本失效分布的思想，进而考虑用相关系数方法来量化曲线间的相似度。

Compared with conventional method, the proposed auto-correlation difference algorithm had better robustness and anti-noise ability. It produces a keen-edged peak and reduces the plateau's uncertainty of the traditional method.

文中提出的自相关差分算法产生一个尖锐的最大峰，显著降低了传统算法中由于存在峰值平台带来的不确定性，与传统的算法相比，具有更好的鲁棒性和抗噪声性能。

In this paper,the SMO-type lithium ion sieve was the main research object,the manganates and lithium salts were taken as the main raw materials.Two LISs with high uptake capacity,better selectivity and stable structure were successfully prepared by hydrothermal method and coprecipitation method based on the discussion of correlation between Li+ uptake performance and the preparation conditions of LIS precursors.The effects of preparation conditions on Li+ uptake were also investigated.

本文以SMO型锂离子筛为研究对象，以锰盐和锂盐为主要原料，在采用固相法探讨离子筛前驱体制备条件与离子筛提锂性能关系的基础上，分别采用水热法、共沉淀法为主要合成方法，成功制备了具有高提锂容量、选择性好及结构稳定的两种锂离子筛材料，并研究了合成条件对材料制备及提锂性能的影响。

In order to reveal the nature of reducibility of organic compounds and find theoretical basis for the selection of organic reductants, the electronic structure of studied organic reductants and related organic compounds has been calculated by means of HMO method、CNDO/2 method in quantum chemistry. It was discovered that the energy of the highest occupied molecular orbital of organic compounds has best correlation with their reducibility, and theoretical criterion for reducibility of organic compounds was presented.

为了揭示有机化合物还原性的本质，为有机还原剂的寻找提供理论依据，应用量子化学HMO法、CNDO/2法计算分析了研究的有机还原剂及相关有机化合物的电子结构特性，发现有机化合物的最高占据分子轨道HOMO能量与其还原性之间具有最好的相关性，据此提出了有机化合物还原性的理论判据。

The method of obtaining time delay parameters with the reverse access channel is discussed. The modified algorithms of classic correlation methods of TOA estimation are proposed. Noncoherently combining algorithm and group coherent combining algorithm are given. They decrease the computational complexity and are more suitable for implementations in practical systems. The leading edge detection algorithm is proposed to mitigate the effect of multipath in TOA estimation. Then the secondary search method is proposed, it can solve the matching issue of PN code in CDMA systems. The location algorithms based on LS are discussed; include circular trilateration with LS, hyperbolic trilateration with reference differencing, hyperbolic trilateration with sequential differencing and circular trilateration with TOA differences. The design and implementation of wireless location system based on TOA/TDOA in CDMA2000 systems are given. The location process is discussed, and the hardware and software implementation of TOA estimation are given. Finally, the wireless location system which uses TOA estimation and LS location algorithms above is tested in the real environment.

文中讨论了采用CDMA2000反向链路中的接入信道来获取时延的方法和过程；对TOA估计的传统的相关法进行了改进，提出了非相干合并相关法和分组合并相关法，减少了基于相关的时延估计算法的运算量，提高了算法的实用性，对算法进行了仿真和性能分析；采用边缘检测技术有效减少了TOA参数估计中的多径干扰，提高了时延参数估计的准确度；提出了一种TOA估计的二次搜索法，解决了多个定位测量单元同时进行TOA估计的PN码匹配问题，进一步了提高TOA估计的精度；在采用时延值的定位算法中引入了基于LS的圆周法、基于参考差的双曲线法、基于相邻差的双曲线法和基于TDOA的圆周法，讨论了各算法的应用条件，进行了算法性能的仿真分析；给出了CDMA2000系统中的TOA/TDOA的无线定位的系统方案和实现流程，并对TOA值估计算法进行了软硬件实现，还对采用TOA估计算法、LS定位算法和定位系统设计方案实现的定位系统的进行了现场定位性能测试。

Furthermore, from the experimental result of the solid chiral medium manufactured by sol-gel method, a chiral sol-gel containing the griseofulvin within the PMMA solution produced by the first manufacture method, the concentration of griseofulvin is from 0 to 0.0665g/ml and the increment is 0.0133g/ml, it shows that a correlation coefficient is 0.99969, the standard deviation of measured rotation angle is 0.0007deg, and the average relative error of the measured rotation angle is 3.42%.

然而利用溶胶-凝胶法制备出旋光凝胶固体中，在制程一中含灰黄霉素PMMA凝胶实验结果显示，灰黄霉素浓度从0-0.0665g/ml而增量为0.0133g/ml，相关系数为0.99969，而标准偏差为0.0007度和测量旋光角平均相对误差为3.42％。

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。