Objective Propose a method that combines the propensity score approach and non-parametric survival analysis for hazard ratio estimation in non-randomized medical researches.
目的提出一种适用于非随机化医学研究的，结合倾向指数与非参数生存分析估计风险比的方法。
Implementation of the scheme has resolved the problems on difficult hydrogen nitrogen ratio estimation and difficult control, it has apparent economic and social benefit and worth extend.
该方案实施后，解决了操作人员在实际操作过程中对氢氮比判断难、控制难的问题，具有明显的经济、社会效益及推广价值。
Most resent approaches to the problem employ noise estimate or Signal-Noise Ratio (SNR) estimate, and hence their performances depend on the estimation of noise.
目前的处理方法普遍需要估计噪声或者信噪比，从而其性能依赖于噪声估计的好坏。
In this paper, empirical Euclidean likelihood ratio statistics are constructed for parametric in a nonlinear model. And prove strong consistency and asymptotic normality of the estimation.
本文构造了非线性模型中参数的经验欧氏似然比统计量，并证明了该似然估计的强相合性和渐近正态性。
The authors present a new algorithm for block-matching motion estimation based on wavelet transform. The simulation shows that this algorithm has better PSNR and performance-to-complexity ratio.
提出了一种基于小波变换域的块匹配运动估计搜索的新算法，模拟实验表明，利用此算法可获得比一般运动块匹配方法更大的峰值信噪比，具有更好的性能复杂度比。
The initial estimation method of PU injecting dosage and application of different ratio of insufficient injection dosage in household refrigerator was introduced.
介绍了家用电冰箱注料量的初始估算方法和不同比例注料技术在家用电冰箱发泡上的应用。
In this paper, a transformer tap position tracing estimation algorithm based on turn ratio changing detection is proposed.
本文提出一种基于变比变化检测的变压器抽头位置跟踪估计算法。
The experimental results demonstrate that the method can give a better estimation of poles of damped exponential signals even in a lower signal-to-noise ratio (SNR) situation.
通过实验表明，该方法较其它方法简单有效，即使在较低信噪比的情况下，也能对极点作出较好的估计。
The estimation method of compression ratio is given also.
并给出了压缩比的估算方法。
Therefore, the robust least square method with some additional conditions at the breakdown ratio being 20% was employed for optimal estimation of Muskingum parameters.
为此，采用崩溃率为20%、附有条件的抗差最小二乘法估计马斯京根汇流参数最优值。
For MPSK signals, the signal-to-noise ratio (SNR) estimation can be directly transformed into the signal module estimation.
对于MPSK信号而言，信噪比的估计可以直接转化成对信号模的估计问题。
The effective signal-to-noise ratio (SNR) and the accuracy of autocorrelation estimation are significantly improved through use of this method.
此法大大地提高了有效的信噪比(SNR)和自相关矩阵的估计精度。
This letter mainly deals with the base of adaptive modulating technique: Channel estimation technology and the signal to noise ratio vs. error bit rate performance of MQAM.
本文主要研究自适应调制技术的基础：信道估计技术、MQAM信噪比误比特率性能。
By using subspace disturbing analysis to investigate the statistical performance of the CSS, the relationship between the DOA estimation error and the signal to noise ratio (SNR) was presented.
应用子空间扰动分析研究了宽带CSS法的统计性能，得出了宽带CSS法方位估计误差随信噪比变化的关系。
In this paper, by the analyses about the strategy of the combination hedge in futures markets and its risk, we get least squares estimation of the hedge ratio and its risk.
对期货市场组合套期保值策略和保值风险进行了分析，给出组合套期保值率的最小二乘估计和保值风险的估计。
The bit error probability is estimated by the minimum average Euclidean distance. Through simulation, it is shown that the estimation is usually very accurate at high signal-to-noise ratio.
采用平均最小自由欧氏距离估计误比特率，得到误比特率的封闭式表示，通过计算机模拟，在高信噪比情况下，这种估计方法与实际情况非常接近。
This paper compares the expanded to the unexpanded in the performance of direction of arrival estimation at first, and then analyses the beam of different thinned ratio.
比较了该阵列扩展前和扩展后的测向性能，分析了阵列在不同稀疏比下的测向性能以及波束图，可以看出稀疏阵列的波束图的旁瓣明显降低了。
The estimation of straw yield from the yield of grain and the ratio of G_s is satisfactory for a large area, but for some small plots, the estimations may cause significant errors.
由粮食产量推算秸秆量，对于大面积的估算有较满意的结果，而对于个别地块，其误差可能较大。
FATAFE realizes unbiased estimation and its estimated variance approaches to theoretical lower bound if only signal-to-noise ratio is not very low.
只要信噪比不甚低，频点自跟踪频率估计是无偏的且估计方差接近理论下限。
Correct noise power spectrum estimation and apriori signal-to-noise ratio (SNR) estimation are all essential to good quality of the enhanced speech.
噪声功率谱估计和先验信噪比估计的准确性有助于提高增强后的语音质量。
The high-quality image is also its advantage the same with its high compression ratio, however, it also brings a high level of computation complexity, especially in motion estimation module.
在具有高压缩比的同时，还拥有高质量流畅的图像，然而，也带来了高度的计算复杂度，尤其是运动估计模块中。
This paper will describe and compare three static rollover threshold estimation metrics:Static Stability Factor (SSF), Side Pull Ratio (SPR), and Tilt Table Ratio (TTR).
本文将阐述和比较三种静态侧翻限值的评估度量参数和测试方法：静态稳定系数（SSF）、侧拉比例系数（SPR）和侧倾试验台比例系数（TTR）。
Computer simulations show that, even under low input signal-to-noise-ratio, the accurate estimation of DOA could be given when the virtual array method is applied to the planar array.
仿真结果显示：虚拟阵元法应用于面阵，在输入信噪比较低的情况下仍可以准确判断来波方向。
The correlation is optionally corrected according to the mean channel estimation signal-to-noise ratio.
根据平均信道估计信噪比可选地校正相关性。
The ratio of resistance change is tested using Four Probes Method. The average change reaches 103, and is near to 104 of the theory estimation.
四探针法测量了薄膜电性能，薄膜电阻率平均变化达到103，比理论上只相差一个数量级；
The ratio of resistance change is tested using Four Probes Method. The average change reaches 103, and is near to 104 of the theory estimation.
四探针法测量了薄膜电性能，薄膜电阻率平均变化达到103，比理论上只相差一个数量级；
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