估计理论

The relationship between the estimated random sampling variance and the number of samples taken was studied.

本文对随机取样方差估计值的精度与样本数目之间的关系进行了研究，提出了相应的理论公式。

Based on the theorem of random vector and matrix, the statistics of maximum likelihood and MMSE MIMO channel estimations are analyzed under correlated MIMO channels.

基于随机矢量和矩阵理论，分析了相关MIMO信道下的最大似然和MMSE MIMO信道估计的统计特性。

The test points of it are dispersed on the surfaces of two spheres with same centre and different radius,so it solves the problem of rank decreasing of information matrix. It also has such advantages as fewe...

该计划在两个不同半径的同心球面上布测试点，解决了信息矩阵的降秩问题，具有试验点数少、实现方便和模型估计精度高的优点，在理论上和实际应用中均具有一定价值。

Analytical variance of the estimation declines linearly by increasing the bit signal-to-noise ratio for the proposed channel estimator.

理论分析结果表明，该算法的对数估计方差随比特信噪比的增加而线性减小。

By inducting the theory of Quantum Mechanics,this paper studied on the uncertainty of individual value of human capital between dominance and recessiveness.

引入了量子力学理论，考察了个体人力资本显性和隐性价值的测不准性，在人力资本隐性价值区间估计的基础上，构建了考虑显性和隐性人力资本价值转换的人力资本个体价值计量模型。

The support vector machine is one new general learning method,which proposed in the statistical Learning Theory,mainly applied in the data classification and regression estimate,meanwhile the main basis in plant classification is plant's outward characteristic.

支持向量机是在统计学习理论基础上提出的一种新型的通用学习方法，主要应用于数据的分类和回归估计，而植物分类的主要依据是植物的外观特征。

SVM is a newly developed method based on statistical learning theory, and is widely used in non-linear function regression.

支持向量机是近年发展起来的一种基于统计学习理论的学习机器，在非线性函数回归估计方面有很多的应用。

SVM is a new machine-learning method which is developed based on statistical theory and has many applications in pattern recognition,regression analysis,function evaluation,etc.

支持向量机是在统计学习理论基础上发展起来的一种新的机器学习方法，在模式识别、回归分析、函数估计等领域有着广泛的应用。

The main contents is: analyzing some detection method to moving target nowadays; particular studying the principle of detection moving target in SAR; analyzing SAR imaging theory and the echo model of moving target; discussing conventional SAR imaging , the movements of target cause the changes of doppler mass center and regulable frequency, and the changes cause effect the imaging result; introducing the estimation method of doppler parameter; analyzing theory of DPCA, derivating the formula needed, and validating it's validity and practicability through simulation; advancing the improved DPCA algorithm that combine the advantage of DPCA and ATI, and validating it through computer simulation; using the revision algorithm to range ambulate based on keystone transformation, and validating it through computer simulation; discussing the compensation art of SAR imaging.

主要内容有：分析了现有的一些动目标的检测方法；详细研究了SAR动目标检测的原理；分析了SAR成像理论和运动目标的回波模型；探讨常规SAR成像时，目标运动引起的多普勒质心和调频率变化，以及这些变化对成像结果的影响；介绍了多普勒参数的估计方法；分析了DPCA原理，推导所需要的基本公式，并仿真验证其有效性和实用性；提出了结合DPCA和ATI优点的改进DPCA算法，并仿真验证；探讨了SAR成像中的运动补偿技术。通过对仿真结果的分析，本文提出的方法具有一定的指导意义和参考价值。

Roger Penrose, who helped to develop black-hole theories, estimated as one in one hundred billion to the 123rd power the odds of a Big Bang producing by accident an orderly universe as opposed to chaos.

黑洞理论提出者之一的罗杰。彭罗斯估计，大爆炸偶然生成有序宇宙与生成混乱世界的可能性比是1比1000亿的123次方（1／101353）。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。