查询词典 asymptotic efficiency

This paper analyzes the application of MC-CDMA in a multiple antennas environment and derives an equation for the closed-form asymptotic spectral efficiency of the system with matched filter and linear minimum mean square error front-ends.

该文从信息论的角度分析了MC-CDMA在多天线通信系统中的应用，得到了当采用匹配滤波器检测子和线性最小均方误差检测子的渐进频谱效率的闭式表达，研究了可用于指导系统设计的频谱效率与发送天线数和接收天线数的关系。

For example: locally most powerful rank tests; regression and the analysis of variance using ranks; asymptotic power and efficiency; goodness of fit tests; permutation tests and randomization as a basis for inference.

局部最大功效秩检验（；利用秩进行回归和方差分析；渐进功效和效率，拟合优度检验，排列检验和作为推断基础的随机化。

Performance analysis and plenty of numerical simulation shows that the robust multiuser detector and its adaptive version have excellent performance of output signal-to-interference-plus-noise ratio, bit error rate, asymptotic multiuser efficiency and robustness even existing stronger MAI.

理论分析和仿真实验表明，即使在较强的多址干扰条件下，稳健的盲线性多用户检测及其自适应实现展示了优异的误码率、信干噪比以及渐进多用户有效性性能，对特征波形失配具有较强的稳健性，且自适应算法能快速收敛至稳态解。

AME (Asymptotic Multiuser Efficiency) is an important factor to evaluate multiuser detector. From this point of view, performance comparison among multistage multiuser detector, decision feedback multiuser detector and linear decorrelating multiuser detector is done here.

评价多用户检测器性能的一个重要的指标就是渐近多用户效率，本文第一次从渐近多用户效率的角度分析对比了多级多用户检测器、判决反馈多用户检测器和线性解相关检测器的渐近多用户效率。

Describes general methods of point and interval parameter estimation and the small and large sample properties of estimators: method of moments, maximum likelihood, unbiased estimation, Rao-Blackwell and Lehmann-Scheffe theorems, information inequality, asymptotic relative efficiency of estimators.

点估计和区间估计的一般方法，估计量的小样本和大样本性质：矩法，极大似然估计，无偏估计，Rao-Blackwell 和 Lehmann-Scheffe 理论，信息不等式，渐进相对有效估计量。

Maximum likelihood, unbiased estimation, Rao-Blackwell and Lehmann-Scheffe theorems, information inequality, asymptotic relative efficiency of estimators.

点估计和区间估计的一般方法，估计量的小样本和大样本性质：矩法，极大似然估计，无偏估计，Rao-Blackwell 和Lehmann-Scheffe 理论，信息不等式，渐进相对有效估计量。

Describes general methods of hypothesis testing and optimality properties of tests: Neyman-Pearson theory, likelihood ratio tests, score and Wald tests, uniformly and locally most powerful tests, asymptotic relative efficiency of tests.

假设检验和经验的最有性质： Neyman-Pearson 理论，似然比率估计，score 和 Wald 经验，一致最大功效检验，局部最大功效检验，检验的渐进相对有效性。

The performance of bit error rate, asymptotic multiuser efficiency, near-far resistance, local near-far resistance, complexity, and processing delay of decorrelating multiuser detector alleviating edge effect is quantitatively analyzed.

多用户检测与空时处理技术是第三代移动通信系统以及未来第四代移动通信系统中的两项关键技术，在性能上表现出的潜力对未来的无线高速Internet以及多媒体业务具有极大的诱惑力。

The error analysis of asymptotic approximation of finite series expansion is also given. Our method avoids choosing the integral length of the reentrant comer, and can be used to calculate the charge on the conductor conveniently and efficiently. Numerical examples are presented to demonstrate the efficiency of the method.

本文算法克服了邓肯矫正需要选择角点积分区域的不足，有效地校正了导体角点奇异性引起的电容参数提取的计算误差，最后给出了算法的数值实验与分析结果。

A convergence acceleration technique based on functional asymptotic expansion and Poisson's summation formula is developed to raise the calculation efficiency of waveguide dyadic Green's functions which are expanded in infinite series.

为此，作者提出"谱展开边界元法"，以求解波导外空间的并矢Green函数；引入边界元法以求解波导壁内折曲缝隙腔的并矢Green函数；并研究了无穷级数的逐级加速收敛变换，以解决波导中Green函数的计算问题。

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。