查询词典 variable error

Local discontinuous Galerkin method for convection-dominated diffusion problems with periodic boundary conditions is constructed. To deal with the derivative of second order, an auxiliary variable is introduced. The stability and error estimations are presented simultaneously.

针对具有周期性边界条件对流占优的扩散问题中的二阶导数，引入辅助变量，构造了局部间断Galerkin方法，并给出了方法的稳定性结果和误差估计式。

Based on study of relationship between the average quadric error and the surface curvature, a variable resolution surface reconstruction algorithm was proposed.

在研究平均二次误差与曲面曲率关系的基础上，提出了变分辨率的曲面重建算法。

CVSD (Continuous Variable Slope Delta Modulation) voice coding enables operation at high bit- error rates.

连续可变斜率增量调制的语音编码可以在高误码率的情况下正常工作。

With the help of this variable, a much better model is obtained. Its estimation errors and prediction errors are all very small closing to the measurement error level.

另外，当用一种同系物系列中的化合物构建投影方向时，能得到一个针对同系物的分类，并由此提出了类距离变量，用类距离变量可以建立非常优良的构性关系模型。

to reduce the impact of carrier frequency offset in ofdm system,this thesis designs a new carrier frequency offset estimation scheme for ofdm system.the carrier frequency offset estimation includes acquisition and tracking.we adopt variable step size adaptive algorithm.the acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth.through this method we can not only avoid the feedback by using forward error correction,but also reduce the times of complex multiplication in order to reduce the power consumption of the system.this algorithm not only has low complexity and fast convergence nut also can improve the demodulation performance of ofdm system.computer simulation illustrates the superior performance of the proposed algorithm with regard to estimation accuracy in both awgn channel and multi—path channel.

摘 要：为了减小正交频分复用系统受频率偏差的影响，在ofdm系统中设计了一种新的载波频偏估计算法。频偏估计包括跟踪和捕获两个阶段，文中采用变步长自适应算法来进行跟踪，这个跟踪算法的捕捉范围是整个信号带宽的一半。通过此方法，不但可以利用前向纠错的方式来避免反馈，而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。该方法运算复杂度低，并具有较好的收敛性，能改善odfm的解调性能。从计算机的仿真效果可以看出无论是在awgn信道上还是在多径信道上都表现出了卓越的性能。

The the probabilistic forecasting method of the error between the sample mean and expectation value of the random variable utilizing the central limit theory was researched, then the mathematical formula for the relation between sampling size and variance coefficient of loss of load probability was analyzed. Furthermore, the formulas for the relation between confidence intervals of variance coefficient and sampling size are deduced.

基于中心极限定理深入研究随机变量的样本均值与期望值之间误差的概率预测方法，在此基础上分析失负荷概率(loss of load probability，LOLP)指标的方差系数和样本容量之间的关系表达式，导出方差系数给定时的样本容量置信区间公式及样本容量给定时的方差系数置信区间公式。

As for the characters of the Doppler Radar radial velocity data, the single variable background error covariance is used. And the anisotropic covariance function is adopted in the horizontal plane.

其根据多普勒雷达径向速度资料的特点，水平方向采用非各向同性的单变量背景场误差协方差函数。

The regression process contains the likelihood of the future values of the dependent variable y being in error.

在回归分析程序中，可能使未来的应变量y值产生了误差。

This paper, however, has extended the scope of employment structure studies by introducing exchange rate as a new variable in positivist studies and the methods of co-integration test and error correction model in the comparison of the relationships between real exchange rate and the proportion of tertiary industry production value and between the proportion of employment of China and Japan.

关于就业问题，以往的研究主要从就业总量与就业结构两个角度进行探讨，本文对就业结构的研究进行了拓展，在实证研究中引入汇率，运用协整和误差修正模型对日中两国实际汇率与第三产业产值比重和就业比重之间的关系进行了国别比较。

This paper,however,has extended the scope of employment structure studies by introducing exchange rate as a new variable in positivist studies and the methods of co-integration test and error correction model in the comparison of the relationships between real exchange rate and the proportion of tertiary industry production value and between the proportion of employ...

实证结果表明，从长期看日本第三产业就业比重上升与实际汇率升值正相关，而中国的相应变量间不存在类似长期关系。比较分析得出结论：只有在汇率适度浮动，资源在部门间流动壁垒减少这两个条件满足时，汇率升值才会产生资源配置作用，推动劳动向非贸易部门转移，逐步优化就业结构。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。