查询词典 parameter estimation

According to their shape characteristics, the parameter estimation algorithms of circles and ellipses are proposed based on the corresponding constraint condition.

根据圆和椭圆的形状特性，提出了相应的约束条件及圆和椭圆参数求解算法。

The parameter estimation problem to the invertible vector moving average model essentially is a matrix spectral factorization problem.

中文摘要：可逆的向量滑动平均模型参数估计问题本质上是一个矩阵谱分解问题。

The adaptive compensation term of the optimal approximation error and a new robust term are adopted to minify the influence of modeling error and parameter estimation error.

该方案通过引入最优逼近误差的自适应补偿项和新的鲁棒项，削减建模误差和参数估计误差的影响，从而在稳定性分析中取消了要求逼近误差平方可积或逼近误差的上确界已知的条件。

In this method a windowing parameter estimation algorithm is applied to obtain the initiative value of iteration for the nonuniformly sampled record.

对周期信号采样序列重建问题，提出了一种基于采用时域布莱克曼窗减少频谱泄漏的自适应迭代重建算法，该算法利用对采样序列加窗的方法，有效地降低采样长度为非整数倍信号周期所产生的频谱泄漏。

A frame image of a video frequency sequence is read into a postpositional memory zone, and staring position and size information of a tracked object is obtained in the frame, then distribution statistical information of a target signature is extracted to build a gauss mixed model as an object template, a mean vector and a covariance matrix in gauss mixed distribution are used to describe the position and the size of the object, then the next frame image of the video frequency sequence is read into the postpositional memory zone. In a new frame video frequency image, a parameter estimation method is used to obtain object gauss mized model parameters in the current frame in iterative computation and find candidate template similar to the object template, and the final model parameters obtained in iteration are used to update the tracking window for realizing self-adaption of the tracked window.

将视频序列的一帧图像读入缓存区，获得该帧中被跟踪目标的初始位置和尺寸信息，然后提取目标特征的分布统计信息建立高斯混合模型作为目标模板，用高斯混合分布的均值向量和协方差矩阵描述目标的位置和尺寸，再将视频序列下一帧图像读入缓存区，在新一帧视频图像中利用参数估计方法迭代计算当前帧中目标高斯混合模型参数找到与目标模板最相似的候选模板，利用迭代得到的最终模型参数更新跟踪窗口实现跟踪窗宽的自适应。

A reformative multiple model approach is presented to improve the accuracy of parameter estimation when the model set is too large, and it is used to identify system noise.

针对模型集过大导致的参数估计精度下降的现象，提出了一种改进的多模型算法，并将该算法应用于系统噪声辨识。

In consideration of the in-pulse phase modulation and Doppler frequency rate-of-change's subtleness, a fast and accurate algorithm is proposed. The influence to parameter estimation with phase modulation is dismissed by time domain correlation between neighboring pulses. Signal noise ratio is increased by frequency domain accumulation.

该文针对信号脉内相位调制和多普勒频率变化率信息非常微弱的特点，提出了一种快速高精度估计算法，通过相邻脉冲间的时域相关消除了相位调制对参数估计的影响，频域积累增强了信噪比，利用脉冲间的相参特性进行频谱相关消除了相位模糊，并放大了多普勒频率变化率信息。

Parameter estimation method is adopted to get the effective diffusion coefficient from experimetal data,thus the tortuosity factor can be obtained.

在单颗粒串联的色谱柱中，采用示踪气体脉冲讯号输入一响应的动态法，由计算机自动采样分析应答曲线，通过参数估值得到气体在 ZA- 5氨合成催化剂中的有效扩散系数，进而得到曲折因子。

It is secure since it has the capacity to resist chaotic unmasking , noise filter , and synchronization-based parameter estimation .

安全性分析说明，方案能有效抵御基于相空间重构，噪声削减和基于混沌同步的参数估计的攻击，安全性好。

The new method is ap plied to parameter estimation of nonlinear regressive p...

并将其应用于求解非线性回归模型参数估计问题。

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。