查询词典 andre polynomial

In the proposed method,properly spaced background sample pixels are automatically picked up from the image,and then they are used in polynomial fitting for obtaining distribution characteristic of background light.

这种方法假设同类物体具有类似的特征，在灰度图像中是亮度，在彩色图像中则为物体的颜色。

This dissertation studies several kinds of instantaneous frequency estimation methods, pay much attention to the performance of instantaneous frequency estimation algorithm based on the peak of time-frequency distribution. It gives the theory and algorithm of polynomial Wigner-Ville distribution, analyzes its performance to the noise of the moving target in the air.

对常用的几种瞬时频率估计算法进行了研究，重点研究了基于时频分布峰值的瞬时频率估计算法的性能，给出了多项式Wigner-Ville分布的原理与算法，分析了在直升机定位这种特定情况下的有效性。

In order to improve the frequency resolution, realize high precision frequency estimation, this thesis proposes the high resolution polynomial Wigner-Ville distribution using Chirp-Z transform, the validity of this algorithm is verified using synthesized data.

为了提高基于FFT的谱分析算法的分辨率，实现高精度的频率估计，提出了利用Chirp-Z变换的频率高分辨多项式Wigner-ville分布，并用合成的仿真数据，验证了上述算法的有效性和正确性。

We also use linear and polynomial fit to analyze their distribution trends and differences among chromosomes and among different kinds of sequences.

果蝇染色体参数X值是由D1和D2值共同决定的，但果蝇染色体的编码序列参数X分内含子序列相比，分布没有趋同性。

It proposes an approach which is suited to the frequency estimation of the moving target in the air. It is based on the extraction of the peak of polynomial Wigner-Ville distribution, data driven window width adaptive adjustment, can meet the demand of location precision.

提出了适合于空中运动目标的瞬时频率估计的工程实现算法，即利用多项式Wigner-Ville分布的峰值提取瞬时频率，并通过数据驱动的自适应算法调整窗宽，以达到定距精度对频率估计提出的精度要求。

Then, forecasting return is accomplished. Because of being free of probability distribution suppositions for the sale quantity and the return quantity, such as the binomial distribution and the polynomial distribution, the model is more flexible compared to previous forecasting models.

该预测方法的突出特点是，无需像以往预测模型那样假定回收量和前期销售量符合特定的概率分布(例如多项式概率分布或二项式分布)，因此模型具有较强的通用性。

Then it compares these operators' performance through its convergence quality,and it demonstrates that this over-flow dealing method is effective through a group of experiments,the mutation operators used in single-objective optimization have the respectable distribution to polynomial mutation and achieve better convergence quality.

通过一组实验表明这种越界处理方法是非常有效的，单目标优化中的这些变异算子具有与多项式变异算子相当的分布性，同时取得了更好的收敛性能。

It gives performance comparison of instantaneous frequency estimation algorithms based on the peak of Wigner-Ville distribution and fourth-order polynomial Wiger-Ville distribution, analyzes the influence of window width to the estimation performance of instantaneous frequency estimation algorithms based on time-frequency distribution.

在不同飞行状态下，给出了基于Wigner-Ville分布、四阶多项式Wigner-Ville分布峰值的瞬时频率估计算法的性能对比，并分析了窗长对瞬时频率估计性能的影响。

Base on internal energy, the model for average temperature was researched in this article. Through making a proper assumption, the polynomial curve model for temperature distribution and the linear model for specific heat distribution between two nodes were developed.

本文以内能为基础建立平均温度解析模型，通过合理假设建立钢板厚度方向上的多次曲线温度模型和节点间线性比热模型，从而获得任意时刻钢板厚度方向上的平均温度。

Secure multicast ; key distribution ; polynomial expansion ; logical key hierarchy ; PE-RLKH

安全组播；密钥分配；多项式展开；逻辑层次密钥； PE-RLKH

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。