查询词典 least squares

Based on moving least squares surface, the differential properties of each sample point on PSO are first evaluated. In terms of covariance analysis, the elliptical splat of sample point is then determined on its tangent plane. Finally, the splats are rendered from far to near by using elliptical weighted average filtering. According to the differential properties, moreover, the suggestive contours of PSG are attained so that non-photorealistic rendering of PSG is realized.

首先根据构造的移动最小二乘曲面计算采样点的表面几何属性，然后根据协方差分析确定点元在其切平面上的椭圆表示，最后采用椭圆加权平均滤波从远到近单遍绘制各点元，此外，根据表面几何属性确定点模型的轮廓线，实现了点模型的非真实感绘制。

Twelve microsatellite markers selected from the GENE-BANK were analyzed for polymorphism in silkies. Allele frequencies were estimated based on band presence or absence. Average heterozygosity and polymorphism information content were calculated by allele frequencies, and then, linkage analysis between character and markers by least squares means and the correlation among the 6 characters of egg traits in silkies were studied.

本试验选用12对微卫星引物，通过对丝羽乌骨鸡多态性扩增，计算出这些微卫星标记座位的等位基因频率、多态信息含量、群体杂合度；通过标记多态性与产蛋性状的最小二乘分析和多重比较，进行了分子标记与产蛋性状的相关分析，同时计算了产蛋性状间的表型相关。

With respect to multiple dominant scatterers in one range bin, a nonlinear least squares autofocusing algorithm is proposed.

第五章在建立机动目标成像的信号模型基础上，对机动目标ISAR成像的自聚焦问题进行了讨论。

Further, based on the method of pre-elimination of parameters, the formulae of the partly-weigthed least squares estimation with constraints on parts of the parameters are derived to include a prior information.

在顾及电离层加权模型的情况下，利用参数消去法，推导了加权最小二乘法估计模糊度实数解的公式。

The main idea of the q-stack is to stack data along parabolas which are the least-squares approximation to normal moveout so that the computing time can be reduced.

它的基本思想是采用双曲时距曲线的最小平方逼近抛物线来提高速度迭加的计算效率。

Lsqcurvefit-Torque, least squares curve fitting, mainly for the engine work load curve fitting.

详细说明： Lsqcurvefit-Torque，最小二乘法曲线拟合，主要用于发动机负荷曲线的拟合工作。

In this paper, the image intensity surface for the neighborhood of every pixel is well-fitted by the Least Squares Support Vector Machine, and the gradient and the zero-crossing operators are deduced from the LSSVM with the Radial Basis Function kernel function, as an example.

摘要该文利用最小二乘向量机对原始图像每一像素的邻域作灰度曲面的最佳拟合，并以径向基核函数为例导出了图像的梯度算子和零交叉算子。

The three-sided measurement method and the least squares estimation method based on the three-sided method are improved for a specific set of assumptions.

在一定先验假设情况下，对三边测量法以及由其衍生出最小二乘估计进行改进，并将抗差最小二乘估计方法引入到节点定位计算之中。

Based on the Least Squares Support Vector Machines method, Incremental LS-SVM and Online LS-SVM method is proposed for identification of structural systems in this paper. It efficiently updates a trained LS-SVM by means of incremental and decremental pruning algorithms whenever a sample is added to, or removed from, the training set. The method overcomes the drawback of sparsenesslost within the standard LS-SVM and makes online training for the LS-SVM possible.

本文在最小二乘支持向量机方法的基础上提出了用于识别结构系统的增量最小二乘支持向量机和序贯最小二乘支持向量机方法，当新样本加入进来或老的样本被修剪下去的时候可以有效地更新，这种方法克服了标准最小二乘支持向量机方法的稀疏性缺失，使得结构参数的在线识别成为可能。

The viscosity and surface tension of lubricant have been qualitatively analyzed and predicted by means of partial least squares method and quantitatively calculated using artificial neural network with structural parameters as features. The structural parameters involved distribution coefficient, molecular volume. The qualitatively or quantitatively calculated results are in agreement with experimental results.

用分子碎片法计算表示润滑剂分子结构的体积参数、电负性参数、亲水－疏水性等参数，结合偏最小二乘法和人工神经网络方法对分子结构与表面张力和粘度之间的定量关系进行了计算及预报，结果与实验值符合较好。

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。