结合数据光滑、曲线自动拟合和历史拟合技术,编制了低渗非达西渗流的试井软件。
Combing with the technologies of data softness, automatic and history imitate, the well testing software for Non-Darcy percolation flow in low permeability reservoirs compiled.
提出了“利用反双曲正弦函数变换提高数据列光滑程度”的新结论,获得了递增时间序列改善的自回归预测新方法。
A new conclusion is put forward, in which the smooth degree of the data row can be enhanced by means of the arc-hyperbolic sine function transformation.
灰色预测模型GM(1,1)主要适用于光滑数据序列的预测。
The GM (1, 1) forecast model fits in with mainly the smooth data sequence.
通过实例计算表明,该方法可以高精度地将全区域范围的水泵试验数据拟合成光滑的特性曲线,并能够消除因试验随机误差所引起的曲线扰动。
It is proved in the examples that the new method works well in precisely building the pump test data in wide area into smooth curve without disturbance caused by the random test error.
基于样条最小二乘数据拟合方法建立的数学模型不仅可以提高模型精度和拟合程度,而且模型阶数较低,光滑性好。
The mathematical model built by the data fit method based spline least square has not only higher precision of model and fit coherence, but low degree of model, more smooth also.
上证综合指数是股票市场的一个重要指标,我们采用样条函数,将带光滑参数的最小二乘法应用于拟合该指标的历年数据。
Shanghai Composite Index is an important index for Chinese stock market, and we apply the Least Squares Method with roughness penalty to smooth its historical data, using spline functions.
考虑一个带有松驰机制的双曲型守恒律组,证明了当初始数据适当小时,整体解的存在及光滑性。
A hyperbolic system of conservation laws with relaxation is considered, and the existence and smoothness of the solution is proved.
用提高原始数据列光滑度的方法来提高灰色预测模型(GM模型)的精度。
The accuracy of grey forecasting model (GM) is increased by improving the smooth degree of original data sequence.
证明了利用反双曲正弦函数变换能提高数据列的光滑程度,给出了改善的自回归预测方法,并且举例加以论证。
This paper proves that the smooth degree of a data row can be increased by transforming the counter-hyperbolic sine function.
它的拟合精度与建模数据序列的光滑度有关。
Its fitting precision is related to the smooth degree of modeling data sequence.
经过实测数据仿真试验表明,样条拟合能较好地兼顾最优拟合与曲线光滑度的选择,算法的预测效果良好。
Results of the test using field data show that the spline fitting can make a better compromise of best fitting and smoothness, and the algorithm performs better in short-term traffic flow forecasting.
讨论了噪声对补偿的影响,提出了用回波数据拟合曲线来光滑质心距离轨迹和相位轨迹的方法。
The noise effect on the motion compensation is discussed. To solve the problem, a new method 'which USES echo goodness-of-fit curve to smooth the centroid range trace and phase trace is proposed.
UCI数据集上的实验结果表明,算法能很快收敛,且分类精度优于并行下降算法和光滑支持向量机。
Experimental results on UCI dataset show Powell algorithm converges fast and its accuracy is higher than that of coordinate descent method and smooth SVM.
最后边界点相联,组成光滑的边界曲线,完成对数据点云的划分。
At last, the smooth curves were obtained by linking the edge-points. So the segmentation of data points is...
通过与实验数据比较,该算法模拟的碎片云的形状及特征与实验相吻合,验证了光滑粒子法对冲击动力学问题数值模拟的有效性。
The characteristics of the simulated debris clouds are in agreement with the experimental results, which show that SPH method is effective in modeling the hyperveloci…
通过与实验数据比较,该算法模拟的碎片云的形状及特征与实验相吻合,验证了光滑粒子法对冲击动力学问题数值模拟的有效性。
The characteristics of the simulated debris clouds are in agreement with the experimental results, which show that SPH method is effective in modeling the hyperveloci…
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