针对传统矿浆细度检测的离线筛分法效率低且不能及时反馈至上层磨矿系统的问题,为开发出细度自动检测技术,提出一种曲面拟合算法,即:基于最小二乘法改进的移动最小截平方法(MLTS-LS,Moving Least Trimmed Square-Least Square)对矿浆细...针对传统矿浆细度检测的离线筛分法效率低且不能及时反馈至上层磨矿系统的问题,为开发出细度自动检测技术,提出一种曲面拟合算法,即:基于最小二乘法改进的移动最小截平方法(MLTS-LS,Moving Least Trimmed Square-Least Square)对矿浆细度数据进行曲面拟合,以达到快速检测矿浆细度的目的。首先,通过细度检测试验采集矿浆细度三维离散数据;其次,计算分析“Nearest”、“Linear”、“Cubic”、“V4”和传统的最小二乘法的曲面拟合评价指标,提出一种改进的插值算法;最后,将“MLTS-LS”算法应用于矿浆细度三维离散数据的拟合。结果显示,“MLTS-LS”算法的和方差值与均方差值明显小于其他算法,且其确定系数值与校正决定系数值均接近于1,表明“MLTS-LS”算法对矿浆细度三维离散数据的拟合效果较好。展开更多
This work presents method of the quality analyses of the photorealistic images. Developed method utilizes proposed criteria of image definition quality for fine details. Presented method has the following significant ...This work presents method of the quality analyses of the photorealistic images. Developed method utilizes proposed criteria of image definition quality for fine details. Presented method has the following significant property: the quality estimation is provided without test images or patterns. Algorithm for search and recognition of fine structures in the photorealistic images using the predefined criterion is considered.展开更多
A genetic algorithm of body waveform inversion is presented for better understanding of crustal and upper mantle structures with deep seismic sounding （DSS） waveform data. General reflection and transmission synthet...A genetic algorithm of body waveform inversion is presented for better understanding of crustal and upper mantle structures with deep seismic sounding （DSS） waveform data. General reflection and transmission synthetic seismogram algorithm, which is capable of calculating the response of thin alternating high and low velocity layers, is applied as a solution for forward modeling, and the genetic algorithm is used to find the optimal solution of the inverse problem. Numerical tests suggest that the method has the capability of resolving low-velocity layers, thin alternating high and low velocity layers, and noise suppression. Waveform inversion using P-wave records from Zeku, Xiahe and Lintao shots in the seismic wide-angle reflection/refraction survey along northeastern Qinghai-Xizang （Tibeteau） Plateau has revealed fine structures of the bottom of the upper crust and alternating layers in the middle/lower crust and topmost upper mantle.展开更多
文摘针对传统矿浆细度检测的离线筛分法效率低且不能及时反馈至上层磨矿系统的问题,为开发出细度自动检测技术,提出一种曲面拟合算法,即:基于最小二乘法改进的移动最小截平方法(MLTS-LS,Moving Least Trimmed Square-Least Square)对矿浆细度数据进行曲面拟合,以达到快速检测矿浆细度的目的。首先,通过细度检测试验采集矿浆细度三维离散数据;其次,计算分析“Nearest”、“Linear”、“Cubic”、“V4”和传统的最小二乘法的曲面拟合评价指标,提出一种改进的插值算法;最后,将“MLTS-LS”算法应用于矿浆细度三维离散数据的拟合。结果显示,“MLTS-LS”算法的和方差值与均方差值明显小于其他算法,且其确定系数值与校正决定系数值均接近于1,表明“MLTS-LS”算法对矿浆细度三维离散数据的拟合效果较好。
文摘This work presents method of the quality analyses of the photorealistic images. Developed method utilizes proposed criteria of image definition quality for fine details. Presented method has the following significant property: the quality estimation is provided without test images or patterns. Algorithm for search and recognition of fine structures in the photorealistic images using the predefined criterion is considered.
基金National Nature Science Foundation of China (40334040) & Joint Seismological foundation of CEA (101026)
文摘A genetic algorithm of body waveform inversion is presented for better understanding of crustal and upper mantle structures with deep seismic sounding （DSS） waveform data. General reflection and transmission synthetic seismogram algorithm, which is capable of calculating the response of thin alternating high and low velocity layers, is applied as a solution for forward modeling, and the genetic algorithm is used to find the optimal solution of the inverse problem. Numerical tests suggest that the method has the capability of resolving low-velocity layers, thin alternating high and low velocity layers, and noise suppression. Waveform inversion using P-wave records from Zeku, Xiahe and Lintao shots in the seismic wide-angle reflection/refraction survey along northeastern Qinghai-Xizang （Tibeteau） Plateau has revealed fine structures of the bottom of the upper crust and alternating layers in the middle/lower crust and topmost upper mantle.
