为实现整串红提的紧实度无损检测和分级,提出基于机器视觉检测的分级方法,通过工业摄像头采集新鲜红提串的彩色(red green and blue,RGB)和近红外图像,对整串红提RGB图像的三通道进行提取,采用归一化GB色差法提取红提图像中的果梗,运用...为实现整串红提的紧实度无损检测和分级,提出基于机器视觉检测的分级方法,通过工业摄像头采集新鲜红提串的彩色(red green and blue,RGB)和近红外图像,对整串红提RGB图像的三通道进行提取,采用归一化GB色差法提取红提图像中的果梗,运用形态学重构及局部亮度极大值方法定位红提串中的各个果粒中心,同时提取每串红提的质心,选取果梗面积、红提果粒个数与果串面积之比、红提果粒与红提质心距离之和与果粒个数之比等特征参数,分别建立基于线性判别分析、集成学习算法和支持向量机的紧实度分类模型,经检验支持向量机模型分类效果最佳,应用该模型对130串红提进行紧实度检测和分类,分级正确率94.6%。结果表明该方法可为后续葡萄品质及产量预测提供参考。展开更多
In this study, we developed an energy security evaluation model(ESEM) from three dimensions, energy supply-transport security, safety of energy utilization, and stability of political-socioeconomic environment, based ...In this study, we developed an energy security evaluation model(ESEM) from three dimensions, energy supply-transport security, safety of energy utilization, and stability of political-socioeconomic environment, based on the integrated application of subjective and objective weight allocation technique. Then the spatial-temporal evolution of global energy security pattern and its driving mechanism was analyzed with the method above, and the results are shown as follows:(1) since the 1990 s, the spatial patterns of global energy security have shown a deteriorating trend, with the growth of countries in at-risk type and relatively at-risk type.(2) The spatial distribution of countries with secure energy system shows a strong stability, and these countries are concentrated persistently in Western Europe and North America. The spatial evolution of countries with relatively secure energy system also presents a strong stability, which are mainly distributed in the periphery of the secure ones, namely Central and Southern Europe, South America and Eurasia, while countries with general energy system are mainly distributed in Asia, Africa and Southern Europe, and the spatial-temporal evolution of this type is the main cause for the deterioration of world energy security pattern. Countries with at-risk and relatively at-risk energy system are mainly concentrated in Africa, Asia, the Middle East and Eurasia, rendering spatial extension to the east and south.(3) In the past 20 years, the mechanism for world’s energy security pattern formation gradually transforms from the ‘unitary dimension dominated’ to the ‘binary dimension-dominated’, and the main factors influencing the global energy security pattern become more diverse.(4) In the pattern of world’s energy security, China’s performance on energy security has been the global average since the 1990 s, which shows a decreasing trend in safety of energy utilization dimension. Findings in this study can provide a reference for the government in terms of formulating strategic responses and policy options.展开更多
文摘为实现整串红提的紧实度无损检测和分级,提出基于机器视觉检测的分级方法,通过工业摄像头采集新鲜红提串的彩色(red green and blue,RGB)和近红外图像,对整串红提RGB图像的三通道进行提取,采用归一化GB色差法提取红提图像中的果梗,运用形态学重构及局部亮度极大值方法定位红提串中的各个果粒中心,同时提取每串红提的质心,选取果梗面积、红提果粒个数与果串面积之比、红提果粒与红提质心距离之和与果粒个数之比等特征参数,分别建立基于线性判别分析、集成学习算法和支持向量机的紧实度分类模型,经检验支持向量机模型分类效果最佳,应用该模型对130串红提进行紧实度检测和分类,分级正确率94.6%。结果表明该方法可为后续葡萄品质及产量预测提供参考。
基金National Natural Science Foundation of China,No.41671126,No.41171147Special Funds for Scientific Research Institutes from Science&Technology Department of Fujian Province,No.2016R1032-5
文摘In this study, we developed an energy security evaluation model(ESEM) from three dimensions, energy supply-transport security, safety of energy utilization, and stability of political-socioeconomic environment, based on the integrated application of subjective and objective weight allocation technique. Then the spatial-temporal evolution of global energy security pattern and its driving mechanism was analyzed with the method above, and the results are shown as follows:(1) since the 1990 s, the spatial patterns of global energy security have shown a deteriorating trend, with the growth of countries in at-risk type and relatively at-risk type.(2) The spatial distribution of countries with secure energy system shows a strong stability, and these countries are concentrated persistently in Western Europe and North America. The spatial evolution of countries with relatively secure energy system also presents a strong stability, which are mainly distributed in the periphery of the secure ones, namely Central and Southern Europe, South America and Eurasia, while countries with general energy system are mainly distributed in Asia, Africa and Southern Europe, and the spatial-temporal evolution of this type is the main cause for the deterioration of world energy security pattern. Countries with at-risk and relatively at-risk energy system are mainly concentrated in Africa, Asia, the Middle East and Eurasia, rendering spatial extension to the east and south.(3) In the past 20 years, the mechanism for world’s energy security pattern formation gradually transforms from the ‘unitary dimension dominated’ to the ‘binary dimension-dominated’, and the main factors influencing the global energy security pattern become more diverse.(4) In the pattern of world’s energy security, China’s performance on energy security has been the global average since the 1990 s, which shows a decreasing trend in safety of energy utilization dimension. Findings in this study can provide a reference for the government in terms of formulating strategic responses and policy options.
