为提高苹果的产量和质量,防止病虫害对果实质量的影响,设计了一款基于机器视觉的苹果树病虫害智能识别系统。该系统采用交互式分割(GrabCut)算法对图像进行分割,然后使用高斯拉普拉斯算子和拉普拉斯高斯(Laplacian-of-Gaussian,LOG)算...为提高苹果的产量和质量,防止病虫害对果实质量的影响,设计了一款基于机器视觉的苹果树病虫害智能识别系统。该系统采用交互式分割(GrabCut)算法对图像进行分割,然后使用高斯拉普拉斯算子和拉普拉斯高斯(Laplacian-of-Gaussian,LOG)算法将苹果叶片中的病斑提取出来,最后将提取出的图像送入深度神经网络(deep neural networks,DNN)进行进一步的分析与处理,能够实时、方便地识别出苹果树叶病害中较为常见、发病率高的花叶病,锈病,灰斑病,斑点落叶病以及褐斑病。经测试,该系统对苹果树5种常见病虫害识别率精度高达91.17%。结果表明,该算法能够有效提升苹果树病虫害防治,优于基于卷积神经网络特征的区域方法(regions with CNN features,R-CNN)、YOLO(you only look once)等单一病虫害检测方法。展开更多
aquatic product, known as one of the good resources for white meat, has been widely accepted by the consumers due to its high protein, low fat, especially low cholesterol. With the fast development of living standards...aquatic product, known as one of the good resources for white meat, has been widely accepted by the consumers due to its high protein, low fat, especially low cholesterol. With the fast development of living standards around the world, the consumer demands for high quality, nutrition, safety and freshness of ifshery food are increasing. Thus, high efifcient preservation technologies for aquatic products become particularly important. Superchilling is one of the controlled-temperature preservation technologies for seafood. Aquatic products can be kept in better quality under superchilling conditions. This review introduced the principle and development of superchilling process, mainly focusing on research progresses and technical dififculties of superchilling. The growth mechanism of ice crystals and the feasibility of application of computational lfuid dynamics in analyzing the temperatures variation and ice crystals during superchilling progress were also discussed, which will provide theoretical foundation for its improvement and application.展开更多
We investigate charged hadron production at RHIC and LHC energies in the framework of color glass condensate.Our study gives a very good description of the experimental data of inclusive charged hadron production in p...We investigate charged hadron production at RHIC and LHC energies in the framework of color glass condensate.Our study gives a very good description of the experimental data of inclusive charged hadron production in proton–proton collisions at both RHIC and LHC energies.The saturation scale is treated as a free parameter,which will reduce the uncertainties from fitting low-energy experimental data and the modeling of the saturation momentum.We find a reasonable value of the saturation scale Q_(s)~1 GeV,which is consistent with the theoretical findings.The running coupling effect is taken into account,and it is found that it plays an important role in the description of the experimental data.We provide quantitative predictions of the rapidity dependence of the inclusive charged hadron production for the upcoming LHC experiment in proton–proton collisions at√s=14 TeV.展开更多
We perform a global analysis of the new combined data on inclusive structure functions in electron-proton scattering at small value of Bjorken x （x≤0.01） in the framework of the color glass condensate. The new comb...We perform a global analysis of the new combined data on inclusive structure functions in electron-proton scattering at small value of Bjorken x （x≤0.01） in the framework of the color glass condensate. The new combined HERA data at small-x are studied by an analytic proton structure function. It is shown that the theoretical results of the analytic proton structure function are in agreement with the new combined experimental data. The longitudinal proton structure function is investigated with the analytic expression. It is demonstrated that our approach shows a very good description of the longitudinal structure function experimental data, which is evidence showing the saturation effect is a domination mechanism during the rapidity evolution of the gluon density at high energy.展开更多
文摘为提高苹果的产量和质量,防止病虫害对果实质量的影响,设计了一款基于机器视觉的苹果树病虫害智能识别系统。该系统采用交互式分割(GrabCut)算法对图像进行分割,然后使用高斯拉普拉斯算子和拉普拉斯高斯(Laplacian-of-Gaussian,LOG)算法将苹果叶片中的病斑提取出来,最后将提取出的图像送入深度神经网络(deep neural networks,DNN)进行进一步的分析与处理,能够实时、方便地识别出苹果树叶病害中较为常见、发病率高的花叶病,锈病,灰斑病,斑点落叶病以及褐斑病。经测试,该系统对苹果树5种常见病虫害识别率精度高达91.17%。结果表明,该算法能够有效提升苹果树病虫害防治,优于基于卷积神经网络特征的区域方法(regions with CNN features,R-CNN)、YOLO(you only look once)等单一病虫害检测方法。
基金financial support of this study from the National Key Technologies R&D Program of China during the 12th Five-Year Plan period (2012BAD38B09)the National Natural Science Foundation of China (NSFC31301417)
文摘aquatic product, known as one of the good resources for white meat, has been widely accepted by the consumers due to its high protein, low fat, especially low cholesterol. With the fast development of living standards around the world, the consumer demands for high quality, nutrition, safety and freshness of ifshery food are increasing. Thus, high efifcient preservation technologies for aquatic products become particularly important. Superchilling is one of the controlled-temperature preservation technologies for seafood. Aquatic products can be kept in better quality under superchilling conditions. This review introduced the principle and development of superchilling process, mainly focusing on research progresses and technical dififculties of superchilling. The growth mechanism of ice crystals and the feasibility of application of computational lfuid dynamics in analyzing the temperatures variation and ice crystals during superchilling progress were also discussed, which will provide theoretical foundation for its improvement and application.
基金Supported by the Guizhou Normal University Doctoral Research Fund,Guizhou Science Foundation(Grant No J-LKS[2009]15,J[2010]2145 and J[2013]2217)the National Natural Science Foundation of China under Grant Nos 11020101060 and 10635020,the CCNU2011(Key Project)the Program of Introducing Talents of Discipline to Universities of China(B08033)。
文摘We investigate charged hadron production at RHIC and LHC energies in the framework of color glass condensate.Our study gives a very good description of the experimental data of inclusive charged hadron production in proton–proton collisions at both RHIC and LHC energies.The saturation scale is treated as a free parameter,which will reduce the uncertainties from fitting low-energy experimental data and the modeling of the saturation momentum.We find a reasonable value of the saturation scale Q_(s)~1 GeV,which is consistent with the theoretical findings.The running coupling effect is taken into account,and it is found that it plays an important role in the description of the experimental data.We provide quantitative predictions of the rapidity dependence of the inclusive charged hadron production for the upcoming LHC experiment in proton–proton collisions at√s=14 TeV.
基金Supported by the Guizhou Normal University Doctoral Research Fund under Grant No J[201312217, the National Natural Science Foundation of China under Grant Nos 11305040, 11375071 and IRGl1221504, the National Basic Research Program of China under Grant No 2013CB837803, and the Basic Research Program of Central China Normal University under Grant No CCNU13F026.
文摘We perform a global analysis of the new combined data on inclusive structure functions in electron-proton scattering at small value of Bjorken x （x≤0.01） in the framework of the color glass condensate. The new combined HERA data at small-x are studied by an analytic proton structure function. It is shown that the theoretical results of the analytic proton structure function are in agreement with the new combined experimental data. The longitudinal proton structure function is investigated with the analytic expression. It is demonstrated that our approach shows a very good description of the longitudinal structure function experimental data, which is evidence showing the saturation effect is a domination mechanism during the rapidity evolution of the gluon density at high energy.
