Edible blend oil market is confused at present.It has some problems such as confusing concepts,randomly named,shoddy and especially the fuzzy standard of compositions and ratios in blend oil.The national standard fail...Edible blend oil market is confused at present.It has some problems such as confusing concepts,randomly named,shoddy and especially the fuzzy standard of compositions and ratios in blend oil.The national standard fails to come on time after eight years.The basic reason is the lack of qualitative and quantitative detection of vegetable oils in blend oil.Edible blend oil is mixed by different vegetable oils according to a certain proportion.Its nutrition is rich.Blend oil is eaten frequently in daily life.Different vegetable oil contains a certain components.The mixed vegetable oil can make full use of their nutrients and make the nutrients more balanced in blend oil.It is conducive to people's health.It is an effectively way to monitor blend oil market by the accurate determination of single vegetable oil content in blend oil.The types of blend oil are known,so we only need for accurate determination of its content.Three dimensional fluorescence spectra are used for the contents in blend oil.A new method of data processing is proposed with calculation of characteristics peak value integration in chosen characteristic area based on Quasi-Monte Carlo method,combined with Neural network method to solve nonlinear equations to obtain single vegetable oil content in blend oil.Peanut oil,soybean oil and sunflower oil are used as research object to reconcile into edible blend oil,with single oil regarded whole,not considered each oil's components.Recovery rates of 10 configurations of edible harmonic oil is measured to verify the validity of the method of characteristics peak value integration.An effective method is provided to detect components content of complex mixture in high sensitivity.Accuracy of recovery rats is increased,compared the common method of solution of linear equations used to detect components content of mixture.It can be used in the testing of kinds and content of edible vegetable oil in blend oil for the food quality detection,and provide an effective reference for the creation of national standards.展开更多
This study addresses the morphometric variables that determine the sediment yield in Wadi AI-Arja through the analysis of the impact of different morphometric characteristics along the course of the valley on its sedi...This study addresses the morphometric variables that determine the sediment yield in Wadi AI-Arja through the analysis of the impact of different morphometric characteristics along the course of the valley on its sediment yield, as well as the analysis of spatial and formal dimensions and morphologies of the basin and its relationship to the sediment yield. The study also addresses the size of variation in the volume of sediment yield of the river tributaries that make up the water network of the valley under the differences of its mor- phometric and hydrological characteristics. The study found several results, most notably： The classification of Wadi AI-Arja basin according to the hypsometric integral value （72.1%） within an uneven topography, which in- creases the force of the erosive activity and the size of the sediment yield if the basin was exposed to moist climatic periods. The study also showed the presence of convergence in the intra-spaces between the river tributaries in the water network. This increases the volume of water flows when these tributaries meet with each other and thus increasing their erosive ability and sediment yield. The study also showed the presence of marked variation in the sediment yield of the river tributaries depending on the differences in its morphometric characteristics. The results of the step-wise regression analysis confirmed the importance of the morphometric and hydrological variables, and plant coverage in interpreting the variation in the size of the sediment yield of the river tributaries of different stream order in Wadi AI-Arja basin, where these variables interpreted 43% of the total variation, with statistical significance less than 0.05.展开更多
In this article, by introducing characteristic singular integral operator and associate singular integral equations （SIEs）, the authors discuss the direct method of solution for a class of singular integral equation...In this article, by introducing characteristic singular integral operator and associate singular integral equations （SIEs）, the authors discuss the direct method of solution for a class of singular integral equations with certain analytic inputs. They obtain both the conditions of solvability and the solutions in closed form. It is noteworthy that the method is different from the classical one that is due to Lu.展开更多
Under the appropriate hypotheses subject to the unknown function and the free term, by means of our Lemma, we prove the rationality of order at x = ∞ on two sides for the characteristic singular integral equations wi...Under the appropriate hypotheses subject to the unknown function and the free term, by means of our Lemma, we prove the rationality of order at x = ∞ on two sides for the characteristic singular integral equations with solutions having singularities of higher order on the real axis X. We transform the equations into solving equivalent Riemann boundary value problems with solutions having singularities of higher order and with additional conditions on X. The solutions and the solvable conditions for the former are obtained from the latter.展开更多
In this paper, solutions of Riemann boundary value problems with nodes are extended to the case where they may have singularties of high order at the nodes. Moreover, further extension is discussed when the free term ...In this paper, solutions of Riemann boundary value problems with nodes are extended to the case where they may have singularties of high order at the nodes. Moreover, further extension is discussed when the free term of the problem involved also possesses singularities at the nodes. As an application, certain singular integral equation is discussed.展开更多
One-dimensional(1D)transition-metal dichalcogenide(TMDC)nanoribbons are appealing for a plethora of emergent physics and innovative high-tech applications unattainable with their two-dimensional(_(2)D)and bulk counter...One-dimensional(1D)transition-metal dichalcogenide(TMDC)nanoribbons are appealing for a plethora of emergent physics and innovative high-tech applications unattainable with their two-dimensional(_(2)D)and bulk counterparts.Despite notable progress in synthesizing TMDC monolayer nanoribbons,the production of TMDC heterostructure nanoribbons,which can integrate the best characteristics of the constituent monolayers,remains elusive.展开更多
基金supported by the National Natural Science Foundation of China(61471312)the National Natural Science Foundation of Hebei(F2012203189,F2015203072,C2014203212)
文摘Edible blend oil market is confused at present.It has some problems such as confusing concepts,randomly named,shoddy and especially the fuzzy standard of compositions and ratios in blend oil.The national standard fails to come on time after eight years.The basic reason is the lack of qualitative and quantitative detection of vegetable oils in blend oil.Edible blend oil is mixed by different vegetable oils according to a certain proportion.Its nutrition is rich.Blend oil is eaten frequently in daily life.Different vegetable oil contains a certain components.The mixed vegetable oil can make full use of their nutrients and make the nutrients more balanced in blend oil.It is conducive to people's health.It is an effectively way to monitor blend oil market by the accurate determination of single vegetable oil content in blend oil.The types of blend oil are known,so we only need for accurate determination of its content.Three dimensional fluorescence spectra are used for the contents in blend oil.A new method of data processing is proposed with calculation of characteristics peak value integration in chosen characteristic area based on Quasi-Monte Carlo method,combined with Neural network method to solve nonlinear equations to obtain single vegetable oil content in blend oil.Peanut oil,soybean oil and sunflower oil are used as research object to reconcile into edible blend oil,with single oil regarded whole,not considered each oil's components.Recovery rates of 10 configurations of edible harmonic oil is measured to verify the validity of the method of characteristics peak value integration.An effective method is provided to detect components content of complex mixture in high sensitivity.Accuracy of recovery rats is increased,compared the common method of solution of linear equations used to detect components content of mixture.It can be used in the testing of kinds and content of edible vegetable oil in blend oil for the food quality detection,and provide an effective reference for the creation of national standards.
文摘This study addresses the morphometric variables that determine the sediment yield in Wadi AI-Arja through the analysis of the impact of different morphometric characteristics along the course of the valley on its sediment yield, as well as the analysis of spatial and formal dimensions and morphologies of the basin and its relationship to the sediment yield. The study also addresses the size of variation in the volume of sediment yield of the river tributaries that make up the water network of the valley under the differences of its mor- phometric and hydrological characteristics. The study found several results, most notably： The classification of Wadi AI-Arja basin according to the hypsometric integral value （72.1%） within an uneven topography, which in- creases the force of the erosive activity and the size of the sediment yield if the basin was exposed to moist climatic periods. The study also showed the presence of convergence in the intra-spaces between the river tributaries in the water network. This increases the volume of water flows when these tributaries meet with each other and thus increasing their erosive ability and sediment yield. The study also showed the presence of marked variation in the sediment yield of the river tributaries depending on the differences in its morphometric characteristics. The results of the step-wise regression analysis confirmed the importance of the morphometric and hydrological variables, and plant coverage in interpreting the variation in the size of the sediment yield of the river tributaries of different stream order in Wadi AI-Arja basin, where these variables interpreted 43% of the total variation, with statistical significance less than 0.05.
基金Project was supported by RFDP of Higher Education and NNSF of China, SF of Wuhan University
文摘In this article, by introducing characteristic singular integral operator and associate singular integral equations （SIEs）, the authors discuss the direct method of solution for a class of singular integral equations with certain analytic inputs. They obtain both the conditions of solvability and the solutions in closed form. It is noteworthy that the method is different from the classical one that is due to Lu.
基金Supported by the National Natural Science Foundation of China (10471107)the Specialized Research Fund for the Doctoral Program of Higher Education of China (20060486001)
文摘Under the appropriate hypotheses subject to the unknown function and the free term, by means of our Lemma, we prove the rationality of order at x = ∞ on two sides for the characteristic singular integral equations with solutions having singularities of higher order on the real axis X. We transform the equations into solving equivalent Riemann boundary value problems with solutions having singularities of higher order and with additional conditions on X. The solutions and the solvable conditions for the former are obtained from the latter.
文摘In this paper, solutions of Riemann boundary value problems with nodes are extended to the case where they may have singularties of high order at the nodes. Moreover, further extension is discussed when the free term of the problem involved also possesses singularities at the nodes. As an application, certain singular integral equation is discussed.
基金supported by the National Natural Science Foundation of China(Grant Nos.12422402,61888102,and 12274447)the National Key R&D Program of China(Grant No.2021YFA1202900)+1 种基金the Strategic Priority Research Program of Chinese Academy of Sciences(Grant No.XDB0470101)the Guangdong Major Project of Basic and Applied Basic Research(Grant No.2021B0301030002)。
文摘One-dimensional(1D)transition-metal dichalcogenide(TMDC)nanoribbons are appealing for a plethora of emergent physics and innovative high-tech applications unattainable with their two-dimensional(_(2)D)and bulk counterparts.Despite notable progress in synthesizing TMDC monolayer nanoribbons,the production of TMDC heterostructure nanoribbons,which can integrate the best characteristics of the constituent monolayers,remains elusive.
