At present,Zibo is in the critical stage of rural revitalization.In order to accelerate the development of modern vegetable industry and promote rural revitalization,Zibo City Vegetable Office organized special person...At present,Zibo is in the critical stage of rural revitalization.In order to accelerate the development of modern vegetable industry and promote rural revitalization,Zibo City Vegetable Office organized special personnel to carry out this survey.This survey report comprehensively analyzed the current development situation of vegetable industry in Zibo City:the industrial structure has been constantly optimized,the standardization has made new breakthroughs,the project implementation has achieved remarkable results,and the technological level has realized constant improvement.It found out the problems that restrict the development of modern vegetables in Zibo City:small-scale scattered planting accounts for a large proportion,vegetable output rate is not high,product quality supervision is difficult,and some vegetable farmers are low in technological quality.In view of the current situation and existing problems of vegetable development in Zibo City,it came up with recommendations for accelerating the development of modern vegetable industry,including driving through project leading,to achieving innovative development,accelerating scientific and technological training and strengthening talent support,developing new organizations to promote industrial upgrading,strengthening quality supervision and improving vegetable quality,and industrial integration and development to expand and strengthen the vegetable industry.展开更多
Solar irradiation can efficiently promote the kinetics of the oxygen evolution reaction(OER)during water splitting,where heterojunction catalysts exhibit excellent photoresponsive properties.However,insights into the ...Solar irradiation can efficiently promote the kinetics of the oxygen evolution reaction(OER)during water splitting,where heterojunction catalysts exhibit excellent photoresponsive properties.However,insights into the origins of photoassisted OER catalysis remain unclear,especially the interfaced promotion under convergent solar irradiation(CSI).Herein,novel allotropic Co_(5.47)N/CoN heterojunctions were synthesized,and corresponding OER mechanisms under CSI were comprehensively uncovered from physical and chemical aspects using the in situ Raman technique and electrochemical cyclic voltammetry method.Our results provide a unique mechanism where high-energy UV light promotes the Co^(3+/4+)conversion process in addition to the ordinary photoelectric effect excitation of the Co^(2+)material.Importantly,visible light under CSI can produce a photothermal effect for Co^(2+)excitation and Co^(3+/4+)conversion,which promotes the OER significantly more than the usual photoelectric effect.As a result,Co_(5.47)N/CoN(containing 28%CoN)obtained 317.9%OER enhancement,which provides a pathway for constructing excellent OER catalysts.展开更多
Refined composite multi-scale dispersion entropy(RCMDE),as a new and effective nonlinear dynamic method,has been applied in the field of medical diagnosis and fault diagnosis.In this paper,we first introduce RCMDE int...Refined composite multi-scale dispersion entropy(RCMDE),as a new and effective nonlinear dynamic method,has been applied in the field of medical diagnosis and fault diagnosis.In this paper,we first introduce RCMDE into the field of underwater acoustic signal processing for complexity feature extraction of ship radiated noise,and then propose a novel classification method for ship-radiated noise based on RCMDE and k-nearest neighbor(KNN),termed RCMDE-KNN.The results of a comparative experiment show that the proposed RCMDE-KNN classification method can effectively extract the complexity features of ship-radiated noise,and has better classification performance under one and two scales than the other three classification methods based on multi-scale permutation entropy(MPE)and KNN,multi-scale weighted-permutation entropy(MW-PE)and KNN,and multi-scale dispersion entropy(MDE)and KNN,termed MPE-KNN,MW-PE-KNN,and MDE-KNN.It is proved that the RCMDE-KNN classification method for ship-radiated noise is feasible and effective,and can obtain a very high recognition rate.展开更多
[Objectives]To select zucchini varieties suitable for cultivation in Zibo City and test its high-yield cultivation techniques.[Methods]Six zucchini varieties were introduced,and their commercial quality and yield were...[Objectives]To select zucchini varieties suitable for cultivation in Zibo City and test its high-yield cultivation techniques.[Methods]Six zucchini varieties were introduced,and their commercial quality and yield were determined.[Results]The yield of Shengfeier,Xiuyu 170 and Xihulu 309 increased by 11.4%,6.9%and 4.6%,respectively compared with S68(control),and zucchini was straight,looked pleasing to the eye,and had strong disease resistance.[Conclusions]The zucchini varieties were selected and the high-quality,high-yield and high-efficiency cultivation techniques were integrated.展开更多
[Objectives]The study aims to verify the application effect of silicon-containing water-soluble fertilizer on fast vegetables.[Methods]Two vegetable crops,rape and lettuce,were studied,and three treatments were set up...[Objectives]The study aims to verify the application effect of silicon-containing water-soluble fertilizer on fast vegetables.[Methods]Two vegetable crops,rape and lettuce,were studied,and three treatments were set up,including treatment 1(conventional fertilization+foliar spraying of silicon-containing water-soluble fertilizer,treatment 2(conventional fertilization+foliar spraying of the same amount of clear water),and treatment 3(conventional fertilization).[Results]The yield of lettuce and rape in treatment 1 increased by 15.1%and 8.6%,respectively;compared with treatment 3,the yield of lettuce and rape rose by 18.6%and 10.9%,respectively.Variance analysis shows that the F values of lettuce and rape were 20.938 and 35.372,respectively,and the differences among various treatments were extremely significant.[Conclusions]The application of silicon-containing water-soluble fertilizer on lettuce and rape significantly increased their yield.展开更多
Based on a field observation on vessel transit path of three bridges over the Yangtze River in the Three Gorges Reservoir,and an analysis of the geometric probabilistic model of transiting vessels in collision probabi...Based on a field observation on vessel transit path of three bridges over the Yangtze River in the Three Gorges Reservoir,and an analysis of the geometric probabilistic model of transiting vessels in collision probability calculation,the aberrancy angle and vessel velocity probabilistic model related with impact force,a probabilistic model is established and also verified by goodness-of-fit test.The vessel transit path distribution can be expressed by the normal distribution model.For the Three Gorges Reservoir,the mean and standard deviation adopt 0.2w and 0.1w,respectively(w is the channel width).The aberrancy angle distribution of vessels accepts maximum I distribution model,and its distribution parameters can be taken as 0.314 and 4.354.The velocity distribution of up-bound and down-bound vessels can also be expressed by the normal distribution model.展开更多
文摘At present,Zibo is in the critical stage of rural revitalization.In order to accelerate the development of modern vegetable industry and promote rural revitalization,Zibo City Vegetable Office organized special personnel to carry out this survey.This survey report comprehensively analyzed the current development situation of vegetable industry in Zibo City:the industrial structure has been constantly optimized,the standardization has made new breakthroughs,the project implementation has achieved remarkable results,and the technological level has realized constant improvement.It found out the problems that restrict the development of modern vegetables in Zibo City:small-scale scattered planting accounts for a large proportion,vegetable output rate is not high,product quality supervision is difficult,and some vegetable farmers are low in technological quality.In view of the current situation and existing problems of vegetable development in Zibo City,it came up with recommendations for accelerating the development of modern vegetable industry,including driving through project leading,to achieving innovative development,accelerating scientific and technological training and strengthening talent support,developing new organizations to promote industrial upgrading,strengthening quality supervision and improving vegetable quality,and industrial integration and development to expand and strengthen the vegetable industry.
基金supported by the National Natural Science Foundation of China(No.51872068)the Graduate Innovation Project of Harbin Normal University(No.HSDBSCX2021-12 and HSDSSCX2022-51)+3 种基金the Postgraduate Education and Teaching Reform Project of Harbin Normal Universitythe Joint Guidance Project of the Natural Science Foundation of Heilongjiang Province,China(No.LH2022E093)the Heilongjiang Province Col ege students innovation and entrepreneurship training Program(S202210231110S202210231090)
文摘Solar irradiation can efficiently promote the kinetics of the oxygen evolution reaction(OER)during water splitting,where heterojunction catalysts exhibit excellent photoresponsive properties.However,insights into the origins of photoassisted OER catalysis remain unclear,especially the interfaced promotion under convergent solar irradiation(CSI).Herein,novel allotropic Co_(5.47)N/CoN heterojunctions were synthesized,and corresponding OER mechanisms under CSI were comprehensively uncovered from physical and chemical aspects using the in situ Raman technique and electrochemical cyclic voltammetry method.Our results provide a unique mechanism where high-energy UV light promotes the Co^(3+/4+)conversion process in addition to the ordinary photoelectric effect excitation of the Co^(2+)material.Importantly,visible light under CSI can produce a photothermal effect for Co^(2+)excitation and Co^(3+/4+)conversion,which promotes the OER significantly more than the usual photoelectric effect.As a result,Co_(5.47)N/CoN(containing 28%CoN)obtained 317.9%OER enhancement,which provides a pathway for constructing excellent OER catalysts.
基金supported by National Natural Science Foundation of China(No.61871318 and 61833013)Shaanxi Provincial Key Research and Development Project(No.2019GY-099).
文摘Refined composite multi-scale dispersion entropy(RCMDE),as a new and effective nonlinear dynamic method,has been applied in the field of medical diagnosis and fault diagnosis.In this paper,we first introduce RCMDE into the field of underwater acoustic signal processing for complexity feature extraction of ship radiated noise,and then propose a novel classification method for ship-radiated noise based on RCMDE and k-nearest neighbor(KNN),termed RCMDE-KNN.The results of a comparative experiment show that the proposed RCMDE-KNN classification method can effectively extract the complexity features of ship-radiated noise,and has better classification performance under one and two scales than the other three classification methods based on multi-scale permutation entropy(MPE)and KNN,multi-scale weighted-permutation entropy(MW-PE)and KNN,and multi-scale dispersion entropy(MDE)and KNN,termed MPE-KNN,MW-PE-KNN,and MDE-KNN.It is proved that the RCMDE-KNN classification method for ship-radiated noise is feasible and effective,and can obtain a very high recognition rate.
文摘[Objectives]To select zucchini varieties suitable for cultivation in Zibo City and test its high-yield cultivation techniques.[Methods]Six zucchini varieties were introduced,and their commercial quality and yield were determined.[Results]The yield of Shengfeier,Xiuyu 170 and Xihulu 309 increased by 11.4%,6.9%and 4.6%,respectively compared with S68(control),and zucchini was straight,looked pleasing to the eye,and had strong disease resistance.[Conclusions]The zucchini varieties were selected and the high-quality,high-yield and high-efficiency cultivation techniques were integrated.
文摘[Objectives]The study aims to verify the application effect of silicon-containing water-soluble fertilizer on fast vegetables.[Methods]Two vegetable crops,rape and lettuce,were studied,and three treatments were set up,including treatment 1(conventional fertilization+foliar spraying of silicon-containing water-soluble fertilizer,treatment 2(conventional fertilization+foliar spraying of the same amount of clear water),and treatment 3(conventional fertilization).[Results]The yield of lettuce and rape in treatment 1 increased by 15.1%and 8.6%,respectively;compared with treatment 3,the yield of lettuce and rape rose by 18.6%and 10.9%,respectively.Variance analysis shows that the F values of lettuce and rape were 20.938 and 35.372,respectively,and the differences among various treatments were extremely significant.[Conclusions]The application of silicon-containing water-soluble fertilizer on lettuce and rape significantly increased their yield.
文摘Based on a field observation on vessel transit path of three bridges over the Yangtze River in the Three Gorges Reservoir,and an analysis of the geometric probabilistic model of transiting vessels in collision probability calculation,the aberrancy angle and vessel velocity probabilistic model related with impact force,a probabilistic model is established and also verified by goodness-of-fit test.The vessel transit path distribution can be expressed by the normal distribution model.For the Three Gorges Reservoir,the mean and standard deviation adopt 0.2w and 0.1w,respectively(w is the channel width).The aberrancy angle distribution of vessels accepts maximum I distribution model,and its distribution parameters can be taken as 0.314 and 4.354.The velocity distribution of up-bound and down-bound vessels can also be expressed by the normal distribution model.
