Based on the generalized vector meson dominance model in QCD, we study photoproduction of vector meson T off the proton by use of the QCD inspired model in which the contributions from quark-quark, gluon-gluon, and qu...Based on the generalized vector meson dominance model in QCD, we study photoproduction of vector meson T off the proton by use of the QCD inspired model in which the contributions from quark-quark, gluon-gluon, and quark-gluon interference term to observable are taken into consideration. Calculations are performed for total cross section σtot, differential cross section dσ/dt, ratio of the real part to imaginary part of forward scattering amplitude ρ, and nuclear slop parameter function β. The mediators of interactions between projectiles （the quark and antiquark pair fluctuated from the real the photon） and the proton target （three-quark system） are the tensor Glueball and Odderon instead of using the usual Pomeron exchange. The theoretical predictions for σtot （s） are consistent with the experimental data within error bars of the data. The data for dσ/dt, ρ, and β are urgently needed.展开更多
Based on the quark-gluon contents of nucleon and strongly believing that the force mediators,Pomeronand its counterpart in the conventional approach of Regge theory,for high energy diffractive process would be the ten...Based on the quark-gluon contents of nucleon and strongly believing that the force mediators,Pomeronand its counterpart in the conventional approach of Regge theory,for high energy diffractive process would be the tensorglueball and Odderon respectively,we discuss photo-production of vector meson φ off the deuteron at energy less than 3GeV in the QCD inspired model in which the quark gluon degrees of freedom and glueball,Odderon exchange are takeninto account.A calculation is performed for γ + D →φ + D,and the theoretical predictions of the differential crosssection dσ^(γD)) /dt,are presented and compared with available experimental data.Our QCD inspired model reproducesdata quite well in the whole range of the experimental measurements up to |t| ■0.4 GeV.Our results can be used toextract γn→φn data,which cannot be measured in experiment.展开更多
To provide a theoretical basis for further improvement of Brassica napus yield, additive dominance with additive - by - additive epistatic effects （ ADAA） genetic model and a 6 X 8 partial dial- lel cross des...To provide a theoretical basis for further improvement of Brassica napus yield, additive dominance with additive - by - additive epistatic effects （ ADAA） genetic model and a 6 X 8 partial dial- lel cross design were used to analyze the genetic effects and correlations of five yield related traits of 14 excellent Brassica napus parental lines and their 46 and F2 populations. The results showed that silique density （SD） , siliques per plant （SPP） , seeds per silique （SPS） and thousand - seed weight （TSW） exhibited not only additive and dominant effects, but also significant epistatic effects. The dominant effects of all five yield - related traits were obviously greater than their additive effects and epistatic effects. Yield per plant （YPP） showed significant genetic correlation with SD, SPP and SPS, and the main component of the genetic correlation was the dominance correlation. SPP and SPS both showed a significant negative correlation with TSW. The SD of rapeseed was genetically correlated with all three components of yield to a certain extent, and there were different components of genetic effects positively correlated with the three yield components, indicating that SD is a potential trait to reconcile the conflict between TSW and SPP as well as SPS.展开更多
Considering the cost of logistic service and the‘Free Shipping’strategy,two models of E-supply chain,respectively dominated by e-commerce platform or manufacturer are constructed,and the optimal decisions for each m...Considering the cost of logistic service and the‘Free Shipping’strategy,two models of E-supply chain,respectively dominated by e-commerce platform or manufacturer are constructed,and the optimal decisions for each model is calculated in this paper.The research indicates that:the sales price is lower and the profit of manufacturer is higher in the mode dominated by manufacturer.On the other hand,the platform’s service-level is lower and the profit of platform is higher in the mode dominated by dominant platform.Further,the sales price,platform’s service and platform’s profit will increase with the growth of commission and decrease with the service cost elasticity coefficient.Contrarily,the profit of manufacturer will decrease with the growth of commission but increase with elasticity coefficient.And,the logistic price and profit of logistic enterprise are higher in the mode dominated by manufacturer,moreover,they will decrease with the growth of commission.展开更多
One of the key problems in a vision-based gesture recognition system is the extraction of spatial-temporal features of gesturing. In this paper anapproach of motion-based segmentation is proposed to realize this task....One of the key problems in a vision-based gesture recognition system is the extraction of spatial-temporal features of gesturing. In this paper anapproach of motion-based segmentation is proposed to realize this task. The directmethod cooperated with the robust M-estimator to estimate the affine parametersof gesturing motion is used, and based on the dominant motion model the gesturingregion is extracted, i.e., the dominant object. So the spatial-temporal features ofgestures can be extracted. Finally, the dynamic time warping (DTW) method isdirectly used to perform matching of 12 control gestures (6 for 'translation' orders,6 for 'rotation' orders). A small demonstration system has been set up to verify themethod, in which a panorama image viewer can be controlled (set by mosaicing asequence of standard 'Garden' images) with recognized gestures instead of the 3-Dmouse tool.展开更多
Background What factors,processes and mechanisms regulate invasive processes and their efects?This is one of the main questions addressed by the ecology of biological invasions.Ligustrum lucidum,a tree species native ...Background What factors,processes and mechanisms regulate invasive processes and their efects?This is one of the main questions addressed by the ecology of biological invasions.Ligustrum lucidum,a tree species native to East Asia,became an aggressive invader of subtropical and temperate forests around the world.We analyzed here the L.lucidum invasion in Uruguayan forests to determine the factors controlling two stages of the invasive process,the establishment,and the dominance.Establishment was assessed by the occurrence,measured in 1525,1×1 kmcells,and dominance by remotely measuring the L.lucidum coverage at the forest canopy in 5554,1×1 km-cells.The occurrence and dominance were modeled using Generalized Linear Models in function of independent environmental and geographic variables.Results Ligustrum lucidum has become established in 13.4%of the Uruguayan forests and has dominated the forest canopy in 1.2%.Our models explained 45%and 35%of the occurrence and dominance spatial variance respectively and detected in both cases strong difusion patterns from the S-SW region to rest of Uruguay.Occurrence increased mainly in function of urban areas,and with the proximity to towns,probably because L.lucidum trees planted in gardens are seed sources,and near railways and highways,that could function as biological corridors.Occurrence also increased in loamy soils and near rivers,suggesting moisture conditions are favorable for establishment.Dominance increased with reduced forest area,in high productive soils and at higher altitudes.Moreover,dominance increased near urban areas,roads,and railways,as well as in highly aforested landscapes,and in loamy and low-rockiness soils.Conclusions The invasion of Uruguayan forests by L.lucidum is in the spread and impact stages,currently in expansion from the invasion focus on the S-SW region,where the oldest urbanizations are settled,towards the rest of the country.The geographic proximity to the invasion focus is currently the main predictor of both L.lucidum establishment and dominance.Additionally,whereas establishment is manly facilitated by human infrastructures improving propagule pressure and dispersion,dominance is enhanced in small or fragmented forest patches,in richnutrient soils,and at higher altitudes,suggesting ecosystem resistance is also operating.展开更多
基金Supported by National Natural Science Foundation of China under Grant Nos.10647002,10565001the Guangxi Natural Science Foundation under Grant Nos.0575020,0542042,and 0481030
文摘Based on the generalized vector meson dominance model in QCD, we study photoproduction of vector meson T off the proton by use of the QCD inspired model in which the contributions from quark-quark, gluon-gluon, and quark-gluon interference term to observable are taken into consideration. Calculations are performed for total cross section σtot, differential cross section dσ/dt, ratio of the real part to imaginary part of forward scattering amplitude ρ, and nuclear slop parameter function β. The mediators of interactions between projectiles （the quark and antiquark pair fluctuated from the real the photon） and the proton target （three-quark system） are the tensor Glueball and Odderon instead of using the usual Pomeron exchange. The theoretical predictions for σtot （s） are consistent with the experimental data within error bars of the data. The data for dσ/dt, ρ, and β are urgently needed.
基金Supported by National Natural Science Foundation of China under Grant Nos.10647002 and 10565001
文摘Based on the quark-gluon contents of nucleon and strongly believing that the force mediators,Pomeronand its counterpart in the conventional approach of Regge theory,for high energy diffractive process would be the tensorglueball and Odderon respectively,we discuss photo-production of vector meson φ off the deuteron at energy less than 3GeV in the QCD inspired model in which the quark gluon degrees of freedom and glueball,Odderon exchange are takeninto account.A calculation is performed for γ + D →φ + D,and the theoretical predictions of the differential crosssection dσ^(γD)) /dt,are presented and compared with available experimental data.Our QCD inspired model reproducesdata quite well in the whole range of the experimental measurements up to |t| ■0.4 GeV.Our results can be used toextract γn→φn data,which cannot be measured in experiment.
基金This research was supported by the National Basic Research Program of China （ 973 Program, 2011CB109302）；the National High - Tech R＆D Pro-gram of China （863 Program, 2011AA10A104, 2012AA101107） ； Natural Science Foundation of Hu-bei Province （2015CFA103） ； Hubei Agricultural Science and Technology Innovation Center.
文摘To provide a theoretical basis for further improvement of Brassica napus yield, additive dominance with additive - by - additive epistatic effects （ ADAA） genetic model and a 6 X 8 partial dial- lel cross design were used to analyze the genetic effects and correlations of five yield related traits of 14 excellent Brassica napus parental lines and their 46 and F2 populations. The results showed that silique density （SD） , siliques per plant （SPP） , seeds per silique （SPS） and thousand - seed weight （TSW） exhibited not only additive and dominant effects, but also significant epistatic effects. The dominant effects of all five yield - related traits were obviously greater than their additive effects and epistatic effects. Yield per plant （YPP） showed significant genetic correlation with SD, SPP and SPS, and the main component of the genetic correlation was the dominance correlation. SPP and SPS both showed a significant negative correlation with TSW. The SD of rapeseed was genetically correlated with all three components of yield to a certain extent, and there were different components of genetic effects positively correlated with the three yield components, indicating that SD is a potential trait to reconcile the conflict between TSW and SPP as well as SPS.
基金This work was supported by the National Natural Science Foundation of China[grant number 71501111],[grant number 71361002]Natural Science Foundation of Shandong Province under[grant number ZR2014JL046].
文摘Considering the cost of logistic service and the‘Free Shipping’strategy,two models of E-supply chain,respectively dominated by e-commerce platform or manufacturer are constructed,and the optimal decisions for each model is calculated in this paper.The research indicates that:the sales price is lower and the profit of manufacturer is higher in the mode dominated by manufacturer.On the other hand,the platform’s service-level is lower and the profit of platform is higher in the mode dominated by dominant platform.Further,the sales price,platform’s service and platform’s profit will increase with the growth of commission and decrease with the service cost elasticity coefficient.Contrarily,the profit of manufacturer will decrease with the growth of commission but increase with elasticity coefficient.And,the logistic price and profit of logistic enterprise are higher in the mode dominated by manufacturer,moreover,they will decrease with the growth of commission.
文摘One of the key problems in a vision-based gesture recognition system is the extraction of spatial-temporal features of gesturing. In this paper anapproach of motion-based segmentation is proposed to realize this task. The directmethod cooperated with the robust M-estimator to estimate the affine parametersof gesturing motion is used, and based on the dominant motion model the gesturingregion is extracted, i.e., the dominant object. So the spatial-temporal features ofgestures can be extracted. Finally, the dynamic time warping (DTW) method isdirectly used to perform matching of 12 control gestures (6 for 'translation' orders,6 for 'rotation' orders). A small demonstration system has been set up to verify themethod, in which a panorama image viewer can be controlled (set by mosaicing asequence of standard 'Garden' images) with recognized gestures instead of the 3-Dmouse tool.
文摘Background What factors,processes and mechanisms regulate invasive processes and their efects?This is one of the main questions addressed by the ecology of biological invasions.Ligustrum lucidum,a tree species native to East Asia,became an aggressive invader of subtropical and temperate forests around the world.We analyzed here the L.lucidum invasion in Uruguayan forests to determine the factors controlling two stages of the invasive process,the establishment,and the dominance.Establishment was assessed by the occurrence,measured in 1525,1×1 kmcells,and dominance by remotely measuring the L.lucidum coverage at the forest canopy in 5554,1×1 km-cells.The occurrence and dominance were modeled using Generalized Linear Models in function of independent environmental and geographic variables.Results Ligustrum lucidum has become established in 13.4%of the Uruguayan forests and has dominated the forest canopy in 1.2%.Our models explained 45%and 35%of the occurrence and dominance spatial variance respectively and detected in both cases strong difusion patterns from the S-SW region to rest of Uruguay.Occurrence increased mainly in function of urban areas,and with the proximity to towns,probably because L.lucidum trees planted in gardens are seed sources,and near railways and highways,that could function as biological corridors.Occurrence also increased in loamy soils and near rivers,suggesting moisture conditions are favorable for establishment.Dominance increased with reduced forest area,in high productive soils and at higher altitudes.Moreover,dominance increased near urban areas,roads,and railways,as well as in highly aforested landscapes,and in loamy and low-rockiness soils.Conclusions The invasion of Uruguayan forests by L.lucidum is in the spread and impact stages,currently in expansion from the invasion focus on the S-SW region,where the oldest urbanizations are settled,towards the rest of the country.The geographic proximity to the invasion focus is currently the main predictor of both L.lucidum establishment and dominance.Additionally,whereas establishment is manly facilitated by human infrastructures improving propagule pressure and dispersion,dominance is enhanced in small or fragmented forest patches,in richnutrient soils,and at higher altitudes,suggesting ecosystem resistance is also operating.
