Document processing in natural language includes retrieval,sentiment analysis,theme extraction,etc.Classical methods for handling these tasks are based on models of probability,semantics and networks for machine learn...Document processing in natural language includes retrieval,sentiment analysis,theme extraction,etc.Classical methods for handling these tasks are based on models of probability,semantics and networks for machine learning.The probability model is loss of semantic information in essential,and it influences the processing accuracy.Machine learning approaches include supervised,unsupervised,and semi-supervised approaches,labeled corpora is necessary for semantics model and supervised learning.The method for achieving a reliably labeled corpus is done manually,it is costly and time-consuming because people have to read each document and annotate the label of each document.Recently,the continuous CBOW model is efficient for learning high-quality distributed vector representations,and it can capture a large number of precise syntactic and semantic word relationships,this model can be easily extended to learn paragraph vector,but it is not precise.Towards these problems,this paper is devoted to developing a new model for learning paragraph vector,we combine the CBOW model and CNNs to establish a new deep learning model.Experimental results show that paragraph vector generated by the new model is better than the paragraph vector generated by CBOW model in semantic relativeness and accuracy.展开更多
It is the key element in the integrated capillary electrophoresis chip separation to push a certain liquid sample into the separation channel.The electrokinetic injection system model was set up;the theory and the rul...It is the key element in the integrated capillary electrophoresis chip separation to push a certain liquid sample into the separation channel.The electrokinetic injection system model was set up;the theory and the rule of the liquid flow were studied.The numerical simulation describing the potential,velocity vector and the stream distribution in the micro channel is presented.According to these simulation results,the pushing sample injection experiments were designed and the experimental results agree well with the simulation results.展开更多
Finding the important nodes in complex networks by topological structure is of great significance to network invulnerability.Several centrality measures have been proposed recently to evaluate the performance of nodes...Finding the important nodes in complex networks by topological structure is of great significance to network invulnerability.Several centrality measures have been proposed recently to evaluate the performance of nodes based on their correlation,showing that the interaction between nodes has an influence on the importance of nodes.In this paper,a novel method based on node’s distribution and global influence in complex networks is proposed.The nodes in the complex networks are classified according to the distance matrix,then the correlation coefficient between pairs of nodes is calculated.From the whole perspective in the network,the global similarity centrality(GSC)is proposed based on the relevance and the shortest distance between any two nodes.The efficiency,accuracy,and monotonicity of the proposed method are analyzed in two artificial datasets and eight real datasets of different sizes.Experimental results show that the performance of GSC method outperforms those current state-of-the-art algorithms.展开更多
Introduction:The Chinese government has established targets for elimination of schistosomiasis in all endemic counties by 2028.This study aimed to analyze the epidemiological characteristics of schistosomiasis in Chin...Introduction:The Chinese government has established targets for elimination of schistosomiasis in all endemic counties by 2028.This study aimed to analyze the epidemiological characteristics of schistosomiasis in China after transmission control and provide a theoretical basis for achieving the countylevel elimination goal by 2028.Methods:Provincial and county-level data on human infection,cattle reservoirs and Oncomelania hupensis snail vector distribution were collected from 2016 to 2023,to analyze the trend of schistosomiasis epidemic situation and serological positive rate.Joinpoint regression analysis was employed to analyze seropositive rate trends.Results:The number of schistosomiasis cases decreased by 49.00%,from 54,454 in 2016 to 27,772 in 2023.The 8-year average seropositive rate across provincial-level administrative divisions(PLADs)was 1.80%,with the highest rates observed in Yunnan(2.99%),Jiangxi(2.84%),and Hunan(2.67%)PLADs.Joinpoint analysis revealed a consistent decline in seropositive rates since 2016 and a significant inflection point was identified in 2021,indicating an acceleration in the rate of decline.No positive cattle have been detected since 2020.The total area of snail habitats exhibited a slight rebound from 356,835 square hectometers(hm^(2))in 2016 to 367,702 hm^(2) in 2023,with new habitats emerging annually,totaling 4,080 hm^(2) of newly identified habitats.Conclusions:Development of highly sensitive and specific diagnostic tools is essential,alongside intensified surveillance of wild animal reservoirs and high-risk snail habitats,to achieve the goal of eliminating schistosomiasis by 2030.展开更多
In this study,we continue an investigation of the semileptonic decays B_(s)→D_(s)^(*)lve.First,we derive the moments of the D_(s)^(*)-meson longitudinal leading-twist light-cone distribution amplitude (LCDA) based on...In this study,we continue an investigation of the semileptonic decays B_(s)→D_(s)^(*)lve.First,we derive the moments of the D_(s)^(*)-meson longitudinal leading-twist light-cone distribution amplitude (LCDA) based on QCD sum rules within the background field theory framework.Considering the contributions of the vacuum condensates up to dimension-six,its first ten non-zero ξ-moments at the initial scale μ_(0)=1.3GeV are <ξ_(2;D_(s)^(*))^(‖,1)>}μ_(0)=-0.302_(-0.046)^(+0.038),<ξ_(2;D_(s)^(*))^(‖,2)>}μ_(0)=+0.229_(-0.034)^(+0.039),<ξ_(2;D_(s)^(*))^(‖,3)>}μ_(0)=-0.121_(-0.019)^(+0.015),<ξ_(2;D_(s)^(*))^(‖,4)>}μ_(0)=+0.101_(-0.014)^(+0.017),<ξ_(2;D_(s)^(*))^(‖,5)>}μ_(0)=-0.066_(-0.010)^(+0.009),<ξ_(2;D_(s)^(*))^(‖,6)>}μ_(0)=+0.053_(-0.007)^(+0.009),<ξ_(2;D_(s)^(*))^(‖,7)>}μ_(0)=-0.041_(-0.007)^(+0.006),<ξ_(2;D_(s)^(*))^(‖,8)>}μ_(0)=+0.037_(-0.005)^(+0.006),<ξ_(2;D_(s)^(*))^(‖,9)>}μ_(0)=-0.026_(-0.004)^(+0.003),and <ξ_(2;D_(s)^(*))^(‖,10)>}μ_(0)=+0.025_(-0.004)^(+0.004).We also construct the D_(s)^(*)-meson longitudinal leading-twist LCDA by using the light-cone harmonic oscillator model.Then,using the above moments,we fix the model parameters α_(2);D_(s)^(*) and B_(1)^(2;D_(s)^(*)) using the least squares method and apply them to calculate B_(s)→D_(s)^(*) transition form factors A_(1)(q^(2)),A_(2)(q^(2)) and V(q^(2)) that are derived using the QCD light-cone sum rules.In the large recoil region,we obtain A_(1)(0)=0.632_(-0.135)^(+0.228),A_(2)(0)=0.706_(-0.092)^(+0.109),,and V(0)=0.647_(-0.069)^(+0.076).These form factors are then extrapolated to the allowed whole physical q^(2)-region through the simplified series expansion.Finally,we obtain the branching fractions for the two decay channels of B_(s)→D_(s)^(*)lve,B(B_(s)^(0)→D_(s)^(*)e^(-)v_(e))=(5.45_(-1.57)^(+2.15))×10^(-2) and B(B_(s)^(0)→D_(s)^(*)μ^(-)v_(μ))=(5.43_(-1.57)^(+2.14))×10^(-2).In addition,we present the CKM matrix element |V_(cb)| by matching the LHCb Collaboration branching fraction,yielding a value of |V_(cb)|=(40.11+_(7.49)^(+6.54))×10^(-3).展开更多
A vehicle-mounted three-dimensional underwater particle image velocimetry（PIV） device is used in a towing tank to measure the velocity distribution of the inlet duct of a waterjet ship model in a self-propulsion tes...A vehicle-mounted three-dimensional underwater particle image velocimetry（PIV） device is used in a towing tank to measure the velocity distribution of the inlet duct of a waterjet ship model in a self-propulsion test. The following points are shown through a comparison of the influences of the stationary and free states of the ship model on the measured results：（1） during the test, the ship attitude will change, specifically, the ship model will heave and trim,（2） the degree of freedom disturbs the processing of the pixel images enough to distort the subsequent image processing,（3） the stationary state of the ship model is the optimal mode for measuring the velocity distribution using the PIV device, and（4） if the changes must be considered, the man-made heaving and trimming may be pre-applied, and be made a corrected stationary mode. In addition, the momentum effect coefficient and the energy effect coefficient are calculated in a non-uniform inflowing state, and the related factors affecting the two coefficients are analyzed. The test results show that the pumping action of the waterjet creates a transverse vector in the cross-sectional speed, which increases the non-uniformity of the inflow. These results could help to establish the design requirements for a waterjet-propelled ship type.展开更多
This paper studies evaluation system of restricting factors in training students’ qualities by modern mathematical method of analysis hierarchy process and principal factor analysis, and to build up a mathematical mo...This paper studies evaluation system of restricting factors in training students’ qualities by modern mathematical method of analysis hierarchy process and principal factor analysis, and to build up a mathematical model of evaluation system.展开更多
基金The authors would like to thank all anonymous reviewers for their suggestions and feedback.This work Supported by the National Natural Science,Foundation of China(No.61379052,61379103)the National Key Research and Development Program(2016YFB1000101)+1 种基金The Natural Science Foundation for Distinguished Young Scholars of Hunan Province(Grant No.14JJ1026)Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20124307110015).
文摘Document processing in natural language includes retrieval,sentiment analysis,theme extraction,etc.Classical methods for handling these tasks are based on models of probability,semantics and networks for machine learning.The probability model is loss of semantic information in essential,and it influences the processing accuracy.Machine learning approaches include supervised,unsupervised,and semi-supervised approaches,labeled corpora is necessary for semantics model and supervised learning.The method for achieving a reliably labeled corpus is done manually,it is costly and time-consuming because people have to read each document and annotate the label of each document.Recently,the continuous CBOW model is efficient for learning high-quality distributed vector representations,and it can capture a large number of precise syntactic and semantic word relationships,this model can be easily extended to learn paragraph vector,but it is not precise.Towards these problems,this paper is devoted to developing a new model for learning paragraph vector,we combine the CBOW model and CNNs to establish a new deep learning model.Experimental results show that paragraph vector generated by the new model is better than the paragraph vector generated by CBOW model in semantic relativeness and accuracy.
文摘It is the key element in the integrated capillary electrophoresis chip separation to push a certain liquid sample into the separation channel.The electrokinetic injection system model was set up;the theory and the rule of the liquid flow were studied.The numerical simulation describing the potential,velocity vector and the stream distribution in the micro channel is presented.According to these simulation results,the pushing sample injection experiments were designed and the experimental results agree well with the simulation results.
基金the National Natural Science Foundation of China(Nos.11361033,62162040 and 11861045)。
文摘Finding the important nodes in complex networks by topological structure is of great significance to network invulnerability.Several centrality measures have been proposed recently to evaluate the performance of nodes based on their correlation,showing that the interaction between nodes has an influence on the importance of nodes.In this paper,a novel method based on node’s distribution and global influence in complex networks is proposed.The nodes in the complex networks are classified according to the distance matrix,then the correlation coefficient between pairs of nodes is calculated.From the whole perspective in the network,the global similarity centrality(GSC)is proposed based on the relevance and the shortest distance between any two nodes.The efficiency,accuracy,and monotonicity of the proposed method are analyzed in two artificial datasets and eight real datasets of different sizes.Experimental results show that the performance of GSC method outperforms those current state-of-the-art algorithms.
基金Supported by the Three-Year Initiative Plan for Strengthening Public Health System Construction in Shanghai(2023-2025)Key Discipline Project(GWVI-11.1-12).
文摘Introduction:The Chinese government has established targets for elimination of schistosomiasis in all endemic counties by 2028.This study aimed to analyze the epidemiological characteristics of schistosomiasis in China after transmission control and provide a theoretical basis for achieving the countylevel elimination goal by 2028.Methods:Provincial and county-level data on human infection,cattle reservoirs and Oncomelania hupensis snail vector distribution were collected from 2016 to 2023,to analyze the trend of schistosomiasis epidemic situation and serological positive rate.Joinpoint regression analysis was employed to analyze seropositive rate trends.Results:The number of schistosomiasis cases decreased by 49.00%,from 54,454 in 2016 to 27,772 in 2023.The 8-year average seropositive rate across provincial-level administrative divisions(PLADs)was 1.80%,with the highest rates observed in Yunnan(2.99%),Jiangxi(2.84%),and Hunan(2.67%)PLADs.Joinpoint analysis revealed a consistent decline in seropositive rates since 2016 and a significant inflection point was identified in 2021,indicating an acceleration in the rate of decline.No positive cattle have been detected since 2020.The total area of snail habitats exhibited a slight rebound from 356,835 square hectometers(hm^(2))in 2016 to 367,702 hm^(2) in 2023,with new habitats emerging annually,totaling 4,080 hm^(2) of newly identified habitats.Conclusions:Development of highly sensitive and specific diagnostic tools is essential,alongside intensified surveillance of wild animal reservoirs and high-risk snail habitats,to achieve the goal of eliminating schistosomiasis by 2030.
基金Supported in part by the National Natural Science Foundation of China(12265009,12265010)the Project of Guizhou Provincial Department of Science and Technology(MS[2025]219,CXTD[2025]030,ZK[2023]024)。
文摘In this study,we continue an investigation of the semileptonic decays B_(s)→D_(s)^(*)lve.First,we derive the moments of the D_(s)^(*)-meson longitudinal leading-twist light-cone distribution amplitude (LCDA) based on QCD sum rules within the background field theory framework.Considering the contributions of the vacuum condensates up to dimension-six,its first ten non-zero ξ-moments at the initial scale μ_(0)=1.3GeV are <ξ_(2;D_(s)^(*))^(‖,1)>}μ_(0)=-0.302_(-0.046)^(+0.038),<ξ_(2;D_(s)^(*))^(‖,2)>}μ_(0)=+0.229_(-0.034)^(+0.039),<ξ_(2;D_(s)^(*))^(‖,3)>}μ_(0)=-0.121_(-0.019)^(+0.015),<ξ_(2;D_(s)^(*))^(‖,4)>}μ_(0)=+0.101_(-0.014)^(+0.017),<ξ_(2;D_(s)^(*))^(‖,5)>}μ_(0)=-0.066_(-0.010)^(+0.009),<ξ_(2;D_(s)^(*))^(‖,6)>}μ_(0)=+0.053_(-0.007)^(+0.009),<ξ_(2;D_(s)^(*))^(‖,7)>}μ_(0)=-0.041_(-0.007)^(+0.006),<ξ_(2;D_(s)^(*))^(‖,8)>}μ_(0)=+0.037_(-0.005)^(+0.006),<ξ_(2;D_(s)^(*))^(‖,9)>}μ_(0)=-0.026_(-0.004)^(+0.003),and <ξ_(2;D_(s)^(*))^(‖,10)>}μ_(0)=+0.025_(-0.004)^(+0.004).We also construct the D_(s)^(*)-meson longitudinal leading-twist LCDA by using the light-cone harmonic oscillator model.Then,using the above moments,we fix the model parameters α_(2);D_(s)^(*) and B_(1)^(2;D_(s)^(*)) using the least squares method and apply them to calculate B_(s)→D_(s)^(*) transition form factors A_(1)(q^(2)),A_(2)(q^(2)) and V(q^(2)) that are derived using the QCD light-cone sum rules.In the large recoil region,we obtain A_(1)(0)=0.632_(-0.135)^(+0.228),A_(2)(0)=0.706_(-0.092)^(+0.109),,and V(0)=0.647_(-0.069)^(+0.076).These form factors are then extrapolated to the allowed whole physical q^(2)-region through the simplified series expansion.Finally,we obtain the branching fractions for the two decay channels of B_(s)→D_(s)^(*)lve,B(B_(s)^(0)→D_(s)^(*)e^(-)v_(e))=(5.45_(-1.57)^(+2.15))×10^(-2) and B(B_(s)^(0)→D_(s)^(*)μ^(-)v_(μ))=(5.43_(-1.57)^(+2.14))×10^(-2).In addition,we present the CKM matrix element |V_(cb)| by matching the LHCb Collaboration branching fraction,yielding a value of |V_(cb)|=(40.11+_(7.49)^(+6.54))×10^(-3).
基金Project supported by the National Natural Science Foundation of China(Grant Nos.51379043,51209048 and 51409063)
文摘A vehicle-mounted three-dimensional underwater particle image velocimetry（PIV） device is used in a towing tank to measure the velocity distribution of the inlet duct of a waterjet ship model in a self-propulsion test. The following points are shown through a comparison of the influences of the stationary and free states of the ship model on the measured results：（1） during the test, the ship attitude will change, specifically, the ship model will heave and trim,（2） the degree of freedom disturbs the processing of the pixel images enough to distort the subsequent image processing,（3） the stationary state of the ship model is the optimal mode for measuring the velocity distribution using the PIV device, and（4） if the changes must be considered, the man-made heaving and trimming may be pre-applied, and be made a corrected stationary mode. In addition, the momentum effect coefficient and the energy effect coefficient are calculated in a non-uniform inflowing state, and the related factors affecting the two coefficients are analyzed. The test results show that the pumping action of the waterjet creates a transverse vector in the cross-sectional speed, which increases the non-uniformity of the inflow. These results could help to establish the design requirements for a waterjet-propelled ship type.
文摘This paper studies evaluation system of restricting factors in training students’ qualities by modern mathematical method of analysis hierarchy process and principal factor analysis, and to build up a mathematical model of evaluation system.
