Water is the key factor limiting dryland wheat grain yield.Mulching affects crop yield and yield components by affecting soil moisture.Further research is needed to determine the relationships between yield components...Water is the key factor limiting dryland wheat grain yield.Mulching affects crop yield and yield components by affecting soil moisture.Further research is needed to determine the relationships between yield components and soil moisture with yield,and to identify the most important factor affecting grain yield under various mulching measures.A long-term 9-yearifeld experiment in the Loess Plateau of Northwest China was carried out with three treatments:no mulch (CK),plastic mulch (M_(P)) and straw mulch (M_(S)).Yield factors and soil moisture were measured,and the relationships between them were explored by correlation analysis,structural equation modeling and significance analysis.The results showed that compared with CK,the average grain yields of M_(P) and M_(S) increased by 13.0and 10.6%,respectively.The average annual grain yield of the M_(P) treatment was 134 kg ha^(–1) higher than the M_(S) treatment.There were no significant differences in yield components among the three treatments (P<0.05).Soil water storage of the M_(S) treatment was greater than the M_(P) treatment,although the differences were not statistically signifiant.Soil water storage during the summer fallow period (SWSSF) and soil water storage before sowing (SWSS) of M_(S) were significantly higher than in CK,which increased by 38.5 and 13.6%,respectively.The relationship between M_(P) and CK was not statistically significant for SWSSF,but the SWSS in M_(P) was significantly higher than in CK.In terms of soil water storage after harvest (SWSH) and water consumption in the growth period(ET),there were no signi?cant differences among the three treatments.Based on the three analysis methods,we found that spike number and ET were positively correlated with grain yield.However,the relative importance of spike number to yield was the greatest in the M_(P )and M_(S) treatments,while that of ET was the greatest in CK.Suifcient SWSSF could indirectly increase spike number and ET in the three treatments.Based on these results,mulch can improve yield and soil water storage.The most important factor affecting the grain yield of dryland wheat was spike number under mulching,and ET with CK.These findings may help us to understand the main factors influencing dryland wheat grain yield under mulching conditions compared to CK.展开更多
Accurate estimation of crop evapotranspiration(ETc) and soil water balance, which is vital for optimizing water management strategy in crop production, can be performed by simulation. But existing software has many de...Accurate estimation of crop evapotranspiration(ETc) and soil water balance, which is vital for optimizing water management strategy in crop production, can be performed by simulation. But existing software has many deficiencies, including complex operation, limited scalability, lack of batch processing, and a single ETc model. Here we present simET, an open-source software package written in the R programming language. Many concepts involved in crop ETc simulation are condensed into functions in the package. It includes three widely used crop ETc models built on these functions: the single-crop coefficient,double-crop coefficient, and Shuttleworth–Wallace models, along with tools for preparing model data and comparing estimates. SimET supports ETc simulation in crops with repeated growth cycles such as alfalfa, a perennial forage crop that is cut multiple times annually.展开更多
As the amount of data produced by ground penetrating radar(GPR) for roots is large, the transmission and the storage of data consumes great resources. To alleviate this problem, we propose here a root imaging algorith...As the amount of data produced by ground penetrating radar(GPR) for roots is large, the transmission and the storage of data consumes great resources. To alleviate this problem, we propose here a root imaging algorithm using chaotic particle swarm optimal(CPSO)compressed sensing based on GPR data according to the sparsity of root space. Radar data are decomposed,observed, measured and represented in sparse manner, so roots image can be reconstructed with limited data. Firstly,radar signal measurement and sparse representation are implemented, and the solution space is established by wavelet basis and Gauss random matrix; secondly, the matching function is considered as the fitness function, and the best fitness value is found by a PSO algorithm; then, a chaotic search was used to obtain the global optimal operator; finally, the root image is reconstructed by the optimal operators. A-scan data, B-scan data, and complex data from American GSSI GPR is used, respectively, in the experimental test. For B-scan data, the computation time was reduced 60 % and PSNR was improved 5.539 dB; foractual root data imaging, the reconstruction PSNR was26.300 dB, and total computation time was only 67.210 s.The CPSO-OMP algorithm overcomes the problem of local optimum trapping and comprehensively enhances the precision during reconstruction.展开更多
We determined the ultrasonic velocity and energy attenuation value of three tree species(basswood, elm,and fir) 1 per tree in different moisture content levels, using RSM-SY5 ultrasonic testing instrument, and analyze...We determined the ultrasonic velocity and energy attenuation value of three tree species(basswood, elm,and fir) 1 per tree in different moisture content levels, using RSM-SY5 ultrasonic testing instrument, and analyzed the regularity of ultrasonic velocity and energy attenuation values with moisture content, respectively. The ultrasonic velocity of the three species decreased as moisture content increased, with the turning point at 32 % of moisture content. When the moisture content was more than 32 %,the growth curve of ultrasonic wave velocity was flattened.The moisture contents of all three species increased under the any point moisture content of 1–60 %. The differentiation degrees of energy attenuation value of three species were higher than the corresponding ultrasonic wave velocity, when the moisture content was less than 15 %. The differentiation degrees of the energy attenuation value of three species was higher than the corresponding ultrasonic velocity, when the moisture content was more than 15 %.展开更多
Union resolution performance of FM (frequency modulation) parameter based on Radon-Wigner transform (RWT) for multi-component LFM (linear frequency modulation) signals is studied. Firstly, the RWT output expression is...Union resolution performance of FM (frequency modulation) parameter based on Radon-Wigner transform (RWT) for multi-component LFM (linear frequency modulation) signals is studied. Firstly, the RWT output expression is offered, and the independent resolution performances of initial frequency and chirp rate are analyzed. Secondly, the RWT output approximate analytic expression is given based on quadratic Taylor's series expansion, and the contour property is analyzed. Contour can be used to picture the union resolution performance of FM parameter, and 2-D resolution performance is studied based on approximate analytic expression, and the union resolution expression of FM parameter and resolution ellipse are offered. The simulation results validate the union resolution expression, and show that the union resolution can improve the resolution performance of multi-component LFM signals, contrasted with absolute resolution performance. The paper can help the study of LFM parameter estimation and resolution performance.展开更多
Introduction:Analyze the recent epidemiological and temporal-spatial characteristics of human brucellosis in China and provide information for adjusting strategies for brucellosis control.Methods:Human brucellosis dat...Introduction:Analyze the recent epidemiological and temporal-spatial characteristics of human brucellosis in China and provide information for adjusting strategies for brucellosis control.Methods:Human brucellosis data were obtained from the National Notifiable Disease Reporting System(NNDRS).A geographical information system(GIS)was used to visualize high-risk areas with annual incidence based on county(district)polygons.The space-time scan statistic(STSS)was applied to detect the space-time clusters of human brucellosis.Results:A total of 69,767 cases were reported from 2,083 counties in the mainland of China in 2021,a 47.7%increase from 2020(47,425).About 95.5%of the total cases were centralized in northern China and 31.8%in Inner Mongolia(IM).The number of counties with an incidence exceeding 100 per 100,000 was 34 in 2020 and 65 in 2021.From 2020 to 2021,24 space-time clusters were detected.The two primary clusters were located northeast of IM,including 109 counties.The secondary clusters affected 208 counties in 2020 and spread to 297 counties in 2021,the majority of which were located in the middle of IM,exhibiting a trend spreading west from IM to neighboring provincial-level administrative divisions(PLADs).Conclusions:From 2020 to 2021,the incidence of human brucellosis nationwide was exponential,demonstrating distinct spatiotemporal characteristics.Space-time clusters were located in IM and neighboring areas.Therefore,considerable efforts are required to curb this momentum.展开更多
Corrosion resistance of titanium(Ti)alloys is closely connected with their microstructure which can be adjusted and controlled via different annealing schemes.Herein,we systematically investigate the specific effects ...Corrosion resistance of titanium(Ti)alloys is closely connected with their microstructure which can be adjusted and controlled via different annealing schemes.Herein,we systematically investigate the specific effects of annealing on the corrosion performance of Ti-6 Al-3 Nb-2 Zr-1 Mo(Ti80)alloy in 3.5 wt.%NaCl and 5 M HCl solutions,respectively,based on open circuit potential(OCP),potentiodynamic polarization,electrochemical impedance spectroscopy(EIS),static immersion tests and surface analysis.Results indicate that increasing annealing tempe rature endows Ti80 alloy with a higher volume fraction ofβphase and finerαphase,which in turn improves its corrosion resistance.Surface characterization demonstrates thatβphase is more resistant to corrosion thanαphase owing to a higher content of Nb,Mo,and Zr in the former;additionally,the decreased thickness of a phase alleviates segregation of elements to further restrain the micro-galvanic couple effects betweenαandβphases.Meanwhile,the influential mechanisms of environmental conditions on corrosion of Ti80 alloy are discussed in detail.As the formation of a highly compact and stable oxide film on surface,annealed Ti80 alloys exhibit a low corrosion current density(10^(-6)A/cm^(2))and high polarization impedance(10^(6)Ω·cm^(2))in 3.5 wt.%NaCl solution.However,they suffer severe corrosion in 5 M HCl solution,resulting from the breakdown of native oxide films(the conversion of TiO_(2)to aqueous Ti^(3+)),active dissolution of substrate Ti to aqueous Ti^(3+)and existence of micro-galvanic couple effects.Those findings could provide new insights to designing Ti alloys with high-corrosion resistance through microstructural optimization.展开更多
Introduction:Brucellosis is an important zoonotic infectious disease with its main mode of transmission from livestock to humans.The study analyzed epidemiological characteristics of human brucellosis from 2016 to 201...Introduction:Brucellosis is an important zoonotic infectious disease with its main mode of transmission from livestock to humans.The study analyzed epidemiological characteristics of human brucellosis from 2016 to 2019 in China,aiming to understand progress of the National Program of Brucellosis Prevention and Control.Methods:The research obtained data on human brucellosis cases reported through China’s National Notifiable Disease Reporting System(NNDRS)from January 1,2016 to December 31,2019 and described brucellosis epidemiological patterns by region,seasonality,age,sex,and occupation.Results:The number of cases reported nationwide in China decreased from 47,139(3.4/100,000)in 2016 to 37,947(2.7/100,000)in 2018,and then increased to 44,036(3.2/100,000)in 2019,with an average annual incidence of 3.0/100,000 during the four study years.Brucellosis in Xinjiang declined from 35.6/100,000 in 2016 to 16.3/100,000 in 2019-an average annual decrease of 22.9%.Brucellosis in Inner Mongolia increased from 23.8/100,000 in 2016 to 54.4/100,000 in 2019-an average increase of 31.8%per year and accounting for 22%of all reported cases.Northern China reported 95.2%of cases during this period and still had an incidence of 7.2/100,000 and 87.0%of counties being affected by brucellosis in 2019.In this region in 2019,males aged 45-64 years old had an incidence of over 15.9/100,000,compared with over 7.0/100,000 among females aged 45-64 years old.Conclusions:Although there was progress in prevention and control of human brucellosis in some provincial-level administrative divisions(PLADs)in 2016 through 2019,progress was limited nationwide and there was an overall resurgence of brucellosis in 2019.The resurgence was primarily in Inner Mongolia.An One Health approach should be strengthened to ensure successful and sustainable brucellosis prevention and control in China.展开更多
Head and neck squamous cell carcinoma(HNSCC),as the most common type(>90%)of head and neck cancer,includes various epithelial malignancies that arise in the nasal cavity,oral cavity,pharynx,and larynx.In 2020,appro...Head and neck squamous cell carcinoma(HNSCC),as the most common type(>90%)of head and neck cancer,includes various epithelial malignancies that arise in the nasal cavity,oral cavity,pharynx,and larynx.In 2020,approximately 878000 new cases and 444000 deaths linked to HNSCC occurred worldwide(Sung et al.,2021).Due to the associated frequent recurrence and metastasis.展开更多
Background and Aims:Chronic kidney disease(CKD)usually occurs during the chronic infection of hepatitis B virus(HBV).However,the risk factors of CKD in an HBV population have not been completely demonstrated.Our prese...Background and Aims:Chronic kidney disease(CKD)usually occurs during the chronic infection of hepatitis B virus(HBV).However,the risk factors of CKD in an HBV population have not been completely demonstrated.Our present study aimed to investigate the risk factors of CKD in chronic HBV infection using a hospital based cross-sectional study in the northern area of China.Methods:During January 2013 to December 2017,a total of 94 patients with CKD complicated by chronic HBV infection were consecutively enrolled in the study,as well as 548 age-and sex-matched hepatitis B patients without CKD who were enrolled as controls.Univariate and multivariate regression analyses were used to determine the effects of each variable after adjusting for cofounding factors.Results:Multivariate analysis showed that HBeAg-positive status(odds ratio[OR]=2.099,95%CI 1.128-3.907),dyslipidemia(OR:3.025,95%CI 1.747-5.239),and hypertension(OR:12.523,95%CI 6.283-24.958)were independently associ-ated with the incidence of CKD,while duration of HBV in-fection(≥240 months)(OR:0.401,95%CI 0.179-0.894),Log10 HBsAg(OR:0.514,95%CI 0.336-0.786),and coro-nary heart disease(OR:0.078,95%CI 0.008-0.768)were protective factors for the incidence of CKD.Duration of HBV infection,Log10 HBsAg,HBeAg-positive status and dyslipidemia remained the risk factors for CKD after adjusting for diabetes mellitus,hypertension,and coronary heart disease.Conclusions:Duration of HBV infection,Log10 HB-sAg,HBeAg-positive status and dyslipidemia contributed to the incidence of CKD during chronic HBV infection in a Chinese population.展开更多
基金supported financially by the National Key Research and Development Program of China(2021YFD1900703)the National Natural Science Foundation of China(31272250)。
文摘Water is the key factor limiting dryland wheat grain yield.Mulching affects crop yield and yield components by affecting soil moisture.Further research is needed to determine the relationships between yield components and soil moisture with yield,and to identify the most important factor affecting grain yield under various mulching measures.A long-term 9-yearifeld experiment in the Loess Plateau of Northwest China was carried out with three treatments:no mulch (CK),plastic mulch (M_(P)) and straw mulch (M_(S)).Yield factors and soil moisture were measured,and the relationships between them were explored by correlation analysis,structural equation modeling and significance analysis.The results showed that compared with CK,the average grain yields of M_(P) and M_(S) increased by 13.0and 10.6%,respectively.The average annual grain yield of the M_(P) treatment was 134 kg ha^(–1) higher than the M_(S) treatment.There were no significant differences in yield components among the three treatments (P<0.05).Soil water storage of the M_(S) treatment was greater than the M_(P) treatment,although the differences were not statistically signifiant.Soil water storage during the summer fallow period (SWSSF) and soil water storage before sowing (SWSS) of M_(S) were significantly higher than in CK,which increased by 38.5 and 13.6%,respectively.The relationship between M_(P) and CK was not statistically significant for SWSSF,but the SWSS in M_(P) was significantly higher than in CK.In terms of soil water storage after harvest (SWSH) and water consumption in the growth period(ET),there were no signi?cant differences among the three treatments.Based on the three analysis methods,we found that spike number and ET were positively correlated with grain yield.However,the relative importance of spike number to yield was the greatest in the M_(P )and M_(S) treatments,while that of ET was the greatest in CK.Suifcient SWSSF could indirectly increase spike number and ET in the three treatments.Based on these results,mulch can improve yield and soil water storage.The most important factor affecting the grain yield of dryland wheat was spike number under mulching,and ET with CK.These findings may help us to understand the main factors influencing dryland wheat grain yield under mulching conditions compared to CK.
基金jointly supported by the National Natural Science Foundation of China (32171679 and 32201475)。
文摘Accurate estimation of crop evapotranspiration(ETc) and soil water balance, which is vital for optimizing water management strategy in crop production, can be performed by simulation. But existing software has many deficiencies, including complex operation, limited scalability, lack of batch processing, and a single ETc model. Here we present simET, an open-source software package written in the R programming language. Many concepts involved in crop ETc simulation are condensed into functions in the package. It includes three widely used crop ETc models built on these functions: the single-crop coefficient,double-crop coefficient, and Shuttleworth–Wallace models, along with tools for preparing model data and comparing estimates. SimET supports ETc simulation in crops with repeated growth cycles such as alfalfa, a perennial forage crop that is cut multiple times annually.
基金supported by the National Natural Science Foundation of China(21373185,41672033,21506188,21404090)the Open Project Programs of Engineering Research Center of Non-metallic Minerals of Zhejiang Province(ZD2015k07)+2 种基金of State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology(GCTKF2014006)of Key Laboratory of High Efficient Processing of Bamboo of Zhejiang Province(2016)of State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology(CRE-2016-C-303)~~
基金supported by the National Natural Science Foundation of China(21872160,21802094,21673269)the National Science Fund for Distinguished Young Scholars(21825204)+1 种基金the National Key R&D Program of China(2017YFA0700101)the Natural Science Basic Research Plan in Shaanxi Province of China(2018JQ2038)~~
基金supported by the Fundamental Research Funds for the Central Universities(DL13BB21)the Natural Science Foundation of Heilongjiang Province(C2015054)+1 种基金Heilongjiang Province Technology Foundation for Selected Osverseas ChineseNatural Science Foundation of Heilongjiang Province(F2015036)
文摘As the amount of data produced by ground penetrating radar(GPR) for roots is large, the transmission and the storage of data consumes great resources. To alleviate this problem, we propose here a root imaging algorithm using chaotic particle swarm optimal(CPSO)compressed sensing based on GPR data according to the sparsity of root space. Radar data are decomposed,observed, measured and represented in sparse manner, so roots image can be reconstructed with limited data. Firstly,radar signal measurement and sparse representation are implemented, and the solution space is established by wavelet basis and Gauss random matrix; secondly, the matching function is considered as the fitness function, and the best fitness value is found by a PSO algorithm; then, a chaotic search was used to obtain the global optimal operator; finally, the root image is reconstructed by the optimal operators. A-scan data, B-scan data, and complex data from American GSSI GPR is used, respectively, in the experimental test. For B-scan data, the computation time was reduced 60 % and PSNR was improved 5.539 dB; foractual root data imaging, the reconstruction PSNR was26.300 dB, and total computation time was only 67.210 s.The CPSO-OMP algorithm overcomes the problem of local optimum trapping and comprehensively enhances the precision during reconstruction.
基金financially supported by‘‘The Fundamental Research Funds for the Central Universities’’,DL12BB12 and 2572014CB35
文摘We determined the ultrasonic velocity and energy attenuation value of three tree species(basswood, elm,and fir) 1 per tree in different moisture content levels, using RSM-SY5 ultrasonic testing instrument, and analyzed the regularity of ultrasonic velocity and energy attenuation values with moisture content, respectively. The ultrasonic velocity of the three species decreased as moisture content increased, with the turning point at 32 % of moisture content. When the moisture content was more than 32 %,the growth curve of ultrasonic wave velocity was flattened.The moisture contents of all three species increased under the any point moisture content of 1–60 %. The differentiation degrees of energy attenuation value of three species were higher than the corresponding ultrasonic wave velocity, when the moisture content was less than 15 %. The differentiation degrees of the energy attenuation value of three species was higher than the corresponding ultrasonic velocity, when the moisture content was more than 15 %.
文摘Union resolution performance of FM (frequency modulation) parameter based on Radon-Wigner transform (RWT) for multi-component LFM (linear frequency modulation) signals is studied. Firstly, the RWT output expression is offered, and the independent resolution performances of initial frequency and chirp rate are analyzed. Secondly, the RWT output approximate analytic expression is given based on quadratic Taylor's series expansion, and the contour property is analyzed. Contour can be used to picture the union resolution performance of FM parameter, and 2-D resolution performance is studied based on approximate analytic expression, and the union resolution expression of FM parameter and resolution ellipse are offered. The simulation results validate the union resolution expression, and show that the union resolution can improve the resolution performance of multi-component LFM signals, contrasted with absolute resolution performance. The paper can help the study of LFM parameter estimation and resolution performance.
基金Public Health Emergency Response Mechanism Operation Program of Chinese Center for Disease Control and Prevention(131031001000210001)National Science and Technology Major Project of China(2018ZX10101002-003-002).
文摘Introduction:Analyze the recent epidemiological and temporal-spatial characteristics of human brucellosis in China and provide information for adjusting strategies for brucellosis control.Methods:Human brucellosis data were obtained from the National Notifiable Disease Reporting System(NNDRS).A geographical information system(GIS)was used to visualize high-risk areas with annual incidence based on county(district)polygons.The space-time scan statistic(STSS)was applied to detect the space-time clusters of human brucellosis.Results:A total of 69,767 cases were reported from 2,083 counties in the mainland of China in 2021,a 47.7%increase from 2020(47,425).About 95.5%of the total cases were centralized in northern China and 31.8%in Inner Mongolia(IM).The number of counties with an incidence exceeding 100 per 100,000 was 34 in 2020 and 65 in 2021.From 2020 to 2021,24 space-time clusters were detected.The two primary clusters were located northeast of IM,including 109 counties.The secondary clusters affected 208 counties in 2020 and spread to 297 counties in 2021,the majority of which were located in the middle of IM,exhibiting a trend spreading west from IM to neighboring provincial-level administrative divisions(PLADs).Conclusions:From 2020 to 2021,the incidence of human brucellosis nationwide was exponential,demonstrating distinct spatiotemporal characteristics.Space-time clusters were located in IM and neighboring areas.Therefore,considerable efforts are required to curb this momentum.
基金supported by the National Key Research and Development Program of China(2016YFB0301201)the Yunnan Rare Metal Materials Genetic Engineering Project(2018ZE013)the National Natural Science Foundation of China(51425402 and 51671073)。
文摘Corrosion resistance of titanium(Ti)alloys is closely connected with their microstructure which can be adjusted and controlled via different annealing schemes.Herein,we systematically investigate the specific effects of annealing on the corrosion performance of Ti-6 Al-3 Nb-2 Zr-1 Mo(Ti80)alloy in 3.5 wt.%NaCl and 5 M HCl solutions,respectively,based on open circuit potential(OCP),potentiodynamic polarization,electrochemical impedance spectroscopy(EIS),static immersion tests and surface analysis.Results indicate that increasing annealing tempe rature endows Ti80 alloy with a higher volume fraction ofβphase and finerαphase,which in turn improves its corrosion resistance.Surface characterization demonstrates thatβphase is more resistant to corrosion thanαphase owing to a higher content of Nb,Mo,and Zr in the former;additionally,the decreased thickness of a phase alleviates segregation of elements to further restrain the micro-galvanic couple effects betweenαandβphases.Meanwhile,the influential mechanisms of environmental conditions on corrosion of Ti80 alloy are discussed in detail.As the formation of a highly compact and stable oxide film on surface,annealed Ti80 alloys exhibit a low corrosion current density(10^(-6)A/cm^(2))and high polarization impedance(10^(6)Ω·cm^(2))in 3.5 wt.%NaCl solution.However,they suffer severe corrosion in 5 M HCl solution,resulting from the breakdown of native oxide films(the conversion of TiO_(2)to aqueous Ti^(3+)),active dissolution of substrate Ti to aqueous Ti^(3+)and existence of micro-galvanic couple effects.Those findings could provide new insights to designing Ti alloys with high-corrosion resistance through microstructural optimization.
基金This work was supported by National Science and Technology Major Project of China(2018ZX10101002-003-002).
文摘Introduction:Brucellosis is an important zoonotic infectious disease with its main mode of transmission from livestock to humans.The study analyzed epidemiological characteristics of human brucellosis from 2016 to 2019 in China,aiming to understand progress of the National Program of Brucellosis Prevention and Control.Methods:The research obtained data on human brucellosis cases reported through China’s National Notifiable Disease Reporting System(NNDRS)from January 1,2016 to December 31,2019 and described brucellosis epidemiological patterns by region,seasonality,age,sex,and occupation.Results:The number of cases reported nationwide in China decreased from 47,139(3.4/100,000)in 2016 to 37,947(2.7/100,000)in 2018,and then increased to 44,036(3.2/100,000)in 2019,with an average annual incidence of 3.0/100,000 during the four study years.Brucellosis in Xinjiang declined from 35.6/100,000 in 2016 to 16.3/100,000 in 2019-an average annual decrease of 22.9%.Brucellosis in Inner Mongolia increased from 23.8/100,000 in 2016 to 54.4/100,000 in 2019-an average increase of 31.8%per year and accounting for 22%of all reported cases.Northern China reported 95.2%of cases during this period and still had an incidence of 7.2/100,000 and 87.0%of counties being affected by brucellosis in 2019.In this region in 2019,males aged 45-64 years old had an incidence of over 15.9/100,000,compared with over 7.0/100,000 among females aged 45-64 years old.Conclusions:Although there was progress in prevention and control of human brucellosis in some provincial-level administrative divisions(PLADs)in 2016 through 2019,progress was limited nationwide and there was an overall resurgence of brucellosis in 2019.The resurgence was primarily in Inner Mongolia.An One Health approach should be strengthened to ensure successful and sustainable brucellosis prevention and control in China.
基金This work was supported by the National Natural Science Foundation of China(No.U2004136)the Supporting Program for Central Plain Young Top Talents(No.ZYQR201912176),the Program for Innovative Talents of Science and Technology in Henan Province(No.18HASTIT048)+2 种基金the Program for Science and Technology Development in Henan Province(Nos.212102310150,202102310063,and SBGJ2018041)the Kaifeng Science and Technology Project(No.1908001)the Supporting Grant of Henan University(Nos.2018YLJC01,2019YLXKJC01,and 2020YLZDYJ14),China.
文摘Head and neck squamous cell carcinoma(HNSCC),as the most common type(>90%)of head and neck cancer,includes various epithelial malignancies that arise in the nasal cavity,oral cavity,pharynx,and larynx.In 2020,approximately 878000 new cases and 444000 deaths linked to HNSCC occurred worldwide(Sung et al.,2021).Due to the associated frequent recurrence and metastasis.
基金supported by grants from the National Natural Science Foundation of China(Nos.82070746,81670660,81970522,82000692)the Department of Science&Technology of Shandong Province(No.2019GSF108087)the Young Taishan Scholars(tsqn202103169).
文摘Background and Aims:Chronic kidney disease(CKD)usually occurs during the chronic infection of hepatitis B virus(HBV).However,the risk factors of CKD in an HBV population have not been completely demonstrated.Our present study aimed to investigate the risk factors of CKD in chronic HBV infection using a hospital based cross-sectional study in the northern area of China.Methods:During January 2013 to December 2017,a total of 94 patients with CKD complicated by chronic HBV infection were consecutively enrolled in the study,as well as 548 age-and sex-matched hepatitis B patients without CKD who were enrolled as controls.Univariate and multivariate regression analyses were used to determine the effects of each variable after adjusting for cofounding factors.Results:Multivariate analysis showed that HBeAg-positive status(odds ratio[OR]=2.099,95%CI 1.128-3.907),dyslipidemia(OR:3.025,95%CI 1.747-5.239),and hypertension(OR:12.523,95%CI 6.283-24.958)were independently associ-ated with the incidence of CKD,while duration of HBV in-fection(≥240 months)(OR:0.401,95%CI 0.179-0.894),Log10 HBsAg(OR:0.514,95%CI 0.336-0.786),and coro-nary heart disease(OR:0.078,95%CI 0.008-0.768)were protective factors for the incidence of CKD.Duration of HBV infection,Log10 HBsAg,HBeAg-positive status and dyslipidemia remained the risk factors for CKD after adjusting for diabetes mellitus,hypertension,and coronary heart disease.Conclusions:Duration of HBV infection,Log10 HB-sAg,HBeAg-positive status and dyslipidemia contributed to the incidence of CKD during chronic HBV infection in a Chinese population.
