The net primary productivity of vegetation(NPP)is an important index to evaluate the carbon sequestration capacity of vegetation and land use change.Using MOD17N3HGF NPP data,climate data and night-time light data fro...The net primary productivity of vegetation(NPP)is an important index to evaluate the carbon sequestration capacity of vegetation and land use change.Using MOD17N3HGF NPP data,climate data and night-time light data from 2000 to 2020,this study explored the relationship between NPP and urban expansion,land use and climate change in the Southern Part of Taihang Mountain through brightness gradient method,trend analysis,partial correlation analysis and contribution analysis.It aims to provide information support for urban and rural planning and ecological management in this region.Key findings include:Over the past 20 years,NPP in mountain areas has shown an overall fluctuating upward trend,with an“N”pattern related to altitude.The human activity area expanded by 9.9%,with expansion of highly active areas holding back NPP growth and moderately active areas contributing to it.The trend of climate change is gradually warming and wetting,and the correlation between precipitation and NPP is strong,while the correlation between temperature and NPP is weak.Compared with human activities(19.9%),precipitation was the main driver of NPP change,contributing significantly up to 79.5%.In the past 20 years,the ecological quality of the south Taihang Mountain region has improved significantly and actively responded to climate change,but human activities have led to spatial and temporal ecological differences.展开更多
Aimed at the problem of final translation of space rendezvous for the applications such as docking,inspection and tracking,optimal straight-line guidance algorithm based on pulse/continuous low-thrust in the context o...Aimed at the problem of final translation of space rendezvous for the applications such as docking,inspection and tracking,optimal straight-line guidance algorithm based on pulse/continuous low-thrust in the context of Clohessy-Wiltshire dynamics is proposed.Two modes of guidance strategy:varying-speed and fixed-speed approaching scheme for V-bar and R-bar approach by using constant/finite low-thrust propulsion respectively are studied,and the corresponding fuel-optimal conditions are obtained.Numerical simulation is conducted to verify and test the proposed algorithms.The results show that there is generally no different between the fuel consumptions by using the two different approaching modes for V-bar case.However,the conclusion for Rbar case is different that the using of continuous low-thrust cost more fuel and transfer time.展开更多
As to solve the collaborative relative navigation problem for near-circular orbiting small satellites in close-range under GNSS denied environment,a novel consensus constrained relative navigation algorithm based on t...As to solve the collaborative relative navigation problem for near-circular orbiting small satellites in close-range under GNSS denied environment,a novel consensus constrained relative navigation algorithm based on the lever arm effect of the sensor offset from the spacecraft center of mass is proposed.Firstly,the orbital propagation model for the relative motion of multi-spacecraft is established based on Hill-Clohessy-Wiltshire dynamics and the line-of-sight measurement under sensor offset condition is modeled in Local Vertical Local Horizontal frame.Secondly,the consensus constraint model for the relative orbit state is constructed by introducing the geometry constraint between the spacecraft,based on which the consensus unscented Kalman filter is designed.Thirdly,the observability analysis is done and the necessary conditions of the sensor offset to make the state observable are obtained.Lastly,digital simulations are conducted to verify the proposed algorithm,where the comparison to the unconstrained case is also done.The results show that the estimated error of the relative position converges very quickly,the location error is smaller than 10m under the condition of 10−3 rad level camera and 5m offset.展开更多
Pomegranate has emerged as a viable option for the development of characteristic forest and fruit industries in various regions of China.Fermentation of pomegranate juice into wine not only enhances the economic value...Pomegranate has emerged as a viable option for the development of characteristic forest and fruit industries in various regions of China.Fermentation of pomegranate juice into wine not only enhances the economic value of the industry but also promotes the cultural significance.However,the biochemical changes that occur during fermentation and their effects on physiological functions remain unclear.In this study,we integrated non-targeted metabolomics,network pharmacology,and molecular docking technologies to investigate the metabolite changes and potential health benefits of fermented pomegranate juice.Our results indicate that quality control during fermentation can be optimized by targeting the alanine,aspartate,and glutamate metabolic pathways.A total of 62 differential metabolites were identified in non-fermented and fermented pomegranate juice.Among these,27 upregulated metabolites were analyzed using network pharmacology and molecular docking.The findings suggest that the biological targets of these metabolites may interfere with prostate cancer signaling pathways and nervous system disorders,highlighting the potential health benefits of fermented pomegranate juice.展开更多
This study investigated the fermentation mechanism,in vivo antioxidant mechanisms,and potential health effects of mulberry wine.By utilizing yeast to ferment mulberry juice,we revealed changes in antioxidant capacity ...This study investigated the fermentation mechanism,in vivo antioxidant mechanisms,and potential health effects of mulberry wine.By utilizing yeast to ferment mulberry juice,we revealed changes in antioxidant capacity and metabolite dynamics through non-targeted metabolomics.A total of 718 differential metabolites were identified,with 586 up-regulated and 132 down-regulated during fermentation.Enrichment analysis highlighted pathways such as flavone,flavonol,and isoflavonoid biosynthesis as essential to antioxidant quality control in mulberry wine production.Bioinformatics identified core antioxidant targets in vivo,including IGF1R,BCL2L1,MET,and KDR,which exert antioxidant effects via the PI3K-Akt signaling pathway.The reliability of this analysis was supported by molecular docking,suggesting that pinoquercetin may play a significant role in the antioxidant mechanisms of mulberry wine.Analyses of the KEGG and DO databases suggested that mulberry wine may help prevent bladder cancer and reproductive system tumors,providing valuable insights into its fermentation process and associated health benefits.展开更多
This study explores the fermentation mechanisms,antioxidant and anti-inflammatory properties,and health benefits of lactic acid bacteria-fermented grape juice using“Thompson Seedless”juice.Non-targeted metab-olomics...This study explores the fermentation mechanisms,antioxidant and anti-inflammatory properties,and health benefits of lactic acid bacteria-fermented grape juice using“Thompson Seedless”juice.Non-targeted metab-olomics and systems biology approaches were employed to investigate metabolite changes and associated bio-logical effects.Fermentation significantly increased total phenolic content and ABTS+radical scavenging capacity,altering the metabolic profile with 541 differential metabolites(254 upregulated,287 downregulated).Enrichment analysis highlighted carbohydrate and amino acid metabolism pathways contributing to flavor and health benefits.Systems biology revealed that key post-fermentation metabolites targeted Epidermal Growth Factor Receptor(EGFR),Proto-oncogene tyrosine-protein kinase(SRC),Kinase insert domain receptor(KDR),Tyrosine-protein kinase(SYK),Glycogen Synthase Kinase 3 Beta(GSK3B),and activated the Relaxin signaling pathway to exert antioxidant and anti-inflammatory effects.Molecular docking confirmed strong binding af-finities between these metabolites and targets.Additionally,enrichment analysis suggested potential bladder cancer preventive functions.This research establishes a theoretical framework for developing fermented Thompson Seedless grape products and guides future cellular/animal/human studies.展开更多
基金funded by NSFC Regional Innovation Development Joint Fund Key Project(U21A20108)General Project of Natural Science Foundation of Henan Province(242300421365)+3 种基金Support Plan for Technological Innovation Teams in Henan Province’s Higher Education Institutions(22IRTSTHN008)General Project for Humanities and Social Sciences in Higher Education Institutions of Henan Province(2024ZZJH147)Co-fundedResearch Program of“Double First-class”Creation Project of Surveying and Mapping Science and Technology Discipline(GCCYJ202401).
文摘The net primary productivity of vegetation(NPP)is an important index to evaluate the carbon sequestration capacity of vegetation and land use change.Using MOD17N3HGF NPP data,climate data and night-time light data from 2000 to 2020,this study explored the relationship between NPP and urban expansion,land use and climate change in the Southern Part of Taihang Mountain through brightness gradient method,trend analysis,partial correlation analysis and contribution analysis.It aims to provide information support for urban and rural planning and ecological management in this region.Key findings include:Over the past 20 years,NPP in mountain areas has shown an overall fluctuating upward trend,with an“N”pattern related to altitude.The human activity area expanded by 9.9%,with expansion of highly active areas holding back NPP growth and moderately active areas contributing to it.The trend of climate change is gradually warming and wetting,and the correlation between precipitation and NPP is strong,while the correlation between temperature and NPP is weak.Compared with human activities(19.9%),precipitation was the main driver of NPP change,contributing significantly up to 79.5%.In the past 20 years,the ecological quality of the south Taihang Mountain region has improved significantly and actively responded to climate change,but human activities have led to spatial and temporal ecological differences.
基金State Key Laboratory of Satellite Navigation System and Equipment Technology(CEPNT-2017KF-02)the Natural Science Foundation of China(11802119)Fundamental Research Funds for Central Universities(NT2019023)。
文摘Aimed at the problem of final translation of space rendezvous for the applications such as docking,inspection and tracking,optimal straight-line guidance algorithm based on pulse/continuous low-thrust in the context of Clohessy-Wiltshire dynamics is proposed.Two modes of guidance strategy:varying-speed and fixed-speed approaching scheme for V-bar and R-bar approach by using constant/finite low-thrust propulsion respectively are studied,and the corresponding fuel-optimal conditions are obtained.Numerical simulation is conducted to verify and test the proposed algorithms.The results show that there is generally no different between the fuel consumptions by using the two different approaching modes for V-bar case.However,the conclusion for Rbar case is different that the using of continuous low-thrust cost more fuel and transfer time.
基金supported in part by the Natural Science Foundation of China(11802119)Science and Technology on Aerospace Flight Dynamics Laboratory(6142210200306)Foundation of Science and Technology on Space Intelligent Control Laboratory(6142208200303)。
文摘As to solve the collaborative relative navigation problem for near-circular orbiting small satellites in close-range under GNSS denied environment,a novel consensus constrained relative navigation algorithm based on the lever arm effect of the sensor offset from the spacecraft center of mass is proposed.Firstly,the orbital propagation model for the relative motion of multi-spacecraft is established based on Hill-Clohessy-Wiltshire dynamics and the line-of-sight measurement under sensor offset condition is modeled in Local Vertical Local Horizontal frame.Secondly,the consensus constraint model for the relative orbit state is constructed by introducing the geometry constraint between the spacecraft,based on which the consensus unscented Kalman filter is designed.Thirdly,the observability analysis is done and the necessary conditions of the sensor offset to make the state observable are obtained.Lastly,digital simulations are conducted to verify the proposed algorithm,where the comparison to the unconstrained case is also done.The results show that the estimated error of the relative position converges very quickly,the location error is smaller than 10m under the condition of 10−3 rad level camera and 5m offset.
基金supported by Projects of Innovation and Development Pillar Program for Key Industries in Southern Xinjiang of Xinjiang Production and Construction Corps(2022DB007).
文摘Pomegranate has emerged as a viable option for the development of characteristic forest and fruit industries in various regions of China.Fermentation of pomegranate juice into wine not only enhances the economic value of the industry but also promotes the cultural significance.However,the biochemical changes that occur during fermentation and their effects on physiological functions remain unclear.In this study,we integrated non-targeted metabolomics,network pharmacology,and molecular docking technologies to investigate the metabolite changes and potential health benefits of fermented pomegranate juice.Our results indicate that quality control during fermentation can be optimized by targeting the alanine,aspartate,and glutamate metabolic pathways.A total of 62 differential metabolites were identified in non-fermented and fermented pomegranate juice.Among these,27 upregulated metabolites were analyzed using network pharmacology and molecular docking.The findings suggest that the biological targets of these metabolites may interfere with prostate cancer signaling pathways and nervous system disorders,highlighting the potential health benefits of fermented pomegranate juice.
基金supported by Projects of Innovation and Development Pillar Program for Key Industries in Southern Xinjiang of Xinjiang Production and Construction Corps(2022DB007).
文摘This study investigated the fermentation mechanism,in vivo antioxidant mechanisms,and potential health effects of mulberry wine.By utilizing yeast to ferment mulberry juice,we revealed changes in antioxidant capacity and metabolite dynamics through non-targeted metabolomics.A total of 718 differential metabolites were identified,with 586 up-regulated and 132 down-regulated during fermentation.Enrichment analysis highlighted pathways such as flavone,flavonol,and isoflavonoid biosynthesis as essential to antioxidant quality control in mulberry wine production.Bioinformatics identified core antioxidant targets in vivo,including IGF1R,BCL2L1,MET,and KDR,which exert antioxidant effects via the PI3K-Akt signaling pathway.The reliability of this analysis was supported by molecular docking,suggesting that pinoquercetin may play a significant role in the antioxidant mechanisms of mulberry wine.Analyses of the KEGG and DO databases suggested that mulberry wine may help prevent bladder cancer and reproductive system tumors,providing valuable insights into its fermentation process and associated health benefits.
基金supported by Science and Technology Plan Project of Xinjiang Production and Construction Crops(2023AB004)Research Initiation Project for High-level Talents of Shihezi University(RCZK202431)General Program of Natural Science Foundation of Xinjiang Production and Construction Corps(2025DA040).
文摘This study explores the fermentation mechanisms,antioxidant and anti-inflammatory properties,and health benefits of lactic acid bacteria-fermented grape juice using“Thompson Seedless”juice.Non-targeted metab-olomics and systems biology approaches were employed to investigate metabolite changes and associated bio-logical effects.Fermentation significantly increased total phenolic content and ABTS+radical scavenging capacity,altering the metabolic profile with 541 differential metabolites(254 upregulated,287 downregulated).Enrichment analysis highlighted carbohydrate and amino acid metabolism pathways contributing to flavor and health benefits.Systems biology revealed that key post-fermentation metabolites targeted Epidermal Growth Factor Receptor(EGFR),Proto-oncogene tyrosine-protein kinase(SRC),Kinase insert domain receptor(KDR),Tyrosine-protein kinase(SYK),Glycogen Synthase Kinase 3 Beta(GSK3B),and activated the Relaxin signaling pathway to exert antioxidant and anti-inflammatory effects.Molecular docking confirmed strong binding af-finities between these metabolites and targets.Additionally,enrichment analysis suggested potential bladder cancer preventive functions.This research establishes a theoretical framework for developing fermented Thompson Seedless grape products and guides future cellular/animal/human studies.
