The conventional direct position determination（DPD） algorithm processes all received signals on a single sensor.When sensors have limited computational capabilities or energy storage,it is desirable to distribute th...The conventional direct position determination（DPD） algorithm processes all received signals on a single sensor.When sensors have limited computational capabilities or energy storage,it is desirable to distribute the computation among other sensors.A distributed adaptive DPD（DADPD）algorithm based on diffusion framework is proposed for emitter localization.Unlike the corresponding centralized adaptive DPD（CADPD） algorithm,all but one sensor in the proposed algorithm participate in processing the received signals and estimating the common emitter position,respectively.The computational load and energy consumption on a single sensor in the CADPD algorithm is distributed among other computing sensors in a balanced manner.Exactly the same iterative localization algorithm is carried out in each computing sensor,respectively,and the algorithm in each computing sensor exhibits quite similar convergence behavior.The difference of the localization and tracking performance between the proposed distributed algorithm and the corresponding CADPD algorithm is negligible through simulation evaluations.展开更多
Gut microbiota plays a crucial role in the pathophysiology of depression.This study aimed to explore the antidepressant effect of mature whole Citrus aurantium fruit extract(FEMC)in the chronic unpredictable mild stre...Gut microbiota plays a crucial role in the pathophysiology of depression.This study aimed to explore the antidepressant effect of mature whole Citrus aurantium fruit extract(FEMC)in the chronic unpredictable mild stress(CUMS)model.The behavioral tests were applied to assess antidepressant effect and 16S rRNA sequencing was used to analyze the changes of gut microbiota.The results showed that the major components of FEMC were naringin and neohesperidin and significantly increased the sucrose preference index of the mice.FEMC also could reduce the feeding latency in an open field test and the rest time in a novelty suppressed feeding test.In addition,FEMC could increase CUMS-induced reduction in the levels of BDNF,PSD95,and SYN in the hippocampus.Moreover,FEMC intervention slightly decreased the ratio of Firmicutes to Bacteroidota.Meanwhile,FEMC reduced the abundance of the Prevotellaceae_Ga6A1_group,[Ruminococcus]_torques_group,which have been reported to be closely related to inflammation.Bioinformatics analysis revealed that mitogen-activated protein kinase(MAPK)signaling pathway and lipopolysaccharide biosynthesis were involved in the anti-inflammatory effect of FEMC in the CUMS animal model.Finally,the ELISA results showed that FEMC could significantly reduce the expression of pro-inflammatory cytokines IL-6 and TNF-αin the serum of depressive mice.Our results suggest FEMC can am eliorate depressive behavior by i nhibiting gut microbiota-mediated inflammation in mice.展开更多
[Objectives]To explore the trend of brands towards the design of waist protection products through data mining,and to provide reference for the design concept of the contour of waist protection pillow.[Methods]The str...[Objectives]To explore the trend of brands towards the design of waist protection products through data mining,and to provide reference for the design concept of the contour of waist protection pillow.[Methods]The structural design information of all waist protection equipment was collected from the national Internet platform,and the data were classified and a database was established.IBM SPSS 26.0 and MATLAB 2018a were used to analyze the data and tabulate them in Tableau 2022.4.After the association rules were clarified,the data were imported into Cinema 4D R21 to create the concept contour of waist protection pillow.[Results]The average and standard deviation of the single airbag design were the highest in all groups,with an average of 0.511 and a standard deviation of 0.502.The average and standard deviation of the upper and lower dual airbags were the lowest in all groups,with an average of 0.015 and a standard deviation of 0.120;the correlation coefficient between single airbag and 120°arc stretching was 0.325,which was positively correlated with each other(P<0.01);the correlation coefficient between multiple airbags and 360°encircling fitting was 0.501,which was positively correlated with each other and had the highest correlation degree(P<0.01).[Conclusions]The single airbag design is well recognized by companies,and has received the highest attention among all brand products.While focusing on single airbag design,most brands will consider the need to add 120°arc stretching elements in product design.At the time of focusing on multiple airbag design,some brands believe that 360°encircling fitting elements need to be added to the product,and the correlation between the two is the highest among all groups.展开更多
The benefits of Lever Positioning Manipulation (LPM) in the treatment of lumbar disc herniation have been widely recognized. The emergence of virtual reality (VR) technology in the field of medicine and the successful...The benefits of Lever Positioning Manipulation (LPM) in the treatment of lumbar disc herniation have been widely recognized. The emergence of virtual reality (VR) technology in the field of medicine and the successful application of augmented reality (AR) technology in the field of surgery have brought new thinking to manipulation researchers on the treatment of lumbar disc herniation (LDH) in the era of artificial intelligence (AI). In this study, the development trend and clinical efficacy of VR technology were discussed from the development process of this technology, and the combination of information interaction technology in the field of chiropractic was found from the existing research approach of lever positioning treatment of LDH, in order to provide a useful reference for researchers.展开更多
A two-way satellite time and frequency transfer(TWSTFT) device equipped in the BeiDou navigation satellite system(BDS)can calculate clock error between satellite and ground master clock. TWSTFT is a real-time method w...A two-way satellite time and frequency transfer(TWSTFT) device equipped in the BeiDou navigation satellite system(BDS)can calculate clock error between satellite and ground master clock. TWSTFT is a real-time method with high accuracy because most system errors such as orbital error, station position error, and tropospheric and ionospheric delay error can be eliminated by calculating the two-way pseudorange difference. Another method, the multi-satellite precision orbit determination(MPOD)method, can be applied to estimate satellite clock errors. By comparison with MPOD clock estimations, this paper discusses the applications of the BDS TWSTFT clock observations in satellite clock measurement, satellite clock prediction, navigation system time monitor, and satellite clock performance assessment in orbit. The results show that with TWSTFT clock observations, the accuracy of satellite clock prediction is higher than MPOD. Five continuous weeks of comparisons with three international GNSS Service(IGS) analysis centers(ACs) show that the reference time difference between BeiDou time(BDT) and golbal positoning system(GPS) time(GPST) realized IGS ACs is in the tens of nanoseconds. Applying the TWSTFT clock error observations may obtain more accurate satellite clock performance evaluation in the 104 s interval because the accuracy of the MPOD clock estimation is not sufficiently high. By comparing the BDS and GPS satellite clock performance, we found that the BDS clock stability at the 103 s interval is approximately 10.12, which is similar to the GPS IIR.展开更多
Flexible mechanical sensors offer extensive application prospects in the field of smart wearables.However,developing highly sensitive,flexible mechanical sensors that can simultaneously detect strain and pressure rema...Flexible mechanical sensors offer extensive application prospects in the field of smart wearables.However,developing highly sensitive,flexible mechanical sensors that can simultaneously detect strain and pressure remains a significant challenge.Herein,we present a flexible mechanical sensor based on AgNPs/MWCNTsCOOH/PDA/PU/PVB nanofiber-covered yarn(AMPPPNY)featuring a DNA-like double-helix wrinkled structure.The sensor is fabricated by electrospraying polyvinyl butyral(PVB)onto a pre-stretched double-helix elastic yarn,followed by electrospinning a polyurethane(PU)nanofiber membrane and inducing the self-polymerization of dopamine(DA)to create an adhesive layer.Then,one-dimensional carboxylated multi-walled carbon nanotubes(MWCNTs-COOH)and zero-dimensional silver nanoparticles(AgNPs)are dispersed onto the structure,synergistically forming a stable conductive network for efficient signal transmission.The integration of conductive fillers with different dimensionalities and DNA-like double-helix wrinkled structure endows the sensor with high strain sensitivity(gauge factor of 11,977)in the strain range of 0-310%and high pressure sensitivity(0.475 kPa^(-1))in the pressure range of 0-2 kPa.Moreover,the fabricated sensor exhibits rapid response and recovery times(130 ms/135 ms)and outstanding cyclic stability(over 10,000 cycles of both strain and pressure).Next,the fibrous sensor is weaved into a large-area fabric,and the developed smart textiles demonstrate impressive performance in detecting both subtle and large human movements.The proposed sensor is a promising candidate for flexible wearable applications.展开更多
Aqueous zinc-iodine batteries(AZIBs)have attracted significant attention as the most promising next-generation energy storage technology due to their low cost,inherent safety,and high energy density.However,their prac...Aqueous zinc-iodine batteries(AZIBs)have attracted significant attention as the most promising next-generation energy storage technology due to their low cost,inherent safety,and high energy density.However,their practical application is hindered by the poor electronic conductivity of iodine cathodes and the severe shuttling effect of intermediate polyiodides.Here,we report a novel micropores carbon framework(MCF)synthesized from waste coffee grounds via a facile carbonization-activation process.The resultant MCF features an ultrahigh specific surface area and a high density of micropores,which not only physically confine iodine species to minimize iodine loss but also enhance the electronic conductivity of the composite cathode.Furthermore,biomass-derived heteroatom dopings(nitrogen functionalities)facilitate effective chemical anchoring of polyiodide intermediates,thereby mitigating the shuttle effect.UV–visible spectroscopy and electrochemical kinetic analyses further confirm the rapid transformation and inhibition mechanism of iodine species by MCF.Consequently,the MCF/I_(2)cathode delivers superior specific capacities of 238.3 mA h g^(−1)at 0.2 A g^(−1)and maintains outstanding cycling performance with a capacity retention of 85.2%after 1200 cycles at 1.0 A g^(−1).This work not only provides an important reference for the design of high-performance iodine-host porous carbon materials but also explores new paths for the sustainable,high-value utilization of waste biomass resources.展开更多
基金supported by the National Natural Science Foundation of China(61101173)
文摘The conventional direct position determination（DPD） algorithm processes all received signals on a single sensor.When sensors have limited computational capabilities or energy storage,it is desirable to distribute the computation among other sensors.A distributed adaptive DPD（DADPD）algorithm based on diffusion framework is proposed for emitter localization.Unlike the corresponding centralized adaptive DPD（CADPD） algorithm,all but one sensor in the proposed algorithm participate in processing the received signals and estimating the common emitter position,respectively.The computational load and energy consumption on a single sensor in the CADPD algorithm is distributed among other computing sensors in a balanced manner.Exactly the same iterative localization algorithm is carried out in each computing sensor,respectively,and the algorithm in each computing sensor exhibits quite similar convergence behavior.The difference of the localization and tracking performance between the proposed distributed algorithm and the corresponding CADPD algorithm is negligible through simulation evaluations.
基金supported by the National Key Research and Development Program of China(2022YFD2100804)the Natural Science Foundation of ChangSha(kq2202334)+1 种基金Agricultural Science and Technology Innovation Fund project of Hunan Province(2022CX02,2023CX23)Science and Technology Innovation&Entrepreneur Team of Hunan Kanglu Bio-medicine.
文摘Gut microbiota plays a crucial role in the pathophysiology of depression.This study aimed to explore the antidepressant effect of mature whole Citrus aurantium fruit extract(FEMC)in the chronic unpredictable mild stress(CUMS)model.The behavioral tests were applied to assess antidepressant effect and 16S rRNA sequencing was used to analyze the changes of gut microbiota.The results showed that the major components of FEMC were naringin and neohesperidin and significantly increased the sucrose preference index of the mice.FEMC also could reduce the feeding latency in an open field test and the rest time in a novelty suppressed feeding test.In addition,FEMC could increase CUMS-induced reduction in the levels of BDNF,PSD95,and SYN in the hippocampus.Moreover,FEMC intervention slightly decreased the ratio of Firmicutes to Bacteroidota.Meanwhile,FEMC reduced the abundance of the Prevotellaceae_Ga6A1_group,[Ruminococcus]_torques_group,which have been reported to be closely related to inflammation.Bioinformatics analysis revealed that mitogen-activated protein kinase(MAPK)signaling pathway and lipopolysaccharide biosynthesis were involved in the anti-inflammatory effect of FEMC in the CUMS animal model.Finally,the ELISA results showed that FEMC could significantly reduce the expression of pro-inflammatory cytokines IL-6 and TNF-αin the serum of depressive mice.Our results suggest FEMC can am eliorate depressive behavior by i nhibiting gut microbiota-mediated inflammation in mice.
基金Supported by Municipal Public Welfare Science and Technology Project of Zhoushan Science and Technology Bureau,Zhejiang Province(2021C31064).
文摘[Objectives]To explore the trend of brands towards the design of waist protection products through data mining,and to provide reference for the design concept of the contour of waist protection pillow.[Methods]The structural design information of all waist protection equipment was collected from the national Internet platform,and the data were classified and a database was established.IBM SPSS 26.0 and MATLAB 2018a were used to analyze the data and tabulate them in Tableau 2022.4.After the association rules were clarified,the data were imported into Cinema 4D R21 to create the concept contour of waist protection pillow.[Results]The average and standard deviation of the single airbag design were the highest in all groups,with an average of 0.511 and a standard deviation of 0.502.The average and standard deviation of the upper and lower dual airbags were the lowest in all groups,with an average of 0.015 and a standard deviation of 0.120;the correlation coefficient between single airbag and 120°arc stretching was 0.325,which was positively correlated with each other(P<0.01);the correlation coefficient between multiple airbags and 360°encircling fitting was 0.501,which was positively correlated with each other and had the highest correlation degree(P<0.01).[Conclusions]The single airbag design is well recognized by companies,and has received the highest attention among all brand products.While focusing on single airbag design,most brands will consider the need to add 120°arc stretching elements in product design.At the time of focusing on multiple airbag design,some brands believe that 360°encircling fitting elements need to be added to the product,and the correlation between the two is the highest among all groups.
基金Supported by Zhoushan Young and Middle-aged Clinical Famous TCM Physician Project in 2024(Zhoushan Finance and Social Security[2024]No.52).
文摘The benefits of Lever Positioning Manipulation (LPM) in the treatment of lumbar disc herniation have been widely recognized. The emergence of virtual reality (VR) technology in the field of medicine and the successful application of augmented reality (AR) technology in the field of surgery have brought new thinking to manipulation researchers on the treatment of lumbar disc herniation (LDH) in the era of artificial intelligence (AI). In this study, the development trend and clinical efficacy of VR technology were discussed from the development process of this technology, and the combination of information interaction technology in the field of chiropractic was found from the existing research approach of lever positioning treatment of LDH, in order to provide a useful reference for researchers.
基金supported by the National Natural Sciences Foundation of China(Grant No.41574029)Youth Innovation Promotion Association CAS(Grant No.2016242)
文摘A two-way satellite time and frequency transfer(TWSTFT) device equipped in the BeiDou navigation satellite system(BDS)can calculate clock error between satellite and ground master clock. TWSTFT is a real-time method with high accuracy because most system errors such as orbital error, station position error, and tropospheric and ionospheric delay error can be eliminated by calculating the two-way pseudorange difference. Another method, the multi-satellite precision orbit determination(MPOD)method, can be applied to estimate satellite clock errors. By comparison with MPOD clock estimations, this paper discusses the applications of the BDS TWSTFT clock observations in satellite clock measurement, satellite clock prediction, navigation system time monitor, and satellite clock performance assessment in orbit. The results show that with TWSTFT clock observations, the accuracy of satellite clock prediction is higher than MPOD. Five continuous weeks of comparisons with three international GNSS Service(IGS) analysis centers(ACs) show that the reference time difference between BeiDou time(BDT) and golbal positoning system(GPS) time(GPST) realized IGS ACs is in the tens of nanoseconds. Applying the TWSTFT clock error observations may obtain more accurate satellite clock performance evaluation in the 104 s interval because the accuracy of the MPOD clock estimation is not sufficiently high. By comparing the BDS and GPS satellite clock performance, we found that the BDS clock stability at the 103 s interval is approximately 10.12, which is similar to the GPS IIR.
基金National Natural Science Foundation of China,51503168,Chengkun LiuTaishan Scholar Foundation of Shandong Province,tsqn201909100,Chengkun LiuInnovation Capability Support Plan of Shaanxi,China,2020PT-043,Chengkun Liu。
文摘Flexible mechanical sensors offer extensive application prospects in the field of smart wearables.However,developing highly sensitive,flexible mechanical sensors that can simultaneously detect strain and pressure remains a significant challenge.Herein,we present a flexible mechanical sensor based on AgNPs/MWCNTsCOOH/PDA/PU/PVB nanofiber-covered yarn(AMPPPNY)featuring a DNA-like double-helix wrinkled structure.The sensor is fabricated by electrospraying polyvinyl butyral(PVB)onto a pre-stretched double-helix elastic yarn,followed by electrospinning a polyurethane(PU)nanofiber membrane and inducing the self-polymerization of dopamine(DA)to create an adhesive layer.Then,one-dimensional carboxylated multi-walled carbon nanotubes(MWCNTs-COOH)and zero-dimensional silver nanoparticles(AgNPs)are dispersed onto the structure,synergistically forming a stable conductive network for efficient signal transmission.The integration of conductive fillers with different dimensionalities and DNA-like double-helix wrinkled structure endows the sensor with high strain sensitivity(gauge factor of 11,977)in the strain range of 0-310%and high pressure sensitivity(0.475 kPa^(-1))in the pressure range of 0-2 kPa.Moreover,the fabricated sensor exhibits rapid response and recovery times(130 ms/135 ms)and outstanding cyclic stability(over 10,000 cycles of both strain and pressure).Next,the fibrous sensor is weaved into a large-area fabric,and the developed smart textiles demonstrate impressive performance in detecting both subtle and large human movements.The proposed sensor is a promising candidate for flexible wearable applications.
基金financial support from the National Natural Science Foundation of China(U23B20166,U21A20289)International Joint Doctoral Education Fund of Beihang University+5 种基金Open Fund of Key Laboratory of Biodiversity and Environment on the Qinghai-Tibet Plateau,Ministry of Education(KLBE2024001)the Australian Research Council(ARC)through the Future Fellowship(FT210100298)Discovery Project(DP220100603)Linkage Project(LP210200504,LP220100088,LP230200897)Industrial Transformation Research Hub(IH240100009)schemesthe Australian Government through the Cooperative Research Centres Projects(CRCPXIII000077).
文摘Aqueous zinc-iodine batteries(AZIBs)have attracted significant attention as the most promising next-generation energy storage technology due to their low cost,inherent safety,and high energy density.However,their practical application is hindered by the poor electronic conductivity of iodine cathodes and the severe shuttling effect of intermediate polyiodides.Here,we report a novel micropores carbon framework(MCF)synthesized from waste coffee grounds via a facile carbonization-activation process.The resultant MCF features an ultrahigh specific surface area and a high density of micropores,which not only physically confine iodine species to minimize iodine loss but also enhance the electronic conductivity of the composite cathode.Furthermore,biomass-derived heteroatom dopings(nitrogen functionalities)facilitate effective chemical anchoring of polyiodide intermediates,thereby mitigating the shuttle effect.UV–visible spectroscopy and electrochemical kinetic analyses further confirm the rapid transformation and inhibition mechanism of iodine species by MCF.Consequently,the MCF/I_(2)cathode delivers superior specific capacities of 238.3 mA h g^(−1)at 0.2 A g^(−1)and maintains outstanding cycling performance with a capacity retention of 85.2%after 1200 cycles at 1.0 A g^(−1).This work not only provides an important reference for the design of high-performance iodine-host porous carbon materials but also explores new paths for the sustainable,high-value utilization of waste biomass resources.
