The conventional approach to investigating functional connectivity in the block-designed study usually concatenates task blocks or employs residuals of task activation.While providing many insights into brain function...The conventional approach to investigating functional connectivity in the block-designed study usually concatenates task blocks or employs residuals of task activation.While providing many insights into brain functions,the block design adds more manipulation in functional network analysis that may reduce the purity of the blood oxygenation level-dependent signal.Recent studies utilized one single long run for task trials of the same condition,the so-called continuous design,to investigate functional connectivity based on task functional magnetic resonance imaging.Continuous brain activities associated with the single-task condition can be directly utilized for task-related functional connectivity assessment,which has been examined for working memory,sensory,motor,and semantic task experiments in previous research.But it remains unclear how the block and continuous design influence the assessment of task-related functional connectivity networks.This study aimed to disentangle the separable effects of block/continuous design and working memory load on task-related functional connectivity networks,by using repeated-measures analysis of variance.Across 50 young healthy adults,behavioral results of accuracy and reaction time showed a significant main effect of design as well as interaction between design and load.Imaging results revealed that the cingulo-opercular,fronto-parietal,and default model networks were associated with not only task activation,but significant main effects of design and load as well as their interaction on intra-and inter-network functional connectivity and global network topology.Moreover,a significant behavior-brain association was identified for the continuous design.This work has extended the evidence that continuous design can be used to study task-related functional connectivity and subtle brain-behavioral relationships.展开更多
The concept of Internet of Everything is like a revolutionary storm,bringing the whole society closer together.Internet of Things(IoT)has played a vital role in the process.With the rise of the concept of Industry 4.0...The concept of Internet of Everything is like a revolutionary storm,bringing the whole society closer together.Internet of Things(IoT)has played a vital role in the process.With the rise of the concept of Industry 4.0,intelligent transformation is taking place in the industrial field.As a new concept,an industrial IoT system has also attracted the attention of industry and academia.In an actual industrial scenario,a large number of devices will generate numerous industrial datasets.The computing efficiency of an industrial IoT system is greatly improved with the help of using either cloud computing or edge computing.However,privacy issues may seriously harmed interests of users.In this article,we summarize privacy issues in a cloud-or an edge-based industrial IoT system.The privacy analysis includes data privacy,location privacy,query and identity privacy.In addition,we also review privacy solutions when applying software defined network and blockchain under the above two systems.Next,we analyze the computational complexity and privacy protection performance of these solutions.Finally,we discuss open issues to facilitate further studies.展开更多
Scholars have a variety of theoretical explanations for housing price growth. However, few scholars have studied the internal influence mechanism among urbanization, land finance, and housing price. Based on the data ...Scholars have a variety of theoretical explanations for housing price growth. However, few scholars have studied the internal influence mechanism among urbanization, land finance, and housing price. Based on the data of 182 prefecture-level cities from 2009 to 2016, this paper studies the influence of land finance on housing price under different urbanization rate levels. The study finds that with the increase of urbanization rate, the effect of land finance on housing price presents a "U" shape.Specifically, an increase in land finance by 1% results in a corresponding increase in average housing price by 0.18%, with relatively low urbanization rate, 0.06% with medium level of urbanization rate,and 0.38% with high level of urbanization rate.展开更多
An improved aerobiological virus sampling method was developed based on adding adsorptive nanoparticles in samplers for concentrating viruses in sampling liquid buffers.The objectives of this research were to select e...An improved aerobiological virus sampling method was developed based on adding adsorptive nanoparticles in samplers for concentrating viruses in sampling liquid buffers.The objectives of this research were to select effective adsorptive materials and optimize sampling parameters for increasing recovery of airborne viruses,such as influenza A virus or respiratory syndrome virus(RSV).Three kinds of polycation nanoparticles were evaluated for direct effects on absorption and desorption of influenza virus hemagglutinin and DNA.Chitosan particles showed good performance in absorption and desorption for both influenza virus hemagglutinin and DNA.A subsequent study evaluated the effects of collection buffer,pH and sampling time on the recovery of aerosolized viruses using a method for making direct comparisons of three treatments.The results demonstrated that various components in air-sampling collection buffer,impinger model,and sampling time,independently influenced the recovery of viruses.It was shown that adsorptive samplers with air disperser had the highest levels of sensitivity and repeatability in virus sampling.Both unspecifically adsorptive chitosan particles and specifically adsorptive particles labeled specific antibody to virus significantly enhanced recovery rate of aerosolized viruses.We succeeded to sample low level different pathogen viruses in outdoor environments with the optimized sampling system.展开更多
基金supported by the National Natural Science Foundation of China(62071109 and 61871420)the Provincial Natural Science Foundation of Sichuan(2022NSFSC0504).
文摘The conventional approach to investigating functional connectivity in the block-designed study usually concatenates task blocks or employs residuals of task activation.While providing many insights into brain functions,the block design adds more manipulation in functional network analysis that may reduce the purity of the blood oxygenation level-dependent signal.Recent studies utilized one single long run for task trials of the same condition,the so-called continuous design,to investigate functional connectivity based on task functional magnetic resonance imaging.Continuous brain activities associated with the single-task condition can be directly utilized for task-related functional connectivity assessment,which has been examined for working memory,sensory,motor,and semantic task experiments in previous research.But it remains unclear how the block and continuous design influence the assessment of task-related functional connectivity networks.This study aimed to disentangle the separable effects of block/continuous design and working memory load on task-related functional connectivity networks,by using repeated-measures analysis of variance.Across 50 young healthy adults,behavioral results of accuracy and reaction time showed a significant main effect of design as well as interaction between design and load.Imaging results revealed that the cingulo-opercular,fronto-parietal,and default model networks were associated with not only task activation,but significant main effects of design and load as well as their interaction on intra-and inter-network functional connectivity and global network topology.Moreover,a significant behavior-brain association was identified for the continuous design.This work has extended the evidence that continuous design can be used to study task-related functional connectivity and subtle brain-behavioral relationships.
基金the National Natural Science Foundation of China(Grant No.61871023 and 61931001)Beijing Natural Science Foundation(Grant No.4202054).
文摘The concept of Internet of Everything is like a revolutionary storm,bringing the whole society closer together.Internet of Things(IoT)has played a vital role in the process.With the rise of the concept of Industry 4.0,intelligent transformation is taking place in the industrial field.As a new concept,an industrial IoT system has also attracted the attention of industry and academia.In an actual industrial scenario,a large number of devices will generate numerous industrial datasets.The computing efficiency of an industrial IoT system is greatly improved with the help of using either cloud computing or edge computing.However,privacy issues may seriously harmed interests of users.In this article,we summarize privacy issues in a cloud-or an edge-based industrial IoT system.The privacy analysis includes data privacy,location privacy,query and identity privacy.In addition,we also review privacy solutions when applying software defined network and blockchain under the above two systems.Next,we analyze the computational complexity and privacy protection performance of these solutions.Finally,we discuss open issues to facilitate further studies.
基金Supported by Natural Science Foundation of China(71850014,71532013,71573244,71974180)。
文摘Scholars have a variety of theoretical explanations for housing price growth. However, few scholars have studied the internal influence mechanism among urbanization, land finance, and housing price. Based on the data of 182 prefecture-level cities from 2009 to 2016, this paper studies the influence of land finance on housing price under different urbanization rate levels. The study finds that with the increase of urbanization rate, the effect of land finance on housing price presents a "U" shape.Specifically, an increase in land finance by 1% results in a corresponding increase in average housing price by 0.18%, with relatively low urbanization rate, 0.06% with medium level of urbanization rate,and 0.38% with high level of urbanization rate.
文摘An improved aerobiological virus sampling method was developed based on adding adsorptive nanoparticles in samplers for concentrating viruses in sampling liquid buffers.The objectives of this research were to select effective adsorptive materials and optimize sampling parameters for increasing recovery of airborne viruses,such as influenza A virus or respiratory syndrome virus(RSV).Three kinds of polycation nanoparticles were evaluated for direct effects on absorption and desorption of influenza virus hemagglutinin and DNA.Chitosan particles showed good performance in absorption and desorption for both influenza virus hemagglutinin and DNA.A subsequent study evaluated the effects of collection buffer,pH and sampling time on the recovery of aerosolized viruses using a method for making direct comparisons of three treatments.The results demonstrated that various components in air-sampling collection buffer,impinger model,and sampling time,independently influenced the recovery of viruses.It was shown that adsorptive samplers with air disperser had the highest levels of sensitivity and repeatability in virus sampling.Both unspecifically adsorptive chitosan particles and specifically adsorptive particles labeled specific antibody to virus significantly enhanced recovery rate of aerosolized viruses.We succeeded to sample low level different pathogen viruses in outdoor environments with the optimized sampling system.
