Edge-Coordinated Energy-Efficient Video Analytics for Digital Twin in 6G

Camera networks are essential to constructing fast and accurate mapping between virtual and physical space for digital twin.In this paper,with the aim of developing energy-efficient digital twin in 6G,we investigate real-time video analytics based on cameras mounted on mobile devices with edge coordination.This problem is challenging because 1)mobile devices are with limited battery life and lightweight computation capability,and 2)the captured video frames of mobile devices are continuous changing,which makes the corresponding tasks arrival uncertain.To achieve energy-efficient video analytics in digital twin,by taking energy consumption,analytics accuracy,and latency into consideration,we formulate a deep reinforcement learning based mobile device and edge coordination video analytics framework,which can utilized digital twin models to achieve joint offloading decision and configuration selection.The edge nodes help to collect the information on network topology and task arrival.Extensive simulation results demonstrate that our proposed framework outperforms the benchmarks on accuracy improvement and energy and latency reduction.

球孢白僵菌种内比较线粒体基因组学分析

【目的】明确球孢白僵菌种内线粒体基因组的分化程度。【方法】从GenBank下载已知的球孢白僵菌6个菌株线粒体基因组序列,详细分析基因组的组成结构,比较外显子区、内含子区和基因间区的碱基变异情况,分析菌株间的系统发育关系。【结果】球孢白僵菌不同菌株的线粒体基因组大小为28.8–32.3 kb,都有14个常见的核心蛋白编码基因、2个rRNA基因和25个tRNA基因,具有很强的共线性关系。但是,不同菌株含有的线粒体内含子数目存在差异(2–5个/菌株),在cox1、cox2和nad1基因中表现出内含子插入/缺失多态性,这是导致线粒体基因组大小变化的主要因素。对外显子、内含子和基因间区的碱基变异情况进行分析,发现内含子和基因间区相对变异较大,而外显子区相对变异较小。系统发育分析发现,这些球孢白僵菌菌株以很高的支持度聚在一起,具有相同内含子分布规律的菌株也具有较近的聚类关系。【结论】本研究首次报道球孢白僵菌因内含子数目不同、插入缺失突变和单核苷酸变异等在线粒体基因组上表现出较大程度的遗传分化,为认识真菌种内线粒体基因组分化提供了新的证据。

Ideal and actual childbearing in China: number, gender and timing

This paper uses a cross-temporal meta-analysis to summarize information about the ideal number of children,gender composition,and timing of childbirths during the years 1980-2015 in China.This allows a comparison between ideas about the ideal number of children and actual childbearing behavior.The results show that fertility and the ideal number of children both decreased,but that fertility was higher than the ideal number of children before 1990,and that fertility was lower than the ideal number of children thereafter.Gender preference weakened;however,the preference for sons decreased slowly.The timing of childbearing became significantly later over the study period,while the ideal age of childbearing remained relatively stable.The findings provide evidence to aid understanding of the changes in childbearing in China.

A novel simple traumatic brain injury mouse model

Background:Traumatic brain injury,one of the leading causes of death in adults under 40 years of age in the world,is frequently caused by mechanical shock,resulting in diffuse neuronal damage and long-term cognitive dysfunction.Many existing TBI animal models revival with expensive equipment or special room are needed or the processes of operations are complex and not easy to be widely used.Therefore,a simpler TBI model needs to be designed.Methods:Our TBI model is an innovation of the modeling method through air guns shutting rubber bullets.A core facet is the application of our designed rubber bullet impact device.It could focus the hitting power to the fixed site of the brain,thus triggering a mild closed head injury.Moreover,the degree of damage can be adjusted by the times of shots.Results:Our model induced blood-brain barrier leakage and diffused neuronal damage.Besides,it led to an increased level of Tau phosphorylation and resulted in cognitive dysfunction within several weeks post-injury.Conclusion:Our TBI model is not only simple and time-saving but also can simulate mild brain injuries in clinical.It is suitable for exploring pathobiological mechanisms as well as a screening of potential therapies for TBI.

Gender-health disparities: exploring the counterbalancing mechanisms of labor disadvantage and health behaviors in rural China

The health disparity associated with gender has raised attention on the rampant health inequity issues in China.This gender-health disparity is further complicated by the contrasting evidence in several substantive demographic phenomena such as the female survival paradox and female morbidity paradox.The current study pro-poses a theoretical model to reveal the counterbalancing mechanisms contributing to gender-health disparity in China.Specifically,health behaviors and labor market disadvantages are two sets of counterbalancing factors that,when considered alto-gether,reveal the true extent of gender-health disparity.Using a 2020 survey in the poverty counties in two provinces of China,the current study investigates the coun-terbalancing mechanisms in gender-health disparity through mediation and suppres-sion effects.With painful feeling and the number of chronic illnesses as depend-ent variables,this study showed that health behaviors and labor disadvantages are indeed counterbalancing mechanisms.The gender disparity in pain/chronic ill-nesses disappeared after labor disadvantages were controlled for,but reemerged in greater magnitude after health behaviors were controlled were.For chronic illnesses,the previously non-existent gender disparity emerged after health behaviors were controlled for.Were it not for women’s salubrious health behaviors,they would suf-fer worse pain and chronic illnesses than men’s.This study informs the literature of the hidden counterbalancing mechanisms in gender-health disparity,and women’s inferior position in formal and informal labor domains blocks the goal of eradicating health inequity in China.