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low-Brightness Object Recognition Based on Deep learning

Computers, Materials & Continua 2024年第5期79卷 1757-1773页

作者： Shu-Yin Chiang ting-Yu lin Department of Information and Telecommunications engineering Ming Chuan UniversityTaoyuan City333Taiwan

This research focuses on addressing the chal.enges associated with image detection in low-light environments,particularly by applying artificial intelligence techniques to machine vision and object recognition *** primary goal is to tackle issues related to recognizing objects with low brightness *** this study,the Intel Real.ense lidar Camera l515 is used to simultaneously capture color information and 16-bit depth information *** detection scenarios are categorized into normal brightness and low brightness *** the system determines a normal brightness environment,normal brightness images are recognized using deep learning *** low-brightness situations,three methods are proposed for *** first method is the SegmentationwithDepth image(SD)methodwhich invol.es segmenting the depth image,creating amask from the segmented depth image,mapping the obtained mask onto the true color(RGB)image to obtain a backgroundreduced RGB image,and recognizing the segmented *** second method is theHDVmethod(hue,depth,val.e)which combines RGB images converted to HSV images(hue,saturation,val.e)with depth images D to form HDV images for *** third method is the HSD(hue,saturation,depth)method which similarly combines RGB images converted to HSV images with depth images D to form HSD images for *** experimental results,in normal brightness environments,the average recognition rate obtained using image recognition methods is 91%.For low-brightness environments,using the SD method with original images for training and segmented images for recognition achieves an average recognition rate of over 82%.TheHDVmethod achieves an average recognition rate of over 70%,while the HSD method achieves an average recognition rate of over 84%.The HSD method allows for a quick and convenient low-light object recognition *** research outcome can be appl.ed to nighttime surveillance systems or nighttime road safety systems

关键词： low-brightness depth image image segmentation image recognition HDV HSD

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Dynamically lithium-compensated polymer artificial SeI to assist highly stable lithium-rich manganese-based anode-free lithium metal batteries

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Rare Metals 2024年第6期43卷 2527-2535页

作者： Ming-Ji Peng Jin-Qiu Zhou ting-ting Han Yang Zhou Jie liu Na Xu Zhen-Kang Wang Wen-Bin lin Cheng-lin Yan Key laboratory of Core Technology of High Specific energy Battery and Key Materials for Petroleum and Chemical Industry College of EnergySoochow UniversitySuzhou 215006China light Industry Instituteof electrochemical Power Sources Suzhou 215006China School of Chemistry and Chemical.engineering Nantong UniversityNantong 226019China e-mail:jliu93@*** State Key laboratory of Space Power-Sources Technology Shanghai Institute of Space Power-SourcesShanghai 200245China Centre energie Materiaux et TélécommunicationsInstitut National de la Recherche ScientifiqueVarennesQC J3X 1S2Canada Zhangjiagang Industrial Technologies Soochow UniversitySuzhou 215006China

Owing to the unique structure,anode-free lithium metal batteries(AFlMBs)have higher energy density and lower production cost than traditional lithium metal batteries(lMBs)or lithium-ion batteries(lIBs),However,AFlMBs suffer from an inherently finite li reservoir and exhibit poor cycle stability,low Coulombic efficiency(Ce)and severe dendrite *** this work,polydiallyl lithium disulfide(PDS-li)was successfully synthesized and coated on Cu current col.ector by electrochemical *** PDS-li acts as an additional lithium resource to compensate for the irreversible loss of lithium during *** addition,the special structure and lithiophilicity of PDS-li contribute to lower nucleation overpotential and uniform lithium *** coupled with li-rich manganese-based(lRM)cathode of li1.2Mn0.54Ni0.13Co0.13O2,the anode-free full cell.exhibits significantly improved cycle stability over 100 cycles and capacity retention of 63.3%and 57%after 80 and 100 cycles,*** bel.eve that PDS-li can be used to ensure stable cycling performance and high-energy-density in AFlMBs.

关键词： Anode-free Artificial solid electrolyte interphase(SeI) lithium metal batteries lithium-rich cathode Finite element simulation

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What is the Role of Gravity,Turbulence and Magnetic Fields in High-mass Star Formation Clouds?

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Research in Astronomy and Astrophysics 2024年第6期24卷 21-27页

作者： An-Xu luo Hong-li liu Guang-Xing li Sirong Pan Dong-ting Yang School of Physics and Astronomy Yunnan UniversityKunming 650091China South-Western Institute for Astronomy Research Yunnan UniversityKunming 650500China

To explore the potential role of gravity,turbulence and magnetic fields in high-mass star formation in molecular clouds,this study revisits the velocity dispersion–size(σ–l)and density–size(ρ–l)scalings and the associated turbulent energy spectrum using an extensive data *** sample includes various hierarchical density structures in high-mass star formation clouds,across scales of 0.01–100 *** observeσ∝l^(0.26)andρ∝l^(-1.54)scalings,converging toward a virial.equilibrium state.A nearly flat virial parameter–mass(α_(vir)-M)distribution is seen across all density scales,withα_(vir)val.es centered around unity,suggesting a global.equilibrium maintained by the interplay between gravity and turbulence across multiple *** turbulent energy spectrum(e(k))analysis,based on theσ–l andρ–l scalings,yields a characteristic e(k)∝k^(-1.52).These findings indicate the potential significance of gravity,turbulence,and possibly magnetic fields in regulating dynamics of molecular clouds and high-mass star formation therein.

关键词： ISM:clouds stars:formation stars:kinematics and dynamics

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Systematic evaluation of Guidelines for the Diagnosis and Treatment of Hepatitis e Virus Infection

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Journal of Clinical and Translational Hepatology 2024年第8期12卷 739-749页

作者： ting Gu Cai-Ying Zheng Yan-Qin Deng Xiao-Feng Yang Wei-Min Bao Ying-Mei Tang Department of Gastroenterology Second Affiliated Hospital of Kunming Medical UniversityKunming Medical UniversityKunmingYunnanChina Second Affiliated Hospital of Kunming Medical University KunmingYunnanChina Department of Colorectal Surgery The First People’s Hospital of Yunnan ProvinceKunmingYunnanChina

Background and Aims:The hepatitis e virus(HeV)is a zoonotic disease,and infection with HeV in humans primarily causes acute infections and can progress to chronic manifestation in immunocompromised *** the past decade,guidelines for diagnosing and treating HeV infection have been *** study aimed to systematically assess the quality of current guidelines for diagnosing and treating HeV infection,and we analyzed the differences in guideline quality and primary recommendations and explored possible reasons for these ***:Guidelines published between 2013 and 2022 were searched,and studies were identified using selection *** study assessed the quality of the included guidelines using the Appraisal of Guidelines for Research and evaluation tool.extracted the primary recommendations in the guidelines,determined the highest level of evidence supporting the recommendations,and reclassified the evidence using the Oxford Centre for evidence-Based Medicine grading ***:Seven guidelines were included in the final *** quality of the guidelines varied *** discrepancies may have been caused by the lack of external.experts,the failure to consider infl.encing factors in guideline application,and the lack of consideration of the public’s *** of the heterogeneity in primary recommendations revealed differences in algorithms for managing chronic HeV infection,the dosage of ribavirin,and a low level of evidence supporting the primary ***:Guideline quality and primary recommendations vary *** by guideline developers and researchers would facilitate updating and applying guidelines for diagnosing and treating HeV infection.

关键词： Hepatitis e virus Guidelines Diagnosis Treatment Systematic evaluation

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Chromosome-level genome and population genomics of the intermediate horseshoe bat(Rhinolophus affinis)reveal the molecular basis of virus tolerance in Rhinolophus and echolocation call frequency variation

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Zoological Research 2024年第5期45卷 1147-1160页

作者： le Zhao Jiaqing Yuan Guiqiang Wang Haohao Jing Chen Huang lulu Xu Xiao Xu ting Sun Wu Chen Xiuguang Mao Gang li Col.ege of life Sciences Shaanxi Normal UniversityXi’anShaanxi 710119China Qinling-Bashan Mountains Bioresources Comprehensive Development C.I.C. School of Bioscience and EngineeringShaanxi University of TechnologyHanzhongShaanxi 723001China Guangzhou Zoo GuangzhouGuangdong 510070China School of ecological and environmental Sciences East China Normal UniversityShanghai 200241China

Horseshoe bats(genus Rhinolophus,family Rhinolophidae)represent an important group within chiropteran phylogeny due to their distinctive traits,including constant high-frequency echolocation,rapid karyotype evolution,and unique immune *** in evolutionary biology,supported by high-quality reference genomes and comprehensive whole-genome data,have significantly enhanced our understanding of species origins,speciation mechanisms,adaptive evolutionary processes,and phenotypic ***,genomic research and understanding of the evolutionary patterns of Rhinolophus are severely constrained by limited data,with only a single published genome of *** currently *** this study,we constructed a high-quality chromosome-level reference genome for the intermediate horseshoe bat(***).Comparative genomic analyses revealed potential genetic characteristics associated with virus tolerance in ***,we observed expansions in several immune-related gene famil.es and identified various genes functionally associated with the SARS-CoV-2 signaling pathway,DNA repair,and apoptosis,which displayed signs of rapid *** addition,we observed an expansion of the major histocompatibility complex class II(MHC-II)region and a higher copy number of the HlA-DQB2 gene in horseshoe bats compared to other chiropteran *** on whole-genome resequencing and population genomic analyses,we identified multiple candidate loci(e.g.,GlI3)associated with variations in echolocation call frequency across *** *** research not only expands our understanding of the genetic characteristics of the Rhinolophus genus but also establishes a valuable foundation for future research.

关键词： Reference-quality genome Comparative genomics Population genomics Positive selection Bats

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疫情管控期西安PM_(2.5)和O_(3)污染特征及成因分析

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环境科学 2024年第4期45卷 1963-1974页

作者：原晓红张强李琦谢文豪刘跃廷樊亭亭姜旭朋西北大学城市与环境学院西安710127

基于西安疫情管控期空气监测数据,分析PM_(2.5)和O_(3)的时空序列特征,从PM_(2.5)源解析、O_(3)前体物VOCs溯源、气象要素和区域传输方向探讨污染成因.结果表明:(1)管控期PM_(2.5)和O_(3)分别同比上升20.39%和23.72%,其他参数均下降;与... 详细信息

基于西安疫情管控期空气监测数据,分析PM_(2.5)和O_(3)的时空序列特征,从PM_(2.5)源解析、O_(3)前体物VOCs溯源、气象要素和区域传输方向探讨污染成因.结果表明:(1)管控期PM_(2.5)和O_(3)分别同比上升20.39%和23.72%,其他参数均下降;与管控前后时期相比,管控期PM_(2.5)和PM_(10)日均值协同变化趋势减弱,O_(3)和NO_(2)此消彼长趋势增强;相比去年同期,PM_(2.5)小时值升高11~19μg·m^(-3),O_(3)小时值夜间18:00~23:00升幅增大,为10~19μg·m^(-3).(2)污染物浓度变化呈现一定的空间聚集协同性;受地形及植被阻滞吸附影响,PM_(2.5)污染集中在北部,由于城郊NO_(2)滴定效果弱于城区,表现为南部郊区O_(3)污染较为严重.(3)管控期移动源对PM_(2.5)贡献降低,化石燃料燃烧源和工艺过程源贡献升高;为防控疫情大量喷洒强氧化性的消杀剂使得含氧VOCs的体积分数升高,占比86.02%,O_(3)前体物VOCs中乙醛、丙醛和丁烯醛是优先管控物种;气象要素对于污染物浓度的影响并非简单线性关系,在RHP25区间,O_(3)浓度平均值随T升高而升高;聚类分析表明与其他时期相比,管控期本地贡献率较高,为32.80%,由于管控期O_(3)激增促进PM_(2.5)的二次生成,区域重污染传输增强了PM_(2.5)的不降反升情况.

关键词： PM_(2.5) 臭氧(O_(3)) PMF源解析臭氧生成潜势(OFP) 聚类分析

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Genomic and phenotypic signatures provide insights into the wide adaptation of a global plant invader

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Plant Communications 2024年第4期5卷 275-290页

作者： Yan Hao Xin-Feng Wang Yaolin Guo Tian-Yang li Ji Yang Malika lAinouche Armel Salmon Rui-ting Ju Ji-Hua Wu lin-Feng li Bo li National Observations and Research Station for Wetland ecosystems of the Yangtze estuary and Ministry of education Key laboratory for Biodiversity Science and ecological.engineering Institute of Biodiversity Science and Institute of Eco-ChongmingSchool of Life SciencesFudan UniversityShanghai 200438China State Key laboratory of Biocontrol Guangdong Provincial Key Laboratory of Plant ResourcesSchool of Life SciencesSun Yat-sen UniversityGuangzhou 510275China UMR CNRS 6553 Universite´of RennesCampus de Beaulieu35042 Rennes Cedex ParisFrance State Key laboratory of Herbage Improvement and Grassland Agro-ecosystems College of EcologyLanzhou UniversityLanzhou 730000China Ministry of education Key laboratory for Transboundary ecosecurity of Southwest China Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Centre for Invasion BiologyInstitute of BiodiversitySchool of Ecology and Environmental ScienceYunnan UniversityKunmingYunnan 650504China

Invasive al.en species are primary drivers of biodiversity loss and species *** cordgrass(Spartina al.erniflora)is one of the most aggressive invasive plants in coastal.ecosystems around the ***,the genomic bases and evolutionary mechanisms underlying its invasion success have remained largely ***,we assembled a chromosome-level reference genome and performed phenotypic and population genomic analyses between native US and introduced Chinese *** phenotypic comparisons showed that introduced Chinese populations have evol.ed competitive traits,such as earlyflowering time and greater plant biomass,during secondary introductions along China’s *** genomic and transcriptomic inferences revealed distinct evolutionary trajectories of low-and high-latitude Chinese *** particular,genetic mixture among different source populations,together with in-dependent natural selection acting on distinct target genes,may have resul.ed in high genome dynamics of the introduced Chinese *** study provides novel phenotypic and genomic evidence showing how smooth cordgrass rapidly adapts to variable environmental conditions in its introduced ***,candidate genes related toflowering time,fast growth,and stress tolerance(i.e.,salinity and submergence)provide valuable genetic resources for future improvement of cereal crops.

关键词： adaptation natural selection invasive species population genomics Spartina al.erniflora Hao Y. Wang X.-F. Guo Y. li T.-Y. Yang J. Ainouche M.l. Salmon A. Ju R.-T. Wu J.-H. li l.-F. and li B.(2024).Genomic and phenotypic signatures provide insights into the wide adaptation of a global plant invader.

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High critical current density in li_(6.4)la_(3)Zr_(1.4)Ta_(0.6)O_(12) electrolyte via interfacial.engineering with complex hydride

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Rare Metals 2024年第2期43卷 692-701页

作者： Ying-Tong lv Teng-Fei Zhang Zhao-Tong Hu Guang-lin Xia Ze-Ya Huang Zhen-Hua liu li-Hua Que Cai-ting Yuan Fang-Qin Guo Takayuki Ichikawa Xue-Bin Yu Col.ege of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing210016China Centre for Hydrogenergy College of Materials Science and TechnologyNanjing University of Aeronautics and AstronauticsNanjing210016China Department of Materials Science Fudan UniversityShanghai200433China Graduate School of Advanced Science and engineering Hiroshima University1-4-1 KagamiyamaHigashi-Hiroshima739-8527Japan

Garnet-type solid-state batteries(SSBs)are considered to be one of the most promising candidates to realize next-generation lithium metal batteries with high energy density and ***,the dendrite-induced short-circuit and the poor interfacial contact impeded the practical ***,interface engineering to achieve low interfacial resistance without high temperature calcination was developed,which li_(6.4)la_(3)Zr_(1.4)Ta_(0.6)O_(12)(llZTO)was simply coated with complex hydride(li_(4)(BH_(4))_(3)I(3l1l))in various mass ratios n(li_(4)(BH_(4))_(3)I)-(100−n)llZTO(10≤n≤40).The interfacial conductivity increases by more than three orders of magnitude from 8.29×10^(−6)S·cm^(−1)to 1.10×10^(−2)S·cm^(−1).Symmetric li cells exhibit a high critical current density(CCD)of 4.0 mA·cm^(−2) and an excel.ent cycling stability for 200 h at 4.0 mA·cm^(−2).SSBs with polymeric sulfur-polyacrylonitrile(SPAN)cathode achieve a high discharge capacity of 1149 mAh·g^(−1) with a capacity retention of 91%after 100 cycles(0.2 C).This attempt guides a simple yet efficient strategy for obtaining a stable li/llZTO interface,which would promote the development of solid-state batteries.

关键词： Hydrides li_(6.4)la_(3)Zr_(1.4)Ta_(0.6)O_(12)(llZTO) Critical current density Solid-state electrolytes(SSes) lithium-sulfur batteries

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Hl-2A托卡马克偏滤器脱靶时边缘极向旋转和湍流动量输运

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物理学报 2024年第8期73卷 369-376页

作者：龙婷柯锐吴婷高金明才来中王占辉许敏核工业西南物理研究院成都610225

偏滤器脱靶为降低托卡马克靶板热负荷提供了一种有效的解决方案,但脱靶可能引起边界等离子体状态发生变化,影响整体约束性能.本文报道了在中国环流器二号A托卡马克上开展的l模放电偏滤器脱靶时边界等离子体极向旋转和湍流动量输运的实... 详细信息

偏滤器脱靶为降低托卡马克靶板热负荷提供了一种有效的解决方案,但脱靶可能引起边界等离子体状态发生变化,影响整体约束性能.本文报道了在中国环流器二号A托卡马克上开展的l模放电偏滤器脱靶时边界等离子体极向旋转和湍流动量输运的实验研究.采用在偏滤器室注入混合气体(60%氮气+40%氘气)的方式实现了偏滤器脱靶.研究发现,在未脱靶-预脱靶-脱靶过程中,实验测得的近刮削层区域e×B极向流速与湍流动量对极向旋转的驱动作用(雷诺应力)的演化一致;相较于未脱靶状态,脱靶时等离子体边缘极向速度剪切明显降低,导致湍流水平增强.在湍流输运和辐射都增强的共同作用下,等离子体整体约束性能下降.研究表明,边缘湍流输运和等离子体旋转动力学在偏滤器脱靶影响整体约束的芯-边耦合机制中发挥作用.

关键词：核聚变能偏滤器等离子体湍流等离子体流

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基于Nrf2/HO-1信号通路调控的恰玛古多糖抗多柔比星心肌毒性的机制研究

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药学学报 2024年第4期59卷 930-938页

作者：郭君婷赵婷婷叶斯木·塔拉甫别克高瑞娟刘桂花新疆维吾尔自治区药物研究所新疆乌鲁木齐830000 新疆维吾尔药重点实验室新疆乌鲁木齐830000 中国医学科学院医药生物技术研究所北京100050 新疆医科大学药学院新疆乌鲁木齐830011

本研究主要探讨了恰玛古多糖(polysaccharides of Brassica rapa l.,BRPs)对多柔比星(doxorubicin,DOX)心脏毒性的作用及相关机制,研究选用H9c2细胞作为研究对象,采用Cell counting kit-8(CCK-8)法检测BRPs对DOX致H9c2细胞损伤的影响;将H9c2细胞分成对照组、模型组和药物组(0.5~3 mg·ml^(-1)),对照组于正常条件下培养,其余各组在处理后进行1μmol·l^(-1) DOX诱导24 h。通过流式细胞仪检测各组细胞凋亡;分别测定各组细胞乳酸脱氢酶(lactate dehydrogenase,lDH)、细胞内超氧化物歧化酶(superoxide dismutase,SOD)和丙二醛(malondial.ehyde,MDA)的含量;检测细胞内活性氧(ROS)和线粒体膜电位(mitochondrial membrane potential,MMP);Western blot检测凋亡及转录因子NF-e2相关因子(NF-e2-related factor 2,Nrf2)/血红素加氧酶-1(heme oxygenase-1,HO-1)通路相关蛋白表达。与对照组相比,DOX致H9c2细胞损伤的细胞活力下降、凋亡率增加,lDH、MDA水平升高,SOD活性降低,ROS水平显著增多,MMP显著下降;B淋巴细胞瘤-2(B cell lymphoma-2,Bcl-2)蛋白水平降低,Bcl-2关联X蛋白(Bcl associated X protein,Bax)水平显著升高;且模型组Nrf-2、HO-1、醌氧化还原酶1(quinone oxidoreductase 1,NQO1)蛋白表达水平降低,Kelch样环氧氯丙烷相关蛋白1(Kelch-like eCH-associated protein 1,Keap1)和磷酸化p38丝裂原活化蛋白激酶蛋白表达水平显著升高。与模型组相比,BRPs各组在0.5~3 mg·ml^(-1)对DOX致H9c2细胞损伤具有保护作用,降低细胞凋亡及lDH、MDA和细胞内ROS水平,增强SOD活性,升高MMP;同时,BRPs可上调凋亡相关Bcl-2,并下调Bax水平;而且,BRPs可使Nrf2、HO-1、NQO1蛋白表达水平升高,Keap1和磷酸化p38丝裂原活化蛋白激酶水平降低。本研究认为BRPs能够保护H9c2细胞,抑制细胞凋亡,可能与其调节Nrf2/HO-1通路拮抗氧化应激有关。

关键词：恰玛古多糖多柔比星心肌毒性氧化应激 Nrf2/HO-1信号通路

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