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基于MRI的自动化多任务深度学习系统评估冈上肌腱损伤

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国际医学放射学杂志 2024年第4期 499-500页

作者： M.Ni Y.Q.Zhao L.H.Zhang w.chen Q.Z.wang C.Y.Tian 常雪

摘要目的建立一个自动化、多任务、基于MRI的深度学习系统，用于精细评估冈上肌腱（SST）损伤。方法根据关节镜检查结果，将3 087例病人分为SST正常组、退变组和

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Bulk density of mineral and organic soils in the Canada’s arctic and sub-arctic

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Information Processing in Agriculture 2015年第3期2卷 183-190页

作者： M.F.Hossain w.chen Yu Zhang American International University-Bangladesh Kemal Ataturk AvenueH 58/BR 21BananiDhaka 1213Bangladesh Canada Center for Mapping and Earth Observation Natural Resources Canada560 Rochester StreetOttawaON K1S 4M2Canada

Bulk density is an indicator of soil compaction subject to anthropogenic impact,essential to the interpretation of any nutrient budgets,especially to perform carbon *** is so expensive to measure bulk density in arctic/sub-arctic and there are relatively very few field measurements are ***,to establish a bulk density and SOC empirical relationship in Canada’s arctic and sub-arctic ecosystems,compiled all the bulk density and SOC measurements that are available in Northern *** addition an attempt has been made for bulk density and SOC field measurement in Yellowknife and Lupin,to develop an empirical relationship for Canada’s arctic and *** between bulk density(BD)and soil organic carbon(SOC)for mineral soil and organic soils(0–100 cm depth)were described by exponential *** best fit model,predictive bulk density(BDp),for mineral soil,(BDp=0.701+0.952 exp(0.29 SOC),n=702,R2=0.99);for organic soil(BDp=0.074+2.632 exp(0.076 SOC),n=674,R2=0.93).Different soil horizons have different bulk densities and may require different predictive equations,therefore,developed predictive best fit exponential equation for both mineral and organic soils together(BDp=0.071+1.322 exp(0.071 SOC),n=1376,R2=0.984),where X is a dummy variable with a value of 0 for surface peat(0–25 cm depth)and 1 for subsurface peat(25–175 cm).we recommend using the soil organic carbon density approach to estimate BD from SOC because it allows BD to be predicted without significant bias.

关键词： Bulk density Mineral and organic soils Canada’s arctic and sub-arctic

Uncertainty assessment of a polygon database of soil organic carbon for greenhouse gas reporting in Canada’s Arctic and sub-arctic

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Information Processing in Agriculture 2014年第1期1卷 34-41页

作者： M.F.Hossain Yu Zhang w.chen American International University-Bangladesh Kamal Ataturk AvenueBananiDhaka 1213Bangladesh Canada Center for Mapping and Earth Observation Natural Resources Canada560 Rochester StreetOttawaON K1S 4M2Canada

Canada’s Arctic and sub-arctic consist 46%of Canada’s landmass and contain 45%of the total soil organic carbon(SOC).Pronounced climate warming and increasing human disturbances could induce the release of this SOC to the atmosphere as greenhouse *** is committed to estimating and reporting the greenhouse gases emissions and removals induced by land use change in the Arctic and *** assess the uncertainty of the estimate,we compiled a site-measured SOC database for Canada’s north,and used it to compare with a polygon database,that will be used for estimating SOC for the UNFCCC *** 10 polygons where 3 or more measured sites were well located in each polygon,the site-averaged SOC content agreed with the polygon data within±33%for the top 30 cm and within±50%for the top 1 m *** we directly compared the SOC of the 382 measured sites with the polygon mean SOC,there was poor agreement:The relative error was less than 50%at 40%of the sites,and less than 100%at 68%of the *** relative errors were more than 400%at 10%of the *** comparisons indicate that the polygon database is too coarse to represent the SOC conditions for individual *** difference is close to the uncertainty range for *** spatial database could be improved by relating site and polygon SOC data with more easily observable surface features that can be identified and derived from remote sensing imagery.

关键词： Arctic and sub-arctic SOC Uncertainty analysis

Localized space-tim e method of fundamental solutions for three-dimensional transient diffusion problem

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Acta Mechanica Sinica 2020年第5期36卷 1051-1057,I0002页

作者： L.Qiu J.Lin Q.-H.Qin w.chen International Center for Simulation Software in Engineering and Sciences College of Mechanics and MaterialsHohai UniversityNanjing 210098China College of Engineering and Computer Science Australian National UniversityCanberraACT 2601Australia State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures Shijiazhuang Tiedao UniversityShijiazhuang 050043China State Key Laboratory of Acoustic Institute of AcousticsChinese Academy of SciencesBeijing 100190China

A localized space-time method of fundamental solutions(LSTMFS)is extended for solving three-dimensional transient diffusion problems in this *** interval segmentation in temporal direction is developed for the accurate simulation of long-time-dependent diffusion *** the LSTMFS,the whole space-time domain with nodes arranged i divided into a series of overlapping subdomains with a simple *** each subdomain,the conventional method of fundamental solutions is utilized and the coefficients associated with the considered domain can be explicitly *** calculating a combined sparse matrix system,the value at any node inside the space-time domain can be *** experi-ments demonstrate that high accuracy and efficiency can be simultaneously achieved via the LSTMFS,even for the problems defined on a long-time and quite complex computational domain.

关键词： Localized spacetime method of fundamental solutions Meshless method Long-time evolution Transient diffusion

COMPARISON OF MATERIAL FOR ENCAPSULATING MINIMODULES

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Acta Metallurgica Sinica(English Letters) 2005年第3期18卷 380-384页

作者： Z.Zhang H.Shen X.Q.Xu w.chen GuangzhouInstituteofEnergyConversion TheChineseAcademyofSciencesGuangzhou510070China GuangzhouInstituteofEnergyConversion TheChineseAcademyofSciencesGuangzhou510070China／／TheSchoolofPhysicsandEngineeringZhongshanUniversityGuangzhou510640China

The main characteristics of glass, polymethyl methacrylate (PMMA) and polycarbon ate (PC) were presented. The transmittance of glass, PMMA and PC was measured by the UV-VIS spectroscopy analysis. PMMA and PC have the advantages of higher tra nsparency, higher resistance and lower density. It is indicated that both PMMA a nd PC are suitable for encapsulating solar minimodules.

关键词： solar module PMMA PC encapsulate

worldwide impacts of atmospheric vapor pressure deficit on the interannual variability of terrestrial carbon sinks

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National Science Review 2022年第4期9卷 33-40页

作者： Bin He chen chen Shangrong Lin wenping Yuan Hans w.chen Deliang chen Yafeng Zhang Lanlan Guo Xiang Zhao Xuebang Liu Shilong Piao Ziqian Zhong Rui wang Rui Tang State Key Laboratory of Earth Surface Processes and Resource Ecology College of Global Change and Earth System ScienceBeijing Normal University Department of Application Research Twenty First Century Aerospace Technology Co.Ltd. School of Atmospheric Sciences Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)Sun Yat-sen University Department of Physical Geography and Ecosystem Science Lund University Regional Climate Group Department of Earth SciencesUniversity of Gothenburg Academy of Disaster Reduction and Emergency Management School of GeographyBeijing Normal University State Key Laboratory of Remote Sensing Science Faculty of Geographical ScienceBeijing Normal University Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking University

Interannual variability of the terrestrial ecosystem carbon sink is substantially regulated by various environmental variables and highly dominates the interannual variation of atmospheric carbon dioxide(CO2) ***,it is necessary to determine dominating factors affecting the interannual variability of the carbon sink to improve our capability of predicting future terrestrial carbon *** global datasets derived from machine-learning methods and process-based ecosystem models,this study reveals that the inter annual variability of the atmospheric vapor pressure deficit(VPD) was significantly negatively correlated with net ecosystem production(NEP) and substantially impacted the inter annual variability of the atmospheric CO2growth rate(CGR).Further analyses found widespread constraints of VPD interannual variability on terrestrial gross primary production(GPP),causing VPD to impact NEP and *** correlation analysis confirms the persistent and widespread impacts of VPD on terrestrial carbon sinks compared to other environmental *** Earth system models underestimate the interannual variability in VPD and its impacts on GPP and *** results highlight the importance of VPD for terrestrial carbon sinks in assessing ecosystems’ responses to future climate conditions.

关键词： vapor pressure deficit net ecosystem production gross vegetation production carbon dioxide concentration

Deformation kinking and highly localized nanocrystallization in metastableβ-Ti alloys using cold forging

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Journal of Materials Science & Technology 2022年第25期120卷 53-64页

作者： Keer Li w.chen G.X.Yu J.Y.Zhang S.w.Xin J.X.Liu X.X.wang J.Sun State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049China Northwest Institute for Nonferrous Metal Research Xi’an 710016China Baoji Titanium Industry Co. Ltd.Baoji 721014China

Deformation kinking as an uncommon plastic deformation mechanism has been reported in several materials while the relevant microstructure evolution and grain refinement behavior at a large strain remain unclear so *** this study,the issue was systematically investigated by utilizing cold forging to impose severe plastic deformation(SPD)on Ti-11 V metastableβ-Ti *** is found that the formation of kink bands experiences dislocation gliding,pre-kinking and the ripening of pre-kinks in *** kink bands are subsequently thickened through the coalescence of multiple kink bands in a manner of high *** dislocation slip is developed as a dominant deformation mechanism when deformation kinking is *** resulting grain refinement involves transverse breakdown and longitudinal splitting of dislocation walls and cells,which fragment kink bands into smallβ-*** refinement of theβ-blocks is still governed by dislocation activities,and finally nanograins with a diameter of~15 nm are produced at a large strain of ***,it is revealed that nanocrystallization is highly localized inside kink bands while the outer microstructure maintains original coarse *** localized refinement characterization is ascribed to the intrinsic soft nature of kink bands,shown as low hardness in nanoindentation *** intrinsic softening of kink bands is uncovered to originate from the inner degraded dislocation density evidenced by both experimental measurement and theoretical *** findings enrich fundamental understanding of deformation kinking,and shed some light on exploring the deformation accommodation mechanisms for metal materials at large strains.

关键词： Metastableβ-Ti alloys Deformation kinking Microstructural evolution Grain refinement Dislocations

Inhibitory Effects of Bio-Energy Therapies on Cancer Growth——An overview of recent laboratory studies in the *** its implications in cancer treatment

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世界科学技术-中医药现代化 2008年第4期10卷 144-152页

作者： Kevin w.chen Center for Integrative Medicine University of Maryland School of Medicine

Background:Bioenergy therapies(such as Qigong,Reiki,Yoga,Pranic healing,and Therapeutic touch)have reported benefits for cancer patients,but few randomized control trials were done to verify their *** is believed that laboratory study of inhibito- ry effects of bio-energy therapies on cancer growth may lead to an understanding of the true efficacy of bio-energy and create a foun- dation for future clinical ***:Typical in-vitro study involved randomly dividing lab-prepared cancer cells into different groups with one being treated by bio-energy therapy and one or more as control ***,controls were treated by a sham *** in vivo study involved injecting or implanting cancerous cells into mice,then randomly dividing them into various *** control could be either non-treatment or sham treatment;the outcomes include tumor size or survival ***:Most studies demonstrated some inhibitory effects ofbioenergy therapies on the growth of cancer cells in comparison with *** in vivo studies reported that the bio-energy treated group had significantly slower tumor growth or longer survival lives than those in the *** study reported survival with a normal life cycle instead of dying in 3 weeks,and cancer-infected mice developed immune response to the same breast ***,researchers are confronted with methodological challenges in choosing appropriate con- trois,minimizing contamination,and replicating study ***:Encouraging evidence suggests bioenergy may have inhibitory effects on cancer growth,or prolong the life of cancer-infected animals,although improvement is needed in research design and replication of the *** for cancer treatment is an area that is often neglected by mainstream medicine and research, and it should be seriously examined and considered as an important supplement to conventional cancer treatment.

关键词：抑制影响生物疗法癌症治疗方法临床分析

Synergistic Influences of Kinetic Effects from Thermal Particles and Fast Ions on Internal Kink Mode

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Chinese Physics Letters 2021年第8期38卷 67-72页

作者： Yutian Miao G.Z.Hao Yue Liu H.D.He w.chen Y.Q.wang A.K.wang M.Xu Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China Southwestern Institute of Physics Chengdu 610041China

The kinetic effects of thermal particles and fast ions on internal kink(IK)mode are numerically investigated by the MHD-kinetic hybrid code *** is shown that either thermal particles or fast ions have stabilizing influence on ***,the former can not fully stabilize IK,and the later can suppress the *** addition,the synergistic effect from thermal particles and fast ions induces more stronger damping on *** kinetic effects from particles significantly raise the critical value of poloidal beta(βpcrit)for driving IK in the toroidal *** implies a method of controlling IK or sawtooth in the high-βp discharge scenario of *** is noted that,at the q=1 rational surface,mode structure becomes more sharp due to the self-consistent modification by particles’kinetic effect.

关键词： kinetic Internal mode