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Towards precision 24-hour movement behavior recommendations—The next new paradigm?

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journal of sport and Health science 2024年第6期13卷 743-748页

作者： Mark s.Tremblay Markus j.Duncan Nicholas Kuzik Diego Augusto santos silva Valerie Carson CHEO Research Institute OttawaON K1H 8L1Canada Department of Pediatrics University of OttawaOttawaON K1H 8L1Canada Federal University of santa Catarina Santa Catarina 88040900Brazil Faculty of Kinesiology Sportand RecreationUniversity of AlbertaEdmontonAB T6G 2H9Canada

*** The importance of physical activity(PA)for health is unequivocal.^(1)Accordingly,population-based recommendations for exercise,and more recently public health guidelines for PA,have been developed and released by authoritative groups for many decades.^(2)such guidelines emerged with leadership from the exercise physiology discipline and were rooted in,and loyal to,the importance of moderate-to-vigorous intensity PA(MVPA)or exercise.

关键词： movement behavior exercise

Atomistic Investigation of shock-Induced Amorphization within Micro-shear bands in Hexagonal Close-Packed Titanium

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Acta Metallurgica sinica(English Letters) 2024年第9期37卷 1590-1600页

作者： Z.C.Meng K.G.wang T.Ali D.Li C.G.bai D.s.Xu s.j.Li A.H.Feng G.j.Cao j.H.Yao Q.b.Fan H.wang R.Yang Institute of Metal Research Chinese Academy of SciencesShenyang 110016China school of Materials science and Engineering University of Science and Technology of ChinaShenyang 110016China Interdisciplinary Centre for Additive Manufacturing(ICAM) School of Materials and ChemistryUniversity of Shanghai for Science and TechnologyShanghai 200093China school of Materials science and Engineering Tongji UniversityShanghai 201804China Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing 210009China National Key Laboratory of science and Technology on Materials Under shock and Impact School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China beijing Institute of Technology Chongqing Innovation Center Chongqing 401135China

The mechanical response of a single crystal titanium sample against(0001)α surface impact was investigated using molecular dynamics ***,non-uniform plastic deformation was observed in the *** high strain rates,amorphization occurred near the edge of the contact region where severe shear strain induced a large number of stacking faults(sFs)and *** contrast,the central part of the contact region underwent less deformation with significantly fewer ***,instead of amorphization by consuming sFs and dislocations,there was a gradual increase in the density of dislocations and sFs during the process of *** local amorphous regions eventually grew into shear bands.

关键词： shock compression Amorphization shear band Titanium Molecular dynamics

Generalized polynomial chaos expansion by reanalysis using static condensation based on substructuring

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Applied Mathematics and Mechanics(English Edition) 2024年第5期45卷 819-836页

作者： D.LEE s.CHANG j.LEE Department of Automotive Engineering Hanyang UniversitySeoul 04763Republic of Korea school of Mechanical Engineering Chungnam National UniversityDaejeon 34134Republic of Korea Department of Mechanical Robotics and Energy EngineeringDongguk UniversitySeoul 04620Republic of Korea

This paper presents a new computational method for forward uncertainty quantification(UQ)analyses on large-scale structural systems in the presence of arbitrary and dependent random *** method consists of a generalized polynomial chaos expansion(GPCE)for statistical moment and reliability analyses associated with the stochastic output and a static reanalysis method to generate the input-output data *** the reanalysis,we employ substructuring for a structure to isolate its local regions that vary due to random *** allows for avoiding repeated computations of invariant substructures while generating the input-output data *** substructuring with static condensation further improves the computational efficiency of the reanalysis without losing ***,the GPCE with the static reanalysis method can achieve significant computational saving,thus mitigating the curse of dimensionality to some degree for UQ under high-dimensional *** numerical results obtained from a simple structure indicate that the proposed method for UQ produces accurate solutions more efficiently than the GPCE using full finite element analyses(FEAs).we also demonstrate the efficiency and scalability of the proposed method by executing UQ for a large-scale wing-box structure under ten-dimensional(all-dependent)random inputs.

关键词： forward uncertainty quantification(UQ) generalized polynomial chaos expansion(GPCE) static reanalysis method static condensation substructuring

一种提高镁合金零部件抗火焰蔓延性的尺寸设计类判据

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Transactions of Nonferrous Metals society of China 2024年第4期34卷 1123-1135页

作者：胡波韩嘉璇李德江李子昕曾小勤丁文江林占宏金晨赵寿上海交通大学材料科学与工程学院轻合金精密成型国家工程研究中心&金属基复合材料国家重点实验室上海200240 青海盐湖特立镁有限公司西宁810000

基于能量守恒定律提出了一种用于预测棒状镁合金样品火焰蔓延时间的判据,该判据表明火焰蔓延时间主要受合金材料和样品尺寸影响。控制体的初始温度和起燃温度以及样品的s/l_c比值(样品横截面面积/横截面周长)是火焰蔓延时间的决定性因... 详细信息

基于能量守恒定律提出了一种用于预测棒状镁合金样品火焰蔓延时间的判据,该判据表明火焰蔓延时间主要受合金材料和样品尺寸影响。控制体的初始温度和起燃温度以及样品的s/l_c比值(样品横截面面积/横截面周长)是火焰蔓延时间的决定性因素。火焰蔓延时间正比于ΔH(将单位质量的样品从初始温度加热到起燃温度所需的能量)和s/l_c比值,这在Mg-8.5Al-0.5Zn-0.2Mn、Mg-2.7Nd-0.4Zn-0.6Zr和Mg-4.0Y-3.3Nd-0.5Zr镁合金中得到验证。对于尺寸相同的样品,Mg-8.5Al-0.5Zn-0.2Mn合金样品有着最大的ΔH以及最长的火焰蔓延时间;对于材质、长度和横截面面积相同的样品,圆形横截面样品的s/lc比值最大,其抗火焰蔓延性能也最佳。

关键词：镁合金零部件抗火焰蔓延性显微组织尺寸设计判据

Physiological and perceptual responses to sprint interval exercise using arm versus leg cycling ergometry

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sports Medicine and Health science 2024年第4期6卷 385-393页

作者： Todd A.Astorino shealin Pierce Madisen b.Piva Richard s.Metcalfe Niels b.j.Vollaard Department of Kinesiology CSU—San MarcosSan MarcosCAUSA Applied sports TechnologyExercise and Medicine(A-STEM)Research CenterSwansea UniversitySwanseaUK Faculty of Health sciences and sport University of StirlingStirlingUK

Increases in power output and maximal oxygen consumption(V_O2max)occur in response to sprint interval exercise(sIE),but common use of“all-out”intensities presents a barrier for many ***,lower-body sIE is not feasible for all *** compared physiological and perceptual responses to supramaximal,but“nonall-out”sIE between leg and arm cycling ***-four active adults(mean±sD age:[25±7]y;cycling VO_(2)max:[39±7]mL·kg^(-1)·min^(-1))performed incremental exercise using leg(LCE)and arm cycle ergometry(ACE)to determine VO_(2)max and maximal work capacity(wmax).subsequently,they performed four 20 s bouts of sIE at 130% wmax on the LCE or ACE at cadence=120-130 rev/min,with 2 min recovery between *** exchange data,heart rate(HR),blood lactate concentration(bLa),rating of perceived exertion(RPE),and affective valence were *** showed significantly lower(pbsolute mean([1.24±0.31]L·min^(-1) vs.[1.59±0.34]L·min^(-1);d=1.08)and peak VO_(2)([1.79±0.48]L·min^(-1) vs.[2.10±0.44]L·min^(-1);d=0.70)with ACE versus ***,ACE elicited significantly higher(ps.[57%±7%]VO_(2)max,d=0.63)and peak VO_(2)([88%±10%]VO_(2)max vs.[75%±10%]VO_(2)max,d?1.33).Post-exercise bLa was significantly higher([7.0±1.7]mM vs.[5.7±1.5]mM,p=0.024,d?0.83)for LCE versus *** was no significant effect of modality on RPE or affective valence(p>0.42),and lowest affective valence recorded(2.0±1.8)was considered“good to fairly good”.Data show that non“all-out”ACE elicits lower absolute but higher relative HR and VO_(2) compared to *** aversive perceptual responses could make this non-all-out modality feasible for inactive adults.

关键词： High intensity interval training Upper body exercise Peak power output Oxygen uptake blood lactate concentration

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基于jACK软件的人工检验台人因工效评价

科技创新与生产力 2024年第5期45卷 113-115,120页

作者：程海迪赵淑苹东北林业大学机电工程学院黑龙江哈尔滨150040

为了提升成品检验台作业人员工作的舒适性,以j公司光伏新能源生产线的成品检验台为研究对象,基于工效学理论,运用jack软件,构建数字人模型,对成品检验操作台进行建模仿真。对于数字人的工作环境进行了舒适度和疲劳度的检验,发现了其中... 详细信息

为了提升成品检验台作业人员工作的舒适性,以j公司光伏新能源生产线的成品检验台为研究对象,基于工效学理论,运用jack软件,构建数字人模型,对成品检验操作台进行建模仿真。对于数字人的工作环境进行了舒适度和疲劳度的检验,发现了其中存在的问题,同时提出了相应的改善措施。数据显示,通过调整工作台布局等方式,数字人的工作舒适度得到显著提升。

关键词：人因工程 jack仿真工效评价作业疲劳

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semi-analytical investigation of heat transfer in a porous convective radiative moving longitudinal fin exposed to magnetic field in the presence of a shape-dependent trihybrid nanofluid

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Applied Mathematics and Mechanics(English Edition) 2024年第1期45卷 197-216页

作者： C.G.PAVITHRA b.j.GIREEsHA M.L.KEERTHI Department of PG studies and Research in Mathematics Kuvempu UniversityShankaraghatta 577451India Department of Mathematics and statistics M.S.Ramaiah University of Applied SciencesBengaluru 560058India

The thermal examination of a non-integer-ordered mobile fin with a magnetism in the presence of a trihybrid nanofluid(Fe_3O_4-Au-Zn-blood) is carried out. Three types of nanoparticles, each having a different shape, are considered. These shapes include spherical(Fe_3O_4), cylindrical(Au), and platelet(Zn) configurations. The combination approach is utilized to evaluate the physical and thermal characteristics of the trihybrid and hybrid nanofluids, excluding the thermal conductivity and dynamic viscosity. These two properties are inferred by means of the interpolation method based on the volume fraction of nanoparticles. The governing equation is transformed into a dimensionless form, and the Adomian decomposition sumudu transform method(ADsTM) is adopted to solve the conundrum of a moving fin immersed in a trihybrid nanofluid. The obtained results agree well with those numerical simulation results, indicating that this research is reliable. The influence of diverse factors on the thermal overview for varying noninteger values of γ is analyzed and presented in graphical representations. Furthermore, the fluctuations in the heat transfer concerning the pertinent parameters are studied. The results show that the heat flux in the presence of the combination of spherical, cylindrical, and platelet nanoparticles is higher than that in the presence of the combination of only spherical and cylindrical nanoparticles. The temperature at the fin tip increases by 0.705 759% when the value of the Peclet number increases by 400%, while decreases by 11.825 13% when the value of the Hartman number increases by 400%.

关键词： convection radiation moving longitudinal fin Adomian decomposition sumudu transform method(ADsTM) trihybrid nanofluid magnetic field

长白山区3种类型天然次生林乔木层物种组成和群落结构特征

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应用与环境生物学报 2024年第4期30卷 743-749页

作者：孙越王清玉刘志宇张忠辉许中旗罗也刘婷张大伟程福山何怀江河北农业大学林学院保定071066 吉林省林业科学研究院长春130013 北华大学林学院吉林132013 吉林省退化森林生态系统恢复与重建跨区域合作科技创新中心长春130013 北京林业大学林学院北京100083

长白山区是中国东北地区生物多样性最丰富的地区之一.为全面系统了解长白山区不同林分类型的物种组成和群落结构,通过卫星网络布点,在长白山地区设置面积为0.1 hm^(2)的样地71块,将全部样地分为阔叶杂木林、针阔混交林和蒙古栎纯林3种林... 详细信息

长白山区是中国东北地区生物多样性最丰富的地区之一.为全面系统了解长白山区不同林分类型的物种组成和群落结构,通过卫星网络布点,在长白山地区设置面积为0.1 hm^(2)的样地71块,将全部样地分为阔叶杂木林、针阔混交林和蒙古栎纯林3种林分.对3种林分内物种区系特征、物种组成、径级结构、重要值和物种多样性等进行计算分析,结果表明长白山地区有48个物种,隶属于13科28属,物种组成丰富.该区域属于以北温带和北温带与南温带间断分布为主的植物区系类型,以紫椴、色木槭、春榆、白桦和蒙古栎为主要树种,重要值均>5;各样地内所有独立个体的径级分布均呈现出倒“j”形分布,表现为典型的异龄林结构,整体林分结构较为稳定.对长白山区3种主要林型物种多样性分析得出,群落整体物种多样性指数较高,shannon-wiener多样性指数为针阔混交林(3.093)>阔叶杂木林(2.861)>蒙古栎纯林(0.502).针阔混交林多样性指数均高于阔叶杂木林和蒙古栎纯林,shannon-wiener多样性指数、simpson多样性指数、Pielou均匀度指数分别为3.093、0.942、0.856,物种最丰富.可见长白山区域森林径阶结构合理,还未演替到稳定的顶极群落状态,物种多样较高,物种丰富.(图4表4参44)

关键词：物种组成群落结构天然次生林长白山区

sTCF conceptual design report (Volume 1): Physics & detector

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Frontiers of physics 2024年第1期19卷 1-154页

作者： M.Achasov X.C.Ai L.P.An R.Aliberti Q.An X.Z.bai Y.bai O.bakina A.barnyakov V.blinov V.bobrovnikov D.bodrov A.bogomyagkov A.bondar I.boyko Z.H.bu F.M.Cai H.Cai j.j.Cao Q.H.Cao X.Cao Z.Cao Q.Chang K.T.Chao D.Y.Chen H.Chen H.X.Chen j.F.Chen K.Chen L.L.Chen P.Chen s.L.Chen s.M.Chen s.Chen s.P.Chen w.Chen X.Chen X.F.Chen X.R.Chen Y.Chen Y.Q.Chen H.Y.Cheng j.Cheng s.Cheng T.G.Cheng j.P.Dai L.Y.Dai X.C.Dai D.Dedovich A.Denig I.Denisenko j.M.Dias D.Z.Ding L.Y.Dong w.H.Dong V.Druzhinin D.s.Du Y.j.Du Z.G.Du L.M.Duan D.Epifanov Y.L.Fan s.s.Fang Z.j.Fang G.Fedotovich C.Q.Feng X.Feng Y.T.Feng j.L.Fu j.Gao Y.N.Gao P.s.Ge C.Q.Geng L.s.Geng A.Gilman L.Gong T.Gong b.Gou w.Gradl j.L.Gu A.Guevara L.C.Gui A.Q.Guo F.K.Guo j.C.Guo j.Guo Y.P.Guo Z.H.Guo A.Guskov K.L.Han L.Han M.Han X.Q.Hao j.b.He s.Q.He X.G.He Y.L.He Z.b.He Z.X.Heng b.L.Hou T.j.Hou Y.R.Hou C.Y.Hu H.M.Hu K.Hu R.j.Hu w.H.Hu X.H.Hu Y.C.Hu j.Hua G.s.Huang j.s.Huang M.Huang Q.Y.Huang w.Q.Huang X.T.Huang X.j.Huang Y.b.Huang Y.s.Huang N.Hüsken V.Ivanov Q.P.ji j.j.jia s.jia Z.K.jia H.b.jiang j.jiang s.Z.jiang j.b.jiao Z.jiao H.j.jing X.L.Kang X.s.Kang b.C.Ke M.Kenzie A.Khoukaz I.Koop E.Kravchenko A.Kuzmin Y.Lei E.Levichev C.H.Li C.Li D.Y.Li F.Li G.Li G.Li H.b.Li H.Li H.N.Li H.j.Li H.L.Li j.M.Li j.Li L.Li L.Li L.Y.Li N.Li P.R.Li R.H.Li s.Li T.Li w.j.Li X.Li X.H.Li X.Q.Li X.H.Li Y.Li Y.Y.Li Z.j.Li H.Liang j.H.Liang Y.T.Liang G.R.Liao L.Z.Liao Y.Liao C.X.Lin D.X.Lin X.s.Lin b.j.Liu C.w.Liu D.Liu F.Liu G.M.Liu H.b.Liu j.Liu j.j.Liu j.b.Liu K.Liu K.Y.Liu K.Liu L.Liu Q.Liu s.b.Liu T.Liu X.Liu Y.w.Liu Y.Liu Y.L.Liu Z.Q.Liu Z.Y.Liu Z.w.Liu I.Logashenko Y.Long C.G.Lu j.X.Lu N.Lu Q.F.Lü Y.Lu Y.Lu Z.Lu P.Lukin F.j.Luo T.Luo X.F.Luo Y.H.Luo H.j.Lyu X.R.Lyu j.P.Ma P.Ma Y.Ma Y.M.Ma F.Maas s.Malde D.Matvienko Z.X.Meng R.Mitchell A.Nefediev Y.Nefedov s.L.Olsen Q.Ouyang P.Pakhlov G.Pakhlova X.Pan Y.Pan E.Passemar Y.P.Pei H.P.Peng L.Peng X.Y.Peng X.j.Peng K.Peters s.Pivovarov E.Pyata b.b.Qi Y.Q.Qi w.b.Qian Y.Qian C.F.Qiao j.j.Qin j.j.Qin L.Q.Qin X.s.Qin T.L.Qiu j.Rademacker C.F.Redmer H.Y.sang Anhui University Hefei 230039China beihang University Beijing 100191China budker Institute of Nuclear Physics Novosibirsk 630090Russia CAs Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing 100190China Cavendish Laboratory University of CambridgeJJ Thomson AveCambridge CB30HEUnited Kingdom Central China Normal University Wuhan 430079China Central south University Changsha 410083China China University of Geosciences Wuhan 430074China China University of Mining and Technology Xuzhou 221116China École Polytechnique Fédérale de Lausanne(EPFL) LausanneSwitzerland Fudan University Shanghai 200433China Goethe University Frankfurt D-60325 Frankfurt am MainGermany Guangxi Normal University Guilin 541004China Guangxi Uninversity Nanning 530004China Hangzhou Institute for Advanced study UCASHangzhou 310024China Hebei Normal University Shijiazhuang 050024China Hebei University Baoding 071002China Hefei University of Technology Hefei 230601China Helmholtz Institute Mainz Staudinger Weg 18D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University Kaifeng 475004China High Energy Physics Center Chung-Ang UniversitySeoul 06974Korea Higher school of Economy 11 Pokrovsky bulvar Moscow 109028Russia Huangshan University Huangshan 245000China Hubei University of Automotive Technology Shiyan 442002China Hunan Normal University Changsha 410081China Hunan University of science and Technology Xiangtan 411201China Hunan University Changsha 410082China Indiana University BloomingtonIndiana 47405USA Inner Mongolia University Hohhot 010021China Institute of Advanced science Facilities Shenzhen 518107China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Institute of Physics Academia SinicaTaipeiTaiwan 11529China Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China jilin University Changch

The superτ-charm facility(sTCF)is an electron–positron collider proposed by the Chinese particle physics *** is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of 0.5×10^(35) cm^(–2)·s^(–1) or *** sTCF will produce a data sample about a factor of 100 larger than that of the presentτ-charm factory—the bEPCII,providing a unique platform for exploring the asymmetry of matter-antimatter(charge-parity violation),in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions,as well as searching for exotic hadrons and physics beyond the standard *** sTCF project in China is under development with an extensive R&D *** document presents the physics opportunities at the sTCF,describes conceptual designs of the sTCF detector system,and discusses future plans for detector R&D and physics case studies.

关键词： electron–positron collider tau-charm region high luminosity sTCF detector conceptual design