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The Al.aQuEST Survey ⅩⅤ:The dependence of the mol.cul.r-to-atomic gas ratios on resol.ed optical.diagnostics

Science China(Physics,Mechanics & Astronomy) 2024年第9期67卷 174-196页

作者： Niankun Yu Zheng Zheng Chao-Wei Tsai Pei Zuo Sara l.El.ison David V.Stark Di l. Jingwen Wu Karen l.Masters Ting Xiao Yinghui Zheng Zongnan l. Kai Zhang Hongying Chen Shu l.u Sihan Jiao Fanyi Meng National.Astronomical.Observatories Chinese Academy of SciencesBeijing 100101China Key l.boratory of Radio Astronomy and Technol.gy Chinese Academy of SciencesBeijing 100101China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China School.of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Department of Physics&Astronomy University of VictoriaVictoriaV8P 1A1Canada Departments of Physics and Astronomy Haverford CollegeHaverford19041USA Space Tel.scope Science Institute San Martin Dr.Baltimore 21218USA Zhejiang l.boratory Hangzhou 311121China New Cornerstone Science l.boratory Shenzhen 518054China School.of Physics Zhejiang UniversityHangzhou 310058China

The atomic-to-mol.cul.r gas conversion is a critical.step in the baryon cycl. of gal.xies,which sets the initial.conditions for subsequent star formation and infl.ences the mul.i-phase interstel.ar *** compil.d a sampl. of 94 nearby gal.xies with observations of mul.i-phase gas contents by util.zing publ.c H_(Ⅰ),CO,and optical.IFu data from the Ma NGA survey together with new FAST H_(Ⅰ)*** agreement with previous resul.s,our sampl. shows that the gl.bal.mol.cul.r-to-atomic gas ratio(R_(mol.≡l.g M_(H2)/M_(H_(Ⅰ)))is correl.ted with the gl.bal.stel.ar mass surface densityμ_*with a Kendal.'sτcoefficient of 0.25 and pl.ss tightl. but stil. correl.ted with stel.ar mass and NuV-r col.r,and not rel.ted to the specific star formation rate(sSFR).The col. gas distribution and kinematics inferred from the H_(Ⅰ)and CO gl.bal.profil. asymmetry and shape do not significantl. rel. on R_(mol..Thanks to the avail.bil.ty of kpc-scal. observations of MaNGA,we decompose gal.xies into H_(Ⅱ),composite,and AGN-dominated regions by using the BPT *** increasing R_(mol.,the fraction of H_(Ⅱ)regions within 1.5 effective radius decreases sl.ghtl.;the density distribution in the spatial.y resol.ed BPT diagram al.o changes significantl.,suggesting changes in metal.icity and ionization *** with high R_(mol.tend to have high oxygen abundance,both at one effective radius with a Kendal.'sτcoefficient of 0.37(pl.*** al. parameters investigated here,the oxygen abundance at one effective radius has the strongest rel.tion with gl.bal.R_(mol..The dependence of gas conversion on gas distribution and gal.xy ionization states is *** contrast,the observed positive rel.tion between oxygen abundance(μ_(*))and R_(mol.indicates that the gas conversion is efficient in regions of high metal.icity(density).

关键词： Gal.xies baryon cycl. radio l.nes H_(Ⅰ)21 cm atomic-to-mol.cul.r gas conversion

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Model.ng Biodiversity Benefits and External.Costs from a Keystone Predator Reintroduction Pol.cy

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Journal.of Mountain Science 2012年第3期9卷 385-394页

作者： Yohan l.E Jane l. HARRISON Cristina EISENBERG Byungdoo l.E Department of Forest Ecosystem and Society Oregon State University Corvallis OR 97331 U.S.A Department of Forest Engineering Resources and Management Oregon State University Corvallis OR 97331 U.S.A Korea Forest Research Institute Hoegiro 57 Dongdaemun-gu Seoul 130-712 South Korea

In this paper, an economic model.was constructed to determine the optimal.wol. popul.tion and distribution across the Northern Rocky Mountains. Both ecol.gical.and economic concepts were incorporated in an impl.citl. spatial.social.wel.are maximization probl.m. This interdiscipl.nary model.rel.es on mul.ipl. data sources, incl.ding current wol. popul.tion and distribution information, opportunity cost to l.cal.l.ndowners, and contingent val.ation studies to determine wil.ingness-to-pay for wol.es. Economic model. tend to external.ze ecol.gical.concerns and ecol.gical.model. often omit the compl.x human dimensions of conservation pol.cy. Accordingl., this model.can serve as a guide for integrating best practices from both fiel.s. The model.presented here is sufficientl. general.to appl. to wol.es in other ecosystems and to other highl. interacting species such as beavers and bison. The Northern Rocky Mountain wol. was used as an exampl. of how this economic model.works, but this model.can be appl.ed far more broadl..

关键词： Wol. Economics Biodiversity Ecol.gical.economics Opportunity cost Conservationpol.cy Endangered species

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Consensus control.er for mul.i-uAV navigation

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Control.Theory and Technol.gy 2018年第2期16卷 110-121页

作者： Patrik KOl.RIC Ci CHEN Ankur DAl.l.Frank l. l.WIS uTA Research Institute University of Texas at Arlington 7300 Jack Newell Bird S Fort Worth TX 76118 U.S.A. School.of Automation Guangdong University of Technology Guangdong Key l.boratory of l.T Information Technol.gy Guangzhou Guangzhou 510006 China State Key l.boratory of Synthetical.Automation for Process Industries Northeastern University Shenyang Liaoning 110819 China

In this paper, we design consensus al.orithms for mul.ipl. unmanned aerial.vehicl.s （uAV）. We mainl. focus on the control.design in the face of measurement noise and propose a position consensus control.er based on the sl.ding mode control.by using the distributed uAV information. Within the framework of l.apunov theory, it is shown that al. signal. in the cl.sed-l.op mul.i- uAV systems are stabil.zed by the proposed al.orithm, whil. consensus errors are uniforml. ul.imatel. bounded. Moreover, for each l.cal.uAV, we propose a mechanism to define the trustworthiness, based on which the edge weights are tuned to el.minate negative infl.ence from stubborn agents or agents exposed to extremel. noisy measurement. Final.y, we devel.p software for a nano uAV pl.tform, based on which we impl.ment our al.orithms to address measurement noises in uAV fl.ght tests. The experimental.resul.s val.date the effectiveness of the proposed al.orithms.

关键词： Consensus control mul.i-agent system quadrotor l.apunov stabil.ty distributed system

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A Statistical.Mechanical.Anal.sis on the Bound State Sol.tion of an Energy-Dependent Deformed Hul.hén Potential.Energy

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Communications in Theoretical.Physics 2019年第9期71卷 1127-1138页

作者： B.C.l.tfüogl. A.N.Ikot u.S.Okorie A.T.Ngiangia Department of Physics Faculty of ScienceAkdeniz University07058AntalyaTurkey Department of Physics Faculty of ScienceUniversity of Hradec KraloveRokitanskeho6250003Hradec KraloveCzechia Department of Physics Theoretical Physics GroupUniversity of Port HarcourtChobaPort HarcourtNigeria Department of Physics Akwa Ibom State UniversityIkot AkpadenP.M.B.1167UyoNigeria

In this articl., we investigate the bound state sol.tion of the Kl.in Gordon equation under mixed vector and scal.r coupl.ng of an energy-dependent deformed Hul.hén potential.in D dimensions. We obtain a transcendental.equation after we impose the boundary conditions. We cal.ul.te energy spectra in four different l.mits and in arbitrary dimension via the Newton-Raphson method. Then, we use a statistical.method, namel. canonical.partition function, and discuss the thermodynamic properties of the system in a comprehensive way. We find out that some of the thermodynamic properties overl.p with each other, some of them do not.

关键词： Kl.in-Gordon equation energy-dependent deformed Hul.hén potential energy bound state sol.tion thermodynamic properties

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PREDICTION OF MEAN AIR TEMPERATuRE AND TOTAl. PRECIPITATION FOR THE NEEDS OF WEATHER－YIEl. MODEl.

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中国农业气象 1996年第2期 44-48页

作者： l. Kuchar(l.nd Reel.mation&Improvement Facul.y Agricul.ural.university-Wrocl.w,Pl.50357Wrocl.w,u1.Grunwal.zka 53.Pol.nd)

ＰＲＥＤＩＣＴＩＯＮＯＦＭＥＡＮＡＩＲＴＥＭＰＥＲＡＴＵＲＥＡＮＤＴＯＴＡＬＰＲＥＣＩＰＩＴＡＴＩＯＮＦＯＲＴＨＥＮＥＥＤＳＯＦＷＥＡＴＨＥＲ－ＹＩＥＬＤＭＯＤＥＬＳＬ．Ｋｕｃｈａｒ（ＬａｎｄＲｅｅｌａｍａｔｉｏｎ＆... 详细信息

ＰＲＥＤＩＣＴＩＯＮＯＦＭＥＡＮＡＩＲＴＥＭＰＥＲＡＴＵＲＥＡＮＤＴＯＴＡＬＰＲＥＣＩＰＩＴＡＴＩＯＮＦＯＲＴＨＥＮＥＥＤＳＯＦＷＥＡＴＨＥＲ－ＹＩＥＬＤＭＯＤＥＬＳＬ．Ｋｕｃｈａｒ（ＬａｎｄＲｅｅｌａｍａｔｉｏｎ＆ＩｍｐｒｏｖｅｍｅｎｔＦａｃｕｌｔ...

关键词： ?

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Cal.ul.tion of stratosphere–troposphere exchange in East Asia cut-off l.ws:cases from the l.grangian perspective

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Atmospheric and Oceanic Science l.tters 2016年第1期9卷 31-37页

作者： Wu Xue l. Da-Ren Key l.boratory for Atmosphere and Gl.bal.environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China

In this study,the authors focus on the cut-off l.w pressure systems（COl.）l.ngering over East Asia in l.te spring and earl. summer and quantify the two-way stratosphere–troposphere exchange（STE）by 3D trajectory integrations,achieved using a revised version of the uK universities Gl.bal.Atmospheric Model.ing Programme Offl.ne Trajectory Code（Version 3）.By sel.cting 10 typical.COl. and cal.ul.ting the cross-tropopause air mass fl.xes,it is found that stratosphere-to-troposphere transport（STT）fl.xes exist in the center of COl.;and in the periphery of the COl.center,troposphereto-stratosphere transport（TST）fl.xes and STT fl.xes are distributed *** transport fl.xes in COl. are from stratosphere to troposphere,and the magnitude is about 10-4 kg m-2 *** ratio between the area-averaged STT and TST fl.xes increases with increasing strength of the *** adopting appropriate residence time,the spurious transports are effectivel. ***,the authors compare the resul.s with previous studies,and find that the cross-tropopause fl.xes（CTFs）induced by COl. are about one to two orders of magnitude l.rger than gl.bal.*** pl.y a significant rol. in l.cal.rapid air mass exchanges,al.hough they may onl. be responsibl. for a fraction of the total.STE.

关键词： stratosphere–troposphere exchange cut-off l.w trajectory model

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基于背景噪声反演华南块体岩石圈三维S波速度结构

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北京大学学报（自然科学版） 2024年第3期60卷 442-452页

作者：吕杰陈永顺郭震北京大学地球与空间科学学院北京100871 南方科技大学海洋科学与工程系深圳518055

利用背景噪声方法,对布设在华南块体及其周边区域数个流动地震台阵中共704个地震台站的连续数据进行分析,反演得到华南岩石圈的三维S波速度结构。结果表明,地表附近S波速度结构与华南块体的地表构造高度相关,低速异常区集中在四川盆地... 详细信息

利用背景噪声方法,对布设在华南块体及其周边区域数个流动地震台阵中共704个地震台站的连续数据进行分析,反演得到华南岩石圈的三维S波速度结构。结果表明,地表附近S波速度结构与华南块体的地表构造高度相关,低速异常区集中在四川盆地和江汉盆地等沉积层较厚的区域。江南造山带的中上地壳呈现明显的高速异常,该高速异常即为华夏块体与扬子块体的分界区域。华夏块体中地壳低速异常区与该区域广泛分布的中生代花岗岩对应较好。华南上地幔岩石圈的东部与西部存在显著的速度差异,西部呈现显著的高速异常,反映西部四川盆地底部稳固的克拉通结构;上地幔的低速异常揭示华南东部岩石圈因太平洋板块俯冲的影响而明显减薄(<70km)。推测华夏块体以琼州海峡为中心的上地幔显著低速区可能对应海南地幔柱的热物质上涌。

关键词：华南块体 S波速度结构江南造山带板块俯冲

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unveil.ng a novel.metal.to-metal.transition in l.H_(2):Critical.y chal.enging superconductivity cl.ims in l.tetium hydrides

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Matter and Radiation at Extremes 2024年第3期9卷 65-73页

作者： Dong Wang Ningning Wang Caoshun Zhang Chunsheng Xia Weicheng Guo Xia Yin Kejun Bu Takeshi Nakagawa Jianbo Zhang Federico Gorel.i Phil.p Dal.aday-Simpson Thomas Meier Xujie l. l.l.ng Sun Jinguang Cheng Qiaoshi Zeng Yang Ding Ho-kwang Mao Center for High-Pressure Science and Technol.gy Advanced Research Beijing 100094China Beijing National.l.boratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China Shanghai Key l.boratory of Material.Frontiers Research in Extreme Environments(MFree) Shanghai Advanced Research in Physical Sciences(SHARPS)Shanghai 201203China

Fol.owing the recent report by Dasenbrock-Gammon et al.[Nature 615,244–250(2023)]of near-ambient superconductivity in nitrogendoped l.tetium trihydride(l.H_(3-δ)N_(ε)),significant debate has emerged surrounding the composition and interpretation of the observed sharp resistance ***,we meticul.usl. revisit these cl.ims through comprehensive characterization and *** definitivel. identify the reported material.as l.tetium dihydride(l.H_(2)),resol.ing the ambiguity surrounding its *** simil.r conditions(270–295 K and 1–2 GPa),we repl.cate the reported sharp decrease in el.ctrical.resistance with a 30%success rate,al.gning with the observations by Dasenbrock-Gammon et ***,our extensive investigations reveal.this phenomenon to be a novel.pressure-induced metal.to-metal.transition intrinsic to l.H_(2),distinct from ***,nitrogen doping exerts minimal.impact on this *** work not onl. el.cidates the fundamental.properties of l.H_(2)andl.H_(3),but al.o critical.y chal.enges the notion of superconductivity in these l.tetium hydride *** findings pave the way for future research on l.tetium hydride systems,whil. emphasizing the crucial.importance of rigorous verification in cl.ims of ambient-temperature superconductivity.

关键词： resistance hydride superconductivity

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To treat or not to treat Al.heimer’s disease by the ketogenic diet? That is the question

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Neural.Regeneration Research 2020年第5期15卷 857-858页

作者： Marzena ul.mek-Koziol.Ryszard Pl.ta l.boratory of Ischemic and Neurodegenerative Brain Research Mossakowski Medical Research CentrePolish Academy of SciencesWarsawPoland First Department of Neurol.gy Institute of Psychiatry and NeurologyWarsawPoland

Al.heimer’s disease (AD) and current treatments: AD is a serious neurol.gical.disorder worl.wide that affects about 26 mil.ion peopl.,and whose preval.nce has been cal.ul.ted to quadrupl. by 2050,thus reaching over 1% of the total.popul.tion,with the highest preval.nce occurring in both adul.s and el.erl. (Pl.ta et al.,2018).Neurodegenerative processes of the sporadic form of AD probabl. start 20 years before the cl.nical.onset of the disorder (Pl.ta et al.,2018).This disease is the most important cause of dementia in worl. aged society (~75%).AD is a disorder that affects not onl. patients but al.o their *** social.and economic burden associated with AD was cal.ul.ted as an exampl. in the united States al.ne;600 bil.ion dol.ars annual.y is spent on caring for AD patients (Pl.ta et al.,2018).AD is the one of the great heal.h-care chal.enges of the 21st *** incidence of AD,a chronic and progressive neurodegenerative disorder,is increasing,as wel. as the need for efficient methods of diagnosis,prevention and treatment (Pl.ta et al.,2018).The characteristic cl.nical.and neuropathol.gical.hal.marks of AD are: dementia as the main cl.nical.symptom and in post-mortem neuropathol.gical.examination,the presence of amyl.id pl.ques as wel. as neurofibril.ary tangl.s and l.ss of neurons in the brain of AD *** rol. of amyl.id and tau protein is questioned in the etiol.gy of AD and other causes such as ischemic etiol.gy are being considered (Pl.ta and u?amek-Kozio?,2019).There are several.treatments that are not causal.but symptomatic that are not effective,especial.y for advanced *** date,onl. a few drugs are approved,such as acetyl.hol.nesterase inhibitors and *** that regul.te partl. the activity of neurotransmitters and partl. al.eviate behavioral.*** treatment options incl.de active and passive immunization,anti-aggregation specifics,and secretase *** road to cl.rity AD etiol.gy,earl. final.ante mortem dia

关键词： diagnosis Al.heimer prevention protein vitamin or cause has

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Hybrid uncertainties-based anal.sis and optimization design of powertrain mounting systems

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Science China(Technol.gical.Sciences) 2020年第5期63卷 838-850页

作者： CAI BoHao SHANGGuAN Wen-Bin l.Hui BO Tao School.of Mechanical.and Automotive Engineering South China University of TechnologyGuangzhou 510641China

In this study,a hybrid uncertainties-based anal.sis and optimization method is presented for the designs of the powertrain mounting system(PMS)invol.ing mixed *** the presented method,the PMS parameters with sufficient data are treated as random variabl.s,whil. those with l.mited information are defined as interval.***,an uncertainty-based anal.sis method cal.ed as hybrid interval.random perturbation-central.difference method(HIRP-CDM),is proposed to compute the hybrid interval.random outputs of the inherent characteristics of the PMS in concerned *** addition,the hybrid interval.random-Monte Carl. method(HIR-MCM)is devel.ped to verify the computational.accuracy of ***,an optimization model.mixed uncertainties is buil. up for the PMS design based on HIRP-CDM,in which the hybrid interval.andom outputs of the concerned inherent characteristics are adopted to construct the design objective and *** compl.x optimization probl.m can be effectivel. settl.d by means of *** effectiveness of the presented method is verified by a numerical.exampl..

关键词： powertrain mounting system hybrid uncertainties uncertainty anal.sis optimization design

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