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The column density structure of Orion A depicted by N-PDF

Research in Astronomy and Astrophysics 2020年第4期20卷 139-155页

作者： yue-hui ma Hong-Chi Wang Chong Li Ji Yang Purple Mountain Observatory and Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210033China University of Chinese Academy of Sciences Beijing 100049China School of Astronomy and Space Science University of Science and Technology of ChinaAnhui 230026China

We have conducted a large-field simultaneous survey of 12 CO,13 CO and C18O J=1-0 emission toward the Orion A giant molecular cloud(GMC)with a sky coverage of4.4 deg2 using the Purple Mountain Observatory(PMO)-13.7 m millimeter-wavelength *** use the probability distribution function of the column density(N-PDF)to investigate the distribution of molecular hydrogen in the Orion A *** H2 column density,derived from the 13CO emission,of the GMC is dominated by a log-normal distribution in the range from4×1021 to1.5×1023 cm-2 with excesses both at the low-density and high-density *** excess of the low-density end is possibly caused by an extended and low-temperature(10 K)component with velocities in the range of 5-8 km *** with the northern sub-regions,the southern sub-regions of the Orion A GMC contain less gas with column density in NH2>1.25×1022 *** dispersions of the N-PDFs of the sub-regions are found to correlate with the evolutionary stages of the clouds across the Orion A *** structure hierarchy of Orion A GMC is explored with the DENDROGRAM algorithm,and it is found that the GMC is composed of two *** structures except one in the tree have virial parameters less than 2,indicating self-gravity is important on the spatial scales from0.3 to4 *** power-laws and departures from lognormal distributions are found at the high-density end of N-PDFs for active star-forming regions,the N-PDFs of structures in the Orion A GMC are predominantly lognormal on scales from R0.4 to 4 pc.

关键词： ISM:clouds ISM:individual objects(Orion A) ISM:structure stars:formation surveys turbulence

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Effect of low-energy proton on the microstructure, martensitic transformation and mechanical properties of irradiated Ni-rich TiNi alloy thin films

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International Journal of Minerals,Metallurgy and materials 2020年第4期27卷 538-543页

作者： Hai-zhen Wang Yun-dong Zhao yue-hui ma Zhi-yong Gao Science and Technology on materials Performance Evaluation in Space Environment Laboratory School of Materials Science and EngineeringHarbin Institute of TechnologyHarbin 150001China Lanzhou Seemine Sma Co.Ltd. Lanzhou 730010China

Ni–48.5at%Ti thin films were irradiated in the austenite phase by different energy-level protons at a dose rate of 1.85×1012 p/(cm2·s),and the total dose was 2.0×1016 p/*** microstructures of the thin films before and after irradiation were evaluated by transmission electron microscopy(TEM)and grazing-incidence X-ray diffraction(GIXRD),which showed that the volume fraction of Ti3Ni4 phase elevated with proton energy *** influence of proton irradiation on the transformation behavior of the TiNi thin films was investigated by differential scanning calorimetry(DSC).Compared with the unirradiation film,the reverse transformation start temperatures(As)decreased by about 3°C after 120 keV *** proton irradiation also had a significant effect on the mechanical properties of the TiNi thin *** 120 keV energy proton-irradiation,the fracture strength increased by 8.44%,and the critical stress increased by 21.1%.In addition,the nanoindenter measurement image showed that the hardness of the thin films increased with the increase of proton-irradiation *** may be due to the defects caused by irradiation,which strengthen the matrix.

关键词： TiNi thin film proton irradiation microstructure martensitic transformation mechanical properties

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Symmetry properties and widths of the filamentary structures in the Orion A giant molecular cloud

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Research in Astronomy and Astrophysics 2021年第8期21卷 23-45页

作者： Yu-Qing Zheng Hong-Chi Wang yue-hui ma Chong Li Purple Mountain Observatory and Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210033China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China University of Chinese Academy of Sciences Beijing 100049China

We identify 225 filaments from an H2 column density map constructed using simultaneous 12CO,13CO and C18O(J=1-0) observations carried out as a part of the Milky Way Imaging Scroll Painting(MWISP) *** select 46 long filaments with lengths above 1.2 pc to analyze the filament column density *** divide the selected filaments into 397 segments and calculate the column density profiles for each *** symmetries of the profiles are *** proportion of intrinsically asymmetrical segments is 65.3%,and that of intrinsically symmetrical ones is 21.4%.The typical full width at half maximum(FWHM) of the intrinsically symmetrical filament segments is - 0.67 pc with the Plummer-like fitting,and - 0.50 pc with the Gaussian fitting,*** median FWHMs derived from the second-moment method for intrinsically symmetrical and asymmetrical profiles are - 0.44 and 0.46 pc,*** association exists between the filamentary structures and the YSOs in the region.

关键词： ISM:clouds ISM:individual objects(Orion A) ISM:structure stars:formation

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Assessing the performance of molecular gas clump identification algorithms

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Research in Astronomy and Astrophysics 2020年第3期20卷 62-75页

作者： Chong Li Hong-Chi Wang Yuan-Wei Wu yue-hui ma Liang-Hao Lin Purple Mountain Observatory and Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210033China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Precise Positioning and Timing Technology National Time Service CenterChinese Academy of SciencesXi'an 710600China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China

The detection of clumps(cores)in molecular clouds is an important issue in sub-millimetre ***,the completeness of the identification and the accuracy of the returned parameters of the automated clump identification algorithms are still not *** this work,we test the performance and bias of the GaussClumps,ClumpFind,FellWalker,Reinhold,and Dendrograms algorithms in identifying simulated *** designing the simulated clumps with various sizes,peak brightness,and crowdedness,we investigate the characteristics of the algorithms and their *** the aspect of detection completeness,FellWalker,Dendrograms,and GaussClumps are the first,second,and third best algorithms,*** numbers of correct identifications of the six algorithms gradually increase as the size and signal-to-noise ratio(SNRs)of the simulated clumps increase and they decrease as the crowdedness *** the aspect of the accuracy of retrieved parameters,FellWalker and Dendrograms exhibit better performance than the other *** average deviations in clump parameters for all algorithms gradually increase as the size and SNR of clumps *** of the algorithms except FellWalker exhibit significant deviation in extracting the total flux of *** together,FellWalker,GaussClumps,and Dendrograms exhibit the best performance in detection completeness and extracting *** deviation in virial parameter for the six algorithms is relatively *** applying the six algorithms to the clump identification for the Rosette molecular cloud,ClumpFind1994,ClumpFind2006,GaussClumps,FellWalker,and Reinhold exhibit performance that is consistent with the results from the simulated test.

关键词： methods:data analysis methods:numerical ISM:structure

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Molecular Clouds Associated with HⅡRegions and Candidates within l=106°.65 to 109°.50 and b=-1°.85 to 0°.95

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Research in Astronomy and Astrophysics 2022年第4期22卷 71-105页

作者： Chun-Xue Li Hong-Chi Wang yue-hui ma Miao-Miao Zhang Chong Li Yu-Qing Zheng Purple Mountain Observatory and Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210033China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science Nanjing UniversityNanjing 210023China Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University) Ministry of EducationNanjing 210023China

We present a large-scale simultaneous survey of the CO isotopologues(^(12)CO,^(13)CO,and C^(18)O)J=1-0 line emission toward the Galactic plane region of l=106°.65 to 109°.50 and b=-1°.85 to 0°.95 using the Purple Mountain Observatory 13.7 m millimeter-wavelength *** for the molecular gas in the solar neighborhood,the emission from the molecular gas in this region is concentrated in the velocity range of[-60,-35]km s^(-1).The gas in the region can be divided into four clouds,with mass in the range of~10^(3)-10^(4)M☉.We have identified 25 filaments based on the^(13)CO *** median excitation temperature,length,line mass,line width,and virial parameter of the filaments are 10.89 K,8.49 pc,146.11 M☉pc^(-1),1.01 km s^(-1),and 3.14,*** these filaments,eight have virial parameters of less than 2,suggesting that they are gravitationally bound and can lead to star *** HⅡregions or candidates have previously been found in the region and we investigate the relationships between these HⅡregions/candidates and surrounding molecular clouds in *** morphology similarity and radial velocity consistency between HⅡregions/candidates and molecular clouds as evidence for association,and raised temperature and velocity broadening as signatures of interaction,we propose that 12 HⅡregions/candidates are associated with their surrounding molecular *** the case of the HⅡregion of S142,the energy of the HⅡregion is sufficient to maintain the turbulence in the surrounding molecular gas.

关键词： ISM:molecules ISM:clouds ISM:structure (ISM:)HⅡregions

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Deposition and characterization for high-quality Ti-Ni-Cu thin films with higher Cu content

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Rare Metals 2021年第8期40卷 2127-2133页

作者： Jun Li Xiao-Yang Yi Yu Zheng Jing Wang Hai-Zhen Wang Xiang-Long Meng Zhi-Yong Gao yue-hui ma College of Mechanical and Electrical Engineering Northeast Forestry University150001HarbinChina School of materials Science and Engineering Harbin Institute of Technology150001HarbinChina Lanzhou Seemine Sma Co.Ltd 730010LanzhouChina

In order to attain high-quality Ti-Ni-Cu film,the surface morphologies,chemical compositions and mechanical properties of Ti-Ni-Cu thin films prepared by direct current(DC)magnetron sputtering at various processes were characterized by scanning electron microscopy(SEM),X-ray diffractometer(XRD)and tensile *** type of substrates,Ar pressure and sputtering power had significant effects on the quality and chemical composition of Ti-Ni-Cu thin *** with Si and SiO_(2) slides,it was easier to obtain freestanding films by adopting glass or piezoid slide as *** Ti-Ni-Cu thin film deposited at lower pressure(0.10 Pa)had a better *** surface was featured with porous structure in the Ti-Ni-Cu thin film prepared by higher Ar pressure of 0.36 *** addition,both the tensile strength and strain of annealed Ti-Ni-Cu thin film continuously increased with Ar pressure *** density contributed to the superior mechanical *** deposition rate firstly increased and then decreased with Ar pressure and sputtering power *** composition of deposited Ti-Ni-Cu film can be tailored by changing sputter *** deposited Ti-Ni-Cu thin films at different processing parameters were in amorphous *** short,the present study offered the important theoretical basis for the preparation of Ti-Ni-Cu thin film with higher quality and performance.

关键词： Ti-Ni-Cu thin film DC magnetron sputtering Sputtering parameters Chemical composition Surface morphology

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Hypidone hydrochloride(YL-0919)ameliorates functional deficits after traumatic brain injury in mice by activating the sigma-1 receptor for antioxidation

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Neural Regeneration Research 2025年第8期20卷 2325-2336页

作者： Yafan Bai hui ma yue Zhang Jinfeng Li Xiaojuan Hou Yixin Yang Guyan Wang Yunfeng Li Department of Anesthesiology Beijing Tongren HospitalCapital Medical UniversityBeijingChina Beijing Institute of Basic Medical Sciences BeijingChina Hebei North University ZhangjiakouHebei ProvinceChina Beijing Institute of Pharmacology and Toxicology State Key Laboratory of Toxicology and Medical CountermeasuresBeijing Key Laboratory of NeuropsychopharmacologyBeijingChina

Traumatic brain injury involves complex pathophysiological mechanisms,among which oxidative stress significantly contributes to the occurrence of secondary *** this study,we evaluated hypidone hydrochloride(YL-0919),a self-developed antidepressant with selective sigma-1 receptor agonist properties,and its associated mechanisms and targets in traumatic brain *** experiments to assess functional deficits were followed by assessment of neuronal damage through histological analyses and examination of blood-brain barrier permeability and brain ***,we investigated the antioxidative effects of YL-0919 by assessing the levels of traditional markers of oxidative stress in vivo in mice and in vitro in HT22 ***,the targeted action of YL-0919 was verified by employing a sigma-1 receptor antagonist(BD-1047).Our findings demonstrated that YL-0919 markedly improved deficits in motor function and spatial cognition on day 3 post traumatic brain injury,while also decreasing neuronal mortality and reversing blood-brain barrier disruption and brain ***,YL-0919 effectively combated oxidative stress both in vivo and in *** protective effects of YL-0919 were partially inhibited by *** results indicated that YL-0919 relieved impairments in motor and spatial cognition by restraining oxidative stress,a neuroprotective effect that was partially reversed by the sigma-1 receptor antagonist ***-0919 may have potential as a new treatment for traumatic brain injury.

关键词： antidepressant drug blood-brain barrier cognitive function hypidone hydrochloride(YL-0919) neurological function nuclear factor-erythroid 2 related factor 2 oxidative stress sigma-1 receptor superoxide dismutase traumatic brain injury

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Computed Tomography Imaging of Intracerebral Hematoma Anatomy in Hypertensive Intracerebral Hemorrhage

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Journal of Cerebrovascular Disease 2022年第4期5卷 20-24页

作者： Tian-Xiang Zhan Yu-Xiang Weng yue-hui ma Department of Neurosurgery The First Affiliated HospitalZhejiang UniversitySchool of MedicineHangzhou 310003China

Objective:The image data of intracerebral hematoma in hypertensive intracerebral hemorrhage(HICH)patients were obtained by three-dimensional(3D)spiral computed tomography(CT)scan in this study to provide a basis for clinical minimally invasive surgery and the development and research of related surgical ***:From June 2020 to march 2022,33 patients with supratentorial HICH admitted to the Department of Neurosurgery,the First Affiliated Hospital,Zhejiang University,School of Medicine were *** patients underwent 3D spiral CT *** reconstruction(MPR)was used to reconstruct along any plane to obtain coronal,sagittal,cross-sectional,or arbitrary angle reconstructed ***,we observed and measured relevant data indicators on these three planes by measuring ***:All hemorrhage sites of these 33 HICH patients were basal ganglia hemorrhage,including left basal ganglia hemorrhage in 13 cases and right basal ganglia hemorrhage in 20 *** was also found that basal ganglia hematomas were usually elliptical,and the anteroposterior diameter was significantly larger than the transverse diameter,almost twice the size of the transverse diameter[(62±10)mm vs.(35±9)mm,Pmatoma on the transfrontal(sagittal)approach was significantly greater than that on the transtemporal(transverse)approach[(100±15)mm vs.(59±14)mm,Pmatoma on the transfrontal approach was significantly smaller than that on the transtemporal approach[(37±11)°vs.(70±17)°,Pmatoma removal.

关键词： Hypertensive intracerebral hemorrhage Basal ganglia hemorrhage Intracerebral hematoma Computed tomography Multiplanar reconstruction

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Inhibition of the cGAS–STING pathway:contributing to the treatment of cerebral ischemia-reperfusion injury

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Neural Regeneration Research 2025年第7期20卷 1900-1918页

作者： Hang Yang Yulei Xia yue ma Mingtong Gao Shuai Hou Shanshan Xu Yanqiang Wang School of Clinical Medicine Shandong Second Medical UniversityWeifangShandong ProvinceChina Department of Emergency The Affiliated Hospital of Weifang Medical UniversityWeifangShandong ProvinceChina Department of Neurology Ⅱ The Affiliated Hospital of Weifang Medical UniversityWeifangShandong ProvinceChina

The cGAS–STING pathway plays an important role in ischemia-reperfusion injury in the heart,liver,brain,and kidney,but its role and mechanisms in cerebral ischemia-reperfusion injury have not been systematically ***,we outline the components of the cGAS–STING pathway and then analyze its role in autophagy,ferroptosis,cellular pyroptosis,disequilibrium of calcium homeostasis,inflammatory responses,disruption of the blood–brain barrier,microglia transformation,and complement system activation following cerebral ischemia-reperfusion *** further analyze the value of cGAS–STING pathway inhibitors in the treatment of cerebral ischemia-reperfusion injury and conclude that the pathway can regulate cerebral ischemia-reperfusion injury through multiple *** of the cGAS–STING pathway may be helpful in the treatment of cerebral ischemia-reperfusion injury.

关键词： calcium homeostasis cellular autophagy cerebral ischemia-reperfusion injury cGAS–STING pathway ferroptosis gut–brain–microbiota axis inflammatory light chain 3 microglial cells Syntaxin-17 protein

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技术创新向生态创新转换的范式变迁及生态创新多层面协同

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科学技术哲学研究 2018年第2期35卷 58-63页

作者：林慧岳马圣洁长沙理工大学马克思主义学院长沙410005

受制于严峻的环境压力,技术创新必须转型为生态创新。在从设计范式、使用范式、使用后果范式到环境设计范式的序列演变中,范式演变反映了人对其自身能力的反思、人对技术的作用与功效的反思以及人对周遭世界际遇的反思。正是技术范式的... 详细信息

受制于严峻的环境压力,技术创新必须转型为生态创新。在从设计范式、使用范式、使用后果范式到环境设计范式的序列演变中,范式演变反映了人对其自身能力的反思、人对技术的作用与功效的反思以及人对周遭世界际遇的反思。正是技术范式的变迁提供了生态创新转型的驱动力,引导了技术、市场和组织三个层面上的协同创新,以实现经济的可持续性、环境的可持续性与社会的可持续性的统一。

关键词：技术创新生态创新范式变迁多层面协同

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