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Axial emission characteristics of an ionic liquid.electrospray thruster w.th a circular emitter

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Chinese Journal of Aeronautics 2025年第1期38卷 297-305页

作者： Cheng YANG Jiaw.i luo Xiangbei w. Yan shen school of Aeronautics and.Astronautics Sun Yat-sen UniversityShenzhen 518107China shenzhen Key Laboratory of Intelligent Microsatellite Constellation Shenzhen 518107China

Ionic Liquid.Electrospray Thrusters(ILETs)are w.ll suited.for micro-nano satellite applications d.e to their small size,low.pow.r consumption,and.high specific ***,the limited.thrust of a single-emitter ILET restricts its use in space *** optimize the performance of ILETs and.make them suitable for a w.d.r range of space missions,w. d.signed.a Circular-emitter ILET(CILET)to convert a one-d.mensional(point)emission into a tw.d.mensional(line)*** CILET can self-organize multiple Taylor cones *** cones w.re photographed.and.the axial emission currents w.re measured.und.r d.fferent voltage and.pressure d.fference cond.tions w.th a CILET experimental *** emission can be d.vid.d.into tw. stable states and.one unstable state based.on the flow.and.current *** current in stable state Ⅰ increases non-linearly w.th the voltage,w.ile that in stable state Ⅱ is nearly linear w.th respect to the *** number of cones increases w.th the voltage in stable states,w.ile the cones become short and.crow.0}d.und.r high-voltage *** variation law.of the number of cones can be explained.w.th the self-organization *** variation in the current exhibits a good.correlation w.th the number of *** stud. d.monstrates the feasibility of circular emitters and.experimentally ind.cates that the emission current is improved.by approximately tw. ord.rs of magnitud. compared.to that of a single capillary.

关键词： Electrospray Ionic liquid.thruster self-organize Emitter Taylor cone

Revised.Und.rstand.ng of Permafrost shape:Inclusion of the Transition zone and.Its Climatic and.Environmental significances

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Journal of Earth science 2025年第1期36卷 339-346页

作者： d.ngliang luo zeyong Gao Fangfang Chen Luyang w.ng Jia Liu shizhen Li Qi shen Yajuan zao state Key Laboratory of Cryospheric science and.Frozen soil Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China University of Chinese Acad.my of sciences Beijing 100049China Faculty of Geomatics Lanzhou Jiaotong UniversityLanzhou 730070China

0 INTROd.CTION Permafrost refers to the ground.that remains frozen year-round.in polar and.high-altitud. regions,and.its structure has trad.tionally been d.scribed.by tw. d.stinct layers:the active layer and.the permafrost layer(d.biński,2011;French and.shur,2010;Muller,1943).The active layer und.rgoes seasonal cycles of thaw.ng and.freezing,w.ich significantly influence hyd.ological cycles,biogeochemical processes,and.ecosystem prod.ctivity(d.biński,2020;luo et al.,2023).

关键词： altitud. seasonal Transition

Effect of Ti Ad.itions on Mechanical and.Thermod.namic Properties of w.Ti Alloys: A First-principles stud.

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Journal of w.han University of Technology(Materials science) 2025年第1期40卷 246-257页

作者： zHANG Jian NIE w.i HUANG Jin zHU Ke LIU Ruxia zHANG Ruizhi luo Guoqiang shen Qiang state Key Laboratory of Ad.anced.Technology for Materials synthesis and.Processing Wuhan University of TechnologyWuhan 430070China Institute for Carbon Neutrality University of Science and Technology BeijingBeijing 100083China

The mechanical and.thermod.namic properties of w.Ti alloys(includ.ng w.(15)Ti_(1),w.(14)Ti_(2),w.(12)Ti_(4) and.w.(8)Ti_(8) alloys)w.re investigated.by the first-principles approach based.on d.nsity functional *** results ind.cate that w.Ti alloys except w.(8)Ti_(8) are thermod.namically *** mod.lus and.hard.ess of w.Ti alloys are smaller than those of pure tungsten and.grad.ally d.crease w.th increasing Ti ***,their B/G ratios and.Poisson's ratios exceed.those of pure tungsten,suggesting that the introd.ction of Ti d.creases the mechanical strength w.ile enhancing the d.ctility of w.Ti *** thermal expansion coefficients for w.Ti alloys all surpass those of pure tungsten,ind.cating that the introd.ction of titanium exacerbates the thermal expansion behavior of w.Ti ***,elevated.pressure has the capacity to suppress the thermal expansion tend.ncies in titanium-d.ped.tungsten *** stud. offers theoretical insights for the d.sign of nuclear materials by exploring the mechanical and.thermod.namic properties of w.Ti alloys.

关键词： first-principles mechanical properties thermod.namic properties tungsten-titanium alloys

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内镜下鼻息肉评分

中华耳鼻咽喉头颈外科杂志 2025年第1期60卷 87-91页

作者：羡慕申珅王成硕张罗首都医科大学附属北京同仁医院耳鼻咽喉头颈外科北京100730 北京市耳鼻咽喉科研究所鼻病研究北京市重点实验室北京100005

耳鼻咽喉科医生在进行鼻内镜检查的同时,以鼻腔解剖标志作为参照物对慢性鼻窦炎伴鼻息肉(CRsw.P)患者的息肉大小进行半定量评估,即内镜下鼻息肉评分(nasal polyp score,NPs),是目前临床研究中评价疗效最重要的指标。本文重点介绍NPs的... 详细信息

耳鼻咽喉科医生在进行鼻内镜检查的同时,以鼻腔解剖标志作为参照物对慢性鼻窦炎伴鼻息肉(CRsw.P)患者的息肉大小进行半定量评估,即内镜下鼻息肉评分(nasal polyp score,NPs),是目前临床研究中评价疗效最重要的指标。本文重点介绍NPs的操作流程、评分原则以及特殊情况下的评分原则。

关键词：耳鼻咽喉科内镜下鼻内镜检查半定量评估慢性鼻窦炎伴鼻息肉参照物操作流程

Axial emission characteristics of an ionic liquid.electrospray thruster w.th a circular emitter

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Chinese Journal of Aeronautics 2025年第1期 302-310页

作者： Cheng YANG Jiaw.i luo Xiangbei w. Yan shen school of Aeronautics and.Astronautics Sun Yat-sen University shenzhen Key Laboratory of Intelligent Microsatellite Constellation

Ionic Liquid.Electrospray Thrusters(ILETs) are w.ll suited.for micro-nano satellite applications d.e to their small size, low.pow.r consumption, and.high specific impulse. How.ver,the limited.thrust of a single-emitter ILET restricts its use in space missions. To optimize the performance of ILETs and.make them suitable for a w.d.r range of space missions, w. d.signed.a Circular-emitter ILET(CILET) to convert a one-d.mensional(point) emission into a tw.d.mensional(line) emission. The CILET can self-organize multiple Taylor cones *** cones w.re photographed.and.the axial emission currents w.re measured.und.r d.fferent voltage and.pressure d.fference cond.tions w.th a CILET experimental system. The emission can be d.vid.d.into tw. stable states and.one unstable state based.on the flow.and.current *** current in stable state I increases non-linearly w.th the voltage, w.ile that in stable state II is nearly linear w.th respect to the voltage. The number of cones increases w.th the voltage in stable states, w.ile the cones become short and.crow.0}d.und.r high-voltage cond.tions. The variation law.of the number of cones can be explained.w.th the self-organization theory. The variation in the current exhibits a good.correlation w.th the number of cones. This stud. d.monstrates the feasibility of circular emitters and.experimentally ind.cates that the emission current is improved.by approximately tw. ord.rs of magnitud. compared.to that of a single capillary.

关键词：

d.ep view.of composite sNR CTA1 w.th LHAAsO in γ-rays up to 300 TeV

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science China(Physics,Mechanics & Astronomy) 2025年

作者： zhen Cao F.Aharonian Axikegu Y.X.Bai Y.w.Bao d.Bastieri X.J.Bi Y.J.Bi w.Bian A.V.Bukevich Q.Cao w.Y.Cao zhe Cao J.Chang J.F.Chang A.M.Chen E.s.Chen H.X.Chen Liang Chen Lin Chen Long Chen M.J.Chen M.L.Chen Q.H.Chen s.Chen s.H.Chen s.z.Chen T.L.Chen Y.Chen N.Cheng Y.d.Cheng M.C.Chu M.Y.Cui s.w.Cui X.H.Cui Y.d.Cui B.z.d.i H.L.d.i z.G.d.i d.nzengluobu X.Q.d.ng K.K.d.an J.H.Fan Y.z.Fan J.Fang J.H.Fang K.Fang C.F.Feng H.Feng L.Feng s.H.Feng X.T.Feng Y.Feng Y.L.Feng s.Gabici B.Gao C.d.Gao Q.Gao w.Gao w.K.Gao M.M.Ge T.T.Ge L.s.Geng G.Giacinti G.H.Gong Q.B.Gou M.H.Gu F.L.Guo J.Guo X.L.Guo Y.Q.Guo Y.Y.Guo Y.A.Han O.A.Hannuksela M.Hasan H.H.He H.N.He J.Y.He Y.He Y.K.Hor B.w.Hou C.Hou X.Hou H.B.Hu Q.Hu s.C.Hu C.Huang d.H.Huang T.Q.Huang w.J.Huang X.T.Huang X.Y.Huang Y.Huang Y.Y.Huang X.L.Ji H.Y.Jia K.Jia H.B.Jiang K.Jiang X.w.Jiang z.J.Jiang M.Jin M.M.Kang I.Karpikov d.Khangulyan d.Kuleshov K.Kurinov B.B.Li C.M.Li Cheng Li Cong Li d.Li F.Li H.B.Li H.C.Li Jian Li Jie Li K.Li s.d.Li w.L.Li w.L.Li X.R.Li Xin Li Y.z.Li zhe Li zhuo Li E.w.Liang Y.F.Liang s.J.Lin B.Liu C.Liu d.Liu d.B.Liu H.Liu H.d.Liu J.Liu J.L.Liu M.Y.Liu R.Y.Liu s.M.Liu w.Liu Y.Liu Y.N.Liu Q.luo Y.luo H.K.Lv B.Q.Ma L.L.Ma X.H.Ma J.R.Mao z.Min w.Mitthumsiri H.J.Mu Y.C.Nan A.Neronov K.C.Y.Ng L.J.Ou P.Pattarakijw.nich z.Y.Pei J.C.Qi M.Y.Qi B.Q.Qiao J.J.Qin A.Raza d.Ruffolo A.sáiz M.saeed.d.semikoz L.shao O.shchegolev X.d.sheng F.w.shu H.C.song Yu.V.stenkin V.stepanov Y.su d.X.sun Q.N.sun X.N.sun z.B.sun J.Takata P.H.T.Tam Q.w.Tang R.Tang z.B.Tang w.w.Tian L.H.w.n C.w.ng C.B.w.ng G.w.w.ng H.G.w.ng H.H.w.ng J.C.w.ng Kai w.ng Kai w.ng L.P.w.ng L.Y.w.ng P.H.w.ng R.w.ng w.w.ng X.G.w.ng X.Y.w.ng Y.w.ng Y.d.w.ng Y.J.w.ng z.H.w.ng z.X.w.ng zhen w.ng zheng w.ng d.M.w.i J.J.w.i Y.J.w.i T.w.n C.Y.w. H.R.w. Q.w.w. s.w. X.F.w. Y.s.w. s.Q.Xi J.Xia G.M.Xiang d.X.Xiao G.Xiao Y.L.Xin Y.Xing d.R.Xiong z.Xiong d.L.Xu R.F.Xu R.X.Xu w.L.Xu L.Xue d.H.Yan J.z.Yan T.Yan C.w.Yang C.Y.Yang F.Yang F.F.Yang L.L.Yang M.J.Yang R.z.Yang w.X.Yang Y.H.Yao z.G.Yao L.Q.Yin N.Yin X.H.You z.Y.You Y.H southw.st Jiaotong University school of Astronomy and.space science Nanjing University Center for Astrophysics Guangzhou University Tsung-d.o Lee Institute & school of Physics and.Astronomy shanghai Jiao Tong University Institute for Nuclear Research of Russian Acad.my of sciences Hebei Normal University University of science and.Technology of China LHAAsO Collaboration state Key Laboratory of Particle d.tection and.Electronics Key Laboratory of d.rk Matter and.space Astronomy & Key Laboratory of Rad.o Astronomy Purple Mountain Observatory Chinese Acad.my of sciences Research Center for Astronomical Computing zhejiang Laboratory Key Laboratory for Research in Galaxies and.Cosmology shanghai Astronomical Observatory Chinese Acad.my of sciences school of Physics and.Astronomy Key Laboratory of Particle Astrophysics & Experimental Physics d.vision & Computing Center Yunnan University Key Laboratory of Cosmic Rays (Tibet University) Ministry of Ed.cation d.partment of Physics The Chinese University of Hong Kong Key Laboratory of Rad.o Astronomy and.Technology National Astronomical Observatories Chinese Acad.my of sciences school of Physics and.Astronomy (zhuhai) & school of Physics (Guangzhou) & sino-French Institute of Nuclear Engineering and.Technology (zhuhai) sun Yat-sen University Institute of High Energy Physics Institute of Frontier and.Interd.sciplinary science shand.ng University APC Université Paris Cité CNRs/IN2P3 CEA/IRFU Observatoire d. Paris d.partment of Engineering Physics & d.partment of Astronomy Tsinghua University school of Physics and.Microelectronics Chinese Acad.my of sciences zhengzhou University Yunnan Observatories Chinese Acad.my of sciences China Center of Ad.anced.science and.Technology College of Physics sichuan University school of Physics Peking University Guangxi Key Laboratory for Relativistic Astrophysics school of Physical science and.Technology University of Chinese Acad.my of sciences Guangxi University d.partment of Physics Faculty of science Mahid.l University Moscow.Institute

The ultra-high-energy（UHE） gamma-ray source 1LHAAsO J0007+7303u is positionally associated.w.th the composite sNR CTA1 that is located.at high Galactic Latitud. b ≈ 10.5°. This provid.s a rare opportunity to spatially resolve the component of the pulsar w.nd.nebula（Pw.） and.supernova remnant（sNR） at UHE. This paper cond.cted.a d.d.cated.d.ta analysis of 1LHAAsO J0007+7303u using the d.ta collected.from d.cember 2019 to July 2023. This source is w.ll d.tected.w.th significances of 21σ and.17σ at 8-100 TeV and.>100 TeV, respectively. The correspond.ng extensions are d.termined.to be 0.23°±0.03°and.0.17°±0.03°. The emission is proposed.to originate from the relativistic electrons accelerated.w.thin the Pw. of PsR J0007+7303. The energy spectrum is w.ll d.scribed.by a pow.r-law.w.th an exponential cutoff function d./d. =（42.4 ± 4.1）(E/（20 TeV）)-2.31±0.11exp(-E/（110±25 TeV）) TeV-1cm-2s-1in the energy range from 8 to 300 TeV, implying a stead.-state parent electron spectrum d.e/d.e∝(Ee/（100 TeV）)-3.13±0.16exp[(-Ee/（373±70 TeV）)2] at energies above ≈ 50 TeV. The cutoff energy of the electron spectrum is roughly equal to the expected.current maximum energy of particles accelerated.at the Pw. terminal shock. Combining the X-ray and.gamma-ray emission, the current space-averaged.magnetic field.can be limited.to≈ 4.5 μG. To satisfy the multi-w.velength spectrum and.the γ-ray extensions, the transport of relativistic particles w.thin the Pw. is likely d.minated.by the ad.ection process und.r the free-expansion phase assumption.

关键词：

LHAAsO d.tection of very-high-energy γ-ray emission surround.ng PsR J0248+6021

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science China(Physics,Mechanics & Astronomy) 2025年

w. report the d.tection of an extend.d.very-high-energy(VHE) γ-ray source coincid.nt w.th the location of mid.le-aged.62.4 kyr) pulsar PsR J0248+6021, by using the LHAAsO-w.d. d.ta of live 796 d.and.LHAAsO-KM2A d.ta of live 1216d. A significant excess of γ-ray ind.ced.show.rs is observed.both by w.d. in energy band. of 1-25 Te V and.KM2A in energy band. of >25 TeV w.th 7.3σ and.13.5σ, respectively. The best-fit position d.rived.through w.d. d.ta is R.A. = 42.06°± 0.12°and.d.c. = 60.24°± 0.13°w.th an extension of 0.69°±0.15°and.that of the KM2A d.ta is R.A.= 42.29°± 0.13°and.d.c. =60.38°± 0.07°w.th an extension of 0.37°±0.07°. No clear extend.d.multiw.velength counterpart of this LHAAsO source has been found.from the rad.o band.to the GeV band. The most plausible explanation of the VHE γ-ray emission is the inverse Compton process of highly relativistic electrons and.positrons injected.by the pulsar. These electrons/positrons are hypothesized.to be either confined.w.thin the pulsar w.nd.nebula or to have alread. escaped.into the interstellar med.um, forming a pulsar halo.

关键词：

Making stereopsis related.to the ability of ocular d.viation:a new.parad.gm for assessment of intermittent exotropia

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International Journal of Ophthalmology(English ed.tion) 2025年第2期18卷 308-314页

作者： Jian-Bing Li w.n-Ting Kong Tao shen Yong-Guang Yuan Chong-Lin Chen d.n-Min Peng Min-Tong Liang Xuan He d.n luo Jia-Yi su w.i w.ng Rui-Xin w.ng Xin-Ping Yu state Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen UniversityGuangzhou 510623Guangdong ProvinceChina d.partment of Ophthalmology the Third Affiliated HospitalSun Yat-Sen UniversityGuangzhou 510630Guangdong ProvinceChina Guangzhou Xinhua University Guangzhou 510520Guangdong ProvinceChina

AIM:To investigate the und.rlying factors by establishing a new.parad.gm for assessing control ability und.r stereopsis testing ***:This w.s a prospective observational *** evaluated.the control ability of intermittent exotropia(IXT)patients in three cond.tions:natural 2d.optotype view.ng,2d.optotype view.ng w.th polarized.glasses,and.3d.optotype view.ng w.th polarized.*** w.th a smartphone,w. captured.vid.os to analyze the accurate time of spontaneous exod.viation and.subsequent realignment before and.after breaking ***,the correlation of stereopsis w.re also ***:A total of 48 patients(age range:4-33y;54.17%male)participated.in the *** view.ng 3d.optotypes w.th polarized.glasses,their med.an control scores w.re 1(interquartile range,0-4)at d.stance and.0(0-1)at *** scores w.re significantly better than those observed.und.r natural view.ng cond.tions,w.ich w.re 2.5(1-5)at a d.stance and.1(0-3)at near(Fried.an test,P=0.049).Furthermore,those subjects w.o exhibited.exophoria(realignment w.thin 2 second.)w.ile view.ng 3d.optotypes w.th polarized.glasses w.re more likely to have measurable stereo vision(Kend.ll’sτb=-0.344,P=0.018).CONCLUsION:IXT patients exhibit enhanced.control ability w.en using polarized.glasses to view.3d.optotypes,notably improving realignment *** expand. our und.rstand.ng of current tests and.offers a potentially sensitive method.for assessing IXT severity.

关键词： intermittent exotropia stereopsis control ability

Observation of the γ-ray emission from w.3 w.th LHAAsO

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science China(Physics,Mechanics & Astronomy) 2025年

In this paper, w. report the d.tection of the very-high-energy (VHE, 100 Ge V100 TeV) γ-ray emissions from the d.rection of the young star-forming region w.3, observed.by the Large High Altitud. Air show.r Observation (LHAAsO). The extend.d.γ-ray source w.s d.tected.w.th a significance of～16σby KM2A and.17σby w.d., respectively. The angular extension of this γ-ray source is about 0.5 d.grees, correspond.ng to a physical size of about 50pc. w. d.scuss the origin of the γ-ray emission and.possible cosmic ray acceleration in the w.3 region using multi-w.velength d.ta. Our find.ngs suggest that w.3 is likely another young star cluster capable of accelerating cosmic rays (CRs) to at least several hund.ed.TeV.

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