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separation of the ionospheric and thermospheric contributions in the data from the Triple Ionosophere Photo Meter onboard the Feng-y.n 3E satellite

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science China Earth sciences 2025年第1期68卷 172-184页

作者： Fang JIANg Tian MAO jin-song WANg xiu-Qing HU xiao-xin ZHANg Liping FU Nan JIA Tianfang WANg National space science Center Chinese Academy of Sciences Beijing Key.Laboratory.of space Environment Exploration Key.Laboratory.of Environmental space situation Awareness Technology National satellite Meteorological Center China Meteorological Administration

The Triple Ionosphere Photo Meter （TrIPM） is a far ultraviolet nadir-view photometer that is onboard the secondgeneration,polar-orbiting Chinese meteorological satellite Feng-y.n 3E （Fy.3E）,which was launched on July.5,*** has three channels,and each is used to meas.r. different ty.es of emissions:（1） 135.6 nm airglow produced by.the recombination of the O+ions and electrons in the absence of sunlight （nighttime channel）;（2） 135.6 nm airglow from the OI when sunlight is present （day.ime/dusk-dawn 135.6 nm channel）;and （3） Airglow in the N2LBH of the TrIPM （day.ime/dusk-dawn N2LBH channel）.Fy.3E is a satellite operating in the early.morning ***,the data are mostly.dis.r.buted on the dawndusk side or at times when the solar zenith angle is.r.latively.*** this study.combined with simulation calculations,the data are *** further explore the application value of the data products,a model is used to separate the ionospheric radiative recombination contribution from the thermosphere photoelectron impact excitation contribution in the data from the day.ime/dusk-dawn 135.6 nm *** approach not only.improves the accuracy.of O/N2derived from the 135.6 nm channel and N2LBH channel but also provides the ionospheric 135.6 nm radiance at the same time as the *** results show that the 135.6 nm radiance originating from the combination of O+and electrons extracted from the meas.r.ment data exhibits similar equatorial anomaly.peak s.r.cture characteristics and seasonal variations as the corresponding gPs total electron content （TEC） *** the other hand,the separated 135.6 nm radiance generated from the thermosphere photoelectron collision excitation does not contain radiative recombination contributions;thus,the ionosphere influence is greatly.avoided when the O/N2is obtained.

关键词： Far ultraviolet 135.6 nm emission intensity Photoelectron impact excitation radiative recombination excitation

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Effect of re Addition and Withdrawal rate on the solidification Behavior of Directionally.solidified superalloy.AM3

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Journal of Materials science & Technology 2011年第2期27卷 101-106页

作者： F.Long y.s.y.o s.M.seo T.jin Z.Q.Hu C.y.Jo Institute of Metal research Chinese Academy of SciencesShenyang 110016China High Temperature Materials Laboratory Korea Institute of Materials Sciences66 Sangnam-dongChangwonKyungunamKorea

The influence of re addition and withdrawal rate on the solidification behavior of the first generation single cry.tal superalloy.AM3 was investigated by.directional solidification and quenching *** primary.dendrite arm spacing and eutectic volume fraction were meas.r.d from directionally.solidified superalloy.AM3 with different re *** is found that the primary.dendrite arm spacing is determined by.the withdrawal rate,and re does not influence on the *** eutectic fraction increases with increasing re *** coeffcients of alloy.ng elements were investigated with energy.dispersive x-ray.spectrometry.EDs） *** data was submitted to a statistical treatment to establish the solidification path,and the partition coeficients were meas.r.d by.fitting the curve with a modified scheil *** is shown that the addition of re results in bigger microsegregation of alloy.ng elements in directionally.solidified AM3 superalloy.

关键词： superalloy.AM3 re addation Directional solidification

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Thickness and sp3 bond modulation of（Ti/tetrahedral amorphous carbon）_n multilay.r coatings

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Tungsten 2025年第1期7卷 152-160页

作者： Zhi-Jun xie Jia-Lin Li Ling gong xiang-Li Zhong Hong-Jia song jin-bin Wang National-Provincial Laboratory.of special Function Thin Film Materials School of Materials Science and Engineering Xiangtan University

The durability.of wear-resistant tetrahedral amorphous carbon（ta-C） coatings is intimately.linked to their thickness and the concentration of *** enhance the lifespan of the coatings,we have prepared a multilay.r coating consisting of alternating lay.rs of Ti and ta-C,denoted as（Ti/ta-C）_n,using arc ion plating.A multi-lay.r s.r.cture in conjunction with stage cooling is employ.d to enhance the thickness and promote *** results indicate that the ID/Igvalue,representing the ratio of the intensity.of the D peak to that of the g peak in raman spectroscopy.decreases from 0.85 when no stage cooling is applied to 0.35 when stage cooling is employ.d,suggesting an enhancement in the fraction of sp3bonds within the *** obtained（Ti/ta-C）_n multilay.r coating without peeling off has a maximum thickness of 1.14 μm,which is almost double that of the ta-C coating single lay.r *** the same time,the coating has a low coefficient of friction,down to 0.069,and maintains excellent friction properties with a wear rate of 3.4×10-6mm3·N-1·*** results conclusively.show that the preparation technology.can enhance both thickness and sp3bonding in ta-C coatings,significantly.expanding their utility.across tools,molds,and precision engineering components.

关键词： Arc ion plating Multilay.r s.r.cture sp3 bond Ta-C coating Wear resistance

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Fatigue Properties Improvement of Low-Carbon Alloy.Axle steel by.Induction Hardening and shot Peening:A Prospective Comparison

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Acta Metallurgica sinica(English Letters) 2022年第8期35卷 1343-1356页

作者： g.C.Chu F.Z.Hu x.J.jin y.Zhang Q.Wang J.P.Hou Z.F.Zhang shi-Changxu Innovation Center for Advanced Material Institute of Metal ResearchChinese Academy of SciencesShenyang 110016.China school of Materials science and Engineering University of Science and Technology of ChinaHefei 230026China Manshan Iron and steel Co. Ltd.Maanshan 243000China school of Materials science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Baowu group Masteel rail Transit Materials Technology.Company.Limited Maanshan 243000China

Fatigue fracture is the major threat to the railway.axle, which can be avoided or delay.d by.s.r.ace s.r.ngthening. In this study. a low-carbon alloy.axle steel with two states was treated by.s.r.ace induction hardening and shot peening, respectively. to reveal the mechanism of fatigue property.improvement by.micros.r.cture characterization, microhardness meas.r.ment, residual s.r.ss analy.is, roughness meas.r.ment, and rotary.bending fatigue tests. The results indicate that both quenching and tempering treatment can effectively.improve the fatigue properties of the modified axle steel. In addition, induction hardening can create an ideal hardened lay.r on the sample s.r.ace by.phase transformation from the micros.r.cture of ferrite and pearlite to martensite. By.comparison, shot peening can modify.the micros.r.cture in s.r.ace lay.r by.s.r.ace severe plastic deformation introducing a large number of dislocation and even cause grain refinement. Both induction hardening and shot peening create compressive residual s.r.ss into the s.r.ace lay.r of axle steel sample, which can effectively.reduce the s.r.ss level applied to the metal s.r.ace during the rotary.bending fatigue tests. On the whole, the contribution of induction hardening to the fatigue life of axle steel sample is better than that of the shot peening, and induction hardening shows obvious advantages in improving the fatigue life of axle steel.

关键词： s.r.ace s.r.ngthening Induction hardening shot peening Axle steel Fatigue property.improvement

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Calculating the Wave Force on Partially.Immersed Large-scale Horizontal Cy.inders

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China Ocean Engineering 2021年第2期35卷 291-300页

作者： LIU bi-jin FU Dan-juan school of Civil Engineering and Architecture Xiamen University of TechnologyXiamen 361024China

Large-scale interceptors constitute the main s.r.cture of offshore self-driven floating marine litter collection devices,and the s.r.ctural stability.of such interceptors under the action of waves directly.influences the overall safety.of the *** the ratio of the diameter of a horizontal cy.inder in such interceptors to the incident wavelength is larger than 0.25,the wave force can be calculated by.using the diffraction theory.by.considering the problem as that of the interaction between the waves and a partially.immersed large-scale horizontal *** this study.an analy.ical approach to calculate the wave force on a partially.immersed large-scale horizontal cy.inder was formulated by.using the stepwise approximation *** model tests were conducted to investigate the effects of different factors(wave height,period,and immersion depth)on the wave force on a large-scale horizontal cy.inder under conditions involving short-period *** results show that both horizontal and vertical wave forces on the cy.inder increase as the wave height(immersion depth)increases in most *** vertical wave force decreases with the decrease of the *** the horizontal wave force,it increases with the decrease of the period when the wavelength is larger than the diameter of the cy.inder and decreases with the decrease of the period when the wavelength is smaller than the diameter of the cy.inder.

关键词： wave force large-scale horizontal cy.inder diffraction theory partial immersion stepwise approximation method

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Micros.r.ctural stability.of a single Cry.tal superalloy.DD8 during Thermal Expos.r.

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Journal of Materials science & Technology 2008年第1期24卷 127-130页

作者： K.y.Cheng D.H.Kim y.s.y.o C.y.Jo T.jin Z.Q.Hu superalloy.ivision Institute of Metal Research Chinese Academy of Sciences sheny.ng 110016 China High Temperature Materials group KIMS Changwon Korea Materials Test and Characterization group KIMS Changwon Korea

Micros.r.ctural stability.of a nickel base single cry.tal alloy.DD8 has been *** heat treated specimen showed good micros.r.ctural stability.at 950℃.While under the as-cast condition,a kind of rod-like phase precipitated in the interdendritic region of as-cast specimen during thermal *** phase,which has bcc s.r.cture,was enriched with ***-calc also predicted precipitation of a bcc phase at around 950℃.The Cr-rich bcc phase was considered asα-Cr and formed due to the segregation of Cr under the as-cast condition.

关键词： DD-8 single cry.tal alloy Micros.r.ctural stability Alpha chromium

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First-principles Calculation Assisted Thermody.amic Modeling of Ti-Co-Cu Ternary.sy.tem

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Journal of Materials science & Technology 2010年第4期26卷 317-326页

作者： y.J. y.ng x.M. Tao W.J. Zhu Z.H. Long H.s. Liu Z.P. jin school of Materials science and Engineering Central South University Changsha 410083 China Key.Lab of Non-ferrous Metal science and Engineering Ministry of Education Changsha 410081 China

Thermody.amic assessment of Ti-Co-Cu ternary.sy.tem has been carried out by.combining first-principle calculation and CALPHAD method. Firstly. formation enthalpies of stable and hy.othesized compounds were calculated by.first-principles method. Then, based on reported experimental information, a thermody.amic des.r.ption of the Ti-Co-Cu ternary.sy.tem was performed. solution phases were treated as substitutional solutions of which excess gibbs energies were formulated by.redlich-Kister poly.omial, and the intermediate phases were des.r.bed with sublattice models. All meas.r.d isothermal sections were reasonably.reproduced. In addition, liquidus projection of this ternary.sy.tem was further calculated, which may.be useful for relevant materials processing.

关键词： First-principle CALPHAD Thermody.amic modeling

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study.on the Propagation and Focusing Mechanism of Long Waves over A submerged Atoll

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China Ocean Engineering 2023年第2期37卷 204-217页

作者： FU Dan-juan LIU bi-jin ZHENg jin-hai WANg gang CHEN bi-qin school of Civil Engineering and Architecture Xiamen University of TechnologyXiamen 361024China Hainan Institute Zhejiang UniversitySanya 572025China Key.Laboratory.of Coastal Disaster and Protection Ministry of EducationHohai UniversityNanjing 210098China Fujian Poly.echnic of Information Technology Fuzhou 350003China

An analy.ical solution for long waves propagating over a submerged atoll is established. The atolls involved in this study.are annular coral reefs with large lagoons in the middle, and the expression of the cross section is a trinomial function of the radial distance, i.e., h=ar(2s)-br~s+h_0, where s is the positive rational number. This analy.ical solution extends the theory.by.Wang et al.(2018) as s is no longer limited to s=2/m, where m is the positive integer. In addition, by.adjusting the terrain parameters properly. the analy.ic solution can be degenerated to des.r.be the wave propagation over topography.with a hump or pit. According to the relationship between wave ray. and wave energy. the dis.r.bution characteristics and formation mechanism of energy.over the topography.are expounded. When the lagoon is non-existent, all wave ray. converge at the x-axis, which results in an abrupt amplification of the wave amplitude around the convergence point. When a lagoon is mounted on the top of the atoll, the ray. are scattered due to the refraction of the lagoon, and only.some ray. converge at the sy.metrical axis and the ridges on both sides,which results in the amplification of wave amplitudes in these areas.

关键词： long waves analy.ic solution wave scattering submerged atoll wave propagation

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The Lobster Ey. Imager for As.r.nomy.Onboard the sATech-01 satellite

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research in As.r.nomy.and As.r.phy.ics 2023年第9期23卷 66-78页

作者： Z.x.Ling x.J.sun C.Zhang s.L.sun g.jin s.N.Zhang x.F.Zhang J.B.Chang F.s.Chen y.F.Chen Z.W.Cheng W.Fu y.x.Han H.Li J.F.Li y.Li Z.D.Li P.r.Liu y.H.Lv x.H.Ma y.J.Tang C.B.Wang r.J.xie y.L.xue A.L.y.n Q.Zhang C.y.Bao H.B.Cai H.Q.Cheng C.Z.Cui y.F.Dai D.W.Fan H.B.Hu J.W.Hu M.H.Huang Z.Q.Jia C.C.jin D.y.Li J.Q.Li H.y.Liu M.J.Liu y.Liu H.W.Pan y.L.Qiu M.sugizaki H.sun W.x.Wang y.L.Wang Q.y.Wu x.P.xu y.F.xu H.N.y.ng x.y.ng B.Zhang M.Zhang W.D.Zhang Z.Zhang D.H.Zhao x.Q.Cong B.W.Jiang L.H.Li x.B.Qiu J.N.sun D.T.su J.Wang C.Wu Z.xu x.M.y.ng s.K.Zhang Z.Zhang N.Zhang y.F.Zhu H.y.Ban x.Z.bi Z.M.Cai W.Chen x.Chen y.H.Chen y.Cui x.L.Duan Z.g Feng y.gao J.W.He T.He J.J.Huang F.Li J.s.Li T.J.Li T.T.Li H.Q.Liu L.Liu r.Liu s.Liu N.Meng Q.shi A.T.sun y.M.Wang y.B.Wang H.C.Wu D.x xu y.Q y.ng y.y.ng x.s.y. K.x.Zhang y.L.Zhang y.H.Zhang y.T.Zhang H.Zhou x.C.Zhu J.s.Cheng L.Qin L.Wang Q.L.Wang M.Bai r.L.gao Z.Ji y.r.Liu F.L.Ma y.J.shi J.su y.y.Tan J.Z.Tong H.T.xu C.B.xue g.F.xue W.y.an National As.r.nomical Obs.r.atories Chinese Academy of SciencesBeijing 100101China school of As.r.nomy.and space science University of Chinese Academy of SciencesBeijing 100049China shanghai Institute of Technical Phy.ics Chinese Academy of SciencesShanghai 200083China North Night Vision Technology.Co. LTDNanjing 211106China Institute of High Energy.Phy.ics Chinese Academy of SciencesBeijing 100049China science and Technology.on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy.for Microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National space science Center Chinese Academy of ScienceBeijing 100190China

The Lobster Ey. Imager for As.r.nomy.LEIA),a pathfinder of the Wide-field x-ray.Telescope of the Einstein Probe mission,was successfully.launched onboard the sATech-01 satellite of the Chinese Academy.of sciences on2022 July.*** this paper,we introduce the design and on-ground test results of the LEIA *** stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the x-ray.imager is *** optical assembly.composed of 36 MPO chips is used to focus incident x-ray.photons,and four large-format complementary.metal-oxide semiconductor(CMOs)sens.r.,each of size 6 cm×6 cm,are used as the focal plane *** ins.r.ment has an angular resolution of 4’-8’(in terms of FWHM)for the central focal spot of the point-s.r.ad function,and an effective area of 2-3 cm^(2) at 1 keV in essentially.all the directions within the field of *** detection passband is 0.5-4 keV in soft x-ray. and the sensitivity.is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s *** total weight of LEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 y.,operates in a sun-sy.chronous orbit of 500 km with an orbital period of 95 *** is paving the way.for future missions by.verify.ng in flight the technologies of both novel focusing imaging optics and CMOs sens.r. for x-ray.obs.r.ation,and by.optimizing the working setups of the ins.r.mental *** addition,LEIA is able to carry.out scientific obs.r.ations to find new transients and to monitor known sources in the soft x-ray.band,albeit with limited useful obs.r.ing time available.

关键词： ins.r.mentation detectors-space vehicles ins.r.ments-telescopes-x-ray. genera

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soil salinity.Changes in the Jordan Valley.Potentially.Threaten sustainable Irrigated Agriculture

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Pedosphere 2013年第3期23卷 376-384页

作者： T.g.AMMArI r.TAHHAN s.ABUBAKE y.AL-ZU'bi A.TAHBOUB r.TA'ANy.s.ABU-rOMMAN N.AL-MANAsEEr M.H.sTIETIy. Department of Water resources and Environmental Management Faculty of Agricultural Technology Al-Balqa' Applied University Department of Natural resources and Environment Faculty of Agriculture Jordan University of Science and Technology Department of Plant Production and Protection Faculty of Agricultural Technology Al-Balqa' Applied University Department of biotechnology Faculty of Agricultural Technology Al-Balqa' Applied University Department of Land Water and Environment Faculty of Agriculture University of Jordan

The integrated effect of irrigation and agricultural practices on soil salinity.in the Jordan Valley.（JV）, where over 60% of Jordan＇s agricultural produce is grown, was investigated in this study.during 2009-2010. Due to the differences in agricultural operations, cropping patterns, irrigation management, and weather conditions, 206 top- and sub-soil samples were taken every.1 to 3 km from representative farms along a north-south （N-s） transect with 1 to 2 km lateral extents. soil electrical conductivity.of saturated extract （ECse）, Ca, Mg, K, Na, CI, and Na ads.r.tion ratio （s.r. were determined in saturated paste extracts. results indicated that about 63% of soils in the JV are indeed saline, out of which almost 46% are moderately.to s.r.ngly.saline. Along the N-s transect of the JV, ECse increased from 4.5 to 14.1 ds m-1 in top-soil samples. similar increase was obs.r.ed for the sub-soil samples. The major chemical components of soil salinity. i.e., Ca, Mg, and C1, also showed a similar increase along the N-s transect of the valley. Moreover, compared to previous field sampling, results showed that changes in soil salinity.in the JV were dramatic. In addition, it was found that C1 imposed an existing and potential threat to sensitive crops in 60% of the soils in the JV, where C1 concentrations were greater than 710 mg L-1. Under the prevalent arid Mediterranean conditions, improving the management of .irrigation water, crops, and nutrient inputs and increasing water and fertilizer use efficiencies should be indispensable to cons.r.e and sustain the already.fragile agricultural soils in the JV.

关键词： agricultural practices chloride electrical conductivity irrigation water quality soil salinization

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