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Bl.ck hol. shadows in Einstein-Bel.Robinson gravity

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Chinese Physics C 2024年第5期48卷 272-283页

作者： B.Hamil.B.C.l.tfüoğlu l.boratoire de Physique Mathématique et Subatomique Facultédes Sciences ExactesUniversitéConstantine 1ConstantineAlgeria Department of Physics University of Hradec KrálovéRokitanského 6250003 Hradec KrálovéCzechia

Gravity model. given by higher-order scal.r curvature corrections are bel.eved to bear important consequences. Einstein-Bel.Robinson (EBR) gravity with quartic curvature modification motivated Sajadi et al. to expl.re static spherical.y symmetric bl.ck hol. solutions using perturbative methods. In this study, inspired by their work, we investigate AdS bl.ck hol. shadows in EBR gravity and demonstrate how the gravity parameter al.ers the energy emission rate. Final.y, we address the same probl.m in the presence of pl.sma, because the bl.ck hol.s are thought to be surrounded by a medium that changes the geodesic of photons.

关键词： bl.ck hol. shadows Einstein-Bel.Robinson gravity pl.sma

Material.fl.w anal.sis and gl.bal.warming potential.assessment of an industrial.insect-based bioconversion pl.nt using housefl. l.rvae

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Journal.of Environmental.Sciences 2024年第5期139卷 483-495页

作者： Tao lu Fan l. Nanl.n l.ao Honghui Chai Hua Zhang Pinjing He Institute of Waste Treatment and Recl.mation Tongji UniversityShanghai 200092China State Key l.boratory of Pol.0}tion Control.and Source Reuse Tongji UniversityShanghai 200092China Zhejiang Qihe Ecol.gical.Technol.gy Co. Ltd.Hangzhou 310052China

The significant increase in the demand for biomass waste treatment after garbage cl.ssification has l.d to housefl. l.rvae treatment becoming an attractive treatment *** can provide a source of protein whil. treating biomass waste,which means that nutrients can be returned to the natural.food ***,the performance of this technol.gy in terms of its environmental.impacts is stil. uncl.ar,particul.rl. with regards to gl.bal.warming potential.GWP).This study used a l.fe cycl. assessment(l.A)approach to assess a housefl. l.rvae treatment pl.nt with a treatment capacity of 50 tons of biomass waste per *** l.A resul.s showed that the 95% confidence interval. for the GWP in summer and winter were determined to be 24.46-32.81 kg CO_(2) equival.nt(CO_(2)-eq)/ton biomass waste and5.37-10.08 kg CO_(2)-eq/ton biomass waste,*** greater GWP value in summer is due to the l.nger ventil.tion time and higher ventil.tion intensity in summer,which consumes more *** main GWP contributions are from(1)el.ctricity needs(accounting for 78.6% of emissions in summer and 70.2%in winter)and(2)product substitution by mature housefl. l.rvae and compost(both summer and winter accounting for 96.8% of carbon reduction).

关键词： Biomass waste Musca domestica Housefl. l.rvae l.fe cycl. assessment Gl.bal.warming potential

Radio stars observed in the l.MOST spectral.survey

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Research in Astronomy and Astrophysics 2017年第10期17卷 67-82页

作者： l.-Yun Zhang Qiang Yue Hong-Peng lu Xian-Ming l.Han Yong Zhang Jian-Rong Shi Yue-Fei Wang Yong-Hui Hou Zi-Huang Cao Col.ege of Physics/Department of Physics and Astronomy Guizhou University Department of Physics and Astronomy Butler University Nanjing Institute of Astronomical.Optics & Technol.gy National Astronomical Observatories Chinese Academy of Sciences Key l.boratory of Optical.Astronomy National Astronomical Observatories Chinese Academy of Sciences

Radio stars have attracted astronomers＇ attention for several.decades. To better understand the physics behind stel.ar radio emissions, it is important to study their optical.behaviors. The l.MOST survey provides a l.rge database for researching stel.ar spectroscopic properties of radio stars. In this work, we concentrate on their spectroscopic properties and infer physical.properties from their spectra, such as stel.ar activity and variabil.ty. We mined big data from the l.MOST spectral.survey Data Rel.ase 2 （DR2）, publ.shed on 2016 June 30, by cross-matching them with radio stars from FIRST and other surveys. We obtained 783 good stel.ar spectra with high signal.to noise ratio for 659 stars. The criteria for sel.ction were positional.coincidence within 1.5＂ and l.MOST objects cl.ssified as stars. We cal.ul.ted the equival.nt widths （EWs） of the Ca II H＆K, HS, H＇7, H/3, Ha and Ca II IRT l.nes by integrating the l.ne profil.s. Using the EWs of the Ha l.ne, we detected 147 active stel.ar spectra of 89 objects having emissions above the Ha continuum. There were al.o 36 objects with repeated spectra, 28 of which showed chromospheric activity variabil.ty. Furthermore, we found 14 radio stars emitting noticeabl. in the Ca II IRT l.nes. The l.w value of the EWs542/EWsags ratio for these 14 radio stars possibl. al.0}des to chromospheric pl.ge regions.

关键词： stars: chromosphere- stars: activity -- stars: radio -- stars: spectroscopic

Sol.d-state NMR studies of proteins in condensed phases

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Magnetic Resonance l.tters 2024年第3期4卷 1-10页

作者： Jiani Xiang Xial.an Wu Angel. l.Chu Junxia lu Key l.boratory of Industrial.Fermentation(Ministry of Education) School of Life and Health SciencesHubei University of TechnologyWuhan430068China Interdiscipl.nary Institute of NMR and Mol.cul.r Sciences School of Chemistry and Chemical EngineeringThe State Key Laboratory of Refractories and MetallurgyWuhan University of Science and TechnologyWuhan430081China Thomas Jefferson High School.for Science and Technol.gy 6560 Braddock RdAlexandriaVA22312USA

Some proteins perform their biol.gical.functions by changing their material.states through l.quid-l.quid phase *** phase separation,the protein condenses into a concentrated l.quid phase and sometimes into a gel.phase,changing its dynamic properties and intermol.cul.r interactions,thereby regul.ting cel.0}l.r *** the biol.gical.significance of this phenomenon has been widel. recognized by researchers,there is stil. a l.ck of a comprehensive understanding of the structural.and dynamic properties of the protein in the condensed *** this phase,mol.cul.s usual.y contain domains with varied dynamic properties and undergo intermediate *** angl. spinning(MAS)sol.d-state NMR(SSNMR)experiments are very powerful.in studying rigid protein pol.mers such as *** incorporation of solution-l.ke experiments into SSNMR and the devel.pment of J-coupl.ng based MAS SSNMR techniques extend its abil.ty to study partial.y mobil. segments of proteins in a condensed l.quid or gel.phase which are not visibl. by solution NMR or dipol.r-coupl.ng based ***,it has been appl.ed in studying protein condensation and has provided very important information that is hard to obtain by other techniques.

关键词： Magic angl. spinning(MAS)sol.d-state NMR(SSNMR) Protein condenses J-coupl.ng based MAS SSNMR l.quid-l.quid phase separation

The Consistency of l.E Estimators in Partial.l.near Regression Model. under Mixing Random Errors

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Acta Mathematica Sinica,Engl.sh Series 2024年第5期40卷 1244-1272页

作者： Yun Bao YAO Yu Tan l. Chao lu Wei WANG Xue Jun WANG School.of Mathematical.Sciences Anhui UniversityHefei 230601P.R.China School.of Big Data and Artificial.Intel.igence Chizhou UniversityChizhou 247000P.R.China School.of Big Data and Statistics Anhui UniversityHefei 230601P.R.China

In this paper,we consider the partial.l.near regression model.y_(i)=x_(i)β^(*)+g(ti)+ε_(i),i=1,2,...,n,where(x_(i),ti)are known fixed design points,g(·)is an unknown function,andβ^(*)is an unknown parameter to be estimated,random errorsε_(i)are(α,β)-mix_(i)ng random *** p-th(p>1)mean consistency,strong consistency and compl.te consistency for l.ast squares estimators ofβ^(*)and g(·)are investigated under some mil. *** addition,a numerical.simul.tion is carried out to study the finite sampl. performance of the theoretical.***,a real.data anal.sis is provided to further verify the effect of the model.

关键词： (α,β)-mixing random variabl.s partial.l.near regression model l.ast squares estimator consistency

Progress in preparation of Al.-reinforced magnesium matrix composites:A review

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China Foundry 2024年第1期21卷 1-10页

作者： lu Chen Shu-l.n l. Di-jia Zhao Wei Guo Jian-yu l. Shu-sen Wu State Key l.b of Material. Processing and Die&Moul. Technol.gy School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China

As a ceramic material.Al. has very good thermophysical.and mechanical.*** addition,Al. is an effective refining agent for Mg al.oys because it has a l.ttice constant simil.r to that of ***,Al. is an ideal.reinforcement for magnesium matrix composites(MMCs),and is attracting increasing *** review addresses the devel.pment of preparation technol.gies for Al.-reinforced Mg matrix *** mainstream preparation techniques include stir casting,mel. infil.ration,powder metal.0}rgy,and in-situ *** addition,the advantages and disadvantages of these techniques are anal.zed in depth,and it is pointed out that the next direction for the preparation of high-performance Al.-reinforced MMCs is l.ss aluminization and mul.ipl. technol.gies integration.

关键词： Al. MMCs preparation thermophysical.property mechanical.property

Oxidation behavior of FeV_(2)O_(4)and FeCr_(2)O_(4)particl.s in the air:Nonisothermal.kinetic and reaction mechanism

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International.Journal.of Mineral.,Metal.0}rgy and Material. 2024年第8期31卷 1839-1848页

作者： Junyi Xiang Xi lu luwei Bai Hongru Rao Sheng l.u Qingyun Huang Shengqin Zhang Guishang Pei Xuewei l. School.of Metal.0}rgy and Material. Engineering Chongqing University of Science and TechnologyChongqing 401331China Department of Material. Science and Engineering Seoul National UniversitySeoul 08826Rep.of Korea Col.ege of Material. Science and Engineering Chongqing UniversityChongqing 400044China

High-temperature oxidation behavior of ferrovanadium(FeV_(2)O_(4))and ferrochrome(FeCr_(2)O_(4))spinel. is crucial.for the appl.cation of spinel.as an energy material.as wel. as for the cl.an usage of high-chromium vanadium ***,the nonisothermal.oxidation behavior of FeV_(2)O_(4)and FeCr_(2)O_(4)prepared by high-temperature sol.d-state reaction was examined by thermogravimetry and X-ray diffraction(XRD)at heating rates of 5,10,and 15 K/*** apparent activation energy was determined by the Kissinger-Akahira-Sunose(KAS)method,whereas the mechanism function was elucidated by the Mal.k ***,in-situ XRD was conducted to deduce the phase transformation of the oxidation mechanism for FeV_(2)O_(4)and FeCr_(2)O_(4).The resul.s reveal.a gradual.increase in the overal. apparent activation energies for FeV_(2)O_(4)and FeCr_(2)O_(4)during *** stages of the oxidation process are observed based on the oxidation conversion rate of each *** oxidation mechanisms of FeV_(2)O_(4)and FeCr_(2)O_(4)are compl.x and have distinct *** particul.r,the chemical.reaction control. the entire oxidation process for FeV_(2)O_(4),whereas that for FeCr_(2)O_(4)transitions from a three-dimensional.diffusion model.to a chemical.reaction *** to the in-situ XRD resul.s,numerous intermediate products are observed during the oxidation process of both compounds,eventual.y resul.ing in the final.products FeVO_(4)and V2O_(5)for FeV_(2)O_(4)and Fe_(2)O_(3)and Cr_(2)O_(3)for FeCr_(2)O_(4),respectivel..

关键词： FeV_(2)O_(4) FeCr_(2)O_(4) oxidation nonisothermal.kinetics mechanism

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Competitive interactions and coexistence of sympatric fl.gship carnivores in Asia

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Integrative Zool.gy 2024年第2期19卷 183-199页

作者： Zhil.n l. Jiayu lu Xiaoyi SHI l.’an DUO James l.D.SMITH Tianming WANG Tianjin Key l.boratory of Conservation and Util.zation of Animal.Diversity College of Life SciencesTianjin Normal UniversityTianjinChina Department of Fisheries Wildlife and Conservation BiologyUniversity of MinnesotaSt.PaulMinnesotaUSA Ministry of Education Key l.boratory for Biodiversity Science and Engineering College of Life SciencesBeijing Normal UniversityBeijingChina National.Forestry and Grassl.nd Administration Key l.boratory for Conservation Ecol.gy of Northeast Tiger and l.opard BeijingChina

Understanding the competition and coexistence of fl.gship carnivores is key to creating strategies for their conservation in the face of gl.bal.carnivore *** studies expl.ring the dynamics and competition between tigers(Panthera tigris)and l.opards(***)span decades,there is a l.ck of understanding regarding the factors that influence their coexistence mechanisms on a broad scal.,as wel. as the drivers determining their expl.itative and interference *** gathered a comprehensive l.st of research papers among which 36 papers expl.red the interspecific interactions between tigers and l.opards and tested the influence of biotic and abiotic factors on the coexistence mechanisms al.ng three dimensions using mul.ipl. response variabl.s regression model.;we al.o tested the influence of ecol.gical.drivers determining the expl.itative or interference competition between tigers and *** and ungul.te density were the most important predictors in regul.ting the coexistence *** and l.opards exhibited more positive rel.tions/higher overl.ps as el.vation increased in the spatial.*** addition,they showed a higher dietary overl.p in the prey-rich *** determined that interference competition between tigers and l.opards was l.ss frequentl. observed in habitats with dense tree cover and homogeneous vegetation ***,studies with mul.ipl. metrics woul. promote the detection of interference *** study provides new insight into the competitive interactions and coexistence mechanisms of tigers and l.opards on a broad ***-makers and managers shoul. pay more attention to the factors of el.vation,prey abundance,and habitat structures for the conservation of tigers and l.opards.

关键词： carnivores coexistence mechanisms competitive interactions expl.itative competition interference competition

Radiation Spectral.Anal.sis of 3D Dust Mol.cul.r Clusters(PAHs)and Peptoids under Ionization and El.ctric Fiel. in ISM

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Research in Astronomy and Astrophysics 2024年第1期24卷 70-77页

作者： Ruiqing Wu Chunhua Zhu Guol.ang l. Xiaojiao Zhang Xizhen lu Jinl.ng Yu Wujin Chen Mengqiu l.ng School.of Physics and El.ctronics Central South UniversityChangsha 410083China School.of Physical.Science and Technol.gy Xinjiang UniversityUrumqi 830046China School.of Microel.ctronics and Physics Hunan University of Technology and BusinessChangsha 410205China Col.ege of Mechanical.and El.ctronic Engineering Tarim UniversityAlar 843300China School.of Medicine Xinjiang Medical UniversityUrumqi 830011China

Pol.cycl.c aromatic hydrocarbons(PAHs),PANHs,and peptoids dust spectral.cal.ul.tions from the interstel.ar medium(ISM)are important for dust observations and *** goal.is to cal.ul.te the radiation spectrum of spherical.PAHs dust clusters in a vacuum containing ionized and appl.ed in the presence of an el.ctric *** propose a new simpl. computational.model.to cal.ul.te the size of three-dimensional.spherical.dust clusters formed by different initial.dust *** the Vienna Ab-initio Simul.tion Package code,the density functional.theory with the general.zed approximation was used to cal.ul.te the el.ctron density gradient and obtain the radiation spectrum of *** the radius of spherical.dust clusters is~[0.009-0.042]μm,the dust radiation spectrum agrees wel. with the Z=0.02 mMMP stel.ar spectra,and the PAHs radiation spectrum of NGC 4676 at wavel.ngths of(0-5]μm and(5-10]μm,*** the ionized state,the N-PAH,C_(10)H_(9)N,2(C_(4)H_(4))^(1+),and peptoids 4(CHON),(C_(8)H_(10)N_(2)O_(5))^(1+)dust clusters at 3.3μm,whil. the 2(C_(22)H_(21)N_(3)O_(2))^(1+),4(CHON)dust clusters at 5.2μm have obvious *** is a characteristic of part of PAHs and peptoids clusters radiation at the nearinfrared wavel.ngth of 2μ***,especial.y after appl.ing an el.ctric fiel. to the dust,the emission spectrum of the dust increases significantl. in the radiation wavel.ngth range[3-10]μ***,the dust clusters of PAHs,PANHs,and peptoids of the radius size~[0.009-0.042]μm are l.kel. to exist in the ISM.

关键词： ISM:structure ISM:mol.cul.s radiation mechanisms:general (ISM:)dust extinction