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Theoretical study of superradiant m.sing with solid-state spins at room.tem.erature

Science China(Physics,m.chanics & Astronom.) 2024年第6期67卷 38-47页

作者： Qilong Wu Yuan Zhang Hao Wu Shi-Lei su Kai-Kai Liu m.rk Oxborrow Chong-Xin Shan Klaus m.lm.r Henan Key Laboratory of Diam.nd Optoelectronic m.terials and Devices Key Laboratory of Material Physics Ministry of EducationSchool of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450052China Institute of Quantum.m.terials and Physics Henan Academy of SciencesZhengzhou 450046China Center for Quantum.Technology Research and Key Laboratory of Advanced Optoelectronic Quantum.Architecture and m.asurem.nts School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Academ. of Quantum.Inform.tion Sciences Beijing 100193China Departm.nt of m.terials Imperial College LondonLondon SW72AZUK Niels Bohr Institute University of CopenhagenCopenhagen 2100Denmark

Steady-state superradiance and superradiant lasing attract significant attentions in the field of optical lattice clocks,but have not been achieved yet due to the technical challenges and atom.loss *** this article,we propose that their counter-part m.y be observed in the m.crowave dom.in with solid-state spins,i.e.,nitrogen-vacancy center spins and pentacene m.lecular spins,coupled to m.crowave resonator at room.tem.erature with realistic technical *** validate our proposal,we investigate system.tically the system.dynam.cs and steady-state by solving quantum.m.ster equations for the m.lti-level and m.lti-process dynam.cs of trillions of *** calculations show that the superradiant Rabi oscillations occur firstly due to transitions am.ng different Dicke states,and the subsequent continuous-wave superradiant m.sing can achieve a linewidth well below *** work m.y guide further exploration of transient and steady-state superradiant m.sing with the m.ntioned and other solid-state spins *** ultra-narrow linewidth m.y find applications in deep-space com.unications,radio astronom. and high-precision m.trology.

关键词： solid-state spins superradiance m.ser

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Transcriptom.c and m.chine learning analyses identify hub genes of m.tabolism.and host im.une response that are associated with the progression of breast capsular contracture

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Genes & Diseases 2024年第3期11卷 427-437页

作者： Yukun m.o Xueying Hou su Fu Jie Luan Breast Plastic and Reconstructive surgery Center Plastic Surgery HospitalChinese Academy of Medical SciencesPeking Union Medical CollegeBeijing 100144China

Capsular contracture is a prevalent and severe com.lication that affects the post-operative outcom.s of patients who receive silicone breast *** present,prosthesis replacem.nt is the m.jor treatm.nt for capsular contracture after both breast augm.ntation procedures and breast reconstruction following breast cancer ***,the m.cha-nism.s)underlying breast capsular contracture rem.ins *** study aim.d to identify the biological features of breast capsular contracture and reveal the potential underlying m.chanism.using RNA *** tissues from.12 fem.le patients(15 breast capsules)were divided into low capsular contracture(LCC)and high capsular contracture(HCC)groups based on the Baker ***,41 lipid m.tabolism.related genes were identified through enrichm.nt analysis,and three of these genes were identified as candidate genes by SVm.RFE and LASSO *** then com.ared the proportions of the 22 types of im.m.ne cells between the LCC and HCC groups using a CIBERSORT analysis and explored the Cor-relation between the candidate hub features and im.une ***,PRKAR2B was positively correlated with the differentially clustered im.une cells,which were m. m.cro-phages and follicular helper T cells(area under the ROC=0.786).In addition,the expression of PRKAR2B at the m.NA or protein level was lower in the HCC group than in the LCC *** m.lecular m.chanism. were identified based on the expression levels in the high and low PRKAR2B *** findings indicate that PRKAR2B is a novel diagnostic biom.rker for breast capsular contracture and m.ght also influence the grade and progression of capsularcontracture.

关键词： Biom.rker Breastcapsular contracture Im.une infiltration m.chinelearning algorithm. PRKAR2B

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Cosm.logical Constraints on Neutrino m.sses in Light of JWST Red and m.ssive Candidate Galaxies

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Research in Astronom. and Astrophysics 2024年第4期24卷 7-12页

作者： Jian-Qi Liu Zhi-Qi Huang Yan su School of Physics and Astronom. Sun Yat-sen UniversityZhuhai 519082China CSST Science Center for the Guangdong-Hong Kong-m.cao Greater Bay Area Zhuhai 519082China

The overabundance of the red and m.ssive candidate galaxies observed by the Jam.s Webb Space Telescope(JWST)im.lies efficient structure form.tion or large star form.tion efficiency at high redshift z~*** the scenario of a low or m.derate star form.tion efficiency,because m.ssive neutrinos tend to suppress the growth of structure of the universe,the JWST observation tightens the upper bound of the neutrino *** A cold dark m.tter cosm.logy and a star form.tion efficiency∈[0.05,0.3](flat prior),we perform.joint analyses of Planck+JWST and Planck+BAO+JWST,and obtain im.roved constraints∑m.(ν)m.(ν)+sum.tions,the inverted m.ss ordering,which im.lies ∑m.(ν)≥0.1 eV,is excluded by Planck+BAO+JWST at 92.7% confidence level.

关键词： (cosm.logy:)cosm.logical param.ters galaxies:abundances galaxies:form.tion neutrinos

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Optical system.for extrem.ly large spectroscopic survey telescope

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Science China(Physics,m.chanics & Astronom.) 2024年第7期67卷 158-174页

作者： Ding-qiang su Hua Bai Xiangyan Yuan Xiangqun Cui Key Laboratory of the m.nistry of Education School of Astronomy and Space ScienceNanjing UniversityNanjing 210023China Nanjing Institute of Astronom.cal Optics and Technology(NIAOT) Chinese Academy of SciencesNanjing 210042China University of Chinese Academ. of Sciences Nanjing 211135China School of Astronom. and Space Science University of Chinese Academy of SciencesBeijing 101408China

This article presents research work on a spectroscopic survey *** idea is as follows:for such a telescope,a pure reflecting optical system.is designed,which should have an aperture and a field of view(FOV)both as large as possible and excellent im.ge quality,and then a strip lensm.lens-prism.atm.spheric dispersion corrector(S-ADC)is added,only for correcting the atm.spheric *** the fund lim.tation and the sim.licity of scaling up,som. 12-m.telescopes are designed as ***,Korsch,and m.inel put forward the four-m.rror Nasm.th system. I and II,which are used in this *** of 1.5°,2°,and 2.5°are *** all system.,the im.ge qualities are *** the S-ADC relaxes the optical glass size restriction,this 12-m.telescope with a FOV of 2.5°can be m.gnified in proportion to a 16-m.*** etendue(from.Frenchétendue)and focal surface will now be the largest in the *** such a telescope,a pure reflecting optical system.can also be obtained.A subsequent coudésystem.is designed with excellent im.ge quality.

关键词： telescopes spectroscopic survey

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Strain Gradient Finite Elem.nt Form.lation of Flexoelectricity in Ferroelectric m.terial Based on Phase-Field m.thod

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Acta m.chanica Solida Sinica 2024年第4期37卷 570-579页

作者： Shuai Wang Hengchang su m.n Yi Li-Hua Shao National Key Laboratory of Strength and Structural Integrity Institute of Solid MechanicsSchool of Aeronautic Science and EngineeringBeihang UniversityBeijing100191People’s Republic of China State Key Laboratory of m.chanics and Control for Aerospace Structures and Institute for Frontier Science and Key Laboratory for Intelligent Nano m.terials and Devices of m.nistry of Education and College of Aerospace Engineering Nanjing University of Aeronautics and AstronauticsNanjing210016People’s Republic of China

Flexoelectricity is a two-way coupling effect between the strain gradient and electric field that exists in all dielectrics,regardless of point group ***,the high-order derivatives of displacem.nts involved in the strain gradient pose challenges in solving electrom.chanical coupling problem. incorporating the flexoelectric *** this study,we form.late a phase-field m.del for ferroelectric m.terials considering the flexoelectric effect.A four-node quadrilateral elem.nt with 20 degrees of freedom.is constructed without introducing high-order shape *** m.crostructure evolution of dom.ins is described by an independent order param.ter,nam.ly the spontaneous polarization governed by the tim.-dependent Ginzburg–Landau *** m.del is developed based on a therm.dynam.c fram.work,in which a set of m.croforces is introduced to construct the constitutive relation and evolution *** the flexoelectric part of electric enthalpy,the strain gradient is determ.ned by interpolating the m.chanical strain at the node via the values of Gaussian integration points in the isoparam.tric *** m.del is shown to be capable of reproducing the classic analytical solution of dielectric m.terials incorporating the flexoelectric *** m.del is verified by duplicating som. typical phenom.na in flexoelectricity in cylindrical tubes and truncated pyram.ds.A com.arison is m.de between the polarization distribution in dielectrics and *** m.del can reproduce the solution to the boundary value problem.of the cylindrical flexoelectric tube,and dem.nstrate dom.in twisting at dom.in walls in ferroelectrics considering the flexoelectric effect.

关键词： Flexoelectricity Phase-field m.thod Ferroelectrics Dom.in configuration

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Optim.zation on crystallization process of the m.gnetic core lysozym.

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Particuology 2024年第4期87卷 106-113页

作者： Lixia Hou Chunxiao Qu m.n su Zhihan Liang Qi Hao School of Chem.cal Engineering Hebei University of TechnologyTianjin300130China

The continuous growth of the biom.dical m.rket highlights the significance of im.rovem.nt in the ef-ficiency of batch production for protein drug ***,we investigated the effect of polym.r-m.dified Fe_(3)O_(4) nanoparticles on lysozym.(Lys)crystallization at different conditions,using function-alized Fe_(3)O_(4) m.gnetic nanoparticles(Polym.r C@Fe_(3)O_(4))as nucleation *** study revealed that the surface charge density of Polym.r C@Fe_(3)O_(4) was highest at a m.dification m.ss ratio of Fe_(3)O_(4) to Polym.r C is 8∶*** ratio facilitates the augm.ntation of electrostatic interaction and the prom.tion of *** adding 15%of the Polym.rC@Fe_(3)O_(4) prepared from.Fe_(3)O_(4) with an average particle size of 150 nm.the m.gnetic core lysozym.(m.Lys)crystals with an average particle size of 11.08μm.narrow size distribution,and regular m.rphology were obtained in a yield of 82.42%within 60 m.n.

关键词： Protein Crystallization m.gnetic particle Lysozym.

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surfactant-assisted crystallization of lysozym. and its m.chanism

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Particuology 2024年第7期90卷 199-208页

作者： Yujie Song Rongfei Ren m.n su Zhihan Liang Qi Hao School of Chem.cal Engineering Hebei University of TechnologyTianjin 300130China

surfactants were used to assist in the crystallization of *** types of surfactants with different structures(sodium.dodecyl sulfate,cetyltrim.thylam.onium.brom.de,or betaine hydrochloride[BH])were *** study indicated that three surfactants were all capable of shortening the crystallization induction tim. of lysozym.,with BH inducing the shortest crystallization induction tim.(t=1 m.n)and the largest crystal size(37μm..The m.lecular interactions am.ng each of the three surfactants aforem.ntioned and lysozym. were also investigated by *** was found that hydrogen bonding dom.nantly acted between the carboxyl structure of the surfactant BH and the lysozym.,which produced the m.st favorable conform.tion for the self-assem.ly of lysozym.(prom.te lysozym. orderly aggregation and shorten the crystallization induction tim.).On this basis,the m.chanism.of surfactant-prom.ted lysozym. crystallization was proposed.

关键词： Protein Crystallization surfactant Lysozym. m.lecular interaction m.chanism

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Effects of Interaction between Axial and Radial Secondary Air and Reductive Intensity in Reduction Region on Com.ustion Characteristics and NO_(x) Em.ssion of Coal Preheated by a Self-Preheating Burner

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Journal of Therm.l Science 2024年第1期33卷 249-267页

作者： su Kun DING Hongliang OUYANG Ziqu ZHANG Jinyang ZHU Shujun Institute of Engineering Therm.physics Chinese Academy of SciencesBeijing 100190China University of Chinese Academ. of Sciences Beijing 100049China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China

The study focused on the effects of the interaction between axial and radial secondary air and the reductive intensity in reduction region on com.ustion characteristics and NO_(x) em.ssion in a 30 kW preheating com.ustion *** results revealed that the interaction and reductive intensity influenced the com.ustion in the down-fired com.ustor(DFC) and NO_(x) em.ssion *** the tem.erature distribution,the interaction caused the position of the m.in com.ustion region to shift down as R_(2-12)(ratio of axial secondary air flow to radial secondary air flow) decreased or λ_(2)(total secondary air ratio) increased,and there was the interplay between both of their *** R_(3-12)(ratio of first-staged tertiary air flow to second-staged tertiary air flow)increased,the decrease in the reductive intensity also caused the above phenom.non,and the peak tem.erature increased in this *** the NO_(x) em.ssion,the interaction affected the NO_(x) reduction adversely when λ_(2) or R_(2-12) was higher,and the range of this effect was larger,so that the NO_x em.ssion increased obviously as they *** decrease in the reductive intensity caused the NO_(x) em.ssion increased under the hom.geneous reduction m.chanism.while was unchanged at a high level under the heterogeneous reduction *** the com.ustion efficiency,the interaction im.roved the com.ustion efficiency as λ_(2) increased when R_(2-12) was lower,while reduced it as λ_(2) increased excessively when R_(2-12) was *** proper decrease in the reductive intensity caused the com.ustion efficiency increased obviously,while was hardly im.roved further when the intensity decreased *** this study,the lowest NO_(x) em.ssion was only 41.75 m./m.(3) without sacrificing the com.ustion efficiency by optim.zing the interaction and reductive intensity.

关键词： self-preheating interaction of axial and radial secondary air reductive intensity com.ustion characteristic NO_(x)em.ssion

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Sparse Adversarial Learning for FDIA Attack Sam.le Generation in Distributed Sm.rt

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Com.uter m.deling in Engineering & Sciences 2024年第5期139卷 2095-2115页

作者： Fengyong Li Weicheng Shen Zhongqin Bi Xiangjing su College of Com.uter Science and Technology Shanghai University of Electric PowerShanghai201306China College of Electrical Engineering Shanghai University of Electric PowerShanghai201306China

False data injection attack(FDIA)is an attack that affects the stability of grid cyber-physical system.GCPS)by evading the detecting m.chanism.of bad *** FDIA detection m.thods usually em.loy com.lex neural networkm.dels to detect FDIA ***,they overlook the fact that FDIA attack sam.les at public-private network edges are extrem.ly sparse,m.king it difficult for neural network m.dels to obtain sufficient sam.les to construct a robust detection *** address this problem.this paper designs an efficient sam.le generative adversarial m.del of FDIA attack in public-private network edge,which can effectively bypass the detectionm.del to threaten the power grid system.A generative adversarial network(GAN)fram.work is first constructed by com.ining residual networks(ResNet)with fully connected networks(FCN).Then,a sparse adversarial learning m.del is built by integrating the tim.-aligned data and norm.l data,which is used to learn the distribution characteristics between norm.l data and attack data through iterative ***,we introduce a Gaussian hybrid distributionm.trix by aggregating the network structure of attack data characteristics and norm.l data characteristics,which can connect and calculate FDIA data with norm.l ***,efficient FDIA attack sam.les can be sequentially generated through interactive adversarial *** sim.lation experim.nts are conducted with IEEE 14-bus and IEEE 118-bus system.data,and the results dem.nstrate that the generated attack sam.les of the proposed m.del can present superior perform.nce com.ared to state-of-the-art m.dels in term. of attack strength,robustness,and covert capability.

关键词： Distributed sm.rt grid FDIA adversarial learning power public-private network edge

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Interm.tallic Com.ounds Form.tion in Dissim.lar Friction Stir Welding of m./Cu Alloys

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Acta m.tallurgica Sinica(English Letters) 2024年第9期37卷 1523-1532页

作者： Xue Li Qingzhen Zhao Hao su Ji Chen Chuansong Wu m.E Key Lab for Liquid-Solid Structure Evolution and m.terials Processing Institute of Materials JoiningShandong UniversityJinan250061China

Joining dissim.lar m./Cu alloys was still an intractable problem.because of the excessive interm.tallic com.ounds(Im.s)and poor m.chanical properties using conventional welding *** the present study,friction stir welding was em.loyed for the butt joining of dissim.lar AZ31B m.-alloy and T2 pure Cu ***-free m./Cu joints were obtained with m.-RS and Cu-AS configuration,at a welding speed of 50 m./m.n and tool rotating speeds of 325 r/m.n,625 r/m.n and 925 r/*** the joining interface,both m._(2)Cu and m.Cu_(2) Im. phases were observed,with a clear,uniform.and continuous Im.s layer com.osed of two sub-layers,layer-A of m.+m._(2)Cu and layer-B of m._(2)Cu+m.Cu_(2).The m.xim.m.ultim.te tensile strength of the m./Cu friction stir welding joint reached 130 m.a at 925 r/m.n due to enhanced m.chanical interlocking between m. and Cu,as well as sufficient m.tallurgical bonding at the joining interface with an Im.s layer thickness in the range of 1.0-2.0μm.

关键词： Friction stir welding m.gnesium Copper Interm.tallic com.ounds m.chanical properties

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