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Ab initio density functional theory approach to warm dense hydrogen:From density response to electronic correlations 认领 引用 被引量：1
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作者 Zhandos A.Moldabekov Xuecheng Shao +5 位作者 Hannah M.Bellenbaum Cheng Ma Wenhui Mi Sebastian Schwalbe Jan Vorberger Tobias Dornheim 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第2期14-20,共7页
Understanding the properties of warm dense hydrogen is of key importance for the modeling of compact astrophysical objects and to understand and further optimize inertial confinement fusion applications.The workhorse ... Understanding the properties of warm dense hydrogen is of key importance for the modeling of compact astrophysical objects and to understand and further optimize inertial confinement fusion applications.The workhorse of warm dense matter theory is thermal density functional theory(DFT),which,however,suffers from two limitations:(i)its accuracy can depend on the utilized exchange-correlation functional,which has to be approximated,and(ii)it is generally limited to single-electron properties such as the density distribution.Here,we present a new ansatz combining time-dependent DFT results for the dynamic structure factor See(q,ω)with static DFT results for the density response.This allows us to estimate the electron-electron static structure factor See(q)of warm dense hydrogen with high accuracy over a broad range of densities and temperatures.In addition to its value for the study of warm dense matter,our work opens up new avenues for the future study of electronic correlations exclusively within the framework of DFT for a host of applications. 展开更多
关键词 thermal density functional theory dft whichhoweversuffers understanding properties warm dense hydrogen thermal density functional theory understand further optimize inertial confinement fusion applicationsthe warm dense matter theory electronic correlations warm dense hydrogen density functional theory
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An Optimization-Based Consensus Approach for Distributed Density Regulation of Swarms 认领 引用
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作者 Di Cui Huiping Li 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第5期1248-1250,共3页
Dear Editor,This letter addresses the distributed density regulation problem for large-scale robotic swarms.To accommodate swarm size,system dynamics are formulated within an Eulerian framework,modeling the swarm’s a... Dear Editor,This letter addresses the distributed density regulation problem for large-scale robotic swarms.To accommodate swarm size,system dynamics are formulated within an Eulerian framework,modeling the swarm’s actual density distribution(ADD)as a probability distribution,with state transition probabilities governed by a Markov matrix. 展开更多
关键词 markov matrix state transition probabilities eulerian frameworkmodeling distributed density regulation density distribution add probability distributionwith distributed density regulation problem robotic swarmsto
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Probing AGN Disks Density Profiles through Gravitational Wave Observations 认领 引用
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作者 Xiangyu Lyu En-Kun Li +1 位作者 Changfu Shi Yi-Ming Hu 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第6期177-181,共5页
Massive black holes surrounded by a gaseous disk have been a prevailing model to explain a wide spectrum of astrophysical phenome-na related to active galactic nuclei(AGNs).However,direct and precise measurements of t... Massive black holes surrounded by a gaseous disk have been a prevailing model to explain a wide spectrum of astrophysical phenome-na related to active galactic nuclei(AGNs).However,direct and precise measurements of the disk density profiles remain elusive for current telescopes.In this work,we demonstrate that it is possible to pinpoint the gas density if an inspiralling stellar mass binary black hole is embedded in the AGN disk.Furthermore,if the barycenter of the pair follows an eccentric orbit around an AGN,then space-borne gravitational wave detectors can measure the density of the surrounding disk with multi-year observations by tracking the gravitational wave evolution.The error between the inferred density profile and the injected truth can be constrained to below 2×10-11 g/cm3.Our work opens up an exciting new channel to investigate the very center of galaxies,where disk gas density distributionsρ(r)can be recovered by analyzing time-dependent environmental imprints in gravitational waveforms. 展开更多
关键词 inspiralling stellar mass binary black hole pinpoint gas density black holes massive black holes gaseous disk density profiles active galactic nuclei agns howeverdirect gravitational waves
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NeoMinkowskian Cosmological Black Hole, Poincaré’s Gravific Electron and Density of CBR 认领 引用 被引量：1
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作者 Yves Pierseaux 《Journal of Modern Physics》 2020年第2期237-280,共44页
In the previous paper (JMP 2014) we showed that there exists a NeoMinkowskian Gravitational Expanding Solution of GR (General Relativity) with CC (Cosmological Constant). We prove now that NeoMinkowskian Vacuum (non-b... In the previous paper (JMP 2014) we showed that there exists a NeoMinkowskian Gravitational Expanding Solution of GR (General Relativity) with CC (Cosmological Constant). We prove now that NeoMinkowskian Vacuum (non-baryonic Fluid), with gravitational (first) density (dark energy) and gravitational waves (at light speed), corresponds to the Gravitation Field of a Cosmological Black Hole (CBH). The latter predicts furthermore a basic emission of Radiation (CBR) from Hubble spherical singular Horizon to the inside of CBH (unlike Hawking’s emission) at an initial singular time. Our solution is then compatible with a well-tempered Big Bang and Expanding Universe (Escher’s Figure, see Penrose, 3) but incompatible with inflation. The latter is based on Hypothesis of a so-called Planck’s particle (Lemaitre’s primitive atom) characterized by a so-called Planck length. We prove that we can short-circuit this unstable particle with a stable cosmological Poincaré’s electron with gravific pressure. It is well known that electron is a stranger in usual Minkowskian vacuum (dixit Einstein). The stranger electron can be perfectly integrated in NeoMinkowskian Radiation fluid and then also (with its mass, charge and wavelength) in (second density of) CBR. Everything happens as if the leptonic mass of the electron were induced by our cosmological field. The unexpected cosmological model proposed here is the only one that predicts numerical values of (second) density and temperature of CBR very close to the observed (COBE) values. 展开更多
关键词 Cosmological Constant General Relativity Minkowskian Metric Cosmolog-ical Black Hole Tachyons Hyperbolic Horizon Density of Vacuum Density of CBR Poincaré’s Gravitational Waves Poincaré’s Electron De Broglie’s Wave Electrodynamics De Broglie’s Subquantum Substratum
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Critical Density-Wave Vestigial Phases of Commensurate Pair Density Wave 认领 引用
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作者 Chu-Tian Gao Jing Zhou +1 位作者 Yu-Bo Liu Fan Yang 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第5期115-153,共39页
The pair density wave(PDW)is an exotic pairing state hosting a spatially modulated pairing order parameter,which has attracted great interest.Due to its simultaneously breaking U(1)-gauge and translational symmetries,... The pair density wave(PDW)is an exotic pairing state hosting a spatially modulated pairing order parameter,which has attracted great interest.Due to its simultaneously breaking U(1)-gauge and translational symmetries,intriguing vestigial phases which restore only one broken symmetry can emerge at an intermediate temperature regime.Previously,investigations on the vestigial phases of PDW were mainly focused on incommensurate PDW.However,the experimentally observed PDW is usually commensurate,whose vestigial phases have not been systematically investigated.Here we study the vestigial phases of 2D commensurate PDW with n-times(n≥3)expanded unit vectors,hosting different numbers of wave vectors.Based on the GinzburgśLandau theory,we get the low energy effective model Hamiltonian from typical PDW ground state configurations.Subsequent renormalization group(RG)and Monte-Carlo(MC)studies are conducted to obtain the phase diagram and spatial dependent correlation functions.Our RG and MC calculations consistently yield the following result.For nt≤4(t=1 for odd n and t=1/2 for even n),besides the charge-4e/2e superconductivity,there exists the translational symmetry broken charge-density-wave(CDW)vetigial phase.Intriguingly,for nt≥5(specifically,for odd n,n≥5,and for even n,n≥10),the restoration of the translational symmetry with increasing temperature is realized through two successive Berezinskiis Kosterlitzs Thouless transitions.Such a two-step process leads to two critical vestigial phases,i.e.,the critical-PDW and the critical-CDW phases,in which the discrete translational symmetry is quasily broken,leading to a power-law decaying densityśdensity correlation even at 2D.Our work appeals for experimental verifications. 展开更多
关键词 pair density wave pdw Monte Carlo Ginzburg Landau theory renormalization group commensurate pair density wave vestigial phases critical density wave phase diagram
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Demonstration of full-scale spatiotemporal diagnostics of solid-density plasmas driven by an ultra-short relativistic laser pulse using an X-ray free-electron laser 认领 引用 被引量：2
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作者 Lingen Huang Michal Smíd +42 位作者 Long Yang Oliver Humphries Johannes Hagemann Thea Engler Xiayun Pan Yangzhe Cui Thomas Kluge Ritz Aguilar Carsten Baehtz Erik Brambrink Engin Eren Katerina Falk Alejandro Laso Garcia Sebastian Gode Christian Gutt Mohamed Hassan Philipp Heuser Hauke Hoppner Michaela Kozlova Wei Lu Josefine Metzkes-Ng Masruri Masruri Mikhail Mishchenko Motoaki Nakatsutsumi Masato Ota Ozgül Oztürk Alexander Pelka Irene Prencipe Thomas R.Preston Lisa Randolph Martin Rehwald Hans-Peter Schlenvoigt Ulrich Schramm Jan-Patrick Schwinkendorf Sebastian Starke Radka Stefaníková Erik Thiessenhusen Monika Toncian Toma Toncian Jan Vorberger Ulf Zastrau Karl Zeil Thomas E.Cowan 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第1期6-19,共14页
Understanding the complex plasma dynamics in ultra-intense relativistic laser-solid interactions is of fundamental importance for applications of laser-plasma-based particle accelerators,the creation of high-energy-de... Understanding the complex plasma dynamics in ultra-intense relativistic laser-solid interactions is of fundamental importance for applications of laser-plasma-based particle accelerators,the creation of high-energy-density matter,understanding planetary science,and laser-driven fusion energy.However,experimental efforts in this regime have been limited by the lack of accessibility of over-critical densities and the poor spatiotemporal resolution of conventional diagnostics.Over the last decade,the advent of femtosecond brilliant hard X-ray free-electron lasers(XFELs)has opened new horizons to overcome these limitations.Here,for the first time,we present full-scale spatiotemporal measurements of solid-density plasma dynamics,including preplasma generation with tens of nanometer scale length driven by the leading edge of a relativistic laser pulse,ultrafast heating and ionization at the main pulse arrival,the laser-driven blast wave,and transient surface return current-induced compression dynamics up to hundreds of picoseconds after interaction.These observations are enabled by utilizing a novel combination of advanced X-ray diagnostics including small-angle X-ray scattering,resonant X-ray emission spectroscopy,and propagation-based X-ray phase-contrast imaging simultaneously at the European XFEL-HED beamline station. 展开更多
关键词 preplasma generation spatiotemporal diagnostics understanding complex plasma dynamics x ray free electron laser planetary scienceand conventional diagnosticsover solid density plasmas ultra short relativistic laser pulse
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Artificial Cooper-Pair Density Modulation in Buckled Heterostructure 认领 引用
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作者 Zhongrui Wang Yingbo Wang +10 位作者 Xiangjia Bai Lu Cao Yucheng Xue Yang Cao Dawei Zhai Hong-Jun Gao Francois M.Peeters Bert Jorissen Lucian Covaci Yuhang Jiang Jinhai Mao 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第3期147-176,共30页
The pair density wave(PDW),characterized by a periodic real-space modulation of the superconducting pairing order parameter,is a novel quantum phase observed in superconducting(SC)systems.It is believed to play a key ... The pair density wave(PDW),characterized by a periodic real-space modulation of the superconducting pairing order parameter,is a novel quantum phase observed in superconducting(SC)systems.It is believed to play a key role in understanding the pseudogap phase of superconductors and has recently been discovered in bulk cuprates,transition-metal dichalcogenide,and other unconventional superconductors.However,artificially engineered PDW in designable two-dimensional materials remain rare.In this paper,we report a strain-assisted strategy to realize cooper-pair density modulation in a van der Waals heterostructure:graphene on SC 2H-NbSe2.Superconductivity is induced in graphene via the proximity effect.Meanwhile,the graphene membrane spontaneously buckles into a periodic structure owing to strain,featuring a spatially modulated local density of states(LDOS).The interplay between the spatially modulated LDOS and the proximity-induced superconductivity results in an oscillatory pair density determined by the buckled geometry,constituting an artificial PDW.This approach enables the engineering of PDWs with periodicities of up to tens of nanometers and allows their realization in a variety of heterostructures with tailored designs.Our work provides new insights into the investigation of PDW physics using predesigned two-dimensional materials. 展开更多
关键词 strain assisted strategy graphene proximity effect quantum phase artificial Cooper pair density modulation van der waals heterostructure pseudogap phase bulk cupratestransition metal
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Pressure-induced high-energy-density and superhard Be-C-O compounds 认领 引用
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作者 Jinming Zhu Kuo Bao +3 位作者 Zhaoqing Wang Yuan Qin Hongyu Yu Tian Cui 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第2期95-103,共9页
Light element compounds under high pressure display intriguing properties and applications,owing to their diverse bonding patterns and crystalline structures.However,the system of ternary Be-C-O compounds under high p... Light element compounds under high pressure display intriguing properties and applications,owing to their diverse bonding patterns and crystalline structures.However,the system of ternary Be-C-O compounds under high pressure,as the lightest representative of the IIA-IVA-VIA family,remains largely unexplored.Using a machine-learning-accelerated crystal structure search and first-principles calculations,Be-C-O phase diagrams are investigated at pressures ranging from 0 to 100 GPa.Four ternary compounds are proposed to be stable at corresponding pressures:BeCO3,Be2CO4,Be2C4O3,and BeC4O2.Analyses of electronic structure and chemical bonding further reveal how the structural diversity of these compounds is induced.Remarkably,Be2C4O3 and BeC4O2 are recoverable to ambient conditions and possess both high energy density and high hardness.The volumetric energy densities of Be2C4O3 and BeC4O2 could approach 9.03 and 7.94 kJ/cm3,respectively.The Vickers hardnesses of Be2C4O3 and BeC4O2 are found to be close to 39.58 and 51.57 GPa,respectively.These findings demonstrate the structural and functional diversity of Be-C-O compounds under high pressure,providing guidance for further exploration of the IIA-IVA-VIA compounds. 展开更多
关键词 bonding patterns ternary compounds superhard high energy density crystal structure search light element compounds be c o compounds pressure induced
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Long-lasting plasma density structures utilizing tailored density profiles 认领 引用
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作者 M.Luo C.Riconda +4 位作者 A.Grassi N.Wang J.S.Wurtele I.Pusztai T.Fülöp 《Matter and Radiation at Extremes》 SCIE EI CAS CSCD 2026年第4期23-32,共10页
Using fully kinetic particle-in-cell simulations,we investigate the stability and performance of autoresonant plasma beat-wave excitation in plasmas with tailored density profiles.We show that a prescribed spatial var... Using fully kinetic particle-in-cell simulations,we investigate the stability and performance of autoresonant plasma beat-wave excitation in plasmas with tailored density profiles.We show that a prescribed spatial variation of the background density sustains continuous phase locking between the driving laser beat and the excited plasma mode,thereby enabling precise control of the shape and group velocity of the plasma wavepacket and providing an alternative to frequency chirping of the drive lasers.The density-gradient scale is found to govern the nonlinear autoresonant growth,and the attainable saturation amplitude can exceed the classical Rosenbluth-Liu prediction and,for appropriate laser intensities,approach the nonrelativistic wave-breaking limit.We show that a four-laser configuration in a steep parabolic density profile can generate a specially confined two-phase quasi-periodic plasma lattice.The generation of such structures may lead to novel applications in plasma photonics. 展开更多
关键词 plasma beat wave excitation driving laser excited plasma tailored density profiles phase locking precise control shape group velocity frequency chirping particle cell simulations
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A Combined Heterotic String and Kähler Manifold Elucidation of Ordinary Energy,Dark Matter,Olbers’s Paradox and Pure Dark Energy Density of the Cosmos 认领 引用 被引量：6
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作者 Mohamed S.El Naschie 《Journal of Modern Physics》 2017年第7期1101-1118,共18页
We utilize the topological-geometrical structure imposed by the Heterotic superstring theory on spacetime in conjunction with the K3 K&auml;hler manifold to explain the mysterious nature of dark matter and its cou... We utilize the topological-geometrical structure imposed by the Heterotic superstring theory on spacetime in conjunction with the K3 K&auml;hler manifold to explain the mysterious nature of dark matter and its coupling to the pure dark energy density of the cosmos. The analogous situations in the case of a Kerr black hole as well as the redundant components of the Riemannian tensor are pointed out and the final result was found to be in complete agreement with all previous theoretical ones as well as all recent accurate measurements and cosmic observations. We conclude by commenting briefly on the Cantorian model of Zitterbewegung and the connection between Olbers’s paradox and dark energy. 展开更多
关键词 Heterotic Strings K3 Kahler Manifold Dark Matter Pure Heterotic Dark Energy Einstein’s Relativity Accelerated Cosmic Expansion Negative Gravity Fractal Spacetime E-Infinity Theory Kerr Black Holes Geometry Kaluza-Klein Theory Dvoretzky’s Theorem Empty Set Zero Set Connes Noncommutative Geometry ‘tHooft Renormalon STATE Vector Reduction Density Matrix ‘tHooft Fractal Spacetime Transfinite Cellular Automata Interpretation of Quantum Mechanics Zitterbewegung Olbers’s Dark Sky Paradox
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Ultrafast Laser Energy Density and Retinal Absorption Cross-Section Determination by Saturable Absorption Measurements 认领 引用
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作者 Alfons Penzkofer Meike Luck +1 位作者 Tilo Mathes Peter Hegemann 《Journal of Analytical Sciences, Methods and Instrumentation》 2014年第1期19-26,共8页
Laser pulse nonlinear transmission measurements through saturable absorbers of known absorption parameters allow the measurement of their energy density. On the other hand, nonlinear transmission measurements of laser... Laser pulse nonlinear transmission measurements through saturable absorbers of known absorption parameters allow the measurement of their energy density. On the other hand, nonlinear transmission measurements of laser pulses of known energy density through absorbing media allow their absorption parameter determination. The peak energy density w0P of second harmonic pulses of a mode-locked titanium sapphire laser at wavelength λP = 400 nm is determined by nonlinear energy transmission measurement TE through the dye ADS084BE (1,4-bis(9-ethyl-3-car-bazovinylene)-2-methoxy-5-(2’-ethyl-hexyloxy)-benzene) in tetrahydrofuran. TE(w0P) calibration curves are calculated for laser pulse peak energy density reading w0P from measured pulse energy transmissions TE. The ground-state absorption cross-section σP and the excited-state absorption cross-section σex at λP, and the number density N0 of the retinal Schiff base isoform RetA in pH 7.4 buffer of the blue-light adapted recombinant rhodopsin fragment of the histidine kinase rhodopsin HKR1 from Chlamydomonas reinhardtii were determined by picosecond titanium sapphire second harmonic laser pulse energy transmission measurement TE through RetA as a function of laser input peak energy density w0P. The complete absorption cross-section spectrum 展开更多
关键词 Laser Pulse Peak Energy Density Determination Ground-State Absorption Cross-Section Determination Excited-State Absorption Cross-Section Determination Saturable Absorption ADS084BE Dye Histidine Kinase Rhodopsin HKR1 Retinal Schiff Base RetA Cofactor Number Density Determination
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Crustal density structure of the southern segment of the Liaocheng-Lankao fault, China 认领 引用 被引量：1
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作者 Lei Jiang Lanbo Liu +4 位作者 Zhiping Xu Xiaoguo Deng Lipu Yang Wei Xiong Shunqiang Xu 《Geodesy and Geodynamics》 2019年第5期347-355,共9页
The 1:200,000 middle-large scale Bouguer gravity anomaly data covering the southern segment of the Liaocheng-Lankao fault(SLLF)and its vicinity are analyzed with two methods.First,the Bouguer gravity anomaly data are ... The 1:200,000 middle-large scale Bouguer gravity anomaly data covering the southern segment of the Liaocheng-Lankao fault(SLLF)and its vicinity are analyzed with two methods.First,the Bouguer gravity anomaly data are decomposed by two-dimensional(2 D)wavelet to make the family of multi-scale modes correspond with density structure at different depths.Second,a two and half dimension(2.5 D)human-computer interaction inversion of the Bouguer gravity anomaly data are conducted with the constraints provided by two deep seismic sounding profiles(DSS1 and DSS2)crossing the study area to get the crustal density profiles.Based on the integrated study,we can draw the following conclusions:1)SLLF appears to be a deep fault with almost vertical dipping and rooted into the uppermost mantle;2)In the middle to upper crust SLLF shows an clear turning patterns and segmentation features;3)In the study area the epicentral distributions of the precisely re-located small earthquakes and the historical large earthquakes have a good correspondence with the turning patterns and segmentation features of SLLF;and 4)The results of the horizontal slices from 2 D wavelet decomposition show that there are significant differences in the density structure on the two sides of the fault.A well-defined concave structure with low density exists in the upper crust of the Dongming Depression on the west side of the fault,with the concave center being estimated at a depth of about 8 km.In contrast,the upper crust on the east side presents a relative thinner pattern in depth with a bit higher density.Meanwhile,the low-density structure in the middle crust underneath the fault is presumably caused by the uplift of the upper mantle materials and their intrusion along the deep rupture system.This paper clarified the inconsistency of fault system and epicenters of small earthquakes from upper to lower crust.The results indicated that the fault system plays an important governing role to the seismicity in this area. 展开更多
关键词 Southern segment of the Liaocheng-Lankao fault(SLLF) Bouguer gravity anomalies Density structure Dongming depression Multi-scale wavelet decomposition Epicenters of small earthquakes
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Effects of grain boundary density and dislocation density on formation of adiabatic shear bands in high-strength steel 认领 引用
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作者 Yong-Zheng Yu Yang Zhang +3 位作者 Xing-Hao Li Jun-Peng Li Wei-Guo Jiang Zhong-Wu Zhang 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2026年第5期109-122,共14页
The coupling effect of grain boundary density and dislocation density on the formation mechanism of adiabatic shear band(ASB)during the dynamic failure of high-strength steel was investigated.Though thermomechanical t... The coupling effect of grain boundary density and dislocation density on the formation mechanism of adiabatic shear band(ASB)during the dynamic failure of high-strength steel was investigated.Though thermomechanical treatment,samples with different grain boundary densities(SS:0.67μm-1,1093-SS:0.57μm-1,and 1273-SS:0.24μm-1)and initial dislocation densities(SS:1.3×1015 m-2,1093-SS:8.1×1014m-2,and 1273-SS:5.5×1014m-2)were prepared to elucidate the role of grain boundary density and dislocation density on ASB evolution.Experimental results showed that at a strain rate of 3300 s-1,the high grain boundary density samples(SS and 1093-SS)exhibited higher dynamic flow stresses of 1580 and 1491 MPa,respectively,compared to the low grain boundary density sample of 1273-SS with a stress of 1411 MPa.Under lower dislocation density,the high-density grain boundary network exhibited unique inhibitory effects by preventing dislocation aggregation and entanglement and effectively hindering shear localization,thus significantly delaying dynamic recrystallization.ASB composed of recrystallized grains failed to form due to the significant reduction in the recrystallization ratio.In contrast,low grain boundary density samples exhibited shear localization,leading to the formation of an ASB of approximately 24μm in width.Further studies revealed that at a higher initial dislocation density,dislocation density has a more significant influence on ASB formation compared to grain boundary density.By contrast,the SS sample with high grain boundary density presented an ASB width of 18μm.As a result,findings demonstrate that precise regulation of grain boundary density and dislocation densities enhances the material’s resistance to dynamic recrystallization and effectively suppresses ASB formation while maintaining high flow stress,offering a promising strategy to mitigate dynamic failure in high-strength steels. 展开更多
关键词 High-strength steel Grain boundary density Dislocation density Adiabatic shear band Shear localization
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The sequestration of metal nanoparticles in the liver:A trade-off between density and degradability 认领 引用
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作者 Junjie Ma Li Zeng +14 位作者 Yaquan Liu Shunhao Wang Min Li Linlin Yao Gang Tang Ziniu Wang Jiexia Cheng Qi Wu Guangxuan Wang Chunzhen Shi Liqun Chen Runzeng Liu Jie Gao Guangbo Qu Guibin Jiang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期682-689,共8页
The widespread use and casual disposal of nanoproducts increase human exposure to nanoparticles(NPs),posing potential health risks.When coming into contact with biofluid,NPs passively move in the bloodstream and reach... The widespread use and casual disposal of nanoproducts increase human exposure to nanoparticles(NPs),posing potential health risks.When coming into contact with biofluid,NPs passively move in the bloodstream and reach target organs and cells.The nano-bio interactions,distribution,and fate of NPs are highly dependent on their physicochemical properties after direct exposure into the systemic circulation.In this study,silver nanoparticles(AgNPs)and gold nanoparticles(AuNPs)with the same size,shape,surface chemistry,and particle number but different densities were co-exposed to mice to explore their blood circulation and liver accumulation.The co-exposure avoids the individual differences in a single-material exposure model.Post-exposure,Au remained longer in the bloodstream than Ag,while 92.2%of the injected dose(%ID)of Ag accumulated in the liver compared to 78.0%for Au.Over a span of 3 to 72 h,Ag content in bloodstream increased while Au was undetectable.In the liver,the%ID of Ag sharply decreased to 9.4%,while the%ID of Au remained nearly unchanged.We proved the gradual dissociation of AgNPs into Ag ions using a fluorescent probe.Therefore,density-dependent dynamics of NPs in the blood caused greater liver accumulation of low-density Ag.However,the gradual degradation of AgNPs contributes to a high degree of distribution of Ag in the body while the AuNPs remain sequestered in the liver.This study implies that the dynamic transformation of NPs complicates their density-dependent retention,which are plausible to determine the accumulation and biological effects to the organisms. 展开更多
关键词 Metal nanoparticles Stability Density Dissolution Co-exposure Fluorescent probe
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Monotonic triaxial testing and hypoplastic modelling of calcareous sand:A focus on particle breakage and initial relative density 认领 引用
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作者 Jiarui Chen Yaolan Tang +4 位作者 Shun Wang Chunshun Zhang Wei Wei Jie Dong Congying Li 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第2期1504-1525,共22页
The stress-strain behavior of calcareous sand is significantly influencedby particle breakage(B)and initial relative density(Dri),but few constitutive models consider their combined effects.To bridge this gap,we condu... The stress-strain behavior of calcareous sand is significantly influencedby particle breakage(B)and initial relative density(Dri),but few constitutive models consider their combined effects.To bridge this gap,we conducted a series of triaxial tests on calcareous sand with varying Dri and stress paths,examining particle breakage and critical state behavior.Key findingsinclude:(1)At a constant stress ratio(η),B follows a hyperbolic relationship with mean effective stress(p'),and for a given p',B increases proportionally withη;(2)The critical state line(CSL)moves downward with increasing Dri,whereas the critical state friction angle(φcs)decreases with increasing B.Based on these findings,we propose a unifiedbreakage evolution model to quantify particle breakage in calcareous sand under various loading conditions.Integrating this model with the Normal Consolidation Line(NCL)and CSL equations,we successfully simulate the steepening of NCL and CSL slopes as B increases with the onset of particle breakage.Furthermore,we quantitatively evaluate the effect of B onφcs.Finally,within the framework of Critical State Soil Mechanics and Hypoplasticity theory,we develop a hypoplastic model incorporating B and Dri.The model is validated through strong agreement with experimental results across various initial relative densities,stress paths and drainage conditions. 展开更多
关键词 Calcareous sand Constitutive model Hypoplasticity Particle breakage Initial relative density Triaxial test
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KSSOLV-GPU 2.0:A Lightweight MATLAB Toolbox for GPU-Accelerated Plane-Wave Hybrid Functional and Spin-Polarized Density Functional Theory Calculations 认领 引用
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作者 Yehao Zeng Zhenlin Zhang +10 位作者 Zhaolong Luo Jun Gao Sheng Chen Wentiao Wu Yexuan Lin Yihong Zhang Xinming Qin Weiyi Wang Zhiwen Zhuo Shizhe Jiao Wei Hu 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2026年第2期182-196,I0169,共15页
KSSOLV(Kohn−Sham solver)is a MAT-LAB(Matrix Laboratory)toolbox de-signed for solving the Kohn-Sham density functional theory(DFT)equations by us-ing the plane-wave basis set.Leveraging the powerful capabilities of MAT... KSSOLV(Kohn−Sham solver)is a MAT-LAB(Matrix Laboratory)toolbox de-signed for solving the Kohn-Sham density functional theory(DFT)equations by us-ing the plane-wave basis set.Leveraging the powerful capabilities of MATLAB’s parallel computing toolbox and an ad-vanced,optimized calculation workflow,KSSOLV uniquely enables efficient graph-ics processing unit(GPU)acceleration,making DFT calculations accessible on standard personal computing hardware.Here,KSSOLV-GPU 2.0,as the latest release,demonstrates substantial computational gains.In benchmarks,particularly involving calculations such as hybrid functionals and spin-polar-ized systems for complex band structure analysis,KSSOLV-GPU 2.0 achieves a speedup of more than an order of magnitude compared to conventional central processing unit based im-plementations.This significant acceleration marks a pivotal advancement in performing com-plex materials simulations,making KS-DFT increasingly accessible on personal computing platforms. 展开更多
关键词 Kohn-Sham solver Density functional theory Matrix Laboratory(MATLAB) Graphics processing unit(GPU) Hybrid functional k-point sampling Spin polarization
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Thermal Responses of Spin Density and Spin Current Induced by Bogoliubov Fermi Surfaces in Proximity Superconductors 认领 引用
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作者 Yingwen Zhang Cong Xiao Xiao Li 《Chinese Physics Letters》 SCIE EI CAS CSCD 2026年第6期92-96,共5页
The emergence of Bogoliubov Fermi surfaces in s-wave proximity superconducting systems provides a unique platform for generating nontrivial spin responses in the presence of spin-orbit coupling.In this work,we investi... The emergence of Bogoliubov Fermi surfaces in s-wave proximity superconducting systems provides a unique platform for generating nontrivial spin responses in the presence of spin-orbit coupling.In this work,we investigate temperature-gradient driven responses of spin polarization and spin current in such a proximity system related to Fe(Te,Se).The interplay of in-plane magnetization,superconductivity,and nematicity gives rise to nontrivial Berry curvature and spin-related hybrid Berry curvature on the Bogoliubov Fermi surfaces,which are shown to lead to finite thermally driven nonequilibrium spin polarization and spin Nernst effect.We find that the responses are strongly enhanced by the emergence of Bogoliubov Fermi surfaces,and are linear in temperature at low temperatures,rendering a unique spintronic character of Bogoliubov Fermi surfaces. 展开更多
关键词 generating nontrivial spin responses nontrivial berry curvature thermal responses spin current bogoliubov fermi surfaces spin polarization spin density
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Analyzing Population Density Disparity in China with GIS-automated Regionalization: The Hu Line Revisited 认领 引用 被引量：5
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作者 WANG Fahui LIU Cuiling XU Yaping 《Chinese Geographical Science》 SCIE CSCD 2019年第4期541-552,共12页
The famous ’Hu Line’, proposed by Hu Huanyong in 1935, divided China into two regions(southeast and northwest) of comparable area size but drastically different in population. However, the classic Hu Line was derive... The famous ’Hu Line’, proposed by Hu Huanyong in 1935, divided China into two regions(southeast and northwest) of comparable area size but drastically different in population. However, the classic Hu Line was derived manually in absence of reliable census data and computational technologies of modern days. It has been subject to criticism of lack of scientific rigor and accuracy. This research uses a GIS-automated regionalization method, termed REDCAP(Regionalization with Dynamically Constrained Agglomerative Clustering and Partitioning), to reconstruct the demarcation line based on the 2010 county-level census data in China. The results show that the logarithmic transformation of population density is a better measure of attributive homogeneity in derived regions than density itself, and produces two regions of nearly identical area size and greater contrast in population. Specifically, the revised Hu Line by Hu Huanyong in 1990 had the southeast region with 94.4% of total population and 42.9% of total land, and our delineation line yields a southeast region with 97.4% population and 50.8% land. Therefore, the population density ratio of the two regions is 27.1 by our line, much higher than the ratio of 22.4 by the Hu Line, and thus outperforms the Hu Line in deriving regions of maximum density contrast with comparable area size. Furthermore, more regions are delineated to further advance our understanding of population distribution disparity in China. 展开更多
关键词 Hu Line regional population density disparity GIS-automated regionalization REDCAP (Regionalization with Dynamically Constrained Agglomerative Clustering and Partitioning) China
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Concealed porphyry delineation based on nonlinear three-dimensional densitydifference inversion: An example in the Beiya mine area, Western Yunnan, China 认领 引用
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作者 Jian Yang Sheng-xian Liang +3 位作者 Qiao Wang Wei Zhang Jing Guo Guo-zhong Liao 《China Geology》 CAS 2019年第3期342-353,共12页
Intermediate acid-complex rock masses with low-density characteristics are the most important prospecting sign in the Beiya area, of western Yunnan province, and provide a physical basis for good gravity exploration. ... Intermediate acid-complex rock masses with low-density characteristics are the most important prospecting sign in the Beiya area, of western Yunnan province, and provide a physical basis for good gravity exploration. It is usually difficult to obtaining solutions in connection with actual geological situations due to the ambiguity of the conventional gravity-processing results and lack of deep constraints. Thus, the three-dimensional (3D) inversion technology is considered as the main channel for reducing the number of solutions and improving the vertical resolution at the current stage. The current study starts from a model test and performs nonlinear 3D density-difference inversion called “model likelihood exploration”, which performs 3D inversion imaging and inversion of the known model while considering the topographic effects. The inversion results are highly consistent with those of the known models. Simultaneously, we consider the Beiya gold mine in Yunnan as an example. The nonlinear 3D densitydifference inversion technology, which is restricted by geological information, is explored to obtain the 3D density body structure below 5 km in the mine area, and the 3D structure of the deep and concealed rock masses are obtained using the density constraints of the intermediate-acid-complex rock masses. The results are well consistent with the surface geological masses and drilling-controlled deep geological masses. The model test and examples both show that the 3D density-difference nonlinear inversion technology can reduce inversion ambiguity, improve resolution, optimize the inversion results, and realize “transparency” in deeply concealed rock masses in ore-concentrated areas,which is useful in guiding the deep ore prospecting. 展开更多
关键词 Three-dimensional density inversion Concealed porphyry Gold deposit Mineral resources exploration engineering Beiya mine area Yunnan Province China
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EAST Overcomes Empirical Limit on Plasma Density 认领 引用
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作者 SONG Jianlan 《Bulletin of the Chinese Academy of Sciences》 2026年第1期26-27,共2页
A research team working on EAST,the Experimental Advanced Superconducting Tokamak hosted in the Institute of Plasma Physics (ASIPP)under the Hefei Institutes of Physical Science,Chinese Academy of Sciences,has broken ... A research team working on EAST,the Experimental Advanced Superconducting Tokamak hosted in the Institute of Plasma Physics (ASIPP)under the Hefei Institutes of Physical Science,Chinese Academy of Sciences,has broken through an empirical limit on plasma density in their experiment.Exactly on the first day of the year 2026,the team reported in Science Advances (http://gffzzd3cc09b8251d45dfspq66kqqxx0cv6ob9.ffgz.tsg.suse.edu.cn/10.1126/sciadv.adz3040) their progress,experimentally verifying and theoretically developing a physics model predicting the"density-free"regime. 展开更多
关键词 tokamak density free regime developing physics model plasma density advanced superconducting tokamak empirical limit physics model
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