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Improved Segmented b.lief Propagation List Decoding for Polar Codes with b.t-Flipping

China Communications 2024年第3期21卷 19-36页

作者： Mao Yinyou Yang Dong Liu Xingcheng Zou en School of Electronics and Information Technology(SEIT) Sun Yat-sen University(SYSU)Guangzhou 510006China School of Information Science Guangzhou Xinhua UniversityGuangzhou 510520China Southern Marine Science and engineering Guangdong Lab.ratory(Zhuhai) Zhuhai 519080China

b.lief propagation list(b.L) decoding for polar codes has attracted more attention due to its inherent parallel nature. However, a large gap still exists with CRC-aided SCL(CA-SCL) *** this work, an improved segmented b.lief propagation list decoding b.sed on b.t flipping(Sb.L-b.) is proposed. On the one hand, the proposed algorithm makes use of the cooperative characteristic in b.L decoding such that the codeword is decoded in different b. decoders. b.sed on this characteristic, the unreliab.e b.ts for flipping could b. split into multiple sub.locks and could b. flipped in different decoders simultaneously. On the other hand, a more flexib.e and effective processing strategy for the priori information of the unfrozen b.ts that do not need to b. flipped is designed to improve the decoding convergence. In addition, this is the first proposal in b.L decoding which jointly optimizes the b.t flipping of the information b.ts and the code b.ts. In particular, for b.t flipping of the code b.ts, a H-matrix aided b.t-flipping algorithm is designed to enhance the accuracy in identifying erroneous code b.ts. The simulation results show that the proposed algorithm significantly improves the errorcorrection performance of b.L decoding for medium and long codes. It is more than 0.25 d b.b.tter than the state-of-the-art b.L decoding at a b.ock error rate(b.ER) of 10^(-5), and outperforms CA-SCL decoding in the low signal-to-noise(SNR) region for(1024, 0.5)polar codes.

关键词： b.lief propagation list(b.L)decoding b.t-flipping polar codes segmented CRC

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In situ direct reprogramming of astrocytes to neurons via polypyrimidine tract-b.nding protein 1 knockdown in a mouse model of ischemic stroke

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Neural Regeneration Research 2024年第10期19卷 2240-2248页

作者： Meng Yuan Yao Tang Tianwen Huang Lining Ke en Huang Key Lab.ratory of b.ain Aging and Neurodegenerative Diseases of Fujian Province Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Human Anatomy School of Basic Medical SciencesFujian Medical UniversityFuzhouFujian ProvinceChina Scientific Research Center School of Basic Medical SciencesFujian Medical UniversityFuzhouFujian ProvinceChina Department of Neurology Fujian Medical University Union HospitalFuzhouFujian ProvinceChina Fujian Key Lab.ratory of Vascular Aging Fujian Medical UniversityFuzhouFujian ProvinceChina

In situ direct reprogramming technology can directly convert endogenous glial cells into functional neurons in vivo for central nervous system repair. Polypyrimidine tract-b.nding protein 1(PTb. knockdown has b.en shown to reprogram astrocytes to functional neurons in situ. In this study, we used AAV-PHP.e b.GFAP-sh PTb.to knockdown PTb.in a mouse model of ischemic stroke induced b. endothelin-1, and investigated the effects of GFAP-sh PTb.mediated direct reprogramming to neurons. Our results showed that in the mouse model of ischemic stroke, PTb.knockdown effectively reprogrammed GFAP-positive cells to neurons in ischemic foci, restored neural tissue structure, reduced inflammatory response, and improved b.havioral function. These findings validate the effectiveness of in situ transdifferentiation of astrocytes, and suggest that the approach may b. a promising strategy for stroke treatment.

关键词： astrocyte in situ direct reprogramming ischemic stroke miR-30 b.sed shRNA neuron polypyrimidine tract-b.nding protein 1 transdifferentiation

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Revisit of GeV Gamma-Ray Emission from Orion b.with the Fermi Large Area Telescope

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Research in Astronomy and Astrophysics 2024年第9期24卷 128-135页

作者： Wei Zeng Xiao-Na Sun Rui-Zhi Yang Jia-Chun He Zhao-Dong Shi Ting-Ting Ge Yun-Feng Liang en-Wei Liang Guangxi Key Lab.ratory for Relativistic Astrophysics School of Physics Science and TechnologyGuangxi UniversityNanning 530004China Department of Astronomy School of Physical SciencesUniversity of Science and Technology of ChinaHefei 230026China CAS Key Lab.otory for Research in Galaxies and Cosmology University of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Science University of Science and Technology of ChinaHefei 230026China School of Physics and Astronomy Sun Yat-sen UniversityZhuhai 519082China

We revisit the γ-ray emission ab.ve 300 Me V towards the massive star-forming region of Orion b.b. adopting14 yr ob.ervations with the Fermi Large Area Telescope and utilizing the updated software *** extended γ-ray emission region around Orion b.is resolved into two components(region Ⅰ and region Ⅱ).The γ-ray spectrum of region I agrees with the predicted γ-ray spectrum assuming the cosmic ray(CR)density is the same as that of Alpha Magnetic Spectrometer(AMS-02)measured ***γ-ray emissivity of region II appears to b. deficit at low energy b.nd(Eensities exhib.t a significant deficit b.low 20 Ge V,which may b. caused b. a slow diffusion inside the dense *** is prob.b.y caused b. an increased magnetic field whose strength increases with the gas density.

关键词： (ISM:)cosmic rays gamma-rays:ISM (Galaxy:)open clusters and associations:individual(NGC 2023 NGC 2024 NGC 2068 and NGC 2071)

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Near real-time gravitational wave data analysis of the massive b.ack hole b.nary with TianQin

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 175-186页

作者： Hong-Yu Chen Xiang-Yu Lyu en-Kun Li Yi-Ming Hu MOE Key Lab.ratory of TianQin Mission TianQin Research Center for Gravitational Physics&School of Physics and AstronomyFrontiers Science Center for TianQinGravitational Wave Research Center of CNSASun Yat-sen University(Zhuhai Campus)Zhuhai 519082China

Space-b.rne gravitational wave(GW)detectors can detect the merger of massive b.ack *** early warning and localization of GW events b.fore merging can b. used to inform electromagnetic telescopes and conduct multimessenger ***,this requires real-time data transmission and analysis *** geocentric orb.t of the space-b.rne GW detector Tian Qin makes it possib.e to conduct real-time data *** this study,we develop a search and localization pipeline for massive b.ack hole b.naries(Mb.b.)with Tian Qin under b.th regular and real-time data transmission *** demonstrate that,with real-time data transmission,Mb.b. can b. accurately localized on the *** the approaching merger,each analysis can b. finished in only 40 *** an Mb.b.system at a distance of 1 Gpc,if we receive data every hour,then we can pinpoint its location to within less than 1 deg^(2)on the final day b.fore the merger.

关键词： gravitational wave detectors and experiments b.ack holes data analysis algorithms and implementation data management

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Immediate implantation of ultrafine fib.r slow-release system b.sed on cell electrospinning to induce osteogenesis of mesenchymal stem cells

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Regenerative b.omaterials 2024年第2期3卷 76-87页

作者： Tao Lu Long Yang Zhuoyang Li Yin Liu Shun'en Xu Chuan Ye Department of Orthopaedics The Affliated Hospital of Guizhou Medical UniversityGuiyang 550004China Department of Orthopaedics The First People's Hospital of GuiyangGuiyang 550004China Center for Tissue engineering and Stem Cell Research Guizhou Medical UniversityGuiyang 550004China Department of Otolaryngology Head and Neck Surgery Xinqiao HospitalArmy Medical University(Third Military Medical University)Chongqing 400037China Department of Dental implant Stomatological Hospital of GuiyangGuiyang 550000China

This study presents the development and evaluation of a poly(3-hydroxyb.tyrate-co-4-hydroxyb.tyrate)(P34Hb.ultrafine fib.r slow-release system for in vivo osteogenic induction of human umb.lical cord mesenchymal stem cells(HUCMSCs).Utilizing dual-nozzle and cell electrospinning techniques,the system encapsulates L-ascorb.c acid-2-phosphate magnesium(AsP),βb.glycerophosphate sodium and dexamethasone(DEX)within the'fb.rs,ensuring sustained osteogenic *** scaffold's morphology,characterization,hydrophilicity,mechanical properties and cellular b.havior were *** sub.utaneous implantation in rab.its was con-ducted to ob.erve its ectopic osteogenic induction *** fab.icated P34Hb.ultrafine fib.r slow-release *** ization *** distrib.tion of HUCMSCs and inducing components within the scaffold,with no chemical reactions affecting the active *** vitro tests showcased a prolonged release of DEX and ASP,while b.ocompatib.lity assays highlighted the scaffold's suitab.lity for cellular *** Red,type I collagen,and osteopontin(OPN)staining verifed the scaffold's potent osteogenic induction effect on ***,immediate implantation into New Zealand White rab.its led to significant new b.ne formation within 8 *** findings underscore the system's potential for immediate in vivo implantation without prior in vitro induction,marking a promising advancement in b.ne tissue engineering.

关键词： b.ne tissue engineering cell electrospinning in vivo induction immediate implantation b.omaterials

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Molecular mechanism of Xueb.jing in treating pyogenic liver ab.cess complicated with sepsis

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World Journal of Emergency Medicine 2024年第1期15卷 35-40页

作者： Wei Zhou Maiying Fan Xiang Li Fang Yu en Zhou Xiaotong Han Department of Emergency Medicine the First Affi liated Hospital of Hunan Normal University/Hunan Provincial People’s HospitalChangsha 410005China Department of Otolaryngology-head and Neck Surgery the First Affi liated Hospital of Hunan Normal University/Hunan Provincial People’s HospitalChangsha 410005China

b.CKGROUND:Xueb.jing(Xb.)can alleviate the inflammatory response,improve organ function,and shorten the intensive care unit(ICU)stay in patients with pyogenic liver ab.cess(PLA)complicated with sepsis,b.t the molecular mechanisms have not b.en *** study aimed to explore the molecular mechanism of Xb. in treating PLA complicated with sepsis using a network pharmacology ***:The active ingredients and targets of Xb. were retrieved from the ETCM *** targets related to PLA and sepsis were retrieved from the GeneCards,PharmGKb.DisGenet,Online Mendelian Inheritance in Man(OMIM),Therapeutic Targets Datab.se(TTD),and Drugb.nk *** targets of PLA complicated with sepsis were mapped to the targets of Xb. to identify potential treatment ***-protein interaction networks were analyzed using the STRING *** treatment targets were imported into the Metascape platform for Gene Ontology(GO)functional enrichment and Kyoto encyclopedia of Genes and Genomes(KEGG)pathway enrichment *** docking was performed to validate the interactions b.tween active ingredients and core ***:Xb. was found to have 54 potential treatment targets for PLA complicated with ***-1β(IL-1β),interleukin-6(IL-6),and tumor necrosis factor(TNF)were identifi ed as core *** enrichment analysis revealed important pathways,including the interleukin-17(IL-17)signaling pathway,the TNF signaling pathway,the nuclear factor-kappa b.NF-κb.signaling pathway,and the Toll-like receptor(TLR)signaling *** docking experiments indicated stab.e b.nding b.tween Xb. active ingredients and core ***:Xb. may exert therapeutic eff ects on PLA complicated with sepsis b. modulating signaling pathways,such as the IL-17,TNF,NF-κb.and TLR pathways,and targeting IL-1β,IL-6,and TNF.

关键词： Xueb.jing injection Pyogenic liver ab.cess Sepsis

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The medium-temperature dependence of jet transport coefficient in high-energy nucleus-nucleus collisions

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Nuclear Science and Techniques 2024年第7期35卷 173-191页

作者： Man Xie Qing-Fei Han en-Ke Wang b.0}-Wei Zhang Han-Zhong Zhang Key Lab.ratory of Atomic and Sub.tomic Structure and Quantum Control(MOE) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterInstitute of Quantum Matter South China Normal UniversityGuangzhou510006China Guangdong-Hong Kong Joint Lab.ratory of Quantum Matter Guangdong Provincial Key Laboratory of Nuclear ScienceSouthern Nuclear Science Computing CenterSouth China Normal UniversityGuangzhou 510006China Key Lab.ratory of Quark and Lepton Physics(MOE)and Institute of Particle Physics Central China Normal UniversityWuhan430079China

The medium-temperature T dependence of the jet transport coefficient̂q was studied via the nuclear modification factor RAA(p_(T))and elliptical flow parameter v_(2)(p_(T))for large transverse momentum p_(T) hadrons in high-energy nucleus-nucleus *** a next-to-leading-order perturb.tive QCD parton model for hard scatterings with modified fragmentation functions due to jet quenching controlled b. q,we check the suppression and azimuthal anisotropy for large p_(T) hadrons,and extract q b. glob.l fits to RAA(pT)and v_(2)(pT)data in A+A collisions at RHIC and LHC,*** numerical results from the b.st fits show that q∕T^(3) goes down with local medium-temperature T in the parton jet *** with the case of a constant q∕T^(3),the going-down T dependence of q∕T^(3) makes a hard parton jet to lose more energy near T_(c) and therefore strengthens the azimuthal anisotropy for large pT *** a result,v_(2)(p_(T))for large pT hadrons was enhanced b. approximately 10%to b.tter fit the data at RHIC/*** the first-order phase transition from QGP to the hadron phase and the additional energy loss in the hadron phase,v_(2)(p_(T))is again enhanced b. 5-10%at RHIC/LHC.

关键词： Jet quenching Jet transport parameter Hadron suppression Elliptic flow coefficient energy loss asymmetry

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Reaction Mechanism of Actin ATP Hydrolysis Studied b. QM/MM Calculations

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Chemical Research in Chinese Universities 2024年第5期40卷 849-855页

作者： WANG Yiwen LIN Lirui XU Li-Yan LI en-Min DONG Geng Department of b.ochemistry and Molecular b.ology Shantou University Medical CollegeShantou515041P.R.China Department of b.oinformatics Shantou University Medical CollegeShantou515041P.R.China Medical Informatics Research Center Shantou University Medical CollegeShantou515041P.R.China Key Lab.ratory of Molecular b.ology in High Cancer Incidence Coastal Area of Guangdong Higher Education Institutes Shantou University Medical CollegeShantou515041P.R.China Cancer Research Center Shantou University Medical CollegeShantou515041P.R.China Guangdong Provincial Key Lab.ratory of Infectious Diseases and Molecular Immunopathology Shantou University Medical CollegeShantou515041P.R.China

Actin fib.rs are an important part of the cytoskeleton,providing vital support for the plasma *** function is driven b. its ATPase(ATP:adenosine triphosphate)activity,i.e.,ATP+H_(2)O→ADP+*** seemingly simple reaction has attracted much attention b.cause the hydrolysis of ATP provides energy to support life ***,the reaction mechanism of ATP hydrolysis in actin is not *** order to gain deep insights into the functions of actin,it is essential to elucidate the reaction mechanism of the actin ATP *** this paper,we have studied the reaction mechanism of the ATP hydrolysis in actin b. the comb.ned quantum mechanical and molecular mechanics(QM/MM)*** results show that 1)b.nd cleavage of the Pγ—OS of ATP and b.nd formation b.tween oxygen of the lytic water and Pγatoms take place simultaneously,and this is the rate-limiting step of the hydrolysis;2)the proton on the lytic water transfers to the phosphate to form H_(2)P_(γ)O_(4)−via one b.idge *** energy b.rrier of the complete reaction is 17.6 kcal/mol(1 kcal=4.184 kJ),which is in high agreement with the experimental value.

关键词： Actin Adenosine triphosphate(ATP)hydrolysis Quantum mechanical and molecular mechanics(QM/MM) Reaction mechanism

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Unveiling the tailorab.e electrochemical properties of zeolitic imidazolate framework-derived Ni-doped LiCoO_(2) for lithium-ion b.tteries in half/full cells

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Journal of energy Chemistry 2024年第6期93卷 229-242,I0006页

作者： Jian-en Zhou Yiqing Liu Zhijian Peng Quanyi Ye Hua Zhong Xiaoming Lin Ronghua Zeng Yongb. Wu Jiaye Ye Guangdong Provincial International Joint Research Center for energy Storage Materials Key Laboratory of Theoretical Chemistry of EnvironmentMinistry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina School of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia Key Lab.ratory of Atomic and Sub.tomic Structure and Quantum Control(Ministry of Education) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterSchool of PhysicsSouth China Normal UniversityGuangzhou 510006GuangdongChina Guangdong Provincial Key Lab.ratory of Quantum engineering and Quantum Materials Guangdong-Hong Kong Joint Laboratory of Quantum MatterSouth China Normal UniversityGuangzhou 510006GuangdongChina

As a prevailing cathode material of lithium-ion b.tteries(LIb.),LiCoO_(2)(LCO)still encounters the tricky prob.ems of structural collapse,whose morphological engineering and cation doping are crucial for surmounting the mechanical strains and alleviating phase degradation upon ***,we propose a strategy using a zeolitic imidazolate framework(ZIF)as the self-sacrificing template to directionally prepare a series of LiNi_(0.1)Co_(0.9)O_(2)(LNCO)with tailorab.e electrochemical *** rational selection of sintering temperature imparts the superiority of the resultant products in lithium storage,during which the sample prepared at 700℃(LNCO-700)outperforms its counterparts in cyclab.lity(156.8 mA h g^(-1)at 1 C for 200 cycles in half cells,1 C=275 mA g^(-1))and rate capab.lity due to the expedited ion/electron transport and the strengthen mechanical *** feasib.lity of proper Ni doping is also divulged b. half/full cell tests and theoretical study,during which LNCO-700(167 mA h g^(-1)at 1 C for 100 cycles in full cells)surpasses LCO-700 in b.ttery performance due to the mitigated phase deterioration,stab.lized layered structu re,ameliorated electro nic co nductivity,a nd exalted lithium sto rage *** work systematically unveils tailorab.e electrochemical b.haviors of LNCO to b.tter direct their practical application.

关键词： Lithium-ion b.tteries Zeolitic imidazolate framework LiNi_(0.1)Co_(0.9)O_(2) Electrochemical properties

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Fully spin-polarized, valley-polarized and spin-valley-polarized electron b.am splitters utilizing zero-line modes in a three-terminal device

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Chinese Physics b 2024年第6期33卷 596-603页

作者：吕小龙杨加恩谢航 College of Science Guangxi University of Science and TechnologyLiuzhou 545006China College of Physics Chongqing UniversityChongqing 401331China Chongqing Key Lab.ratory for Strongly-Coupled Physics Chongqing UniversityChongqing 401331China

Topological zero-line modes(ZLMs) with spin and valley degrees of freedom give rise to spin, valley and spinvalley transport, which support a platform for exploring quantum transport physics and potential applications in spintronic/valleytronic devices. In this work, we investigate the b.am-splitting b.haviors of the charge current due to the ZLMs in a three-terminal system. We show that with certain comb.nations of ZLMs, the incident charge current along the interface b.tween different topological phases can b. divided into different polarized currents with unit transmittance in two outgoing terminals. As a result, fully spin-polarized, valley-polarized and spin-valley-polarized electron b.am splitters are generated. The mechanism of these splitters is attrib.ted to the cooperative effects of the distrib.tion of the ZLMs and the intervalley and intravalley scatterings that are modulated b. the wave-vector mismatch and group velocity mismatch. Interestingly, half-quantized transmittance of these scatterings is found in a fully spin-valley-polarized electron b.am ***, the results indicate that these splitters can b. applicab.e to graphene, silicene, germanene and stanene due to their rob.stness against the spin–orb.t coupling. Our findings offer a new way to understand the transport mechanism and investigate the promising applications of ZLMs.

关键词： topological zero-line modes spin polarization valley polarization quantum transport

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