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Improving the Short-Range Precipitation Forecast of Numerical Weather Prediction through a Deep Learning-Based Mask Approach

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Advances in Atmospheric sciences 2024年第8期41卷 1601-1613页

作者： Jiaqi ZHENG Qing LING Jia LI Yerong FENG School of Computer science and Engineering/Guangdong Provincial Key Laboratory of computational science Sun Yat-Sen UniversityGuangzhou 510006China School of Mathematics Sun Yat-Sen UniversityGuangzhou 510275China Guangzhou institute of Tropical and Marine Meteorology/Guangdong Provincial Key Laboratory of Regional Numerical Weather Prediction Guangzhou 510641China shenzhen institute of Meteorological Innovation Shenzhen 518038China

Due to various technical issues,existing numerical weather prediction(NWP)models often perform poorly at forecasting rainfall in the first several *** correct the bias of an NWP model and improve the accuracy of short-range precipitation forecasting,we propose a deep learning-based approach called UNet Mask,which combines NWP forecasts with the output of a convolutional neural network called *** UNet Mask involves training the UNet on historical data from the NWP model and gridded rainfall observations for 6-hour precipitation *** overlap of the UNet output and the NWP forecasts at the same rainfall threshold yields a *** UNet Mask blends the UNet output and the NWP forecasts by taking the maximum between them and passing through the mask,which provides the corrected 6-hour rainfall *** evaluated UNet Mask on a test set and in real-time *** results showed that UNet Mask outperforms the NWP model in 6-hour precipitation prediction by reducing the FAR and improving CSI *** tests also showed that different small rainfall thresholds applied to the UNet and the NWP model have different effects on UNet Mask's forecast *** study shows that UNet Mask is a promising approach for improving rainfall forecasting of NWP models.

关键词： deep learning numerical weather prediction(NWP) 6-hour quantitative precipitation forecast

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High-Order Low-Dissipation Shock-Resolving TENO-THINC Schemes for Hyperbolic Conservation Laws

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Communications in computational Physics 2023年第9期34卷 1043-1078页

作者： Shinichi Takagi Hiro Wakimura Lin Fu Feng Xiao Department of Mechanical Engineering Tokyo Institute of Technology2-12-1 Ookayama Meguro-kuTokyo152-8550Japan Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Department of Mathematics The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina HKUST shenzhen-Hong Kong Collaborative Innovation research institute FutianShenzhenChina shenzhen research institute The Hong Kong University of Science and TechnologyShenzhenChina

While the recently proposed TENO(targeted essentially non-oscillatory)schemes[Fu et al.,Journal of computational Physics 305(2016):333-359]exhibit better performance than the classical WENO(weighted essentially non-oscillatory)schemes with the same accuracy order,there is still a room for further improvement,e.g.,the physical discontinuities may be significantly smeared by the excessive numerical dissipation due to the enforcement of the ENO property after a long-time *** recently,a new fifth-order TENO5-THINC scheme is proposed by coupling the TENO5 scheme with a non-polynomial THINC(tangent of hyperbola for interface capturing)scheme based on a parameter-free discontinuity *** novelty originates from the fact that the new strategy locates the discontinuities accurately and deploys the jump-like THINC reconstruction scheme for resolving the discontinuities with a sub-cell resolution,instead of enforcing the ENO *** new scheme successfully leverages the excellent wave-resolution property of standard TENO schemes for smooth and under-resolved continuous scales and the discontinuity-resolving capability of THINC for reconstructing genuine *** this work,we further develop the low-dissipation discontinuity-resolving very-high-order TENO-THINC reconstruction schemes for hyperbolic conservation laws by proposing tailored coupling *** loss of generality,the six-and eight-point TENO-THINC schemes are developed,and the explicit formulas are given as well as the built-in *** on a set of critical benchmark simulations,the newly proposed schemes show ***,***,*** and ***/***.,34(2023),pp.1043-1078 significantly lower numerical dissipation when compared to the counterpart TENO schemes without sacrificing numerical *** presented numerical results represent the state-of-the-art in the literature and can serve as references for future algorithm development.

关键词： TENO THINC WENO high-order numerical schemes low-dissipation schemes compressible flows

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Manipulating Nonsequential Double Ionization of Argon Atoms via Orthogonal Two-Color Field

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Chinese Physics Letters 2022年第9期39卷 10-16页

作者： Yingbin Li Lingling Qin Aihua Liu Ke Zhang Qingbin Tang Chunyang Zhai Jingkun Xu Shi Chen Benhai Yu Jing Chen College of Physics and Electronic Engineering Xinyang Normal UniversityXinyang 464000China institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China School of Physics and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Center for applied Physics and Technology HEDPSand School of PhysicsPeking UniversityBeijing 100871China institute of applied Physics and computational Mathematics Beijing 100088China shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Advanced Material Diagnostic Technologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118China State Key Laboratory of Transient Optics and Photonics Chinese Academy of SciencesXi’an 710119China

Using a three-dimensional classical ensemble model,we investigate the dependence of relative frequency and relative initial phase for nonsequential double ionization(NSDI)of atoms driven by orthogonal two-color(OTC)*** findings reveal that the NSDI probability is clearly dependent on the relative initial phase of OTC fields at different relative *** inversion analysis results indicate that adjusting the relative frequency of OTC fields helps control returning probability and flight time of the first ***,manipulating the relative frequency at the same relative initial phases can vary the revisit time of the recolliding electron,leading that the emission direction of Ar^(2+)ions is explicitly dependent on the relative frequency.

关键词： initial ensemble finding

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Dual-Functional Lithiophilic/Sulfiphilic Binary-Metal Selenide Quantum Dots Toward High-Performance Li-S Full Batteries

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Nano-Micro Letters 2023年第5期15卷 169-186页

作者： Youzhang Huang Liang Lin Yinggan Zhang Lie Liu Baisheng Sa Jie Lin Laisen Wang Dong-Liang Peng Qingshui Xie State Key Lab for Physical Chemistry of Solid Surfaces Fujian Key Laboratory of Surface and Interface Engineering for High Performance MaterialsCollege of MaterialsXiamen UniversityXiamen 361005People’s Republic of China shenzhen research institute of Xiamen University Shenzhen 518000People’s Republic of China College of Materials science and Engineering Multiscale Computational Materials FacilityFuzhou UniversityFuzhou 350100People’s Republic of China

The commercial viability of lithium-sulfur batteries is still challenged by the notorious lithium polysulfides(Li PSs)shuttle effect on the sulfur cathode and uncontrollable Li dendrites growth on the Li ***,a bi-service host with Co-Fe binary-metal selenide quantum dots embedded in three-dimensional inverse opal structured nitrogen-doped carbon skeleton(3DIO FCSe-QDs@NC)is elaborately designed for both sulfur cathode and Li metal *** highly dispersed FCSe-QDs with superb adsorptive-catalytic properties can effectively immobilize the soluble Li PSs and improve diffusion-conversion kinetics to mitigate the polysulfide-shutting ***,the 3D-ordered porous networks integrated with abundant lithophilic sites can accomplish uniform Li deposition and homogeneous Li-ion flux for suppressing the growth of *** advantage of these merits,the assembled Li-S full batteries with 3DIO FCSe-QDs@NC host exhibit excellent rate performance and stable cycling ability(a low decay rate of 0.014%over 2,000 cycles at 2C).Remarkably,a promising areal capacity of 8.41 mAh cm^(-2)can be achieved at the sulfur loading up to 8.50 mg cm^(-2)with an ultra-low electrolyte/sulfur ratio of 4.1μL mg^(-1).This work paves the bi-serve host design from systematic experimental and theoretical analysis,which provides a viable avenue to solve the challenges of both sulfur and Li electrodes for practical Li-S full batteries.

关键词： Dual-functional host Fe_(2)CoSe_(4)quantum dots Shuttle effect Dendrite-free Li anode Li-S full batteries

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Multilevel Constrained Pressure-Temperature Residual Preconditioners for Large-Scale Non-Isothermal Reservoir Simulation via Restricted Additive Schwarz Algorithms

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Communications in computational Physics 2023年第8期34卷 837-868页

作者： Mei Zhang Haijian Yang Chao Yang Shuyu Sun School of Mathematics Hunan UniversityChangshaHunan410082P.R.China shenzhen research institute Hunan UniversityShenzhen518000PR China School of Mathematical sciences Peking UniversityBeijing100871P.R.China computational Transport Phenomena Laboratory Physical Science and Engineering DivisionKing Abdullah University of Science and TechnologyThuwal23955-6900Saudi Arabia

The industry-standard constrained pressure residual(CPR)algorithm is often able to effectively improve the robustness behavior and the convergence speed of linear iterations for isothermal reservoir *** this paper,we present and study an improved extension of CPR to the constrained pressure-temperature residual(CPTR)version for non-isothermal reservoir problems in heterogeneous porous *** the proposed preconditioner,the corresponding approximations for the inverse of matrices are computed under a domain decomposition framework by using the restricted additive Schwarz(RAS)algorithm,to equally deal with the coupled thermalpressure-saturation reservoir system and highly exploit the parallelism of supercomputer ***,we introduce and develop a family of multilevel CPTR preconditioners with suitable coarse grid corrections,to further improve the applicability of this two-stage preconditioner for large-scale *** results for strong heterogeneous flow problems show that the new approach can dramatically improve the convergence of linear iterations,and demonstrate the superiority of CPTR over the commonly used RAS *** parallel scalability of the non-isothermal reservoir simulator is also studied versus a supercomputer with tens of thousands of processors.

关键词： Thermal reservoir simulation porous media preconditioning restricted additive Schwarz algorithm strong and weak scalability

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Emergent symmetry in quantum phase transition:From deconfined quantum critical point to gapless quantum spin liquid

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science Bulletin 2024年第2期69卷 190-196页

作者： Wen-Yuan Liu Shou-Shu Gong Wei-Qiang Chen Zheng-Cheng Gu Department of Physics The Chinese University of Hong KongHong KongChina Division of Chemistry and Chemical Engineering California Institute of TechnologyPasadena CA 91125USA School of Physical sciences Great Bay UniversityDongguan 523000China Great Bay institute for Advanced Study Dongguan 523000China Department of Physics and shenzhen institute for Quantum science and Engineering Southern University of Science and TechnologyShenzhen 518055China shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and TechnologyShenzhen 518055China

The emergence of exotic quantum phenomena in frustrated magnets is rapidly driving the development of quantum many-body physics,raising fundamental questions on the nature of quantum phase *** we unveil the behaviour of emergent symmetry involving two extraordinarily representative phenomena,i.e.,the deconfined quantum critical point(DQCP)and the quantum spin liquid(QSL)*** large-scale tensor network simulations,we study a spatially anisotropic spin-1/2 square-lattice frustrated antiferromagnetic(AFM)model,namely the J1x-J1y-J2 model,which contains anisotropic nearestneighbor couplings J1x,J1y and the next nearest neighbor coupling *** small J1y/J1x,by tuning J2,a direct continuous transition between the AFM and valence bond solid phase is *** growing J1y/J1x,a gapless QSL phase gradually emerges between the AFM and VBS *** observe an emergent O(4)symmetry along the AFM–VBS transition line,which is consistent with the prediction of DQCP *** surprisingly,we find that such an emergent O(4)symmetry holds for the whole QSL–VBS transition line as *** findings reveal the intrinsic relationship between the QSL and DQCP from categorical symmetry point of view,and strongly constrain the quantum field theory description of the QSL *** phase diagram and critical exponents presented in this paper are of direct relevance to future experiments on frustrated magnets and cold atom systems.

关键词： Tensor network Quantum phase transition Emergent symmetry Quantum spin liquid Deconfined quantum critical point Anisotropic

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High-Precision Fast Direction-of-Arrival Estimation Method for Planar Array

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Space(science & Technology) 2023年第1期3卷 150-153页

作者： Shuai Li Lei Li Bo Liu Yihao Song Ming Li Jie Ren Wenting Jiang institute of Telecommunication and Navigation Satellites China Academy of Space TechnologyBeijing 100094China Innovation Center of Satellite Communication System CNSABeijing 100094China School of science and Engineering The Chinese University of Hong KongShenzhenand Shenzhen Research Institute of Big DataShenzhen 518172China

The multiple signal classification method for direction-of-arrival estimation is widely applied in practical ***,the multiple signal classification method with planar array requires 2-dimensional on-grid spectrum searches,which would lead to the grid mismatch and high computational ***,a high-precision fast direction-of-arrival estimation method for planar array is *** the proposed method,a 2-stage grid search approach over the 2-dimensional spectrum is firstly applied to obtain a quick coarse estimation of direction of ***,the estimation of higher precision is achieved via a quadratic surface fitting *** results verified the effectiveness of the proposed method.

关键词： complexity estimation planar

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Kinectin 1 promotes the growth of triple-negative breast cancer via directly co-activating NF-kappaB/p65 and enhancing its transcriptional activity

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Signal Transduction and Targeted Therapy 2021年第8期6卷 2472-2483页

作者： Lin Gao Shanze Chen Malin Hong Wenbin Zhou Bilan Wang Junying Qiu Jinquan Xia Pan Zhao Li Fu Jigang Wang Yong Dai Ni Xie Qinhe Yang Hsien-Da Huang Xiang Gao Chang Zou Department of Clinical Medical research Center The Second Clinical Medical CollegeJinan University(Shenzhen Peopled Hospital)The First Affiliated Hospital of Southern University of Science and TechnologyShenzhenGuangdongPR China Integrated Chinese and Western Medicine Postdoctoral research Station Jinan UniversityGuangzhouGuangdongPR China Department of Respiratory and Critical Care Medicine First Affiliated Hospital of Southern University of Science and TechnologyThe Second Clinical Medical CollegeJinan University(Shenzhen Peopled Hospital)Shenzhen Institute of Respiratory DiseasesShenzhenGuangdongPR China shenzhen Public Service Platform on Tumor Precision Medicine and Molecular Diagnosis the Second Clinical Medical CollegeJinan University(Shenzhen People's Hospital)ShenzhenGuangdongPR China Department of Pharmacy West China Second University Hospital of Sichuan UniversityChengduPR China Guangdong Provincial Key Laboratory of Regional Immunity and Diseases Department of Pharmacology and International Cancer CenterShenzhen University Health Science CenterShenzhenGuangdongChina Department of Integrated Chinese and Western Medicine Jinan UniversityGuangzhouGuangdongPR China School of Life and Health sciences The Chinese University of Kong HongShenzhenChina Warshel institute for computational Biology The Chinese University of HongKongShenzhenChina Department of Neurosurgery State Key Laboratory of BiotherapyWest China HospitalSichuan UniversityChengduPR China

Triple-negative breast cancer(TNBC)is the most challenging subtype of breast *** endeavor has been made to explore the molecular biology basis of ***,we reported a novel function of factor Kinectin 1(KTN1)as a carcinogenic promoter in ***1 expression in TNBC was increased compared with adjacent tissues or luminal or Her2 subtypes of breast cancer,and TNBC patients with high KTN1 expression have poor *** functional studies,knockdown of KTN1 inhibited the proliferation and invasiveness of TNBC both in vitro and in vivo,while overexpression of KTN1 promoted cancer cell proliferation and ***-seq analysis revealed that the interaction of cytokine-cytokine receptor,particularly CXCL8 gene,was upregulated by KTN1,which was supported by the further ***8 depletion inhibited the tumorigenesis and progression of ***,rescue experiments validated that KTN1-mediated cell growth acceleration in TNBC was dependent on CXCL8 both in vitro and in ***,it was found that KTN1 enhanced the phosphorylation of NF-κB/p65 protein at Ser536 site,and specifically bound to NF-κB/p65 protein in the nucleus and cytoplasm of ***,the transcription of CXCL8 gene was directly upregulated by the complex of KTN1 and NF-κB/p65 *** together,our results elucidated a novel mechanism of KTN1 gene in TNBC tumorigenesis and ***1 may be a potential molecular target for the development of TNBC treatment.

关键词： inhibited breast cancer

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A novel computational model for isotropic interfacial energies in multicomponent alloys and its coupling with phase-field model with finite interface dissipation

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Journal of Materials science & Technology 2023年第2期133卷 111-122页

作者： Shenglan Yang Jing Zhong Jiong Wang Jianbao Gao Qian Li Lijun Zhang State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China National Engineering research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China shenzhen research institute Central South UniversityShenzhen 518057China

In this work,a novel computational model for the description of the temperature-and composition-dependent isotropic interfacial energy in multicomponent alloys was first developed in the framework of the CALculation of PHAse Diagram(CALPHAD)approach and implemented in a home-made *** linking to the open-source code for interfacial energy calculation in alloys,OpenIEC,the databases for isotropicγ/liquid andγ/γ’interfacial energies in Ni-Al,Ni-Cr,Al-Cr,and Ni-Al-Cr systems were then efficiently *** that,a direct coupling strategy between the current CALPHAD interfacial en-ergy database and the phase-field model with finite interface dissipation was proposed and applied to three-dimensional(3-D)phase-field simulations of the primaryγdendritic growth in both Ni-Al and Ni-Al-Cr alloys during isothermal *** effect of the interfacial energy on the morphology,tip growth rate,and partitioning coefficients in primaryγdendrites of binary Ni-Al and ternary Ni-Al-Cr alloys was investigated by comprehensively comparing the phase-filed simulation results using the composition-/temperature-dependent interfacial energies with those using the constant *** is an-ticipated that the presently developed CALPHAD model for interfacial energy is of general validity for different multicom ponent alloys and should be integrated with the phase-field model for quantitative simulation of their microstructure evolution.

关键词： Interfacial energy CALPHAD OpenIEC Phase-field simulation Dendritic solidification

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Corrosion and in vitro cytocompatibility investigation on the designed Mg-Zn-Ag metallic glasses for biomedical application

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Journal of Magnesium and Alloys 2024年第4期12卷 1566-1580页

作者： Jian Wang Lingzhong Meng Weixin Xie Chen Ji Ronghua Wang Pinghu Zhang Liling Jin Liyuan Sheng Yufeng Zheng School of Mechanical Engineering Yangzhou UniversityYangzhou225127China Department of Materials science and Engineering Seoul National UniversitySeoulSouth Korea Huizhou Port Customs Huizhou516081China Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases Institute of Translational MedicineMedical CollegeYangzhou UniversityYangzhou225009China Center for research in computational Thermochemistry(CRCT) Department of Chemical EngineeringEcole polytechnique de MontréalMontréalQuébecH3C 3A7Canada shenzhen institute Peking UniversityShenzhen 518057China PKU-HKUST shenzhen-HongKong Institution Shenzhen518057China

In the present work,seven Mg-Zn-Ag alloys with the nominal composition of Mg_(96-x)Zn_(x)Ag_(4)(x=17,20,23,26,29,32,35 in at.%)were prepared by induction melting and single-roller *** X-ray diffraction(XRD)analyses indicate the metallic glasses with three composition of Mg_(73)Zn_(23)Ag_(4),Mg_(70)Zn_(26)Ag_(4),and Mg_(67)Zn_(29)Ag_(4)were obtained *** differential scanning calorimetry(DSC)measurement was used to obtain the characteristic temperature of Mg-Zn-Ag metallic glasses for the glass-forming ability *** maximum glass transition temperature(Trg)was found to be 0.525 with a composition close to Mg_(67)Zn_(29)Ag_(4),which results in the best glass-forming ***,the immersion test in simulated body fluid(SBF)demonstrate the relative homogeneous corrosion behavior of the Mg-Zn-Ag metallic *** corrosion rate of Mg-Zn-Ag metallic glasses in SBF solution decreases with the increase of Zn *** sample Mg_(67)Zn_(29)Ag_(4)has the lowest corrosion rate of 0.19mm/yr,which could meet the clinical application requirement *** in vitro cell experiments show that the Madin-Darby canine kidney(MDCK)cells cultured in sample Mg_(67)Zn_(29)Ag_(4)and its extraction medium have higher ***,the Mg-Zn-Ag metallic glasses exhibit obvious inhibitory effect on human rhabdomyosarcoma(RD)tumor *** present investigations on the glass-forming ability,corrosion behavior,cytocompatibility and tumor inhibition function of the Mg-Zn-Ag based metallic glass could reveal their biomedical application possibility.

关键词： Metallic glasses Mg-Zn-Ag Corrosion behavior In vitro cytocompatibility

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