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Lower bound of local quantum uncertainty for high-dimensional bipartite quantum systems

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Science China(Physics,Mechanics & Astronomy) 2019年第9期62卷 34-40页

作者： shuhao wang Hui Li Xian Lu Bin Chen State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China School of Science Tianjin University of TechnologyTianjin 300191China Institute of Software Chinese Academy of SciencesBeijing 100080China

Quantum correlations are of fundamental importance in quantum phenomena and studies related to quantum information processing. The measurement of quantum correlations is a central challenge. A recently proposed measure of quantum correlations,local quantum uncertainty(LQU), satisfies all the physical requirements as a measure of quantum correlations. This study derives a closed-form lower bound of the LQU for arbitrary-dimensional bipartite quantum states using operator relaxation. We also compared the lower bound with the optimized LQU for several typical sets of quantum states. The results show that the lower bound is near to the optimized LQU for three-dimensional bipartite quantum systems.

关键词： quantum correlations local quantum uncertainty bipartite quantum systems

High piezoelectricity and low strain hysteresis in PMN-PT-based piezoelectric ceramics

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Journal of Advanced Ceramics 2023年第4期12卷 792-802页

作者： Jiajia wang shuhao wang Xiang Li Ling Li Zhen Liu Ji Zhang Yaojin wang School of Materials Science and Engineering Nanjing University of Science&TechnologyNanjing 210094China

High piezoelectric properties and low strain hysteresis(H)are both equally necessary for practical applications in precisely controlled piezoelectric devices and *** most of previous reports,where enhanced piezoelectric performance is typically accompanied by large hysteresis in lead-/lead-free-based ceramics,in this work,we report a reconstructed relaxor ferroelectric composition in 0.68Pb(Mg_(1/3)Nb_(2/3))O3-0.32PbTiO_(3)(0.68PMN-0.32PT)ceramics through the introduction of(Bi_(0.5)Na_(0.5))ZrO(BNZ)to simultaneously achieve low strain hysteresis(~7.68%),superior piezoelectricity(~1040 pC·N^(-l)),and an electric field induced strain of 0.175%.Our work not only paves the way to simultaneously large piezoelectricity and negligible strain hysteresis in ceramic systems,but also lays the foundation for the further development of novel functional materials.

关键词： piezoelectric ceramics dielectric relaxor ferroelectric strain hysteresis(H)

Fabricating a PVDF skin for PEO-based SPE to stabilize the interface both at cathode and anode for Li-ion batteries

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Journal of Energy Chemistry 2022年第7期31卷 356-362,I0010页

作者： Qi Ye Haoyue Liang shuhao wang Can Cui Cheng Zeng Tianyou Zhai Huiqiao Li State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

Poly(ethylene oxide)(PEO)-based solid polymer electrolyte is always the most promising candidate for preparing thinner, lighter and safer lithium-ion batteries. However, the lithium dendrites growth of lithium anode and the high-voltage oxidation of cathode are easy to cause the PEO-based battery *** way to deal with the different challenges on both sides of the anode and cathode is pursued all the time. In this study, we reported a new strategy to construct the PVDF/PEO/PVDF three-layer structure for solid polymer electrolyte(marked as PVDF@PEO) using PVDF as the functional “skin”. The PVDF@PEO electrolyte can effectively prevent from the lithium dendrites, and shows a stable cycling life over1000 h in the Li/PVDF@PEO/Li cell. In addition, the PVDF@PEO electrolyte exhibits higher oxidation resistance and can be matched with high-voltage LiCoO_(2) cathode. The Li/PVDF@PEO/LiCoO_(2) cell delivered a specific capacity of about 150 m Ah g^(-1) over 150 cycles and maintained good cycling stability. Our research provides insights that the polymer electrolytes constructed with PVDF functional “skin” can simultaneously meet the challenges of both anode and cathode in solid-state lithium-ion batteries(SSLIBs).

关键词： PVDF PEO Solid-state lithium-ion batteries Cathode Anode

Geochemistry of Pyrite from the Gangcha Gold Deposit, West Qinling Orogen, China: Implications for Ore Genesis

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Acta Geologica Sinica(English Edition) 2017年第6期91卷 2164-2179页

作者： NIE Xiao SHEN Junfeng LIU Haiming DU Baisong wang shuhao LI Jie XU Liwei wang Ran School of Earth Sciences and Resources China University of Geosciences Département de géologie et de génie géologique Université Laval Inner Mongolia Ninth Geology Mineral Exploration and Development Co. Ltd Jinyou Geological Exploring Co. Ltd The Gold of CAPF

The Gangcha gold deposit was discovered in 2011 in the Xiahe-Hezuo region, West Qinling Orogen, China. Five types of pyrite have been identified in the ore according to the detailed mineral paragenetic studies. Geochemical data are presented for type I pyrite （pyl） rim-core zonation and for the different types of pyrite based on in-situ laser ablation inductively coupled plasma mass spectrometry （LA-ICP-MS） and electron probe microanalysis （EPMA）. The results show that pyrites are characterized with heterogeneous Au concentrations, which indicate that Au occurs mainly as micro- or nano-particle native inclusions. Time-resolved depth profiles demonstrate that As, Co and Ni occur as solid solutions in pyrite, whereas Cu, Pb, Zn and Ag occur mainly as inclusions. Trace element concentrations differ between rims and cores in pyl, and the differences also exist within different pyrite types. These differences indicate complex chemical evolution of the ore-forming fluids, and the overall geology, geochronology, and stable isotope and pyrite data suggest that the ore-forming fluids were closely linked to magmatic activity during the Triassic Period in West Qinling orogenic belt.

关键词： pyrite geochemistry Gangcha gold deposit West Qinling Qrogen

Emerging role of deep learning-based artificial intelligence in tumor pathology

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Cancer Communications 2020年第4期40卷 154-166页

作者： Yahui Jiang Meng Yang shuhao wang Xiangchun Li Yan Sun Department of Pathology Key Laboratory of Cancer Prevention and TherapyTianjin’s Clinical Research Center for CancerNational Clinical Research Center for CancerTianjin Cancer Institute and HospitalTianjin Medical UniversityTianjin 300060P.R.China Department Epidemiology and Biostatistics Key Laboratory of Cancer Prevention and TherapyTianjin’s Clinical Research Center for CancerNational Clinical Research Center for CancerTianjin Cancer Institute and HospitalTianjin Medical UniversityTianjin 300060P.R.China Institute for Interdisciplinary Information Sciences Tsinghua UniversityBeijing 100084P.R.China

The development of digital pathology and progression of state-of-the-art algorithms for computer vision have led to increasing interest in the use of artificial intelligence(AI),especially deep learning(DL)-based AI,in tumor *** DL-based algorithms have been developed to conduct all kinds of work involved in tumor pathology,including tumor diagnosis,subtyping,grading,staging,and prognostic prediction,as well as the identification of pathological features,biomarkers and genetic *** applications of AI in pathology not only contribute to improve diagnostic accuracy and objectivity but also reduce the workload of pathologists and subsequently enable them to spend additional time on high-level decision-making *** addition,AI is useful for pathologists to meet the requirements of precision ***,there are still some challenges relating to the implementation of AI,including the issues of algorithm validation and interpretability,computing systems,the unbelieving attitude of pathologists,clinicians and patients,as well as regulators and ***,we present an overview on how AI-based approaches could be integrated into the workflow of pathologists and discuss the challenges and perspectives of the implementation of AI in tumor pathology.

关键词： artificial intelligence-assisted bioinformatic analysis artificial intelligence deep learning pathology tumor

The crystallographic texture and dependent mechanical properties of the CrCoNi medium-entropy alloy by laser remelting strategy

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Journal of Materials Science & Technology 2022年第16期111卷 245-255页

作者： Pengsheng Xue Lida Zhu Jinsheng Ning Peihua Xu shuhao wang Zhichao Yang Yuan Ren Guiru Meng School of Mechanical Engineering and Automation Northeastern UniversityShenyang 110819China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China

Laser remelting(LR)has attracted widespread attention in recent years as an effective method to reduce internal defects and improve the surface quality of additively manufactured(AM)*** the present study,three different LR inter-layer scanning strategies(LR0,LR90 and LR45)and their effects on the porosity,microstructure,crystallographic texture and related mechanical properties of parts have been *** microscope,X-ray diffraction,and scanning electron microscope were used as characterization *** the LR90 sample,it shows obvious{111}texture and strongpreferred orientation along the scanning direction(SD),while the 0°offset and the 45°rotation of LR scanning strategy form a finer microstructure and weak crystallographic ***,the mechanical properties of the LR sample are improved compared with the sample only by laser metal deposition(LMD),and a combination of higher strength and optimal uniform elongation is obtained in the LR45 *** overall results show that a reasonable LR scanning strategy can reduce the anisotropy of AM parts and improve their mechanical properties.

关键词： CrCoNi Laser remelting Porosity Crystallographic orientation Mechanical properties

Thermoelectric characteristics of semiconductor minerals in earth's deep crust and their seismogenic significance

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Geoscience Frontiers 2022年第2期13卷 159-164页

作者： shuhao wang Junfeng Shen M.Santosh Yuanyuan Li Cheng-Xue Yang Liangkun Ma School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Department of Earth Science University of AdelaideAdelaideSA 5005Australia

Geo-electric anomalies are generated during the process of stress accumulation and release associated with ***,the mechanism of these anomalies remains *** on the analysis of thermoelectric characteristics of semiconductor minerals of the earth’s deep crust such as graphite,ferrosilicon alloy,magnetite etc.,we perform finite element analysis to evaluate the principles governing the thermoelectric power generated by minerals and *** results show that graphite,ferrosilicon alloy and magnetite all exhibit Seebeck effect and can be *** the thermo-electric field can be enhanced with the activation temperature increases,the content of thermoelectric minerals increases,the size of aggregates increases,and the spacing of thermoelectric minerals grains *** processes would generate a similar thermal *** natural semiconductor minerals in this thermal field show a thermoelectric effect,forming a thermoelectric field that interferes with the background electric *** study indicates that thermoelectric effect may have an important influence on the formation of geoelectric field.

关键词： Natural semiconductor minerals Seebeck effects Geoelectric anomalies Earthquakes Deep crust

Super-exchange effect induced by early 3d metal doping on NiFe_(2)O_(4)(001)surface for oxygen evolution reaction

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Journal of Energy Chemistry 2023年第3期78卷 21-29,I0002页

作者： shuhao wang Xinyan Liu Xiang Chen Kamran Dastafkan Zhong-Heng Fu Xin Tan Qiang Zhang Chuan Zhao School of Chemistry The University of New South WalesSydneyNSW 2052Australia Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina Integrated Materials Design Laboratory Department of Applied MathematicsResearch School of PhysicsThe Australian National UniversityCanberraACT 2601Australia

Understanding the intrinsic activity of oxygen evolution reaction(OER) is crucial for catalyst *** date,different metal-doping strategies have been developed to achieve this,but the involving mechanisms remain ***,the electronic structure of the transition metal-doped NiFe_(2)O_(4)(001) surface is scrutinized for OER intrinsic activity using density functional theory *** 3d-orbital filling metals(Ti,V,Cr,Mn,and Co) are introduced as dopants onto A-and B-layers of the NiFe_(2)O_(4)(001) surface,and variation of oxidation states over Fe sites is observed on *** the magnetic moment and charge transfer of surface cation sites reveals that the variation of Fe oxidation states originates from the super-exchange effect and is influenced by the t2g-electron configuration of 3d metal *** trend governs the generation of highly-active Fe3+sites on the B-layer,the adsorption strength of OER intermediates,i.e.,*O and*OH,and therefore the intrinsic *** finding of super-exchange mechanism induced by 3d early metal doping offers insights into electronic structure tailoring strategies for improving the intrinsic activity of OER electrocatalysts.

关键词： Oxygen evolution reaction NiFe spinel Oxidation states Super-exchange mechanism Density functional theory

The dynamic evolution of aggregated lithium dendrites in lithium metal batteries

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Chinese Journal of Chemical Engineering 2021年第9期34卷 137-143页

作者： Xin Shen Rui Zhang shuhao wang Xiang Chen Chuan Zhao Elena Kuzmina Elena Karaseva Vladimir Kolosnitsyn Qiang Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China School of Chemistry The University of New South WalesSydneyNSW 2052Australia Ufa Institute of Chemistry UFRC RAS Ufa450054Russia

Lithium(Li)metal anodes promise an ultrahigh theoretical energy density and low redox potential,thus being the critical energy material for next-generation ***,the formation of Li dendrites in Li metal anodes remarkably hinders the practical applications of Li metal ***,the dynamic evolution of discrete Li dendrites and aggregated Li dendrites with increasing current densities is visualized by in-situ optical microscopy in conjunction with ex-situ scanning electron *** revealed by the phase field simulations,the formation of aggregated Li dendrites under high current density is attributed to the locally concentrated electric field rather than the depletion of Li *** specifically,the locally concentrated electric field stems from the spatial inhomogeneity on the Li metal surface and will be further enhanced with increasing current *** the above two factors with the help of the constructed phase field model is able to regulate the electrodeposited morphology from aggregated Li dendrites to discrete Li dendrites,and ultimately columnar Li *** methodology and mechanistic understanding established herein give a significant step toward the practical applications of Li metal anodes.

关键词： Electrochemistry Li dendrites Rechargeable Li batteries In-situ optical microscopy Phase field model Electrochemical engineering