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MAXIMAL ELEMENTS AND EQUILIBRIUM OF ABSTRACT ECONOMY

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Applied Mathematics and Mechanics(English Edition) 2001年第10期22卷 1225-1230页

作者： LIU Xin-ge(刘心歌) CAI hai-tao(蔡海涛) Science Research Institute Department of Applied Mathematics and Applied Software Central South University Changsha 410083 P R China Science Research Institute Department of Applied Mathematics and Applied Software Central South University Changsha 410083 P R China

An existence theorem of maximal elements for a new type of preference correspondences which are Q(0)-majorized is given. Then some existence theorems of equilibrium for abstract economy and qualitative game in which the constraint or preference correspondences are Q(0)-majorized are obtained in locally convex topological vector spaces.

关键词： Q(0)-class Q(0)-majorized maximal element equilibrium abstract economy

Superconductivity in nickel-based 112 systems

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The Innovation 2022年第1期3卷 108-121页

作者： Qiangqiang Gu hai-Hu wen National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China

Superconductivity has been discovered recently in infinite-layer nickel-based 112 thin films R_(1-x)A_(x)NiO_(2)(R=La,Nd,Pr and A=Sr,Ca).They are isostructural to the infinite-layer cuprate(Ca,Sr)CuO_(2)and are supposed to have a formal Ni 3d9 valence,thus providing a new platform to study the unconventional pairing mechanismof high-temperature *** important discovery immediately triggers a huge amount of innovative scientific curiosity in the *** this paper,we try to give an overview of the recent research progress on the newly found superconducting nickelate systems,both from experimental and theoretical *** mainly focus on the electronic structures,magnetic excitations,phase diagrams and superconducting gaps,and finally make some open discussions for possible pairing symmetries in Ni-based 112 systems.

关键词： field nickel infinite

Steady-state relation of a two-level system strongly coupled to a many-body quantum chaotic environment

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Communications in Theoretical Physics 2023年第2期75卷 56-59页

作者： Hua Yan Jiaozi Wang wen-ge Wang Department of Modern Physics University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Microscale Magnetic Resonance University of Science and Technology of ChinaHefei 230026China Department of Physics University of OsnabrückD-49076 OsnabrückGermany

We study the long-time average of the reduced density matrix(RDM)of a two-level system as the central system,which is locally coupled to a many-body quantum chaotic system as the environment,under an overall Schr?dinger evolution.A phenomenological relation among elements of the RDM is proposed for a dissipative interaction in the strong coupling regime and is tested numerically with the environment as a defect Ising chain,as well as a mixed-field Ising chain.

关键词： steady-state relations eigenstate thermalization hypothesis quantum chaos two-level system

Characterization of W80Cu20 alloy sheet prepared by hot-rolling

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Rare Metals 2013年第6期32卷 569-573页

作者： Hu-Ping Guo wen-ge Chen Hui Zhang School of Materials Science and Engineering Xi'an University of Technology

Multi-pass hot-rolling technique was used to fabricate W80Cu20 alloy,and its properties were characterized in this *** show that the W-Cu alloy sheets with a thickness of 0.5 mm and a relative density of99.87%can be successfully made using this new technique at 800℃.In hot-rolling process,Cu phases are closely surrounded by W particles under the rolling stress to form a network microstructure,thus making significant increase in electrical and thermal conductivity up to53.00%and 24.44%,*** and longitudinal hardness of the W–Cu sheets significantly increase due to the enhanced densification and deformation *** to that of the raw materials,three fracture types were observed in the hot-rolled materials,i.e.,ductile fracture of Cu binding phases,trans-granular fracture of W phases,and W–W interfacial fracture.

关键词： Hot-rolling W-Cu alloy Properties Fracture morphology Sheet

Effect of BaO and MgO on structure and properties of aluminate slag with various CaO/Al_(2)0_(3)ratios

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Journal of Iron and Steel Research International 2024年第1期31卷 204-214页

作者： Yu-qi Kong Ting Wu wen-zhi Xia wen Yang hai-chuan Wang School of Metallurgical Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina Key Laboratory of Metallurgical Emission Reduction and Resource Recycling(Ministry of Education) Anhui University of TechnologyMa’anshan243002AnhuiChina

To provide theoretical guidance for performance stability control of low-reactive mold fluxes,the effects of BaO and MgO on the structure and properties of aluminate slag with various CaO/Al_(2)0_(3)(C/A)ratios were investigated using the Fourier transform infrared spectrometer,Raman spectroscope,hemispherical melting point instrument,rotational viscometer and X-ray *** results indicated that with BaO and MgO addition,the structure polymerization was first weakened and then enhanced at C/A of 1.1,and the transition contents corresponded to 8 wt.%BaO and 2 wt.%MgO,respectively,while the structure polymerization decreased continuously at C/A of *** the viscosity change was well consistent with the structure evolution,the polymerization degree played a more prominent role in the slag viscosity than superheat degree when the melting temperature difference was within 40℃.The break temperature decreased initially and then increased with augment of BaO and MgO at C/A of 1.1,while it manifested a decrease trend with BaO addition,and it decreased obviously but then turned to increase with MgO increment at C/A of *** crystallization phase and crystallization ratio kept stable with BaO increment,while the crystallization ratio rose greatly with MgO promoting LiAlO_(2)precipitation at C/A of *** crystal types of all experimental slags were mainly Ca_(12)Al_(14)O_(33)and CaF_(2)at C/A of 1.3,and the precipitation of crystalline phase BaAl2O4 demonstrated a rising trend,while that of Ca_(12)Al_(14)O_(33)gradually declined with BaO augment.

关键词： Aluminate slag Structure MgO BaO Viscosity Property

Cerebral fat embolism following autologous fat injection in facial reconstruction:A case report

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World Journal of Clinical Cases 2025年第2期13卷 50-58页

作者： Xiu-Ying Chen Fa Shen Chang Cheng Yu-Han Wang wen-Chao Cheng De-Zhi Yuan wen Huang Department of Neurology Chongqing Emergency Medical CenterChongqing University Central HospitalChongqing 400000China Department of Neurology Xinqiao HospitalThe Army Medical University(Third Military Medical University)Chongqing 400000China

BACKGROUND Autologous fat injection in facial reconstruction is a common cosmetic *** cerebral fat embolism(CFE)as a complication is rare,it carries serious health *** SUMMARY We present a case of a 29-year-old female patient who developed acute CFE following facial fat filling *** the surgery,the patient experienced symptoms including headache,nausea,vomiting,and difficulty breathing,which was followed by neurological symptoms such as slurred speech and left-sided *** physical examination and auxiliary investigations,including blood tests,head and neck computed tomography angiography,and cranial magnetic resonance diffusion-weighted imaging,were performed upon *** clinical diagnosis was acute cerebral embolism following facial fat filling *** included measures to improve cerebral circulation,dehydration for intracranial pressure reduction,nutritional support,and rehabilitation therapy for left limb *** patient showed a significant improvement in symptoms after 2 weeks of *** recovered left limb muscle strength to grade 5,had clear speech,and experienced complete relief of *** Our case highlights the potential occurrence of severe complications in patients undergoing fat injection in facial *** prevent these complications,plastic surgeons should enhance their professional knowledge and skills.

关键词： Cerebral fat embolism Mechanical thrombectomy Thrombolysis Steroid therapy Symptomatic treatment Case report

Superconductivity in Li OHFe S single crystals with a shrunk c-axis lattice constant

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Science China(Physics,Mechanics & Astronomy) 2017年第2期Mechanics & Astronomy) .卷 50-54页

作者： hai Lin Rui Zhe Kang Lu Kong XiYu Zhu hai-Hu wen Center for Superconducting Physics and Materials National Laboratory of Solid State Microstructures and Department of PhysicsNational Collaborative Innovation Center of Advanced Microstructures Nanjing University

By using a hydrothermal ion-exchange method, we have successfully grown superconducting crystals of Li OHFe S with Tcof about 2.8 K. Being different from the sister sample(Li1-xFex)OHFe Se, the energy dispersion spectrum analysis on Li OHFe S shows that the Fe/S ratio is very close to 1:1, suggesting an almost charge neutrality and less electron doping in the Fe S planes of the system. Comparing with the non superconducting Li OHFe S crystal, each peak of the X-ray diffraction pattern of the superconducting crystal splits into two, and the diffraction peaks locating at lower reflection angles are consistent with that of non-superconducting ones. The rest set of diffraction peaks with higher reflection angles is corresponding to the superconducting phase, suggesting that the superconducting phase may has a shrunk c-axis lattice constant. Magnetization measurements indicate that the magnetic shielding due to superconductivity can be quite high under a weak magnetic field. The resistivity measurements under various magnetic fields show that the upper critical field is quite low, which is similar to the tetragonal Fe S superconductor.

关键词： iron chalcogenides magnetic properties transport properties

Robust superconductivity and transport properties in (Li_(1-x)Fe_x)OHFeSe single crystals

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Science China(Physics,Mechanics & Astronomy) 2016年第5期59卷 11-15页

作者： hai Lin Jie Xing Xi Yu Zhu Huan Yang hai-Hu wen Center for Superconducting Physics and Materials National Laboratory of Solid State Microstructures and Department of PhysicsNational Collaborative Innovation Center of Advanced Microstructures Nanjing University

The recently discovered(Li_(1-x) Fe_x)OHFe Se superconductor with T c about 40 K provides a good platform for investigating the magnetization and electrical transport properties of Fe Se-based superconductors. By using a hydrothermal ion-exchange method,we have successfully grown crystals of(Li_(1-x) Fe_x)OHFe Se. X-ray diffraction on the sample shows the single crystalline Pb O-type structure with the c-axis preferential orientation. Magnetic susceptibility and resistive measurements show an onset superconducting transition at around T c=38.3 K. Using the magnetization hysteresis loops and Bean critical state model, a large critical current J s is observed in low temperature region. The critical current density is suppressed exponentially with increasing magnetic *** dependencies of resistivity under various currents and fields are measured, revealing a robust superconducting current density and bulk superconductivity.

关键词： iron chalcogenides critical currents magnetic properties transport properties

Uncertainty aversion and farmers' innovative seed adoption:Evidence from a field experiment in rural China

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Journal of Integrative Agriculture 2023年第6期22卷 1928-1944页

作者： WU hai-xia SONG Yan YU Le-shan ge Yan Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081P.R.China Sino-Danish College University of Chinese Academy of SciencesBeijing 101408P.R.China School of Public Policy and Management University of Chinese Academy of SciencesBeijing 100040P.R.China International Business School Shaanxi Normal UniversityXi’an 710100P.R.China School of Public Finance and Taxation Central University of Finance and EconomicsBeijing 100081P.R.China

Based on the microdata of 705 wheat farmers in the Loess Plateau, this study empirically analyzes the impact of uncertainty on farmers' adoption of innovative seeds using a field experiment. The results indicate that farmers are generally ambiguity-averse and risk-averse. In addition, farmers with higher ambiguity aversion and risk aversion are less likely to adopt innovative wheat seeds, where their risk aversion plays a dominant role. Enhancing information access will alleviate the negative influence of ambiguity aversion on farmers' adoption of innovative seeds, and interlinked insurance and credit contracts will be beneficial to ease the adverse effect of risk aversion on the adoption of innovative wheat seeds. Meanwhile, heterogeneity analysis reveals that the inhibitory effects of ambiguity aversion and risk aversion on innovative seed adoption are more significant among farmers with lower education and household *** government can establish both ex-ante and ex-post relevant guarantee mechanisms to help farmers preferably cope with various uncertainties in the production process, remitting farmers' ambiguity aversion and risk aversion to enhance new agricultural technology adoption rates.

关键词： ambiguity aversion risk aversion technology adoption field experiment