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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

Jump Detector: An automated monitoring equipment for the locomotion of jumping insects

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Insect Science 2020年第3期27卷 613-624页

作者： Feng Zhou Le Kang xian-hui Wang Department of Entomology College of Plant ProtectionChina Agricultural UniversityBeijingChina State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina

Continuous jumping behavior,a kind of endurance locomotion,plays important roles in insect ecological adaption and ***,the methods used for the efficient evaluation of insect jumping behavior remain largely ***,we developed a locomotion detection system named JumpDetector with automatic trajectory tracking and data analysis to evaluate the jumping of *** automated system exhibits more accurate,efficient,and adjustable performance than manual *** using this automatic system,we characterized a gradually declining pattern of continuous jumping behavior in 4th‐instar nymphs of the migratory *** found that locusts in their gregarious phase outperformed locusts in their solitary phase in the endurance jumping ***,the JumpDetector could be widely used in jumping behavior and endurance locomotion measurement.

关键词： bio-artificial interaction endurance locomotion EthoVision jumping behavior Locusta migratoria

Control synthesis for polynomial nonlinear systems and application in attitude control

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第6期9卷 833-839页

作者： Chang-fei TONG hui ZHANG You-xian SUN Institute of Industrial Process Control Zhejiang University Hangzhou 310027 China

A method for positive polynomial validation based on polynomial decomposition is proposed to deal with control synthesis problems. Detailed algorithms for decomposition are given which mainly consider how to convert coefficients of a polynomial to a matrix with free variables. Then, the positivity of a polynomial is checked by the decomposed matrix with semidefinite programming solvers. A nonlinear control law is presented for single input polynomial systems based on the Lyapunov stability theorem. The control synthesis method is advanced to multi-input systems further. An application in attitude control is finally presented. The proposed control law achieves effective performance as illustrated by the numerical example.

关键词： Nonlinear control Attitude control Polynomial systems

MgN_(4)掺杂石墨烯CO氧化催化活性的密度泛函研究

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原子与分子物理学报 2025年第2期42卷 57-62页

作者：袁利郑灵丹周慧颖徐先燕广州医科大学公共卫生学院广州511436 韶关学院化学与土木工程学院韶关512005

鉴于镁卟啉所呈现的催化活性,采用密度泛函理论考察了MgN_(4)结构掺杂石墨烯的CO氧化催化活性.研究发现MgN_(4)掺杂石墨烯具有良好的结构稳定性,O_(2)优先吸附在金属活性位点且不易解离.其CO氧化以Eley-Rideal(ER)机理实现,决速步能垒仅... 详细信息

鉴于镁卟啉所呈现的催化活性,采用密度泛函理论考察了MgN_(4)结构掺杂石墨烯的CO氧化催化活性.研究发现MgN_(4)掺杂石墨烯具有良好的结构稳定性,O_(2)优先吸附在金属活性位点且不易解离.其CO氧化以Eley-Rideal(ER)机理实现,决速步能垒仅为0.67 eV,与FeC_(3)、AlN_(4)掺杂石墨烯具有相当的催化活性.MgN_(4)掺杂石墨烯有望是一种具有潜在CO氧化催化活性的催化剂.

关键词： MgN_(4)掺杂石墨烯 CO氧化密度泛函理论

Analysis of prognostic factors in patients with emergency sepsis

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World Journal of Clinical Cases 2023年第25期11卷 5903-5909页

作者： xian-Li ning Min Shao Department of Emergency Anqing Municipal HospitalAnqing 246000Anhui ProvinceChina Department of Critical Care Medicine The First Affiliated Hospital of Anhui Medical UniversityHefei 230031Anhui ProvinceChina

BACKGROUND Emergency sepsis is a common and serious infectious disease,and its prognosis is influenced by a number of *** To analyse the factors influencing the prognosis of patients with emergency sepsis in order to provide a basis for individualised patient treatment and *** retrospectively analysing the clinical data collected,we conducted a comprehensive analysis of factors such as age,gender,underlying disease,etiology and site of infection,inflammatory indicators,multi-organ failure,cardiovascular function,therapeutic measures,immune status and severity of *** Data collection:Clinical data were collected from patients diagnosed with acute sepsis,including basic information,laboratory findings,medical history and treatment *** selection:Variables associated with prognosis were selected,including age,gender,underlying disease,etiology and site of infection,inflammatory indicators,multi-organ failure,cardiovascular function,treatment measures,immune status and severity of *** analysis:The data collected are analysed using appropriate statistical methods such as multiple regression analysis and survival *** impact of each factor on prognosis was assessed according to prognostic indicators,such as survival,length of stay and complication *** Descriptive statistics:Descriptive statistics were performed on the data collected from the patients,including their basic characteristics and clinical *** Type 2 diabetes mellitus were independent factors affecting the prognosis of patients with sepsis.

关键词： Platelet count Length of ICU stay Mechanical ventilation Abdominal infection Combined coronary artery disease

Lie Symmetry and Conserved Quantities for Nonholonomic Vacco Dynamical Systems

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Communications in Theoretical Physics 2006年第2X期46卷 265-268页

作者： DING ning FANG Jian-hui College of Physics and Technology China University of Petroleum Dongying 257061 China

In this paper the Lie symmetry and conserved quantities for nonholonomic Vacco dynamical systems are studied. The determining equation of the Lie symmetry for the system is given. The general Hojman conserved quantity... 详细信息

关键词： Vacco dynamical system Lie symmetry general Hojman conserved quantity Lutzky conserved quantity

Perturbation to Mei Symmetry and Noether Adiabatic Invariants for Birkhoffian Systems

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Communications in Theoretical Physics 2008年第6期49卷 1410-1412页

作者： DING ning FANG Jian-hui Department of Physics and Electronics Science Binzhou University Binzhou 256600 China College of Physics Science and Technology China University of Petroleum Dongying 257061 China

Based on the concept of adiabatic invariant, the perturbation to Mei symmetry and Noether adiabatic invariants for Birkhoffian systems are studied. The exact invariants of Mei symmetry for the system without perturbation are given. The perturbation to Mei symmetry is discussed and the Noether adiabatic invariants induced from the perturbation to Mei symmetry of the system are obtained.

关键词： Mei symmetry perturbation Noether adiabatic invariant Birkhoffian system

A New Type of Mei Adiabatic Invariant Induced by Perturbation to Mei Symmetry of Hamiltonian Systems

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Communications in Theoretical Physics 2009年第7期52卷 12-16页

Considering full perturbation to infinitesimal generators in the Mei structure equation,a new type of Meiadiabatic invariant induced by perturbation to Mei symmetry for Hamiltonian system was reported.

关键词： Mei symmetry perturbation Mei adiabatic invariant Hamiltonian system

Recovery rates of iron, nickel, and chromium via iron-bath reduction of stainless steel dust briquettes based on corundum crucible erosion balance analysis

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Journal of Iron and Steel Research International 2018年第3期25卷 320-329页

作者： Fei Yuan hui-ning Zhang hui Li Jian-hong Dong hui-hui Xiong An-jun Xu School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083 China School of Metallurgy and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000 Jiangxi China China Metallurgical Industry Planning and Research Institute Beijing 100083 China

The leaching of chromium from stainless steel dust （SSD） is deleterious to the environment. To address this issue, the reduction of SSD briquettes can be employed to effectively extract chromium. The recovery rates of iron, chromium, and nickel via ironbath reduction of SSD briquettes were determined using X-ray fluorescence spectroscopy, X-ray diffraction, and scanning electron microscopy measurements. First, the effects of basicity and contents of silicon, iron, CaF2, and carbon on the recovery rates of the three metals were analyzed using the slag amount prediction model, which was originally established from the A1203 balance of corundum crucible erosion behavior. Second, the effect of feeding mode, i.e., whether steel scrap and SSD briquettes were simultaneously added, on the recovery rates was discussed in detail. Third, the iron-bath reduction of SSD briquettes was thermodynamically analyzed. The results indicated that the recovery rates of the three metals are greater than 95% those of using a basicity of 1.5 and 6.0% CaF2, 15% carbon, and 7% ferrosilicon. The recovery rate of chromium increases twofold with the addition of ferrosilicon. The feeding mode of adding briquettes and steel scrap simultaneously is better for recovery of metals and separation of the metal and slag than the feeding mode of adding steel scrap firstly and then briquettes.

关键词： Stainless steel dust Erosion model Ferrosilicon Iron Nickel-Chromium Recovery Iron-bath reduction