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Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels

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Chinese Physics B 2021年第8期30卷 295-300页

作者： mi zhou Li-Yan Tang State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China

The pursuit of a systematic frequency uncertainty beyond 10^(-18) clock has triggered a multitude of investigations on the multipolar and higher-order lattice light *** Cd atom has been proposed as a new candidate for the development of a lattice clock because of its smaller blackbody radiation shift at room ***,we apply an improved combined method of the Dirac-Fock plus core polarization and relativistic configuration interaction methods to calculate the dynamic multipolar polarizabilities of the Cd clock *** effects of the high-order core-polarization potentials on the energies,reduced matrix elements,and multipolar polarizabilities have been evaluated *** detailed comparison with available literature demonstrates that taking into account of the high-order core-polarization potentials is a simple and effective approach to improve the results of atomic properties for heavy atoms.

关键词： Cd atomic clock multipolar polarizabilities high-order core-polarization potentials DFCP+RCI method

ER-Net:Efficient Recalibration Network for Multi-ViewMulti-Person 3D Pose Estimation

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Computer Modeling in Engineering & Sciences 2023年第8期136卷 2093-2109页

作者： mi zhou Rui Liu Pengfei Yi Dongsheng zhou National and Local Joint Engineering Laboratory of Computer Aided Design School of Software EngineeringDalian UniversityDalian116622China School of Computer Science and Technology Dalian University of TechnologyDalian116024China

Multi-view multi-person 3D human pose estimation is a hot topic in the field of human pose estimation due to its wide range of application *** the introduction of end-to-end direct regression methods,the field has entered a new stage of ***,the regression results of joints that are more heavily influenced by external factors are not accurate enough even for the optimal *** this paper,we propose an effective feature recalibration module based on the channel attention mechanism and a relative optimal calibration strategy,which is applied to themulti-viewmulti-person 3D human pose estimation task to achieve improved detection accuracy for joints that are more severely affected by external ***,it achieves relative optimal weight adjustment of joint feature information through the recalibration module and strategy,which enables the model to learn the dependencies between joints and the dependencies between people and their corresponding *** call this method as the Efficient Recalibration Network(ER-Net).Finally,experiments were conducted on two benchmark datasets for this task,Campus and Shelf,in which the PCP reached 97.3% and 98.3%,respectively.

关键词： Multi-view multi-person pose estimation attention mechanism computer vision

Drug discovery by targeting the protein–protein interactions involved in autophagy

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Acta Pharmaceutica Sinica B 2023年第11期13卷 4373-4390页

作者： Honggang Xiang mi zhou Yan Li Lu zhou Renxiao Wang Department of Medicinal Chemistry School of PharmacyFudan UniversityShanghai 201203China

Autophagy is a cellular process in which proteins and organelles are engulfed in autophagosomal vesicles and transported to the lysosome/vacuole for ***–protein interactions(PPIs)play a crucial role at many stages of autophagy,which present formidable but attainable targets for autophagy ***,selective regulation of PPIs tends to have a lower risk in causing undesired off-target effects in the context of a complicated biological ***,small-molecule regulators,including peptides and peptidomimetics,targeting the critical PPIs involved in autophagy provide a new opportunity for innovative drug *** article provides general background knowledge of the critical PPIs involved in autophagy and reviews a range of successful attempts on discovering regulators targeting those *** strategies and existing limitations in this field are also discussed.

关键词： Autophagy regulation Protein–protein interactions Small-molecule regulators Drug discovery

Enhanced catalytic degradation process of o-nitrochlorobenzene by palladium-catalyzed Fe^0 particles

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Journal of Environmental Sciences 2005年第5期17卷 849-852页

作者： XU Xin-hua zhou Hong-yi zhou mi WANG Da-hui Department of Environmental Engineering Zhejiang University Hangzhou 310027 China College of Biological and Environmental Engineering Zhejiang University of Technology Hangzhou 310032 China

Over Pd/Fe bimetallic catalyst, o-nitrochlorobenzene（o-NCB）, at a concentration of 20 mg/L in aqueous solutions, is rapidly converted to o-chloroaniline（o-CAN） first, and then quickly dechlorinated to aniline（AN） and Cl^- , without other intermediate reaction products. The aminated and dechlorinated reactions are believed to take place on the surface site of the Pd/Fe. The o-NCB removal efficiency and the next dechlorination rate increase with an increase of bulk loading of palladium and catalysts addition due to the increase of both the surface loading of palladium and the total surface area. These results indicate that reduction, amination and dechlorination of o- NCB by palladium-catalyzed Fe^0 particles, can be designed for remediation of contaminated groundwater.

关键词： palladium-catalyzed Fe^0 amination dechlornation o-NCB

Strict Feasibility of Variational Inequalities in Reflexive Banach Spaces

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Acta Mathematica Sinica,English Series 2007年第3期23卷 563-570页

作者： Yi Ran HE Xiu Zhen MAO mi zhou Department of Mathematics Sichuan Normal University Chengdu 610068 P. R. China

Strict feasibility is proved to be an equivalent characterization of （dual） variational inequalities having a nonempty bounded solution set, provided the mappings involved are stably properly quasimonotone. This generalizes an earlier result from finite-dimensional Euclidean spaces to infinitedimensional reflexive Banach spaces. Moreover, the monotonicity-type assumptions are also mildly relaxed.

关键词： variational inequalities well-positioned sets barrier cone strict feasibility stably properly quasimonotone

Numerical study on lateral wall displacement of deep excavation supported by IPS earth retention system

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Underground Space 2017年第4期2卷 259-271页

作者： Tugen Feng Long Liu Tao Tong mi zhou Key Laboratory of M inistry of Education for Geomechanics and Embankment Engineering Jiangsu Research Center for Geotechnical Engineering TechnologyHohai University1 Xikang RdNanjing 210098China Survey and Design Research Institute of Jiangxi Province 169 Zhiyang RdNanchang 330095China School of Civil and Transportation Engineering State Key labor atory of Subtropical Building ScienceSouth China University of Techmnology381 Wushan RoadGuangzhou 510640China

The objective of this study is to investigate the 3D behavior characteristics of an excavation supported by an innovative prestressed support(IPS)earth retention system.A numerical simulation was conducted in order to provide insight into the IPS system behavior by using the FLAC3D *** to the parametric study,validation work was conducted by means of a comparison of the deformation between theﬁeld test data and numerical analysis results,and strong agreement was *** reasonable excavation location,lay-ered excavation thickness,and blocked excavation sequence are presented according to variable parameter *** view of the pre-viousﬁndings,certain measurements are proposed in order to control the foundation pit *** results indicate that prestress compensation has a signiﬁcant effect on the IPS system behavior,while an optimized excavation sequence slightly improves its *** the conclusion proposed based on the numerical results,the aim is to provide reference data for optimization design and the construction sequence.

关键词： FLAC3D IPS system Prestress compensation Layered excavation Blocked excavation Deformation control

Numerical Investigation of the Superimposed Effects on Stator Wake Oscillation in an Axial-radial Combined Compressor

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Journal of Thermal Science 2014年第1期23卷 22-35页

作者： ZHAO Ben YANG Ce HU Liangjun zhou mi ZHANG Jizhong School of Mechanical Engineering Beijing Institute of Technology Basic Subject Department Bohai Shipbuilding Vocational College Science and Technology on Diesel Engine Turbocharging Laboratory China North Engine Research Institute

The superimposed influences of the blade rows in a multistage compressor are important because different matches of upstream and downstream blades can result in significant differences in the stator wake oscillation. Numerical investigation of the axial stator wake oscillation, which is affected upstream by the axial rotor and downstream by the radial rotor, was performed in an axial-radial combined compressor. Many configurations with different blade numbers and locations, which influence axial stator wake oscillation were investigated. When rotors have equal blade numbers, the axial stator wake oscillates periodically versus time within time T(moving blade passing 1/3 revolution). In contrast, stator wake oscillates irregularly within T when rotors have different blade numbers. A model-split subtraction method is presented in order to separate the influences of the individual blade rows on the wake oscillation of the axial stator. Analysis from the rotor-stator configuration showed that the unsteady flow angle fluctuation response is caused by the upstream rotor. For the rotor-stator-rotor configuration, the unsteady flow angle fluctuations are influenced by upand downstream blade rows. With the model-split subtraction method, the upand downstream influences on the flow angle fluctuation could be clearly separated and quantified. Low amplitudes could be observed when the influences from upand downstream moving rows were superimposed with the "positive peaknegative peak" type wave. Clocking investigations were carried out to change the relative superimposed phase of influences from the surrounding blade rows in order to modulate the amplitudes of the axial stator wake oscillation. However, the amplitudes did not reach the maximum when they were superimposed with "positive peak-positive peak" type wave due to the impact of the interaction between the two moving blade rows.

关键词： axial-radial combined compressor wake oscillation superimposed effect absolute flow angle clocking

Unsteady Flow Variability Driven by Rotor-stator Interaction at Rotor Exit

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Chinese Journal of Aeronautics 2012年第6期25卷 871-878页

作者： ZHAO Ben YANG Ce CHEN Shan QI mingxu zhou mi School of Mechanical and Vehicular Engineering Beijing Institute of Technology Beijing 100081 China Basic Subject Department Bohai Shipbuilding Vocational College Huludao 125000 China

Numerical investigation of the unsteady flow variability driven by rotorstator interaction in a transonic axial compressor is performed. Two models with close and far axial gap between rotor and stator rows are studied in the simulation. Particular attention is attached to the analysis of mechanisms involved in driving rotor wake oscillation, rotor wake skewing and flow angle fluctuation at rotor exit. The results show that smaller axial gap is favorable to enhance the interaction in the region between two adjacent rows, and the fluctuation of the static pressure difference between two sides of rotor wake is improved by potential field from down stator, which is the driving force for rotor wake oscillation. The interaction between rotor and stator is weakened by increasing axial distance, rotor wake shifts to suction side of rotor blade with 5%-10% of rotor pitch, the absolute value of flow angle at rotor exit is less than that in the case of close interspace for every time step, and the fluctuation amplitude is also decreased.

关键词： transonic compressor numerical simulation rotor-stator interaction unsteady flow wake oscillation

Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium–titanium sinter reduced with CO gas at 873–1273 K

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International Journal of minerals,Metallurgy and Materials 2018年第2期25卷 145-152页

作者： Song-tao Yang mi zhou Tao Jiang Xiang-xin Xue School of Metallurgy Northeastern UniversityShenyang 110819China School of Materials and Metallurgy University of Science and Technology LiaoningAnshan 114051China Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources Shenyang 110819China

Reduction of chromium-bearing vanadium–titanium sinter（CVTS） was studied under simulated conditions of a blast furnace, and thermodynamics and kinetics were theoretically analyzed. Reduction kinetics of CVTS at different temperatures was evaluated using a shrinking unreacted core model. The microstructure, mineral phase, and variation of the sinter during reduction were observed by X-ray diffraction, scanning electron microscopy, and metallographic microscopy. Results indicate that porosity of CVTS increased with temperature. Meanwhile, the reduction degree of the sinter improved with the reduction rate. Reduction of the sinter was controlled by a chemical reaction at the initial stage and inner diffusion at the final stage. Activation energies measured 29.22–99.69 k J/mol. Phase transformations in CVTS reduction are as follows： Fe_2O_3→Fe_3O_4→FeO→Fe; Fe_2TiO_5→Fe_2TiO_4→FeTiO_3; FeO·V_2O_3→V_2O_3; FeO·Cr_2O_3→Cr_2O_3.

关键词： sinter kinetics reduction mineral phase