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Conversion-type cathode materials for high energy density solid-state lithium batteries

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Journal of Energy Chemistry 2025年第1期 409-425页

作者： Yuhao Ma Shihong qing Hongyu Liu Chuntao Ma Yuan Yu Chuang Yu Liping wang School of Materials and Energy University of Electronic Science and Technology of China Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology Zhejiang Sci-Tech University State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology

Solid-state lithium batteries （SSLBs） are regarded as an essential growth path in energy storage systems due to their excellent safety and high energy *** particular,SSLBs using conversion-type cathode materials have received widespread attention because of their high theoretical energy densities,low cost,and *** the great progress in research and development of SSLBs based on conversiontype cathodes,their practical applications still face challenges such as blocked ionic-electronic migration pathways,huge volume change,interfacial incompatibility,and expensive processing *** review focuses on the advantages and critical issues of coupling conversion-type cathodes with solid-state electrolytes （SSEs）,as well as state-of-the-art progress in various promising cathodes （e.g.,FeS2,CuS,FeF3,FeF2,and S） in ***,representative research on conversion-type solid-state full cells is discussed to offer enlightenment for their practical ***,the energy density exhibited by the S cathode stands out impressively,while sulfide SSEs and halide SSEs have demonstrated immense potential for coupling with conversion-type ***,perspectives on conversion-type cathodes are provided at the material,interface,composite electrode,and battery levels,with a view to accelerating the development of conversion-type cathodes for high-energy–density SSLBs.

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Characteristics of root-permeated soil under simple-shear and direct-shear conditions

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Journal of Mountain Science 2023年第8期20卷 2422-2435页

作者： CHEN Jing-yi CHEN Xiao-qing SONG Dong-ri LV Ming GUO Han-qing SADEGHI Hamed Laboratory of Mountain Hazards and Earth Surface Process/Institute of Mountain Hazards and Environment Chinese Academy of SciencesChengdu 610299China University of Chinese Academy of Sciences Beijing 100049China Department of Civil Engineering Sharif University of TechnologyTehran ***Iran

The simple-shear condition is closer to reality than the direct-shear condition for simulating the mechanical behavior of vegetated soil slope under shallow ***,study on simple-shear characteristics for vegetated slope is still insufficient,and there lacks intuitive comparison of characteristics between these two shear *** this study,large-scale simple-shear and direct-shear experiments were conducted on soil permeated by roots of Amorpha fruticosa to investigate the shear strength and *** stress-displacement relationship of each sample was obtained and further normalized to unify the influence of root *** results reveal that the direct-shear condition overestimates the shear strength of root-permeated soils(by 41%)and thus the estimation of slope stability based on the parameters of direct-shear condition is not ***,the initial stiffness of root-permeated soil under simple-shear condition is 34%lower than that under direct-shear *** higher strength and stiffness under direct-shear condition are caused by the following reasons:the shear plane does not have the lowest strength,the shear area is decreasing,and the shear zone is *** significant deformation(lower stiffness)revealed by the simple-shear condition facilitates the application of early warning for vegetated shallow landslides.

关键词： Simple-shear condition Direct-shear condition Root-permeated soil Shear strength Shear stiffness Shallow landslide

Spatial channel pairing based coherent combining for relay networks

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Frontiers of Information Technology & Electronic Engineering 2016年第9期17卷 938-945页

作者： Feng SHU Xiao-hui HUANG Jin-song HU Ting-ting LIU ri-qing CHEN Xiao-hu YOU Jun LI Jin wang College of Computer and Information Sciences Fujian Agriculture and Forestry University School of Electronic and Optical Engineering Nanjing University of Science and Technology National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave Propagation National Mobile Communications Research Laboratory Southeast University

In this paper, spatial channel pairing(SCP) is introduced to coherent combining at the relay in relay networks. Closed-form solution to optimal coherent combining is derived. Given coherent combining, the approximate SCP solution is presented. Finally, an alternating iterative structure is developed. Simulation results and analysis show that, given the symbol error rate and data rate, the proposed alternating iterative structure achieves signal-to-noise ratio gains over existing schemes in maximum ratio combining(MRC) plus matched filter,MRC plus antenna selection, and distributed space-time block coding due to the use of SCP and iterative structure.

关键词： Spatial channel pairing Coherent combining Alternating iterative structure Symbol error rate Distributed space-time block coding

Methods for determining unimpeded aircraft taxiing time and evaluating airport taxiing performance

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Chinese Journal of Aeronautics 2017年第2期30卷 523-537页

作者： Yu Zhang qing wang Civil and Environmental Engineering University of South Florida College of Air Traffic Management Civil Aviation University of China College of Transportation Engineer Tongji University

The objective of this study is to improve the methods of determining unimpeded（nominal） taxiing time,which is the reference time used for estimating taxiing delay,a widely accepted performance indicator of airport surface *** reviewing existing methods used widely by different air navigation service providers（ANSP）,new methods relying on computer software and statistical tools,and econometrics regression models are *** models are highly recommended because they require less detailed data and can serve the needs of general performance analysis of airport surface *** proposed econometrics model outperforms existing ones by introducing more explanatory variables,especially taking aircraft passing and over-passing into the considering of queue length calculation and including runway configuration,ground delay program,and weather *** length of the aircraft queue in the taxiway system and the interaction between queues are major contributors to long taxi-out *** proposed method provides a consistent and more accurate method of calculating taxiing delay and it can be used for ATM-related performance analysis and international comparison.

关键词： Aircraft taxiing Airport performance Econometric regression modeling Queue length Simulation analysis Taxiway system

Finite-time adaptive sliding mode control for heavyweight airdrop operations

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Journal of Systems Engineering and Electronics 2017年第2期28卷 338-346页

作者： ri Liu Xiuxia Sun Wenhan Dong Dong wang Aeronautics and Astronautics Engineering College Air Force Engineering University Xi’an 710038 China

This paper investigates the problem of designing a fast convergent sliding mode flight controller of a transport aircraft for heavyweight airdrop operations in the presence of bounded uncertainties without the prior knowledge of the bounds. On the basis of feedback linearization of the aircraft-cargo motion system, a novel integral sliding mode flight control law with gains adaptation is proposed. It contains a nominal control law used to achieve finite-time stabilization performance and a compensated control law used to reject the uncertainties. The switching gains of the compensated control law are tuned using adaptation algorithms, and the knowledge of the bounds of the uncertainties is not required to be known in advance. Meanwhile, the severe chattering of the sliding mode control that caused by high switching gains is effectively reduced. The controller and its performance are evaluated on a transport aircraft performing a maximum load airdrop task in a number of simulation scenarios.

关键词： flight control nonlinear system sliding mode control adaptive control finite-time stability

Intravitreal triamcinolone versus intravitreal bevacizumab for diabetic macular edema:a meta-analysis

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International Journal of Ophthalmology(English edition) 2013年第4期6卷 546-552页

作者： Xiao-Ling Zhang Jian Chen ri-Jia Zhang Wen-Jie wang qing Zhou Xiao-Yan Qin Department of Ophthalmology the First Affiliated Hospital of Jinan University

AIMTo compare the efficacy of the sole intravitreal triamcinolone (IVT) versus intravitreal bevacizumab (IVB) alone or IVB combined with IVT in the treatment of diabetic macular edema (DME).

关键词： triamcinolone bevacizumab diabetic macular edema meta-analysis

Experiments on unsteady vortex flowfield of typical rotor airfoils under dynamic stall conditions

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Chinese Journal of Aeronautics 2016年第2期29卷 358-374页

作者： wang qing Zhao Qijun National Key Laboratory of Science and Technology on Rotorcraft Aeromechanics Nanjing University of Aeronautics and Astronautics

A new experiment for airfoil dynamic stall is conducted by employing the advanced par- ticle image velocimetry （PIV） technology in an open-return wind tunnel. The aim of this experimen- tal investigation is to demonstrate the influences of different motion parameters on the convection velocity, position and strength of leading edge vortex （LEV） of airfoil under different dynamic stall conditions. Two different typical rotor airfoils, OA209 and SC1095, are measured at different free stream velocities, oscillation frequencies, and angles of attack. It is demonstrated by the measured data that the airfoil with larger leading edge radius could notably decrease the strength of LEV. The angle of attack （AoA） of airfoil can obviously influence the dynamic stall characteristics of airfoil, and the LEV would be effectively inhibited by decreasing the mean pitch angle. In addition, the con- vection velocity of LEV is estimated in this measurement, and the results demonstrate that the influ- ence of airfoil shape on convection velocity of LEV is limited, but the convection velocity of LEV would be increased by enlarging the oscillation frequency. Meanwhile, the convection velocity of LEV is a time variant value, and this value would increase as the LEV convects to the trailing edge of airfoil.

关键词： Convection velocity Dynamic stall Leading edge vortex PIV Rotor airfoil

Synthesis and Magnetic Properties of a Novel Birnessite Oxide Cs_(0.24)MnO_2

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Chinese Journal of Structural Chemistry 2008年第2期27卷 215-219页

作者： PAN Ying-Zhen QIU Xiao-qing QIHE ri-Ma LI Li-Ping State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The synthesis of a novel birnessite structure manganese oxide, Cs0.24MnO2, via a modified sol-gel route is reported in this work. The product was characterized by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, thermogravimetric analysis （TGA）, and magnetic susceptibility. It is found that Cs0.24MnO2 crystallizes in a monoclinic phase with a nanosheet morphology. With lowering the temperature, Cs0.24MnO2 shows an antiferromagnetic transition at about 43.8 K, which is different from its paramagnetic K-counterpart. The effective moment of Mn ions in Cs0.24MnO2 is determined to be 4.2 μB, indicating a mixed valence of Mng＋/Mn3＋.

关键词： birnessite magnetic antiferromagnetic

Sampling Moiré method for full-field deformation measurement: A brief review

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Theoretical & Applied Mechanics Letters 2022年第1期12卷 42-48页

作者： qinghua wang Shien ri Research Institute for Measurement and Analytical Instrumentation National Metrology Institute of Japan(NMIJ)National Institute of Advanced Industrial Science and Technology(AIST)1-1-1 UmezonoTsukuba 305-8568Japan

The sampling Moiré(SM) method is one of the vision-based non-contact deformation measurement methods, which is a powerful tool for structural health monitoring and elucidation of damage mechanisms of materials. In this review, the basic principle of the SM method for measuring the twodimensional displacement and strain distributions is introduced. When the grid is not a standard orthogonal grating and cracks exist on the specimen surface, the measurement methods are also stated. Two of the most typical application examples are described in detail. One is the dynamic deflection measurement of a large-scale concrete bridge, and the other is the residual thermal strain measurement of small-scale flip chip packages. Several further development points of this method are pointed out. The SM method is expected to be used for deformation measurement of various structures and materials for residual stress evaluation, crack location prediction, and crack growth evaluation on broad scales.

关键词： Displacement measurement Strain distribution Bridge Flip chip package