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Origin of enhanced electrochemical performance in lithium-rich cathode materials via the fast ion conductor Li_(2)O-B_(2)O_(3)-LiBr

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Particuology 2024年第11期94卷 245-251页

作者： yang You Hanhui liu Mingliang yuan School of Mineral Processing and Bioengineering Central South UniversityChangsha410083China

Lithium-rich cathode materials have garnered significant attention in the energy sector due to their high specific ***,severe capacity degradation impedes their large-scale *** employment of fast ion conductors for coating has shown potential in improving their electrochemical performance,yet the structural and chemical mechanisms underlying this improvement remain *** this study,we systematically analyze,through first-principles calculations,the mechanism by which Li_(2)O-B_(2)O_(3)-LiBr(Hereafter referred to as LBB)coating enhances the electrochemical performance of the lithium-rich layered cathode material 0.5Li2MnO3·0.5LiNi1/3Co1/3Mn1/3O2(Hereafter referred to as OLO).Our calculations reveal that the LBB coating introduces a more negative valence charge(average−0.14 e)around the oxygen atoms surrounding transition metals,thereby strengthening metal-oxygen *** interaction mitigates irreversible oxygen oxidation caused by anionic redox reactions under high voltages,reducing irreversible structural changes during battery ***,while the migration barrier for Li+in OLO is 0.61 eV,the LBB coating acts as a rapid conduit during the Li+deintercalation process,reducing the migration barrier to 0.32 eV and slightly lowering the internal migration barrier within OLO to 0.43 *** of binding energies to electrolyte byproducts HF before and after coating(at−7.421 and−3.253 eV,respectively)demonstrate that the LBB coating effectively resists HF *** electrochemical performance studies corroborated these *** OLO cathode with a 2%LBB coating exhibited a discharge capacity of 157.12 mAh g^(−1) after 100 cycles,with a capacity retention rate of 80.38%,whereas the uncoated OLO displayed only 141.67 mAh g^(−1) and a 72.45%capacity *** a 2 C rate,with the 2 wt%LBB-coated sample maintaining a discharge capacity of 140.22 mAh g^(−1) compared to only 107.02 mAh g^(−1) for the unco

关键词： First-principles calculations Li_(2)O-B_(2)O_(3)-LiBr coating Fast ion conductor Lithium-rich cathode materials

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Remote sensing image encryption algorithm utilizing 2D Logistic memristive hyperchaotic map and SHA-512

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Science China(Technological Sciences) 2024年第5期67卷 1553-1566页

作者： LAI Qiang liu yuan yang Liang School of Electrical and Automation Engineering East China Jiaotong UniversityNanchang330013China

The two-dimensional Logistic memristive hyperchaotic map(2D-LMHM)and the secure hash SHA-512 are the foundations of the unique remote sensing image encryption algorithm(RS-IEA)suggested in this *** proposed map is formed from the improved Logistic map and the memristor,which has wide phase space and hyperchaotic range and is exceptionally excellent to be utilized in specific *** proposed image algorithm uses the permutation-assignment-diffusion *** generates two position matrices in a progressive manner to achieve an efficient random exchange of pixel positions,assignment is carried through on the image pixels of the permutated image to entirely remove the original image information,strengthening the relationship between permutation and diffusion,and loop diffusion in two different directions can use subtle changes of pixels to affect the whole *** random key and plain-image SHA-512 hash values are used to produce an additional key,which is then utilized to figure out the permutation parameters and the initial value of a chaotic *** experimental results with the average NPCR=99.6094%(NPCR:number of pixels change rate),average UACI=33.4638%(UACI:unified average changing intensity),100%pass rate of the targets in the test set,the average correlation coefficient is 0.00075,and the local information entropy is 7.9025,which shows that the algorithm is able to defend against a variety of illegal attacks and provide more trustworthy protection than some of the existing state-of-the-art algorithms.

关键词： chaos memristive hyperchaotic map remote sensing SHA-512 image encryption RS-IEA

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Recent progresses of NMOS and CMOS logic functions based on two-dimensional semiconductors

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Nano Research 2021年第6期14卷 1768-1783页

作者： Lingan Kong yang Chen yuan liu Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education School of Physics and ElectronicsHunan UniversityChangsha410082China

Metal-oxide-semiconductor field effect transistors(MOSFET)based on two-dimensional(2D)semiconductors have attracted extensive attention owing to their excellent transport properties,atomically thin geometry,and tunable *** improving the transistor performance of individual device,lots of efforts have been devoted to achieving 2D logic functions or integrated circuit towards practical *** this review,we discussed the recent progresses of 2D-based logic *** will first start with the different methods for realization of n-type metal-oxide-semiconductor(NMOS)-only(or p-type metal-oxide-semiconductor(PMOS)-only)logic ***,various device polarity control and complementary-metal-oxide-semiconductor(CMOS)approaches are summarized,including utilizing different 2D semiconductors with intrinsic complementary doping,charge transfer doping,contact engineering,and electrostatics *** will discuss the merits and drawbacks of each approach,and lastly conclude with a short perspective on the challenges and future developments of 2D logic circuit.

关键词： field effect transistors two-dimensional semiconductors logic circuit complementary-metal-oxide-semiconductor(CMOS) polarity control

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Impact of capillary pressure on permeability impairment during CO2 injection into deep saline aquifers

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Journal of Central South University 2013年第8期20卷 2293-2298页

作者： WANG yuan liu yang Key Laboratory for Geomechanics and Embankment Engineering of Ministry of Education (Hohai University) Nanjing 210098 China College of Civil and Transportation Engineering Hohai University Nanjing 210098 China

During CO2 injection in deep saline aquifers, salt precipitation happens around the injection well because of capillary driven back flow, inducing permeability impairment. The permeability impairment affects CO2 injectivity and migration. Different values of three characteristic parameters for capillary pressure function (air entry pressure, empirical parameter m and liquid residual saturation) as well as input absolute value of maximum capillary are chosen in numerical simulation to figure out their effects on salt precipitation. Verma & Pruess model is then used for quantifying permeability impairment. Results show that permeability decreases with higher air entry pressure, larger liquid residual saturation, and especially smaller value of empirical parameter m. To enhance CO2 injectivity and avoid blocking of CO2 migration, a homogenous formation with large pore size should be chosen before CO2 injection into deep saline aquifer.

关键词： permeability impairment solid precipitation capillary pressure back flow characteristic parameters

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Locally Enhanced Flow and Electric Fields Through a Tip Effect for Efficient Flow‑Electrode Capacitive Deionization

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Nano-Micro Letters 2025年第2期17卷 1-17页

作者： Ziquan Wang Xiangfeng Chen yuan Zhang Jie Ma Zhiqun Lin Amor Abdelkader Maria‑Magdalena Titirici Libo Deng College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Research Center for Environmental Functional Materials College of Environmental Science and EngineeringTongji University1239 Siping RoadShanghai 200092People’s Republic of China Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore Department of Engineering Faculty of Science and TechnologyBournemouth UniversityTalbot CampusFern BarrowPooleEngland BH125BBUK Institut de Chimie de Nice UniversitéCôte d’AzurUMR CNRS 727228 Av.Valrose06108 NiceFrance Department of Chemical Engineering Imperial College LondonSouth Kensington CampusExhibition RdLondon SW72AZUK

Low-electrode capacitive deionization(FCDI)is an emerging desalination technology with great potential for removal and/or recycling ions from a range of ***,it still suffers from inefficient charge transfer and ion transport kinetics due to weak turbulence and low electric intensity in flow electrodes,both restricted by the current ***,a new tip-array current collector(designated as T-CC)was developed to replace the conventional planar current collectors,which intensifies both the charge transfer and ion transport *** effects of tip arrays on flow and electric fields were studied by both computational simulations and electrochemical impedance spectroscopy,which revealed the reduction of ion transport barrier,charge transport barrier and internal *** the voltage increased from 1.0 to 1.5 and 2.0 V,the T-CC-based FCDI system(T-FCDI)exhibited average salt removal rates(ASRR)of 0.18,0.50,and 0.89μmol cm^(-2) min^(-1),respectively,which are 1.82,2.65,and 2.48 folds higher than that of the conventional serpentine current collectors,and 1.48,1.67,and 1.49 folds higher than that of the planar current ***,with the solid content in flow electrodes increased from 1 to 5 wt%,the ASRR for T-FCDI increased from 0.29 to 0.50μmol cm^(-2) min^(-1),which are 1.70 and 1.67 folds higher than that of the planar current ***,a salt removal efficiency of 99.89%was achieved with T-FCDI and the charge efficiency remained above 95%after 24 h of operation,thus showing its superior long-term stability.

关键词： Flow-electrode Capacitive deionization Current collector Tip effect Desalination

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Elastoplastic Contact Mechanics Model of Rough Surface Based on Fractal Theory

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Chinese Journal of Mechanical Engineering 2017年第1期30卷 207-215页

作者： yuan yuan GAN Li liu Kai yang Xiaohui School of Mechanical and Precision Instrument Engineering Xi'an University of Technology School of Mechanical Engineering Xi'an Jiaotong University

Because the result of the MB fractal model contradicts with the classical contact mechanics, a revised elastoplastic contact model of a single asperity is developed based on fractal theory. The critical areas of a single asperity are scale dependent, with an increase in the contact load and contact area, a transition from elastic, elastoplastic to full plastic deformation takes place in this order. In considering the size distribution function, analytic expression between the total contact load and the real contact area on the contact surface is obtained. The elastic, elastoplastic and full plastic contact load are obtained by the critical elastic contact area of the biggest asperity and maximun contact area of a single asperity. The results show that a rough surface is firstly in elastic deformation. As the load increases, elastoplastic or full plastic deformation takes place. For constant characteristic length scale G, the slope of load-area relation is proportional to fractal dimension D. For constant fractal dimension D, the slope of load-area relation is inversely proportional to G. For constant D and G, the slope of load-area relation is inversely proportional to property of the material ~b, namely with the same load, the material of rough surface is softer, and the total contact area is larger. The contact mechanics model provides a foundation for study of the friction, wear and seal performance of rough surfaces.

关键词： rough surfaces asperities fractal theory contact model

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专家系统应用于证券投资分析的初步探讨

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沈阳工业大学学报 2000年第S1期22卷 21-23页

作者：刘阳尹铁源沈阳工业大学信息科学与工程学院辽宁沈阳110023

探讨了一种将计算机专家系统技术应用于证券投资分析的方法．所设计的专家系统为基于规则的专家系统，采用混合式控制策略，具有不确定性推理控制的功能．针对专家系统推理控制过程中所用的辅助数据的两种形式（离散型和连续型）具体设... 详细信息

探讨了一种将计算机专家系统技术应用于证券投资分析的方法．所设计的专家系统为基于规则的专家系统，采用混合式控制策略，具有不确定性推理控制的功能．针对专家系统推理控制过程中所用的辅助数据的两种形式（离散型和连续型）具体设计了可信度计算的方法．

关键词：专家系统推理可信度概率证券投资

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工业化住宅建筑外窗系统防水密封技术要求

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中国建筑防水 2017年第13期 30-33,42页

作者：袁涛章永洁刘月莉袁扬杜争中国建筑科学研究院北京100013 北京市可持续发展促进会北京100084

CECS 437:2016《工业化住宅建筑外窗系统技术规程》于2016年9月1日起实施。该标准提出了建筑标准化外窗系统的材料选择、加工制作、设计、安装维护、工程质量验收等方面的技术要求,具有创新、实用的工程应用价值,填补了我国工业化住宅... 详细信息

CECS 437:2016《工业化住宅建筑外窗系统技术规程》于2016年9月1日起实施。该标准提出了建筑标准化外窗系统的材料选择、加工制作、设计、安装维护、工程质量验收等方面的技术要求,具有创新、实用的工程应用价值,填补了我国工业化住宅建筑外窗系统技术的空白。本文重点阐述其中有关工业化住宅建筑外窗系统防水密封性的技术要求。

关键词：标准化外窗工业化住宅防水密封节能标准

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A Synthetic Framework for Evaluating and Designing an Anthropomorphic Prosthetic Hand

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Journal of Bionic Engineering 2018年第1期15卷 69-82页

作者： Li Jiang yuan liu Dapeng yang Hong liu State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin 150080 China

The mimic of aesthetics, fianction, and rehabilitation application makes the prosthetic hand design an interdisciplinary, synthetic work. Prosthetic hands should be designed in a comprehensive consideration with a synthetic framework from multiple areas. In this case, a synthetic framework containing 12 anthropomorphism indexes is established and utilized to understand the human hand characteristic and quantifiably evaluate the anthropomorphism of a prosthetic hand. Our quantified evaluation results show that a Global Anthropomorphic Score （GAS） of the current commercial prosthetic hands is only 45.2%. The compliance, coupling speed ratio and configuration of the Degrees Of Freedom （DOF） are found to be the lowest three anthropomorphism evaluation indexes in all 12 indexes. In addition, a design priority is proposed based on the quantified evaluation results and contributes to a prosthetic hand design. Moreover, our correlation analysis results between each index and GAS show that, compared with the conventional evaluation index-grasp gesture, the rotation axis distribution index has a stronger distinguishing capability to the hand performance. Finally, a flowchart of prosthetic hand design was presented for a designer to design a prosthetic hand with a high anthropomorphism.

关键词： prosthetic hand anthropomorphism quantified evaluation bionic design mechanical implementation rehabilitation

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Mechanism of inflammatory response and therapeutic effects of stem cells in ischemic stroke:current evidence and future perspectives

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Neural Regeneration Research 2025年第1期20卷 67-81页

作者： Yubo Wang Tingli yuan Tianjie Lyu Ling Zhang Meng Wang Zhiying He Yongjun Wang Zixiao Li Vascular Neurology Department of NeurologyBeijing Tiantan HospitalCapital Medical UniversityBeijingChina China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Shanghai Engineering Research Center of Stem Cells Translational Medicine ShanghaiChina National Center for Healthcare Quality Management in Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Institute for Regenerative Medicine Shanghai East HospitalSchool of Life Sciences and TechnologyTongji UniversityShanghaiChina Chinese Institute for Brain Research BeijingChina Research Unit of Artificial Intelligence in Cerebrovascular Disease Chinese Academy of Medical SciencesBeijingChina Beijing Engineering Research Center of Digital Healthcare for Neurological Diseases BeijingChina

Ischemic stroke is a leading cause of death and disability worldwide,with an increasing trend and tendency for onset at a younger ***,in particular,bears a high burden of stroke *** recent years,the inflammatory response after stroke has become a research hotspot:understanding the role of inflammatory response in tissue damage and repair following ischemic stroke is an important direction for its *** review summarizes several major cells involved in the inflammatory response following ischemic stroke,including microglia,neutrophils,monocytes,lymphocytes,and ***,we have also highlighted the recent progress in various treatments for ischemic stroke,particularly in the field of stem cell ***,understanding the complex interactions between inflammation and ischemic stroke can provide valuable insights for developing treatment strategies and improving patient *** cell therapy may potentially become an important component of ischemic stroke treatment.

关键词： cell therapy immune cell inflammatory ischemic stroke stem cell

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