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Nano Materials Science 2022年第4期4卷 322-338页

作者： Majid Farahmandjou Shuoqing Zhao Wei-hong Lai Bing Sun Peter.h.L.Notten Guoxiu Wang Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology SydneySydneyNSW2007Australia Department of Chemical Engineering and Chemistry Eindhoven University of Technology5600MBEindhoventhe Netherlands Fundamental Electrochemistry(IEK9) Forschungszentrum JülichD-52425JülichGermany

Lithium-rich oxide compounds have been recognized as promising cathode materials for high performance Li-ion batteries,owing to their high specific ***,it remains a great challenge to achieve the fully reversible anionic redox reactions to realize high capacity,high stability,and low voltage hysteresis for lithiumrich cathode ***,it is critically important to comprehensively understand and control the anionic redox chemistry of lithium-rich cathode materials,including atomic structure design,and nano-scale materials engineering ***,we summarize the recent research progress of lithium-rich cathode materials with a focus on redox ***,we highlight the oxygen-based redox reactions in lithium-rich metal oxides,with critical views of designing next generation oxygen redox lithium cathode ***,we purposed the most promising strategies for improving the performances of lithium-rich cathode materials with a technology-spectrum from the atomic scale to nano-scale.

关键词： Oxygen redox chemistry Lithium-rich cathode Li-ion batteries Atomic structure Nano-engineering

Crack initiation of granite under uniaxial compression tests:A comparison study

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第3期12卷 656-666页

作者： G.K.Zhang h.B.Li M.Y.Wang X.F.Li State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China School of Mechanical Engineering Nanjing University of Science and TechnologyNanjing210094China University of Chinese Academy of Sciences Beijing100049China

In this study,a combination of acoustic emission(AE)method(AEM)and wave transmission method(WTM)is used to investigate the behaviors of AE and ultrasonic properties corresponding to initial fracturing in granitic *** relationships of AE characteristics,frequency spectra,and spatial locations with crack initiation(CI)are *** anisotropic ultrasonic characteristics,velocity distributions in different ray paths,wave amplitudes,and spectral characters of transmitted waves are *** identify CI stress,damage initiations characterized by strain-based method(SBM),AEM and WTM are *** granite samples,it shows that the ratio of CI stress to peak strength estimated by SBM ranges from 0.4 to 0.55,and 0.49-0.6 by WTM,which are higher than that of AEM(0.38-0.46).The CI stress identified by AEM indicates the onset of microcracking,and the combination of AEM and WTM provides an insight into the detection of rock damage initiation and anisotropy.

关键词： Crack initiation(CI)stress Acoustic emission(AE) Ultrasonic transmission Wave velocity Granite

Dynamic Modeling of the Feed Drive System of a CNC Metal Cutting Machine

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Sound & Vibration 2021年第1期55卷 19-30页

作者： h.heydarnia I.A.Kiselev M.M.Ermolaev S.Nikolaev Department of Applied Mechanics Bauman Moscow State Technical UniversityMoscowRussia Department of Bases of Machine Designing Bauman Moscow State Technical UniversityMoscowRussia Skolkovo Institute of Science and Technology MoscowRussia

Studying the vibrational behavior of feed drive systems is important for enhancing the structural performance of computer numerical control(CNC)*** preload on the screw and nut position have a great influence on the vibration characteristics of the feed drive as two very important operational *** acceleration of the screw also affects the performance of the CNC feed drive when machining small *** paper investigates the influence of preload and nut position on the vibration characteristics of the feed drive system of a CNC metal cutting machine in order to be able to eliminate an observed resonance occurred at high rotational speeds of the screw,corresponding to high feed ***,rational structural parameters of the feed drive system are selected in order to increase the rotational acceleration for improving the performance of the CNC *** and analyses showed that by selecting specific parameters of feed drive system and simultaneously applying a certain value of preload,a 97%increase in rotational acceleration and 30%time reduction considering the vibration resistance at high rotational speeds can be achieved.

关键词： Machining performance CNC machine tools vibration characteristics machine tool dynamic modeling

Expansion of GARP-Expressing CD4^(+)CD25^(-)FoxP3^(+)T Cells and SATB1Association with Activation and Coagulation in Immune Compromised hIV-1-Infected Individuals in South Africa

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Virologica Sinica 2021年第5期36卷 1133-1143页

作者： Eman Teer Danzil E.Joseph Leanne Dominick Richard h.Glashoff M.Faadiel Essop Centre for Cardio-Metabolic Research in Africa(CARMA) Department of Physiological SciencesStellenbosch UniversityStellenbosch 7600South Africa Division of Medical Microbiology and Immunology Department of PathologyStellenbosch University and NHLSCape Town 7505South Africa

Although antiretroviral treatment lowers the burden of human immunodeficiency virus(hIV)-related disease,it does not always result in immunological *** manifests as persistent chronic inflammation,immune activation or exhaustion that can promote the onset of *** the exact function of regulatory T(Treg)cells in hIV remains unclear,this cross-sectional study investigated three expression markers(Forkhead box protein P3[FOXP3],glycoprotein A repetitions predominant[GARP],special AT-rich sequence binding protein 1[SATB1])and compared their expansion between CD4^(+)CD25^(-)and CD4^(+)CD25^(++)T ***-matched study subjects were recruited(Western Cape,South Africa)and sub-divided:hIV-negative subjects(n=12),hIV-positive na(i|")ve treated(n=22),hIV-positive treated based on CD4 count cells/μL(CD4>500 and CD4hIV-treated based on viral load(VL)copies/mL(VL1000)(n=34).Markers of immune activation(CD38)and coagulation(CD142)on T cells(CD8)were assessed by flow cytometry together with FOXP3,GARP and SATB1 expression on CD4^(+)CD25^(-)and CD4^(+)CD25^(++)T *** levels of interleukin-10(IL-10;anti-inflammatory marker),IL-6(inflammatory marker)and D-dimer(coagulation marker)were *** study revealed three major findings in immuno-compromised patients with virological failure(CD41000):(1)the expansion of the unconventional Treg cell subset(CD4^(+)CD25^(-)FOXP3^(+))is linked with disease progression markers;(2)increased GARP expression in the CD4^(+)CD25^(-)and CD4^(+)CD25^(++)subsets;and(3)the identification of a strong link between CD4^(+)CD25^(-)SATB1+cells and markers of immune activation(CD8^(+)CD38^(+))and coagulation(CD8^(+)CD142^(+)and D-dimer).

关键词： human immunodeficiency virus(hIV) Regulatory T cells(Treg) Immune activation Progression markers Glycoprotein A repetitions predominant(GARP) Forkhead box protein P3(FOXP3)

Current and future pharmacological therapies for managing cirrhosis and its complications

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World Journal of Gastroenterology 2019年第8期25卷 888-908页

作者： David Kockerling Rooshi Nathwani Roberta Forlano Pinelopi Manousou Benjamin h Mullish Ameet Dhar Liver Unit/Division of Integrative Systems Medicine and Digestive Disease Imperial College London

Due to the restrictions of liver transplantation,complication-guided pharmacological therapy has become the mainstay of long-term management of *** article aims to provide a complete overview of pharmacotherapy options that may be commenced in the outpatient setting which are available for managing cirrhosis and its complications,together with discussion of current controversies and potential future ***/Medline/Cochrane Library were electronically searched up to December 2018 to identify studies evaluating safety,efficacy and therapeutic mechanisms of pharmacological agents in cirrhotic adults and animal models of ***-selective betablockers effectively reduce variceal re-bleeding risk in cirrhotic patients with moderate/large varices,but appear ineffective for primary prevention of variceal development and may compromise renal function and haemodynamic stability in advanced *** observational studies suggest protective,haemodynamically-independent effects of beta-blockers relating to reduced bacterial *** gut-selective antibiotic rifaximin is effective for secondary prophylaxis of hepatic encephalopathy;recent small trials also indicate its potential superiority to norfloxacin for secondary prevention of spontaneous bacterial *** remain the mainstay of uncomplicated ascites treatment,and early trials suggest alpha-adrenergic receptor agonists may improve diuretic response in refractory *** have not demonstrated clinical effectiveness in treating refractory ascites and may cause detrimental *** initial hepatotoxicity concerns,safety of statin administration has been demonstrated in compensated ***,statins are suggested to have protective effects upon fibrosis progression,decompensation and *** as to whether proton pump inhibitors cause gut-liver-brain axis dysfunction is *** evidence indicates that anticoa

关键词： Cirrhosis Beta-blockers Rifaximin Diuretics Statins Proton pump inhibitors Pharmacology

An Intelligent Multi-robot Path Planning in a Dynamic Environment Using Improved Gravitational Search Algorithm

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International Journal of Automation and computing 2021年第6期18卷 1032-1044页

作者： P.K.Das h.S.Behera P.K.Jena B.K.Panigrahi Department of Computer Sceime and Engineering and Information TechnologyVeer Surendra Sai University of TechnologyBurlaOdishaIndia Departmet of Mechanical Engineering Veer Surendra Sai University of TechnologyBurlaOdishaIndia Departmet of Electrical Engineering Indian Institute of TechnologyDelhiIndia

This paper proposes a new methodology to optimize trajectory of the path for multi-robots using improved gravitational search algorithm(IGSA) in clutter environment. Classical GSA has been improved in this paper based on the communication and memory characteristics of particle swarm optimization(PSO). IGSA technique is incorporated into the multi-robot system in a dynamic framework, which will provide robust performance, self-deterministic cooperation, and coping with an inhospitable environment. The robots in the team make independent decisions, coordinate, and cooperate with each other to accomplish a common goal using the developed IGSA. A path planning scheme has been developed using IGSA to optimally obtain the succeeding positions of the robots from the existing position in the proposed environment. Finally, the analytical and experimental results of the multi-robot path planning were compared with those obtained by IGSA, GSA and differential evolution(DE) in a similar environment. The simulation and the Khepera environment result show outperforms of IGSA as compared to GSA and DE with respect to the average total trajectory path deviation, average uncovered trajectory target distance and energy optimization in terms of rotation.

关键词： Gravitational search algorithm multi-robot path planning average total trajectory path deviation average uncovered trajectory target distance average path length

Check dam extraction from remote sensing images using deep learning and geospatial analysis:A case study in the Yanhe River Basin of the Loess Plateau,China

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Journal of Arid Land 2023年第1期15卷 34-51页

作者： SUN Liquan GUO huili ChEN Ziyu YIN Ziming FENG hao WU Shufang Kadambot h M SIDDIQUE Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas Ministry of EducationNorthwest A&F UniversityYangling 712100China Institute of Water-Saving Agriculture in Arid Areas of China Northwest A&F UniversityYangling 712100China College of Water Resources and Architectural Engineering Northwest A&F UniversityYangling 712100China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100China The UWA Institute of Agriculture and School of Agriculture&Environment The University of Western AustraliaPerth 6001Australia

Check dams are widely used on the Loess Plateau in China to control soil and water losses,develop agricultural land,and improve watershed *** information on the number and spatial distribution of check dams is critical for quantitatively evaluating hydrological and ecological effects and planning the construction of new ***,this study developed a check dam detection framework for broad areas from high-resolution remote sensing images using an ensemble approach of deep learning and geospatial ***,we made a sample dataset of check dams using GaoFen-2(GF-2)and Google Earth ***,we evaluated five popular deep-learning-based object detectors,including Faster R-CNN,You Only Look Once(version 3)(YOLOv3),Cascade R-CNN,YOLOX,and VarifocalNet(VFNet),to identify the best one for check dam ***,we analyzed the location characteristics of the check dams and used geographical constraints to optimize the detection ***,recall,average precision at intersection over union(IoU)threshold of 0.50(AP_(50)),IoU threshold of 0.75(AP_(75)),and average value for 10 IoU thresholds ranging from 0.50-0.95 with a 0.05 step(AP_(50-95)),and inference time were used to evaluate model *** the five deep learning networks could identify check dams quickly and accurately,with AP_(50-95),AP_(50),and AP_(75)values higher than 60.0%,90.0%,and 70.0%,respectively,except for *** VFNet had the best performance,followed by *** proposed framework was tested in the Yanhe River Basin and yielded promising results,with a recall rate of 87.0%for 521 check ***,the geographic analysis deleted about 50%of the false detection boxes,increasing the identification accuracy of check dams from 78.6%to 87.6%.Simultaneously,this framework recognized 568 recently constructed check dams and small check dams not recorded in the known check dam survey *** extraction results will support efficient watershed management and

关键词： check dam deep learning geospatial analysis remote sensing Faster R-CNN Loess Plateau

Self-pulsing Instability in Two-PhotonLasers of the Class B

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Chinese Journal of Lasers 1996年第1期B5卷 47-60页

作者： ZhANG Jiyue(Northwest Univeristy, Xian 710069, China) h. haken(Stuttgart University, Germany) Northwest Univ Xi'an China

The self-pulsing instability in two-photon laser systems of the so-called B is analysised in detail by making use of hopf bifurcation theory. The result shows that the selfpulsing instability may occur under appropriate conditions. The time-periodic solutions are obtained analytically. And the stability of the periodic solutions is also discussed.

关键词： two-photon lasers of the class B self-pulsing instability

Mapped Finite Element Discrete Variable Representation

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Chinese Journal of Chemical Physics 2013年第6期26卷 755-764,I0005页

作者： De-quan Yu Shu-lin Cong Dong h. Zhang Zhi-gang Sun School of Physics and Optoelectronic TechnoloEy Dalian University of Technology Dalian 116024China State Key Laboratory of Molecular Reaction Dynamics and Center for Theoretical and ComputationalChemistry Dalian Institute of Chemical Physics Chinese Academy of Science Dalian 116023 China

Efficient numerical solver for the SchrSdinger equation is very important in physics and chemistry. The finite element discrete variable representation （FE-DVR） was first proposed by Rescigno and Mc-Curdy [Phys. Rev. A 62, 032706 （2000）] for solving quantum-mechanical scattering problems. In this work, an FE-DVR method in a mapped coordinate was proposed to improve the efficiency of the original FE-DVR method. For numerical demonstration, the proposed approach is applied for solving the electronic eigenfunctions and eigenvalues of the hydrogen atom and vibrational states of the electronic state 3E＋ of the Cs2 molecule which has long-range interaction potential. The numerical results indicate that the numerical efficiency of the original FE-DVR has been improved much using our proposed mapped coordinate scheme.

关键词： Discrete variable representation Mapped Fourier method Ultra-cold atomic photoassociation Schrodinger equation solver Singularity of Coulomb potential

New proposed method for prediction of reservoir sedimentation distribution

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International Journal of Sediment Research 2015年第3期30卷 235-240页

作者： h.hosseinjanzadeh K.hosseini K.Kaveh S.F.Mousavi Faculty of Civil Engineering Semnan University

Prediction of sediment distribution in reservoirs is an important issue for dam designers to determine the reservoir active storage *** proposed to calculate sediment distribution are varied,and mainly *** all the methods currently available,only area-reduction and areaincrement methods are considered as the principal methods for prediction of sediment *** this paper,data of 16 reservoirs in the United States are used to propose a new empirical method for prediction of sediment distribution in *** the proposed method,reservoir sediment distribution is related to sediment volume and original reservoir *** validate the accuracy of the new proposed method,obtained results are compared with survey data for two *** results of this investigation showed that the proposed method has an acceptable accuracy.

关键词： Reservoir classification Reservoir coefficient Depth-capacity equation