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作者： Weixin Zhang~1 Weiwu Ren~1 Yongping Qin~2 Shichun chen~1 Bowen Yang~1 1 Department of Missile Wuhan ordnance n.c.o Academy of PLA Wuhan china Huazhong University of Science & Technology Wuhan china

＜正＞With the advantages of high speed,high efficiency and low error rate,cAn—Ethernet is used to achieve the interconnecting communication in the research of a certain kind of missile simulation and detection *** cAn—Ethernet bridge is designed by utilizing the development board with the LPc2210 microcontroller as the core to achieve the mutual transformation between cAn data frame and ethernet date frame,making possible the mutual circulation of the two heterogeneous ***,UDP data transceiver is used at the end of ethernet,to improve the transmitting efficiency of *** the compiled software program is runned on this platform at last,it proves a good result,thus realizing the downlink of command and uplink of *** paper discusses the design method of bridge,the design of various ports among hardware parts as well as the implementation of cAn bus communication.

关键词： cAn BUS Simulative Test cAn-Ethemet network Bridge UDP communication.

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A visual navigation algorithm for mobile robot in semi-structured environment

A visual navigation algorithm for mobile robot in semi-struc...

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2011 IEEE International conference on computer Science and Automation Engineering(cSAE 2011)

作者： Yong Zhu changguo Sun Zhixin Han Key Laboratory of Advanced control of Iron and Steel Process (Ministry of Education) School of Automation.USTB Beijing P.R.china chaofa Yu Wuhan ordnance n.c.o Academy of PLA Wuhan P.R.china

To improve the performance of algorithm in real time and reduce the cost of system configuration,this paper presents a autonomous navigation method based on monocular vision for the application of mobile robot in semi-structured *** method includes image segmentation,information extraction and behavior *** order to solve the interference of the lights and shadows on the image segmentation,the method introduced similar measure,*** analyzing the boundary pixels of the results of segmentation,intersection information can be ***,by analyzing images from the robot closer,obstacle information can be *** the image segmentation and information extraction,the method gives the behavior of decision-making based on the kinematic model of four-wheel independent drive mobile robot when it encounters obstacles or *** last,the simulation verified the effectiveness of the method.

关键词： Similarity measure monocular vision information extraction mobile robot

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A Method of Estimating Reliability Distribution Model

A Method of Estimating Reliability Distribution Model

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第十五届工业工程与工程管理国际会议

作者： Qin Ming~(1 2) Wu Shijing~1 Zhu Enyong~1 Deng Mingxing~1 1 School of Power and Mechanical Engineering Wuhan University Wuhan P.R.china 430072 2 Wuhan ordnance n.c.o Academy of PLA Wuhan P.R.china 430075

＜正＞It is an important problem in reliability engineering to estimate reliability distribution *** surmount the limitation of hypothesis test in estimating reliability distribution model,one optimal method has been proposed in this *** neural network（BPnn） is designed to estimate distribution model on the condition that a great deal of historical data has been obtained in this *** simulation indicates that the way is rational and scientific.

关键词： Reliability Distribution Model BP neural network

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comparison of Perovskite Systems Based on AFeo_(3)(A=ce,La,Y)in co_(2) Hydrogenation to co

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Transactions of Tianjin University 2024年第4期30卷 337-358页

作者： Anna n.Matveyeva Shamil o.omarov Laboratory of Materials and Processes for Hydrogen Energy Ioff e Institute194021 St.PetersburgRussia

co_(2) is the most cost-eff ective and abundant carbon resource,while the reverse water-gas reaction(rWGS)is one of the most eff ective methods of co_(2) *** work presents a comparative study of rWGS activity for perovskite systems based on AFeo_(3)(where A=ce,La,Y).These systems were synthesized by solution combustion synthesis(ScS)with diff erent ratios of fuel(glycine)and oxidizer(φ),diff erent amounts of nH 4 no_(3),and the addition of alumina or silica as *** techniques,including X-ray diff raction analysis,thermogravimetric analysis,Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy,energy-dispersive X-ray spectroscopy,n 2-physisorption,H_(2) temper-ature-programmed reduction,temperature-programmed desorption of H_(2) and co_(2),Raman spectroscopy,and in situ FTIR,were used to relate the physicochemical properties with the catalytic performance of the obtained *** specifi c perovskite-containing system(either bulk or supported)has its own optimalφand nH_(4) no_(3) amount to achieve the highest yield and dispersion of the perovskite *** all synthesized systems,bulk ScS-derived La-Fe-o systems showed the highest resistance to reducing environments and the easiest hydrogen desorption,outperforming La-Fe-o produced by solgel combustion(SGc).co_(2) conversion into co at 600°c for bulk ferrite systems,depending on the A-cation type and preparation method,follows the order La(SGc)cecS).The diff erences in properties between La-Fe-o obtained by the ScS and SGc methods can be attributed to diff erent ratios of oxygen and lanthanum vacancy contributions,hydroxyl coverage,morphology,and free iron oxide *** situ FTIR data revealed that co_(2) hydrogenation occurs through formates generated under reaction conditions on the bulk system based on La-Fe-o,obtained by the ScS method.γ-Al_(2)o_(3) improves the dispersion of ceFeo_(3) and LaFeo_(3) phases,the specifi c surface area,and the quant

关键词： Perovskites LaFeo_(3) ceFeo_(3) YFeo_(3) Solution combustion synthesis co_(2) hydrogenation Reverse water–gas reaction(rWGS)

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Early Phases of Star Formation: Testing chemical Tools

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Research in Astronomy and Astrophysics 2024年第1期24卷 96-118页

作者： n.c.Martinez S.Paron conIcET-Universidad de Buenos Aires.Instituto de Astronomía y Física del Espacio Ciudad Universitaria(C1428EGA)Ciudad Autónoma de Buenos AiresArgentina

Star-forming processes strongly influence the ISM ***,many high-quality databases are available at millimeter *** them,it is possible to carry out studies that review and deepen previous *** these studies involve large samples of sources,it is preferred to use direct tools to study the molecular *** the aim of testing these tools such as the use of the Hcn/Hnc ratio as a thermometer,and the use of H^(13)co^(+),Hc_(3)n,n_(2)H^(+) and c_(2)H as "chemical clocks," we present a molecular line study toward 55 sources representing massive young stellar objects at different evolutionary stages:infrared dark clouds(IRDcs),highmass protostellar objects(HMPos),hot molecular cores(HMcs) and ultracompact H II *** found that the use of the Hcn/Hnc ratio as a universal thermometer in the ISM should be taken with care because the Hcn optical depth is a big issue that can affect the ***,this tool should be utilized only after a careful analysis of the Hcn spectrum,checking that no line,neither the main nor the hyperfine ones,presents absorption *** point out that the analysis of the emission of H^(13)co^(+),Hc_(3)n,n_(2)H^(+) and c_(2)H could be useful to trace and distinguish regions among IRDcs,HMPos and *** molecular line widths of these four species increase from the IRDc to the HMc stage,which can be a consequence of the gas dynamics related to the starforming processes taking place in the molecular *** results not only contribute with more statistics,acting as a probe of such chemical tools,useful to obtain information in large samples of sources,but also complement previous works through the analysis of other types of sources.

关键词： stars:formation ISM:molecules ISM:clouds

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Imprints of a gravitational wave through the weak field deflection of photons

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chinese Physics c 2024年第8期48卷 240-245页

作者： Reggie c.Pantig Ali Övgün Physics Department Mapúa University658 Muralla St.IntramurosManila 1002Philippines Physics Department Eastern Mediterranean UniversityFamagusta99628 North Cyprusvia Mersin 10Turkiye

In this study,we investigate the novel phenomenon of gravitational lensing experienced by gravitational waves traveling past a Schwarzschild black hole perturbed by a specific,first-order,polar gravitational *** apply the Gauss-Bonnet theorem,finding a topological contribution to the deflection of light rays passing near the black *** demonstrate that the deflection angle can be determined by analyzing a region entirely outside the path of the light ray,leading to a calculation based solely on the parameters of the perturbing wave(Legendre polynomial order,l;frequency,σ).This approach offers a unique perspective on gravitational lensing and expands our understanding of black hole interactions with gravitational waves.

关键词： supermassive black holes gravitational waves chaos weak deflection angle Gauss-Bonnet theorem

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Rotating effects on the photoionization.c.oss-section of a 2D quantum ring

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communications in Theoretical Physics 2024年第10期76卷 153-159页

作者： carlos Magno o Pereira Frankbelson dos S Azevedo Luís Fernando c Pereira Edilberto o Silva Departamento de Física Universidade Federal do Maranh?o

In this article, we investigate the nonrelativistic quantum motion of a charged particle within a rotating frame, taking into account the Aharonov–Bohm(AB) effect and a uniform magnetic field. our analysis entails the derivation of the equation of motion and the corresponding radial equation to describe the system. Solving the resulting radial equation enables us to determine the eigenvalues and eigenfunctions, providing a clear expression for the energy levels. Furthermore,our numerical analysis highlights the substantial influence of rotation on both energy levels and optical properties. Specifically, we evaluate the photoionization.c.oss-section with and without the effects of rotation. To elucidate the impact of rotation on the photoionization process of the system, we present graphics that offer an appealing visualization of the intrinsic nature of the physics involved.

关键词： Aharonov-Bohm effect photoionization.c.oss-section quantum ring rotating effect

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Machine learning in liver surgery:Benefits and pitfalls

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World Journal of clinical cases 2024年第12期12卷 2134-2137页

作者： Rafael calleja Manuel Durán María Dolores Ayllón Ruben ciria Javier Briceño Hepatobiliary Surgery and Liver Transplantation Unit Hospital Universitario Reina SofíaMaimonides Biomedical Research Institute of CordobaCórdoba 14004Spain

The application of machine learning(ML)algorithms in various fields of hepatology is an issue of ***,we must be cautious with the *** this letter,based on a published ML prediction model for acute kidney injury after liver surgery,we discuss some limitations of ML models and how they may be addressed in the *** the future faces significant challenges,it also holds a great potential.

关键词： Machine learning Liver surgery Artificial intelligence Random forest Prediction model

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Academic productivity correlates with industry earnings in foot and ankle fellowship programs in the United States:A retrospective analysis

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World Journal of orthopedics 2024年第2期15卷 129-138页

作者： Albert T Anastasio Anthony n Baumann Kempland c Walley Kyle J Hitchman conor o’neill Jonathan Kaplan Samuel B Adams Department of orthopedic Surgery Duke University HospitalDurhamNC 27710United States college of Medicine Northeast Ohio Medical UniversityRootstownOH 44272United States Department of orthopedic Surgery University of MichiganAnn ArborMI 48109United States School of osteopathic Medicine Campbell UniversityLillingtonNC 27546United States

BAcKGRoUnD The study investigates the connection between academic productivity and industry earnings in foot and ankle orthopedic surgery *** metrics like the H-index and open Payments Database(oPD)data,it addresses a gap in understanding the relationship between scholarly achievements and financial outcomes,providing a basis for further exploration in this specialized medical *** To elucidate the trends between academic productivity and industry earnings across foot and ankle orthopedic surgery fellowship programs in the United *** This study is a retrospective analysis of the relationship between academic productivity and industry earnings of foot and ankle orthopedic surgery fellowships at an individual faculty and fellowship *** productivity was defined via H-index and recorded from the Scopus *** earnings were recorded from the *** Forty-eight foot and ankle orthopedic surgery fellowships(100%of fellowships)in the United States with a combined total of 165 physicians(95.9%of physicians)were *** individual physician(n=165)total life-time earnings reported on the oPD website was United States Dollar(USD)451430.30±1851084.89(range:USD 25.16-21269249.85;median:USD 27839.80).Mean physician(n=165)H-index as reported on Scopus is 14.24±12.39(range:0-63;median:11).There was a significant but weak correlation between individual physician H-index and individual physician total life-time earnings(Pn’s rho=0.334)and a significant and moderate positive correlation between combined fellowship H-index and total life-time earnings per fellowship(P=0.004,Spearman’s rho=0.409).concLUSIon There is a significant and positive correlation between academic productivity and industry earnings at foot and ankle orthopedic surgery fellowships in the United *** observation is true on an individual physician level as well as on a fellowship level.

关键词： Sunshine act Foot and ankle orthopedic surgery orthopedic fellowship Industry earnings

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