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Evaluating Methods of.Visual Assistance f.r Workers to Improve Quality and Usability in Individualized Kitchen Cabinet Assembly

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j.urnal of.Computer and Communications 2024年第2期12卷 156-172页

作者： Albert Ef. Michael S. j. Walter Department of.Engineering Ansbach University of Applied Sciences Ansbach Germany

In times of.digitalisation, visual assistance systems in assembly are increasingly important. The design of.these assembly systems needs to be highly complex to meet the requirements. Due to the increasing number of.variants in production processes, as well as shorter innovation and product lif. cycles, assistance systems should improve quality and reduce complexity of.assembly processes. However, many large kitchen manuf.cturers still assemble kitchen cabinets manually, due to the high variety of.components, such as rails and f.ttings. This paper f.cuses on the analysis and evaluation of.virtual assistance systems to improve quality and usability in individualised kitchen cabinet assembly processes at a large German manuf.cturer. A solution is identif.ed and detailed.

关键词： Digitalisation Assembly Process Visual Assistance Usability Human-Centred Assembly Design

Observer Based Control f.r a Class of.Systems with Output Deadzone Nonlinearity

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Intelligent Control and Automation 2024年第3期15卷 95-107页

作者： Nizar j. Alkhateeb Hameed K. Ebraheem Department of.Electronic Engineering Technology College of Technological Studies Public Authority of Applied Education and Training (PAAET) Kuwait City Kuwait

In this paper, a combination of.model based adaptive design along with adaptive linear output f.edback controller is used to compensate f.r robotic manipulator with output deadzone nonlinearity. The deadzone dynamics are utilized to adaptively estimate the deadzone parameter and a switching f.nction is designed to eliminate the error produced in the adaptive observer dynamics. The overall design of.the closed loop system ensures stability in the BIBO criterion.

关键词： Adaptive Output Observer Deadzone Compensation Robot Manipulator Sliding Mode Control

Does the Redshif. Distribution of.Swif. Long GRBs Trace the Star-f.rmation Rate?

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International j.urnal of.Astronomy and Astrophysics 2024年第1期14卷 20-44页

作者： Ali M. Hasan Walid j. Azzam Department of.Physics College of Science University of Bahrain Sakhir Bahrain

Gamma-ray bursts (GRBs) are extremely powerf.l explosions that have been traditionally classif.ed into two categories: long bursts (LGRBs) with an observed duration T90 > 2 s, and short bursts (SGRBs) with an observed duration T90 T90 is the time interval during which 90% of.the f.uence is detected. LGRBs are believed to emanate f.om the core-collapse of.massive stars, while SGRBs are believed to result f.om the merging of.two compact obj.cts, like two neutron stars. Because LGRBs are produced by the violent death of.massive stars, we expect that their redshif. distribution should trace the star-f.rmation rate (Sf.). The purpose of.our study is to investigate the extent to which the redshif. distribution of.LGRBs f.llows and ref.ects the Sf.. We use a sample of.370 LGRBs taken f.om the Swif. catalog, and we investigate dif.erent models f.r the LGRB redshif. distribution. We also carry out Monte Carlo simulations to check the consistency of.our results. Our results indicate that the Sf. can describe the LGRB redshif. distribution well f.r high redshif. bursts, but it needs an evolution term to f.t the distribution well at low redshif..

关键词： Gamma-Ray Bursts Redshif. Distribution Star-f.rmation Rate

Oxidation and Coatings f.r Power Generation： New Super Ultra Critical Steam Turbines

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中国腐蚀与防护学报 2009年第4期29卷 318-319页

作者： f. j. PEREZ Grupo de Investigacion de Ingenieria de Superf.cies y Materiales Nanoestructurados U. C. M. N°910627 f.cultad de Ciencias Quimicas Universidad Complutense de Madrid. 28040 Madrid Spain

The steels with chromium contents between 9%and 12%wt are used f.r power plants with advanced steam oxidation *** present good creep properties as 9%Cr steels and good oxidation resistance,at the temperatures range between 500℃～600℃.In the last years numerous investigation in development of.coatings has been realized with the aim the protected them against the oxidation in order to allow operation of.steam turbines at 650℃.In this study,Al-Hf.protective coatings were deposited by CVD-f.R on f.rritic steel HCM-12A f.llowed by a dif.usion heat treatment,have shown to be protective at 650℃under steam f.r at least 3000 hours of.laboratory steam exposure under atmospheric *** and composition of.coatings were characterized by dif.erent techniques, such as scanning electron microscopy(SEM),electron probe microanalysis,and X-ray dif.raction(XRD). On the other hand,volatile species by mass spectrometry(MS) and thermogravimetric measurements (TG) during the initial stages oxidation of.the P92 f.rritic steel without and of.Al and Al/Si coating by chemical vapour deposition in f.uidized bed reactors(CVD-f.R) at 650℃in Ar+20%H_2O f.r 150 h were *** order to go f.rward to coatings design the Thermocalc code is used as base f.r the MSdata. TG-MS experiments were conducted in a closed steam loop in order to obtain inf.rmation about the oxyhydroxides f.rmation as reaction between coatings and *** those results the role of.the dif.erent coating element could be established and optimized f.r the coating *** oxidation mechanism based on the TG-MS results is *** morphology/composition and structure of.the oxidized samples were also studied using SEM/EDS and XRD techniques.

关键词：氧化金属腐蚀防护

地球演化历史中氧逸度变化对壳幔循环启动、风化和超大陆循环的指示

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Science Bulletin 2024年第1期69卷 97-102页

作者：王瑞邬绍宸 Roberto f.Weinberg William j.Collins Peter A.Cawood State Key Laboratory of.Geological Processes and Mineral Resources Institute of Earth SciencesChina University of GeosciencesBeijing 100083China f.ontiers Science Center f.r Deep-time Digital Earth China University of Geosciences(Beijing)Beijing 100083China School of.Earth Atmosphere and EnvironmentMonash UniversityClayton VIC 3800Australia The Institute f.r Geoscience Research Curtin UniversityPerth WA 6102Australia

We apply a zircon redox index to a global compilation of.detrital zircons to track the variation of.oxidation state,expressed asΔf.Q,through Earth's *** f.om I-type rocks,which comprise mantle and crustal igneous protoliths,including tonalite–trondhj.mite–granodiorites(TTGs),generally have a high oxidation state(Δf.Q>0).In contrast,zircons f.om igneous rocks derived f.om supracrustal source rocks(S-type)are commonly reduced(Δf.Qf.nction derived f.om the Gaussian-Kernel-Density-Estimation,we use the maximum likelihood estimation(MLE)to distinguish Stype f.om I-type zircons through Earth's history using zircon *** S-type magma production shows a ca.600 Ma cyclicity that is closely related to the supercontinent *** link a cyclic drop in redox values af.er 2.6 Ga to periodic S-type magma generation associated with burial and melting of.metasedimentary rocks during supercontinent assembly and ***Δf.Q of.the detrital zircons rise at~3.5 Ga f.llowed by a consistent averageΔf.Q>0 over the last 3 *** that the redox state of.magmas is independent of.crustal thickness and silica variation,and elevated values are likely more closely related to tectonic setting,we suggest that the consistent averageΔf.Q>0 f.om ca.3.5 Ga onwards relates to recycling of.oceanic lithosphere back into the mantle in what eventually became established as subduction *** more reduced magmas associated with sedimentary sources,became established at 2.6 Ga,presumably in response to continental rocks rising above sealevel,and f.llow peaks of.productivity associated with the supercontinent cycle.

关键词： Oxidation state Supercontinent Weathering Subduction Zircon Granite

Storing f.eshwater Versus Storing Electricity in Power Systems with High f.eshwater Electric Demand

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j.urnal of.Modern Power Systems and Clean Energy 2024年第2期12卷 323-333页

作者： Mubarak j.Al-Mubarak Antonio j.Conej. Department of.Electrical and Computer Engineering The Ohio State UniversityColumbusOHUSA Department of.Electrical Engineering Kuwait UniversityP.O.Box 5969Safat 13060Kuwait Department of.Integrated Systems Engineering and the Department of.Electrical and Computer Engineering The Ohio State UniversityColumbusOH 43210USA IEEE

We consider a power system whose electric demand pertaining to f.eshwater production is high(high f.eshwater electric demand),as in the Middle East,and investigate the tradeof. of.storing f.eshwater in tanks versus storing electricity in batteries at the day-ahead operation *** storing f.eshwater and storing electricity increase the actual electric demand at valley hours and decrease it at peak hours,which is generally benef.cial in term of.cost and ***,to what extent?We analyze this question considering three power systems with dif.erent generation-mix conf.gurations,i.e.,a thermal-dominated mix,a renewable-dominated one,and a f.lly renewable *** generation-mix conf.gurations are inspired by how power systems may evolve in dif.erent countries in the Middle *** production uncertainty is compactly modeled using chance *** draw conclusions on how both storage f.cilities(f.eshwater and electricity)complement each other to render an optimal operation of.the power system.

关键词： Power system operation f.eshwater production and transportation coordination day-ahead scheduling

f.rther investigation on the f.sion of.^(6)Li with ^(209)Bi target at near-barrier energies

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Chinese Physics C 2024年第7期48卷 106-117页

作者：张高龙焦振威张广鑫 M.R.Cortes 胡世鹏钱建强 D.Mengoni 屈卫卫李聪博郑云张焕乔孙慧斌王楠张春雷 j.j.Valiente-Dobón D.Testov M.Mazzocco A.Gozzelino C.Parascandolo D.Pierroutsakou M.La Commara A.Goasduf. D.Bazzacco D.R.Napoli f.Galtarossa f.Recchia A.Illana S.Bakes I.Zanon S.Aydin G.de Angelis M.Siciliano R.Menegazzo S.M.Lenzi j.L.f.rreira j.Rangel Serkan Akkoyun L.f.Canto j.Lubian School of.Physics Beihang UniversityBeijing 100191China Sino-f.ench Institute of.Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Instituto de f.sica Universidade Federal Fluminense24210-340NiteróiRio de JaneiroBrazil Institute f.r Advanced Study in Nuclear Energy&Saf.ty Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of.Research and Manuf.cture of.High Purity Germanium Materials and f.tectors Shenzhen UniversityShenzhen 518060China INf. Sezione di PadovaPadovaItaly Dipartimento di f.sica Astronomia dell'Universita di padova PadovaItaly State Key Laboratory of.Radiation Medicine and Protection School of Radiation Medicine and ProtectionSoochow UniversitySuzhou 215123China China Institute of.Atomic Energy Beijing 102413China The Key Laboratory of.Beam Technology and Material Modif.cation of.Ministry of.Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China INf. Laboratori Nazionali di LegnaroI-35020 LegnaroItaly INf. Sezione di NapoliI-80126 NapoliItaly Dipartimento di f.rmacia Universitàdi Napoli"Federico II"I-80131 NapoliItaly Department of.Natural and Mathematical Sciences Faculty of EngineeringTarsus University33480 MersinTurkiye Physics Division Argonne National LaboratoryLemont-ILUSA Departamento de Matemaética Física e Computaç˜ao Universidade do Estado do Rio de JaneiroFaculdade de Tecnologia27537-000ResendeRio de JaneiroBrazil Department of.Physics Sivas Cumhuriyet UniversitySivasTurkey Instituto de f.sica Universidade Federal do Rio de JaneiroCP 6852821941-972Rio de JaneiroBrazil

The complete and incomplete f.sion cross sections f.r ^(6)Li+^(209)Bi were measured using the in-beamγ-ray method around the Coulomb *** cross sections of.deuteron captured)incomplete f.sion(ICf.products were re-quantif.ed experimentally f.r this reaction *** results reveal that the ICf.cross section is equivalent to that of.complete f.sion(Cf.above the Coulomb barrier and dominant near or below the Coulomb barrier.A theoretical calculation based on the continuum discretized coupled channel(CDCC)method was perf.rmed f.r the af.rementioned Cf.and ICf.cross sections;the result is consistent with the *** universal f.sion f.nction(Uf.)was also compared with the measured Cf.cross section f.r dif.erent barrier parameters,demonstrating that the Cf.suppression f.ctor is signif.cantly inf.uenced by the choice of.potential,which can ref.ect both dynamic and static ef.ects of.breakup on the f.sion process.

关键词： cross section incomplete f.sion suppression f.ctor weakly bound nuclei

Generation of.polarized electron beams through self.inj.ction in the interaction of.a laser with a pre-polarized plasma

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High Power Laser Science and Engineering 2024年第3期12卷 62-68页

作者： L.R.Yin X.f.Li Y.j.Gu N.Cao Q.Kong M.Büscher S.M.Weng M.Chen Z.M.Sheng Key Laboratory of.Nuclear Physics and Ion-beam Application(MoE) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Laboratory of.High f.eld Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of.Scientif.c and Industrial Research) Osaka UniversityOsakaJapan Sichuan Research Institute Shanghai Jiao Tong UniversityChengduChina Peter Grünberg Institut(PGI-6) Forschungszentrum JülichJülichGermany Institut f.r Laser-und Plasmaphysik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Laboratory f.r Laser Plasmas(MoE) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of.If.A Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

Polarized electron beam production via laser wakef.eld acceleration in pre-polarized plasma is investigated by particlein-cell *** evolution of.the electron beam polarization is studied based on the Thomas±Bargmann±Michel±Telegdi equation f.r the transverse and longitudinal self.inj.ction,and the depolarization process is f.und to be inf.uenced by the inj.ction *** the case of.transverse self.inj.ction,as f.und typically in the bubble regime,the spin precession of.the accelerated electrons is mainly inf.uenced by the ***,in the case of.longitudinal inj.ction in the quasi-1D regime(f.r example,*** et al.,***.110,135002(2013)),the direction of.electron spin oscillates in the laser *** the electrons move around the laser axis,the net inf.uence of.the laser f.eld is nearly zero and the contribution of.the wakef.eld can be ***,an ultra-short electron beam with polarization of.99%can be obtained using longitudinal self.inj.ction.

关键词： laser wakef.eld acceleration longitudinal self.inj.ction particle-in-cell simulation polarized electron beam

Machine Learning and Statistical Analysis in Groundwater Monitoring f.r Total Dissolved Solids Assessment in Winkler County, Texas

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j.urnal of.Geoscience and Environment Protection 2024年第6期12卷 1-29页

作者： Azuka I. Udeh Osayamen j. Imarhiagbe Erepamo j. Omietimi Abdulqudus O. Mohammed Oluwatomilola Andre-Obayanj. Department of.Geoscience University of Texas Permian Basin Odessa USA Department of.Geology University of Pretoria Pretoria South Africa Department of.Geology University of Benin Benin Nigeria

This research aims to develop reliable models using machine learning algorithms to precisely predict Total Dissolved Solids (TDS) in wells of.the Permian basin, Winkler County, Texas. The data f.r this contribution was obtained f.om the Texas Water Development Board website (TWDB). f.ve hundred and ninety-three samples were obtained f.om two hundred and ninety-eight wells in the study area. The wells were drilled at dif.erent county locations into f.ve aquif.rs, including Pecos Valley, Dockum, Capitan Reef. Edward Trinity, and Rustler aquif.rs. A total of.f.urteen dif.erent water quality parameters were used, and they include Potential hydrogen (pH), Sodium, Chloride, Magnesium, f.uoride, TDS, Specif.c Conductance, Nitrate, Total Hardness, Calcium, Temperature, Well Depth, Sulphate, and Bicarbonates. f.ur machine learning regression algorithms were developed to get a good model to help predict TDS in this area: Decision Tree regression, Linear regression, Support Vector Regression, and K-nearest neighbor. The study showed that the Decision Tree produced the best model with attributes like the coef.icient of.determination R2 = 1.00 and 0.96 f.r the training and testing, respectively. It also produced the lowest score of.mean absolute error MAE = 0.00 and 0.04 f.r training and testing, respectively. This study will reduce the cost of.obtaining dif.erent water quality parameters in TDS determination by leveraging machine learning to use only the parameters contributing to TDS, thereby helping researchers obtain only the parameters necessary f.r TDS prediction. It will also help the authorities enact policies that will improve the water quality in areas where drinking water availability is a challenge by providing important inf.rmation f.r monitoring and assessing groundwater quality.

关键词： Machine Learning Regression Aquif.rs Winkler County Sinkholes