检索结果-南通市图书馆

Impact of welding equipment on power quality

China Welding 2024年第3期33卷 44-51页

作者： kovács Attila Molnár Judit Jármai Károly Institute of Physics and Electrical Engineering Department of Electrical and Electronic Engineering Institutional DepartmentUniversity of MiskolcMiskolc H3515Hungary Institute of Energy and Chemical Engineering University of MiskolcMiskolc H3515Hungary

In an industrial facility,many electrical consumers can affect the quality of ***,the freedom from interference sources of these devices and equipment can be crucial for quality and uninterrupted electricity *** welding equipment is also a possible source of *** electrical harmonic injections created by welding equipment into the electrical network can affect the operation of other consumers connected to the given distribution points and cause unjustified overheating and shutdowns of some network *** aim of the research is to analyse the current harmonic injection of welding equipment of different types and modes of operation connected to the internal distribution network of the industrial *** effectiveness of the active harmonic filter built into the welding equipment was also examined in the *** results showed that the built-in active harmonic filter of the DC045 laser welding equipment was ineffective because the total harmonic distortion(thD)was about three times the 8%allowed by IEEE 519−2022 *** current harmonic injection of MIg 320 and MM403 type welding equipment was more than five times the permissible value of 5%.the current harmonic distortion of the PLAS140 type plasma-jet cutter equipment was below the 5% value allowed in the standard,thus it complied with *** on the measurement results,it can be concluded that the use of protection against harmonics is also necessary for welding ***,proposals were made in the paper to reduce the effect of harmonics.

关键词： electrical transients harmonic distortion electrical network disturbances voltage breaks total harmonic distortion(thD)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enabling technologies for Autonomous Robotic Systems in Manufacturing

引用

transactions of Nanjing University of Aeronautics and Astronautics 2024年第4期41卷 403-431页

作者： ERDŐS gábor ABAI Kristóf BEREgI Richárd CSEMPESZ János CSERtEg tamás gODÓgábor hAJÓS Mátyás hÁY Borbála hORVÁth Dániel hORVÁth gergely JUNIKIÁdám KEMÉNY Zsolt kovÁCS András NACSA János PANItI Imre PEDONE gianfranco tAKÁCS Emma tIPARY Bence ZAhORÁN László VÁNCZA József Institute for Computer Science and Control Hungarian Research Network(HUN-REN SZTAKI)BudapestHungary Department of Manufacturing Science and technology Budapest University of Technology and Economics(BME)BudapestHungary EPIC InnoLabs Nonprofit Ltd. BudapestHungary Eötvös Loránd University(ELtE) BudapestHungary

Research of autonomous manufacturing systems is motivated both by the new technical possibilities of cyber-physical systems and by the practical needs of the *** operation in semi-structured industrial environments can now be supported by advanced sensor technologies,digital twins,artificial intelligence and novel communication *** enable real-time monitoring of production processes,situation recognition and prediction,automated and adaptive(re)planning,teamwork and performance improvement by *** paper summarizes the main requirements towards autonomous industrial robotics and suggests a generic workflow for realizing such *** case studies will be presented from recent practice at hUN-REN SZtAKI in a broad range of domains such as assembly,welding,grinding,picking and placing,and *** various solutions have in common that they use a generic digital twin concept as their *** making general recommendations for realizing autonomous robotic solutions in the industry,open issues for future research will be discussed.

关键词： industrial robotics autonomy digital twin enabling technology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

In vivo and in vitro study of resorbable magnesium wires for medical implants:Mg purity,surface quality,Zn alloying and polymer coating

引用

Journal of Magnesium and Alloys 2024年第6期12卷 2472-2488页

作者： K.tesar J.Luňácková M.Jex M.Žaloudková R.Vrbová M.Bartoš P.Klein L.Vištejnová J.Dušková E.Filová Z.Sucharda M.Steinerová S.habr K.Balík A.Singh Department of Materials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of Physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental Medicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Department of Physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Department of Composites and Carbon Materials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatomy First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biomedical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Department of Pathological Physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Department of histology and Embryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of Pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Department of Biomaterials and tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic Research Center for Structural Materials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

Magnesium is an excellent material in terms of biocompatibility and its corrosion products can serve as an active source for new bone ***,localized corrosion and h_(2)generation limit the potential of Mg-based *** low-alloyed Mg-Zn wires can strongly reduce problems with large h_(2)bubbles and improve the mechanical properties considerably while maintaining excellent long-term *** pickling and a polymer coating can be effectively used to lower the rate of in vivo *** this work,microstructural,mechanical,and in vitro characterization of 250μm and 300μm extruded wires made from ultra-pure Mg,commercially pure Mg,Mg-0.15Zn,Mg-0.4Zn and Mg-1Zn was ***,Mg-0.4Zn wires together with a variant coated with a copolymer of L-lactide andε-caprolactone were tested in vivo on artificially damaged Wistar rat *** on the observed Mg-induced osteogenesis,polymer-coated Mg wires with a small addition of Zn are a perspective material for bone-support applications,such as cerclage and fixation wires.

关键词： Magnesium Resorbable Mg wire Mg-Zn implant degradation Biocompatibility study Zn grain boundary segregation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

自主机器人使能技术在制造业中的应用（英文）

引用

transactions of Nanjing University of Aeronautics and Astronautics 2024年第4期 403-431页

作者： ERD?S gábor ABAI Kristóf BEREgI Richárd CSEMPESZ János CSERtEg tamás gODó gábor hAJóS Mátyás háY Borbála hORVáth Dániel hORVáth gergely JUNIKI ádám KEMéNY Zsolt kováCS András NACSA János PANItI Imre PEDONE gianfranco tAKáCS Emma tIPARY Bence ZAhORáN László VáNCZA József 匈牙利研究网络计算机科学与控制研究所布达佩斯经济与技术大学制造科学与技术系 EPIC非盈利创新实验室厄特沃什·罗兰大学

自主制造系统的研究既受益于信息物理融合系统这一新技术的推动，也响应工业实际需求的号召。目前，先进的传感器技术、数字孪生、人工智能和新型通信技术可以支持半结构化工业环境中的自主操作，可实现对生产过程的实时监控、情况识别... 详细信息

自主制造系统的研究既受益于信息物理融合系统这一新技术的推动，也响应工业实际需求的号召。目前，先进的传感器技术、数字孪生、人工智能和新型通信技术可以支持半结构化工业环境中的自主操作，可实现对生产过程的实时监控、情况识别和预测、自动和自适应（重新）规划、团队合作，以及通过学习提高性能。本文总结了实现自主工业机器人技术的主要需求，提出了实现此类系统的通用工作流程，并介绍了hUN-REN SZtAKI最近在装配、焊接、打磨、拾取和放置以及机械加工等多个应用领域的广泛实践。这些解决方案的共同点是以通用的数字孪生概念为核心。最后，本文提出实现工业自主机器人解决方案的一般建议，并讨论了未来要研究的一些开放性问题。

关键词：工业机器人自动化数字孪生使能技术

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Biodegradable zinc-iron alloys: Complex study of corrosion behavior,mechanical properties and hemocompatibility

引用

Progress in Natural Science:Materials International 2021年第2期31卷 279-287页

作者： Z.Orságová Králová R.gorejová R.Orin?aková M.Petra?ková A.Orin?ak M.Kupková M.hrubov?a?ková t.Sop?ák M.Baláz? I.Maska?ová A.kovalc?íková K.kova? Department of Physical Chemistry Faculty of Science Pavol Jozef ?afa?rik University in Ko?ice Institute of Materials Research Slovak Academy of Sciences Institute of geotechnics Slovak Academy of Sciences University of Veterinary Medicine and Pharmacy in Ko?ice Department of Animal Nutrition Dietetics and Animal Breeding

Zn-Fe alloys have been extensively investigated in this study with a view to their application as biodegradable bone implants. Biogenic element zinc is a very appropriate metal because of the ideal degradation rate compared to those of Mg and Fe. Studied alloys were made by compressing metallic powders in a content ratio of 100% Zn,Zn-1% Fe, Zn-2% Fe, Zn-5% Fe and Zn-10% Fe and sintering at 350°C for 1 h. Prepared samples were examined by optical microscopy, SEM and XRD. Corrosion behavior, mechanical testing and hemocompatibility were observed subsequently. the electrochemical performance of such materials was studied in the simulated body fluids. the enhanced corrosion rate was observed for all samples after iron addition due to the micro-galvanic effect between the pure Zn and Zn;Fe intermetallic phase. the corrosion rate of the Zn-5% Fe alloyed sample was more than 20-times higher（2.89 mmpy） compared to the pure Zn. however, alloying with more than 5 wt %of iron diminished the mechanical performance of the material. therefore, the performed mechanical and hemocompatibility tests showed acceptable biocompatibility of zinc and Zn-1% Fe and Zn-2% Fe samples.

关键词： Biodegradable materials Zinc Iron Alloy Corrosion behavior hemocompatibility

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

在批次和固定床反应器中用于菜子油酯化K/Al_2O_3催化剂的稳定性(英文)

引用

催化学报 2014年第7期35卷 1084-1090页

作者： Petr Kutálek Libor apek Lucie Smoláková David Kubikb Martin hájek Department of Physical Chemistry Faculty of Chemical TechnologyUniversity of PardubiceStudentská 573532 10 PardubiceCzech Republic Research Institute of Inorganic Chemistry RENTECH-UniCREChempark Litvínov Záluí-Litvínov436 70Czech Republic

Catalytically active, stable, and mechanically durable solid K/Al 2 O 3 catalysts for the transesterification of rapeseed oil with methanol was studied. In a batch reactor, high catalytic activity was accompanied by leaching of K species, caused by glycerol, and mechanical destruction of the solid catalyst as a result of contact with the stirrer. In a fixed-bed reactor, some leaching of K species into the liquid phases was also observed, but approached 0 during 30 h of time-on-stream; the activity of the K/Al 2 O 3 catalyst (∼83% ester yield) was stable for 100 h of time-on-stream and no mechanical destruction of the catalyst was observed. the populations of K 2 O and K-O-Al species for fresh and used K/Al 2 O 3 catalysts were compared using Fourier transform infrared spectroscopy. It was found that some K 2 O species leached into the liquid phases at the beginning of the reaction.

关键词：固定床反应器固体催化剂 Al2O3 稳定性菜籽油转移反应傅立叶变换红外光谱法酯基

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ON CLASSES OF REgULAR gRAPhS WIth CONStANt MEtRIC DIMENSION

引用

Acta Mathematica Scientia 2013年第1期33卷 187-206页

作者： Muhammad IMRAN Syed Ahtsham ul haq BOKhARY Ali AhMAD Andrea SEMANIOV-FENOVíkov Centre for Advanced Mathematics and Physics(CAMP) National University of Sciences and Technology(NUST) Center for Advanced Studies in Pure and Applied Mathematics Bahauddin Zakariya University College of Computer and Information System Jazan University Department of Applied Mathematics and Informatics Technical University

In this paper, we are dealing with the study of the metric dimension of some classes of regular graphs by considering a class of bridgeless cubic graphs called the flower snarks Jn, a class of cubic convex polytopes considering the open problem raised in [M. Imran et al., families of plane graphs with constant metric dimension, Utilitas Math., in press] and finally harary graphs h5,n by partially answering to an open problem proposed in Ⅱ. Javaid et al., Families of regular graphs with constant metric dimension, Utilitas Math., 2012, 88： 43-57]. We prove that these classes of regular graphs have constant metric dimension.

关键词： metric dimension basis resolving set cubic graph flower snark convexpolytope

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of herpesvirus infection on pancreatic duct cell secretion

引用

World Journal of gastroenterology 2005年第38期11卷 5997-6002页

作者： Péter hegyi Balázs rdg Zoltán Rakonczai Jr tamás takács János Lonovics Annamária Szabolcs Réka Sári András tóth Julius g Papp András Varró Mária K kovács Mike A gray Barry E Argent Zsolt Boldogki First Department of Medicine Department of Biology Division of Cardiovascular Pharmacology School of Cell and Molecular Biosciences

AIM： to examine the effect of acute infection caused by herpesvirus （pseudorabies virus, PRV） on pancreatic ductal secretion. MEthODS： the virulent Ba-Dupgreen （BDg） and non- virulent Ka-RREp01acgfp （KEg） genetically modified strains of PRV were used in this study and both of them contain the gene for green fluorescent protein （gFP）. Small intra/ interlobular ducts were infected with BDg virus （10^7 PFU/mL for 6 h） or with KEg virus （10^10 PFU/mL for 6 h）, while non-infected ducts were incubated only with the culture media. the ducts were then cultured for a further 18 h. the rate of hCO3 secretion [base efflux -λ（B）] was determined from the buffering capacity of the cells and the initial rate of intracellular acidification （1） after sudden blockage of basolateral base loaders with dihydro-4,4,- diisothiocyanatostilbene-2,2,-disulfonic acid （500 μmol/L） and amiloride （200 μmol/L）, and （2） after alkali loading the ducts by exposure to Nh4Cl. All the experiments were performed in hCO3-buffered Ringer solution at 37 ℃ （n = 5 ducts for each experimental condition）. Viral structural proteins were visualized by immunohistochemistry. Virallyencoded gFP and immunofluorescence signals were recorded by a confocal laser scanning microscope.RESULtS： the BDg virus infected the majority of accessible cells of the duct as judged by the appearance of gFP and viral anUgens in the ductal cells. KEg virus caused a similarly high efficiency of infection. After blockage of basolateral base loaders, BDg infection significantly elevated -λB-） 24 h after the infection, compared to the non-infected group. however, KEg infection did not modify -λB-）. After alkali loading the ducts, -λB-） was significantly elevated in the BDg group compared to the control group 24 h after the infection. As we found with the inhibitor stop method, no change was observed in the group KEg compared to the non-infected group. CONCLUSION： Incubation with the BDg or KEg strains of PRV results in an effective i

关键词： Pancreas hypersecretion Ductal cells Infection Pseudorabies virus

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Weyl group Orbit Functions in Image Processing

引用

Applied Mathematics 2014年第3期5卷 501-511页

作者： goce Chadzitaskos Lenka háková Ondrej Kajínek Faculty of Nuclear Sciences and Physical Engineering Czech Technical University in PraguePragueCzech Republic

We deal with the Fourier-like analysis of functions on discrete grids in two-dimensional simplexes using C- and E-Weyl group orbit functions. For these cases, we present the convolution theorem. We provide an example of application of image processing using the C-functions and the convolutions for spatial filtering of the treated image.

关键词： Orbit Functions Convolution Image Processing

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stability case study of the ACROBOtER underactuated service robot

引用

theoretical & Applied Mechanics Letters 2012年第4期2卷 27-33页

作者： László L.kovács László Bencsik hAS-BME Research group on Dynamics of Machines and Vehicles Budapest H-1521Hungary Department of Applied Mechanics Budapest University of Technology and EconomicsBudapest H-1521Hungary

the dynamics of classical robotic systems are usually described by ordinary differential equations via selecting a minimum set of independent generalized coordinates. however, different parameterizations and the use of a nonminimum set of （dependent） generalized coordinates can be advantageous in such cases when the modeled device contains closed kinematic loops and/or it has a complex structure. On one hand, the use of dependent coordinates, like natural coordinates, leads to a different mathematical representation where the equations of motion are given in the form of differential algebraic equations. On the other hand, the control design of underactuated robots usually relies on partial feedback linearization based techniques which are exclusively developed for systems modeled by independent coordinates. In this paper we propose a different control algorithm formulated by using dependent coordinates. the applied computed torque controller is realized via introducing actuator constraints that complement the kinematic constraints which are used to describe the dynamics of the investigated service robotic system in relatively simple and compact form. the proposed controller is applied to the computed torque control of the planar model of the ACROBOtER service robot. the stability analysis of the digitally controlled underactuated service robot is provided as a real parameter case study for selecting the optimal control gains.

关键词： stability underactuation natural coordinates control constraints

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：