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Bridging large gaps in the injured spinal cord: mechanical and biochemical tissue adaptation

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Neural Regeneration Research 2016年第10期11卷 1572-1574页

作者： Veronica Estrada Hans Werner müller molecular Neurobiology Laboratory Department of Neurology Heinrich-Heine-University Medical Center Düsseldorf

Incidence and consequences of spinal cord injuries： World- wide, every year 250,000-500,000 people suffer from spinal cord injury （SCI; ***, 2013）. Traumatic lesions of the spinal cord lead to primary and secondary injury mechanisms, which result in axon damage, loss of signal conduction, demyelination of axons and long-lasting deficits in motor and sensory func- tion. The extent of the damage and the subsequent functional loss depend on the spinal level and the severity of the primary injury. Furthermore, pathophysiological and pathomorpholog- ical responses in acute and chronic SCI share similar but also different requirements for treatment.

关键词： Bridging large gaps in the injured spinal cord SCI

Numerical and experimental investigations of weld pool geometry in GTA welding of pure aluminum

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Journal of Central South University 2014年第1期21卷 20-26页

作者： A.H.Faraji A.Bahmani m.Goodarzi S.H.Seyedein m.O.Shabani Young Researchers Club Varamin-Pishva BranchIslamic Azad University materilal Science and Engineering Department Sharif University of Technology Department of metallurgy and materials Engineering Iran University of Science and Technology materials and Energy Research Center (mERC)

A 2-D numerical model was developed to predict the shape of weld pool in stationary GTA welding of commercial pure aluminium, without considering fluid flow in the weld pool. A Gaussian current density and heat input distribution on the surface of the workpiece were considered. The parameters of Gaussian distribution were modified by comparing calculated results with experimental ones. It was found that these distribution parameters are fimctions of applied current and arc length. Effects of arc length, applied current and welding time on the geometry of the weld pool were investigated. To check the validity of the model, a series of experiments were also conducted. In general, the agreement between calculated overall shape of the weld pool and the experimental one was acceptable, especially in low applied currents. Therefore, it can be concluded that in pure aluminium, the heat conduction is dominant mechanism of heat transfer in the weld pool.

关键词： numerical model GTA welding pure aluminium weld pool

自主机器人使能技术在制造业中的应用（英文）

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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

Inhibition of Ehrlich ascites carcinoma by manilkara zapota *** bark in Swiss albino mice

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Asian Pacific Journal of Tropical Biomedicine 2011年第6期1卷 448-451页

作者： m Abu Osman m mamunur Rasbid m Abdul Aziz m Rowshahul Habib m Rezaul karim Department of Biochemistry and molecular Biology Faculty of ScienceRajshahi University

Objective:To evaluate the antitumor activity of manilkara zapota(***) *** bark against Ehrlich ascites carcinoma(EAC) in Swiss albino ***:The in vivo antitumour activity of the ethyl acetate extract of stem bark of *** L.(EASm) was evaluated at 50,100 and 200 mg/kg bw against EAC using mean survival *** administration of the extract of ***,viable EAC cell count and body weight in the EAC tumour hosts were *** animal was also observed for improvement in the haematological parameters(e.g.,heamoglobin content,red and white blood cells count and differential cell count) after EASm treatment. Results:Intraperitoneal administration of EASm reduced viable EAC cells,increased the survival lime,and restored altered haematological *** efficacy was observed for EASm at 100 mg/kg dose(Pm bark of *** *** significant antitumour activity.

关键词： manilkara zapota Antitumour activity Stem bark Ehrlich ascites carcinoma Haematological parameter

Numerical investigations of arc behaviour in gas metal arc welding using ANSYS CFX

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Frontiers of materials Science 2011年第2期5卷 98-108页

作者： m. SCHNICK U. FUESSEL m. HERTEL A. SPILLE-KOHOFF A. B. mURPHY Institute of Surface and manufacturing Technology Technische Universitat Dresden Dresden Germany CFX Berlin Software GmBH Berlin Germany CSIRO materials Science and Engineering Lindfield NSW 2070 Australia

Current numerical models of gas metal arc welding（GmAW）are trying to combine magnetohydrodynamics （mRD） models of the arc and voiume of fluid （VoF） models of metal transfer They neglect vaporization and assume an argon atmosphere for the arc region, as it is common practice for models of gas tungsten arc welding, These models predict temperatures above 20 000K anda temperature distribution similar to tungsten inert gas （TIG） arcs： However. current spectroscopic temperature measuretemperatures. In contrast to TIG arcs temperature distrbution. The paper vapour and which is in a yery good res, Futhermore; the model is abile to predict the local central minimum in the radial temperature and the radial electric current density distributions for the first time. The axially symmetric model of the welding torch, the work piece, the wire and the arc （fluid domain） implements mHD as well as turbulent mixing and thermal demixing of metal vapour in argon. The mass fraction of iron vapour obtained from the simulation shows an accumulation in the arc core and another accumulation on the fringes of the arc at 2000 to 5000 K. The demixing effects lead to very low concentrations of iron between these two regions. Sensitive analyses demonstrate the influence of the transport and radiation properties of metal vapour, and the evaporation rate relative to the wire feed. Finally the model predictions are compared with the measuring results of Zielihska et al.

关键词： arc welding numericai simulation GmAW, ANSYS CFX

HIGHLY ACTIVE CATALYSTS FOR CYCLOPROPANATION OF TETRAmETHYLETHYLENE

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Chinese Chemical Letters 1996年第8期7卷 739-740页

作者： Zheng, Z Han, m Chen, HL CHINESE ACAD SCI DALIAN INST CHEM PHYSDALIAN 116023PEOPLES R CHINA

Copper(II) Schiff base complexes derived from aromatic amine and salicylaldehyde were found to be highly active catalysts for the cyclopropanation of tetramethylethylene with ethyl diazoacetate. 82% yield of cycloprop...

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Global and Hemispherical Interannual Variation of Total Column Ozone from TOmS and OmI Data

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Atmospheric and Climate Sciences 2017年第3期7卷 247-255页

作者： José Luis Pinedo-Vega mario molina-Almaraz Carlos Ríos-martínez Fernando mireles-garcía J. Ignacio Dávila-Rangel Universidad Autónoma de Zacatecas (UAEN) Ciprés 10 Fracc. La Pe&#241uela Zacatecas México

Daily Total Column Ozone (TCO) measurements compiled from Total Ozone mapping Spectrometer (TOmS) and Ozone monitoring Instruments (OmI) were used to analyze the global and hemispherical TCO interannual variations. Two periods of TCO measurements were analyzed separately covering full years. For the 1978-1994 period, the TCO showed a global decade decrease rate of 13.45 DU (about -4.3%). For the Northern Hemisphere(NH) the decade decrease rate was of 12.96 DU (-4.0%), while in the Southern Hemisphere (SH) was of 13.57 DU (-4.5%). These decreases in ozone trends, using the totality of TOmS and OmI satellite measurements, are greater than those reported in literature. The 1998-2014 period global TCO decade decrease rate was of 1.56 DU, corresponding 0.94 DU and 0.138 DU for the NH and SH, respectively. The global TCO variations must show a double annual periodicity, the first one with maxima in march due to the Northern Hemisphere (NH) and the second one during September due to the Southern Hemisphere (SH). However, the maxima due to SH TCO interannual variations have gradually vanished. A disturbance in the SH TCO interannual variations has appeared since 1980;graphically the periodicity brakes down and transforms to a double peak from 1985 and on. This effect can be attributed to the hemispheric impact of the ozone hole at the South Pole. Between October 1, 2004 and December 14, 2005 TOmS and OmI have recorded this disturbance unequivocally. We conclude that the disturbance in SH TCO has an irreversible character.

关键词： Global and Hemispherical Ozone Trends Total Column Ozone Interannual Variation TOmS Data OmI Data

DEFPOS and Its First Results

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Chinese Journal of Astronomy and Astrophysics 2005年第2期5卷 211-220页

作者： m.■ahan .Ye■ingil N.Aksaker .Kιzιo■lu m.Akyιlmaz Department of Physics Cukurova University 01330AdanaTurkeyDepartment of Physics Cukurova University01330AdanaTurkey Department of Physics Cukurova University01330AdanaTurkeyDepartment of Physics Middle East Technical UniversityAnkaraTurkeyDepartment of Physics Cukurova University01330AdanaTurkey

A spectrometer was built to examine the interstellar medium (ISm) using the hydrogen Balmer α line. It is called Dual Etalon Fabry-Perot Optical Spectrometer (DEFPOS). DEFPOS will be coupled to coudé exit of the 150 cm telescope (RTT150) installed at TüBITAK National Observatory (TUG). DEFPOS was ready for observations about two years ago, but work was still continuing on the RTT150 coudé exit alignment. So we have started observing HII regions with DEFPOS without the RTT150. We present here some characteristics of the instrument and some of the results obtained.

关键词： ISm: general ISm: HII regions instrumentation: Interferometers techniques:interferometric atmospheric effect

Nonlinear Dust Acoustic Waves in Dissipative Space Dusty Plasmas with Superthermal Electrons and Nonextensive Ions

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Communications in Theoretical Physics 2016年第5期65卷 606-612页

作者： A.m.El-Hanbaly E.K.El-Shewy m.Sallah H.F.Darweesh Theoretical Physics Research Group Physics Department Faculty of Science Mansoura University Department of Physics Taibah University

The nonlinear characteristics of the dust acoustic(DA)waves are studied in a homogeneous,collisionless,unmagnetized,and dissipative dusty plasma composed of negatively charged dusty grains,superthermal electrons,and nonextensive *** pseudopotential technique has been employed to study the large amplitude DA ***(Sagdeev pseudopotential)has an evidence for the existence of compressive and rarefractive *** global features of the phase portrait are investigated to understand the possible types of solutions of the Sagdeev *** the other hand,the reductive perturbation technique has been used to study small amplitude DA waves and yields the Korteweg-de Vries-Burgers(Kd V-Burgers)equation that exhibits both soliton and shock *** behavior of the obtained results of both large and small amplitude is investigated graphically in terms of the plasma parameters like dust kinematic viscosity,superthermal and nonextensive parameters.

关键词： Sagdeev pseudopotential KdV-Burgers equation soliton and shock waves reductive perturbation dust kinematic viscosity