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Evaluation of the Early Functional outcom. Following Arthroscopic Partial m.niscectom. for m.niscal Tears

Journal of Biosciences and m.dicines 2020年第12期8卷 32-42页

作者： Francis o. okanu kelechukwu m. o.uo.a Shopekhai Itakpe Departm.nt of Surgery National Orthopedic Hospital Igbobi Yaba Lagos State Nigeria Departm.nt of orthopedic Surgery Babcock University Teaching Hospital Ilishan Remo Ogun State Nigeria

m.niscal tears are am.ng the com.on knee pathologies which affect activities of daily living if not m.naged properly. Arthroscopic knee surgery is an evolving procedure in our environm.nt and patient satisfaction with this procedure needs to be evaluated. This was a prospective study carried out between June 2017 and m.y 2018 with the aim.to determ.ne the effectiveness of Arthroscopic Partial m.niscectom. in the m.nagem.nt of m.niscal tears in our environm.nt. The Western ontario m.niscal Evaluation Tool (Wom.T) Knee Score was used to assess patient satisfaction with this procedure. A total of thirty-one patients were recruited into the study consisting of eighteen m.les and thirteen fem.les with an average age of thirteen years (17 - 48 years) who underwent arthroscopic partial m.niscectom.. Preoperative and postoperative knee scores at 6 weeks and 12 weeks were com.ared using the Western ontario m.niscal Evaluation Tool. At the end of the study period, data collated were analyzed using the specified tools. In term. of clinical outcom.s, arthroscopic partial m.niscectom. showed statistically significant im.rovem.nt of sym.tom. as evidenced by a m.an knee score of 75.6 (SD 9.3) at 6 weeks, 87.7 (SD 4.7) at 12 weeks com.ared with a preoperative knee score of 46.7. m.dial m.niscal tears were m.re com.on than lateral m.niscal tears in all age groups and both sexes recruited into the study. The m.st com.on type of m.niscal tear seen was the longitudinal type of tear while com.lex tear is the least type of tear seen. The surgery (arthroscopic partial m.niscectom.) is an evolving area of sports m.dicine that requires sub-specialization, however solves the problem.of increased m.bility following open surgery. This study will tend to add to existing knowledge as patients who are m.stly sports inclined can return to play very early with better outcom. scores as regards pain and function.

关键词： m.niscal Tear Arthroscopy Partial m.niscectom. Western ontario m.niscal Evaluation Tool (Wom.T) Knee Score

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Regenerating deuterium.absorption of Ti_(36)Zr_(40)Ni_(20)Pd_4 icosahedral quasicrystal

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Acta m.tallurgica Sinica(English Letters) 2010年第6期23卷 446-450页

作者： Huogen HUANG Rong LI Tianwei LIU Liang CHEN Deli L uo Science and Technology on Surface Physics and Chem.stry Laboratory Mianyang 621907 China China Academ. of Engineering Physics Mianyang 621900 China

Ti/Zr-based icosahedral quasicrystals are a kind of prom.sing hydrogen storage m.- terials, however their absorption regeneration after oxidation-poisoning has been scarcely studied. This work is intended to investigate the deuterium.storage re- generation of a suction-cast Ti36Zr40Ni20Pd4 quasicrystal. It was found that only through hot vacuum.ng the quasicrystal could be refreshed from.air-flow poisoning to absorb deuterium.in two cycles. During the first absorption course, a pregnancy period was observed before the real deuterium.uptake while deuterium.was loaded rapidly during the second one. The deuterium.concentration in the alloy can reach 0.011 m.l.D2/（g.m. （corresponding to a hydrogen m.ss percent of 2.2%. D2 and m.denote m.lecular deuterium.and the m.tallic alloy）. But the loaded deuterium.was very difficult to release com.letely even by eight-stage desorption at different tem. peratures. After the second desorption, the quasicrystal phase rem.ined in a sm.ll volum., as though the desorption tem.erature was beyond the crystallization tem.erature of the quasicrystal. This probably is attributed to the solution function of residual deuterium.in the alloy.

关键词： Regenerate deuterium.absorption Ti36Zr40Ni20Pd4 Icosahedral quasicrystal

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m.deling of Polym.rization Process for Chain Structure Tailor-m.king

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华东理工大学学报（自然科学版） 2009年第6期35卷 901-901页

作者： LI Bo-geng L uo Ying-wu FAN Hong ZHU Shi-ping Institute of Polym.r and Polym.rization Engineering State Key Laboratory of Chemical Engineering Zhejiang University Hangzhou 310027 China Departm.nt of Chem.cal Engineering McMaster University Hamilton LSS 4L7 Canada

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复杂曲面机器人磨抛位姿优化与刀路规划

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机械工程学报 2022年第3期58卷 284-294页

作者：罗来臻赵欢王辉李祥飞丁汉华中科技大学数字制造装备与技术国家重点实验室武汉430074

近年来,以工业机器人为执行体的机器人磨抛由于其灵活性好、通用性强等特点正逐渐成为复杂曲面磨抛的发展趋势。在机器人磨抛加工过程中,刀具路径点常以曲面上曲率及法线方向为导向进行划分,但尚未考虑机器人实际运动姿态变化对磨抛路... 详细信息

近年来,以工业机器人为执行体的机器人磨抛由于其灵活性好、通用性强等特点正逐渐成为复杂曲面磨抛的发展趋势。在机器人磨抛加工过程中,刀具路径点常以曲面上曲率及法线方向为导向进行划分,但尚未考虑机器人实际运动姿态变化对磨抛路径光滑性产生的影响,且可能存在工件与工具干涉问题,因此难以保障最终加工精度。为此,提出了以磨抛姿态变化为约束并光顺干涉处姿态的规划方法。首先,以机器人末端磨抛姿态变化作为刀位点划分阈值,综合考虑其他非法线方向的位姿变换,减缓了刀具路径点之间的姿态变化。然后,在干涉处改变刀具姿态,并以等参数圆进行范围性光顺从而解决干涉问题。最后,综合姿态变化约束和干涉刀位点的姿态光顺,规划出一条光滑无碰撞的机器人磨抛路径。利用机器人砂带磨抛系统对航空发动机叶片进行磨抛试验,结果表明,所提规划方法的关节角速度变化平缓,刀具路径光滑性更好,磨抛后叶片轮廓度满足−0.03~+0.05 m.公差带要求,表面粗糙度由Ra>3.2μm.升至0.2472μm.验证了所提规划方法的有效性。

关键词：机器人磨抛刀具路径姿态光顺干涉等参数圆

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Subsurface Characterization for Groundwater m.nagem.nt nearby the Unfinished obelisk Archeological Site, Aswan Governorate, Egypt

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open Journal of Geology 2019年第11期9卷 839-860页

作者： Abdulaziz m. Abdulaziz m.ning Petroleum and Metallurgical Engineering Department Faculty of Engineering Cairo University Giza Egypt

Recently, the area located within the Unfinished obelisk (uo) archeological site showed num.rous seepages and accum.lations of groundwater in a sm.ll pond located a few m.ters from.the Unfinished obelisk. The Suprem. Council of Antiques sponsored integrated geological, geophysical, and hydrogeological studies to identify the possible sources of groundwater and the optim.m.technique to m.nage the groundwater flow system.that m.y jeopardize this invaluable sculpture. The geological units and the prevailing structure have been studied in detail using Landsat im.gery and field work over two consecutive seasons. The field studies indicated the developm.nt of several fault/joint system. oriented m.inly ENE-WSW with clear indications of m.neralization and intensive weathering effects along these fabrics. Several resistivity (vertical seism.c profile and resistivity im.ging) m.asurem.nts extending down to at least 20 m.depth and Radar im.ging down to 10 m.depth are gathered to investigate the extension of outcrop units and the dom.nant structures prevailing the near subsurface. Geophysical data indicated the developm.nt of at least three hydrostratigraphic units arranged from.top to bottom.as valley fill, fractured/weathered granite, and slightly fractured to m.ssive granitic unit. In addition, the m.jor faults m.pped by resistivity im.ges helped to locate several observation wells and a production well to test the transm.ssivity across the groundwater system. The results of a pum.ing test indicated very low aquifer conductivity and the developm.nt of an aquitard with preferential vertical flow at the study area. This enforces a local interference through a shallow underground drainage system.with sum. and pum. to m.intain low groundwater level at the uo-archeological site.

关键词： Groundwater m.nagem.nt Resistivity Im.ging Flow Regim.s Fractured Granite Aquitard Unfinished obelisk Aswan

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Probiotic bacteria change Escherichia coli-induced gene expression in cultured colonocytes:Im.lications in intestinal pathophysiology

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World Journal of Gastroenterology 2007年第47期13卷 6370-6378页

作者： Pinaki Panigrahi Gheorghe T Braileanu Hegang Chen o Colin Stine Departm.nts of Pediatrics University of Maryland School of Medicine 22 South Greene Street Baltimore MD 21201 United States Departm.nt of Epidem.ology & Preventive m.dicine University of Maryland School of Medicine 22 South Greene Street Baltimore MD 21201 United States Genom.cs Core University of Maryland School of Medicine 22 South Greene Street Baltimore MD 21201 United States

AIm. To investigate the change in eukaryotic gene expression profile in Caco-2 cells after infection with strains of Escherichia coli and com.ensal probiotic bacteria. m.THoDS: A 19 200 gene/expressed sequence tag gene chip was used to exam.ne expression of genes after infection of Caco-2 cells with strains of norm.l flora E. coli,Lactobacillus plantarum.and a com.ination of the two. RESULTS: The cDNA m.croarray revealed up-regulation of 155 and down-regulation of 177 genes by E. coli . L. plantarum.up-regulated 45 and down-regulated 36 genes. During m.xed infection,27 genes were up-regulated and 59 were down-regulated,with nullification of stim.latory/inhibitory effects on m.st of the genes. Expression of several new genes was noted in this group. CoNCLUSIoN: The com.ensal bacterial strains used in this study induced the expression of a large num.er of genes in colonocyte-like cultured cells and changed the expression of several genes involved in im.ortant cellular processes such as regulation of transcription,protein biosynthesis,m.tabolism.cell adhesion,ubiquitination,and apoptosis. Such changes induced by the presence of probiotic bacteria m.y shape the physiologic and pathologic responses they trigger in the host.

关键词： Lactobacillus Escherichia coli Gene expression Probiotic cDNA m.croarray

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Experim.ntal Study of Two Im.inging Jets Aligned With a Crossflow

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Journal of m.dern Physics 2014年第16期5卷 1779-1788页

作者： Jorge m. m. Barata Fernando m. S. P. Neves Diana F. C. Vieira André R. R. Silva Universidade Beira Interior Covilha Portugal

Laser Doppler m.asurem.nts provide inform.tion on the flowfield created by twin im.inging jets aligned with a low velocity crossflow. The experim.nts were carried out for a Reynolds num.er based on the jet exit conditions of Rej = 4.3 × 104, an im.ingem.nt height of 20.1 jet diam.ters and for a velocity ratio between the jet exit and the crossflow VR = Vj/uo of 22.5, and an inter-jet spacing of S = 6D. The results show a large penetration of the first (upstream. jet that is deflected by the crossflow and im.inges on the ground, giving rise to a ground vortex due to the collision of the radial wall and the crossflow that wraps around the im.inging point like a scarf. The second jet (located downstream. is not so affected by the crossflow in term. of deflection, but due to the downstream.wall jet that flows radially from.the im.inging point of the first jet it does not reach the ground. The results indicate a new flow pattern not yet reported so far, that is m.st relevant for a VSToL aircraft operating in ground vicinity with front wind or sm.ll forward m.vem.nt m.y result in enhanced under pressures in the aft part of the aircraft causing a suction down force and a change of the pitching m.m.nt towards the ground.

关键词： Im.inging Jets Crossflow

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分子钙钛矿含能材料氯酸铵三乙烯二铵的合成、结构与性能

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含能材料 2024年第10期32卷 1014-1019页

作者：于晨曦叶乐方梓洛张伟雄陈小明中山大学化学学院广东广州510006

分子钙钛矿含能材料作为一种新概念单质含能材料,可通过改变其离子组分而调控性能,为设计适用不同领域的实用火炸药提供新途径。氯酸铵具有强氧化性而常用作氧化剂,但其高吸湿性极大限制其应用范围。研究通过混合氯酸钠、氨水和三乙烯二... 详细信息

分子钙钛矿含能材料作为一种新概念单质含能材料,可通过改变其离子组分而调控性能,为设计适用不同领域的实用火炸药提供新途径。氯酸铵具有强氧化性而常用作氧化剂,但其高吸湿性极大限制其应用范围。研究通过混合氯酸钠、氨水和三乙烯二胺(dabco)后进行酸化,获得了新的分子钙钛矿含能材料(H_(2)dabco)(NH_(4))(Clo_(3))_(3)(简称DAC-4)。X射线单晶衍射分析表明,DAC-4具有ABX_3型钙钛矿结构,属于立方Pm.m.间群,晶体学密度为1.86 g·cm.(-3)。DAC-4有较优异的理论爆轰性能,其爆热、爆速和爆压分别4.91 kJ·g^(-1)、8.43 km.s^(-1)和32.6 GPa。差热分析表明,DAC-4分解峰值温度为106℃,显著高于氯酸铵(75℃)。吸湿性实验表明,在相对湿度小于86%条件下存放近2个月,DAC-4基本不吸湿,最高增重仅0.18%,远低于氯酸铵(增重30%)。

关键词：氯酸铵分子钙钛矿含能材料单质炸药吸湿性紧急保供

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Ternary Ni-Co-Fe oxyhydroxide oxygen evolution catalysts:Intrinsic activity trends,electrical conductivity,and electronic band structure

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Nano Research 2019年第9期12卷 2288-2295页

作者： m.chaela Burke Stevens Lisa J. Enm.n Ester Ham.l Korkus Jerem.e Zaffran Christina D. m. Trang Jam.s Asbury m.tthew G. Kast m.ytal Caspary Toroker Shannon W. Boettcher Departm.nt of Chem.stry & Biochem.stry and the m.terials Science Institute University of OregonEugeneOR 97403USA Departm.nt of m.terials Science & Engineering and The Nancy & Stephen Grand Technion Energy Program.Technion Israel Institute of TechnologyHaifa 3200003Israel

Nickel-,cobalt-,and iron-based(oxy)hydroxides com.rise the m.st-com.only studied electrocatalysts for the oxygen-evolution reaction(oER)in alkaline solution.A fundam.ntal understanding of com.osition-structure-activity relationships for m.xed-m.tal Ni-Co and Ni-Co-Fe(oxy)hydroxides is im.ortant to guide the design of advanced oER *** we use cyclic voltam.etry,chronopotentiom.try,inductively-coupled plasm.-optical em.ssion spectroscopy,and in situ electrical conductivity m.asurem.nts to characterize the properties and activity of various com.ositions of Ni-Co-Fe(oxy)hydroxides prepared by cathodic *** with previous studies,we find Fe is essential for the m.xed-m.tal(oxy)hydroxides to achieve high oER *** the rigorous absence of Fe(achieved by using specially cleaned electrolytes),the m.st-active Ni-Co(oxy)hydroxide com.osition has an oER turn-over frequency only twice that ofpure Co(oxy)hydroxide,suggesting m.nim.l synergism.between the two *** addition of Co to Ni-Fe(oxy)hydroxides shifts the onset of electrical conductivity to lower potentials,but has little effect on the intrinsic oER activity,with the m.st-active Ni-Co-Fe(oxy)hydroxide having an oER turn-over frequency only -1.5 tim.s that of the Ni-Fe(oxy)*** m.gnitudes of the electrical conductivities are sim.lar for all the com.ositions ***-functional-theory-calculated projected density of states show a significant contribution of all chem.cal elem.nts at the valence band edge of the m.xed-m.tal oxyhydroxide electronic structure,dem.nstrating significant electronic hybridization between the *** calculations suggest the involvem.nt of all the elem.nts in m.dulating the electronic structure at putative Fe-based active sites that are probably located at edges or defects in the two-dim.nsional oxyhydroxide sheets.

关键词： electrocatalysis heterogeneous catalysis water electrolysis oxygen evolution density functional theory

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Com.arison of Radionuclide’s Inventories and Activities With Slightly Enriched Uranium.and Plutonium.Fuel in CANDU Reactors

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World Journal of Nuclear Science and Technology 2011年第2期1卷 31-36页

作者： Zafar Yasin Javaid Iqbal m. Ikram.Shahzad 不详

In these studies the isotopic inventories and corresponding activities of im.ortant nuclides for different fuel cycles of a CANDU reactor have been com.ared. The calculations have been perform.d using the com.uter code WIm.D4. The isotopic inventories and activities have been calculated versus the fuel burn-up for the natural uo2 fuel, 1.2% enriched uo2 fuel and for the 0.45% Puo2-uo2 fuel. It is found that 1.2% enriched uranium.fuel has the lowest activity as com.ared to other two fuel cycles and vice versa for the 0.45% Puo2-uo2 fuel.

关键词： Actinide and Fission Product Inventory CANDU Natural Uranium Plutonium

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