12 research outputs found

    虚拟砂轮磨削有限元仿真以及试验对比分析

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    磨削加工是众多磨粒参与共同作用的结果。基于金刚石砂轮表面形貌和磨粒分布情况,利用虚拟仿真技术建立虚拟砂轮模型。实现对磨削机理更加深入的研究是很有必要的。通过仿真磨削与试验给出了对比分析,提出了机床工艺交互作用下磨削机理研究的意义。2016年工信部智能制造综合标准化与新模式应用项目(2016-213

    Study on Vibration Characteristics of Wheeled Tractor Power Output Assembly

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    通过对大功率轮式拖拉机动力输出总成系统的激励分析、振动模态分析以及对系统固有特性的研究,分析了轴不平行度几何因素对总成系统的振动影响,研究了轴承游隙、轴承预紧力等物理因素对总成系统的固有特性影响。通过将轴承游隙、轴承预紧力控制在一个合理范围内,降低了系统的固有频率,减小了动力输出总成系统的振动。Based on the excitation analysis and vibration modal analysis of a large power wheeled tractor power output assembly system and study of the system intrinsic characteristics,the influence of shaft nonparallelism on assembly system vibration is analyzed. In addition,the influence of physical factors such as bearing clearance and bearing preload on inherent characteristics of the assembly system is studied. By controlling the bearing clearance and bearing preload within a reasonable range,the natural frequency of the system is reduced,and the vibration of the assembly system is also reduced.工信部智能制造专项“新型轮式拖拉机智能制造新模式应用”(豫洛工业制造[2016]07744

    Elevator Group Control Algorithm Research and Control Program Implementation Based on Fuzzy Neural Network with Four-layer Structure

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    为提高电梯群控系统的载客效率,减少系统运行能耗,提高运行稳定性,在传统模糊神经网络算法的原理上,设计了基于电梯群控模糊规则的四层模糊神经网络算法,确定四层模糊神经网络结构,定义模糊规则,测算隶属数值,推导隶属度函数,并且基于Matlab提出算法检验方案,给出验证结果。最后采用结构化编程思路在PLC中实现控制程序,并提出可变响应闭环的程序实现方式。In order to improve passenger carrying efficiency of the elevator group control system, reduce system energy consumption and improve the stability of the operation, a four-layer neural network algorithm based on the algorithm principle of tradi- tional fuzzy neural network is designed. The implementation includes determining four fuzzy neural network structure, defining the fuzzy rules, calculating the membership value, deriving the membership function and presenting the results through Matlab program. Finally, elevator control program is designed through the structured programming method in PLC and a variable response of the closed-loop programming method is proposed.青年科学基金项目“发展适用于肿瘤细胞实时决速拉曼成像的光谱信号处理方法”(编号:21503171)资助

    Zooplanktonic diversity in the western Pacific

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    西太平洋区是全球海洋生物种源中心,许多类群的最高物种多样性都出现于该区域,因此,在该区开展种类多样性的研究不仅重要和必要,而且具有在跨国尺度上进行综合管理和相互合作的迫切性。本文在西太平洋的浮游动物样品鉴定分类、编目、文献资料整理和分析的基础上,记录和编入西太平洋10个浮游动物类群2,658种(含亚种),隶属于206科675属,其中水螅水母类99科251属697种,栉水母类12科22属59种,浮游软体动物14科35属86种,介形类8科89属416种,桡足类51科156属908种,糠虾类4科58属202种,磷虾类2科8属56种,十足类8科22属105种,毛颚类5科8属48种,被囊类5科26属81种。The western Pacific region has been operating as a centre for the origin of marine biodiversity: the richest diversity of many marine taxa was found in these waters.Therefore,biodiversity research and con-servation efforts in this area are necessary in order to promote the integrative and international management of this resource.The present work is a compilation of numbers of all the families,genera and species of ma-jor taxa of zooplankton known in the western Pacific Ocean(106°–150°E,0°–44°N).In all,2,658 zooplank-tonic species(including subspecies) belonging to 206 families and 675 genera have been recorded from taxonomic identifications and literature,99 families,251 genera and 697 species belong to the Medusozoa,12 families,22 genera and 59 species to the Ctenophora,14 families,35 genera and 86 species to the pelagic Molluscs(Pteropoda and Heteropoda),8 families,89 genera and 416 species to the Ostracoda,51 families,156 genera and 908 species to the Copepoda,4 families,58 genera and 202 species to the Mysidcea,2 fami-lies,8 genera and 56 species to the Euphausiacea,8 families,22 genera and 105 species to the Decapoda,5 families,8 genera and 48 species to the Chaetognatha,5 families,26 genera and 81 species to the Tunicata.908专项“中国海洋生物种类名录和图谱”(908-ZC-II-02)和908专项海洋生物样品库;科技部基础工作专项“我国和邻近西北太平洋海洋生物物种编目和分布图集编制”(2006FY220700

    心中有道,笑对人生

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    厦门大学图书馆“人文社科实验室” “文化讲堂”(176) 标题:心中有道,笑对人生 主讲人:黄景山 黄景山(1950—),台湾高雄市人,年少热爱音乐,年青时任职台湾中国电视公司中视大乐队,担任主奏吉他手。1989年2月22日首次回到祖国大陆旅游,即决定在厦门市投资创业,7天内签约开发厦门台湾民俗村(景州乐园)。 秉持“山水有情 · 人间有爱”的企业精神及“弘扬中华民族优秀文化 · 促进海峡两岸密切交流”的企业文化,厦门台湾民俗村曾举办过许多次海峡两岸文化交流活动,普获社会各界的好评。 黄景山热衷于社会公益事业,受邀担任“厦门市中华传统文化研究会名誉会长”、“厦门市闽南文化研究会名誉会长”、“厦门市佛教文化学会名誉会长”等职,于1999年9月19日获得“厦门市荣誉市民”称号。 2003—2006年期间,由于事业开发规模不断扩大,建设资金出现短缺,公司陷入严重困境。承蒙大陆各级政府、社会各界及员工们的谅解与支持,得以度过难关。对此,黄景山一直颇为愧疚、自责,并深表感激。 黄景山长年以来,皆以“心中有道 · 笑对人生”的心念、心态,面对一切顺逆境因缘的淬炼与考验。他深信只要真心把“道”应化于自身,以欢喜心悦纳接受千关考、万缘炼,藉事炼心,藉缘转境,从中发现、修补自己的不足,必能体悟“在顺境中能顺非菩提,在逆境中能顺真莲花”的人生境界。 现代愚公黄景山的故事(可参见网络视频)。 内容: 自1989年初从台湾来厦创建台湾民俗村及欢天喜地道场心路历程。修德行道心得分享,以道来思想交流。 时间:2013年5月11日(周六),下午3点 地点:厦门大学图书馆323 区域研究资料中

    CF/Epoxy擬似等方性積層板の損傷進展に及ぼす温度と湿度の影響

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    The influence of temperature and moisture on the microscopic damage evolution in quasi-isotropic carbon/ epoxy laminates is investigated. Tensile tests of three types of specimens are carried out under hygrothermal conditions. Some specimens are unloaded at various stresses to obverve the damage state microscopically and measure the transverse crack density and delamination area. Stress distributions under tensile loading are calculated in terms of the lamination theory and three-dimensional finite element method taking into account the hygrothermal residual stresses. The damage process under each hygrothermal condition can be explained by considering the residual stresses and critical stresses for damage generation.1. 緒言 / 2. 応力解析 /  2.1 積層理論による残留応力 /  2.2 有限要素解析 / 3. 実験 / 4. 結果と考察 /  4.1 損傷進展挙動 /   4.1.1 [0°/±45°/90°]_s試験片 /   4.1.2 [-45°/0°/90°/45°]_s試験片 /   4.1.3 [45°/90°/0°/-45°]_s試験片 /  4.2 残留応力と損傷 /  4.3 強度と残留応力 / 5. 結

    Literaturverzeichnis und Anhang

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    JUNO Sensitivity on Proton Decay pνˉK+p\to \bar\nu K^+ Searches

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    The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in pνˉK+p\to \bar\nu K^+ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via pνˉK+p\to \bar\nu K^+ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is 9.6×10339.6 \times 10^{33} years, competitive with the current best limits on the proton lifetime in this channel
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