89 research outputs found

    Study on King-Long Bus Company’s Marketing Strategy on Partial Markets in Guangdong Province

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    中文摘要 中国客车市场竞争非常激烈,金龙已由原来的市场领先者转变为市场挑战者,客户的需求趋向多元化和多变性的市场环境下,研究金龙客车广东部分区域的市场营销问题具有非常现实的意义。 本文正是以此为研究背景,运用现代市场营销理论以及定性与定量相结合的分析方法,来研究金龙客车广东部分区域的市场营销策略。 首先,在进行大量调查研究的基础上,对客车的市场环境进行了全面的SWOT分析。认为广州2010年举办的亚运会带来广州的客车市场总量的增加将是金龙主要的市场机会,而激烈的市场竞争会是最大的威胁;认为金龙在品牌、产品工艺、做工以及经销商实力方面具备一定的比较优势,而产品价格、车辆的可靠性、稳定性...Abstract The competition of China’s bus market is getting more and more intense. King-Long Bus Company (referred as King-long hereafter) has shifted from the market leader to the market challenger. The need of the customers is tending to be pluralistic and diversified. It is of great realistic meaning to study King-Long’s marketing issues for partial regions in Guangdong Province under such circ...学位:工商管理硕士院系专业:管理学院工商管理教育中心(MBA中心)_工商管理硕士(MBA)学号:X20021538

    Musical Expertise and Melodic Structure in Memory for Musical Notation

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    Two experiments plus a pilot investigated the role of melodic structure on short-term memory for musical notation by musicians and nonmusicians. In the pilot experiment, visually similar melodies that had been rated as either good or bad were presented briefly, followed by a 15-sec retention interval and then recall. Musicians remembered good melodies better than they remembered bad ones: nonmusicians did not distinguish between them. In the second experiment, good, bad, and random melodies were briefly presented, followed by immediate recall. The advantage of musicians over nonmusicians decreased as the melody type progressed from good to bad to random. In the third experiment, musicians and nonmusicians divided the stimulus melodies into groups. For each melody, the consistency of grouping was correlated with memory performance in the first two experiments. Evidence was found for use of musical groupings by musicians and for use of a simple visual strategy by nonmusicians. The nature of these musical groupings and how they may be learned are considered. The relation of this work to other studies of comprehension of symbolic diagrams is also discussed

    Directional attraction of fluid surface wave caused by vertically oscillating prisms

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    实验中发现三棱柱体在流体表面作低频小幅简谐振动时激发的表面波对漂浮物有定向吸引作用,针对此现象进行了系统实验和深入研究,分析了不同结构振源振动引起的流体表面波动的特性。开展了三棱柱体、四棱柱体、六棱柱体和圆柱体作为振源的实验。结果表明正对棱柱体棱边方向的表面波对漂浮物有吸引作用,而正对棱柱体柱面方向的表面波对漂浮物有排斥作用。吸引作用的大小与棱角的尖锐程度呈非线性关系,棱角越尖锐吸引作用越强。当振源为圆柱体即棱角消失时,表面波对漂浮物没有定向吸引作用。实验发现并验证了特定结构振源振动时产生的流体表面波具有定向吸引作用,研究成果可为水面污染物清理、海上溢油收集等工程应用问题提供帮助。</p

    银纳米片的室温合成及其生长机理

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    以硝酸银、氨水和聚乙烯吡咯啉酮(PVP)为原料,在室温条件下采用溶液法合成了银纳米片,根据扫描电子显微镜和高倍透射电子显微镜对样品进行分析的结果,提出银纳米片中大量层错是形成纳米片的关键.国家自然科学基金(批准号:20473069,20673085); 国家重点基础研究发展计划(批准号:2007CB815303); 福建省重大科技专项(批准号:2005HZ01-3)资助项

    Research Progresses in Polyurethane Acrylates

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    本文概述了辐射固化材料聚氨酯丙烯酸酯的研究进展,详细讨论了氨酯丙烯酸酯预聚体的合成、活性稀释剂和固化,及其固化物的结构、性能和应用领域The paper reviews brieFly the research progresses in radiation curable urethane acrylates (UA) materials.The synthesis, reactive dilution agents and curing methods of UA prepolymer, as well as the structure, properties and applications of the cured UA materials are discussed in detail

    A Meibomian Gland Massage Mechanism for Upper and Lower Eyelids Based on Anti-phase Rolling and Enveloping Movement

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    在睑板腺功能障碍的治疗过程中,睑板腺按摩是一种有效的辅助治疗手段。该文针对传统的机械辅助按摩结构中的缺陷进行了改进,提出了一种基于反相按摩辊滚压和包络原理的按摩机构,以提高阻塞物排出顺畅度和提高按摩区域覆盖率,最终达到提高辅助治疗效果的目的。同时,针对机构中电机受尺寸影响较大的情况,对运转过程中输入动力与输出载荷和损耗进行了评估计算,初步验证了所设计机构的可行性。During the course of meibomian gland dysfunction(MGD) treatment, meibomian gland massage is an effective auxiliary method.Based on an extrusion method using anti-phase massage rollers and a theory on envelope plane, a massage mechanism was proposed in this paper for the defect of the traditional mechanical assist massage structure to discharge obstruction of Meibomian gland more smoothly and to enlarge massage coverage.Meanwhile, for the case that the power of motor was significantly limited by size, an evaluation, about the input, output and loss, was carried out to initially verify the feasibility of the designed mechanism

    可控降解抗感染材料的体外释药机制研究

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    在前期合成并表征了可控降解抗感染材料环丙沙星聚氨酯(CFPU)的基础上,建立高效液相色谱法(HPLC)测定其体外降解释放抗菌药物环丙沙星的含量;通过制作累积药物释放曲线,考察不同降解介质及其浓度对药物释放的影响;并对累积药物释放曲线进行拟合,研究其体外可控降解的药物释放机制。结果表明建立的HPLC法简单准确可靠。该材料的降解具有生物响应性,且符合一级动力学;药物释放是以Ritger-Pappas方程(0.45<n<0.89)即扩散与骨架溶蚀相结合的机制进行,在无炎症时以扩散为主,而炎症发生时反之,且炎症越严重,骨架溶蚀越占优势

    液晶复合分离膜及其研究进展

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    液晶复合膜在富氧、异构体分离和离子分离等方面显示其特殊功能.本文概述这种分离膜的制备、结构和功能

    石墨烯在无机材料中的闪光

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    石墨烯作为一种新晋的无机材料,受到了科学界和工业界的广泛关注。本文就石墨烯出现的历程、结构特点、物理性质和载体作用展开简明的介绍,结合石墨烯在化学、生物等领域应用的实例,详细阐述石墨烯在科研与生活中的应用。最后,总结了石墨烯应用面临的挑战。“化学学科拔尖学生培养试验计划”学生科研能力培养探
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