186 research outputs found

    A Research on Sales Tactic of Company V under New Market Environment

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    中国造纸工业经过十几年的高速发展,纸和纸板的产量已经超越美国成为全球第一,与之同时我国造纸也出现了产大于销的局面,造纸企业之间的竞争不断激烈,造纸企业的吨纸利润不断下降。“十八大”后,我国政府对环境保护的要求越来越严格,淘汰落后产能的力度不断加大,造纸行业受到巨大的冲击。造纸设备市场也随着中国造纸行业的变化而受到影响,以V公司为代表的全球一流的造纸设备供应商为中国的造纸行业装备技术现代化提供了最先进的设备和技术,V公司纸机项目业务主要是专注于高端市场,而在高端市场的竞争对手只有一家。由于互联网及移动智能终端的发展导致文化纸的消费量急剧下降,白卡纸也出现产能过剩,以文化纸机和白卡纸机为代表的高端...After over ten years high speed development of Chinese paper industry, China already becomes top one in the world regarding total paper production capacity. Meanwhile, China also confronted over capacity of paper production, the competition between paper makers is increasingly severe and the specific paper profit is dramatically lower. Since “18th CPC National Congress”, China government implement...学位:工商管理硕士院系专业:管理学院_工商管理硕士(工商管理硕士)学号:1792013115067

    我国科学资源分配过程中的问题及其对策研究

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    科学资源分配对于一个国家科学研究活动的整体效率和科学创新能力提高都起着尤为关键的作用。本文在我国建设创新型国家这一背景下,从资源投入及分布状态、宏观管理结构、投入方式及机制、微观管理机制四个层面认真反思了我国现有科学资源分配体系的现状及所存在的问题,并就如何解决现有科学资源分配体系所存在问题提出了对策建议,以期对我国科学资源分配体系的未来发展路径提出新的思考和建议

    Detection on Proper Wearing of Seat Belt Based on Infrared Mark Vision

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    针对安全带佩戴规范性仍未引起充分重视的现实问题,借助具有红外敏感表面涂层标记的三点式安全带,基于标记视觉和图像处理技术提出一种安全带佩戴规范性的; 集成检测方法:利用增强现实技术快速识别定位安全带标记,在此基础上分别设计数量阈值算法、模糊聚类阈值算法、曲线拟合松弛度算法和肩部外轮廓交点定位算; 法,用以进行安全带是否佩戴和佩戴形式、松紧程度、高低位置是否规范等4种判断,从而实现安全带是否规范佩戴的检测目标。实验结果表明,在各种成像条件和; 图像背景干扰下,对应上述4种判断的识别准确率分别为95.4%, 93.1%,; 79.5%和85.3%,而安全带佩戴规范性的综合识别准确率达89.5%,验证了所提出算法的准确性、有效性和适应能力。In view of the problem that whether seat belt is properly used or not; haven't yet attracted sufficient attention,an integrated detection; method of the proper use of seat belt is proposed by means of the; three-point safety belt with infrared-ray-sensitive coat marks and based; on mark vision and image processing technologies: Augmented reality; technology is used to rapidly identify and locate the marks on seat; belt,based on which the algorithms of number threshold,fuzzy clustering; threshold,curve fitting relaxation and shoulder profile intersection; locating are developed respectively to conduct four judgments of weather; seat belt is used or not,the wearing forms of seat belt, belt tightness; and belt height,and hence achieve the detection goal of the proper use; of seat belt. Experiment results show that under various image forming; conditions and image background interferences,the identification; accuracies of the algorithms used corresponding to above mentioned four; judgments are 95.4%,93.1%,79.5% and 85.3% respectively with an overall; identification accuracy of 89.5%,verifying the correctness,effectiveness; and adaptability of the algorithms proposed.国家自然科学基金; 福建省自然科学基

    Study on Corrosion Resistance of Zr-0.8Sn-1Nb-0.3Fe Alloy after Kr~+ Ion Irradiation

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    采用高压釜腐蚀实验研究了2种不同制备工艺下的Zr-0.8Sn-1Nb-0.3Fe合金(1#,2#)经360℃、5~25; dpa的Kr~+辐照后、在400℃/10.3 MPa过热蒸汽中的耐腐蚀性能,用透射电子显微镜(TEM)、扫描电镜(SEM)、; X射线衍射仪(XRD)分析合金腐蚀后氧化膜显微组织结构。结果表明,100; d腐蚀后,合金的腐蚀增重随着辐照剂量的增加而增加,由于1#合金中的第二相比2#合金更为细小、弥散,相同辐照剂量下,前者的腐蚀增重较低。腐蚀转折前; ,从蒸汽腐蚀侧到锆合金基体,氧化膜中的氧含量逐渐降低,靠近蒸汽侧的氧化膜主要由等轴晶形态的单斜ZrO_2组成,而基体界面处的氧化膜主要为柱状晶形; 态的四方ZrO_2和六方Zr_3O;腐蚀转折后,基体界面处的氧化膜呈"花菜"状生长,"花菜"尺寸大小与氧化膜生长速率的高低及不均匀生长趋势的大小; 呈对应关系。The corrosion resistance of Zr-0.8Sn-1Nb-0.3Fe alloys prepared by two; different processes was investigated in 400℃/18.6MPa superheated steam; by static autoclave after irradiated by 360℃ with Kr~+-irradiation of; 5~25 dpa. The microstructures of oxidation film after corrosion were; analyzed by TEM, SEM, and XRD. The results showed that the corrosion; weight-gain increased with the irradiation dose, while the weight-gain; of 1# alloy with smaller and more dispersive SPPs than 2# alloy was; lower under the same irradiation dose. Before corrosion turning, the; oxygen content in the oxidation film decreased from the steam-side to; the zirconium matrix. The oxidation film beside the steam-side was; mainly composed by equiaxied monoclinic ZrO_2 crystal, while near the; film/matrix interface by columnar quartet ZrO_2 crystal and hexagonal; Zr_3O crystal. After transition of corrosion weight, the film near the; interface grew like cauliflowers, and the size of cauliflowers were; corresponded to the growth rate and uneven growth trend of oxidation; film

    Energy Saving Route Finding Mechanism in Underwater Acoustic Sensor Networks

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    提出了水声传感网中能量有效的路由方案.结合水声信道的特点对水下传感网中的能耗因素进行分析,得出给定源宿节点之间的距离时路径消耗总能量与中继节点数的关系.对定向扩散协议进行改进,在初始化阶段根据汇聚节点和邻居节点的地理信息,求出源节点到目的节点的理想的最优能量路径.仿真结果证明,该方案能减少洪泛,只需选择1条较优路径,有效地节省了能量.An energy-efficient routing scheme is presented for underwater acoustic sensor networks(UW-ASN).Firstly,the factors affecting energy consumption in UW-ASN are analyzed in light of underwater channels,the relationship between numbers of relay nodes and energy consumption is obtained for given source-destination distance.The directed diffusion routing scheme is modified in the initial diffusion phase to find the optimal route based on the geographic information between a sink node and its neighboring nodes.Simulation shows that the proposed scheme can reduce the flooding cost,select an energy-efficient route,and save more energy.国家自然科学基金项目(60672046);集美大学优秀青年骨干教师基金项目(2008B002

    宝黛相争 谁伴宝玉欧洲游?

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    部门经理应当如何处理公与私的矛盾?领导面对复杂的人际关系,应该采取何种处事原则?家族企业中的空降CEO,如何应对各种人事矛盾避免引火烧身

    In situ probing electrified interfacial water structures at atomically flat surfaces using Raman spectroscopy

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    自然界中水无处不在,人们对水分子的研究已经长达一个多世纪。特别是在材料表面,从原子结构层面理解界面水所发生的各种物理和化学过程,将有利于指导能源和环境领域中开发更好的技术和器件。文献中采用振动光谱已经推知了水在金属界面的不同构型,如四配位水、三配位水、表面特性吸附水、自由水等。然而,仍然缺乏这些界面水在不同电位下清晰的构型图像。李剑锋教授课题组采用不受体相水干扰的表面增强拉曼光谱,首次在金(111)和(100)单晶电极表面上获得了界面水的拉曼信号,并且在析氢反应过程中原位观测到了界面水的两种构型转变。发现界面水随着电位的负移,由“平行”结构向“单端氢朝下”,再向“双端氢朝下”变化。程俊教授课题组采用从头算分子动力学理论方法,模拟出不同电位下,在双电层中界面水的三种构型以及相应的氢键数目,与实验数据很好地吻合,进一步揭示了双电层的原子级结构。该研究首次在实验和理论层面,将界面水的构型转变以及氢键断裂与精确的电极电势标尺进行关联,对探知双电层的三维结构具有指导性意义。 该研究工作通过厦门大学校内合作完成,化学化工学院李剑锋教授和程俊教授为通讯作者,田中群教授提供了重要指导。李超禹博士(现美国麻省理工学院博士后)和乐家波博士(现能源材料化学协同创新中心博士后)为共同第一作者,王耀辉博士生在实验上提供了帮助,物理系的陈舒博士和杨志林教授为本工作开展了电磁场增强计算【Abstract】Molecular structures of solid/liquid interfaces are of fundamental interest, and play significantly in the efficiencies of energy storage and conversion. To elucidate the structures of electric double layers at electrochemical interfaces under bias potentials, we have collaborated in situ Raman spectroscopy and ab initio molecular dynamics, and for the first time distinguished two structural transitions of interfacial water at electrified Au(111) and Au(100) single crystal electrode surfaces. Towards negative potentials, the interfacial water molecules evolve from structurally “parallel” to “one-H-down”, and further to “two-H-down”.Concurrently, the number of hydrogen bonds among the interfacial water shows an overall decrease along with the negative shift of the potential, and undergoes two transitions as well. Our findings shed light on fundamental understanding of electric double layers and electrochemical processes at the interfaces.National Natural Science Foundation of China (Grants No. 21373166, 21522508, 21775127, 21521004, 21321062 and 21621091). 该工作得到国家自然科学基金委的大力资助,也得到了固体表面物理化学国家重点实验室、谱学分析与仪器教育部重点实验室、能源材料化学协同创新中心的支持

    类泛素蛋白及其中文命名

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    泛素家族包括泛素及类泛素蛋白,约20种成员蛋白.近年来,泛素家族领域取得了迅猛发展,并已与生物学及医学研究的各个领域相互交叉.泛素家族介导的蛋白质降解和细胞自噬机制的发现分别于2004和2016年获得诺贝尔奖.但是,类泛素蛋白并没有统一规范的中文译名. 2018年4月9日在苏州召开的《泛素家族介导的蛋白质降解和细胞自噬》专著的编委会上,部分作者讨论了类泛素蛋白的中文命名问题,并在随后的\"泛素家族、自噬与疾病\"(Ubiquitinfamily,autophagy anddiseases)苏州会议上提出了类泛素蛋白中文翻译草案,此草案在参加该会议的国内学者及海外华人学者间取得了高度共识.冷泉港亚洲\"泛素家族、自噬与疾病\"苏州会议是由美国冷泉港实验室主办、两年一度、面向全球的英文会议.该会议在海内外华人学者中具有广泛影响,因此,参会华人学者的意见具有一定的代表性.本文介绍了10个类别的类泛素蛋白的中文命名,系统总结了它们的结构特点,并比较了参与各种类泛素化修饰的酶和它们的生物学功能.文章由45名从事该领域研究的专家合作撰写,其中包括中国工程院院士1名,相关学者4名,长江学者3名,国家杰出青年科学基金获得者18名和美国知名高校华人教授4名.他们绝大多数是参加编写即将由科学出版社出版的专著《泛素家族介导的蛋白质降解和细胞自噬》的专家

    Synthesis of magnetic, fluorescent and mesoporous core-shell-structured nanoparticles for imaging, targeting and photodynamic therapy

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    通讯作者地址: Chen, XL (通讯作者),Xiamen Univ, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R ChinaA synthetic method to prepare novel multifunctional core-shell-structured mesoporous silica nanoparticles for simultaneous magnetic resonance (MR) and fluorescence imaging, cell targeting and photosensitization treatment has been developed. Superparamagnetic magnetite nanoparticles and fluorescent dyes are co-encapsulated inside nonporous silica nanoparticles as the core to provide dual-imaging capabilities (MR and optical). The photosensitizer molecules, tetra-substituted carboxyl aluminum phthalocyanine (AlC(4)Pc), are covalently linked to the mesoporous silica shell and exhibit excellent photo-oxidation efficiency. The surface modification of the core-shell silica nanoparticles with folic acid enhances the delivery of photosensitizers to the targeting cancer cells that overexpress the folate receptor, and thereby decreases their toxicity to the surrounding normal tissues. These unique advantages make the prepared multifunctional core-shell silica nanoparticles promising for cancer diagnosis and therapy.NSFC21021061,20925103,20871100,Fok Ying Tung Education Foundation 121011 NSF of Fujian Province 2009J06005 Fundamental Research Funds for the Central Universities 2010121015 Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministr
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