252 research outputs found
A Study on Crowdsourcing Operating Management Applied to A Company in the Context of Internet
通讯技术和信息技术更新换代带来信息社会的快速发展,Web2.0网络时代的到来,促生了一种全新的互联网模式,即众包模式。众包模式是指一个公司或机构把过去由员工执行的工作任务,通过互联网平台和技术,将其任务量分发出去,使资源范围由企业内部延伸至外部,统筹运行内外各要素,形成高效率的具有独特竞争力的运行系统。总体来说,它是大众智慧的商业价值的凸显,因此众多互联网众包企业以及寻求众包模式转型的企业在公司管理层面上遇到了前所未有的挑战。因此,基于众包模式并针对互联网企业的特性,本文研究并探索了新型的企业众包模式运营,发挥出众包模式的优势,提升企业的核心竞争力。 本文对众包的概念及模式、众包理论基础以及...Communication and information technology upgrading bring the rapid development of information society. The advent of the era of web network led to a new mode of the Internet, namely “crowdsourcing”. It refers to a company or organization used to work performed by the staff of the mission, but now through the Internet platform and technology, the amount of tasks is distributed by the enterprise ext...学位:工商管理硕士院系专业:管理学院_工商管理硕士(高级管理人员工商管理硕士)学号:X201515608
H_∞ State Feedback Control for A Class of Singular Switched Linear Systems
研究了一类不确定切换广义系统的H∞状态反馈控制问题,以线性矩阵不等式(lMI)的形式给出了该类系统的鲁棒稳定且具有H∞扰动衰减度γ充分条件和控制器以及切换策略。将正常系统的lyAPunOV函数研究方法推广到切换广义系统。H∞ state feedback control problem is investigated for a class of singular switched linear systems.a sufficient condition on decrease de-gree of γ for the existence of subcontrollers that is expressed by linear matrix inequalit(LMI) is presented under an appropriate switching law.福建省青年科技人才创新项目资金(2005J006);厦门大学985二期信息创新平台项
The practice and exploration of the Investigators testifying in court
侦查人员出庭作证制度是近年来司法实践中研究的重点课题之一,但大部分研究只是简单的以英美法系制度为蓝本,并没有认识到制度最终要根植于中国刑事诉讼体系内。本文试图从厦门市侦查人员出庭作证实践入手,借以分析面临的改革瓶颈,探究制度和价值成因,并从现阶段中国的诉讼价值观出发,探索侦查人员出庭作证制度的本土化构建。 本文共分为三个章节进行论述: 第一章概括我国侦查人员出庭作证制度的历史沿革,勾勒立法与实践情况。总结厦门市侦查人员出庭作证的现状与特点,指出实践面临的侦查人员是否具备证人资格、出庭作证是否具有特殊程序、出庭作证的法律效力三个认识瓶颈并予以阐述。 第二章先通过分析制度成因,指出建立在当事...Investigator testifying in court is the judicial practice in recent years in the research of key issues. But most of them simply to the Anglo-American law system as the blueprint, and did not recognize the system eventually to be rooted in Chinese criminal procedure system. This article attempts from the Xiamen City investigators give evidences in court practice proceed with, analysed the reform b...学位:法律硕士院系专业:法学院法律系_法律硕士(JM)学号:X200612009
Aesthetic Features about Cloudgate
本论文的核心在于论述云门舞集的艺术特征。论文分两部分论述云门舞集的美学特征:第一部分论述云门舞集对西方现代舞蹈美学的吸纳与融化;第二部分论述云门舞集对中国古典美学的吸纳与融化。在第一部分中,首先论述西方现代舞的基本美学特征,从身体、动作和力进行论述,并论述了云门舞集是如何吸纳了西方现代舞的这些特征。接着,试图从西方现代舞的符号学特征解释云门舞集的美学特征。在第二部分中,首先论述云门舞集体现出来的中国古典美学特征,从中国古典美学中“气”的渊源,“气”与舞蹈艺术的结合以及云门舞集对“气”的诠释三方面展开论述。其次,论述了云门舞集经由意境的营造实现对宇宙生命节奏的表达。从中国古典美学意境的营造入手,...The topic of this thesis is to present artistic features of Cloudgate(A famous dance group in Taiwan). The thesis has been divided into two parts: the first one is on how Cloudgate absorb modern Western dance’s aesthetics. And the second one is on how Cloudgate absorb classic Chinese dance’s aesthetics. The first part starts with discussion on basic aesthetic features of modern western dance. Ther...学位:文学硕士院系专业:人文学院中文系_艺术学学号:2005130007
科幻影视对新媒体的展望与批判
作为以创意的科幻性、载体的影像性为特征的艺术类型,科幻影视对新媒体的审视具备前瞻性,因而成为我们认识当今新媒体发展趋势的重要参考系。根据科幻影视的描写,未来新媒体开拓进取的途径集中在身体新功能的开发、网络新应用的拓展、装置新特性的构思等方面;新媒体起作用的范围将从地表通信扩展到星际通信,从媒介通信扩展到脑际通信,从同维通信扩展到维际通信。在肯定新媒体服务社会、造福人类的重要性的同时,科幻影视也预言了新媒体走火入魔的可能性,这是通过对媒体世界化、现实化与灾难化的描写展现的。国家社会科学基金艺术规划项目“数码艺术潜学科群研究”(项目编号:13BA008)
Mountain Architecture Design Method Based on GIS
山地建筑学是一门综合的学科,传统的设计方法更趋向于二维的、静态的研究,缺乏定量的科学分析和先进的科技手段。本文以ArCVIEW gIS 3.2为软件平台,介绍了在山地建筑设计中引入gIS的设计思维和工作方法,旨在更为科学合理地指导建筑设计构思和创作。Mountain Architecture is a comprehensive subject.On which traditional design method has the problems of two-dimension,statics,as well as lack of enough scientific technology.Aiming at those problems,this paper discusses some lines of thinking on a GIS based Mountain Architecture design method in ArcView GIS software
Influence of Particle Damper Configurations on the Dynamic Characteristic for Gear Transmission System
齿轮传动正朝着高速、重载和高精度方向发展,对其动态性能要求越来越高。颗粒阻尼通过颗粒间、颗粒与阻尼器壁间的非弹性碰撞和摩擦作用耗能,具有减振效果; 显著、耐高温、各向同性、对原结构改动小等优点。利用有限元法对齿轮进行了有预应力的模态分析,通过齿轮系统动力学分析,研究单双齿啮合激励对齿轮传动的; 影响;同时建立齿轮传动离心场中颗粒系统耗能模型,将离散元法计算颗粒系统耗能和试验测试对比,分析阻尼器配置对齿轮传动系统动特性的影响。结果显示,阻; 尼器配置方案是影响齿轮传动系统动特性的一个重要因素,在阻尼孔中填充一定数量的颗粒,当阻尼器总体积相同且齿轮结构静刚度相差不大时,阻尼器个数越多颗; 粒系统能耗越大;当阻尼孔直径相同时,阻尼孔个数越多颗粒系统总能耗越小;当阻尼孔个数相同时,阻尼孔直径越大颗粒系统能耗越小。通过试验和仿真对比验证; 了模型的正确性,为颗粒阻尼在离心场中的应用提供重要的理论依据。The gear transmission is advancing towards high speed, heavy load and; high precision. The requirements for the dynamic performance of gear; system are urgently proposed. The particle damping dissipates mechanical; system energy through inelastic collisions and friction between; particles. It is an effective and simple measure for vibration; reduction. It has many advantages, such as isotropy, high temperature; resistance and less modification to the original structure. This paper; has conducted the prestressed modal analysis of gear system by the; finite element method. Based on the dynamics analysis of gear system,; the effect of single tooth and double teeth meshing incentive on gear; transmission has been analyzed. The energy dissipation model of particle; damping for gear transmission in centrifugal field has been established.; By contrasting theoretical analysis and the test, the effect of damper; configuration on dynamic characteristic of gear transmission system is; analyzed. The results show that damper configuration is an important; factor of the dynamic characteristic for gear transmission system.; Filling a certain number of particles, when the gears static stiffness; are similar and the total dampers volume are equal, the more damping; hole, the greater the total energy loss. When the damping holes diameter; are the same, the more number of damping hole, the smaller the total; energy loss. When the damping hole number is the same, the bigger the; diameter, the less the total energy loss. Experimental results are; consistency with the theoretical analysis. These results can provide; guidelines for the application of particle damping in centrifugal field.国家自然科学基金; 福建省重点科技专项; 中央高校基本科研业务费专项资金; 福建省高端装备制造协同创新中心资助项
麝香组分诱导成年大鼠骨髓间质干细胞体外定向分化为神经元样细胞的能力
收稿日期:2002 -08 -18
摘 要:【目的】探讨麝香组分体外诱导成年大鼠骨髓间质干细胞(adult rat bone marrow mesenchymal stem cells , rBMMSCs)
定向分化为神经元样细胞的能力。【方法】分别采用含麝香多肽或麝香酮的L-DMEM 培养基体外定向诱导第5 代至10
代的rBMMSCs , 并分别应用相差显微镜观察神经元样细胞和免疫细胞组化检测神经元样细胞所表达的神经干细胞特异性标
志(nestin)、神经元特异性标志[ 神经元特异性烯醇化酶(neuron specific enolase , NSE)和神经丝蛋白(neurofilament , NF)] 及星
形胶质细胞特异性标志[ 胶质纤维酸性蛋白(glia fiber acid pro tein , GFAP)] , 并进行神经元样细胞记数分析。【结果】成年大鼠
BMMSCs 在加入含麝香多肽的无血清L-DMEM 培养基诱导后, 发现细胞胞体收缩, 突起伸出, 形似神经元;免疫组化显示诱
导出的神经元样细胞NSE 、NF、nestin 表达阳性, GFAP 阴性。神经元样细胞记数分析发现:rBMMSCs 经过麝香多肽诱导后,
NSE+神经元样细胞和NF-H +神经元样细胞的比例分别高达93.5 和88.2 %;而用含麝香酮的无血清L-DMEM 培养基却无
上述变化。【结论】麝香多肽能在体外诱导rBMMSCs 定向分化为神经元样细胞, 而麝香酮却无此能力。从而可为神经组织工
程和临床上各类神经疾病的神经移植及细胞替代治疗提供大量的种子细胞, 为临床上各类神经疾病的治疗提供一种新的治
疗策略。
有序Cram-Schmidt正交化在研究无取向硅钢质量中的应用
无取向硅钢工艺是一个多变量系统,影响产品质量的素多,本工作从生产现场收集了147组数据,应用有序Gram-Schmidt正交化等多元分析方法处理数据,找出影响质量的主要因素,根据PRESS判据排除多噪音的因素,建立预报能力较强的模型,并从分析中找出提高质量的措施
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