1,177 research outputs found

    Study on the learning adaptability of College Freshmen from the perspective of ecosystem ——take B University in Guangdong as an example

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    大学是人生发展的重要阶段,是大学生世界观、人生观、价值观形成的关键时期,是大学新生适应人生的新阶段。在大学新的学习环境,适应能力较强的大学新生能够很快适应大学学习生活。相反,适应能力较差的大学新生,则可能会遇到诸如学习动力不足、不适应大学的教与学、难以合理安排学习时间等学习上的问题,难以适应新的学习环境。因此,最紧要的是提升大学新生的学习能力,帮助大学新生迅速完成角色转变,尽快适应大学新的学习环境。 本研究拟以广东B大学为个案,选取该校大学新生作为研究对象,采用文献研究、问卷调查、访谈等方法,收集该校新生学习方面的资料,归纳总结出该校新生学习适应性问题的现状,并依据生态系统理论,分析该校新生...College study is an important stage in one's life,it is the key period for college students to foster their world outlook, outlook on life and values. It is a new stage for college freshmen to adapt to their life. Under the new environment, students with strong ability of adaptation to environment will adapt to the new environment quickly. On the contrary, those who hasn’t such strong ability will...学位:社会工作硕士院系专业:公共事务学院_社会工作硕士学号:1402013115051

    Impact of Project Governance Mechanisms on Project Value Creation

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    项目可以看作一个临时性的组织以促进母组织战略目标的实现。独特的项目管理体制能够灵活地配置资源、最大程度满足客户需求、迅速应对外界环境的变化和突发状况,因此在各个行业得到越来越广泛的应用。母组织参与一个项目的目标是从中获取期望的价值。但是,传统的项目绩效管理更多关注于项目产出,而不是母组织的价值实现。其中最重要的原因是项目管理者更关注项目的产出,在项目执行过程中更多考虑自身的责任,缺乏宏观和全方位的系统思想。本研究仅着眼于母组织,根据委托代理理论和管家理论,构建项目价值的实现框架。 本研究梳理项目价值要素并建立了构成框架,要素主要包括项目产出效率、组织短期收益、组织长期收益。在实现上述项目价值...A project can be regarded as a temporary organization to conduct the strategic objectives of the base organization. Unique project management system can flexibly configure resources, meet customer demand, and response to environmental changes and risks, and is widely used in various industries. But the traditional project management focus on project output rather than value creation for the base o...学位:管理学硕士院系专业:管理学院_管理科学与工程学号:1772013115109

    Three dimensional efficient regularized meshfree simulations of slope failure induced by rainfall and freeze-thaw processes

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    边坡失稳破坏是一类常见的自然灾害形式。边坡破坏诱发的因素很多,其中尤以降雨引发的滑坡灾害最为突出。同时,随着西部大开发的深入,寒冷地区冻融作用导致的边坡破坏也日益受到重视。然而,边坡失稳涉及到土体骨架、水(冰)、空气等多相耦合即相互作用,是一个复杂的非饱和土体大变形损伤破坏过程,需要借助精确高效的数值方法进行分析、预测和预防。本文利用无网格法仅采用节点离散、适于大变形分析的优点,着重研究了降雨及冻融影响下边坡破坏的三维高效无网格数值模拟方法。 本文首先针对降雨诱发边坡破坏问题,从守恒定律出发讨论了边坡非饱和土体的多相耦合控制方程及其等效积分弱形式。为了提高计算效率和解决边坡损伤破坏中由应变软...Slope failure is one of the most frequently occurred natural disasters. Among many factors causing slope failure, rainfall is widely recognized as a major driving force. Meanwhile, with the rapid development in China western regions, the slope failure caused by the freeze-thaw processes of the water in the slope also become an important issue that deserves thorough investigation. However, the slop...学位:工学硕士院系专业:建筑与土木工程学院_工程力学学号:2532012115170

    The investigation on characteristics of cascaded Er3+-doped superfluorescent fiber sources

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    本文主要研究了为光纤通信、光纤无源器件测试、光纤光栅传感系统、光纤陀螺等提供光信号的掺铒光纤光源。从理论和实验两个方面以单双级结构对比的形式分析了参数变化对以掺铒光纤为增益介质的光纤光源性能的影响。在理论模拟方面主要研究了C波段双程后向结构与级联双程后向结构,L波段双程前向结构与级联双程前向结构的特性;在实验方面主要研究了级联双程前向结构L波段超荧光光源的特性。实验测试结果和理论模拟结果相符合。本文的分析研究对掺铒光纤宽带光源的设计和制作具有一定的指导和参考意义。 本文第一章简单回顾了光纤通信的发展历史和目前所存在的瓶颈问题以及对未来发展的展望,然后对超荧光光源的研究背景和应用特色做了较为详...In this paper, Er3+-doped superfluorescent fiber sources (Er-SFS) are investigated to provide the optical signals for applications in many fields, such as optical communications, optical passive devices test, optical fiber grating sensor, optical fiber gyro. Compared the one-stage with two-stage configurations, we analysis theoretically and experimentally a few significant parameters effect on the...学位:工学硕士院系专业:信息科学与技术学院通信工程系_通信与信息系统学号:20043003

    Study on Controlling Shareholder's Behavior Change and Minority Shareholder’s Interest Protection——take listed companys’ownership structure change as the research perspective

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    中国证券市场经历从股权分置到股权全流通这一制度变革后,整个市场的生态环境和交易环境将发生深刻变化,作为现代公司金融研究的核心问题——控股股东与中小股东之间的利益冲突问题在新环境下必然表现出新的特点。在这一背景下,本文以上市公司股权结构变化为视角,研究后股权分置时代控股股东侵占中小股东利益行为的变化,并在此基础上研究全流通环境下保护中小股东利益的对策。目前,国内针对这一问题还缺乏较系统的研究和论证。因此,随着全流通时代的临近,本文对这一问题的研究,无论是从理论角度还是从实践角度,都是非常必要的,而且是紧迫的。 本文的研究结论是:控股股东的行为特征与上市公司的股权结构密切相关;后股权分置时代,控...China's securities market is experiencing from equity separation to equity full circulation, the entire market environment will undergo profound changes. As a core issue of modern corporate finance, the interest conflict between controlling shareholder and minority shareholder will demonstrate many new features in the new environment. Against this background, this paper takes listed companys’ owne...学位:经济学博士院系专业:经济学院金融系_金融学(含保险学)学号:1562007015372

    On the Civil Liability of Express Company

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    快递公司活跃在电子商务的应用领域,给社会提供了方便与快捷的物流服务,但风险与安全问题也一直伴随着快递业务的全过程。从快递公司的法律适用问题到违约责任问题再到侵权责任问题,由此而生的矛盾纠纷层出不穷,不但困扰着交易双方,也给法律能否得以准确适用提出了难题。如何使快递公司运营过程中的安全性得到保证、风险得到控制,关系着快递行业的健康发展,同时也考验着法律人的智慧。 每一次权利的冲突都可能带来法律的完善与进步,如何平衡新形势下快递公司与消费者、托运人之间的权利义务是法律人无可推卸的责任。 本论文除绪论和结论部分,共分为以下四章: 第一章,阐述快递公司的发展简况和运营风险。通过相关法律主体的比较...Express company has an active show in the field of e-commerce applications, as it provides convenient and efficient logistics services for the whole society. But the risk and safety issues have been accompanied by the whole process of the express business. From the law application problem of the express company, to contractual obligations problem, then to tort liability issues, there have endless ...学位:法律硕士院系专业:法学院法律系_法律硕士(JM)学号:1302009115034

    Investigation of Piezoelectric Ultrasonic Technology Based on MEMS

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    本文主要研究基于MEMS的压电超声技术,包括超声检测、超声微流体驱动技术和ZnO压电薄膜材料及器件的研究,研究课题属于当前微机电系统中较为前沿和创新的学科领域,如下所述: 1、超声共振谱技术(ResonantUltrasoundSpectrum,简称RUS)是上个世纪九十年代发展起来的一种表征材料特性的方法,该方法成为现代超声检测的较为常用的技术手段,其测量的范围广泛,在MEMS领域内,可用于微型器件的检测。在RUS测量过程中,试件样品通常被夹在两片压电换能器之间,压电换能器可以采用PZT或其他的压电陶瓷或晶体。但是,因为压电片表面是光滑的,试件难以准确地夹在两片压电片中间并且保证每次测量装...In this thesis, we present the investigation of piezoelectric ultrasonic technology that is used into the microfluidic and MEMS ultrasonic testing device. New ultrasonic transducer, microfluidic device and ZnO piezoelectric thin films based on MEMS technology will be studied as follows: 1、Resonant ultrasound spectrum (RUS) has been developed since 1990s, which is a dynamic method to test the mech...学位:工学硕士院系专业:物理与机电工程学院机电工程系_测试计量技术及仪器学号:1992006115187

    Design and Realization of a Multi-Channel MAC Protocol MCMS in Wireless Sensor Networks

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    无线传感器网络是计算机科学领域一个新的研究热点,它在诸如地理探测、环境监测、国防军事、精细农业以及运输业、工业、商业等各个领域的广阔应用前景引起了学术界和工业界的高度重视。无线传感器网络的关键技术主要包括MAC协议、路由协议、低功耗技术、数据融合、网络管理、定位和安全等。其中,无线传感器网络的MAC协议直接控制物理层并向网络层提供服务,对传感器网络的性能有极大影响,是保证传感器网络高效通信的关键点和难点之一。本文主要针对无线传感器网络的MAC协议展开了研究。 本文通过深入研究Adhoc网络和传感器网络中各种经典的单信道和多信道MAC协议,总结出了无线传感器网络的信道特征,并针对此特征设计了无...Wireless Sensor Network (WSN) is a new research area of computer science and technology. As it has a wide application future in geophysical monitoring, precision agriculture, habitat monitoring, transportation, military systems and business processes, both academia and industries are very interested in it. Research of WSNs communication protocols includes medium access control (MAC) protocols, rou...学位:工学硕士院系专业:信息科学与技术学院通信工程系_通信与信息系统学号:2005130241

    One Method of Standard Recognition of Underwater Acoustic Signal

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    研究了制式识别的特征参数提取方法,以小波变换为主,结合瞬时频率统计算法、高阶谱等多种识别算法,对现有水下通信信号调制方式进行类间、类内识别,包括多载波(OFDM)和单载波(MFSK、MPSK和QAM)。仿真结果表明,文章所采用的方法在低信噪比下的识别概率均能保持在82%以上,具有较好的识别性能。This article did a research on themethod of characteristic parameter obtainment. Based on Wavelet Transform, instantaneous parameter extraction and higher-order cumulants are used to recognize the Underwater Sound Signal, including Single carrier(MFSK,MPSK, QAM) and multicarrier(OFDM). Simulation results show that the rate of modulation identification is able to keep 82% above in the situation of low SNR, meaning that the proposed method has a good ability of identification.国家自然科学基金(61471309,61671394); 中央高校基本科研业务费专项资金(20720170044

    An Analysis of Yue Fei\u27s lmage in Court Operas of the Qing Dynasty

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