气候变化问题多学科协同机制实践研究

由于不合理的人类活动，全球气候正呈现以变暖为主要特征的变化。气候变化及其导致的各种环境事件已经严重影响到人类社会的可持续发展，成为当今国际社会所共同面对的挑战。相关学科基于本学科的研究领域 与研究范畴开展了卓有成效的研究。文章以社会学、伦理学、哲学为视角，横向梳理了相关学科对气候变化问题介入的原因、气候变化问题的认知及相关的研究成果，并进行评述。综合分析和探讨了气候变化问题研究中学科间研究对象、研究目的、研究方法的区别与联系，提出以学科间的自组织系统来研究气候变化问题的观点，进行学科间的跨界交流与探讨，探讨学科间的协调，关注气候变化问题的文化内涵，构建多学科间的研究范式，促进学科间的有机交流与融合，以推进气候变化的减缓与适应行动。</p

Investor Attention and the Timing of Annual Report

作为现代企业股权融资的一种重要途径，股票市场已受到越到越多上市公司 的重视，如何最大限度地增加投资者对公司股票的关注程度，以提高股票的换手 率，进而推动股票的上涨已成为上市公司各类经营活动的一项重要目的。本文以 我国上市公司披露年报这项经营活动作为研究对象，运用有限注意理论，探索了 上市公司择机披露年报对投资者关注程度的影响。为了更好地揭示二者之间的关 系，本文还研究了上市公司经营业绩对其披露年报时间与择机披露行为的影响。 研究发现上市公司会受到好业绩的驱动，择机披露年报，以达到获得更多投资者 关注的目的。 本文以2006-2013年沪深交易所上市的2401家企业（包括主板、中...As one of equity financing methods of modern enterprises, stock market has obtained more and more attention from public companies. How to increase investors’ concerns to stocks to the most degree, improve stock turnovers and promote the rise of the stock price has become one of important purposes of public companies’ business activities. Taking the business activity of the disclosure of the an...学位：经济学硕士院系专业：王亚南经济研究院_数量经济学学号：2772012115264

Design of 13.56 MHz RFID Tag Antenna and Analysis of Fabrication by Screen Printing

阐述了基于13.56 MHz射频印刷标签天线具体的设计方法和制造工艺。以ICOdE芯片为例,描述了整个标签天线结构设计方法,设计并印刷出天线。通过对印刷天线的分析,进而得出印刷天线电感及电容的获得主要取决于设计结构的结论,而对印刷工艺而言,印刷工艺的优化目标之一则是获得较低的天线阻值,从而得到较高的天线品质因子Q,获得理想的天线综合性能,满足感应距离的需要。A design method and manufacturing process of 13.56 MHz RFID tag antenna by screen printing is described.A test structure is designed and screen printed taking the ICODE chip as example.The conclusion is that the inductance and capacitance of a printed tag antenna are dependent mainly on the structure of design.For the printing process,one of the optimization objectives is to acquire a lower antenna resistance,a higher quality factor Q and desired properties to meet the needs of remote sensors

Impacts of storm event on DOM composition and flux in two Jiulong Tributaries with different watershed features

通过调查2014年7月"麦德姆"台风影响期间福建九龙江北溪(流域以林地为主)和西溪(农业流域和城市背景)下游定点站DOM的时间序列,测定样品的DOC含量及其吸收光谱和三维荧光光谱,以评估不同流域背景对河流DOM动力学降雨响应的差异性,并为流域-河口系统的一体化管理提供重要参考。降雨期间,两条河流DOC浓度、吸收系数aCDOM(350)以及总荧光强度均随径流量升高而增大,并在水位下降期持续增加,且西溪增加量明显高于北溪,说明受人类活动扰动大的流域河流有机质对暴雨事件的响应更为灵敏;北溪和西溪的SUVA254分别显示出增大和减小的相反变化趋势,表明林地背景的流域主要冲刷芳香度高的DOM到河流,农业和城市背景则相反;降雨期西溪对九龙江DOM入海通量的贡献率高于北溪,与基流期北溪贡献率占主导恰巧相反,这种碳通量的逆转表明暴雨事件会放大人类活动对下游河口生态环境的影响。Watershed features have great impacts on river DOM composition and flux. In this study, temporal variations in DOM of the North(dominated by forestland)and West(dominated by farmland and urban area)Jiulong River were investigated during the typhoon"Matmo"in July, 2014. The DOM was characterized by DOC, absorption spectroscopy, and fluorescence excitation emission matrix spectroscopy(EEMs)analysis. The DOC concentration, absorption coefficient aCDO(350)and total DOM fluorescence intensity of both rivers increased significantly in both rising and falling hydrograph during the storm event. However, DOM abundance in the West River showed a much greater increase than that in the North River, suggesting more sensitivity of river DOM to rainstorm events in the watershed with greater anthropogenic perturbation. The specific absorption coefficient(SUVA254)of CDOM showed different variation tends between the North and West River,indicating that river DOM in forest-dominant watershed had high aromaticity and average molecular weight. The West River showed higher fluxes of DOM than the North River during storm event, which was opposite to that under the base flow condition. This reversion in DOM export flux suggested that storm event could amplify the influence of human activities in the watershed on the receiving estuarine ecosystems.The present findings are of great significance for the integrated management of coupled river-estuary system.国家自然科学基金项目(41276064,U1305231