Understanding the effects of water chemistry on the toxicity of copper in an estuarine clam Potamocorbula laevis using the toxicokinetic-toxicodynamic model

河口水化学条件复杂多变，其中盐度和溶解性有机质是影响重金属毒性的关键因素。盐度和溶解性有机质不仅会影响重金属的生物有效性和生物累积，还会影响生物的生理，改变生物对重金属的内在敏感度。本论文选用光滑河蓝蛤为作为模式生物，以毒代动力学-毒效动力学模型为框架，结合稳定同位素示踪实验和毒性测试，研究河口水化学条对铜（Cu）生物累积和毒性的影响，获得研究结果如下： （1）盐度对光滑河蓝蛤Cu生物累积和毒性的影响：当Cu浓度较低时（6-9μg/L），在5-30盐度范围内，Cu的吸收速率常数[L/(g∙h)]随盐度上升而显著降低，且可用经验方程“吸收速率常数=1/(1.35+0.116&#87...Water chemistry of estuarine ecosystems is complex and dynamic. Among the many factors that affecting the toxicity of metals, salinity and dissolved organic matter (DOM) are the two key factors. Salinity and DOM not only affect the bioavailability and bioaccumulation of metals, but also affect the physiology and intrinsic sensitivity of aquatic organisms. In the study, we investigated the effects ...学位：理学硕士院系专业：环境与生态学院_环境科学学号：3312014115168

浅谈我国房地产企业融资格局与调整

本文从对我国房地产企业现存的融资方式的探讨出发,提出在新环境下房企融资格局的调整思路

厦门市有机食品市场分析及发展建议

本文通过实地调研和问卷调查的方式分析了厦门主流超市有机食品的市场情况和当地消费者对有机食品的关注程度、购买意愿、影响消费因素等信息,总结厦门有机食品市场发展中存在的一些问题,进而提出厦门市有机食品市场的发展建议

The Influence of Institutional Investors on The Stock Volatility—in View of The Big Price Movement and Characteristics of Listed Companies

从国际经验看，资本市场的成熟度和机构投资者的参与份额高度相关，以美国为代表的成熟市场中的机构投资者参与份额达到三分之二。中国机构投资者无论是从持股比例还是从市场交易份额来看都较小，当市场上大多数是噪音交易者时，市场更易处于非理性状态。投资者结构的失衡问题引起了国内管理层、业界人士、学界的广泛关注。自21世纪初，监管层对机构投资者的发展予以大量关注和支持，逐步放开各类机构入市门槛。随着机构投资者的队伍不断壮大，股市的非理性投机环境却没有较大改善，机构投资者在其中究竟是发挥了稳定资本市场的功能还是加剧了股市的暴涨暴跌一直也是人们争论的问题所在。 本文采用理论分析和实证研究相结合的方式，从有效市场...Judging from past experience, mature capital markets are highly correlated to institutional investors’ trading shares. For example, institutional investors take two-thirds market shares in The United States stocks. Chinese institutional investors represent a small part of market no matter share of transactions or shareholding. The more noise traders join in, the more irrational will the stock be....学位：经济学硕士院系专业：经济学院_金融学学号：1562013115206

Application of smell identification test in Parkinson's disease in China

目的 建立我国嗅觉识别测验材料与方法,测查帕金森病患者的嗅觉功能,验证测验的有效性,分析其影响因素。方法 选取诊断明确的原发性非痴呆帕金森病患者55例以及与其人口学资料相匹配的健康对照55名作为研究对象,采用中国科学院心理研究所研发的基于中国人群的嗅觉识别测验方法,进行嗅觉识别测验。结果 帕金森病组嗅觉识别测验的正确选择数(19.3&plusmn;5.4)显著少于健康对照组(26.5&plusmn;5.7),差异有统计学意义(t=-6.827,P〈0.01);依据不同年龄段的参考值进行分段比较,发现63.6%的帕金森病患者存在显著嗅觉减退,Hoehn-Yahr分级2~3级显著嗅觉减退的发生率为77.8%;通过帕金森病组与健康对照组受试者工作特征(ROC)曲线分析显示,嗅觉识别测验正确识别数取界值为22.5时,诊断嗅觉减退的敏感度为74.6%,特异度为70.9%;帕金森病患者嗅觉识别测验正确数不受年龄、教育年限、Hoehn-Yahr分级、病程、统一帕金森病评定量表的第三部分得分、MMSE评分的影响(均P〉0.05)。结论 帕金森病患者存在嗅觉识别能力的减退,中国人群的嗅觉识别测验能够有效地测查帕金森病患者的嗅觉功能。</p

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies