学术图书馆学科导航门户资源类型表的设定

在对DC和ROADS以及SOSIG、INFOMINE和CSDL等大型学科导航门户对资源类型设定的调研基础上,提出了区分和设定资源类型的原则,并根据该原则设定了适合于CALIS学科导航门户建设的资源类型表

Design of tracking system for marine moving object

为实现对海上运动目标的实时跟踪,克服跟踪效果易受到严重遮挡影响的缺点,建立了一套实时跟踪系统,并且结合目标的运动信息与新的模型更新策略,对均值漂移与卡尔曼滤波器相结合的跟踪算法做出了改进。当运动船只被遮挡的比例较大时,先用估计出的目标速度矢量更新卡尔曼滤波器,并用相应的模型更新策略更新目标模型以提高模型相似性度量的精确性,再单独利用滤波器进行跟踪,取得了较好的跟踪效果。实验结果表明,该系统可以较好地实现海上运动目标的跟踪,并且改进后的算法具有良好的实时性和鲁棒性。To accomplish the real-time tracking for the marine moving object and overcome the defect of the susceptibility to severe occlusion,a set of real-time tracking system for the moving object at sea is designed.In virtue of the motion information and a new kind of model update strategy,some improvements are made for tracking algorithm combining the mean-shift with Kalman filter.When the moving vessel is largely blocked,Kalman filter is updated by the prior estimated velocity vector,and the accuracy of model similarity measurement is improved by utilizing the model update strategy,then the filter is exploited to implement tracking.The algorithm achieved good tracking effect.Experimental results show that the system implement marine moving object tracking with good real-time performance and robustness

Fast and effective method for video mosaic

针对现有的视频图像序列拼接方法处理速度慢的问题,提出一种基于Surf特征的快速有效的拼接算法。该算法用鲁棒性强且计算性能优越的Surf算子取代传统的SIfT算子进行特征点提取;在特征点匹配方面,提出了一种基于哈希映射和双向最近邻距离比的匹配算法,可以快速有效地获得特征点间的对应关系。为了消除由于运动物体干扰带来的误匹配,采用随机采样一致性(rAnSAC)方法来消除外点确保匹配的有效性,再通过最小二乘法估计视频帧之间的全局运动参数,最终拼接形成全景图。实验结果表明,该拼接算法快速有效,鲁棒性强,具有较高的使用价值。As the existing methods for video mosaic take high computational costs,a fast and effective algorithm based on SURF feature for video mosaic is proposed.The algorithm uses SURF method with strong robustness and superior performance to extract feature instead of SIFT.At the aspect of feature matching,a novel matching scheme based on hash mapping and bidirectional nearest neighbor distance ratio is presented,which can quickly and effectively obtain the relationship between the features.In order to exclude the error matchings,a RANSAC technique is applied to eliminate outliers to ensure effectiveness of the matched pairs,and then the global motion parameters are estimated by a least-squares solution,finally panorama from video sequence is achieved using the parameters.Experimental results show that the method with strong robustness performs fast and effectively and has highly valuable in practice

不同季节垃圾填埋场周围重金属污染特征及评价

采集漳州市某生活垃圾填埋场周围冬夏两季的地表水(包括渗滤液)、土壤以及植物样品,分析9种重金属总量的季节性变化.结果表明,冬季地表水中Zn和As,土壤和植物中的Cd和As的含量均大于夏季,而夏季波动性强于冬季;夏季渗滤液中总Hg的含量明显高于冬季,其余变化不明显.地表水重金属含量均低于地表水环境质量Ⅴ类标准限值,渗滤液中所有重金属含量均低于污水排放二级标准限值.土壤中重金属Cd、As和Pb的污染最重,已达到重度污染,冬季的污染明显高于夏季.冬季植物富集能力强于夏季,细叶芒对Cd的富集能力较强,可作为重金属污染修复的先锋植物.环保公益性行业科研专项(201509054)资助~

越南民间信仰中的福神信仰探究

中越两国文化源远流长,越南文化与中国文化有着一定的相似性。中越两国民间都有福神信仰之说。与中国的福神信仰相比,越南的福神信仰有其独特之处,如形成的路径及种类与中国不同。本文主要论述越南福神的起源、发展及对越南社会和人民的精神信仰所起到的作用。“2013年云南省高等学校云南农业大学东南亚南亚语种人才培养示范点-越南语”项目阶段性成

A case study of cumulative effects assessment for harbor planning in China

累积影响评价是战略环境评价的主要方法和重要内容之一,但目前还缺乏通用的评价程序和方法。通过识别港口规划的累积影响源和途径,建立了基于水动力数值模型的累积影响评价的量化评估和分析框架。以厦门港嵩屿港区规划为例,通过对海湾纳潮量及各敏感点流速的模拟,计算淤积量及其分布变化,进而推测海域水质和底质变化,并分析了由此引起的海洋生物群落的变化趋势。通过比较不同岸线方案的累积影响,为港区岸线优选提供了科学判据。实践表明,该方法框架综合运用定量预测和定性分析手段,其结果能为港口规划的战略环境评价提供科学依据。 【英文摘要】 Cumulative effects assessment (CES) has become an important approach and also a key component of the strategic environmental assessment due to the increased recognition that most significant environmental changes are results of combined effects of many individual impact factors. Analyzing combined environmental effects is simple in principle but difficult in practice due to a lack of simple and effective CES methods and procedures. The paper presents a case of CIE for the harbor planning project for Songyu ..

SNX14 deficiency-induced defective axonal mitochondrial transport in Purkinje cells underlies cerebellar ataxia and can be reversed by valproate

共济失调是一类以运动协调性紊乱为主要特征的神经系统症状，临床表现包括步态不稳、丧失平衡、吞咽困难、眼球运动异常、肌张力受损等。厦门大学医学院神经科学研究所王鑫教授团队首次从轴突线粒体运输这一全新视角揭示了一类遗传性共济失调的发病机制，并发现抗癫痫药--丙戊酸大幅度减缓模型小鼠的疾病进程，具有较强的转化应用价值，有望为共济失调提供新的治疗手段。 该研究工作由王鑫教授指导完成，厦门大学医学院助理教授张洪峰和博士生洪育娟共同完成主要实验工作。Loss-of-function mutations in SNX14 cause autosomal recessive spinocerebellar ataxia 20, which is a form of early-onset cerebellar ataxia that lacks molecular mechanisms and mouse models. We generated Snx14-deficient mouse models and observed severe motor deficits and cell-autonomous Purkinje cell degeneration. SNX14 deficiency disrupted microtubule organization and mitochondrial transport in axons by destabilizing the microtubule-severing enzyme spastin, which is implicated in dominant hereditary spastic paraplegia with cerebellar ataxia, and compromised axonal integrity and mitochondrial function. Axonal transport disruption and mitochondrial dysfunction further led to degeneration of high-energy-demanding Purkinje cells, which resulted in the pathogenesis of cerebellar ataxia. The antiepileptic drug valproate ameliorated motor deficits and cerebellar degeneration in Snx14-deficient mice via the restoration of mitochondrial transport and function in Purkinje cells. Our study revealed an unprecedented role for SNX14-dependent axonal transport in cerebellar ataxia, demonstrated the convergence of SNX14 and spastin in mitochondrial dysfunction, and suggests valproate as a potential therapeutic agent.We thank Tim Huang for helpful discussion, Wei Mo for sharing mouse lines, Li Zhong for sharing reagents, Aidong Han, Luming Yao, Caiming Wu, Mingxia Zhu, Qingfeng Liu, Lin Zhu, Shuo Zhang, Haiping Zheng, and Changchuan Xie for technical assistance, and Cui Li for providing bioinformatics software. We also thank Novogene Co., Ltd. and PTM Biolab Co., Ltd. for technical assistance in the transcriptomic and proteomic analyses, respectively. 厦门大学医学院许华曦、赵颖俊、张云武、杜丹教授在研究过程中给予大力帮助和支持。本研究工作得到国家重点研发计划项目、国家自然科学基金、福建省自然科学基金、厦门大学校长基金的资助和支持

关于“经济发展方式转变进程中的财税政策”的探讨(笔谈)

转变经济发展方式是当前中国的热门话题,而上海在城市发展中又肩负着率先转变的重要任务,在这一意义和背景下,2010年4月24日由上海金融学院学院主办、上海金融学院公共经济管理学院承办的“《中国城市财政发展报告2009/2010:促进‘两个中心’建设的上海城市财政》首发式暨‘经济发展方式转变进程中的财税政策’论坛“在我校举行。与会专家围绕经济发展方式转变进程中的财税政策的“趋势与目标“、“机遇和挑战“、“实施方略“和“地方实践“等四个专题进行研讨,各抒己见,智慧交锋。现将其真知灼见整理摘要与读者分享,以期待更多学者共同关注当前经济发展方式转变进程中的财税政策

车辆行星齿轮啮合刚度的建模及分析研究

齿轮副啮合刚度的周期性变化是行星齿轮传动系统产生振动的主要内部激励,深入研究齿轮的啮合刚度对解明齿轮系统的振动特征具有重要意义。采用能量法、有限元法和矩形波法分别建立了行星齿轮啮合刚度激励模型,并采用这3种模型分别求解了太阳轮、行星轮以及行星轮齿圈综合啮合刚度,对比了这3种模型求解啮合刚度的优劣。结果表明,3种刚度激励下的复合行星排各个构件的振动加速度幅值相差很小,且有限元法计算得到的振动加速度幅值稍大于解析法计算得到的振动加速度幅值,矩形波法计算得到的加速度幅值最小