A numberical study of the influence of wave-current interaction during the storm surge process in the Taiwan Strait

海洋在台风的响应过程中，天文潮、风暴潮和波浪是同时存在且相互影响、相互作用的，特别在近岸区域，这种相互作用的效应更加明显。只有综合考虑这三者相互作用的效应，才能准确地模拟出台风过程的水动力情况和波浪情况，这对做好风暴潮和台风浪的数值研究、预报非常重要，对采取有效措施防范台风灾害具有指导意义；从学术价值方面，可为进一步研究近岸海域台风期间物质输运、生态响应等研究奠定动力机制的基础。本文选取台风灾害频发、受灾严重的台湾海峡、福建省沿海作为重点研究对象，利用改进的台湾海峡附加风场和基于卫星遥感风场的背景风场，构建了适合于台湾海峡、福建省沿海的台风模型，并驱动建立的二维台湾海峡及其邻近海域天文潮、风暴...The tide, storm surge and wind wave interact in different ways during the typhoon process. Especially in nearshore zone, the influence of wave-current interaction is much stronger. We can simulate the current and wave conditions accurately if the interactions among these three factors are taken into account. These works are not only important to improve the technology for prevention and mitigation...学位：理学硕士院系专业：海洋与环境学院海洋学系_物理海洋学学号：2242010115135

用于加氢合成对氯苯胺反应的催化剂、其制备方法及应用

本发明公开了一种用于加氢合成对氯苯胺反应的催化剂，其包括磁性核、包覆所述磁性核的微孔二氧化锆层，以及负载于所述微孔二氧化锆层的铂纳米颗粒。本发明提供的催化剂以磁性颗粒为核，可通过磁铁吸附分离，便于收集和重复利用，而通过将铂纳米颗粒负载到微孔二氧化锆层上，该微孔二氧化锆层作为载体可以有效提高活性组分分散度，促进铂的催化活性。同时，本发明还提供了所述催化剂的制备工艺，该制备工艺简单可控，产物结构和成分可调控，催化活性高，在应用于加氢合成对氯苯胺等反应中时，可以大幅提升反应的选择性和目标产物收率

The Pre-evaluation Model of Typhoon Disaster Losses on Fujian Province

基于2000—2009年对福建省造成灾害损失的22个台风数据,将台风分为气象型灾害和混合型灾害,利用数理统计的方法建立台风灾害直接经济损失预评估模型,在得到致灾因子和损失因子的多项式拟合关系基础上,进行了台风损失的悲观估计和乐观估计,并对台风灾害的影响等级进行了评估.研究结果显示该模型具有较高的拟合率,由误差分布和实际评估结果计算的模型的有效率均达到80%以上,能够较好地预评估台风可能造成的直接经济损失并能有效地分析台风灾害的趋势;灾害等级预报的准确性稍低于灾害经济损失预报的准确性,但总体属于同一水平.模型的建立可为防灾减灾提供科学依据,具有实际意义.Based on twenty-two typhoons data from 2000 to 2009 which caused great impact on Fujian Province,an assessment model of direct economic losses for typhoon disaster was established.The typhoon disaster was divided into two different types,one was meteorological typhoon and the other was mixed typhoon.The mathematical statistics method was applied to polynomial fitting for further calculation of the losses ranges.Meanwhile,the assessment of disaster grade was also included.The results show that the accuracies calculated distribution of error and actual result of the model are both above 80%,while the discrepancy between the two methods is less than one percent.So the model established can reasonably pre-evaluate the losses caused by typhoon disaster of different density and analyze the trend of typhoon disaster effectively.The consequence also shows that the pre-assessment results of disaster grading are in accordance with the results of direct economic losses,although the former accuracy is slightly lower than the latter.Therefore,this model can be applied in the actual pre-assessment of direct economic loss from typhoon disasters,which is based on the observation data as well as the economic data.The result could be given to the government as a reference and support decision-making for disaster recovery.福建省908专项(FJ908-01-01-ZH

Pt/WO_(3-x)纳米催化剂的制备及其性能研究

首先,采用水热法合成WO_(3-x)前驱体,再用浸渍法和热分解法制得Pt/WO_(3-x)纳米催化剂。利用XRD、TEM以及H2-TPR测试方法对其进行了表征分析。结果表明,Pt纳米颗粒在WO_(3-x)表面分散性好,并且Pt纳米颗粒与WO_(3-x)之间存在较强的相互作用。在对硝基苯酚加氢反应中,与Pt/Al_2O_3纳米催化剂相比,Pt/WO_(3-x)纳米催化剂在300℃焙烧后显示出优越的催化性能,这可能归因于金属与金属氧化物之间的强相互作用

Dynamic analysis on the spatial pattern of landscape of small watershed in loess hilly-gully region:A case study of Shanghuang test area in Guyuan

为黄土高原土地资源合理利用及区域可持续发展提供参考,以上黄试区为例,在地理信息系统支持下获得计算景观多样性的有关参数,选取斑块大小及数量、分维数、斑块伸长指数、多样性、优势度、均匀度和破碎度等指标,对黄土丘陵小流域10年来景观多样性动态变化进行分析。结果显示:1995—2004年,该试区总斑块数增加了6个,斑块变化明显的主要表现为:坡耕地及天然草地斑块分别减少19个和12个,人工草地斑块及梯田分别增加15个和9个;平均斑块面积及平均斑块周长分别下降了0.14hm2和185.36m2;梯田、天然草地、疏林地、园地及居民点用地分维数,都有不同程度的下降,而坡耕地、人工草地、灌木林地及未利用地景观的分维数有所上升,水浇地、川台地、乔木林地、水域景观分维数保持不变;上黄试区景观异质性特征表现为:均匀度指数下降5.86,景观破碎度指数上升0.002,人为干扰度增加1.95,景观类型多样性指数下降0.25,优势度指数上升0.25。目前,试区从耕地及草地为主的景观生态系统,转变为以林地和草地景观为主的高度异质化的景观生态系统,人类活动的干预,是驱动该试区景观空间格局变化的主要驱动因素

Distribution Characteristics of Suspended Sediment and Dynamic Analysis in the Xiamen Bay

利用2011年1月厦门湾3个观测站声学多普勒流速剖面仪(AdCP)回波强度数据与现场水样采集反演出了悬沙浓度,并估算了单宽输沙量.经统计分析表明,厦门湾冬季1月份整体悬沙浓度较小,西海域悬沙浓度大于东海域,近水面悬沙浓度小,由表层到底层逐渐递增;而在时序分布上,悬沙浓度变化与潮流密切相关,呈现出往复运移的趋势,并且大潮期间的悬沙浓度大于小潮期间的悬沙浓度.此外,厦门湾内单宽输沙量一般在半潮面时最大,而在湾外,单宽输沙量在接近平潮或停潮时达到最大,冬季净输沙量整体较小.The suspended sediment concentration(SSC) and the sediment transport rate in Xiamen Bay were calculated,based on the backscattered signals observed by the acoustic doppler current profilers(ADCP),which had been calibrated against in situ bottle samples of the suspended sediment in January 2011.The statistical analyses show that the SSC of Xiamen Bay is low in January,and the SSC in Xiamen Western Bay is larger than the SSC in Xiamen Eastern Bay.The retrieval results also show regular vertical variation,that the SSC increases from the surface layer to bottom layer.Moreover,by analysis of time series,the SSC variations in a tidal cycle also have close relation with tidal currents.In addition,the high concentrations of suspended sediment coincide with the stronger tidal currents due to the tidal dispersion and vertical mixing.Furthermore,the net sediment transport is low in winter and sediment transport rate reaches its maximum in a tidal cycle at half-tide level in the inner bay of Xiamen,while the maximum of sediment transport rate is at slack tide in the outer bay.福建省科技厅专项经费项目(2010Y0064); 厦门市海洋与渔业局专项经费项