Response of phytoplankton to nutrients addition in the upwelling regions of the Taiwan Strait

2006年6月在台湾海峡近岸上升流区通过表层水体营养盐添加的现场培养实验,研究该海区营养盐限制情况及其浮游植物水华产生的主要影响因素。对营养盐,叶绿素a浓度和浮游植物细胞丰度进行了测定,结果表明,实验中不存在明显的硅限制;氮磷营养盐均存在明显的限制,且氮限制情况更为严重。营养盐添加后,冰河拟星杆藻(Asterionellopsis glacialis)等硅藻迅速生长成为优势藻种,其对氮磷的利用机制有所不同。对氮营养盐采取吸收后迅速同化利用,相较于硝酸盐的补充,氨氮补充条件下优势硅藻更易迅速生长并迅速死亡;对磷营养盐的利用则由于体内磷库的存在,采用迅速吸收后贮存在体内慢慢消耗的利用机制。氮营养盐的补充是上升流期间浮游植物水华产生的主要因素。 【英文摘要】 In situ incubation experiments of nutrients addition to surface water from the upwelling region in the Taiwan Strait were conducted to investigate nutrient limitation of this area and the main factors that caused the phytoplankton bloom in June,2006.Variation of nutrients,Chl-a concentration and phytoplankton species density were analyzed.The results showed no clear limitation by silicon,however clear nitrogen and phosphate limitations were found,and nitrogen limitation was more serious than phosphate limit...国家自然科学重点基金资助项目(40331004)~

加强党的建设和优化自主创新环境的三个结合点

2006年在全国科学技术大会上,我国首次向世界提出建设创新型国家的伟大构想。党的十七大更明确地提出,提高自主创新能力,建设创新型国家;并强调这是国家发展战略的核心和提高综合国力的关键。如今,自主创新在我国国家战略体系中的基础地位得到确立,厦门市也出台了以自主创

Robust recursive algorithm for real-time co-correction model

利用遥测系统实时监测水情资料,由于遥测系统自身的原因以及水文要素测量的具体要求,数据常常携带异常误差.采用有异常误差的实测流量资料对实时校正模型进行参数辨识,要求算法既能抵御异常误差的影响,又具有较强的实时跟踪能力,以适应实时洪水预报的要求.在递推最小二乘算法的基础上,引入抗差理论,削弱异常值对参数估计的影响;引入遗忘因子,实时跟踪模型时变参数的变化.计算实例表明,带有遗忘因子的抗差递推最小二乘算法对异常误差不敏感,又具有较强的实时跟踪能力.Data observed by telemetric system often carries outliers resulting from instrument malfunctioning, false signal acquisition because of signal leak, collision and disturbance during signal transmission, and special measuring demand of hydrologic variable, in addition to unavoidable random errors. When the parameters of real-time co-correction model are estimated by the abnormal data, the algorithm must not only be able to resist the effect of the outliers, but also have ability for real-time tracing of the changes of parameters. In this paper, a robust recursive least-squares algorithm with a forgetting factor is produced based on the recursive least-squares algorithm. And an example is given to demonstrate that the algorithm is insensitive to the outliers and adapts to the time-varying parameter estimation.国家自然科学基金项目(40701178)资

Urban Planning and Sustainable Development

城市可持续发展是人类全面实施可持续发展战略的一个重要方面 ,它有其特定的内涵。城市规划是实施城市可持续发展战略的有效工具 ,在城市规划中引入可持续发展理论是引导城市可持续发展的重要一环。以可持续发展为原则的城市规划应突出其未来导向性、环境导向性、社会导向性的特点 ,文章就其含义及实现途径进行了分析和探讨。Urban sustainable development is an important part of sustainable development strategy. The urban planning is an effective means to put into effect sustainable development strategy in city. It is also an important link to guide urban sustainable development when sustainable development theory was used in the urban planning. According to sustainable development principle, the urban planning should have characteristics of tendency towards future, towards eco-environmental protection and towards community.加拿大国际发展署 (CIDA)支持;; 中、加、越三方合作开展的公众基础的保护与管理项目资

Studies on strategic environmental assessment for sustainable development in coastal zone.

战略环境评价(SEA)就是对政策、计划/规划及其各种替代方案的环境影响进行规范的、系统的、综合的分析和评价过程.以海岸带可持续发展为目标的SEA应遵循与战略决策过程紧密结合、综合、多元评价标准及公众参与4个基本原则进行厦门岛东部海岸发展规划的战略环境评价案例研究.：The strategic environmental assessment (SEA) is discussed and proved as an effective tool to realize the sustainable development in coastal zone in aspects of complex natural ecosystem, multiple human activities and disadvantages of project EIA in coastal zone. Four basic principles should be followed for developing the SEA in coastal zone, including close integration with decision-making, comprehension, multiple assessment criterion and public participation. These should be applied for assessing the planning of east coastal zone of Xiamen.加拿大国际发展署资助项目!(#UPCD Tier1 Program O1843-S53305

中国上市公司的负债是否发挥控制作用

本文以陷入财务困境的ST公司为样本,检验当公司陷入财务困境的情况下,负债控制机制是否对公司高层管理人员起到监督作用。检验结果表明,当ST公司陷入财务困境时,高层管理人员变更概率与公司负债比率之间不存在显著的正相关关系;负债比率高的ST公司高层管理人员变动的频率与负债比率低的ST公司高层管理人员变动的频率之间没有显著的差异;高层管理人员在离任时所遭受的个人财富损失不会因为公司负债水平的高低不同而出现显著的差别。综合而言,我国上市公司负债机制没有发挥相应的控制作用

Preliminary study on persistent organic pollutants (POPs)——PCBs in multi-phase matrices in Minjiang River Estuary

对闽江口水、间隙水与沉积物中的 2 1种多氯联苯的进行调查研究 ,结果表明 ,闽江口水中多氯联苯的含量范围是0 2 0— 2 4 7μg L ,间隙水中的含量为 3 19— 10 86 μg L ,沉积物 (干重 ) :15 13— 5 7 93μg kg ;与其他河口、海域相比 ,闽江口的多氯联苯污染水平相对较为严重 ;间隙水的污染物浓度普遍要比其上覆水的浓度要高 ,而沉积物中的浓度比间隙水、表层水要高 .水体中的多氯联苯主要部分为含 3— 6氯多氯联苯 ,多氯联苯的主要组分间的正相关性表明其具有相似、稳定的来源特征并且在环境中行为相关 ;对该河口的污染水平进行了初步的评价 ,其水质多氯联苯超过USEPA的标准 ,沉积物方面也部分超过参考评价标准The contents of 21 PCBs in water, porewater and surface sediments from Minjiang River Estuary were analyzed by GC ECD, and confirmed by GC MSD. The range of PCBs was 0 204—2 47?μg/L at water, 3 19—10 85?μg/L at porewater, and 15 13—57 93?μg/kg at sediments. Compared with the results of other estuaries and gulfs, it showed that the pollution of PCBs was some seriouis. The concentration difference in surface water, middle water, bottom water, porewater and sediments, due to the higher affinity of these hydrophobic compound for sedimentary phase than to water and a potential flux of pollutants from sediments to overlying water. The three to six chlorine PCBs were predominate in all water, poerwater and sediment samples. At the same time, it was found that the positive relationsip among the PCBs congeners (PCB52, PCB28 and PCB101) , which indicated that the pollulants came from a same and stable source, and the behaviors of the pollutants were related.海洋环境科学教育部重点实验室开放基金;; 教育部 1998年重点基金联合资

Watershed Level Risk Assessment of Nitrogen Discharge Using Probabilistic Risk Assessment Tools

采用故障树及概率分析方法,对九龙江流域氮的流失风险进行定性与定量评价.通过建立故障树定性分析了九龙江流域氮流失的主要风险来源.结果表明,氮流失风险大小主要与肥料施用、畜禽养殖废物的处置及农田耕作有关.在GIS技术支持下,通过土地利用、土壤等数据的计算,结合田间调查结果与专家意见,确定故障树基本故障事件概率,继而对氮流失风险进行定量评价.最佳管理措施模拟评价结果表明,降低施肥水平,在养殖场周边建立植被过滤带,增加河岸林截留入河沉积物等措施可以有效降低氮流失风险,在九龙江流域可以考虑优先实施. 【英文摘要】 Probabilistic risk assessment(PRA) for the discharge of excess nitrogen was conducted for Jiulong River watershed,an agricultural watershed in Southeast China.Using fault tree analysis,the probability of occurrence for excessive nitrogen discharge to the river during a runoff event was qualitatively evaluated.It was showed that the risk of excess nitrogen discharge was mainly related to crop and livestock practices in the watershed.Under the support of GIS,land use,soil type,management practices and expert ...福建省“十五”重大科技攻关计划项目(2002H009

流域用水系统协调发展分析

[摘要]：采用复合系统和协调发展理论与方法, 提出同步协调方程, 构建了流域各用水子系统间的协调发展评价方法, 并 将其运用于福建九龙江流域。结果表明: 九龙江流域在过去5年中, 用水系统协调发展程度较高, 同时存在波动。国家自然科学基金资助项目( 40701178

Incentive Mechanism of Community Participation in Management of Eco-tourism Resource-A Case Study on Eco-tourism in the East Coastal Region of Xiamen Island.

以厦门岛东海岸区 (黄厝 )生态旅游开发为例 ,提出在生态资源开发、管理过程中 ,实现社区公众有效参与、社区居民的生活水平得到提高的同时 ,达到生态保护目的的保障机制———生态旅游股份合作制。进而就厦门岛东海岸区生态旅游股份合作制运行框架进行了探讨。With the development of eco-tourism along the east coastal region of Xiamen Island as a case for study, a cooperative shares system is put forward for development of eco-tourism as a mechanism to guarantee effective community participation,to improve the living standard of the local residents and to protect the ecology in the processes of exploiting and managing the ecological resources.On such a basis,exploration is made on an operational framework of the cooperative shares system for development of eco-tourism in the east coastal region of Xiamen Island.加拿大国际发展署 (CIDA)资助 ;; 中、加、越 3国 7高校合作开展的CBCM项目(#UPCDTier1ProgramO1843-S5 330 5 )资