Mechanism investigation of neutron absorption materials (Tb2TiO5,Dy2TiO5and Fe-Dy2O3)prepared by ball milling and sintering

核反应堆的功率调节是利用控制棒中的中子吸收材料进行的，以此来控制反应性。用于核电堆芯内的灰控制棒是用来代替通过调节硼浓度进行反应性控制。Tb2TiO5-Dy2TiO5和Fe-Tb2O3-Dy2O3材料被认为是灰控制棒用中子吸收体材料的优良候选材料。采用XRD、SEM、TEM和DSC等观察、分析与表征了球磨粉末混合物、退火粉末混合物和通过高能球磨和烧结工艺合成的Tb2TiO5烧结体的微观组织结构。同时对粉末混合物在球磨和退火过程中的物相演变机制进行了研究。测试了Tb2TiO5烧结块体的显微硬度、热膨胀系数和热扩散系数。 Tb4O7-17.605%TiO2混合粉末在500rpm下球磨96h后，T...Neutron-absorption materials are unsed to regulate the reactivity of nuclear reactor by absorbing neutrons. Gray control rodsare designed toachieve load following capability withoutsubstantial use of soluble boron. Tb2TiO5-Dy2TiO5 and Fe-Tb2O3-Dy2O3 are considered as excellent candidate materials used in gray control rods.Microstructures of ball-milling powders, annealed powders and Tb2TiO5 bulkss...学位：工程硕士院系专业：能源学院_工程硕士(材料工程)学号：3242014115224

女子特殊生理时期的常见舌象探讨

女子在经期、妊娠、产后、哺乳、围绝经期等特殊生理时期,根据不同时期的需求,气血阴阳及脏腑功能随之变化,呈现出来的舌象也与\"淡红舌,薄白苔\"的正常舌象有所不同。文章根据这些特殊生理时期的体质特点,对其常见舌象做一探讨,以期对临床有所裨益。厦门大学大学生创新创业训练计划项目(No.103842017229)~

Control Divisions of Agricultural Non-point Source Pollution at Watershed Scale Based on GIS and Models

采用GIS技术和USLE,SCS-CN,污染物流失经验模型及AnnAGNPS机理模型相结合,对农业集约化程度较高的南方中等尺度流域进行农业非点源污染控制区划.结果表明:利用GIS和经验模型回答了流域农业非点源污染氮磷来源与贡献,标识了农业非点源污染氮磷等污染物的关键源区,发挥了经验模型所需模型参数少、研究尺度较大、效率较高的优点,通过GIS的栅格数据空间分析功能,实现了流域非点源污染的分布式模拟,识别了NPS的关键源区.借助AnnAGNPS机理模型,在模型得以校验的前提下,模拟了非点源污染管理措施方案.以模型和GIS的定量结果为依据,对九龙江流域农业非点源污染控制进行了区划,共划分了水土流失控制区、生猪养殖+水土流失控制区、化肥施用+生猪养殖控制区、水土流失+化肥施用控制区及化肥施用+水土流失控制区5类控制单元. 【英文摘要】 GIS technology and USLE,SCS-CN,nutrient losses empirical equations and AnnAGNPS model were coupled to carry on control divisions of NPS in a mediumsized watershed,located in southeast of China,with relative strong intensive agricultural activities.The results show that the integration of GIS with empirical models can help analyze major sources and contributors of NPS,and identify the critical source areas of NPS.This can not only develop the advantages of empirical equations,e.g.requiring less model paramet...福建省科技重大攻关项目(2002H009

Patterns of Agricultural Sustainable Development in Haiyuan County

海原位于宁夏南部山区,农业在海原县国民经济中占有举足轻重的地位。本文分析了海原县农业生产的过去、现状及存在的问题,剖析了海原县光、温、水、土等农业资源,并以可持续发展为理论基础,对海原今后农业发展模式进行了初步探讨,提出了减少耕地面积,退耕还林还草,大力发展畜牧业,充分利用雨水资源,提高雨水集蓄节灌综合技术,建立集水型生态农业,发展精细农业的可持续发展对策。Haiyuan is located in southern of the Ningxia Hui Autonomous Region.Agriculture plays a key role on the local economy.In this paper,the pass & present agricultural conditions and existing agriculture problems in Haiyuan were presented.Local agricultural resources such as light,temperature,water and soils were analyzed.In addition,based upon the theory of sustainable development,discussions toward the patterns of agricultural sustainable development in Haiyuan County were carried on.The authors' opinions included as follows:①decreasing the cropland,synchronously increasing forestry & grasses and adequately developing stock raising;②making fully use of rainwater resource,improving the integrated technologies of rainwater' collection,storage,saving and irrigations;③establishing local ecological agriculture;④developing local precision agriculture

Comparative study of two models to simulate diffuse nitrogen and phosphorus pollution in a medium-sized watershed, southeast China

The aim of this study was to compare and assess two models to calculate diffuse nitrogen and phosphorus emissions in a selected watershed. The GIS-based empirical model and the physically-based AnnAGNPS model were evaluated for comparative purposes. The methodologies were applied for the Jiulong River watershed, covering 14,700 km(2) located in southeast China, with intensive agricultural activities. The calculated loadings by AnnAGNPS model was checked by the measured values at the watershed outlet, whereas the calculated nitrogen and phosphorus emission by GIS-based empirical model spatially provided the potential values in terms of sub-watersheds, districts/counties, and land use type. Both models gave similar levels of diffuse total nitrogen emissions, which also fit well with previous estimates made in the Jiulong River watershed. Comparatively, the GIS-based empirical model gave sound results of source apportionment of non-point source pollution (NPS) froth the available input data and critical source areas identification of diffuse nitrogen and phosphorus pollution. The AnnAGNPS model predicted reasonable nitrogen loading at the watershed outlet and simulated well for NPS management alternatives under changing land use conditions. The study indicated that the GIS-based empirical model has its advantage in extensive studies as a decisions support tool for preliminary design since it is easily applied to large watersheds with fewer data requirements, while AnnAGNPS has its advantage in detailed emission assessment and scenario development. (C) 2009 Elsevier Ltd. All rights reserved

福建省药理学学科发展报告

福建省药理学学科的发展对于提高福建人民群众合理用药水平,促进医药企业新药研发,以及推动海西生物医药产业的发展,具有非常重要的意义。福建省药理学科在学科建设、人才培养和平台建设方面已取得一定成效,在药物靶点与先导化合物研究、中药与天然药物研究、小分子药物研究、基因药物研究和海洋药物研究等领域取得了初步成果。福建省药理学科将继续依托福建省药理学会平台,促进药理学术交流,加强药理学分支学科与专业委员会建设,充分发挥学科优势,服务福建经济建设与社会发展

Surface Water Hydrology Simulation of Jiulong River Basin Based on GIS and DEM

　　运用 GIS软件 ARC/INFO、ArcView,以九龙江流域为例,探讨了数字高程模型(DEM)的处理及其水文模拟分析。对九龙江流域分幅数字高程模型(DEM)进行图幅拼接、网格重分及切割等处理分析,生成九龙江流域数字高程模型。基于DEM和GIS进行流域的水文模拟分析,包括洼地填充、水流方向计算、水流累积量计算、水网提取,最后进行了九龙江全流域及子流域界线的划分,生成了数字流域。The treatment and hydrology simulation analysis of digital elevation model (DEM) are discussed using ARC/INFO and ArcView of GIS software with an example of the Jiulong River Basin. The digital elevation model of the Jiulong River Basin is generated through map mosaic, grid re-division, and separation of all the DEM maps of the Jiulong River Basin. The hydrological simulation is conducted based on DEM and GIS, for the major processes of lowland water infilling, calculation of water flow direction and water flow accumulation, and water network layout. Finally the digital basin is generated through separations of the whole basin and the sub-basins of the Jiulong Basin.福建省重大科技项目(编号:2002H009)

Characteristics of nitrogen and phosphorus losses with surface runoff in typical sub-watersheds of Jiulong River watershed.

选取九龙江流域5个典型汇水区,通过流域主要雨季天然降雨径流过程监测,对所获得的氮磷营养盐的监测数据进行归纳与分析,着重探讨了暴雨事件下径流氮磷流失及其形态的变化规律。结果表明:暴雨事件下农业汇水区地表径流氮输出以水溶态为主,磷以泥沙结合态为主,天然林地为主的汇水区则相反,前者以泥沙结合态为主,后者以水溶态为主;5个汇水区暴雨事件中总氮最高浓度值为日常采样浓度值的2.9～11.3倍,暴雨事件中总磷最高浓度值为日常采样浓度值的2.9～20.5倍;氮磷输出量均值的差异反映氮磷输出量大小受土壤质地、施肥量、土壤氮磷含量、土壤保水保肥性能等因素的综合影响。整个径流过程中水量和氮磷浓度随时间变化幅度较大,且2者变化呈大体相同的趋势。氮磷及其各形态的浓度多数在相同时间内达到峰值。泥沙结合态氮、水溶态磷变化幅度较小,水溶态氮和泥沙结合态磷浓度变化幅度较大。统计各汇水区雨量不同的降雨事件下氮磷流失负荷表明,特大暴雨对汇水区氮磷负荷的贡献非常显著。Five typicl sub-watersheds in the Jiulong River watershed were chosen for monitoring nitrogen and phosphorus losses.Results of the monitoring and analysis show that in the event of storms in agriculture-based watersheds,the N loss with the runoff is dominated with soluble N and the P loss with P combined with silt whereas in natural-forest-based ones,the situation is completely different.Under storms,the maximum total N concentration in the runoff is 2.9-11.3 times as much as that in the runoff normal and the maximum total P concentration 2.9-20.5 times as much.Throughout the entire course of runoff,water volume and N & P concentration vary sharply with the time,showing a similar trend.The concentrations of total N & P and their various forms come up to their respective peaks almost at the same time.The contents of silt N and soluble P fluctated within a limited range whereas those of soluble N and silt P do within a large one.福建省重大科技项目(2002H009

血液透析室护士身心健康状况与应对方式的关系研究

目的通过对血液透析室护士身心健康状况与应对方式的调查研究,促进护士心理行为良性发展,提高其身心健康水平。方法采用一般资料调查表、康奈尔健康问卷、简易应对方式量表对269名血液透析室护士进行问卷调查。结果血液透析室护士最常见的躯体健康问题是眼和耳(24.67%),其次是消化系统(18.26%),最常见的心理健康问题是不适应(19.42%),身心健康阳性率为15.61%,心理健康阳性率为7.43%。年龄越大、工作年限越长,护士的心理健康水平越高,消极应对得分明显高于常模,消极应对得分与身心健康状况得分呈正相关(P<0.01)。结论血液透析室护士身心健康状况不容乐观,既要提高工作能力也要注重心理调节能力的培养,促进护士形成积极的心理反应模式,尤其是年轻护士,应学会和运用积极的应对策略,保持良好的身心健康状况。厦门市科技计划项目(3502Z20144041