140 research outputs found

    Interpretation of the 2015 guidelines on diagnosis and treatment of endogenous subclinical hyperthyroidism by the European Thyroid Association

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    亚临床甲状腺功能亢进症在临床中很常见,但对其危害及处理有很大的争议。欧洲甲状腺学会根据现有的临床证据,公布了内因性亚临床甲状腺功能亢进症诊治指南; 。指南强调,要确立持续性亚临床甲状腺功能亢进症的诊断,明确其病因,按照其进展为临床甲亢、发生不良心血管事件及骨质疏松风险进行危险分层,以指导临床; 处理。Endogenous subclinical hyperthyroidism (Endo SHyper) is a common form of; thyroid diseases. Currently controversy exists in the management of Endo; SHyper. Based on the existing clinical evidence, the European Thyroid; Association (ETA) published a guideline on diagnosis and treatment of; Endo SHyper in 2015. The guidelines recommend that clinicians establish; the diagnosis of persisted Endo SHyper, then clarify its etiology, and; guide treatment by the risk stratification according to the development; of overt hyperthyroidism, adverse cardiovascular events and; osteoporosis

    Investigation of the High EFFiciency Luminescence of RE(Er)and Oxygen (O) Double Implanted GaAs and Si

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    用光致发光谱(Pl)、傅里叶变换红外吸收话(fTIr)和X射线衍射谱(Xrd)等研究了稀土(Er)和氧(O)双离子注入gAAS和SI的发光特性和高效发光机理。Pl测量结果发现:(Er和O)双注入样品对比Er单注入样品的发光(Pl)强度(Er的1.54μM峰)显著增大,发光单色性等也有明显改善。测量并分析了该材料的fTIr和Xrd谱;对该材料的高效发光机制作了较深入地探讨和澄清。The RE(Er) and oxygen(O) double ion-implanted GaAs and Si are studied by using PL.FTIR and XRD.The PL measurement results show that the luminescent intensity (Er 1.54 μm peak) of (Er, O) double implanted samples is much stronger than that of single Er-implanted samples and the monochromaticity of luminescence is improved.The FTIR and XRD of the materials are measured and analyzed.The mechanism of the high eFFicienct luminescence of the materiaIs is investigated deeply.国家自然科学基金;南京大学团体微结构实验室资

    大学理念的分类、生成及运行

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    大学理念的分类、生成和运行是大学理念的基本问题。大学理念可分类为一般的大学理念和特殊的大学理念,前者体现共性,后者体现个性;大学理念生成实质上是国家、市场、大学、个人四方博弈的结果;大学理念运行需要依靠观念认同、制度建设、经验重构进行保障

    Estimation of underwater acoustic channels based on active taps and evolutionary programming

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    为了实现稀疏水声信道的快速高效估计,提出一种新的基于有效抽头的信道参数模型降低运算复杂性,并采用进化算法以最小二乘误差为适应度函数对信道响应中有效抽头的阶数、位置和权重同时进行进化操作寻优,避免了有色输入造成的相邻抽头耦合导致的性能下降。仿真实验结果表明:与传统LMS算法及基于有效抽头检测的稀疏信道估计方法相比,该算法在有色输入信号下具有更优越的估计性能和收敛速度,为稀疏水声信道处理提供了一类新方法。To estimate sparse underwater acoustic channels,a filter structure only containing posi-tions and values of active taps is proposed to reduce computational complexity compared with traditional transversal FIR filters.Consider the coupling effects of active and inactive taps indu-ced by colored input which leads to failure of detection guided algorithm,the order,as well as the positions and values of the active taps are evolved simultaneously with least squares error as fitness function.Simulation results demonstrate that an active taps and evolutionary method show better efficiency for sparse channel estimation in case of colored inputs.国家自然科学基金项目(No.D0602-40476018);; 福建省自然科学基金项目(No.2006J0142

    水资源资产负债表核算体系研究——基于自然资源资产离任审计视角

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    十三五规划中明确提出编制"水资源资产负债表"的要求。文章依据"环境—经济"水资源循环模型,将水资源资产与权益归属相结合,剖析资产存量变化背后的经济活动过程;重新定义水资源负债的内涵及核算内容,将水资源过度耗减与水质降级纳入水资源负债核算范畴;基于与财务会计核算的相通之处,提出水资源资产负债表的核算流程。最后,进一步探讨在会计实务中编制水资源资产负债表的困难和发展方向,为我国开展自然资源资产离任审计提供会计信息支持。国家社会科学基金面上项目“分权视阈下我国土壤重金属污染修复基金制度设计与运行机制研究”(18BJY085

    船舶减摇装置的发展现状与趋势

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    针对船舶在波浪中运动的不同自由度,从减摇机理出发梳理了减摇装置的发展脉络,指明其兴起及发展原因,在综述船舶单自由度减摇装置的基础上,对近年来出现的船舶多自由度减摇装置进行介绍,并阐述船舶减摇领域的关键技术,对今后船舶减摇装置的发展趋势进行预测。福建省海洋高新产业发展专项资金资助项目([2016]13号);;福建省科技计划资助项目(2016H6022

    Study on the Optimization of Traffic Coordination in Tianjin Dagusha Waterway

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    为保障天津港大沽沙航道通航安全畅通,对该航道通航环境和交通现状进行了研究,统计分析了大沽口港区和南疆南港区泊位及到港船舶情况,通过分析通航时间和通航密度,计算了航道实际通航能力,指出该航道交通组织优化的必要性.依据港口发展规划,对港区货物吞吐量及到港船舶数量进行了预测,在此基础上提出了大沽沙航道交通组织优化模式和安全保障措施及建议.In order to ensure safe navigation of the Tianjin Dagusha waterway the navigationalenvironment around the waterwayand the status quo of the traffic are studied in this paper.Analysis and statistics are carried out on the berths and vessels arriving in the ports of Dagukou and Nanjiangnan.Through analysis on passage times and traffic density,the actual traffic capacity is calculated and the optimization on traffic coordination.According to the port development plan and expectedvessel traffic situation,suggestions of traffic coordination optimization mode and safety measures are put forward for the safe navigation and traffic management of Dagusha waterway.The finding from this studyprovides reference for the relevant authorities in making decisions on safe and efficient navigation,as well astraffic management and so on.福建省自然科学基金资助项目(2015J01214

    基于互信息的四螺旋模型创新协同度研究

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    本文分析了&ldquo;政-产-研&rdquo;三螺旋模型的局限性和第四螺旋现有研究的不足之处,提出了以科技服务机构为第四螺旋构建&ldquo;政-产-研-服&rdquo;四螺旋模型的观点。随后,本文基于互信息和三螺旋算法设计了四螺旋创新协同度计量指标Tgias,并采用各主体科技论文产出数据作为其创新产出表征,利用Tgias指标量化测度了四螺旋各主体间的创新协同程度。量化分析结果表明,科技服务机构加入螺旋结构后全方位提升了政-产、政-研、产-研、政-产-研既有的协同度,反映出科技服务机构作为第四螺旋对原有三螺旋体系创新发展的催化和促进作用。对四螺旋模型的研究和应用有利于提高科技情报、技术转移等方面工作的协同创新效率。</p

    Investigation of the origin and evolution of groundwater in Yang-Dai River Plain by chlorine,oxygen 18 and deuterium

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    通过分析地表水和地下水中氯离子浓度和δd、δ18O值的空间分布特征,揭示了秦皇岛洋戴河平原地下水的形成演化规律.结果发现,洋戴河平原地表河水来源于中上游水库水和大气降水的混合,且河水沿程受到δd、δ18O值、氯离子浓度更低的支流或灌渠水补给,从而使δd、δ18O值、氯离子浓度呈现沿程逐渐降低的现象.山前丘陵区地下水主要接受大气降水的直接补给,洪积扇及山麓地带地下水受到了一定的蒸发作用影响,除了接受丘陵区地下水的侧向补给外,洋河附近地下水还受到洋河水库水的混合.研究区西部咸水带的地下水由上游地下水和大泥河地热咸水混合而成,地热咸水的混合比率约为13%,而东部咸水带的地下水由上游地下水、本地污水和地热咸水混合而成,地热咸水的混合比率不超过9%.在海水入侵区,地下水主要由本区地下淡水和海水(海水混合比率不超过10%)混合而成,并且受到了不同程度的地表水或农田灌溉水的补给,其中,浦河一带是地表水或灌溉水补给较为明显的地段.The aim of this paper is to reveal the origin and evolution of surface water and groundwater by analyzing the spatial distribution of chloride ion concentration and δD and δ18O values in surface water and groundwater in Yang-Dai River Plain.The Yang-Dai River originates from the mixing of water of reservoir and meteoric water,and river water is also from the recharge in the tributary and irrigation ditch which have much lower chloride ion concentration and δD and δ18O values.Therefore,chloride ion concentration and δD and δ18O values in river water decreases gradually from upstream to downstream.The groundwater in hilly area is primarily recharged by meteoric water,and the groundwater in pluvial fan and piedmont experiences evaporation partly.The groundwater in pluvial fan and piedmont is recharged not only laterally by upstream groundwater from mountainous and hilly area,but also by Yang River reservoir water.In the study area,the groundwater in the west part of salty water region is mixed between upstream groundwater and salty geothermal water originated from Danihe area,with a mixing radio of 13% salty geothermal water.In comparison,the groundwater in the east part of salty water region is mixed by upstream groundwater,sewage water and salty geothermal water,with a mixing radio of up to 9% salty geothermal water.In the seawater intrusion region,the groundwater was mainly constituted of local fresh groundwater and intrusive seawater with a mixing ratio of up to 10% seawater,and is also partly recharged by surface water and agricultural irrigation water which have higher contribution to the groundwater recharge in Pu River area.国家重点基础研究发展计划(973)项目(No.2010CB428805); 环保公益性行业科研专项经费项目(No.201309006)~
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