地面总辐射的异常减少对气候影响的数值试验

在与实际台风场近似一致的环境流场条件下，应用柱会标中的正压无辐散模式，讨论了台风中扰动的稳定性问题。研究表明，台风暖心结构的台风外围适当强度的冷空气活动有利限台风中扰动发展，且台风愈强，台风中扰动愈易发展。     

大洋多金属结核中铁锰质矿物拉曼光谱特征初探

拉曼光谱是一种快速无损的分析手段,它既可观察样品的显微结构构造,也可分析样品的成分和结构。为了丰富多金属结核的岩石矿物学特征,文章对西太平洋某海山区的多金属结核样品进行了X射线粉末衍射分析和拉曼光谱分析。X射线分析结果显示该区域样品主要含有水羟锰矿、钡镁锰矿、斜长石、钙十字沸石和石英,显微构造主要有纹层状构造、柱状构造、树枝状构造、充填构造等。通过分析对比潮湿样品和烘干样品铁锰质矿物的拉曼特征谱峰,得出结核中水羟锰矿的特征谱峰位于490 cm~(-1)、570 cm~(-1)和626 cm~(-1)附近,钡镁锰矿的特征谱峰则位于640 cm~(-1)附近,与陆地上对应矿物的特征拉曼谱峰不同。结核中的钡镁锰矿结构不稳定,经过风干或者抛磨后部分产生相变,不同显微结构中,相变情况不同。经与RRUFF数据库比对,识别出钙十字沸石、斜长石等自形晶,多分布于结核最内层,往结核外层总体减少。矿物微晶多见铁锰质矿物微晶和钙十字沸石微晶,铁锰质矿物绕其向外生长。     

三维实景地图生产与应用

实景地图近年来发展迅速,在日常生活中应用广泛,如旅游景点、宾馆、银行、政府服务中心等的空间位置查询、服务内容介绍等。实景地图的生产方法、生产流程有多种多样,产品质量参差不齐。目前,利用轻型无人机航空摄影系统实现三维全景地图生产,生产方式方便、高效且质量较好。该文介绍了生产三维实景地图的无人机系统及三维实景地图生产方法与过程,通过采用无人机系统实景地图的生产实例,讲述了实景地图应用现状、发展前景及存在的问题。     

Carbon and Noble Gas Isotopes in the Tengchong Volcanic Geothermal Area, Yunnan, Southwestern China

Carbon and noble gas isotope analyses are reported for bubbling gas samples from the Tengchong volcanic geothermal area near the Indo-Eurasian suture zone. All samples contain a resolvable component of mantle-derived 3He. Occurrence of mantle-derived 3He coincides with surface volcanism. However, 3He occurs over a larger geographic areathan do surface volcanics. δ13C values for CO2 and CH4 vary from -33.4‰ to 1.6 ‰ and from -52.8‰ to -2.8‰, respectively. He and C isotope systematics indicate that CO2 and CH4 in the CO2-rich gases originated predominantly from magmatic component mixed with crustal CO2 produced from carbonate. However, breakdown of organic matter and near-surface processes accounts for the CH4 and CO2 in N2-rich gases. 3He/4He ratio distribution pattern suggests that mantle-derived He and heat sources of high-temperature system in central Tengchong originate from a hidden magma reservoir at subsurface. CO2-rich gases with the highest 3He/4He ratio (5.2 Ra) may be representative of the     

文昌鱼精子发生的核孔复合体冷冻蚀刻电镜观察

1994-1996年每年3月、7月在厦门同安琼头海域采集雄性文昌鱼,采用冷冻蚀刻的常规技术,研究文昌鱼精子发生核孔复合体的变化规律。结果表明,在核孔复合体结构中很可能存在着作为运输物质的中央颗粒。各种生殖细胞中的核孔复合体的大小和密度不同,平均值约为:精原细胞（60±1.20）nm,（2.9±0.04）孔／μm2;初级精母细胞（76±1.80）nm,（4.8±0.05）孔／μm2;次级精母细胞（72±1.30）nm,（4.6±0.03）孔／μm2;精细胞（97±1.40）nm,（5.4±0.06）孔／μm2。这与细胞的生理功能有关。核孔复合体的分布具有明显的极性特点,主要集中在靠初级精母细胞的高尔基区一侧和靠精细胞的前项体一侧的核膜上,表明了细胞核局部的功能差异。     

2010年西北太平洋与南海热带气旋活动异常的成因分析

利用中国气象局热带气旋（TC）资料、NCEP/NCAR 再分析资料和美国 NOAA 向外长波辐射（OLR）等资料,分析了2010年西北太平洋（WNP）及南海（SCS）热带气旋活动异常的可能成因,讨论了同期大气环流配置和海温外强迫对TC生成和登陆的动力和热力条件的影响。结果表明,2010年生成TC频数明显偏少,生成源地显著偏西,而登陆TC频数与常年持平。导致7～10月TC频数明显偏少的大尺度环境场特征为：副热带高压较常年异常偏强、西伸脊点偏西,季风槽位置异常偏西,弱垂直风切变带位置也较常年偏西且范围偏小,南亚高压异常偏强,贝加尔湖附近对流层低高层均为反气旋距平环流,这些关键环流因子的特征和配置都不利于 TC 在WNP的东部生成。影响TC活动的外强迫场特征为：2010年热带太平洋经历了El Ni?o事件于春末夏初消亡、La Ni?a事件于7月形成的转换;7～10月,WNP海表温度维持正距平,140°E以东为负距平且对流活动受到抑制;暖池次表层海温异常偏暖,对应上空850 hPa为东风距平,有利于季风槽偏西和TC在WNP的西北侧海域生成。WNP海表温度和暖池次表层海温的特征是2010年TC生成频数偏少、生成源地异常偏西的重要外强迫信号。有利于7～10月热带气旋西行和登陆的500 hPa风场特征为：北太平洋为反气旋环流距平,其南侧为东风异常,该东风异常南缘可到25°N,并向西扩展至中国大陆地区;南海和西北太平洋地区15°N以南的低纬也为东风异常;在这样的风场分布型下,TC容易受偏东气流引导西行并登陆我国沿海地区。这是2010年生成TC偏少但登陆TC并不少的重要环流条件。     

Early J2 basalts in SE China: Incipience of large-scale late Mesozoic magmatism

Magmatism in SE China was dormant during 204–180 Ma, but was reactivated in 180–170 Ma (early J₂), and then became more and more intensive towards the end of early Cretaceous. The small-scale early J₂ magmatism is the incipience to long-term and large-scale magmatism in this region. A near east-west (EW) trend volcanic belt was distributed across south Hunan, south Jiangxi and southwest Fujian was formed during early J₂ time. Along this belt from the inland toward the coast, the lithology of basalts changes from alkali into tholeiite, and the amount of erupted volcanic rocks and the proportions of rhyolites coexisting with the basalts increase. On the basis of geochemical characteristics of these basalts, we infer that the melting degree of source rocks and the extent of fractional crystallization and crustal contamination all increased whereas the depth of mantle source decreased from the inland to the coast, which led to the variations of geological characteristics of the volcanic belt. In early J₂, the western spreading Pacific plate began to subduct underneath SE China continental block, reactivating near EW trend deep fault that was originally formed during the Indosinian event. The stress of the western spreading Pacific plate and the extent of asthenosphere upwelling increased from the inland to the coast, which is consistent with the generation and evolution of early J₂ basalts.     

电子文件归档在人事档案信息化管理中的应用

1信息技术在人事档案管理中的作用人事档案是记录个人从事各种社会活动的文件,是单位人事部门对个人管理的重要凭证和开展各种工作的基础,对考察和识别干部、选拔优秀人才,加强单位党政管理具有重大作用。在档案信息检索系统中采用计算机网络通信技术,     

基于投影变换的线阵旋转扫描相机标定方法

针对线阵旋转扫描相机标定数据难以获取及模型解算不稳定的问题,提出了一种基于投影变换的线阵旋转扫描相机标定方法。首先构建了一种新的线阵旋转扫描相机成像模型,该模型可以根据相机旋转平台参数、线阵旋转扫描相机成像平面与其切平面的位置关系将旋转扫描图像投影为框幅式图像;然后根据构建出的成像模型,采用直接线性变换法和非线性优化方法进行相机标定和参数优化。试验结果表明,此方法简单易行,具有较高的精度。     

中国九龙江河口营养盐基准值研究

One of the key concerns in estuarine and coastal environments is eutrophication, which is known to be closely connected to nutrient enrichment. To control and improve surface water quality, nutrient criteria are recommended in order to provide reference conditions for the environment. However, the current datasets of nutrient criteria in China are either designed for surface water or sea water, and as such these are not suitable for assessing estuarine water quality, especially given the unique ecosystem and dynamic properties of estuaries. To address this issue in current estuarine water management, nutrient criteria have been developed for a local estuary in the southeast of China. Segmentation of the Jiulong River Estuary, China was firstly analysed through field investigations carried out during 2013–2014, which resulted in the delineation of three segments characterized by their distinct properties in relation to salinity, hydrology, ecosystems, etc. Historical records from 1997 to 2014 were then analysed using statistical modelling to develop candidate nutrient criteria for the estuary.This stage of the analysis was undertaken in combination with the study of nutrient status records from the 1980s,which were used to establish a baseline reference condition. The recommended criteria values of dissolved inorganic nitrogen(DIN) in Segments Ⅰ, Ⅱ and Ⅲ of the Jiulong River Estuary are 64, 21 and 14 μmol/L,respectively, and the corresponding values for soluble reactive phosphorus(SRP) are 0.89, 0.76 and 0.89 μmol/L,respectively. It should be emphasised that these values are site-dependent, and that different results may be achieved at other locations depending on the physical and biogeochemical characteristics of an estuary, or even a single site within a catchment. It is hoped that by demonstrating a possible methodological approach and methods of nutrient criteria derivation in the Jiulong River Estuary, the current study will offer researchers some fundamental basis from which to begin to develop more complete nutrient criteria indices for the study of nutrient conditions in other estuaries throughout China.