区域性海洋环境灾害信息网络服务系统总体设计

在总结分析区域海洋预报中心业务的基础上,从数据传输流程入口,进行业务系统总体建模,建立统一的海洋预报信息网络平台,实现高度集成的区域性海洋环境灾害信息网络服务系统的总体设计思路。采用XML Web Service技术体系为核心的平台技术,实现了前台应用系统和后台业务系统的松耦合连接,解决了系统建设中由于各种现存信息系统相互独立造成的信息系统过度扩张问题,以及在新的信息系统建设中,新老系统的继承和复用问题。     

Algorithm Design and Test of the Solar Guide Telescope

The Solar Guide Telescope (SGT), an important solar attitude sensor of the SST (Space Solar Telescope, a space solar observing instrument being developed in China), can accurately produce pointing error signals of the SST for attitude control at high speed. We analyze in detail the error algorithm of the heliocentric coordinates and the edge judging of solar images. The measuring accuracy of ±0.5 arcsec of the SGT is verified by experiments on the tracking of the Sun and by testing a sun simulator. Some factors causing the pointing errors are examined.     

Isolation and characteristics of one marine psychrotrophic cellulase-generating bacterium Ar/w/b/75°/10/5 from Chuckchi Sea,Arctic

Microorganisms living in polar zones play an important part as the potential source of organic activity materials with low temperature characteristics in the bio-technological applications. A psychrotrophic bacterium (strain Ar/w/b/75°/10/5) , producing cellulose at low temperatures during late-exponential and early-stationary phases of cell growth, was isolated from sea ice-covered surface water in Chuckchi Sea, Arctic. This bacterium, with rod cells, was Gram-negative, slightly halophilic. Colony growing on agar plate was in black. Optimum growth temperature was 15℃. No cell growth was observed at 351 or above. Optimum salt concentration for cell growth was between 2 and 3 % of sodium chloride in media. Maximal cellulase activity was detected at a temperature of 35℃ and pH8. Cellulase was irreversibly inactivated when incubated at 55℃ within 30 min. Enzyme can be kept stable at the temperature no higher than 25℃. Of special interest was that this bacterium produced various extracellular enzymes i     

A Correlation between Proton Events and Hα Flares and its Possible Interpretation

1 INTRoDUCTIONIt is well known that solar proton flares are maiuly correlated with strong, bright H. flares,in particular, with two ribbon flares. Ellison et al. (l961) were the first to draw attelltion tothe faCt that all cosndc-ray flares had the typical two-ribbon shape. Then, Svestka and Simon(1976) drew uP the "Catalog of Solar Particle Evellts, 195ty1969", and using this Catalog,Dodson and Hedeman could safely identify the flare sources for 50 proton events. Out of the 50idellti…     

1989年10月和1991年3月大同地震的活动断裂

中国地震局地球物理研究所在 1 989年 1 0月 5.8级和 1 991年 3月 5.5级大同地震之后使用由数字地震仪组成的小孔径流动台网对其余震进行了流动观测。通过利用多道地震数据分析软件正确地确定震相 ,修改地壳速度模型等方法 ,高精度地确定了部分余震的震源位置。两次大同地震部分余震的震中分布表明 ,大同地震的主干断裂是北北东走向的断裂 ,同时伴随北西走向的分支断裂的活动。盆地的速度结构可以以双层速度结构模拟 ,其上层为 P波速度为3.1 km/s的沉积层 ,符合大同盆地为火山喷发堆积物的实际情况。     

白令海表层沉积物中硅质生物的变化及其环境控制因素

中国首次北极科学考察在白令海采取了12个表层沉积物样品, 其中对硅质生物和陆源碎屑的详细研究发现, 它们主要由硅藻、放射虫和海绵骨针组成.其中, 硅藻在样品中的丰度均占绝对优势, 高出放射虫和海绵骨针一个数量级.它们与环境控制因素关系的分析表明, 硅藻、放射虫和海绵骨针丰度的高低及其保存程度与深度、温度、盐度和受大规模季节性气候变化控制的表层海水的高营养和高生产力, 以及陆源物质输入的变化密切相关.这一研究结果对白令海第四纪的古气候与古海洋学研究具有十分重要的意义.      

一种基于小波变换的波达方向估计方法

通过利用最大重叠离散小波变换对信号进行预处理,以减小噪声的功率,从而提高信噪比,使传统的波达估计方法在低信噪比情况下也能正常使用;所用的小波变换方法不要求数据长度为2的整数次方,且具有移位不变性,使得该方法的实用性更强;最后,通过数字仿真试验验证该方法的有效性。     

An Examination of ENSO’s Effect on the Monthly and Seasonal Climate of Hong Kong from a Statistical Perspective

This study aims to examine the effect of El Nino and La Nina on the monthly and seasonal climate of Hong Kong against the ENSO-neutral situation from a statistical perspective. Monthly and seasonal temperature and rainfall of Hong Kong and monthly number of tropical cyclones (TCs) coming within 500 km of the city over the 59-yr (1950-2008) period are examined under three ENSO situations, namely El Nino, La Nina, and ENSO-neutral. It is found that, compared with the ENSO-neutral situation, El Nino tends...     

WRF耦合4个陆面过程对“6.19”暴雨过程的模拟研究

利用WRF模式与4个陆面过程的耦合,对2010年6月19—20日的暴雨过程进行了数值模拟,并分析陆面过程对暴雨强度和范围的敏感性。结果显示：WRF耦合4个陆面过程模拟的雨带和实况分布一致,均为东西向的雨带形状,且均预报出与实况资料相似的强降水中心。在无陆面方案情况下,强降水中心的位置、范围、强度等都发生明显变化。另外地表径流预报量和降水趋势表现一致,由于土壤含水量趋于饱和,多余的降水分配给地表径流,这种剧增的地表径流也是洪水暴涨、水位上升的重要原因。在较湿的土壤状况下,由于净辐射增长,有利于产生厚度更小的边界层高度以及更大的地表向上潜热通量,这也是导致本次降水过程异常增幅的一个重要原因。     

Effects of sedimentary layer on earthquake source modeling from geodetic inversion

Ground deformation as observed with GPS or InSAR has been broadly inverted in constraining source parameter of earthquakes. However, for earthquakes occurring beneath sedimentary basins, the very slow sub-surface shear velocity (v S , down to 200 m/s) may cause substantial bias to earthquake source inversion if simple crustal models are used. For Bohai basin, Sichuan basin and rock-sites, we test effects of sub-surface shear velocity structure on ground deformation, and find that up to a factor of 2 overest...