坚守在客户身边的彩虹——记客户服务中心成立半周年

北京理正是勘察设计行业中唯一一家能提供全面信息化技术服务的大型软件企业,十几年来始终致力于为设计企业提供全方位服务,CAD辅助设计软件、设计院管理信息系统、协同设计软件这三大系列六十多种软件产品几乎覆盖了设计院信息化建设需求的方方面面.     

The eastward subtropical countercurrent on isopycnal surface in the western North Pacific

The classic Sverdrup theory suggests that the water movement in the central subtropical gyre of North Pa-cific be slowly westward or southwestward.In the late sixties of the20th century,the existence of a peculiar eastward narrow flow between20°N and25°N in spring was theoretically predicted.It was named the Subtropical Countercurrent(STCC),although direct observational evidences were not yet sufficient to con-firm whether or not such eastward flow between20°N and25°N was a persistent…     

加密探空资料在华东区域业务模式中的应用试验

采用中国气象局2014年6月1日—30日14时加密探空资料,利用华东区域中尺度数值预报业务系统比较同化加密探空观测资料前后模式预报结果的差异。研究表明,同化加密探空资料后,对模式初始时刻不同高度的位势高度、比湿、温度、风速等变量均有一定的影响;对位势高度、温度和风场的影响在高层100—150 h Pa比较显著,而对比湿的影响主要体现在低层700—750 h Pa。同化加密探空资料后模式初始场更接近实况。批量数值试验的统计检验表明,同化加密探空观测资料后对强降水及形势场预报均有不同程度改进,24 h暴雨和大暴雨量级降水的预报技巧分别提高了2.5%和8.1%。     

SHORT COMMUNICATION COMMENTS ON THE RESIDUAL BILINEARIZATION METHOD

Through theoretical analysis and computer simulation,this short communication comments on theresidual bilinearization(RBL)method and compares it with non-bilinear rank annihilation(NBRA)forthe treatment of second-order calibration with non-bilinear data.It is found that these two methods aremathematically equivalent but have different noise propagation properties.The second-order advantage,namely quantitation in the presence of unknown interferences,can be carried over to non-bilinear dataonly if there exists a net analyte rank(NAR)for the analyte of interest.     

Grid dispersion in generating finite-differences synthetic seismograms

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混层矿物概述

混层矿物根据结构可以分为两类:第一类分布广、种类多,它们由同一类型的2:1型铝硅酸盐层构成.分隔这些铝硅酸盐层的间层并非一种.而可以是不同种.例如,云母中的K~+阳离子,蒙脱石和蛭石中的水分子以及交换阳离子等等.第二类是由相互间层的不同类型的2:1型和1:1型层构成.     

Sensitivity of the Equatorial Air-Sea Coupled System to the Zonal Phase Difference between SST and Wind Stress

1. IntroductionMany studies using a variety of coupled models have reproduced ENSO like features(e.g., Hirst, 1986, 1988; Zebiak and Cane, 1987; Battisti and Hirst, 1989; Jin and Neelin, 1993;Jin, 1997; Kirtman, 1997; Kang and An, 1998; Wakata and Sarachik, 1991). But, a variety ofsolutions have been reported depending on different parameterizations of atmospheric processes, particularly the relationship between wind stress and SST anomaly, indicating that therelationship has a large i…