Testing the Ability of Numerical Model to Simulate Climate and Its Change With 4D-EOF Analysis

The four-dimensional empirical orthogonal function (4D-EOF), which in reality is a simple combination of three-dimensional EOF (3D-EOF) and extended EOF (EEOF), is put forward in this paper to test the ability of numerical model to simulate climate and its change. The 4D-E0F analysis is able to reveal not only the horizontal characteristic pattern of analyzed variable, and its corresponding annual and inter-annual variations, but also the vertical structural characteristics. The method suggested is then used to analyze the monthly mean 100-, 500-, 70G-, and 1000-hPa geopotential height fields (4941 grids and grid spacing 60 km) and their anomaly fields in 1989-1998 simulated by the MM5V3 from the RMIP (Regional Climate Model Inter-comparison Project for East Asia)-II, as well as their counterparts (used as the observed fields) from the NCEP/NCAR re-analysis dataset in the same period. The ability of MM5V3 in simulating East Asian climate and its change is tested by comparing the 4D-EOF analysis results of the simulated and observed datasets. The comparative analyzed results show that the horizontal pattern of the first eigenvector of the observed monthly mean geopotential height fields and its vertical equivalent barotropic feature were well simulated; the simulations of the first two eigenvectors of the observed monthly mean geopotential height anomaly fields were also successful for their horizontal abnormal distributions and significant equivalent barotropic features in the vertical were well reproduced; and furthermore, the observed characteristics, such as the variation with height, the annual and inter-annual variations of the monthly mean geopotential height/anomaly fields were also well reflected in the simulation. Therefore, the 4D-EOF is able to comprehensively test numerical model's ability of simulating the climate and its change, and the simulation ability of MM5V3 for the climate and its change in East Asia in the 1990s was satisfactory.     

甘蔗品种过氧化物酶同工酶稳定性分析

以不同甘蔗品种为材料,用垂直平板聚丙烯酰胺凝胶电泳,进行同一品种在不同种植地区及同一植株不同叶位的同工酶酶谱比较。结果表明,不同品种其酶谱在酶带强度、带数及Rf上有明显的区别,但同一品种在不同种植地区、不同植株、同一植株不同叶位其酶诺无明显差异,体现了同工酶作为品种标记的稳定性。     

农区小城市发展与规划的思考

针对我国农村地区小城市规模小,潜力大,起步晚,速度快,困难多,标准氏等特点,提出了市场经济体制下规划必须更加科学化,坚持城乡一体化和投资多元化的方向,阐明了农村地区小城市建设与规划必须坚持改革,发展和严格管理的原则。     

西藏玉龙铜矿床次生氧化富集作用机制

作文阐述了西藏玉龙铜矿床成矿过程中的“沉积初步富集期”和“西藏玉龙铜矿床次生氧化成矿作用模式”,这不仅对指导当前生产具有重要的现实意义,而且为在玉龙铜矿带进一步找矿共作劈了新的方向。     

Hydrocarbon Generating Potential of Mineral—Bituminous Matrix in Source Rocks

Mineral-bituminous matrix(MBM) makes up a major part of source rocks,but its potential in hydrocarbon generation is uncertain,Mineral and organic (Maceral and kerogen) compositions,organic maturity and fluorescence of MBM are studied based on source rock samples from eastern Jiuquan(Jiudong)Basin.The results show that MBM is dominated by inorganic minerals and among the small percentage of organic components those of secondary origins are predominant over the primary species.This strongly indicates that the significance of MBM in hydrocarbon generation is limited.     

谈山西地震档案文献信息系统的研建

为达提高馆藏文献的利用率及为科研和管理部门提供可靠参考依据的目的,提出了建立山西省地震档案文献信息系统的设想。叙述了建立山西地震档案文献信息系统的思路、方法步骤、收录范围、分类方法、著录细则以及检索系统的功能等,指出该系统服务于山西防震减灾事业的前景。     

The Loess in the Qinling Mountains and Its Records of Palaeoenvironmental Changes

The Fengzhou loess section is very typical in the Qinling Mountains. The section, which is about 82 m thick and underlain by Neogene red clays, consists of 33 layers of loess and 33 layers of palaeosol. It covers the Brunhes normal polarity zone and Matuyama reversed polarity zone, and the B/ M boundary is located in the middle part of loess layer 8 (L8). The loess of the Matuyama reversed polarity zone records the Jaramillo, Olduvai and Reunion normal polarity subchrons. The boundary between the Matuyama reversed polarity zone and Gauss normal polarity zone (M / Ga) appears on the lithological boundary between loess and Neogene red clays. Loess accumulation in the Fengzhou section started before 2.48 Ma B.P. Based on the stratigraphical structure, the material composition and magnetic susceptibility curve of the Fengzhou loess section, the palaeoclimatic changes during the last 2.48 Ma in the Qinling Mountains are subdivided into 66 cold-dry and warm-humid stages, equivalent to 33 climatic cycles. The     

膨润土的工艺特性及其应用

膨润土作为一种非常有用的非金属矿物原料,广泛地应用于工业、农业和其他各个领域。近年来对膨润土的不民研究和开发,进一步拓宽了其应用领域。本文试图对膨润土的工艺特性及其应用途径和现状作一系统概述。     

Fracture plane control in rock blasting

ＩＮＴＲＯＤＵＣＴＩＯＮＴｕｎｎｅｌｅｘｃａｖａｔｉｏｎｂｙｂｌａｓｔｉｎｇｍｅｔｈｏｄｉｎｈａｒｄｒｏｃｋｉｓｕｓｕａｌｙａｃｃｏｍｐｌｉｓｈｅｄｗｉｔｈａｄｒｉｌａｎｄｂｌａｓｔｐｒｏｃｅｄｕｒｅｗｈｅｒｅａｂｏｒｅｈｏｌｅｉｓｄｒｉｌｅｄｉｎｔ...     

低温对玉米种子发芽的影响

通过发芽试验研究了东北地区早、中、晚熟３个玉米品种在４℃、８℃、１３℃、１７℃、２１℃和２５℃黑暗条件下的发芽率、发芽势和发芽指数;并求出不同品种的发芽临界温度。结果表明,低温抑制了种子发芽,降低了发芽能力;３个品种发芽的临界温度为３．２￣５．２℃。发芽临界温度愈低,种子的耐低温发芽能力愈强。稀土浸种有提高玉米种子发芽率和促进发芽的作用。