青色草原种畜场硅藻土矿地质特征及前景展望     

段玉虎  王立武  隋志东 《化工矿产地质》2004,26(3):150-154

青色草原种畜场硅藻土矿产于以更新世玄武岩为基底的盆地中,硅藻土矿体呈近水平层状产出,总体形态为偏长的透镜体。区内有优质的硅藻土及硅藻粘土两个品级矿石。据孢粉及硅藻化石研究可知矿床形成于晚更新世温干的浅水环境。矿区硅藻土品质优良,有良好的发展前景。  相似文献   

Effects of non-submerged boulder on flow characteristics – A field investigation     

Hossein Afzalimehr  Mohammad Reza Maddahi  Danial Naziri  Jueyi Sui 《国际泥沙研究》2019,34(2):136-143

The effect of fully submerged boulders on the flow structure in channels has been studied by some researchers. However, many natural streams have bed material with boulders that are not fully submerged under water. In many natural streams, boulders cover between 1% and 10% of the area of the stream reach. The effect of non-submerged boulders on the velocity profile and flow characteristics is very important for assessing riverbed deformation. The objectives of this paper are to find the pattern of velocity distribution around a non-submerged boulder and to compare it with the classical studies on flow resistance and Reynolds stress distribution in open channels. Also, by considering the variation in the Reynolds stress distribution at different locations around a non-submerged boulder, the effect of a non-submerged boulder on the estimation of shear velocity and resistance to flow has been investigated. Results indicates that inside the scour hole caused by a non-submerged boulder in a river velocity distributions are irregular. However, velocity distributions are regular outside the scour hole. The presence of the boulder causes a considerable deviation of the Reynolds shear stress from the classic distribution, showing a non-specific distribution with negative values. The classical methods for calculating shear velocity are not suitable because these methods do not give detailed velocity and Reynolds stress distributions in natural rivers with a lot of boulders. Thus, the effect of a non-submerged boulder on the estimation of the resistance to flow by considering the variations in velocity and Reynolds stress distributions at different locations around a non-submerged boulder is important and needs to be studied in a natural river instead of just in laboratory flumes. The negative values in Reynolds stress distribution around a boulder indicate that the classical methods are unable to predict resistance to flow, and also show strong turbulence inside the scour hole where the complex flow conditions present ambiguous Reynolds stress distributions. In the current study, to obtain a reasonable estimation of parameters in natural rivers, the classical method has been modified by considering velocity and Reynolds stress distributions through the boundary layer method.  相似文献   

文登市农村集体建设用地整理调查报告     

于忠礼  隋旭光 《山东国土资源》2008,24(1):40-41

世界银行与国土资源部共同实施的“中国经济改革实施”子项目“农村集体建设用地管理利用政策研究”调研工作在文登市展开。为配合专家组调研,根据国土资源部《农村集体建设用地管理利用的政策研究项目报告书》,文登市国土资源局于2007年1月至3月中旬,就农村集体建设用地整理子课题进行了详细的调查和分析,基本摸清了文登市农村集体建设用地整理的现状及潜力。  相似文献   

沂源县耕地资源现状及保护对策分析          下载免费PDF全文

姚慧敏  郑庆云  张玉亭  隋学艳 《山东国土资源》2008,24(7)

沂源县是典型的山区农业县,目前耕地面积日益减少,人地矛盾日趋尖锐,耕地保护面临着较大的压力。为有效保护耕地资源,在对该县耕地资源质量和耕地后备资源现状进行了分析的基础上,提出加大土地开发整理力度、加强基本农田保护和加快中低产田改造等耕地资源保护与可持续利用对策。  相似文献   

Cloning and analysis of phycoerythrin genes inGracilaria Lemaneiformis (Rhodophyceae)     

Sui Zheng-hong  Zhang Xue-cheng 《中国海洋湖沼学报》2000,18(1):42-46

Cloning and sequencing of the genes coding for the α- and β- subunit of phycoerythrin (PE) of a red alga—Gracilaria lemaneiformis (GL) are reported. Alignment of 1084 nucleotides sequenced with three known red algal PE genes,Rhodella violacea (RV),Polysiphonia boldii (PB) andAglaothamnion neglectum (AN), showed high level of conservation, and similarities of 77,6% (between GL and RV), 77.9% (GL and AN) and 79.0% (GL and PB). The similarities of amino acids were 84.8% (between GL and RV), 85.7% (GL and PB), and 80.6% (AN and GL), higher than those among nucleotides. Project 39670405 supported by NSFC and Japanese Science Promotion Society (JSPS).  相似文献   

Preliminary identification of three new isolates in genus Alexandrium (Dinophyceae) from China sea area     

Fan Lijing  Sui Zhenghong  Mao Yunxiang  Guo Hao 《中国海洋大学学报(英文版)》2007,6(1):33-39

The 5.8S ribosomal DNA sequences (5.8S rDNA) and their flanking regions, internal transcribed spacer 1 and spacer 2 (ITS1 and ITS2) of three new isolates in genus Alexandrium (Alexandrium sp. qd1, Alexandrium sp. qd2, Alexandrium sp. gz) from China were amplified, sequenced, and subjected to phylogenetic analysis. Alexandrium sp. gz and Alexandrium sp. qd1 were grouped with high bootstrap values with four strains/species, i.e., A. catenella South Korea strain, A. catenella Japan strain, and two from China, Alexandrium sp. AC03 and Alexandrium sp. AN01 being proposed to be A. catenalla in a previous study. Then Alexandrium sp. gz and Alexandrium sp. qd1 were identified as Alexandrium catenella. As A. catenella was isolated from Qingdao and Guangzhou sea areas, it supposedly distributed at least in these two areas and was genetically different. Alexandrium sp. qd2 differed greatly from species in Alexandrium. It clustered with Symbiodinium californium, Symbiodinium sp. G15 and Gymnodinium sp. Zhao 01 with 100% bootstrap value; so Alexandrium sp. qd2 affiliates to genus Symbiodinium, and is probably a free-living Symbiodinium species.  相似文献   

校园控制点成果管理信息系统设计与实现     

隋铭明  束蝉方  陈健  王志杰 《现代测绘》2007,30(6):43-44,48

测量控制点成果管理信息系统是基础地理信息系统的重要组成部分，对于众多拥有测绘专业的高校来说，对校园内的控制点成果加以科学管理，为教师和学生及实验人员提供准确、高效的数据服务，是校园测量控制点成果管理信息系统建设的根本出发点。本文介绍了测量控制点的特点，研究设计了系统的总体架构、功能设计和数据组织，最后实现了集GIS功能于一体的图、文、表并茂的校园测量控制点成果管理信息系统。  相似文献   

测量学教学中钢尺精密量距计算问题讨论     

束蝉方  隋铭明  潘庆林 《现代测绘》2007,30(6):41-42

一些文献及在教学过程中有学生对测量学教材中钢尺精密量距计算公式提出了疑问，本文针对这些疑问进行讨论，并给出了一些教学中的建议。  相似文献   

Tropical convective responses to microphysical and radiative processes: a sensitivity study with a 2-D cloud resolving model   总被引：1，自引：0，他引：1  

X. Li  C.-H. Sui  K.-M. Lau  W.-K. Tao 《Meteorology and Atmospheric Physics》2005,90(3-4):245-259

Summary Prognostic cloud schemes are increasingly used in weather and climate models in order to better treat cloud-radiation processes. Simplifications are often made in such schemes for computational efficiency, like the scheme being used in the National Centers for Environment Prediction models that excludes some microphysical processes and precipitation-radiation interaction. In this study, sensitivity tests with a 2-D cloud resolving model are carried out to examine effects of the excluded microphysical processes and precipitation-radiation interaction on tropical thermodynamics and cloud properties. The model is integrated for 10 days with the imposed vertical velocity derived from the Tropical Ocean Global Atmosphere Coupled Ocean–Atmosphere Response Experiment. The experiment excluding the depositional growth of snow from cloud ice shows anomalous growth of cloud ice and more than 20% increase of fractional cloud cover, indicating that the lack of the depositional snow growth causes unrealistically large mixing ratio of cloud ice. The experiment excluding the precipitation-radiation interaction displays a significant cooling and drying bias. The analysis of heat and moisture budgets shows that the simulation without the interaction produces more stable upper troposphere and more unstable mid and lower troposphere than does the simulation with the interaction. Thus, the suppressed growth of ice clouds in upper troposphere and stronger radiative cooling in mid and lower troposphere are responsible for the cooling bias, and less evaporation of rain associated with the large-scale subsidence induces the drying in mid and lower troposphere.  相似文献   

对大连历年汛期起止日期的客观判定   总被引：3，自引：1，他引：2  

王玲玲  邹耀仁  隋洪起 《气象》2000,26(3):12-16

根据大连市 195 1～ 1998年的逐日降水量资料 ,应用扫描 t检验方法对每年入汛期和出汛期进行了判定和分析 ,并与目前使用的经验方法划定的日期作了比较。结果表明 ,t检验方法能更客观、准确地判定汛期的开始日期和结束日期。  相似文献