海洋地质地球物理数据分类与组织     

刘志杰  孔敏  舒雨婷  王风帆  韩璐遥  田先德 《海洋通报》2019,38(4):415-421

信息技术的快速变革,有效驱动海洋信息化的发展与创新。实现海洋信息资源的高效存储和管理,需要对海洋数据管理体系进行统筹规划。文章根据海洋地质地球物理数据特点,进行了数据层次分类研究,分析了数据标准化过程,确立了基于文件和数据库的海洋地质地球物理数据存储策略,提出结构化事务型数据库、结构化分析型数据库(NewSQL)和非结构化计算型数据库(NoSQL)相结合的数据组织架构。该数据分类组织方案为实现海洋地质地球物理数据规范化管理、集约利用和共享服务奠定了良好基础,也为其他海洋数据分类与组织研究提供了参考。  相似文献   

山东省东平—汶上铁矿带西侧低缓磁异常区铁矿初步验证及意义——以李官屯隐伏低缓磁异常铁矿为例          下载免费PDF全文

迟乃杰  刘传娥  熊玉新  单伟  程伟  舒磊  孙雨沁 《山东国土资源》2019,35(4)

研究区位于鲁西地区重要的东平—汶上铁矿带西侧,为低缓磁异常区。通过高磁测量、井中三分量磁测、钻探验证等手段,在梁山李官屯附近低缓磁异常区发现铁矿一处,矿床类型为条带状铁建造(BIF)型铁矿。该区下伏地层主要为新太古代泰山岩群山草峪组,岩性为黑云变粒岩,局部夹磁铁石英岩、磁铁角闪石英岩,矿石的主要组成矿物为磁铁矿、黄铁矿、黄铜矿。研究区山草峪组大面积分布,根据成矿时代、赋矿层位、含铁建造及岩石组合,结合成矿规律研究分析,梁山地区的大面积条带状分布的低缓磁异常区是寻找隐伏铁矿体的有利部位。  相似文献   

Development of grouting materials with application to the protection of the geological relics of the Weng'an Biota     

WANG Sheng  SHU Zhi-hong  GUO Kai-bin  JIAN Li-ming  CHEN Li-yi 《山地科学学报》2019,(8)

The Weng'an Biota, a fossil KonservatLagerst?tte in South China that is c. 570 – 609 myr old, preserves the world's oldest zoolite and provides a unique empirical record for studying animal origins and early evolution. Due to geological disasters caused by the exploitation of the local phosphate mine, part of the fossilized records and the geological sections of the Weng'an Biota have been seriously damaged. Protection of this unique fossil area is urgently required. In this research, an innovative scheme for the protection of the geological relics of the Weng'an Biota is proposed by backfilling the mine cavity with specially formulated grouting materials. In view of the shortcomings of the current grouting materials, such as the high proportion of water separation, the low stone percentage and high cost, newly developed grout materials consisting of mixtures of cement-fly ash-expansion agent(C-F-E) were systematically studied by a combined method of theoretical analysis and experimental study. Firstly, new grouting materials(C-F-E) were developed using selected proportions of(1) Portland cement(P·O 32.5),(2) external admixture(Fly ash),(3) expansion agent(NV) and(4) admixture(DFZ). Then, the properties of new grouting materials(C-F-E), such as stability, stone percentage, rheology, fluidity, setting time and compressive strength were evaluated by laboratory tests. Finally, a new model of the hydration process was proposed for these newly developed grouting materials based on a detailed scanning electron microscopy(SEM) study of their microstructural development. These research results will provide an effective solution to the protection of the geological relics of the Weng'an Biota. Additionally, these grouting materials may prove suitable for solving similar problems in the management of most mine cavities requiring stabilization in the future.  相似文献   

Retrieval of Snow Depth on Sea Ice in the Arctic Using the FengYun-3B Microwave Radiation Imager     

LI Lele  CHEN Haihua  GUAN Lei 《中国海洋大学学报(英文版)》2019,(3)

Snow on sea ice is a sensitive indicator of climate change because it plays an important role regulating surface and near surface air temperatures. Given its high albedo and low thermal conductivity, snow cover is considered a key reason for amplified warming in polar regions. This study focuses on retrieving snow depth on sea ice from brightness temperatures recorded by the Microwave Radiation Imager(MWRI) on board the FengYun(FY)-3 B satellite. After cross calibration with the Advanced Microwave Scanning Radiometer-EOS(AMSR-E) Level 2 A data from January 1 to May 31, 2011, MWRI brightness temperatures were used to calculate sea ice concentrations based on the Arctic Radiation and Turbulence Interaction Study Sea Ice(ASI) algorithm. Snow depths were derived according to the proportional relationship between snow depth and surface scattering at 18.7 and 36.5 GHz. To eliminate the influence of uncertainties in snow grain sizes and sporadic weather effects, seven-day averaged snow depths were calculated. These results were compared with snow depths from two external data sets, the IceBridge ICDIS4 and AMSR-E Level 3 Sea Ice products. The bias and standard deviation of the differences between the MWRI snow depth and IceBridge data were respectively 1.6 and 3.2 cm for a total of 52 comparisons. Differences between MWRI snow depths and AMSR-E Level 3 products showed biases ranging between-1.01 and-0.58 cm, standard deviations from 3.63 to 4.23 cm, and correlation coefficients from 0.61 to 0.79 for the different months.  相似文献   

北江大刺鳅(Mastacembelus armatus)的核型分析及线粒体Cyt b基因和D-loop的遗传多样性     

李芬  陈绮萍  何佩莹  黄小琪  陈忠凯  周惠强  钟东明  舒琥 《海洋与湖沼》2019,50(2):449-454

采用胸腔注射植物凝集素(PHA)、秋水仙素,以大刺鳅(Mastacembelus armatus)头肾组织为材料,低渗处理,空气干燥法进行染色体标本制备,分析其染色体核型。结果显示:大刺鳅的二倍体染色体数目为2n=48,其核型公式为2n=14m+34t, NF=62。对24尾大刺鳅线粒体Cyt b基因和D-loop序列进行测序分析,结果表明:(1)大刺鳅Cytb基因、D-loop序列长度分别为1438bp、895bp,两个基因的单倍型多样性分别为0.656和0.541,核苷酸多样性分别为0.00539和0.00817,平均核苷酸差异数分别为5.938和6.805,说明该种群的遗传多样性丰富。(2)两个基因的每个个体的遗传距离分别为0.000—0.018和0.000—0.026,说明该种群个体间的遗传距离小。(3)中性检验的Tajima’sD检验及Fu's Fs检验的结果说明该种群没有发生过扩张。结果说明北江大刺鳅的遗传多样性水平较高,可用于人工繁育。  相似文献   

马钱子碱透皮贴剂致突变实验研究          下载免费PDF全文

崔姣  舒畅  许惠琴 《应用海洋学学报》2019,35(6):136-138

目的：探讨马钱子碱透皮贴剂的安全性。方法：采用小鼠骨髓细胞微核实验和姐妹染色单体互换实验研究马钱子碱透皮贴剂对小鼠骨髓细胞的致突变影响。2组实验均分为空白对照组，马钱子碱透皮贴剂小、中、大剂量组，环磷酰胺组，均分别予以空白基质贴皮，马钱子碱透皮贴剂120、240、480mg/kg体质量贴皮，腹腔注射环磷酰胺30、20mg/kg体质量，分别计算各组小鼠骨髓细胞微核（MN）发生率、姐妹染色单体互换（SCE）数。结果：与空白对照组比较，马钱子碱透皮贴剂3个剂量组小鼠骨髓细胞MN发生率和SCE数差异均无统计学意义（P>0.05）。结论：马钱子碱透皮贴剂无致突变作用，在一定剂量下具有安全性。  相似文献   

海洋环境调查资料分类与编码研究          下载免费PDF全文

刘志杰  孔敏  舒雨婷  崔晓健  杨扬  吴春芳 《海洋开发与管理》2020,37(1):34-38

为确保海洋环境调查资料在汇集、处理、管理和服务全过程中语义表达的一致性,需采用统一分类和编码技术,设计资料分类编码体系,以满足海洋环境调查资料的汇集、管理与服务需求。在对海洋调查资料分类现状研究的基础上,系统分析了分类影响因素,提出了分类原则和方法,初步构建了基于学科、数据类型和调查方式为主的海洋调查资料分类体系,并对其进行规范化编码。目前该分类体系与编码已应用到海洋环境资料和信息管理业务化工作中。  相似文献   

广东沿海香港牡蛎消化道异养菌统计及其耐药性研究     

李炳  王瑞旋  谢燕纯  舒琥  牟红莉  郭子晗  王江勇 《海洋科学》2020,44(3):50-58

本研究针对高温时期(6月、9月)广东沿海地区的香港牡蛎(Crassostrea hongkongensis)体内异养细菌总数和弧菌总数进行了深入的调查,并由添加单种抗生素(分别是:庆大霉素、呋喃唑酮、利福平、环丙沙星、恩诺沙星、氯霉素、复方新诺明)的培养基中分离得到310个菌株。进一步采用纸片扩散法(kirby-bauer法)针对常见的抗生素对此310个菌株进行药敏测试,了解不同来源菌株的耐药状况。结果表明310个菌株分属48个不同种属,主要是肠杆菌(Enterobacter)、弧菌(Vibrio)、芽孢杆菌(Bacillus)、肺炎克雷伯菌(Klebsiella)、希瓦氏菌(Shewanella)、不动杆菌(Acinetobacter)、假单胞菌(Pseudomonas)、短波单胞菌(Brevundimonas)、发光杆菌(Photobacterium)、黄杆菌(Tenacibaculum)、盐单胞菌(Halomonas)等。在9月份从牡蛎体内分离的异养细菌比6月份分离的异养细菌高出1～2个数量级(除台山外)。6月份从台山地区牡蛎分离的异养细菌数(2.6×10~6～5.8×10~6 cfu/g)最多,高出其他地区1～3个数量级。药敏测试结果显示牡蛎体内异养细菌对20种抗生素普遍存在抗性,尤其对青霉素、卡拉霉素、呋喃唑酮、阿莫西林、克林霉素及万古霉素表现出较高的耐药率。高温时期(6月、9月)分离的异养菌大多数为多重耐药细菌,其比例分别为84.18%和91.72%。本研究将为牡蛎养殖业的疾病控制以及水产养殖中细菌的耐药状况提供重要参考依据。  相似文献   

准噶尔盆地腹部下侏罗统三工河组储层物性—含油性特征及主控因素分析     

王金铎  许淑梅  张关龙  任新成  曾治平  武向峰  舒鹏程  冯怀伟 《地质论评》2022,68(1):2022010014-2022010014

为解决准噶尔盆地腹部沙窝地、莫西庄和征沙村三地区下侏罗统三工河组砂岩储层物性—含油性差异大及控制因素不清的问题,本文通过岩芯描述、铸体薄片和扫描电镜分析,依据物性数据及压汞资料,对研究区三工河组储集空间特征、孔渗特征及孔喉结构特征进行了详细的研究,通过隔夹层分析、岩屑成分及含量分析、成岩特征研究等方法探讨了制约研究区三工河组储层物性—含油性关系的主控因素,研究表明沙窝地和莫西庄小区三工河组储层埋深相对较浅,主要以中粗孔喉和较细孔喉的原生（残留）孔隙为主;征沙村小区埋藏较深,以细孔喉和微孔喉的次生孔隙及裂缝发育为特色。在此基础上探讨了三工河组储层物性的控制因素,研究认为埋藏深度为影响储层发育的主要因素;沉积微相和砂体成因类型为控制储层发育的基础;低地温梯度延迟了压实效应等,有效保存了原生孔隙;塑性岩屑含量、储层的隔层和夹层因素,即储层的非均质性在某种程度上影响砂体的储集性。  相似文献   

Influence of hydrate exploitation on stability of submarine slopes     

Zhao  Yapeng  Kong  Liang  Liu  Lele  Liu  Jiaqi 《Natural Hazards》2022,110(1):719-740

Urban pluvial flash floods have become a matter of widespread concern, as they severely impact people’s lives in urban areas. Hydrological and hydraulic models have been widely used for urban flood management and urban planning. Traditionally, to reduce the complexity of urban flood modelling and simulations, simplification or generalization methods have been used; for example, some models focus on the simulation of overland water flow, and some models focus on the simulation of the water flow in sewer systems. However, the water flow of urban floods includes both overland flow and sewer system flow. The overland flow processes are impacted by many different geographical features in what is an extremely spatially heterogeneous environment. Therefore, this article is based on two widely used models (SWMM and ANUGA) that are coupled to develop a bi-directional method of simulating water flow processes in urban areas. The open source overland flow model uses the unstructured triangular as the spatial discretization scheme. The unstructured triangular-based hydraulic model can be better used to capture the spatial heterogeneity of the urban surfaces. So, the unstructured triangular-based model is an essential condition for heterogeneous feature-based urban flood simulation. The experiments indicate that the proposed coupled model in this article can accurately depict surface waterlogged areas and that the heterogeneous feature-based urban flood model can be used to determine different types of urban flow processes.

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