地下流体数据跟踪分析的事件判别方法及分析流程

从正常动态、观测系统故障、自然环境干扰、场地环境干扰、人为干扰、地球物理事件、不明原因变化等多个方面,对地下流体数据跟踪分析的事件判别与分析流程进行探讨,提出相应判别方法和完整分析流程,为流体台站观测人员更好地开展数据分析研究与产出应用工作提供参考和借鉴。     

地下水污染调查样品测试质量远程实时监控管理系统开发

全国地下水污染调查评价工作已全面启动,地下水污染调查评价样品分析质量控制是关键。文章通过对样品分析质量控制需求的分析,开发运行于互联网的地下水污染调查样品测试质量远程实时监控管理系统软件,针对地下水污染测试技术研究中样品测试的质量进行实时评价、实时监控和实时统计,了解实验室的分析测试能力,及时发现和纠正测试工作中存在的问题,从而保障地下水污染调查评价工作的顺利实施。     

暗物质晕次结构的演化研究进展

一般认为暗晕是通过等级成团方式形成的:小质量暗晕先形成,进而通过并合形成较大质量的暗晕。并合后的小质量暗晕形成所谓的次结构,目前关于次结构的演化过程和分布特点尚无明确结论。介绍了利用数值模拟、半解析模型和观测来研究次结构分布和演化的进展,并特别讨论了次结构的并合时标、质量函数和空间分布等特性。     

枯季长江口南槽悬沙输运过程和机制研究

开展枯季河口悬沙输运机理研究对于揭示弱径流条件下的陆海相互作用、河口季节性冲淤和水沙关系等具有重要的科学意义.本文根据2018年12月18-25日长江口南槽3个站位连续13个潮周期的同步流速、流向和悬沙浓度等观测资料,运用通量机制分解法研究了各输沙项的特征、贡献和输运机理.结果 表明,从小潮至大潮流速和悬沙浓度不断增加,由南槽上部至下部流速和悬沙浓度逐渐降低.观测期间平均流速与平均悬沙浓度存在明显的正线性关系,但受底质空间差异影响,悬沙浓度对流速的响应强度存在显著的空间变化.枯季期间南槽存在着中上部向陆净输沙、下部向海净输沙的空间输运格局.平流输沙和潮泵输沙是影响和控制净输沙的关键因素,二者的强度和贡献存在明显的潮周期变化和空间变化,垂向环流输沙的强度很弱,对净输沙贡献很小.南槽涨落潮输沙不对称现象明显,流速、悬沙浓度和历时都具有一定的涨落潮不对称性,这些不对称现象共同调节和控制着潮周期净输沙强度和方向的时空变化.     

An ERDAS image processing method for retrieving LST and describing urban heat evolution: a case study in the Pearl River Delta Region in South China

A spatial-temporal model with Model Maker tool is designed to retrieve Land Surface Temperature (LST) and to describe the changes of urban heat island, as well as urban development. Spectral Radiance, Brightness Temperature, NDVI, and Emissivity are first calculated from TM and ETM+, which are then used to compute LST by using Qin et al.’s mono-window algorithm. The LST is classified based on normalized statistical method, and the normalized heat images are computed between different times. Therefore, the urban heat changes can be shown in the map clearly and directly through an urban heat conversion matrix. Such a model has been applied in this study to obtain the urban heat conversion matrix of South China from 1990 to 2000. The results indicate that the LST increased areas mainly locate along the major roads in the eastern bank of the Pearl River, which is a result of speedy urban expansion and need to be noticed in the future.     

Regional eco-efficiency evaluation and spatial pattern analysis of the Yangtze River Economic Zone

The environmental ecology of the Yangtze River Economic Zone(YREZ) faces ecological function decline, deterioration and degradation under intense human activities, long-term development and utilization and its economy has developed rapidly over recent decades. Eco-efficiency is considered as a measure of coordinated development of economy, resources, environment and ecology, and is currently considered a very important issue. In this paper, based on the slack-based measure and data envelope analysis model, we take 129 prefecture-level cities of the YREZ as the study unit and measure the eco-efficiency of the YREZ in 2000, 2005, 2010 and 2015, which considers undesired output. The evaluation of the status quo of the regional eco-efficiency development was carried out at provincial, prefectural and city scales. The spatial autocorrelation test model and standard deviation ellipse were used to analyze the spatially distributed characteristics and the evolutionary regularity of eco-efficiency. Our study suggested that the eco-efficiency value varied significantly at different spatiotemporal scales and the overall distribution presented an "N-shaped" pattern, the value is the largest downstream and the smallest upstream. Regional eco-efficiency presented certain volatility in growth and a clear spatial positive agglomeration trend from 2000 to 2015. The spatial distribution of each agglomeration area was also significantly different, forming some high-high agglomeration areas at the center of the shaft with Shanghai and surrounding cities, and some low-low agglomeration areas at the center with middle reaches and upstream cities. The low-high over-aggregation and high-low polarization clusters were fewer. At the same time, with the change of the research period, the degree of positive agglomeration became increasingly pronounced and the eco-efficiency gap of the neighborhoodunit reduced. The regional eco-efficiency value of the YREZ presented a spatial distribution pattern in the northeast-southwest axis and the evolutionary pattern of the regional eco-efficiency similarly showed a northeast-southwest orientation.     

ANALYSIS OF EVOLUTIONARY RELATIONSHIP BETWEEN ASTASIA LONGA AND EUGLENA GRACILIS BY USING RAPD TECHNIQUE AND CLADISTIC ANALYSIS

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东秦岭大石沟钼矿床中晶质铀矿年代学研究及其地质意义

东秦岭地区是全球最大的钼成矿带,也是我国最重要的钼矿集区。大石沟矿床是东秦岭地区最为典型的碳酸岩型钼矿床之一。该矿床主体发育钼矿化,并伴生有一定规模的铀、稀土、铅等多金属矿化。前人对该矿床中钼和稀土矿化关注较多,但对铀矿化的报道甚少。鉴于此,本文在野外地质调查的基础上,采集典型的铀矿化样品,综合利用TIMA、扫描电镜、电子探针和LA- ICP- MS等测试方法,对矿床内发育的铀矿化开展了详细的矿相学、矿物化学和同位素年代学研究。结果表明,大石沟矿床中铀矿化的主要含铀矿物为钛铀矿、晶质铀矿和铌钛铀矿。晶质铀矿多呈半自形—他形粒状展布,具有高Y、Ce和低Si、Ti、Na、Mg的地球化学组成。晶质铀矿的U/Th、ΣREE、LREE/HREE等参数表明其为岩浆成因,形成于高温高盐度、相对还原环境。晶质铀矿EPMA U- Th- PbTotal化学定年与LA- ICP- MS 原位U- Pb定年,结果显示铀矿化年龄为～223 Ma,即晚三叠世,表明大石沟碳酸岩中铀矿化形成于秦岭造山带印支期造山后伸展环境。综合前人和本文研究后认为,大石沟矿床中铀矿化年龄与秦岭造山带内碳酸岩型钼矿床的主体形成时代一致,为同时期岩浆活动的产物,可能形成于同一地质事件。     

大数据驱动下的智慧房产全生命周期管理研究

房产管理是一个复杂的过程,具有参与部门广、数据种类多、数据更新频率快、数据量大等特点,如何将分散在不同部门间的房产相关数据进行有效整合、高效管理及智能分析具有重要研究意义.本文利用地理信息、大数据、云计算等技术,将房产进行全生命周期管理,实现房产信息的有效整合,通过对房产数据的深入挖掘和智能分析,为政府管理决策提供信息支撑,为公众提供更智能的民生服务和信息服务.     

旋翼无人机外业像控点布设方案研究

为了解决提高旋翼无人机外业影像控制点测量质量的问题,本文深入研究了基于旋翼无人机低空多视角航空摄影的像控点布设方案.通过大量实验数据和不同像控点布设方案比对,研究确定高质量的布设原则,结果表明:测区四周均匀布设控制点有利于保证区域内部的精度.一般情况下,单点布设的精度不如点组布设精度高,而且点组布设可以提高平面高程的精度.