贵州兴仁县落水洞金矿的发现及其研究意义

根据灰家堡背斜成矿规律分析研究,2006年11月在回龙镇落水洞布置ZK001钻孔,在其深部发现高品位矿体,这一发现为太平洞金矿提供了后备勘查基地,填补灰家堡背斜中部无工业矿体的空白。本文简要地论述其地质特征和研究意义。     

柴达木盆地西南缘乌南油田新近系古地震纪录及储集性能研究

柴达木盆地为一新生代以来形成的叠合盆地,由于多期构造活动,盆内形成了多组断裂系统。受新近纪昆仑山北侧断裂活动的影响,盆地西南缘乌南地区地震活动强烈,发育一系列与地震有关的震积岩,形成多种类型的与地震活动有关的软沉积物变形构造。乌南油田新近系的软沉积物变形构造主要包括重荷模、火焰构造、震积砂枕、砂球构造、假结核、枕状层、液化砂泥岩脉、泄水构造、层内错断、地裂缝、串珠状构造、微褶皱纹理等。本区震积岩的岩石类型主要包括震褶岩、震裂岩、震塌岩、自碎屑角砾岩等。地震活动使岩层产生大量的微裂缝,裂缝沟通了原有的孔隙。尽管储集层孔隙度没有大幅度增加,但能够极大地改善储集层渗透性,使渗透率大幅度增加。震积岩特别是震裂岩和震碎角砾岩是一种潜在的油气储层,为油气勘探和开发提供了新的视角和领域。     

GPS软件接收机信号特征分析

介绍了GPS信号的组成及特性,研究了信号的预处理过程,用Matlab实现了采样后的GPS信号的特征的绘制.     

乙酸和碳酸对粘土土工性状影响的试验

对加入不同浓度乙酸和碳酸的土样做室内土工试验,并进行机理分析。试验结果表明:乙酸根、碳酸根通过改变粘土颗粒双电层的厚度、极性水分子的吸附量,使土的结构发生凝聚或分散,引起压实粘土的塑性、渗透性等变化。其中,乙酸根是通过溶解粘土矿物中的铝,提高了粘土的渗透系数和塑性指数;而碳酸根是以其与金属离子发生化学反应生成难溶性碳酸盐的方式,降低了粘土的渗透系数。这为判断垃圾堆放场粘土衬垫工程的稳定性提供了依据。     

Exploring a combination of objective and subjective assessment in landscape classification: Side case from Turkey

Landscape is a product of interactions between human and nature that bring multiple characteristics to discrete geographic settings. Landscape character assessment (LCA) is a process of describing, mapping and evaluating distinct characters in the landscape. The aim of this study is to integrate objective and subjective assessment in landscape classification in the case of Side district in Antalya, Turkey. The methodology of the study is based on a holistic approach to combine map-based biophysical information and on-site visual landscape characteristics into the LCA process. Principal component and cluster analysis were used to understand relationships and spatial patterns between 29 landscape character areas and types which were previously defined by previous work. The main source of data was landscape characters, and 35 character attributes was processed as variables. Cluster analysis showed that landscape character areas and types in Side were gathered into two main cluster groups and five sub clusters. The majority of landscape character areas tended to constitute separate subclusters, while character types appeared to form large groups of clusters in which recognisable land-use patterns were the main activity. According to the cluster dendrogram, it was possible to interpret spatial linkages between the clusters of character areas and types and to delineate geographic classification of the main landscapes in Side. Scaling relations for LCA in a pattern-process-product framework provided an explicit understanding of the data layers in landscape classification and where the clustering can function. Biophysical characteristics comprised the pattern of the landscape, while visual characteristics demonstrated the condition of the landscape as a product. The process depends upon transformation between the objective and the subjective as a link between pattern and product. Further steps would be to conduct semistructured surveys to assess local perceptions and preferences about landscape characters for landscape quality objectives.     

德国在华知识密集制造业投资进入方式的时空特征及区位影响因素

外资知识密集型制造业进入中国市场,对中国制造业升级转型起着一定的作用。本文围绕区域制度环境和区域吸收能力,探讨影响知识密集型企业进入方式的区域环境,旨在揭示知识密集型产业的外商进入方式的地理驱动机制,有利于加深理解在经济发展方式转型的时代背景下,区域与城市获得外生技术发展动力的机制。采用从1982-2014年德国在华投资企业数据库,结果发现,德国知识密集型制造企业在中国的投资呈现由沿海地区向内陆地区扩张、沿海中心城市向周边城市扩散的时空趋势,并且在1995年后,其进入方式从合资为主向独资为主转变。逻辑计量模型显示,德国知识密集型制造企业的进入方式受到多项区位因子的影响,其中地方人力资源水平和产业专业化水平是知识密集型制造企业选择以合资方式的进入中国市场的重要区位因素,表明区域知识吸收能力是形成全球—地方战略协同的关键变量;另一方面,实际使用外资存量和地方专利授权量这两个区位影响因素则会显著促成知识密集型制造企业采用独资的进入决策,反映了区域制度环境对吸引以知识产权保护为战略核心的知识密集型制造业的作用。     

广东省旅游产业广域空间集聚分布特征及其影响因素分析

产业的空间集聚是区域经济发展的必经阶段。选择旅游产业在广域空间的集聚现象进行研究,针对已有研究在地理学方法使用上的不足,以A级景区、旅行社、星级酒店作为旅游产业的核心组成,采用最近邻指数、核密度估计、缓冲区分析,对旅游产业在案例区域的集聚分布程度、集聚分布特征及集聚影响因素进行分析和揭示,研究发现:案例空间总体呈现明显的旅游产业集聚;A级景区、旅行社和星级酒店的集聚形态呈现不同演化特征,表现出点状、组团状等不同集聚分布特征;城市自身基础和区位条件影响着旅游核心企业的布局和选址;区位综合价值对集聚分布有主要影响。     

基于Tesseract-OCR的复杂发票自适应识别

针对复杂发票任意区域下的特定表格内容提取与实时识别问题,提出了一种基于Tesseract-OCR引擎的自适应识别方法.首先利用OpenCV对发票图像进行预处理滤波、自适应阈值等一系列预处理得到二值图像;然后利用形态学中的开运算提取表格全域线段,进行表格位置提取,并结合表格交点坐标与自定义模板,实现表头与内容自适应适配;最后利用jTessBoxEditor对表格区域内容进行字库训练优化,最终实现基于Tesseract-OCR的字符识别.实验结果表明该方法具有高准确识别率,支持感兴趣区域自适应识别,具备高可用性.     

Recent morphology and sedimentary processes along the western slope of Great Bahama Bank (Bahamas)

Carbonate slopes and associated resedimented deposits have recently gained renewed interest because they represent volumetrically significant parts of carbonate platforms. Carbonate slopes are highly variable compositionally, architecturally and spatially due to a spectrum of sediment sources, resedimentation processes and controlling factors. Here, new high resolution acoustic data (including EM 302 multi‐beam echo‐sounder and very high resolution seismic) and piston cores document highly diverse and complex morphological features along the north‐western slope of Great Bahama Bank. The recent morphology of the slope is the result of the interplay between depositional and erosive processes that vary through time and along strike. The different sedimentary processes are recorded as a Pleistocene lowstand surface, characterized by many erosional features and a Holocene sedimentary wedge along the upper to middle slope that partially covers the underlying Pleistocene surface. Sedimentary processes during the Holocene are dominated by density cascading flows, which export muddy aragonitic sediment from the platform top towards the slope. Sedimentation rates, however, vary along strike due to platform top morphology combined with the variable strength of the basinal current. Reefs and islands in the Bimini area block off‐bank sediment export, and shoals and tidal deltas from Cat Cay to the south reduce the density cascading processes. Numerous small and large slope failure scars show the instability of the steep slopes of Great Bahama Bank. Bottom currents dominate the lower slope and the basin. Striations and moats are the morphological expressions of current directions, while areas of non‐deposition document strong current and concomitant removal of off‐bank transported sediment along parts of the slope, while the Santaren Drift and the drift on the north‐western edge of Great Bahama Bank act as the depositional locus for the fine‐grained sediments transported in the current.     

贵州省务川—正安—道真地区大竹园式铝土矿典型矿床特征及资源潜力预测

本文通过对务正道地区成矿地质背景的分析典型矿床特征的研究,总结了区内的典型矿床成矿要素、成矿模式、区域成矿要素及区域成矿模式,从而建立了区内的预测模型,对区内资源潜力进行预测,圈定了八个成矿预测区,具有较好的找矿前景,资源潜力巨大。对实现区内找矿突破具有重要的指导意义。