Stratigraphic evolution of the nearshore to fluvial plain of the Upper Cuyo Group,Neuquén,Argentina

The upper portion of the Cuyo Group in the Zapala region, south‐eastern Neuquén Basin (Western Argentina), encompasses marine and transitional deposits (Lajas Formation) overlain by alluvial rocks (Challacó Formation). The Challacó Formation is covered by the Mendoza Group above a second‐order sequence boundary. The present study presents the stratigraphic framework and palaeophysiographic evolution of this Bajocian to Eo‐Calovian interval. The studied succession comprises the following genetic facies associations: (i) offshore and lower shoreface–offshore transition; (ii) lower shoreface; (iii) upper shoreface; iv) intertidal–subtidal; (v) supratidal–intertidal; (vi) braided fluvial to delta plain; (vii) meandering river; and (viii) braided river. The stratigraphic framework embraces four third‐order depositional sequences (C1 to C4) whose boundaries are characterized by the abrupt superposition of proximal over distal facies associations. Sequences C1 to C3 comprise mostly littoral deposits and display well‐defined, small‐scale transgressive–regressive cycles associated with fourth‐order depositional sequences. Such high‐frequency cycles are usually bounded by ravinement surfaces associated with transgressive lags. At last, the depositional sequence C4 delineates an important tectonic reorganization probably associated with an uplift of the Huincul Ridge. This is suggested by an inversion of the transport trend, north‐westward during the deposition of C1 to C3 depositional sequences (Lajas Formation) to a south‐west trend during the deposition of the braided fluvial strata related to the C4 depositional sequence (Challacó Formation).     

基于LiDAR技术的古建筑复杂曲面三维重建

随着信息技术和测绘科学的迅猛发展,传统的空间数据获取模式已经不能满足现在的信息化需求。三维激光扫描技术的出现,推动了现代化测绘技术的发展,其高精度、快速的非接触式扫描测绘方法改变了传统空间数据采集模式。古建筑文化遗产的三维数字化保护是目前社会的研究热点,利用三维激光扫描技术来重建古建筑独特复杂的表面模型,为古建筑数字化管理和修复提供数据参考是一个很有意义的事情。本文以利用地面三维激光扫描系统构建古建筑三维模型为研究对象,通过洞窟类实例对古建筑点云数据处理和NUBRS三维模型复杂曲面重建技术进行研究与探讨。     

“多规合一”信息平台架构设计——以南京市为例

"多规合一"是党和国家近年来积极推进的改革措施,是推进城市治理体系和治理能力现代化的有力抓手。"多规合一"信息平台是科学开展"多规合一"工作,促进部门规划数据共享共建、加强各规划编制过程衔接的重要技术支撑。在当今智慧城市建设如火如荼,"天地图""互联网+政务服务"等政府改革措施大力推进的背景下,"多规合一"信息平台应当如何构建,如何有效衔接既有智慧城市成果,是一项需要综合考虑的问题。本文以南京市为例,在深入梳理国内典型城市"多规合一"信息平台建设经验的基础上,从数据架构、业务架构、应用架构、技术架构4个方面全面开展"多规合一"信息平台架构设计,以期为后续其他城市信息平台的建设实施提供指导。     

Predicting the visualization intensity for interactive spatio-temporal visual analytics: a data-driven view-dependent approach

The continually increasing size of geospatial data sets poses a computational challenge when conducting interactive visual analytics using conventional desktop-based visualization tools. In recent decades, improvements in parallel visualization using state-of-the-art computing techniques have significantly enhanced our capacity to analyse massive geospatial data sets. However, only a few strategies have been developed to maximize the utilization of parallel computing resources to support interactive visualization. In particular, an efficient visualization intensity prediction component is lacking from most existing parallel visualization frameworks. In this study, we propose a data-driven view-dependent visualization intensity prediction method, which can dynamically predict the visualization intensity based on the distribution patterns of spatio-temporal data. The predicted results are used to schedule the allocation of visualization tasks. We integrated this strategy with a parallel visualization system deployed in a compute unified device architecture (CUDA)-enabled graphical processing units (GPUs) cloud. To evaluate the flexibility of this strategy, we performed experiments using dust storm data sets produced from a regional climate model. The results of the experiments showed that the proposed method yields stable and accurate prediction results with acceptable computational overheads under different types of interactive visualization operations. The results also showed that our strategy improves the overall visualization efficiency by incorporating intensity-based scheduling.     

基于综合监控和负载调控的中国天气网网站弹性架构

中国天气网是中国气象局面向公众提供气象信息服务的核心门户。为适应其日益增长的访问量,并保障网站可用性及访问体验等要求,网站已建立包含可用性、用户体验、网站访问、网络、安全、系统和应用等多方面的综合监控系统。实现了可根据体验、可用性、成本、安全等多方面因素,可面向多种具体业务场景的灵活多样的负载调控手段。基于监控和调控,构建了经内容本地加速的多源站弹性架构。在访问体验、可用性、带宽容量、安全、成本、业务特性需求等多方面提升了网站能力。     

嵌入式GIS系统实时响应的软件方法实现

嵌入式GIS的大量应用使得研究其实时性具有现实意义,选定嵌入式处理器等硬件平台后,可通过软件方法改善其实时性能。空间数据组织结构、多任务双缓存技术、地图符号绘制算法和合理数据调度等方法在本文中被详细阐述以提高实时性。测试结果表明,综合运用这些方法是有效的。     

地理信息系统集成平台框架结构研究

提出了基于客户／服务器结构的地理信息系统集成平台总体结构,探讨了基于元数据的地理信息系统数据集成平台以建立物理上分布而逻辑上集中的分布式地理信息系统数据库,提出了应用符合３ＮＦ范式的关系数据库进行模型管理的模式,在此基础上探讨了地理信息系统可视化建模工具。     

Differential transgression of rift basin and characteristic response of sedimentary system within sequence framework: An example from the Paleogene Shahejie Formation in Baxian sag,Bohai Bay Basin

Multi-stage differential transgression controls sequence architecture and its sedimentary type and distribution during the tectonic evolution of lacustrine rift basin. Combined with the seismic data of the Baxian sag as well as drilling,logging,core and paleontological materials from 800 exploration wells,the study targeted the Members 1 and 3 of the Shahejie Formation to analyze sequence architecture and sedimentological difference within the sequence framework during the differential lake transgression,based on the investigation of the Paleogene lake basin evolution. The results showed that the fault slope-break slope architecture was well developed with back-stepping deltas and fan deltas during the slow lake transgression of the Member 3 of Shahejie Formation,in which forms thick high quality source rocks. The flexural-gentle slope architecture was well developed with mixed beach bar and small scale nearshore subaqueous fans(fan deltas)during the rapid transgression of the Member 1 of Shahejie Formation. The differential subsidence controlled the sequence architecture,paleogeomorphology and provenance supply,regulating the spatial lithological distribution. And there are significant differences in sequence architecture and sedimentary system during the different evolution stages of the lake basin. On this basis,the response model of sedimentary system characteristics under differential lacustrine transgression is established,which can be used for reference for oil and gas exploration,especially for lithologic oil and gas reservoir in the same type of basin.     

商业建筑的昨天今天和明天

从人们交换农业、手工业产品的“市”到店铺林立的商业一条街,商业和商业建筑的发展与社会和经济的发展密不可分,现代商业建筑的发展更与人们生活和消费水平分不开。因此,必须研究人们的职业与消费习惯、消费心理、做好市场调查和预测,把握市场机遇,创造适合经济和社会发展各阶段的商业间环境,研究国外现代商业建筑的发展,借鉴其经验,使我国商业建筑沿着正确的道路发展。