Frequency analysis across the drowning of a Lower Jurassic carbonate platform: The Calcare Massiccio Formation (Apennines,Italy)

This work illustrates the evolution the Lower Jurassic shallow-water carbonates known as the Calcare Massiccio Formation in the Central Apennines (Italy). The Calcare Massiccio is characterized by lateral and vertical variability in the facies associations, related to an articulated physiography of the Triassic to Lower Jurassic carbonate platform and to its tectonic evolution. This work documents the depositional environment changes during the platform evolution. Quantitative analysis on samples collected from three stratigraphic sections were performed through the Calcare Massiccio succession allowed up to the overlying Pliensbachian pelagites. Two type of carbonate sedimentation have been recognized: in the peritidal and shallow subtidal environments (Calcare Massiccio A) the carbonate production is dominated by microbial activity, while the carbonate sedimentation in a deeper environment of middle to outer ramp (Calcare Massiccio B), is dominated by a bioclastic sedimentation.The evolution from the Calcare Massiccio A to the B can be interpreted as the product of increase of accommodation that in turn produced a backstepping of carbonate facies belt, the photic microbial dominated peritidal facies developed on the persistent Latium-Abruzzi Platform while the bioclastic carbonate production factory settled on the structural highs resulting from the dismembering of the platform by syn-sedimentary tectonic.The bioclastic carbonate factory was not efficient in filling the available accommodation space produced by Sinemurian extensional tectonic. This inefficiency was amplified by the restricted area available for this factory in the small structural highs. These conditions were sufficient to predispose the platform to the drowning without invoke change in the trophic resource or change in the palaeoceanography.     

Distinguishing tectonically-and gravity-driven synsedimentary deformation structures along the Apulian platform margin (Gargano Promontory,southern Italy)

The assessment of deformation types within the slope of a carbonate platform can be complicated by the possible interaction of rooted (tectonically-induced) and superficial (gravity-driven) structures. An ideal case study to document and distinguish tectonically- and gravity-driven structures is provided by the Cretaceous slope-to-basin carbonates exposed in the Gargano Promontory, southern Italy. These carbonates formed adjacent to the Apulian platform margin, which was oriented approximately NE–SW to NW–SE along the southern and northern edges of the promontory, respectively. Slump-related folds are characterised by axial planes typically oriented either sub-parallel or at small angles to the strike of the inferred paleoslope. In fact, the strike of folds is roughly NE–SW in the southern portion of the study area, whereas it is NW–SE in the northern part. Correspondingly, gravity-driven normal and reverse faults strike sub-parallel and at acute angles to the adjacent Apulian paleoslope. Cretaceous tectonic faults in the slope-to-basin carbonates form two principal sets striking NW–SE and WNW-ESE. The former set is made up of normal faults and the latter one includes mainly oblique-slip normal faults. Neither normal nor oblique-slip normal faults show any relationship with the geometry of the paleoslope. The results obtained from this study may help the interpretation of subsurface data in those geological contexts in which the interplay of gravitational and tectonic processes is responsible for deformation.     

Sensitivity Analysis of Air Gap Motion with Respect to Wind Load and Mooring System for Semi-Submersible Platform Design

A design of semi-submersible platform is mainly based on the extreme response analysis due to the forces experienced by the components during lifetime. The external loads can induce the extreme air gap response and potential deck impact to the semi-submersible platform. It is important to predict air gap response of platforms accurately in order to check the strength of local structures which withstand the wave slamming due to negative air gap. The wind load cannot be simulated easily by model test in towing tank whereas it can be simulated accurately in wind tunnel test. Furthermore, full scale simulation of the mooring system in model test is still a tuff work especially the stiffness of the mooring system. Owing to the above mentioned problem, the model test results are not accurate enough for air gap evaluation. The aim of this paper is to present sensitivity analysis results of air gap motion with respect to the mooring system and wind load for the design of semi-submersible platform. Though the model test results are not suitable for the direct evaluation of air gap, they can be used as a good basis for tuning the radiation damping and viscous drag in numerical simulation. In the presented design example, a numerical model is tuned and validated by ANSYS AQWA based on the model test results with a simple 4 line symmetrical horizontal soft mooring system. According to the tuned numerical model, sensitivity analysis studies of air gap motion with respect to the mooring system and wind load are performed in time domain. Three mooring systems and five simulation cases about the presented platform are simulated based on the results of wind tunnel tests and sea-keeping tests. The sensitivity analysis results are valuable for the floating platform design.     

Integrating volunteered smartphone data with multispectral remote sensing to estimate forest fuels

Volunteered data sources are readily available due to advances in electronic communications technology. For example, smartphones provide tools to collect ground-based observations over broad areas from a diverse set of data collectors, including people with, and without, extensive training. In this study, volunteers used a smartphone application to collect ground-based observations. Forest structural components were then estimated over a broader area using high spatial resolution RapidEye remote sensing imagery (5 spectral bands 440–850 nm, 5 m spatial resolution) and a digital elevation model following a three nearest neighbor approach (K-NN). Participants with professional forestry experience on average chose high-priority fuel load locations near buildings, while nonprofessional participants chose a broader range of conditions over a larger extent. When used together, the professional and nonprofessional observations provided a more complete assessment of forest conditions. A generalized framework is presented that utilizes K-NN imputation tools for estimating the distribution of forest fuels using remote sensing and topography variables, ensuring spatial representation, checking attribute accuracy, and evaluating predictor variables. Frameworks to integrate volunteered data from smartphone platforms with remote sensing may contribute toward more complete Earth observation for Digital Earth.     

山东省棚户区改造项目资金财政监管平台设计与应用

针对目前棚户区改造项目贷款审批和资金发放难于监管的特点,本文重点研究了将地理信息、遥感等技术应用于棚户区改造项目管理和资金监管,建立了时空数据一体化管理和项目动态监管模型,通过项目地理位置上报、历史影像对比、地理信息辅助审核等技术解决了棚改项目资金重复申报的问题和资金发放监管不到位的问题,依托于天地图山东丰富的地图数据资源,研发了山东省棚户区改造项目资金财政监管平台,建立了棚改项目上报、初审、现审、放款、监管、支付的一整套管理流程,实现全省棚改项目的空间化和实时监督管理。     

丰县国土资源综合应用平台的设计与实现

以"数字丰县"建设情况为背景,分析了当前国土资源办公需求,根据业务的需求与特点,选择采用基于Flex的WebGIS系统框架。探讨在Flex平台环境中构建丰县国土资源应用平台的方法和技术,平台对多样专题数据进行整合,实现了对土地资源的可视化管理。以丰县国土资源局为例,研究了国土资源应用平台系统在国土资源管理中的支撑作用,在一定程度上为国土资源管理信息化提供了较强的技术支持。     

基于多尺度公开版地图数据库的制图综合指标与模型的建立研究

以福建省公开版地图数据库为研究对象,建立1∶250 000、1∶500 000与1∶1 000 000等多尺度公开版地图数据库的制图综合规则。并以居民点和河流要素为例,建立各级比例尺下的选取指标和综合模型,通过综合前后曲线节点数变化、曲线长度比、位置误差及缓冲区限差等指标对河流要素综合结果进行质量评价,获得最适河流综合参数。     

关于测绘生产单位信息化测绘体系建设的思考

根据当前信息化测绘体系建设工作推进情况和存在的问题,本文提出了"信息化测绘体系建设=装备引进+资源整合+技术改造+系统建设+安全防护"的构想,构建动态、及时和按需的测绘生产和服务模式,进一步加强资源整合,强调了"人"的信息化的重要性和途径,详细阐述了测绘生产单位依托实际项目来持续改进建设工作的意见和建议。     

开放式位置态势系统设计与实现

位置态势是战场环境感知的重要内容,为辅助指战员高效地掌控战场位置态势,本文结合定位导航服务,设计了开放式位置态势系统框架。基于定位导航服务在军事中应用现状,探讨了位置态势系统构建的关键技术,结合北斗系统短报文功能,构建了位置报送网络;基于GIS插件式开发方法,提出开放式位置态势系统框架的设计原则,并设计了开放式位置态势系统框架和功能插件;结合军事地形学应用需求,构建了军事地形学野外训练考核系统,验证了该框架的可行性。     

基于地理国情要素的教育均等化空间统计分析——以云南省德宏州为例

地理国情监测是从地理的角度来综合分析和研究国情,可为政府、企业和社会各方面提供真实可靠、准确权威的地理国情信息服务。本文以云南省德宏州为例,基于地理国情要素和基础地理信息数据,采用空间分析和统计分析技术,探讨了地理国情监测要素在教育均等化研究中的应用。