辽宁率先全域使用卫星遥感数据

日前,辽宁省国土资源厅获国土资源部科技与国际合作司和部航空遥感中心批准,将在辽宁全域使用"资源一号"02C卫星遥感数据和高分一号卫星数据,常年为土地调查评价、地质勘查、地质环境、执法监察、矿山环境治理等公益性工作提供卫星遥感数据服务。辽宁成为全国首个免费获得2颗卫星遥感数据的省份。据了解,"资源一号"02C卫星是一颗填补中国国内高分辨率遥感     

基于高分辨率卫星影像的违章建筑监测及时空分析

中国的城市化水平不断提高,与此同时,违章建筑也不断涌现,给城市监管带来了很大的难题。本文以长沙市城市建筑区为例,利用高分辨率卫星影像结合大比例尺地形图以及建筑规划定位图等多源数据,提取了两年来长沙市违章建筑图斑,并分析了违章建筑的时空发展规律,为城市监管提供了参考。     

基于MAEU-CNN的高分辨率遥感影像建筑物提取

从高空间分辨率图像（HSRI）中提取建筑物信息在遥感应用领域具有重要意义。然而,由于遥感影像中的建筑物尺度变化大、背景复杂和外观变化大等因素,从HSRI中自动提取建筑物仍然是一项具有挑战性的任务。特别是从影像中同时提取小型建筑物群和具有精确边界的大型建筑物时,难度更大。为解决这些问题,本文提出了一种端到端的编码器-解码器神经网络模型,用于从HSRI中自动提取建筑物。所设计的网络称为MAEU-CNN(Multiscale Feature Enhanced U-shaped CNN with Attention Block and Edge Constraint)。首先,在设计的网络编码部分加入多尺度特征融合（MFF）模块,使网络能够更好地聚集多个尺度特征。然后,在编码器和解码器部分之间添加了多尺度特征增强模块（MFEF）,以获得不同尺寸的感受野,用于获取更多的多尺度上下文信息。在跳跃连接部分引入双重注意机制,自适应地选择具有代表性的特征图用于提取建筑物。最后,为了进一步解决MAEU-CNN中由于池化及卷积操作导致的分割结果边界模糊的问题,引入多任务学习机制,将建筑物的边界几何信息融入网络...     

高分辨率层序分析在油藏开发工程中的应用--以百色盆地仑35块那二段油藏为例

以高分辨率层序地层学理论为指导思想,通过地表露头、钻井岩芯、测井资料和地震剖面的综合研究,较为详细地分析了百色盆地子寅油田仑 35块下第三系那读组二段不同级次基准面旋回界面和湖泛面的成因类型及高分辨率层序地层学特征,从那二段湖底浊积扇-半深湖沉积体系中划分出 1个长期、2个中期、7～ 9个短期和 13～ 18个超短期旋回层序。在此基础上,分别讨论了各级次旋回层序的沉积序列、结构类型、叠加样式和分布模式,建立了以中期旋回层序为框架,以短期和超短期旋回层序为等时地层对比单元的地层格架,探讨了该理论体系及其技术方法在油气藏开发工程中的应用前景。     

王府凹陷扶余油层的高分辨率层序地层及沉积特征研究

王府凹陷扶余油层河道砂体发育,地层等时划分对比存在较大难度。以高分辨率层序地层学原理为指导,依据岩心、录井和测井等资料对王府凹陷扶余油层各级次基准面旋回进行划分、对比和沉积特征分析,将其划分为2个中期（MSC1、MSC2）、6个短期（SSC1~SSC6）和17个超短期基准面旋回（FIII5~FI1）,并建立层序地层对比...     

A novel high resolution model without open boundary conditions applied to the China Seas: first investigation on tides

We developed a Global Ocean Circulation and Tide Model (GOCTM) with coarse grids in the open deep ocean degrading ‘smoothly’ into the highly resolved China Seas (CS) of refined grids to study the tides and circulation there.GOCTM is based on the framework of the Finite Volume approach for better mass conservation through improved transports across the discrete individual control volume.It also takes a full advantage of the geometric flexibility of unstructured mesh using a realistic global topography including the Arctic Ocean.The CS are given a special focus by refining the unstructured grids,but they are embedded into global domain naturally.Furthermore,GOCTM not only successfully avoids the treatment of the open boundaries,but also optimizes the trade-off between computational cost and model accuracy.Meanwhile,GOCTM is driven by the astronomical tide-generating potential and the secondary tide-generating potential directly,together with the wind stress and heat flux.GOCTM succeeds in reproducing the global eight principal tidal harmonic constants.Particularly,the simulated tidal results in the CS are improved compared to some other regional models with the discrepancy of 3.9 cm for M 2 tide.This idea of GOCTM can also be referred for other regional ocean study.     

高分辨率地震勘探确定隐伏地质构造方法研究

对于确定埋藏较浅的煤田隐伏地质构造,近年来发展起来的高分辨率地震勘探方法,由于其分辨率高、精度高、成本相对较低而受到广泛关注。本文提出了采区高分辨率地震勘探中信息采集、资料处理及解释方法的基本原则,并以某采区的实例,表明了高分辨率地震勘探方法确定采区隐伏构造的效果。     

Spatiotemporal Variations of Cloud Amount over the Yangtze River Delta, China

Based on the NOAA's Advanced Very High Resolution Radiometer(AVHRR) Pathfinder Atmospheres Extended(PATMOS-x) monthly mean cloud amount data, variations of annual and seasonal mean cloud amount over the Yangtze River Delta(YRD), China were examined for the period 1982–2006 by using a linear regression analysis. Both total and high-level cloud amounts peak in June and reach minimum in December, mid-level clouds have a peak during winter months and reach a minimum in summer, and lowlevel clouds vary weakly throughout the year with a weak maximum from August to October. For the annual mean cloud amount, a slightly decreasing tendency(–0.6% sky cover per decade) of total cloud amount is observed during the studying period, which is mainly due to the reduction of annual mean high-level cloud amount(–2.2% sky cover per decade). Mid-level clouds occur least(approximately 15% sky cover) and remain invariant, while the low-level cloud amount shows a significant increase during spring(1.5% sky cover per decade) and summer(3.0% sky cover per decade). Further analysis has revealed that the increased low-level clouds during the summer season are mainly impacted by the local environment. For example,compared to the low-level cloud amounts over the adjacent rural areas(e.g., cropland, large water body, and mountain areas covered by forest), those over and around urban agglomerations rise more dramatically.     

中等贫金属星高分辨率光谱分析Ⅱ.化学元素丰度

在第1篇论文的基础上，确定了样本星的恒星大气参数，得到这些星中9种元素的丰度。讨论了各种元素丰度随[Fe/H]的变化。平均的[Na/Fe]～－0．01dex，接近于太阳丰度。α元素Si和Ca具有几乎相同的丰度模式，而[Ti/Fe]弥散较大，但三者均有随[Fe/H]的减小而增加的趋势。铁峰元素V、Cr、Ni在不同丰度处有较大的弥散，[Cr/Fe]在所有样本星中均表现超丰；而[Mn/Fe]却明显过贫，且随金属丰度的增加而增加。     

Measurements of the Ca II infrared triplet lines of young stellar objects

Equivalent widths and line widths of Ca II infrared triplet emission lines were measured in the high-resolution optical spectra of 39 young stellar objects.We found that the equivalent widths of the emission lines decrease with stellar evolution.It has often been claimed that strong chromospheric activity is generated by a dynamo process caused by fast rotation of the photosphere.However,we found no clear correlation between the strength of the Ca II lines and the stellar rotation velocity.Instead,we found that the objects with high mass accretion rates had stronger Ca II emission lines.This correlation supports the turbulent chromosphere model or the magnetic accretion theory for classical T Tauri stars.We also noticed that the equivalent widths of Ca II lines in transitional disk objects are one-tenth of those in classical T Tauri stars,even if the masses of the circumstellar disks are comparable.