共查询到20条相似文献，搜索用时 671 毫秒
1.
王乐洋 《大地测量与地球动力学》2012,32(5):48-52
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王乐洋 《大地测量与地球动力学》2013,33(1):40-44
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???????????????????????Jacobian???????????????????????????????С?????????????????????????С?????????????????????????в?????????С??ж?????????????????????2??????????????????仮??????????????????С??????????н???????????÷???????????????????????????????????????????????????????????????????????????????????????????????????????????С??????????????С?????? 相似文献
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??????????????(SVD,Singular Value Decomposition)????????????????????????????M-P??????????????????ó????????????????????????M-P??????;??????????????????????????С??????С?????????????????????????????????????????????????????????;?????????С??????С??????????????????????????????????????δ???????С??????С?????;????????????????????????????????????????????????Ч??? 相似文献
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����������С���˵ĵ��漤��ɨ������λ���� 总被引：5，自引：1，他引：4
????????????λ????С?????λ??????????????????????????漤?????????λ????????С????????λ???????????????????????????С??????????÷??????????????????????????????????????????????????????????С?????????С????????????????????????????????????????嶨λ??????? 相似文献
10.
王乐洋 《大地测量与地球动力学》2013,33(3):106-110
??????????С????????о???????(??)??????????????????????????????????????????????????????????????????????????????ü???λ??????????????(??)????????????С???????????????????????????????????м???в??????????????????????????м???????????????????????????????????????????????????С??????????????????????????????????????????????????????С???????????С?????????????????????????????????С????????о???????????????????Ч??? 相似文献
11.
????????С?????????γ?????????????????????????????????????С???????????????????MATLAB???????????????????????????????? 相似文献
12.
??????С????????????????????????????????????е??????????????????????????????????????????????????????????????С????????????????????????????·?????????????????????????????????????????????????????????????InSAR??λ???????????????????InSAR????????Ч??? 相似文献
13.
根据收集到的日照市海岸带浅地层剖面测量调查资料,把多条浅地层剖面中出露的古河道断面推测性地连接起来,重建了以往的古河道体系,综合分析了日照市海岸带古河道的分布特征。日照近海区域存在一个主干河道呈SW-NE走向的梳状河道网,古河道形成于距今约4.4万a的末次冰期。古河道的形成是河流的侵蚀、搬运、沉积及后期的海平面上升、潮汐改造等多种因素共同作用的结果。在末次冰期,研究区内气候湿润,河流流速较大,河流搬运泥沙的能力较强,长期侵蚀作用形成下切古河道,在古河道中容易形成淤积较多河流携带的砂体。古河道断面形态主要呈U形、V形、W形、箱形和倒梯形。主干河道北西侧,分支河道较密,南东侧分支河道较稀疏。主河道长约40km,横截面由南西向北东逐渐变宽,最宽处达4km。分支河道多数以NW向为主,少数为NE向,长度介于8~20km之间,宽度约为1~3km。古河道主要位于16~24m水深的闭合深度以外区域,对其中的砂体经过粒度筛选可作为将来进行人工抛沙的砂源。 相似文献
14.
基于Sentinel-1数据，提出一种基于多个干涉图闭合环的残差探测解缠误差方法。以形变量较大的墨西哥城区为实验场，分别采用不同的闭合环对同一个干涉对进行探测，结果具有较好的符合性。 相似文献
15.
计算GPS网中的同步环或异步环闭合差是检核GPS控制网测量精度的重要依据,手工方式费时又容易出错,而某些商业软件搜索闭合环存在一定的缺陷,无法搜索到所有的独立闭合环.为此,在构建Delaunay三角网的基础上,提出了一种新的GPS控制网同步环和异步环自动搜索算法.实验证明,该算法实现了GPS网中所有可能的同步环、异步环... 相似文献
16.
吴敏 《成都信息工程学院学报》2006,21(6):796-798
企业在不同地域或空间的分部通常对于企业的内部网络有一定的网络可靠性、结点移动性以及通信及时性的要求。目前的解决方案有专用网、虚拟专用网（VPN）和NTA等技术。但VPN以及NTA所做的都是基于某种中心服务器来构筑整个企业网的。文中所提出IP虚拟网是在对等的分支机构之间通过软路由机制来实现，这是从另一个角度来解决数据集中所导致的安全问题。 相似文献
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为分析网形结构对重力网平差结果的影响，利用北天山测网改造后的最新4期流动重力观测数据，分析测网中存在长支线对整网数据处理结果的影响。结果显示，长支线的存在使北天山最大异常变化达到260 μGal。将支线连成闭合环再进行平差计算，得到的最大重力变化量减小到60 μGal，表明测线上的误差积累导致支线末端测点重力值可靠性差，严重影响异常重力变化的识别。由于观测原因形成长支线时，为正确识别异常信息，采取适当的数据处理方法，将支线连接成闭合环，可以有效提高测网整体平差结果的可靠性。 相似文献
18.
An isopycnic-coordinate internal tide model and its application to the South China Sea 总被引：1，自引：0，他引：1
A three-dimensional isopycnic-coordinate ocean model for the study of internal tides is presented. In this model, the ocean interior is viewed as a stack of isopycnic layers, each characterized by a constant density. The isopycnic coordinate performs well at tracking the depth variance of the thermocline, and is suitable for simulation of internal tides. This model consists of external and internal modes, and barotropic and baroclinic motions are calculated in the two modes, respectively. The capability of simulating internal tides was verified by comparing model results with an analytical solution. The model was then applied to the simulation of internal tides in the South China Sea (SCS) with the forcing of M2 and K1 tidal constituents. The results show that internal tides in the SCS are mainly generated in the Luzon Strait. The generated M2 internal tides propagate away in three different directions (branches). The branch with the widest tidal beam propagates eastward into the Pacific Ocean, the most energetic branch propagates westward toward Dongsha Island, and the least energetic branch propagates southwestward into the basin of the SCS. The generated K1 internal tides propagate in two different directions (branches). One branch propagates eastward into the Pacific Ocean, and the other branch propagates southwestward into the SCS basin. The steepening process of internal tides due to shoaling effects is described briefly. Meridionally integrated westward energy fluxes into the SCS are comparable to the meridionally integrated eastward energy fluxes into the Pacific Ocean. 相似文献
19.
杨凯 《大地测量与地球动力学》2013,33(1):141-144
?????GNSS??????????????У????????????????????????????????????????????????????????????????????????????????????????????????????GNSS??????????????д??????????????????????????????????????????100????????????????????????????С???????????????????????????з????????????Ч???????????OPENMP??????????????????????淽??????????????????????????Ч??? 相似文献
20.
This study introduces the site selection and data processing of GNSS receiver calibration networks. According to the design requirements and relevant specifications, the authors investigate the observation conditions of the potential sites and collect the experimental GNSS observation data. TEQC is used to evaluate the data availability rate and multipath effects of the observation data to determine the appropriate site. After the construction and measurement of the calibration network, the baseline processing of the medium and long baseline network is conducted by GAMIT. The accuracy indexes including NRMS, difference between repeated baselines, and closure of independent observation loops all meet the specified criteria. 相似文献