共查询到20条相似文献，搜索用时 140 毫秒
1.
GPS��InSAR��ʾ��ʲ���ݼ������Ĵ�ֱ�˶��빹������ 总被引：2，自引：0，他引：2
??????????10????GPS??λ???200??2003??2007????SAR?????????InSAR???????????????????????????????????????????????????????????????????????????????????????????????????????????????磬????????????????磬???????????????Χ???????????????α??????3????????1 mm/a, ???????????????Χ????????????1 mm/a,??????????????????С??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????,?????????????????1~-1.5 mm/a???????????????п??????????壬???????????????????????????????????????α??????????????????????????????????????????????????? 相似文献
2.
?????????????????DInSAR???????????????????????????????????á?????????壨PS?????????????Ч??????????????????????????SAR???????????С???????SBAS????????SAR???????????У???????????????о??????????2008??1???2010??8??????8??ENVISAT?????SAR?????????SBAS??????????????????α???????????????????С???????α????????-27.11????-55.92????-67.61 mm/a????????α?????????α???????????????????￡?????????SBAS?????????е???α???????? 相似文献
3.
???????????????ζ???????????????????????????ζ?????????????????????????????????????????????????????У?????????????????????????????????????λ?????????С???????????????У?????????????????????????С???????????????????????С???仯???????????????? 相似文献
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??????????????????????????????????С???????????????????????????????????????????????????????????????????????????????????????С???????????????????????????????????????????????????????淽?????????????λ???????С??????????????? 相似文献
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����������С���˷��� 总被引：1，自引：0，他引：1
???????е???????????????к??д??????????????????????С?????????????M???????????????????????С??????????в??????????????в??????????????????????????????????????С?????????????????С?????????????????м?????????????÷??????????? 相似文献
7.
������С���˷�������ά����ת���е�Ӧ�� 总被引：9，自引：4，他引：5
????о???????С???????????С????????????С????????????????е???????????????????????????????У??????????????????μ?????????????????????????????????С???????????????е????????A??????????b??????????????????????????????????????????LS????????????????С?????????????????????????????????? 相似文献
8.
��������ƹ�������С�ⷨ�ĵ�ͼ����任 总被引：1，自引：1，他引：0
????????????????С????????????????????????????????????????????????????ú???????????????в????????????Э???????????????????????????????????????÷???????????任?е????,???????????????????С?????????????????????????С????????? 相似文献
9.
����һ��֧��������̽��GPS�ز���λ������ 总被引：3，自引：1，他引：2
???????????????С??????????????????????????????????????????????????????????????????????????????????GPS?????λ????????е?С????????????????????????????????????????????????????????????GPS?????λ??0.5???С??С???????÷??????????????????????Ч?????????????????????? 相似文献
10.
王乐洋 《大地测量与地球动力学》2012,32(6):81-85
????????????????????????????????????????????????????????????????????????????????????μ???????С???????????????t???????????????????????????????????С???????????????????????????????????÷???????Ч????????? 相似文献
11.
??L P ????????￡?????????λ???????????????????о?????????????3???????????????????????Bam?????????SAR??????????????????????????:Goldstein?????????Ч???????е??????????,??????????????Ч??????????????????????L 1?????????????????????????????Ч?????L 2?????????????????????????Ч?????L 0???????????????????????????????????????????????????????? 相似文献
12.
基于制造业企业网络视角的城市网络核心—边缘结构的研究将加深对城市网络演化规律的理解。利用2020年中国制造业500强企业网络数据和隶属联系模型构建城市网络,研究了中国城市网络核心—边缘结构的演化特征,定量测度了核心—边缘结构的影响因素,并根据国际生产折衷理论解析了城市网络地位分异的动力机制。研究发现: 2005—2020年,核心区块的城市数量逐渐增加,主要由直辖市、经济特区以及东、中部地区的省会城市组成,这些城市通过互惠性的链接关系形成了凝聚子群,网络权力较为集中;边缘区块的城市则主要位于中、西部地区,城市间经济联系相对稀疏,整体网络结构并不稳定,城市的发展受到了网络资本的约束。关键资源、基础设施和区位优势是影响中国城市网络地位的决定性因素,择优选择、网络邻近和路径依赖构成了中国城市网络核心—边缘结构演化的动力机制,这将进一步增强核心城市的网络地位。在网络环境下,城市间的差距趋于扩大,城市网络地位的提升取决于城市在网络中的影响力,中国城市化政策需要做出相应调整。 相似文献
13.
矿产资源展望与西部大开发 总被引：8，自引：1，他引：7
陈毓川 《地球科学与环境学报》2006,28(1):1-4
对世界上以及中国的矿产资源现状进行了研究,并且从国内外矿产资源形势和世界各国社会经济发展对矿产资源需求趋势方面展望了未来。认为要保证全球经济发展的需要就要公平、合理、科学地配置全球矿产资源;就要切实部署与实施可再生能源、可接替能源、新型矿产资源及替代矿产资源的寻找与开发;就要将新的科学技术应用于矿产资源勘查、开发、利用领域。中国西部地区矿产调查勘查程度很低,但成矿条件很好,有很大的找矿余地。因此,在实施西部大开发战略中,应把西部地区建成中国能源、矿产资源的主要接替区。 相似文献
14.
本文分析了西部地区的崩塌、滑坡、泥石流等边坡地质环境灾害产生的背景、特征和变异态势 ,对西部开发中边坡地质环境保护与可持续发展提出了建议。 相似文献
15.
在InSAR干涉图数据处理过程中,通常会由于轨道参数不准确而导致去平地效应后,干涉图中仍残留部分线性相位。为避免线性趋势对数据处理结果精度的影响,提出了一种基于干涉图条纹频率检测的去除线性趋势精化方法：首先,通过Chirp Z变换精化干涉图条纹频率估计,计算出精确到0.1的线性相位条纹数;然后,模拟线性相位并从干涉图中去除。利用通过模拟和真实数据对提出的方法进行验证分析,实验结果表明：该方法能够更加彻底地去除干涉图中残留的线性趋势,对提高InSAR技术的监测精度具有一定意义。 相似文献
16.
介绍了2013~2014中国大陆构造环境监测网络的基本情况及西部地区绝对重力观测的情况,并对观测结果进行分析。结果表明,成果稳定性良好,89.5%的成果观测精度优于±5.00μGal,能够满足"陆态网络"的技术要求。 相似文献
17.
轨道误差是InSAR数据处理中的一个重要因素,对从最初的图像配准到最后的高程值或形变值图像的生成都有着重要影响。含有误差的轨道参数造成基线误差以残差条纹的形式存在于干涉图中。本文利用4个条带的61景PALSAR升轨数据,通过InSAR干涉测量得到覆盖2011日本Tohoku地震的雷达视线向的地表同震位移场。通过联合GPS同震位移数据,采用二次多项式曲面拟合的方法去除InSAR同震形变数据中的卫星轨道误差,并分析雷达入射角变化对轨道误差去除的影响。对干涉图中拟合残差进行分析,改正后的InSAR同震形变场精度得到较大提高。 相似文献
18.
ENSO cycle and climate anomaly in China 总被引：2，自引：0，他引：2
The inter-annual variability of the tropical Pacific Subsurface Ocean Temperature Anomaly (SOTA) and the associated anomalous atmospheric circulation over the Asian North Pacific during the El Ni o-Southern Oscillation (ENSO) were investigated using National Centers for Environmental Prediction/ National Center for Atmospheric Research (NCEP/NCAR) atmospheric reanalysis data and simple ocean data simulation (SODA). The relationship between the ENSO and the climate of China was revealed. The main results indicated the following: 1) there are two ENSO modes acting on the subsurface tropical Pacific. The first mode is related to the mature phase of ENSO, which mainly appears during winter. The second mode is associated with a transition stage of the ENSO developing or decaying, which mainly occurs during summer; 2) during the mature phase of El Ni o, the meridionality of the atmosphere in the mid-high latitude increases, the Aleutian low and high pressure ridge over Lake Baikal strengthens, northerly winds prevail in northern China, and precipitation in northern China decreases significantly. The ridge of the Ural High strengthens during the decaying phase of El Ni o, as atmospheric circulation is sustained during winter, and the northerly wind anomaly appears in northern China during summer. Due to the ascending branch of the Walker circulation over the western Pacific, the western Pacific Subtropical High becomes weaker, and south-southeasterly winds prevail over southern China. As a result, less rainfall occurs over northern China and more rainfall over the Changjiang River basin and the southwestern and eastern region of Inner Mongolia. The flood disaster that occurred south of Changjiang River can be attributed to this. The La Ni a event causes an opposite, but weaker effect; 3) the ENSO cycle can influence climate anomalies within China via zonal and meridional heat transport. This is known as the "atmospheric-bridge", where the energy anomaly within the tropical Pacific transfers to the mid-high latitude in the northern Pacific through Hadley cells and Rossby waves, and to the western Pacific-eastern Indian Ocean through Walker circulation. This research also discusses the special air-sea boundary processes during the ENSO events in the tropical Pacific, and indicates that the influence of the subsurface water of the tropical Pacific on the atmospheric circulation may be realized through the sea surface temperature anomalies of the mixed water, which contact the atmosphere and transfer the anomalous heat and moisture to the atmosphere directly. Moreover, the reason for the heavy flood within the Changjiang River during the summer of 1998 is reviewed in this paper. 相似文献
19.
《山地科学学报》2020,17(9):2262-2279
Located in the western hinterland,Southwest China is a typical mountainous area covered by plateaus, mountains and hills. Its ruggedness hinders regional internal and external connections, and its poor transportation infrastructure has long constrained the socioeconomic development of Southwest China. Based on the GIS transportation database, this paper explored the spatiotemporal evolution and characteristics of the land transportation networks and the accessibility of Southwest China from 1917 to 2017. Regional accessibility in Southwest China has significantly improved, and transportation infrastructure has gradually integrated the transportation circles of the52 central cities. The transportation network has followed an evolutionary process from a "hub-spoke pattern" to a "network pattern", while the construction of a high-speed railway(HSR) has brought about significant spatial polarization. We argue that innovation in transportation technology is one of the most effective factors for promoting a significant change in regional accessibility. In addition, the spatial distribution and evolution of accessibility in Southwest China presents a verticalcharacteristic that distinguishes it from the plains, as the spillover effects of new transportation infrastructure on accessibility improvement are partly offset by the mountainous terrain. Additionally, in Southwest China, there is significant "path dependence" in the evolution of the transportation network, since a large portion of the population is concentrated along transportation corridors in mountainous areas. 相似文献
20.