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郑作亚  党亚民  卢秀山  阳凡林 《大地测量与地球动力学》2010,30(6):66-70

??CHAMP?????GPS????????????????GPS??????????????????λ??????????????Ч???GPS?????伸?η??????????????????????????????????????????????GPS???????С????LEO????????????????????????????????????????????仯??С???1~2 cm????????????????????????????GPS??????????????????5 ns??  相似文献   

���ڻ�׼վ������Ϣ��ʵʱ��̬���ܵ��㶨λ   总被引：1，自引：0，他引：1  

黄观文  涂锐  张勤  王利  李跃华  蔺玉亭 《大地测量与地球动力学》2010,30(6):135-139

??????????????????λ?????????????????????????????????????л????????????￡????????????????????????????????????λ????????????Ч?????????????????????????????????????????????????λ?????????????PPP???????涯?PPP??????????????????????????????????????λ????????  相似文献   

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赵丽华  张勤  王庆良 《大地测量与地球动力学》2010,30(6):37-41

??????????????????α?????GPS???ι???????????α?????????????????????????????????????????????????????????????????????????в??????????????????????????????????????????α???????????????????ι????????????α???????????????????Ч?????????????????????????????????Bayes?????????????????α?????????????????????????????????????????????????????????????????????????????????????????????Щ???????????????????????????????????????????????????GPS????????м??????????????????????????Ч???????????????????????????????????????  相似文献   

Density estimation of two-phase flow with multiscale and randomly perturbed data     

M. Presho  A. Målqvist  V. Ginting 《Advances in water resources》2010

In this paper, we describe an efficient approach for quantifying uncertainty in two-phase flow applications due to perturbations of the permeability in a multiscale heterogeneous porous medium. The method is based on the application of the multiscale finite element method within the framework of Monte Carlo simulation and an efficient preprocessing construction of the multiscale basis functions. The quantities of interest for our applications are the Darcy velocity and breakthrough time and we quantify their uncertainty by constructing the respective cumulative distribution functions. For the Darcy velocity we use the multiscale finite element method, but due to lack of conservation, we apply the multiscale finite volume element method as an alternative for use with the two-phase flow problem. We provide a number of numerical examples to illustrate the performance of the method.  相似文献   

山西地震台网“九五”与“十五”期间地震定位方法对比分析     

张蕙  梁向军  董春丽  张玲 《山西地震》2010,(4):17-26,39

选取山西地震台网2007年1月至2008年6月产出的数据,运用“十五”和“九五”两种定位系统的的定位软件进行处理,对比定位参数之间的差异。初步认为,山西台网“十五”期间的定位结果是可信的,与“九五”的定位结果差异不大。JOPENS系统的单纯型法是比较优的定位方法,适用于网内、网缘和网外的近震;HYP2000法适用于网内近震。  相似文献   

GPS地震观测台的多路径误差探讨     

杜历英  李建虎  王静 《华北地震科学》2010,28(3):24-27

通过分析多路径误差的产生机理,提出了一些测量中常用的消弱多路径误差的措施,并探讨了多路径误差与温度和气压之间的关系。重点研究固定台站多路径误差的性质,推断出此误差具有时间相关性,多路径误差这种相关性每天会延迟4 min。探讨这些性质有利于消弱多路径误差对GPS地震观测的影响。  相似文献   

恭城—栗木断裂带的应变特征与变形环境探讨     

隋志龙  王德银 《地震学刊》2010,(6):637-643

通过系统的有限应变测量与差异应力估算,探讨了恭城—栗木断裂带的应变特征与变形环境,以其推动该断裂带的研究向更深层次发展。结果表明：①付林指数K的变化范围为0.32～1.67;应变主轴平均方位为276°∠21°,与断裂带的整体逆冲方向基本一致;断裂带的平均应变程度为2.26～3.00,属中等应变程度;断裂带的应变类型属压扁型应变与单剪型平面应变的一种复合叠加类型。②断裂带的差异应力值为40～80 MPa,变形深度小于10 km,属半脆性—半韧性的变形域。③断裂带的应变特征与变形环境及宏观构造样式基本吻合。  相似文献   

水库冰气泡含量和密度对探地雷达测厚的影响分析(英文)   总被引：2，自引：0，他引：2  

李志军  贾青  张宝森  Lepporanta  Matti  卢鹏  黄文峰 《应用地球物理》2010,7(2):105-113

在水库现场试验了RIS K2型探地雷达探测水库冰厚度的能力,试验时所用天线频率为600MHz;同步钻孔测量雷达探测处的冰厚度;以及在一个点上取样测试分析冰晶体、冰内气泡和冰密度。试验时冰面积雪厚度0.03-0.05m,冰层上部有0.24m粒状冰,其下均为柱状冰;冰内气泡含量呈表层高底层低分布;冰密度随气泡含量变化;冰厚度在平面内不均一。通过探测厚度和实测厚度的对比分析以及气泡含量对介电系数影响的理论分析,建立了积雪、粒状冰和柱状冰三层介质模型,获取雷达波在冰内的理论传递时间。结果发现:能够利用等效介电常数或等效传播速度评价雷达波传递时间,结冰期冰层1/3深度处的对应介电常数或传递速度可以作为等效值;另外因冰内大气泡造成的理论传递时间大于雷达探测时间,其差值随理论传递时间或冰厚的增加呈非线性增加。  相似文献   

Estimation on Aesthetic Value of Tourist Landscapes in a Natural Heritage Site： Kanas National Nature Reserve, Xinjiang, China   总被引：1，自引：0，他引：1  

Feng Di  Zhaoping Yang  Xuling Liu  Jingrui Wu  Zhongguo Ma 《中国地理科学(英文版)》2010,20(1):59-65

Most world natural heritage sites are designated partly by reason of their prominent aesthetic values in accordance with Article Ⅶ of World Natural Heritage Convention.In this paper, the aesthetic values of Kanas National Nature Reserve, which has potential for such designation, was analyzed quantitatively using scenic beauty estimation(SBE).The landscapes of 19 representative scenic spots in the Kanas National Nature Reserve in summer and autumn were selected as the objects of evaluation.The contributions of different landscape factors to the aesthetic value of the Kanas National Nature Reserve were revealed using a multivariate quantitative model.The main factors affecting the aesthetic value were waterscapes, vegetation, mountains, folk culture and the tourist environment.The t-test and F-test results are extremely significant.According to the results, some suggestions were given for conserving the landscapes in the Kanas National Nature Reserve.  相似文献   

量子理论中一个定理的随机推广     

欧谦宁 《成都信息工程学院学报》2010,25(2):223-225

随机情况下的量子理论有着更广泛的实际应用,所以利用数学期望将量子理论中的一个重要定理在随栅隋况下作了推广,证得这个定理对随机自相似集也成立,这对进一步研究随机自相似集的量子维数和量子误差提供了理论依据,丰富了量子理论．  相似文献