Abstract:In order to scientifically and accurately describing the shape of deviation distribution curve of the short-level segment data of seismostation, this paper used deviation coefficient and sliding time window to analyze and summarize trends of deviation distribution curves of 2-3(k) segment of Chaoyang seismostation quantitatively before and after Chaoyang M4.6 and M4.3 earthquakes on May 22, 2016: general data anomalies caused by crustal deformation reveal the deviation coefficients get larger and the shapes of deviation distribution curves of the segment deviate from normal distribution before the earthquake, and the deviation coefficients get smaller and the shapes of deviation distribution curves of the segment restore to normal distribution after the earthquake. Then preliminary analysis of earthquake risk near the seismostation was made based on recent data. As a result, the figures prove that this quantitative analysis method has reference valuable for data anomalies recognition before earthquake to a certain extent, which also provides a new way of research for earthquake monitoring and prediction analyzing.

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	1. A method of quantitative analysis based on deviation coefficient and sliding time window
	ZHANG Zhanyang,YANG Guohua,SUN Qikai,ZHANG Junqing,HE Yadong
	Surveying and Mapping Technology 27 December 2019
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	Abstract:In order to scientifically and accurately describing the shape of deviation distribution curve of the short-level segment data of seismostation, this paper used deviation coefficient and sliding time window to analyze and summarize trends of deviation distribution curves of 2-3(k) segment of Chaoyang seismostation quantitatively before and after Chaoyang M4.6 and M4.3 earthquakes on May 22, 2016: general data anomalies caused by crustal deformation reveal the deviation coefficients get larger and the shapes of deviation distribution curves of the segment deviate from normal distribution before the earthquake, and the deviation coefficients get smaller and the shapes of deviation distribution curves of the segment restore to normal distribution after the earthquake. Then preliminary analysis of earthquake risk near the seismostation was made based on recent data. As a result, the figures prove that this quantitative analysis method has reference valuable for data anomalies recognition before earthquake to a certain extent, which also provides a new way of research for earthquake monitoring and prediction analyzing.
	TO cite this article:ZHANG Zhanyang,YANG Guohua,SUN Qikai, et al. A method of quantitative analysis based on deviation coefficient and sliding time window[J].


	2. Secure service model for remotely sensed data in cloud computing
	Xu Zhengquan,Xiong Lizhi
	Surveying and Mapping Technology 16 May 2016
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	Abstract:Remotely sensed data sharing services are attracting more and more attention. Advanced cloud computing technologies provide huge storage and efficient support for remotely sensed big data services. However, the security of stored remotely sensed data and usage security in the cloud computing environment have become urgent issues. To address these problems we propose a secure model for remote sensing images (RSIs) in the cloud computing environment. The proposed model not only ensures RSI security without relying on the trustworthiness of cloud servers, but also protects RSI copyrights. Theoretical analysis confirms the correctness of the proposed encryption model and justifies the security of the proposed scheme.
	TO cite this article:Xu Zhengquan,Xiong Lizhi. Secure service model for remotely sensed data in cloud computing[OL].[16 May 2016] http://en.paper.edu.cn/en_releasepaper/content/4691102

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	3. Noise Analysis of GPS Coordiante Time Series
	LI Lihua
	Surveying and Mapping Technology 10 November 2015
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	Abstract:The noise property not only affects the accuracy of the parameter estimation, but also reflects the various driving factors of the environment. Therefore, the noise model is the basis of designing the optimal parameter estimation, and it is also the premise of various geometric, physical, and other parameters based on the observation data. Noise analysis is very important in the data processing. The noise property of the GPS coordinate time series has been explored in detail in this paper. Because of the electronic GPS receiver collecting data with high sampling rate, colored noise arise in the GPS coordinate time series. The methods of determining the stochastic model of GPS coordinate noise are discussed in detail. The results show that the GPS real-time measurement deviations have a high autocorrelation, which should be considered in the GPS high-precision positioning.
	TO cite this article:LI Lihua. Noise Analysis of GPS Coordiante Time Series[OL].[10 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4661034


	4. An integrated GIS application system for soil moisture data assimilation
	WANG Di,SHEN Runping
	Surveying and Mapping Technology 16 July 2014
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	Abstract:The gaps in knowledge and existing challenges in precisely describing the land surface process make it critical to represent the massive soil moisture data visually and mine the data for further research.This article introduces a comprehensive soil moisture assimilation data analysis system, which is instructed by tools of C#, IDL, ArcSDE, Visual Studio 2008 and SQL Server 2005. The system provides integrated service, management of efficient graphics visualization and analysis of land surface data assimilation. The system is not only able to improve the efficiency of data assimilation management, but also comprehensively integrate the data processing and analysis tools into GIS development environment. So analyzing the soil moisture assimilation data and accomplishing GIS spatial analysis can be realized in the same system. This system provides basic GIS map functions, massive data process and soil moisture products analysis etc. Besides,it takes full advantage of a spatial data engine called ArcSDE to effeciently manage, retrieve and store all kinds of data. In the system, characteristics of temporal and spatial pattern of soil moiture will be plotted. By analyzing the soil moisture impact factors, it is possible to acquire the correlation coefficients between soil moisture value and its every single impact factor. Daily and monthly comparative analysis of soil moisture products among observations, simulation results and assimilations can be made in this system to display the different trends of these products. Furthermore, soil moisture map production function is realized for business application.
	TO cite this article:WANG Di,SHEN Runping. An integrated GIS application system for soil moisture data assimilation[OL].[16 July 2014] http://en.paper.edu.cn/en_releasepaper/content/4603271


	5. The application of robust estimation in coordinate transformation
	ZHANG Heming,WANG Zhongyuan
	Surveying and Mapping Technology 25 August 2011
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	Abstract:Gross errors in data processing will have great impact, providing a robust estimation to eliminate and reduce measurement errors in the estimation of gross errors on the interference and influence, solving the best valuation method. In this paper, a modern adjustment theory discussed robust estimation theory, the coordinate precision is low in the public or the case of error is too large to obtain high-precision coordinate transformation method. Were using a different anti-difference weighting function for data inspection, data obtained through comparisons of the methods for obtaining high-precision coordinates.
	TO cite this article:ZHANG Heming,WANG Zhongyuan. The application of robust estimation in coordinate transformation[OL].[25 August 2011] http://en.paper.edu.cn/en_releasepaper/content/4440684


	6. Assessment of phase unwrapping approaches
	Fu Tuo,Zhangshubi
	Surveying and Mapping Technology 25 April 2011
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	Abstract:With GAMMA software, VC++ and MATLAB coding implementing six kinds of phase unwrapping approaches ,this paper presents the best method for different situations through two sets of experimental results used for analysing and comparing run time and precision. In the plain and alpine area, the best phase unwrapping methods are separately Goldstein branch-cut method and Minimum Cost Network Flow method.
	TO cite this article:Fu Tuo,Zhangshubi. Assessment of phase unwrapping approaches[OL].[25 April 2011] http://en.paper.edu.cn/en_releasepaper/content/4423962


	7. Applying Internet Multimedia to Tourism Industry
	Pei Qian ,Wu Kan ,Chang Xinpan
	Surveying and Mapping Technology 15 December 2009
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	Abstract:There has been a rapid growth of using multimedia in computer-assisted mapping systems to develop interactive, analytic web maps for the past two decades. This paper reports an explanatory study of applying Internet multimedia cartography to tourism industry. A 3D landscape model was built by Google SketchUp and then exported into Google Earth as Keyhole Markup Language (KML) files. This kind of model can be widely used to help potential tourists to explore the world on the internet and decide if it is the right place they will choose for their trips. Customizations could be done without and with programming to personalize their own maps in the purpose of planning trips. A GPS embedded electronic tour guide-handheld device would be developed to help tourists on route with all kinds of information. These three aspects lead to a conclusion that Internet Multimedia Cartography plays an important role in tourism industry.
	TO cite this article:Pei Qian ,Wu Kan ,Chang Xinpan . Applying Internet Multimedia to Tourism Industry[OL].[15 December 2009] http://en.paper.edu.cn/en_releasepaper/content/37589


	8. A flow to generate DEM from Lidar data
	Lai Xudong,Zheng Xuedong,Jiang Junwei
	Surveying and Mapping Technology 01 July 2009
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	Abstract:To consume less time and less memory, this paper presents a flow to generate DEM from Lidar data. Firstly the flow labels non-ground points based on multi-echo information. Secondly by the relativity among neighbor points, the flow labels many other non-ground points. After these two up-to-down steps, many non-ground points have been eliminated, which has reduced the amount of the Lidar points successful. At last, the flow use filtering arithmetic based on scan lines to get DEM. This paper comes to a conclusion that both the flow and algorithm are feasible by using them to disposing laboratory data.
	TO cite this article:Lai Xudong,Zheng Xuedong,Jiang Junwei. A flow to generate DEM from Lidar data[OL].[ 1 July 2009] http://en.paper.edu.cn/en_releasepaper/content/33552


	9. Application of wavelet analysis in signal de-noising
	Lv Lilei,Gong Wei,Song Shalei,Zhu Bo ,Zhang Daoxi
	Surveying and Mapping Technology 03 April 2009
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	Abstract:In this paper, a novel lidar system has been proposed and developed using two low power laser to make horizontal-path laser measurement of vegetation. We focus on the de-noising process of this new sensor by using wavelet analysis, and the experiments have been down to testify this theory, the results also show its validity in active laser detection.
	TO cite this article:Lv Lilei,Gong Wei,Song Shalei, et al. Application of wavelet analysis in signal de-noising[OL].[ 3 April 2009] http://en.paper.edu.cn/en_releasepaper/content/31063


	10. Deformation Measurement on the Oresund Link
	HE Wei
	Surveying and Mapping Technology 16 January 2009
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	Abstract:In this paper, the deformation survey method on the Oresund Bridge is stated in details. In first part of this report, some general information about this striking project is given. The survey methodologies and calculation process as well as a comparison of survey results carried out by two construction teams are also involved in this report. Then, three methods that are usually used in deformation surveys will be explicit, and a discussion about the most suitable one that can apply to the project in reality is followed.
	TO cite this article:HE Wei. Deformation Measurement on the Oresund Link[OL].[16 January 2009] http://en.paper.edu.cn/en_releasepaper/content/28001

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