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First Break of the Seismic Signals Based on Information Theory

Aug 26, 2016 08/16

Aug 26, 2016

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For the seismic data with low SNRs, the first arrival automatic picking method is very important but difficult. In the paper, we proposed a new method based on the mutual information in information theory. The mutual information between signals and noises is zeros, thus random noises have less effects on first arrivals pickup. The paper compares the principle of STA/LTA, AIC, fractal dimension of three kinds with the proposed method for seismic data first–break picking method, and at the same...
Topics: Seismic Data, First Arrivals, Pickup, Information Theory, Mutual Information

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Web-oriented Data Formats and Their Management in the Mobile Era

Aug 26, 2016 08/16

Aug 26, 2016

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Future Internet envisages a global network of Internet-enabled objects, in most cases mobile and wireless nodes, mainly accessible through web standards. This network connection implies a big flux of data through mobile devices and wireless networks, most of which are unstructured. Such data need to be structured, collected and/or organized in web-oriented formats to be published within every web framework and managed by a backend database structure. Focusing on the handling of digital...
Topics: Web-oriented Data Formats, XML, JSON, RDFa, Metadata, Microformats, Microdat, HTML5, DBMS, NoSQL,...

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Dymanic Data Prefetching with Prediction-by-partial Match Approach for Route Guidance

Aug 26, 2016 08/16

Aug 26, 2016

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Mobile devices can provide the user location-dependent information services (LDISs), enhanced by prefetching the related information along with the route guidance based on user mobility mode. The current prefetching approaches are based on static assignments of probabilities of changing directions, hence the overall cache-miss for users are not reduced by the mobilities of the individuals. In this paper, we adopt the Prediction-by-Partial Match (PPM) technology to predict the best possible...
Topics: Cache-miss, Data Prefetching, Location-depedent Information Services, Pediction-by-particail Match,...

Community Texts

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Decomposition of Symmetry Using Cumulative Sub-Asymmetry Model for Square Contingency Tables

Aug 26, 2016 08/16

Aug 26, 2016

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For square contingency tables with ordered categories, the present paper gives the theorem that the symmetry model holds if and only if four models of (1) cumulative sub-asymmetry, (2) palindromic symmetry, (3) global symmetry, and (4) marginal means equality, hold simultaneously. It analyzes some data using this decomposition.
Topics: Ordinal Data, Palindromic Symmetry, Separation

Community Texts

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Gap-Measure Tests with Applications to Data Integrity Verification

Aug 26, 2016 08/16

Aug 26, 2016

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In this paper we propose and examine gap statisics for assessing uniform distribution hypotheses. We provide examples relevant to data integrity testing for which max-gap statistics provide greater sensitivity than chi-square , thus allowing the new test to be used in place of or as a complement to testing for purposes of distinguishing a larger class of deviations from uniformity. We establish that the proposed max-gap test has the same sequential and parallel computational complexity as and...
Topics: Hypothesis Testing, Distribution Testing, Chi-Square Testing, Data Integrity, Big Data, Gap...

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A New Model for Internal Migration Estimation Based on Formal Records in Databases

Aug 26, 2016 08/16

Aug 26, 2016

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Migration rate is a piece of critical information in social studies. It seems that other methods, rather than census which can perform better in costs and data updating, are more preferable. The purpose of this study was to investigate the estimation methods for internal migration based on formal information existing in databases which government can access and control; as well to propose solutions for accurately estimating integrated internal migration with the county resolution. The data...
Topics: Internal Migration, Statistical Estimation, Records Data, Census

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Understanding Tier 3 Data Center

Aug 26, 2016 08/16

Aug 26, 2016

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The different level of data center signifies the ease of maintenance and failure management. Depending upon their needs users can opt from these four levels. Power management and the backup facility is well facilitated with tier 3 data center.
Topic: Tier 3 data center

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Effect Size Calculation in Power Estimation for the Chi-square Test of Preliminary Data in Different Studies

Aug 26, 2016 08/16

Aug 26, 2016

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The validity of statistical analyses applied to identify different factors in many fields depends upon the use of appropriate sample sizes, the lack of which reduces the power of the findings. However, the number of cases collected for data analysis in medical studies is generally limited, for medical, financial and other experimental reasons, and statistical tests are often carried out without power and sample size estimation. Power analysis involvesseveral parameters, the most importantof...
Topics: Frequency Data, Contingency Table, Preliminary Study, Effect Size, Statistical Power Estimation,...

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Pattern Recognition Options to Combine Process Monitoring and Material Accounting Data in Nuclear Safeguards

Aug 26, 2016 08/16

Aug 26, 2016

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Nuclear material accounting (NMA) is a component of nuclear safeguards, which are designed to deter and detect illicit diversion of special nuclear material (SNM) from the peaceful fuel cycle to a weapons program. NMA consists of periodically, but at relatively low frequency, comparing measured SNM inputs to measured SNM outputs, and adjusting for measured changes in inventory. Process monitoring (PM) is a relatively recent component of safeguards that consists of data more frequently collected...
Topics: Data-driven Hypothesis Testing, Mixture Distribution, Pattern Recognition, Sequential Testing

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Ecosystem Monitoring and Port Surveillance Systems-Using Passive & Active Acoustics and Data Fusion

Aug 25, 2016 08/16

Aug 25, 2016

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In this project, we should build up a novel system able to perform a sustainable and long term monitoring coastal marine ecosystems and enhance port surveillance capability. The outcomes will be based on the analysis, classification and the fusion of a variety of heterogeneous data collected using different sensors (hydrophones, sonars, various camera types, etc). This manuscript introduces the identified approaches and the system structure. In addition, it focuses on developed techniques and...
Topics: Underwater Ecosystem, Passive and Active Acoustics, Signal Processing, Blind Source Separation,...

Community Media

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Recover Data

Aug 24, 2016 08/16

Aug 24, 2016

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Recover Data
Topic: Recover Data

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