advanced big data analysis

... and the third is the natural log of the rent, a useful conversion for further analysis A plot of the distance and rent data in Figure 1-8 shows a nearly linear decay in rent as distance increases ... between two variables is linear regression analysis For this, we use the natural log of rent as the dependent variable Figure 1-9 shows a plot of the data in Table 1-3 Not surprisingly, it appears ... distance remains key This book will discuss the careful use of data often In the case of market rents, one must be mindful of the fact that no dataset supplants a careful market survey in the local area...

Ngày tải lên: 20/06/2014, 20:20

... CHAPTER 10 ST Analysis 10.1 ST Segment Analysis: Perspectives and Goals 10.2 Overview of ST Segment Analysis Approaches 10.3 Detection of Transient ST Change Episodes 10.3.1 Reference Databases 10.3.2 ... 11.2.1 The ECG Waveform 11.2.2 ECG Interval Analysis 11.2.3 Manual ECG Interval Analysis Automated ECG Interval Analysis The Probabilistic Modeling Approach Data Collection Introduction to Hidden ... Population 2.2.2 Data Collection Location and Length 2.2.3 Energy and Data Transmission Routes 2.2.4 Electrode Type and Configuration 2.2.5 ECG-Related Signals 2.2.6 Issues When Collecting Data from...

Ngày tải lên: 13/08/2014, 12:20

... sufficient for the signal processing tasks Data formats: When storing data, it is important to use an accurate and verifiable data format (at each step) If data are to be converted to another format, ... when choosing a data format and access libraries include: • • • • • • • • • • • • • What are the data going to be used for? Are the data format and libraries extensible? Is the data format compact? ... transmission of the data over the Internet? Are there libraries that allow me to protect access to the data over the Internet? Can the data format be easily converted into other data formats that...

Ngày tải lên: 13/08/2014, 12:20

... Log-Linear Modeling with Latent Variables and Missing Data, ” in U Engel and J Reinecke, (eds.), Analysis of Change: Advanced Techniques in Panel Data Analysis, Berlin/New York: Walter de Gruyter, 1996, ... Principal component analysis (PCA) involves the projection of N-dimensional data onto a set of N orthogonal axes that represent the maximum directions of variance in the data If the data can be well ... Missing Data 3.7.5.1 A Note on Spectral Leakage and Window Carpentry The periodogram for unevenly spaced data allows two different forms of spectral adjustment: the application of time-domain (data) ...

Ngày tải lên: 13/08/2014, 12:20

... simulated data DeBoer also pointed out the need to perform cross-spectral analysis between the RR tachogram, the systolic BP, and respiration signals Pitzalis et al [21] performed such an analysis ... transformation is to map (or project) data into another space which serves to highlight patterns in data and identify interesting projections To filter data we discard the noise, or uninteresting ... noninvertible transformation of data using a transformation matrix that has at least one column set to zero This is an irreversible removal of data that corresponds to a mapping of data to a lower number...

Ngày tải lên: 13/08/2014, 12:20

... components in a data set and have separated them out by projecting the data set onto these axes, we can then use these techniques to filter the data set 5.4.1 Principal Component Analysis To determine ... svds (data, 5); water f all(U ∗ S ∗ V ) P1: Shashi August 30, 2006 11:5 Chan-Horizon Azuaje˙Book 5.4 Data- Determined Basis Functions 151 data can in general be encoded in only p-dimensions of data ... Chan-Horizon Azuaje˙Book 5.4 Data- Determined Basis Functions 149 Both PCA and ICA attempt to find an independent set of vectors onto which we can transform data Those data that are projected (or...

Ngày tải lên: 13/08/2014, 12:20

... they classified TWA detection into preprocessing, data reduction, and analysis stages This section focuses upon the strengths and limitations of TWA analysis methods, broadly comprising short-term ... Schreiber, Nonlinear Time Series Analysis, Cambridge, U.K.: Cambridge University Press, 1997 McSharry, P E., and L A Smith, “Better Nonlinear Models from Noisy Data: Attractors with Maximum Likelihood,” ... Time-Series Analysis: What Does Regularity Quantify?” Am J Physio Heart Circ Physiol., Vol 266, 1994, pp H1643–H1656 Costa, M., A L Goldberger, and C K Peng, “Multiscale Entropy Analysis of Complex...

Ngày tải lên: 13/08/2014, 12:20

... ECG analysis The aim of such a feature (or parameter) extraction technique is to properly modify data according to the context of the specific problem at hand for the purposes of automated analysis ... ST-T Database: Standard for Evaluating Systems for the Analysis of ST-T Changes in Ambulatory Electrocardiography,” European Heart Journal, Vol 13, 1992, pp 1164–1172 Jager, F., et al., Analysis ... shows typical ECG data from an ambulatory ECG (AECG) record A transient ST segment episode compatible with ischemia (ischemic ST episode) begins in the second part of the third data segment shown...

Ngày tải lên: 13/08/2014, 12:20

... critically dependent on the choice of the database used for testing; Sensitivity analysis, to determine if analysis parameters are critically tuned to the test database An ST analyzer is considered ... heartbeat should be accurate Simultaneous analysis of two or more ECG leads offer the improvement of analysis accuracy in comparison to the single channel analysis with regard to noise immunity ... database records (2 hours) have been used (since they were selected to be sufficiently “clean”) The P1: Shashi August 24, 2006 11:52 Chan-Horizon Azuaje˙Book 272 ST Analysis other reference database...

Ngày tải lên: 13/08/2014, 12:20

... to automated ECG interval analysis, however, we can automatically highlight those waveforms which are least suitable to analysis by machine (and thus most in need of analysis by a human expert) ... 91 data points around the R peak (45 points before and 45 after) A data sampling rate equal to 360 Hz generates a window of 250 ms, which is long enough to cover a typical QRS complex The data ... of the mother wavelet to form an orthonormal basis for signal analysis The DWT is therefore most suited to applications such as data compression where a compact description of a signal is required...

Ngày tải lên: 13/08/2014, 12:20

... language for ECG data acquisition and analysis, has been designed to illustrate the advantages offered by XML for supporting data exchange between different ECG data acquisition and analysis devices ... “SOM-Based Data Visualization Methods,” Intelligent Data Analysis, Vol 3, No 2, 1999, pp 111–126 Ultsch, A., and H P Siemon, “Kohonen’s Self Organizing Feature Maps for Exploratory Data Analysis, ” ... tested on two real data sets to illustrate its data visualization and classification capabilities The first application is an ECG beat data set obtained from the MIT/BIH Arrhythmia database [58] Based...

Ngày tải lên: 13/08/2014, 12:20

... 3.2.2 Analysis with GC/MS 85 3.2.3 Analysis with LC/MS 86 3.2.4 Pre-processing of GC/MS data 88 3.2.5 Pre-processing of LC/MS data 88 3.2.7 Statistical analysis ... Devise the analytical method Analysis of samples with analytical method Tabulation of data obtained from analytical method Process the data with multivariate data analysis Figure General workflow ... providing reliable data prior to study of the food item The use of analytical methods would generate a large data set, making reasonable deductions difficult As such, multivariate data analysis would...

Ngày tải lên: 09/09/2015, 11:13

... this :Study design, subjects of the study, the data collection method, instruments as well as process of data collection and data analysis IV Data analysis and discussion This focuses on presenting, ... practice The interviews data served to support the data obtained from the survey questionnaires 28 CHAPTER IV- DATA ANALYSIS AND DISCUSSION 4.1.Questionnaires 4.1.1 Data analysis of the students’ ... 26 3.6 Data analysis 27 CHAPTER IV- DATA ANALYSIS AND DISCUSSION 28 4.1.Questionnaires 28 4.1.1 Data analysis of the students’ experiment questionnaires ...

Ngày tải lên: 12/04/2013, 16:19

... – DATA ANALYSIS, STATISTICS, AND PROBABILITY – ■ ■ ■ Cordelia has five more than three times the number ... 9+4+7+6+4 ᎏᎏ 30 = ᎏ5ᎏ = The average is (Divide by because there are numbers in the set.) 418 – DATA ANALYSIS, STATISTICS, AND PROBABILITY – To find the median of a set of numbers, arrange the numbers ... this, divide the numerator by the denominator Then change the decimal to a percentage ■ 20% – DATA ANALYSIS, STATISTICS, AND PROBABILITY – Example Kai invests $4,000 for nine months Her investment...

Ngày tải lên: 02/11/2013, 17:20

... Power of Big Data: The IBM Big Data Platform / Zikopoulos / 817-5 Harness the Power of Big Data: The IBM Big Data Platform Big Data is all about better analytics on a broader spectrum of data, and ... exactly what Big Data is Why Is Big Data Important? Before you try to understand what Big Data is, you should know why Big Data matters to business In a nutshell, the quest for Big Data is directly ... the Power of Big Data: The IBM Big Data Platform / Zikopoulos / 817-5 Harness the Power of Big Data 00-FM.indd 04/10/12 12:19 PM Flash 6X9 / Harness the Power of Big Data: The IBM Big Data Platform...

Ngày tải lên: 07/12/2013, 11:33

... GLANCE PART I Big Data: From the Business Perspective What Is Big Data? Hint: You’re a Part of It Every Day Why Is Big Data Important? 15 Why IBM for Big Data? 35 PART II Big Data: From ... splits Big Data into two key areas that only IBM seems to be talking about when defining Big Data: Big Data in motion and Big Data at rest In this chapter, we focus on the at-rest side of the Big Data ... Million Big Data Investment 40 40 49 A History of Big Data Innovation Domain Expertise Matters xi Contents xii PART II Big Data: From the Technology Perspective All About Hadoop: The Big Data...

Ngày tải lên: 07/12/2013, 11:34

... lecturing, as a profession would have died out by now These notes have a long history; a “first course in analysis rather like this has been given within the Mathematics Department for at least 30 years ... small and simplify things? In order to to this we need to estimate — replace the term by something bigger which is easier to handle, and so we have to deal with inequalities It often turns out that ... without being distracted by other irrelevant behaviours It usually doesn’t matter whether δ is very big or not To see this, consider: 1.10 Exercise Show that an open interval contains a neighbourhood...

Ngày tải lên: 12/12/2013, 04:15

... Fundamentals of Data Analysis in Access Chapter The Case for Data Analysis in Access Where Data Analysis with Excel Can Go Wrong 3 Scalability Transparency of Analytical Processes Separation of Data and ... standardizing data fields ■ ■ Analysis: Analysis is the investigation of the component parts of your data and their relationships to your data source as a whole You are analyzing your data when you ... analyzing your data Companion Database The examples demonstrated throughout this book can be found in the companion database This sample database is located at www.wiley.com/ go/access2007dataanalysis...

Ngày tải lên: 13/12/2013, 03:15