procedures and modeling of data

... Introduction for the security    Networks and exchanges of data Computer security The risks Networks and exchanges of data  For the exchange of the data, we've changed the technology    The ... simple reasons :    Data shared with the clients and the partners Propose different services Profitability Networks and exchanges of data   The connection between Internet and the company's network ... a large way with a lot of persons They can use this solution and they obtain a lot of services But Inside an Intranet we find a lot of data and information For the live of the company, they're...

Ngày tải lên: 09/12/2013, 17:22

... R 1964, Mathematical Theory of Probability and Statistics (New York: Academic Press), Chapter X Korn, G.A., and Korn, T.M 1968, Mathematical Handbook for Scientists and Engineers, 2nd ed (New ... estimates on the parameters, and (iii) a statistical measure of goodness -of- fit When the third item suggests that the model is an unlikely match to the data, then items (i) and (ii) are probably worthless ... on? The answer to these questions takes us into the subject of maximum likelihood estimators Given a particular data set of xi ’s and yi ’s, we have the intuitive feeling that some parameter...

Ngày tải lên: 15/12/2013, 04:15

... 68 percent of the time, within ±2σ 95 percent of the time, and within ±3σ 99.7 percent of the time Extending this, one would expect a measurement to be off by ±20σ only one time out of × 1088 ... likelihood of the parameters given the data This identification is entirely based on intuition It has no formal mathematical basis in and of itself; as we already remarked, statistics is not a branch of ... 15 Modeling of Data estimate of the model parameters is obtained by minimizing the quantity N χ2 ≡ i=1 yi − y(xi ; a1 aM ) σi (15.1.5) Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC...

Ngày tải lên: 15/12/2013, 04:15

... in the direction of the smallest χ2 between each data point and the line with slope b, and also as the variance of the linear combination yi − a − bxi of two random variables xi and yi , 2 Var(yi ... ndata, float sig[], int mwt, float *a, float *b, float *siga, float *sigb, float *chi2, float *q) Given a set of data points x[1 ndata],y[1 ndata] with individual standard deviations sig[1 ndata], ... Modeling of Data } CITED REFERENCES AND FURTHER READING: Bevington, P.R 1969, Data Reduction and Error Analysis for the Physical Sciences (New York: McGraw-Hill), Chapter 15.3 Straight-Line Data...

Ngày tải lên: 15/12/2013, 04:15

... generalization of §15.2 is to fit a set of data points (xi , yi ) to a model that is not just a linear combination of and x (namely a + bx), but rather a linear combination of any M specified functions of ... North America) float chixy(float bang) Captive function of fitexy, returns the value of (χ2 − offs) for the slope b=tan(bang) Scaled data and offs are communicated via the global variables { int ... to input data x[1 ndat] and y[1 ndat] with errors in both x and y, the respective standard deviations being the input quantities sigx[1 ndat] and sigy[1 ndat] Output quantities are a and b such...

Ngày tải lên: 15/12/2013, 04:15

... float [], int)) Given a set of data points x[1 ndata],y[1 ndata] with individual standard deviations sig[1 ndata], use χ2 minimization to determine the coefficients a[1 ma] of the fitting function y ... roundoff error An alternative, and preferred, technique involves QR decomposition (§2.10, §11.3, and §11.6) of the design matrix A This is essentially what we did at the end of §15.2 for fitting data ... denote the columns of U (each one a vector of length N ); and let the vectors V(i) ; i = 1, , M denote the columns of V (each one a vector of length M ) Then the solution (2.6.12) of the least-squares...

Ngày tải lên: 15/12/2013, 04:15

... definition of αkl the formula 684 Chapter 15 Modeling of Data the components of [α] and you see that there is only one obvious quantity with these dimensions, and that is 1/αkk , the reciprocal of the ... method, attempting to reduce the value χ2 of a fit between a set of data points x[1 ndata], y[1 ndata] with individual standard deviations sig[1 ndata], and a nonlinear function dependent on ma ... linearized fitting matrix alpha, and vector beta as in (15.5.8), and calculate χ2 { int i,j,k,l,m,mfit=0; float ymod,wt,sig2i,dy,*dyda; 688 Chapter 15 Modeling of Data #include *y=0.0;...

Ngày tải lên: 15/12/2013, 04:15

... 690 Modeling of Data actual data set χ2 fitted parameters a0 a2 hypothetical data set a3 pe a1 hypothetical data set ex hypothetical data set true parameters a ... which random errors enter the experiment and data analysis does not vary rapidly as a function of atrue , so that a(0) can serve as a reasonable surrogate Now, often, the distribution of a(i) ... Carlo simulation Suppose that your data set consists of N independent and identically distributed (or iid) data points.” Each data point probably consists of several numbers, e.g., one or more...

Ngày tải lên: 15/12/2013, 04:15

... 704 Chapter 15 Modeling of Data #include #include "nrutil.h" int ndatat; float *xt,*yt,aa,abdevt; ndatat=ndata; xt=x; yt=y; for (j=1;j1,ndatat,arr); } else { j=ndatat >> 1; aa=0.5*(select(j,ndatat,arr)+select(j+1,ndatat,arr)); ... solution that generates the initial guesses for a and b Notice that the evaluation of the right-hand side of (15.7.16) occurs in the function rofunc, with communication via global (top-level)...

Ngày tải lên: 15/12/2013, 04:15

Ngày tải lên: 08/03/2014, 15:20

... gradual buildup of the reader’s understanding of modeling and simulation to visit the problem again on a higher level of rigor and to distinguish clearly the difference between modeling and simulation ... Equations and Modeling of Chemical and Biochemical Processes, Said S E H Elnashaie and Parag Garhyan Batch Fermentation: Modeling, Monitoring, and Control, Ah Cmar, Satish J Parulekar, Cenk Undey, and ... Examples for the General Equations Modeling of Biochemical Systems 3.8.1 Modeling of Enzyme Systems 3.8.2 Modeling of Microbial Systems References Problems Modeling of Distributed Systems 4.1.1 Isothermal...

Ngày tải lên: 01/04/2014, 10:20

... with an adjustable power up to W and a pulse width of 20 ns The Nd:YLF output beam is expanded by a factor of 10 using spherical lenses with focal lengths of 30 and 300 mm The laser energy can ... pressure and known process variables, which could be used in future work The final relation is given by FIG Bubble growth data and model results for spot size of 30 ␮m and ink thickness of 50 ␮m ... combination of ink thickness, beam diameter, and ablation energy IV RESULTS AND DISCUSSION A Comparisons of experimental and predicted behaviors The spot sizes selected for analysis of pure QS300...

Ngày tải lên: 06/05/2014, 09:01

... University of Aizu, Los Alamos National Laboratory, Air Force Office of Scientific ResearchJAsian Office of Airspace Research and Development*, University at Buffalo, Sendai Section of the Institute of ... Maki and J Kolodzey Vol 46: Terahertz Science and Technology for Military and Security Applications eds Dwight L Woolard, James Jensen, R Jennifer Hwu and Michael S Shur PHYSICS AND MODELING OF ... Singapore by Mainland Press Pte Ltd PREFACE The content of this issue is based on the invited and contributed papers presented by the researchers working in the field of physics and modeling of novel...

Ngày tải lên: 04/06/2014, 14:40

... N(θ)is the number of paths of which the jn = θ, and the Pn, θ is the power of the corresponding path 4.2 Data analysis and angular offset modeling Figure depicts a spatial sample of the SAGE results ... α − μ ⎟ ⎜ σ ασ ⎝1 + e ⎠ ⎛ (7) 0.018 0.25 offset1 data log-logistic fit offset1 data logistic fit 0.016 0.014 Density of abs offset 0.2 Density of abs offsets e 0.15 0.1 0.012 0.01 0.008 0.006 ... environment, most of the propagation paths come along the street and are at the same side of the LoS line Thus, the offset between the mean angle of PAS distribution and LoS direction appears and it determines...

Ngày tải lên: 20/06/2014, 21:20

... structure of the skull is not symmetrical about the midline of the animal [1] DATA ACQUISITION The chain of data acquisition and recording is composed by a hydrophone, a block of amplification, and ... transmission of ultrasonic pulses and the reception of the return echoes The words sonar clicks, echolocation clicks, and biosonar are used to describe the activity of guideline, of navigation, and of ... It refers to the principle of detection and localization of objects in submarine environment, through emission of sonorous pulses and the processing of the echoes of return from the same objects...

Ngày tải lên: 22/06/2014, 23:20

... Comparison of results of sampling of 26 Salmonella infected broiler flocks at weeks of age, and at slaughter age by pairs of sock samples No of Salmonella positive samples at slaughter age No of Salmonella ... 1981), Proportion of agreement P0, P+,P-, and Odds Ratio OR (Fleiss 1981) Comments on and interpretation of the statistics Cohen’s Kappa (κ) is a popular way of quantifying level of agreement, however, ... vet scand vol 43 no 1, 2002 Procedures for detection of Salmonella in chicken evaluation of classification It measures the proportion of coplaced pairs (Hubert & Arabie 1985) The Adjusted Rand statistic...

Ngày tải lên: 12/08/2014, 15:20

... of 1,776 genes per strain with a standard deviation of 14 genes Of the 13 strains, the average number of genes was 1,793 with a standard deviation of 62 genes The model predicted an average of ... valuable discussions and data checking; Alice Erwin and Arnold Smith of the Seattle Biomedical Research Institute and Maynard V Olson, Rajinder K Kaul and Yang Zhou of the University of Washington Genome ... not level off due to the discovery of rare genes Figure of addition6 each genome to number of new gene The observed and expected the clustering dataset clusters found at the The observed and expected...

Ngày tải lên: 14/08/2014, 07:21

... than that of NFκB across all divergence distances (Figure and Table 2) For example, the observed RTRs for Myc and NFκB were 0.219 and 0.083 at a divergence distance of 1.0, and 0.373 and 0.167 ... relative to TSS [-100, -150] Copy number of E2F Copy number of Myc DNA strand of E2F site + DNA strand of Myc site + Additional space constraint between Myc and E2F sites [50, 60] Genome Biology ... c2 and c are model parameters, c is the product of c1 and c2, and θ is the restriction translocation distance of a TFBS In this model, c1 and c2 are associated with the evolutionary distances of...

Ngày tải lên: 14/08/2014, 08:20

... List of Figures Figure 5.5 Dependency of elastic modulus of explicit RVE and effective RVE on diameter of clay particle, (for ECNs) Figure 5.6 Dependency of elastic modulus of explicit RVE and ... dependency of elastic modulus on the number of clay particles Figure 3.6 Effect of particle size on (a) elastic modulus and (b) tensile strength of epoxy/clay nanocomposites; Effect of number of silicate ... CHARACTERIZATION AND MODELING OF POLYMER/CLAY NANOCOMPOSITES SONG SHAONING (B.ENG) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF MECHANICAL ENGINEERING NATIONAL UNIVERSITY OF SINGAPORE...

Ngày tải lên: 09/09/2015, 11:20