... TẠP CHÍ PHÁT TRIỂN KH&CN, TẬP 11, SỐ 03 - 2008 Trang 49 DEVELOPMENT OF AN AUTOUMATIC DATAPROCESSING FOR TRIAXIAL COMPRESSION TEST Pham Hong Thom(1), Le Minh Son(2), Phan Tan ... are recorded by examiner after certain duration. This paper studies on developing an automatic dataprocessing for automatic recording these parameters. A camera is used to track the drainage ... the second one to the first one by using some simple and low cost data acquisition systems using a personal computer. The data acquisition systems must attain some advantages, such as: automatic...
... the datamodeling for UML profile, the UML fully supports datamodeling needs. It allows thesupport of software development and datamodeling with one unified language. Using the UML data modeling ... Rational’s Data Modeling Profile for the UML2.The UML DataModeling ProfileThis white paper describes in detail the DataModeling profile for the UML as implemented byRational Rose Data Modeler, ... UML.DatabaseThe Database is the system for data storage and controlled access to stored data. It is the biggestelement a data model supports.The relational database is the standard database...
... to enforce data integrity.Overview of DataModeling and Database Design 8Ć3ObjectivesBefore you build your tables, you design your database. In this lesson, youexamine the datamodeling process ... store the data of a table in the database.DRedefine integrity constraints.For more information, seeDevelop Complex Data Models and Design Databases course description.Overview of DataModeling ... non-UID attribute.Overview of DataModeling and Database Design 8Ć29Designing the DatabaseThe database design stage produces design specifications for a relational database,including definitions...
... the data, then items (i) and (ii) are probably worthless.Unfortunately, many practitioners of parameter estimation never proceed beyonditem (i). They deem a fit acceptable if a graph of data ... particular data set of xi’s and yi’s, we have the intuitive feeling thatsome parameter sets a1 aMare very unlikely — those for which the modelfunction y(x) looks nothing like the data — ... Chapters 18–19.15.1 Least Squares as a Maximum LikelihoodEstimatorSuppose that we are fitting N data points (xi,yi)i=1, ,N, to a model thathas M adjustable parameters aj,j=1, ,M. The model...
... [1]15.2 Fitting Data to a Straight LineA concrete example will make the considerations of the previous section moremeaningful. We consider the problem of fitting a set of N data points (xi,yi)toa ... σ.Thatsubscript also propagates docilely into (15.1.4), so that the maximum likelihood658Chapter 15. Modeling of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright ... that this data set could haveoccurred?” If the yi’s take on continuous values, the probability will always bezero unless we add the phrase, “ plus or minus some fixed ∆y on each data point.”So...
... fit(float x[], float y[], int ndata, float sig[], int mwt, float *a,float *b, float *siga, float *sigb, float *chi2, float *q)Given a set of data pointsx[1 ndata],y[1 ndata]with individual standard ... *= sigdat;*sigb *= sigdat;} else {for (i=1;i<=ndata;i++)*chi2 += SQR((y[i]-(*a)-(*b)*x[i])/sig[i]);if (ndata>2) *q=gammq(0.5*(ndata-2),0.5*(*chi2)); Equation (15.2.12).}}CITED REFERENCES ... P.R. 1969, Data Reduction and Error Analysis for the Physical Sciences(New York:McGraw-Hill), Chapter 6.15.3 Straight-Line Data with Errors in BothCoordinatesIf experimental data are subject...
... Calculate χ2.*q=1.0;if (mwt == 0) {for (i=1;i<=ndata;i++)*chi2 += SQR(y[i]-(*a)-(*b)*x[i]);sigdat=sqrt((*chi2)/(ndata-2)); For unweighted data evaluate typ-ical sig using chi2,andad-just ... *= sigdat;*sigb *= sigdat;} else {for (i=1;i<=ndata;i++)*chi2 += SQR((y[i]-(*a)-(*b)*x[i])/sig[i]);if (ndata>2) *q=gammq(0.5*(ndata-2),0.5*(*chi2)); Equation (15.2.12).}}CITED REFERENCES ... P.R. 1969, Data Reduction and Error Analysis for the Physical Sciences(New York:McGraw-Hill), Chapter 6.15.3 Straight-Line Data with Errors in BothCoordinatesIf experimental data are subject...
... float sig[], int ndata, float a[], int ma,float **u, float **v, float w[], float *chisq,void (*funcs)(float, float [], int))Given a set of data pointsx[1 ndata],y[1 ndata]with individual ... matrices u,v and the vector w are input asworking space. The logical dimensions of the problem are ndata data points by mabasis functions (and fitted parameters). If you care only about the values a ... 678Chapter 15. Modeling of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright...
... attempting to reduce the value χ2of a fit between a set of data pointsx[1 ndata],y[1 ndata]with individual standard deviationssig[1 ndata],and a nonlinear function dependent onmacoefficientsa[1 ... random measurement errors, as a measured data set, which we will symbolizeas D(0). Thedataset D(0)isknown to the experimenter.He or she fits the data to a model by χ2minimization or some ... 688Chapter 15. Modeling of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright...
... the actual data set DS(0), with its N data points, togenerate any number of synthetic data sets DS(1),DS(2), , also with N data points.The procedure is simply to draw N data points ... email to trade@cup.cam.ac.uk (outside North America).synthetic data set 1synthetic data set 2synthetic data set 3synthetic data set 4a2 χ2minχ2min(s)a1 (s)a3 (s)a4 ... email to trade@cup.cam.ac.uk (outside North America).actual data sethypothetical data sethypothetical data sethypothetical data seta3 a2 a1 fittedparameters a0χ2mintrue...
... *arr,d,sum=0.0;arr=vector(1,ndatat);for (j=1;j<=ndatat;j++) arr[j]=yt[j]-b*xt[j];if (ndatat & 1) {aa=select((ndatat+1)>>1,ndatat,arr);}else {j=ndatat >> 1;aa=0.5*(select(j,ndatat,arr)+select(j+1,ndatat,arr));}abdevt=0.0;for ... Kolmogorov-Smirnov statistic (equation 14.3.6) and the Spearman rank-order706Chapter 15. Modeling of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright ... trade@cup.cam.ac.uk (outside North America).*abdev=abdevt/ndata;}#include <math.h>#include "nrutil.h"#define EPS 1.0e-7extern int ndatat; Defined in medfit.extern float *xt,*yt,aa,abdevt;float...
... Overview of DataModeling andDatabase Design8Overview of DataModeling and Database Design 8Ć5OverviewWhen you create a database, you need to carefully consider ... optionalityor degree.Overview of DataModeling and Database Design 8Ć29Designing the DatabaseThe database design stage produces design specifications for a relational database,including definitions ... store the data of a table in the database.DRedefine integrity constraints.For more information, seeDevelop Complex Data Models and Design Databases course description.Overview of Data Modeling...