Regression POLYMATH software

It is believed that the technician may have made a dilution factor-of-10 error in one of the concentration measurements, What do you think How do your answers compare using regression (POLYMATH or other software) compare with those obtained by graphical methods ... 

In nonlinear regression analysis, we search for those parameter t alues that minimize the sum of the squares of the differences beiw een the measured values and the calculated values for all the data points.- Not only can nonlinear regression find the best estimates of parameter values, it can al,so be used to discriminate between different rate law models, such as the Langmutr-Hin-shelw ood models discussed in Chapter 10. Many software programs are available to find these parameter values so that all one has to do is enter the data, The Polymath software will be used to illustrate this technique. In order to carry out the search efficiently, in some cases one has to enter initial estimates of the parameter -alues close to the actual values. These estimates can be obtained using Ihe linear-least-squares technique discussed on the CD-ROM Professional Reference Shelf. 

Polymath. The Polymath software includes an ordinary differemial equation (ODE) solver, a nonlinear equation solver, and nonlinear regression. As with previous editions. Polymath is included with this ediiion to explore the example problems and to solve the home problems. A special Polymath web site iwtvn-.iMrlymaih-.spfrware.coin tniler) has been set up f(ar this book by Polymath authors Cutlip and Shacham. This weh site provides information on how to obtain an iqxluted version of Polymath at a discount. 

An alternate computer solution would be to regress versus t with a software package such as Polymath. 

Polymath was chosen tw the software package to solve this problem. The data in Table ElO-4.1 were typed into the system. A. screen-shot by screen-shot set of in.structions on how to carry out regression is given on the CD-ROM and the web,... 

There are some software packages (i.e. ODE solvers, regression etc.) available to solve problems from reaction engineering and other areas. POLYMATH is a extremely user-friendly software package which makes modeling easy for the education of chemical engineers and chemists. POLYMATH is used to numerically solve... 

The differential and integral methods are used primarily in analyzing batch reactor data. Because a number of software packages (e.g.. Polymath, MATLAB) are now available to analyze data, a rather extensive discussion of nonlinear regression is included. 

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