Computer software packages MATLAB

There are several computer software packages that are quite helpful in applying some of the computationally intensive methods. The PC-MATLAB System Identification Toolbox (The Math Works, Inc., Sherborn, Mass.) is an easy-to-use, powerful software package that provides an array of alternative tools,... 

With an initial guess of Ca(f), /(O can be calculated by solving Equations 27.13-27.16 using fitting routines available in computer software packages such as Matlab [17]. 

Overall, most of the requirements for a process spectrometer/analyzer are straightforward to implement, but they do require attention at the design level. Another important area, which is FTIR specific, is the user interface and the need to provide for industry standard data communications. Standard software packages do exist for process instrumentation. For prototype development, and even for the front-end interface in a stand-alone mode of operation, software products, such as National Instraments Lab View and the Mathworks MatLab, are also important instrumentation development tools. Note that National Instruments also provides important computer-based electronics and hardware that meet most of the computer interfacing, and system control and communications needs for modem instrumentation. For practical installations, a product known... 

For large-scale problems, the most widely useful mathematical tool available is computational/numerical simulation. A great number of computer tools are available for simulation of ordinary differential equation (ODE) based models, such as Equations (3.27). Here we demonstrate how this system may be simulated using the ubiquitous Matlab software package. 

Throughout this book, we have seen that when more than one species is involved in a process or when energy balances are required, several balance equations must be derived and solved simultaneously. For steady-state systems the equations are algebraic, but when the systems are transient, simultaneous differential equations must be solved. For the simplest systems, analytical solutions may be obtained by hand, but more commonly numerical solutions are required. Software packages that solve general systems of ordinary differential equations— such as Mathematica , Maple , Matlab , TK-Solver , Polymath , and EZ-Solve —are readily obtained for most computers. Other software packages have been designed specifically to simulate transient chemical processes. Some of these dynamic process simulators run in conjunction with the steady-state flowsheet simulators mentioned in Chapter 10 (e.g.. SPEEDUP, which runs with Aspen Plus, and a dynamic component of HYSYS ) and so have access to physical property databases and thermodynamic correlations. 

A large number of ordinary differential equation solver software packages (i.e., ODE solvers) which are extremely user friendly have become available. We shall use POLYMATH S to solve the examples in the printed text. However, the CD-ROM contains an example that uses ASPEN, as well as all the MATLAB and POLYMATH solution programs to the example programs. With POLYMATH one simply enters Equations (E4-7.3) and (E4-7.4) and the corresponding parameter value into the computer Table E4-7.1) with the initial (rather, boundary) conditions and they are solved and displayed as shown in Figure E4-7.1,... 

A second option is to use existing packages for numerical methods. The software libraries by IMSL and NAG have a wide variety of state-of-the-art numerical integrators. These libraries are well documented, reliable, and flexible, and can be found at most university computing centers or networks. The packages Matlab, Mathematica, and Maple are more interactive and also have programs for solving ordinary differential equations. 

In the present stage of interfacial science, there exists a number of models which give a more or less rigorous explanation of the phenomena observed at interfaces on a molecular level. These models inevitably involve mathematics which is more complicated than that used earlier and the related calculations, in general, cannot be performed even using quite advanced computational software available now, e.g. MatCad or MatLab packages. 

The DODS software package can be used to complete most of the examples and tutorials in this book. The package has been written in Matlab, but has been complied such that it may be used on a computer without Matlab installation. It is also useful as an independent design tool and, as shown in the examples in the book, the results obtained can be used as initialization to rigorous simulation packages such as Aspen Plus . The DODS package consists of five independent packages ... 

For comparison, the values computed above are compared with the values obtained using different software in Table 1.6. It can be seen that each software package can compute the same value differently. In all cases, the median will be computed the same way, since it is a fixed value. As was previously mentioned, this verifies that quartile. inc function in Excel is equivalent to the values obtained manually based on Eq. (1.7), while quart i 1 e. exc function in Excel is based on option 1 for Eq. (1.7). Einally, MATLAB uses option 2 for Eq. (1.7). Nevertheless, all values are relatively close to each other and would not impact too greatly the overall results. 

The following problems should be solved with the help of a computer and appropriate software packages, such as MATLAB or Exce. ... 

Amazon s EC2 represents one end of a spectrum in that its utility computing service consists of a bare-bones server built around the Intel x86 processor architecture. Cloud users must provide all of the software themselves, and open-source building blocks, such as the Linux operating system, are popular starting points. However, scientific and engineering research also frequently requires the use of proprietary software packages, such as Matlab. 

Section III consists of Chapters 5 through 10. They represent what may be named The Backbone Materials of Chemical Engineering. Each chapter in this section, except Chapter 10, will encompass two sections one includes the theoretical principles in a condensed format, the other presents a set of numerically solved problems using interactive numerical software packages (Excel, MATLAB ). This way, the dual themes of presenting the fundamentals followed by computer applications are realized. Application problems for Section III are found in Appendix A. 

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