Programming example

An Excel spreadsheet program (Example 7-l.xls) was developed to determine the theoretical power of any agitator type with given fluid physical properties and tank geometry. 

Solution The following is a complete program for performing the calculations. It is written in Basic as an Excel macro. The rather arcane statements needed to display the results on the Excel spreadsheet are shown at the end. They need to be replaced with PRINT statements given a Basic compiler that can write directly to the screen. The programming examples in this text will normally show only the computational algorithm and will leave input and output to the reader. 

Consider a typical linear programming example in which N grades of paper are produced on a paper machine. Due to raw materials restrictions not more than a, tons of grade i can be produced in a week. Let... 

Contents Introduction. - Basic Equations. -Diffusional Transport - Digitally. - Handling of Boundary Problems. - Implicit Techniques and Other Complications. - Accuracy and Choice. -Non-Diffusional Concentration Changes. - The Laplace Equation and Other Steady-State Systems. - Programming Examples. - Index. 

The schemes considered are only a few of the variety of combinations of consecutive first-order and second-order reactions possible including reversible and irreversible steps. Exact integrated rate expressions for systems of linked equilibria may be solved with computer programs. Examples other than those we have considered are rarely encountered however except in specific areas such as oscillating reactions or enzyme chemistry, and such complexity is to be avoided if at all possible. 

During the past two decades, a relatively few macrocyclic polyethers have played central roles in numerous research programs. Examples are 18-crown-6, dibenzo-18-crown-6, and aza-15-crown-5. 4,13-D1aza-18-crown-6 and its derivatives are compounds of considerable current interest despite the parent s high price and limited availability. 4,13-Diaza-18-crown-6 is a key compound in the study of two-armed macrocycles since it may readily be alkylated or acylated to afford a variety of symmetrical, N,N -disubstituted derivatives. 

Figure 4.5 Three-phase horizontal separator Vessize program example rims (a) earlier DOS version, and (6) screen display from the current version in Visual Basic format.

Figure 4.10 Three-phase vertical separator Vessize program example rim.

A Program Example The program RefFlsh uses the Open command button to install a data file named flshdat. The following program code is to be stored in the Open command button. If you could view the code contained in this button, you would see the following ... 

For the linear-programming example problem presented in this chapter where the simultaneous-equation solution is presented in Table 5, solve the problem using the simplex algorithm as was done in the text for Ihe example solved in Fig. 11-10. Use as the initial feasible starting solution the case of solution 2 in Table 5 where x2= S4 = 0. Note that this starting point should send the solution directly to the optimum point (solution 6) for the second trial. 

Program examples POLYMATH, MaiLab can be loaded from the CD-ROM (see the Introduction)... 

A, B. File corruption and user error account for almost all of the problems with software applications. File corruption can be caused by failing hard drives, power failures, viruses, or even poorly written programs. Examples of user errors are deleting critical application files, shutting down the system improperly, or introducing beta software onto the system that causes problems with other applications. 

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