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The
following changes were made since version 7.0.2 was released. For
changes made prior to version 7.0.2, see What's
New in Version 7.0.2 and What's New
in Version 7.0.
New Features
-
Two and three-dimensional arrays are now directly supported in
the equations. For example, you can write equations like this:
A[1..M,1..N] = k*F[i]+G[i,2,j]
where A is a 2D array, F is a vector (1D array), and G is a 3D array.
-
Support for discrete equations (conveyors, ovens, and queues)
has been added. They have similar properties to the conveyor,
oven, and queue stocks in STELLA; however, some capabilities such
as conveyor leakage are not yet supported. Explanatory models
can be found in the "How Do I" folder.
-
The DELAY built-in function now works properly with zero
delay values.
-
Discrete functions such as DELAY now work properly when
used in array equations. For example, if you have ten signals
A[1] through A[10], a set of delayed signals B[1] through B[10]
can be created as follows:
B[1..10] = DELAY(A[i], ...)
-
Prime notation now defines a regular equation in addition to automatically-generated
differential equations. For example the equation x'' = 2 leads
to the following definitions:
x'' = 2
d/dt(x') = x''
d/dt(x) = x'
instead of:
d/dt(x') = 2
d/dt(x) = x'
-
The INF keyword provides a convenient way to represent
infinity in your equations.
Flowchart
Improvements
-
The Import Image and Remove Image commands reflect
the context in which they are used: if one or more icons are selected,
the commands change to Import Icon Image and Remove
Icon Image; if no icons are selected, they change to Import
Background Image and Remove Background Image.
-
Flowchart background images are saved in the model file so they
are restored when the model is reopened.
-
Flowchart icon images imported using the Import Icon Image
command are enlarged or reduced as necessary to prevent the icon
from becoming too small or large.
-
The Change Color command has been renamed to Background
Color to better reflect its purpose.
-
Pipes can be hidden independently of flows by unchecking the Pipes
box in the Icon Visibility dialog.
-
Keyboard shortcuts have been added for the Group and Ungroup
commands.
-
When programatically selecting an icon (e.g., via the Show
Icon command), the flowchart is scrolled as needed so that
the icon is visible.
Important:
Due to the above changes, flowchart models saved in version 8.0 cannot
be opened by previous versions of Berkeley Madonna.
Bug
Fixes
-
[Macintosh only] Random number generators were producing erroneous
output when running with "fast execution" turned off.
-
[Windows only] Program occasionally crashed when using the NETFLOW
built-in with arrays of differential equations.
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