20-sim

20-sim is commercial modeling and simulation program for multidomain dynamic systems, which is developed by Controllab. With 20-sim models can be entered as equations, block diagrams, bond graphs and physical components. 20-sim is widely used for modeling complex multi-domain systems and the development of control systems.

Use

20-sim supports four methods for modeling dynamic systems: iconic diagrams, block diagrams, bond graphs and equations and allows all of these methods to be used in one model. The package has advanced support for bond graph modeling, making it well known in bond graph communities. For modeling physical systems the package provides libraries for electrical systems, mechanical systems, hydraulics systems and thermal systems. For block diagrams, libraries comparable to those of Simulink, are provided. A feature of the software is the option to create models with differential equations and package them as block diagram elements or physical components.

20-sim models can be simulated using state of the art numerical integration methods. After checking and processing, models are directly converted into machine code, resulting in high speed simulations. Unlike Simulink, simulation results are shown in 20-sim in a separate window called the Simulator. The simulator is versatile: plots can be displayed horizontally and vertically as time and frequency based plots and 3D animations.

Sim (Korean surname)

Sim or Shim is a Korean surname. There are six Shim clans in Korea based in the regions ofCheongsong, Pungsan, Samcheok, Buyu, Uiryeong, and Jeonju. The biggest Sim clan is Cheongsong; they comprise about 85% of the all those with the surname Shim. Fourteen percent of all Korean Shims are members of the Pungsan and Samcheok clans. As of 2000, there were 252,255 people with this surname in South Korea, less than 1% of the population.

List of famous people

Similitude (Star Trek: Enterprise)

"Similitude" is the tenth episode from the third season of the television series Star Trek: Enterprise. It first aired on November 19, 2003 and was the sixty-second episode of the series.

Plot

Commander Tucker, while endeavoring to increase to stable speed of Enterprise to Warp 5, becomes comatose when the engines destabilize and explode. Doctor Phlox suggests a radical and controversial procedure to save him - growing a mimetic symbiote as a neurological donor. Archer, concerned with the overarching goal of their mission, gives the order to do so. The symbiote, with a natural life-span of two weeks, is then injected with Tucker's blood and is soon born. Phlox names him "Sim", and as he develops rapidly, Tucker's memories and personality begin to express themselves (including an interest in engineering, and a romantic attraction to Sub-Commander T'Pol).

The window of time approaches when Phlox must perform the transplant, which, according to him, will unfortunately now be fatal to Sim-Trip. Sim, having now 'met' himself in sickbay, reveals knowledge of an experimental procedure that might allow for an extension (presumably by decades) of his lifespan. Archer learns that Phlox was aware of this procedure, but concealed his knowledge of it due to its highly experimental and poorly researched nature. Sim then expresses a strong desire to live —Tucker's own life notwithstanding—through the rest of his natural life. Later, a tired-looking Archer, angered at finding Sim in Trip's quarters, states he would rather Sim voluntarily submit to the fatal procedure than be forced to do so.

Sim (pencil game)

The game of Sim is played by two players on a board consisting of six dots ('vertices'). Each dot is connected to every other dot by a line ('edge').

Two players take turns coloring any uncolored lines. One player colors in one color, and the other colors in another color, with each player trying to avoid the creation of a triangle made solely of their color (only triangles with the dots as corners count; intersections of lines are not relevant); the player who completes such a triangle loses immediately.

Ramsey theory can also be used to show that no game of Sim can end in a tie. Specifically, since the Ramsey number R(3,3)=6, any two-coloring of the complete graph on 6 vertices (K₆) must contain a monochromatic triangle, and therefore is not a tied position. This will also apply to any super-graph of K₆. For another proof that there must eventually be a triangle of either color, see the Theorem on friends and strangers.

Computer search has verified that the second player can win Sim with perfect play, but finding a perfect strategy that humans can easily memorize is an open problem.