Connection Machine Simulation of Boundary Effects in Ultrasonic NDE
Sequential (von Neumann) computers, having a single processor and a very large amount of memory, are inherently inefficient for most applications. In fact, while the processor is extremely busy all the time, only a small portion of the memory is active. Larger computers are even less efficient, since the ratio of processing power to memory is even smaller and the length of computation is dominated by the ever-increasing time required to move data between processor and memory. To overcome this so-called “von Neumann bottleneck,” a new kind of computer, called the “Connection Machine” (CM) has been designed, with a large number (many thousands or even millions, if virtual processors are also included) of processors, connected in a programmable way, in the framework of a fixed physical wiring scheme.1,2.
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