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Related Concept Videos

Multimachine Stability01:25

Multimachine Stability

Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

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Published on: March 20, 2017

Multiprocessor system using an automatically rearrangeable free-space multichannel optical switch: COSINE-2.

T Sakano, K Noguchi, T Matsumoto

    Applied Optics
    |September 11, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Future multiprocessor systems can utilize free-space optical interconnections for enhanced communication. The COSINE-2 system demonstrates a flexible and reliable 128x128 optical switch for dynamic processor network reconfiguration.

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    Last Updated: Jun 8, 2026

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    Published on: September 5, 2019

    Area of Science:

    • Computer Engineering
    • Optical Communications
    • Parallel Processing

    Background:

    • Free-space optical interconnection is a promising technology for multiprocessor communication.
    • Previous systems like COSINE-1 utilized manually reconfigured optical interconnections.
    • Advanced interconnection methods are needed for future high-performance computing.

    Purpose of the Study:

    • To introduce COSINE-2, an advanced multiprocessor system.
    • To demonstrate a flexible and reliable free-space optical switch.
    • To enable dynamic reconfiguration of processor networks.

    Main Methods:

    • Development of COSINE-2, an evolution of COSINE-1.
    • Implementation of a rearrangeable 128x128 free-space multichannel optical switch.
    • Utilization of a polarization-multiplexing technique for the optical switch.

    Main Results:

    • The optical switch provides full flexibility for network reconfiguration.
    • The COSINE-2 system was successfully built and experimentally validated.
    • System operations, including processor network reconfiguration, were performed reliably.

    Conclusions:

    • COSINE-2 offers a reliable and flexible solution for free-space optical interconnections.
    • The implemented optical switch effectively supports dynamic network management.
    • This technology advances interprocessor communication in multiprocessor systems.