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NAND flash-based Solid State Drives (SSDs) employ the Flash Translation Layer (FTL) to perform logical-to-physical address translation. Modern page-level FTLs selectively cache the address mappings in the limited SRAM while storing the mapping table in flash pages (called translation pages). However, many extra accesses to the translation pages are required for address translation, which decreases...
This paper describes the implementation of serial communication between the PLC and the host-computer in the control system of waste water pump, gives a detailed introduction to the communication protocols and parameters setting and also gives part of the serial-communication program based on visual basic 6.0. Pratice shows that this control system meets the requirements as expected, attains management...
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