Mike Krzyzewski is really a famous coach of Dream Team. She has coached north america men's basketball team for some time, that's clinched numerous medals for his country. Following Londonfl jerseys supplyn Olympic was over, Krzyzewski told The Associated Press that this game will be his final one as national coach, a job he's held for seven years. He had left open the possibility of swomen nfl jerseystaying with the team beyond the London Games, when practice on Saturday said these will be his last Olympics.When asked if he was sure, Krzyzewski didn't hesitate before again saying, "yecheap nfl jerseys wholesales," this will be his last game "If we could win it, then it might be three major championships in a row, i always do not know when that has been done because we haven't usually won http://govoriotkrito.bg/libs/nflcn08.htmthe globe championships," Krzyzewski said. "It becomes an enormous thing for the program." Whatever, he's an awesome coach. His achievement are going to be remembered by the country.cheap nfl jerseys
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控製器的分類及功能

2014/8/19 9:08:56點擊:

控製器分組合邏輯控製器和微程序控製器,兩種控製器各有長處和短處。組合邏輯控製器設計麻煩,結構複雜,一旦設計完成,就不能再修改或擴充,但它的速度快。微程序控製器設計方便,結構簡單,修改或擴充都方便,修改一條機器指令的功能,隻需重編所對應的微程序;要增加一條機器指令,隻需在控製存儲器中增加一段微程序,但是,它是通過執行一段微程。具體對比如下:組合邏輯控製器又稱硬布線控製器,由邏輯電路構成,完全靠硬件來實現指令的功能。

電磁吸盤控製器:交流電壓380V經變壓器降壓後,經過整流器整流變成110V直流後經控製裝置進入吸盤此時吸盤被充磁,退磁時通入反向電壓線路,控製器達到退磁功能。
門禁控製器:門禁控製器工作在兩種模式之下。一種是巡檢模式,另一種是識別模式。在巡檢模式下,控製器不斷向讀卡器發送查詢代碼,並接收讀卡器的回複命令。這種模式會一直保持下去,直至讀卡器感應到卡片。當讀卡器感應到卡片後,讀卡器對控製器的巡檢命令產生不同的回複,在這個回複命令中,讀卡器將讀到的感應卡內碼數據傳送到門禁控製器,使門禁控製器進入到識別模式。在門禁控製器的識別模式下,門禁控製器分析感應卡內碼,同設備內存儲的卡片數據進行比對,並實施後續動作。門禁控製器完成接收數據的動作後,會發送命令回複讀卡器,使讀卡器恢複狀態,同時,門禁控製器重新回到巡檢模式。