{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","id":"38270854-596f-4a26-8183-db8c968c6020","uuid":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","normalized_title":"编码隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","isbns":["9787121181184","0123456789","6044921875","3039331000","0000000000","0000000000000"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":438,"navigation_url":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020","title_url":"https://workshop.closeclaw.top/ai/title/%E7%BC%96%E7%A0%81%20%E9%9A%90%E5%8C%BF%E5%9C%A8%E8%AE%A1%E7%AE%97%E6%9C%BA%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%83%8C%E5%90%8E%E7%9A%84%E8%AF%AD%E8%A8%80","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/38270854-596f-4a26-8183-db8c968c6020","page_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/page","search_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/search"},"page":{"printed_page":166,"pdf_page":182,"physical_index":182,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"13bd0a8071e395178683a6a989fe11c0b4d991ab7b770c55a1b0c5bad0323d00"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"编码—隐匿在计算机软硬件背后的语言\n\n难道你不觉得有点奇怪吗？两个开关都断开—和第一幅场景描述的是一模一样一一但这里的灯泡却仍发光。这与我们先前所见过的所有情况都完全不同。先前遇到的电路其输出依赖且仅依赖于其输入，这次的结论与以前的大相径庭。无论上面的开关怎么调整其状态，灯泡总是亮着。这个开关对电路毫无影响，究其原因可以发现这是由于左边或非门的输出一直为0。\n\n现在来试试闭合下面的开关。我们会发现右边或非门的输入中有一个立刻变为1，其输出就相应地变为0，灯泡随之熄灭。左边或非门的输出此刻变为1。\n\n这时你再去断开下面的开关就会发现，灯泡一直处在熄灭状态。\n\n此时的电路状态与初始时是一样的。但是这次无论你怎么改变下面开关的状态，灯泡丝毫不受影响。我们将先前的情况一起总结一下：\n\n接通上面的开关，灯泡被点亮，断开此开关灯泡仍然亮着。\n\n接通下面的开关，灯泡被熄灭，断开此开关灯泡仍然不亮。\n\n电路的奇怪之处是：同样是在两个开关都断开的状态下，灯泡有时亮着，有时却不亮。当两个开关都断开时，电路有两个稳定态，这类电路统称为触发器（Flip-Flop)，Flip-Flop这个单词也可以有“沙滩鞋”或者是“政治策略”的意思。触发器是在1918年被发明的，发明者是英国无线电物理学家威廉姆·亨利·艾克里斯（1875-1966）和F.W.乔丹（信息不详）。\n\n166","previous_page":165,"next_page":167}