{"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":113,"pdf_page":129,"physical_index":129,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"5b3ea24537bebd17dd1d1c92f487c75843dd915c2f7bb0c6932da826c76cf347"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"当电磁铁将金属簧片拉下来时，我们称继电器被“触发”（triggered)。当左边的开关断开的时候，铁芯的磁性消失，金属簧片回到原位。\n\n这看起来似乎是一种间接控制灯泡发光的方法，而实际上它就是这样的。如果我们只关心点亮开关，完全可以将继电器省略掉，但我们所关心的并不仅仅是点亮灯泡。我们还有更宏大的目标。\n\n在这一章中，（在逻辑门建立之前）我们将多次运用继电器，因此就需要将上面那幅电路图简化。我们可以利用接地的方式减少一些电线。在这种情况下，大地仅代表了一个公共端，并不是真正意义上的物理接地。\n\n这看起来并不像简化的结果，但到现在我们还没有完成。注意两节电池的负极都是接地的。因此，我们可以看到这样的符号。\n\n和第5章、第6章中一样，可以用大写字母V（代表电压）来代替上图中的电池。这样，继电器看上去就如下图所示。\n\n11门\n\n113","previous_page":112,"next_page":114}