第365行: |
第365行: |
| * There will need to be many decisions on what the symbols actually look like, and a failproof way of reading and writing symbols indefinitely. | | * There will need to be many decisions on what the symbols actually look like, and a failproof way of reading and writing symbols indefinitely. |
| | | |
− | 符号到底是什么样子的,需要有很多决定,也需要有一种万无一失的方法来无限期地读写符号。
| + | 符号到底是什么样子的,需要有很多决策,也需要有一种万无一失的方法来无限期地读写符号。 |
| | | |
| * The shift left and shift right operations may shift the tape head across the tape, but when actually building a Turing machine it is more practical to make the tape slide back and forth under the head instead. | | * The shift left and shift right operations may shift the tape head across the tape, but when actually building a Turing machine it is more practical to make the tape slide back and forth under the head instead. |
第397行: |
第397行: |
| ( current state q<sub>i</sub> , symbol scanned S<sub>j</sub> , print symbol S<sub>k</sub>/erase E/none N , move_tape_one_square left L/right R/none N , new state q<sub>m</sub> ) | | ( current state q<sub>i</sub> , symbol scanned S<sub>j</sub> , print symbol S<sub>k</sub>/erase E/none N , move_tape_one_square left L/right R/none N , new state q<sub>m</sub> ) |
| | | |
− | (当前状态 q<sub>i</sub> , 已扫描 符号S<sub>j</sub> , 打印符号S<sub>k</sub>/擦除 E/无 N , move_tape_one_square left L/right R/none N , 新状态 q<sub>m</sub> ) | + | (当前状态 q<sub>i</sub> , 已扫描符号S<sub>j</sub> , 打印符号S<sub>k</sub>/擦除 E/无 N , move_tape_one_square left L/right R/none N , 新状态 q<sub>m</sub> ) |
| | | |
| | | |
第765行: |
第765行: |
| | | |
| “计算进度 "图显示了三态穷忙从开始到结束的计算过程中的 "状态"(指令)进度。最右边是每一步的图灵 "完整配置"(Kleene "情况",Hopcroft-Ullman "瞬时描述")。如果机器被停止并清空 "状态寄存器 "和整个磁带,则可以使用这些“配置”在其进行中的任何地方重新启动计算(参见Turing(1936)The Undecidable 第139– 140页)。 | | “计算进度 "图显示了三态穷忙从开始到结束的计算过程中的 "状态"(指令)进度。最右边是每一步的图灵 "完整配置"(Kleene "情况",Hopcroft-Ullman "瞬时描述")。如果机器被停止并清空 "状态寄存器 "和整个磁带,则可以使用这些“配置”在其进行中的任何地方重新启动计算(参见Turing(1936)The Undecidable 第139– 140页)。 |
− |
| |
| | | |
| ==Models equivalent to the Turing machine model== | | ==Models equivalent to the Turing machine model== |