length-preserving 中文意思是什麼
length-preserving
解釋
等距的- length : n. 1. 長，長度，長短。2. （時間的）長短，期間。3. （賽艇的）一艇的長度；一馬的長度。4. 程度，范圍。5. 【板球】球程；投至適當距離的球。6. 【語言學】音長。7. 一段，一節。
- preserving : 保存
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This paper investigates the closure property of sublogarithmic space - bounded 1 - inkdot alternating pushdown automata with only existential universal states, and shows, for example, that for any function l such that l loglogn and l o, the class of sets accepted by weakly strongly l space - bounded 1 - inkdot two - way alternating pushdown automata with only existential universal states is not closed under concatenation with regular sets, length - preserving homomorphism, and kleene closure
Chandra kozen和stockmeyer提出了交替性alternation作為并行計算的一個理論模型。交替式alternating圖靈機是非確定性圖靈機的推廣，它的狀態集合被分為萬能狀態universal state和存在狀態existential state 。非確定性圖靈機可看作只有存在狀態的交替式圖靈機。 -
Such ciphers permit length - preserving encryption of a data stream with only a single pass through the data
這些加密方法使得對只有單一輸入數據的數據流實施保持長度不變的加密成為可能。
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