無限制自然數 的英文怎麼說
中文拼音 [wúxiànzhìzìránshǔ]
無限制自然數
英文
unlimited natural- 無 : 無Ⅰ動詞(沒有) not have; there is not; be without Ⅱ名詞1 (沒有) nothing; nil 2 (姓氏) a surn...
- 限 : Ⅰ名詞(指定的范圍; 限度) limit; bounds Ⅱ動詞(指定范圍, 不許超過) set a limit; limit; restrict
- 制 : Ⅰ動詞1 (製造) make; manufacture 2 (擬訂; 規定) draw up; establish 3 (用強力約束; 限定; 管束...
- 自 : Ⅰ代詞(自己) self; oneself; one s own Ⅱ副詞(自然;當然) certainly; of course; naturally; willin...
- 然 : Ⅰ形容詞(對; 不錯) right; correct Ⅱ代詞(如此; 這樣; 那樣) so; like that Ⅲ連詞[書面語] (然而)...
- 數 : 數副詞(屢次) frequently; repeatedly
- 限制 : place [impose] restrictions on [to]; astrict; restrict; limit; confine; shut down on [upon]: 限制...
- 自然 : 自然at ease; natural; free from affectation
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There are lots of non - linear systems in the nature. because classical and morden control methods have common limitation : mathematical model of the plant has to be known in advance. but in fact many plants are intricate uncentaintied and time - varying. in addition, they also are non - linear. though there are methods of system identification in control theories, the identification theories and ways of non - linear and time - varying system are not mature and systematic. it is very difficult to carry out effective real - time control. the neural networks can approximate random non - linear relations and study by itself, and it provides new thoughts and new ways for solving these problems
由於經典和現代控制方法存在一個共同的局限性:就是要求預先知道被控對象的數學模型,但實際上許多對象具有復雜的不確定性和時變性;此外還具有復雜的非線性。雖然在控制理論中有系統辨識的手段,但是對于非線性時變系統尚無成熟的和系統的辨識理論與方法,要實行有效的實時控制就很難了。人工神經元網路有表示任意非線性關系和自學習等能力,給解決這些問題提供了新思想和新方法。
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