Yahoo Answers: Answers and Comments for Thirdoctavemode的意思 [語言]
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From Anonymous
enUS
Sun, 30 Dec 2012 14:07:51 +0000
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Yahoo Answers: Answers and Comments for Thirdoctavemode的意思 [語言]
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https://answers.yahoo.com/question/index?qid=20121230000010KK02040
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From DaSaGwa: I cannot type Chinese, so I have found a close...
https://answers.yahoo.com/question/index?qid=20121230000010KK02040
https://answers.yahoo.com/question/index?qid=20121230000010KK02040
Mon, 31 Dec 2012 02:51:43 +0000
I cannot type Chinese, so I have found a close explanation for "octave" (倍频程).
倍频程:
倍頻程是指兩個頻率之比為2:1的頻程。人耳可聞的聲音、頻率在20~20000HZ之間，而其中心頻率為31.5、 63、 125、 250、 500、 1000、 2000、 4000, 8000、16000HZ。在嗓聲控制的現場測試中，通常它只用63~8000HZ分為8個倍頻程。用它來表示某個寬廣的聲頻範圍。
The above explanation is for human ears. The question you have is for a rolling machine. This kind of machine, when in operation, can also produce "octave". (due to vibration, or oscillation). It will also have similar "central frequency" for octave. Hence,
"thirdoctavemode" means the third central frequency (第三倍频程模式), take above octave frequency for human ears as an example, it will be "250Hz". For a rolling machine, it is between 125Hz and 240Hz.
This problem is from a rolling machine. The reason people want to study "thirdoctavemode" is because it causes the most damage to the machine itself and produces an uneven surface of the rolled steel. The next octave to study is "fifthoctavemode". However, "fifthoctavemode" can be suppressed much earlier than "thirdoctavemode".
If you want to know more about octave (倍頻程), you can refer to
http://labs.chinamobile.com/know/29564

From 傻瓜、我喜歡你、好嗎: A general secondorder system is used here, fo...
https://answers.yahoo.com/question/index?qid=20121230000010KK02040
https://answers.yahoo.com/question/index?qid=20121230000010KK02040
Sun, 30 Dec 2012 14:11:52 +0000
A general secondorder system is used here, for simplicity, to represent the mill stand dynamics to study thirdoctavemode chatter.的意思是(一般的二階系統，為簡單起見，這裡使用的是，代表軋機機架的動力學研究3倍頻程模式的喋喋不休。)
thirdoctavemode的意思是(3倍頻程模式)