顯象密度計 的英文怎麼說
中文拼音 [xiǎnxiàngmìdùjì]
顯象密度計
英文
densitometer-
From above analysis, the thesis gets conclusions as following : ( 1 ) the frequencies of multi - tower building are so dense and the coupling in each mode is so evident that the cqc method instead of srss should be used to calculate the seismic action effect ; ( 2 ) torsion effects is distinct between the modes of asymmetry multi - tower structure and it is necessary to take translation - torsion coupling into account ; ( 3 ) the effect of the enlarged base rigid on the seismic properties is very big, the rigid ratio of the enlarged base to towers in asymmetry multi - tower structure should be designed in a proper range ; ( 4 ) the distribution of plane rigid is asymmetry because of the asymmetry layout of towers. the torsion effects of structure not only result in large torsion internal force in vertical element resisting lateral displacement, but also make large influences on the stress of transfer plate and near floors, thus it is necessary to strengthen those floors
通過上述分析，得出以下主要結論：多塔樓結構存在頻率密集現象，各振型間耦聯效應明顯，地震作用計算應採用cqc組合原則而不能簡單地採用srss組合原則；非對稱多塔結構的振型中，扭轉作用明顯，平扭耦聯效應值得考慮；裙樓剛度對整體結構的抗震性能影響很大，非對稱多塔結構宜控制裙樓與塔樓剛度比在適宜的范圍；非對稱多塔易導致平面剛度分佈不均勻，結構扭轉效應不僅在豎向抗側構件中引起較大的扭轉內力，對轉換層樓板應力有較大的影響，且延續至相鄰樓層，對相應樓層均應採取相應的加強措施。In order to deal with the nonlinearity and hysteresis of piezoceramics, a precise power amplifier circuit with charge - feedback loop was developed. and an electromechanical model of piezoelectric actuator is presented to demonstrate that charge - feedback control is prominently effective to reduce hysteresis, creep and to improve linearity
本文針對壓電陶瓷存在非線性與滯后的問題，根據電荷反饋原理設計了精密功率放大電路和電荷反饋迴路;建立了壓電作動器的機電模型，證明了電荷反饋控制對于減小回滯現象、提高線性度有明顯的作用。Laser - scanned on - line inspection system ( lois ) involving laser, optics, electronics, fine mechanics, opto - electronic transformation and computer etc, is used to realize high speed and accuracy, non - contact and on - line inspection for rotating body types of parts, in the system, a visible laser is taken as its light source, the geometric parameter of the measured object is transformed into the electrical signals by a scanning optical system and an opto - electronic transformation system, the measured result is given and displayed by the computer real - time data processing
激光掃描在線檢測系統是一種基於激光技術、光學、電子學、精密機械、光電傳感技術及計算機等多學科技術於一體的高精度、高速度、非接觸在線檢測系統。它是用可見激光作為光源，把被測對象的幾何尺寸經過掃描光學系統和光電變換系統轉變成電信號，再由計算機進行實時數據處理。給出測量結果，並數字顯示。
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