物態逆變 的英文怎麼說
中文拼音 [wùtàinìbiàn]
物態逆變
英文
reversibility of state-
The chinese word wuli was first examined in literature of the warring states period. according to its wide use in ancient china, the word refers in general to the principle of all objects or the natural laws. in ancient times the meaning of wuli is similar to physics in the west. the translation of the english word physics was made some alterations in the introduction of western science during the ming and qing dynasties. from the 17th to the early 19th century, some chinese books on physics translated by protestant missionnaries were annotated and translated in japan. after the sino - japanese war reversed the flow of knowledge between china and japan. from the second half of the 19th century to the early years of the 20th century, the translation of the english word physics was defined early or late in japan and china. now the range and object of physical research are continually changing along with the rapid development of modern physics
「物理」一詞，在中國古代最早見于戰國，此後在各種典籍中被廣泛使用，其含義泛指萬物之理與自然規律，這種含義與西方古代「物理」一詞的含義相近.明清時期西學東漸， 「物理」一詞的翻譯幾經變化.古代日本的科學在相當程度上受到中國的影響， 17世紀至19世紀上半葉來華傳教士譯述的物理書籍也在日本被注釋翻譯.甲午戰爭后，中日兩國之間科技交流的態勢發生了逆轉. 19世紀下半葉至20世紀初，日中兩國「物理」一詞的譯名先後確定.隨著現代物理學的迅速發展，物理學研究的范圍和對象又在不斷地變化Er fluids, as a kind of smart material, possibly be revolutionary in several areas of industry and technology due to their attractive features of rapid ( within ms order ), reversible and dramatic changes in rheologic properties upon applied electric field of kilo - voltage per millimeter order
電流變體在外加電場作用下能在毫秒級時間內發生明顯的、可逆的流變響應，從而被認為是「有可能使諸多工業部門發生變革的一種智能材料」 ，它是材料科學和液態物理等領域的一大研究熱點和學科前沿。In dtc system, the concept of space vector is introduced to analyze and control the ac motor, the electromagnetic torque and flux are calculated and controlled in the stationary coordinate, and the optimal pwm gating signals are generated to control the inverter to acquire high dynamic torque according to the output of the bang - bang regulators
直接轉矩控制採用空間矢量的概念來分析三相異步交流電動機的數學模型和各物理量，直接在靜止坐標系下計算與控制交流電動機轉矩和磁鏈，藉助于離散的兩點式調節產生pwm信號，直接對逆變器的開關狀態進行最佳控制，以獲得轉矩的高動態性能。Rapl belongs to ras superfamily of small gtp - binding proteins, which is considered to control cell growth, differentiation and survival. rapl was regarded as an antagonist of ras because it can revert the phenotype of oncogene ras transformed cells. recent researches show that rapl has its ras - independent functions in a variety of cellular systems besides its effect as an antagonist of ras
Rap1除具有逆轉原癌基因ras激活突變體所導致的細胞形態改變而被認為是ras的拮抗物外，最近的研究還發現rap1在一系列的細胞系統中有獨立於ras之外的功能，如控制與細胞粘附有關的事件等，因而成為研究的熱點。In dtc system, the concept of space vector is introduced to analyze and control the ac motor, the electromagnetic torque and flux are caculated and controlled in the stator reference frame, and the optimal pwm gating signas are generated to control the inverter according to the output of the bang - bang regulator. in this paper, the dtc system is designed based on dsp. a speed estimation method is derived detailedly and the sensorless speed close - loop control is conducted. in this system, there are some problems, such as flux drift and torque ripple. to resolve these problem, a modified flux caculation method and some measures such as speed lpf, torque slide filtering are adopted. the system performance is enhanced by these mersures
直接轉矩控制採用空間矢量的概念來分析異步電機的數學模型和控制其各物理量，直接在定子坐標系中計算和控制轉矩和磁通，藉助于離散的兩點式調節（ bang - bang控制）產生pwm信號，直接對逆變器的開關狀態進行優化控制，以獲得轉矩的高動態性能。本文採用dsp設計了直接轉矩控制系統，詳細推導了速度估計方法，進行了無速度傳感器的速度閉環控制。分享友人