穩性證書 的英文怎麼說

中文拼音 [wěnxìngzhèngshū]
穩性證書 英文
stability letter
  • 穩 : 形容詞1 （穩定; 穩當） steady; stable; firm 2 （穩重） steady; staid; sedate 3 （穩妥） sure; rel...
  • 性 : Ⅰ名詞1 （性格） nature; character; disposition 2 （性能; 性質） property; quality 3 （性別） sex ...
  • 證 : Ⅰ動詞（證明） prove; verify; demonstrate Ⅱ名詞1 （證據） evidence; proof; testimony; witness 2 （...
  • 書 : Ⅰ動詞（寫字; 記錄; 書寫） write Ⅱ名詞1 （字體） style of calligraphy; script:楷書 regular script2...
  • 證書 : certificate; credentials
  1. The stability of electric power system has been being focused for a long time toprevent a power system from losing synchronism after sudden fault ， researchers have done much work and got many accomplishments this paper applied the direct feedback linearization ( dfl ) technique on the power system ， a strong nonlinear system simulation results by matlab proved this method efficiency main works and results are as follows ： this paper compared some existing methods in excitation control ， fast valve control and coordinated control respectively, analyzed the developments and actuality of nonlinear control research in brief, illustrated why ransient stability could be greatly improved by using the fast valve control in chapter 3 ， indicated the importance of coordinated control farther this paper introduced the inverse system theory, based on which ， discussed the dfl theory, pointed out which had consistency with the inverse theory, expanded the dfl theory combined the idiographic model equations ， made which adapt to the model of a single machine - infinite bus power system this paper referenced abundance articles and educed a set of equations ， which could describe the dynamical process of excitation and fast valve control for synchronous generators in the equations ， there were several very important parameters of power system - - rotor angle ( ) ， rotor speed ( ) ， generator q axis voltage ( eq ) ， transient voltage ( e ' q ) ， active power ( pe ) ， mechanical input power ( pm ) ， valve opening ( ) ， generator terminal voltage ( vt ) ， based on the model ， nonlinear coordinated controller and terminal voltage optimal controller have been designed by using the expanded dfl theory and lq optimal control theory the simulation results showed that the controller could keep power system transiently stable under the effects of a symmetrical 3 - phase short circuit fault ， which achieved better postfault regulation compared with another two routine methods ， one is the proportion excitation controller and proportion fast valve controller, the other is the proportion excitation controller and the optimal fast valve controller, which could exert good performance when met 1ittle disturbance either

    在介紹逆系統理論的基礎上，詳細介紹了dfl理論，通過比較闡明了dfl理論其本質是逆系統方法的一類，並結合具體課題推導出的模型方程將dfl理論進行了擴展，使之適應于電力系統這個強非線性對象。通過參考大量的書籍文獻推導出一套實用的可將大型汽輪發電機勵磁與汽門綜合起來進行控制的模型方程，此模型方程涵蓋了電力系統中特別引人注目的幾個量- -轉子角、轉子轉速、發電機q軸電勢eq 、暫態電勢e ' q 、有功功率pe 、機械功率pm 、汽門開度、機端電壓vt ，在此基礎上建立了實用的電力系統簡化的數學模型，並將擴展的dfl理論應用於此模型系統，結合線性二次型最優控制理論設計出大型汽輪發電機的非線性綜合控制器及機端電壓最優控制器，通過模擬實驗與採用常規的按電壓偏差進行調節的比例式勵磁控制器+汽門比例控制及採用常規的按電壓偏差進行調節的比例式勵磁調節器和基於二次型性能指標設計的最優快控汽門（考慮發電機的飽和因素）進行了對比，證實了採用此種控制器可以有效地提高電力系統的暫態穩定性，並且在電力系統遭受小干擾時同樣具有良好的調節性能。
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    公司研製開發的聚四氟乙烯模壓板，各項指標均優于國家和交通部頒布的質量標準，榮獲「第十屆中國新技術，新產品博覽會金獎」 ，並獲得「河北省高新技術產品證書」開發的ptfe薄膜產品採用進口樹脂，各項指標均優于部頒標準，性能穩定，質量上乘，榮獲「第十屆中國專利新技術新產品博覽會金獎」和「河北省高新技術產品證書」 。
  3. Such appointed person should submit to the building authority the proposal together with corresponding structural justification demonstrating the stability of the mechanised car parking system and structural adequacy of the building in which the system is to be installed

    獲委任人須向建築事務監督提交建議書及有關的結構數據，證明該機械泊車系統的穩固性，以及安裝該系統的樓宇在結構上足以承受此系統的運作。
  4. In every corner of the world, regardless of your project where we will be able to provide you with the same formula, product brochures ; products, as long as you choose a paint company internationally renowned industrial protective lacquer sector products, we can assure you of the quality of high - performance products and services

    無論在世界的哪個角落，不管您的項目在哪裡，我們都能向您提供配方相同，產品說明書統一的產品，只要您選擇了國際知名油漆公司工業防護漆部門的產品，我們就能保證向您提供質量穩定的高性能產品及服務！
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