dfc 中文意思是什麼

dfc 解釋
面向成本的設計
  1. Mr. niu also acknowledged the importance of the work with the dfc on milk quality and discussed the need to have a canadian model demonstration farm in one or two provinces to demonstrate canadian capability and performance

    牛根生先生說明了與加拿大奶農協會在牛奶質量上進行合作的重要性，並且討論了在一或兩個省建立加拿大模式示範農場的必要性，以展示加拿大的能力和成效。
  2. One is that the operation duty cycle can not be larger than 50 % because of the requirement for the transformer resetting. as a result, the voltage stress of the secondary diode is high, which limits the usage of dfc in high output voltage application

    但由於變壓器磁芯復位的需要，其工作占空比必須小於50 ，從而造成占空比利用率不高，變壓器副邊電壓高，副邊高頻整流二極體的電壓應力大。
  3. When adopting fea to model, dfc could not only apply into incremental approach with a fully coupled elastic and plastic damage model, but to one step inverse approach

    利用有限元方法模擬時，韌性斷裂準則既可以應用到完全耦合的彈塑性損傷模型的增量方法中，也可以應用到一步有限元逆演算法中。
  4. Then this paper pointed out that dfc could predict the forming limit of metal sheet with low plasticity well and meantime take the change of forming path into account

    指出利用韌性斷裂準則，不但能夠較好地預測塑性差的板料成形極限，而且還能考慮應變路徑的變化。
  5. This paper overviewed the prediction methods of forming limit in sheet metal forming, which included forming limit stress diagram, the maximum forming thinning ratio, forming limit diagram and ductile fracture criteria ( dfc )

    摘要對板料成形中的成形極限應力圖、最大變薄率、成形極限圖以及韌性斷裂準則等預測成形極限的方法，進行了綜述和分析。
  6. Double forward converter ( dfc ) has many advantages, such as inherent anti - break - though capability, auto clamping the switch voltage etc. regarding the excellent reliability, dfc is one the most widely used topology in the industrial applications, especially for low output voltage area, such as telecommunication energy systems and welding power supply

    雙管正激變換器具有內在抗橋臂直通的優點，能使開關管上的電壓自動箝位在輸入電源電壓。由於其可靠性高，電路設計簡單，因而成為目前在工業中應用最普遍的變換器結構之? ，特別是適合於輸出電壓較低應用場合，比如通信系統中的一次電源和弧焊電源。
  7. Barclays stepped in for dfc, a bankrupt new zealand mortgage bank in 1989, replacing it as a counterparty for all its interest - rate swaps

    1989年巴克萊銀行收購了一家破產的紐西蘭按揭銀行dfc ， ，並將它作為自己所有利率掉期額的交易商。
  8. In addition, as for the each influence factor on the doc, the advises is advanced which involve the aspects of aircraft design for cost ( dfc )

    針對各種影響因素，簡要提出了在面向成本的飛機設計過程中要注意的各個方面。
  9. We apply the thought and model to analyze the dfc company ' s financing project to illustrate how one can use this method and model rather than the conventional method

    同時結合實際融資案例分析了現實中結合上述思路思考的意義。本文的研究成果將為高新技術企業進行融資規劃提供系統科學的參考和借鑒。
  10. The optimization design of dfc is expounded and the concept and method of multiobjective optimization are used to the upper stage solid rocket motor ( cpkm ) of a kind of launching vehicle

    闡述了面向成本的優化設計問題，並將多目標優化概念和方法應用於某運載火箭上面級固體發動機（ cpkm ）方案設計。
  11. The paper researches on the control of chaos or hyperchaos via the method of the tune - delayed feedback control ( dfc ), the proportional periodic pulse perturbation to the system variables ( pp - sv ) and limiting amplitude

    本文主要對時間延遲反饋法（ dfc ） 、正比于系統變量的周期脈沖擾動法（ pp - sv ）及限幅法這三種控制混沌和超混沌系統的方法展開了研究工作。
  12. The forth part probes into the developing trend of otc distribution channel and put forwards the final measurements on the basis of the dfc mode, building of modern pharmacy flow system, and modern marketing methods

    第四部分對otc藥品分銷通路的發展趨勢進行分析，並提出從dfc分銷模式探索、現代醫藥物流體系的建設和經營手段現代化的加強等三方面應採取的對策與措施。
  13. Another is that dfc is also not suitable for high input voltage application, such as following the output of three phase power factor correction circuit, for the voltage stress of switch in dfc is equal to the input voltage

    另外，在高電壓、大功率應用領域，如三相pfc電路後面接的dc dc變換器，由於三相pfc電路輸出電壓較高，一般為800v左右。此時採用功率mos管作主管的雙管正激變換器則不能直接應用。
  14. First, study the concept and the key technology for dfc and analyze every factor influencing the products " cost within the products " life cycle ; second, set up the estimating model of products " cost based on the function to meet the modem products " design idea of the " top - down ", unifying the products " cost and structure on this functional concept ; third, based on the functionally estimating model of the products " cost, propose two grades of products " cost estimating method based on the function. the method can be used in the cost " estimation in the whole course of product design ; finally, regarding solidworks as the developing platform, delphi as the programming tool, structure a based on function - based products " cost estimating system to tentatively prove the practicability and feasibility of this text ' s estimating method

    第一，研究面向成本設計的概念和關鍵技術，面向產品全生命周期分析影響產品成本的各項因素；第二，建立基於功能的產品成本估算模型，以適應「自頂向下」的現代產品的設計理念，將產品成本與產品結構在功能這一概念上得到統一；第三，在基於功能的產品成本估算模型的基礎上，提出了基於功能的產品成本兩級估算方法，此方法可用於產品設計全過程中產品成本的估算；最後，以浙江工業大學碩士學位論文摘要solidworks為開發平臺， delphi為編程工具，初步構建了基於功能的產品成本估算系統，驗證了本文估算方法的實用性和可行性。
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