收針鏈節 的英文怎麼說
中文拼音 [shōuzhēnliànjié]
收針鏈節
英文
narrowing block-
Aim at the dtc ' s blemish mentioned above and the direction of dtc technique development, the dissertation put great emphasis on the work as follows, with an eye to exalt dtc system function : ( 1 ) a new speed - flux observer of an induction motor is proposed to enhance the accuracy of flux observing, which is an adaptive closed - loop flux observer and different from the traditions. a new adaptive speed - observation - way is deduced out according to the popov ' s stability theories ; ( 2 ) to improve the performance of dtc at low speed operation, we have to exalt the accuracy of the stator flux estimation and a new way of bp neural network based on extended pidbp algorithm is given to estimate and tune the stator resistance of an induction motor to increase the accuracy of the stator flux estimation ; ( 3 ) digital signal processor is adopted to realize digital control. an device of direct torque control system is designed for experiment using tms320lf2407 chip produced by ti company ; ( 4 ) bring up a distributed direct torque control system based on sercos bus, sercos stand for serial real time communication system agreement which is most in keeping with synchronous with moderate motor control ; ( 5 ) the basic design frame of the hardware and software of the whole control system is given here and some concrete problem in the experiments is described here in detail
針對上面提到的直接轉矩控制的缺陷和未來直接轉矩控制技術發展方向，本論文重點做了以下幾個方面的工作，目的在於提高dtc系統的綜合性能： （ 1 ）提出一種新型的速度磁鏈觀測器，新型的速度磁鏈觀測器採用自適應閉環磁鏈觀測器代替傳統的積分器從而提高磁鏈觀測的精度，並且根據popov超穩定性理論推導出轉速的新型自適應收斂律； （ 2 ）改善系統的低速運行性能，主要從提高低速時對定子磁鏈的估計精度入手，提出了一種提高定子磁鏈觀測精度的新思路? ?利用基於bp網路增廣pidbp學習演算法來實時在線地修正定子電阻參數； （ 3 ）採用數字信號處理器dsp實現系統全數字化硬體控制，結合ti公司生產的tms320lf2407晶元，設計了直接轉矩控制系統的實驗裝置； （ 4 ）提出了基於sercos總線網路化分散式的直接轉矩控制系統， sercos （ serialrealtimecommunicationsystem ）是目前最適合同步和協調控制的串列實時通信協議； （ 5 ）基本勾勒出整個控制系統的硬體和軟體設計基本框架，詳細描述一些實驗中的具體的細節問題。Reference counting is simple, lends itself well to incremental collection, and the collection process tends to have good locality of reference, but it is rarely used in production garbage collectors for a number of reasons, such as its inability to reclaim unreachable cyclic structures objects that reference each other directly or indirectly, like a circularly linked list or a tree that contains back - pointers to the parent node
引用計數很簡單，很適用於增量收集，收集過程一般會得到好的引用區域性，但是出於幾個理由，它很少在生產垃圾收集器中使用，如它不能回收不可到達的循環結構（彼此直接或者間接引用的幾個對象，如循環鏈接的列表或者包含指向父節點的反向指針的樹） 。By utilizing " the theory on value chain ", the thesis advances that the strategic segment of the value chain in the bio - pharmaceutical industry is innovation of the bio - medical products, while the foothold of the product innovation lays on know - how researching and developing functional genes. thus the thesis proposes that under the premises of full understanding and grasping characteristics of the industry and corresponding products could investors give full play to their own advantages to date and collaborate the strong with mutual benefit meanwhile, investors would draw up purposeful investment strategy and build up flexible and effective guarantee system of investments. therefore, it would help the future investors not only to build up core competition capacity of their own in the long run, but also to grasp the investment opportunities more accurately, make their investment action more reasonable, lower the investment risks further and get richer return on investment
論文在對國內外生物醫藥行業發展現狀進行多方位分析、總結的基礎上，針對我國目前該行業中投資存在的「投資領域過于集中、投資者在思想認識、資金實力和投資方向方面與行業特點存在著較大的差距、風險投資環境尚未健全、運作管理相對滯后」等問題，利用「價值鏈理論」對該行業的投資機會加以分析，提出了「生物醫藥產業價值鏈的戰略環節為產品創新，而產品創新的立足點在於研發功能基因等專有技術」等觀點，建議投資者應在充分理解、把握生物醫藥行業及生物技術產品特點的前提下，根據目前自身的優勢，強強聯合、優勢互補，制定有針對性的投資戰略、配之靈活有效的投資保障體系，從而構建自身未來的核心競爭能力，以使未來此領域投資者的投資機會更準把握，投資行為更趨理智，投資風險更為降低，投資收益更加豐厚。
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