閉子代數 的英文怎麼說
中文拼音 [bìzidàishǔ]
閉子代數
英文
closed subalgebra-
Let k be an algebraically closed field and a be a commutative associative algebra with an identity element 1
設a是代數閉域k上具有單位元1的交換結合代數， d是由a的可交換的k -導子所張成的k -線性空間。The cartesian closed properties of some distributive domains are obtained, such as the categories of distributive meet - continuous semi - lattices, distributive continuous complete semi - lattices, distributive algebraic complete semi - lattices ( distributive scott domains ). generally, we have that the categorical products are cartesian products and the exponential objects are in fact the function spaces of stable functions under stable orders in any full subcategory of slp
得到了以穩定映射為態射的完備半格範疇、連續完備半格範疇、代數完備半格範疇都不是笛卡爾閉的，而以分配的交連續完備半格、分配的cos 、分配的scottdomain等為對象的slp的滿子范疇是笛卡爾閉的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。We first present the decomposition of finite rank operators and trace class operators in a weakly closed nest algebra algn - module. secondly, the same question for finite rank operators in the preanm ' hilator of an atomic boolean lattice algebra is considered. ( 6 ) let n be a nest on a hilbert space h. and u be any weakly closed algn - module
在第三章中，我們首先討論了弱閉套代數模中的有限秩運算元和跡類運算元的「保跡范數可加性分解」問題，然後研究了原子boolean格代數的預零化子中的有限秩運算元，得到（ 6 ）設n是hilbert空間h中的一個套， u是任一弱閉algn -模。A time scale t is an arbitrary nonempty closed subset of the real numbers. in the paper, we study quasilinearization and the monotone iteration methods for second - order nonlinear boundary value problems on time scales
時間模t _ 1是實數集上的一個非空閉子集，本文討論了時間模上二階非線性邊值問題的擬線性方法和單調迭代方法。Millions of germans want to end their exposure to atomic power, hence the agreement back in june 2000 by the main political parties and thenuclear industry to shorten the life of the country ' s 17 plants and shut themall down by around 2020
自從2000年6月份德國主要政黨與核工業代表達成了縮短全國17個核電廠的壽命以及到2020年全部關閉的協議之後，數以百萬計的德國人想結束暴露于原子能之下的危險。分享友人