直積代數 的英文怎麼說
中文拼音 [zhíjīdàishǔ]
直積代數
英文
direct product algebra-
Third, it is this " moment " of the segment of space - time which based on the the philosophy of the nature and describing the mechanical movement that symbolize the transform from the view of integralization in classical atomism of mathematics to the view of integralization of modern real number
另外，正是基於新的自然哲學的、作為描述機械運動的時空片段的「瞬」標志著古典數學原子論的積分觀向現代的分割實數連續統的積分觀的轉化，而現代數學的微分概念更是直接源於描述機械運動的速度和與運動軌跡密切相關的曲線的切線問題。So we say that we can absolutely avoid unnecessary and bothering process in mathematic deducibility if making full use of the method of pseudo - spectral in more complex viscoelastic media, we can get wave equation when directly replacing with two kinds of relaxation modules
由此可以說，如果採用偽譜法模擬其它更復雜的粘彈介質模型時，完全可以避免不必要的而且煩雜的數學推導過程；直接將體積鬆弛模量和剪切鬆弛模量代入即可得其波動方程。This article proves that a finite cyclic group can be isomorphically represented by direct product of some cyclic groups
摘要本文運用基礎代數中有關循環群、直積、同構等理論，證明了一個循環群可以用另一組循環群的直積形式來同構表示。In the opinion of the article, the sweet fruit of mathematical teaching is n ' t the mathematical content which students have acquired directly in class but the mathematical thought and method behind the knowledge which students have had a true grasp and master, and improving the teaching of mathematical thought and method is the key of making the high school mathematical enducation modernizing. the article has adequately connected the theroy with the practice, it will make our maths teacher obtain revelation and enhancing, and play an important part to the mathematical teaching in high school
本文認為，好的數學教學成果不是課堂上直接教給學生的數學內容本身，而是使學生領會和掌握的隱含在課本內容背後的數學思想方法，加強數學思想方法教學是中學數學教育現代化的關鍵。本文很好地做到理論與實踐的結合，將對我們的數學教師有啟示與提高作用，對中學數學教學將產生積極的影響。With the numerical iteration method we use the hnc integral equations to calculate the direct correlation function c ( r, t, p ) and the total correlation function h ( r, t, p ) in a soft - sphere ionic fluid which something like the system of the alkali - metal salts
我們採用迭代方法用超網鏈積分方程組計算了一種類似於堿金屬鹽的軟球離子液體系統的直接關聯函數c （ （ ? ） ， t ， ）和總關聯函數h （ （ ? ） ， t ， ） 。Vertical pendulum tiltmeter, which is the third generation continuous observation instrument of earth crust deformation, processes digital function. its features are small size high precision fine stability and digitize
高精度垂直擺傾斜儀是第三代具有數字化功能的地殼形變連續觀測儀器，其特點是體積小、高精度、高穩定性和數字化。The neogene is a key stage of terrestrial environmental evolution in yunnan. three stratigraphic sections including luhe ( late miocene ), yangyi and longling ( late pliocene ) were selected to reconstruct vertical landscape of paleovegetation in these areas, based on palynological data. according to principle of the coexistence approach, seven quantitative paleoclimatic parameters of each deposit area were obtained by using meteorological data ( 1951 - 1980 ) of the distribution area of extant taxa found each palynoflora in china
晚第三紀是雲南地區環境演變過程中的關鍵地質歷史時段，本論文以晚第三紀晚中新世（呂合） 、晚上新世（羊邑和龍陵）地層中的孢粉為研究對象，結合同層位大化石植物證據，參照現代植被，恢復了雲南三個化石出產地區的古植被垂直分佈景觀，並定性地描述了古氣候；同時運用共存分析方法（ theco - existenceapproach ）定量化地重建了三個地區的古氣候參數值；初步推測了沉積地可能的古海拔。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。The loading effects of the atmosphere are the sum of the direct effect, which comes from its newtonian attraction to any point on the surface or within the interior of the earth, and the indirect effects, which is induced by the earth ' s deformation and additional gravitational potential arising from redistribution of the mass because it can be regarded as the surface loads. they are traditionally expressed as the convolution integration of the atmospheric green ' s function, which is virtually the sum of the elastic and gravitational green ' s functions, and the measured values of the barometric pressure on the earth ' s surface over the globe
隨著現代大地測量技術和數據分析手段的日益提高，大氣對各類物理場地表觀測的負荷影響必須予以考慮，大氣的負荷效應為直接效應（大氣對地球表面及內部點產生直接吸引）和間接效應（大氣作為表面負荷作用於地球，導致地球的彈性形變和內部質量的重新分佈，產生附加位）之和，習慣上表示為大氣格林函數（彈性項和直接引力項格林函數之和）和地表氣壓觀測值的全球褶積積分The epd s water monitoring programme from the 1980s onward had mostly focused on physico - chemical parameters of marine water and sediment. biomonitoring had been restricted to the monitoring of sewage bacteria and phytoplankton as part of the general marine water quality monitoring. there had been no monitoring of effects of toxic pollution on marine organisms
本署自八十年代開始實行水質監測計劃，一直以海水及沉積物的物理及化學參數為主，生物參數只限於污水細菌及浮游植物的監測，污染對海洋生物的影響並不包括在監察項目內。Direct product and congruence of weakly dicomplemented lattice
弱雙補代數的直積和同余Topics include : mathematical formulations ; finite difference and finite volume discretizations ; finite element discretizations ; boundary element discretizations ; direct and iterative solution methods
課程主題有：數學列式、有限差分與有限體積離散、有限元素離散、邊界元素離散、直接與疊代解法。Firstly, this paper summarizes modern weaponry stealth technology at home and abroad, and lays special emphasis on analyzing stealth problem of cruise missile ’ s guidance head cover, aerocraft radar canopy and other privileged sites. secondly it makes a research on related theories of transparent metallic mesh that applied to missile ’ s guidance head cover and aerocraft radar canopy, and deduces relational expression between transparent metallic mesh structural parameters and radar wave - shielding efficiency, infrared transmitting. we use laser direct writing technique to fabricate a metallic mesh ( dimension : 70mm 70mm ; line width : 5 m ; period : 350 m ) on glass surface, then do experiment to test radar wave - shielding of metallic mesh via radar transmitting and receiving device
本文首先綜述了國內外現代武器系統隱身技術方法;重點對巡航導彈導引頭罩和飛機雷達艙罩等特殊部位的隱身問題進行了研究，研究了金屬網柵用於導彈頭罩和飛機雷達艙罩隱身的相關理論，推導了金屬網柵結構參數對雷達波屏蔽效率和透紅外關系式;用激光直寫工藝，在玻璃表面上製作了一塊面積為70mm 70mm ，線寬為5 m ，線周期為350 m的金屬網柵;在實驗室里用雷達發射和接收裝置測試了網柵對雷達波的屏蔽實驗;認為利用金屬網柵技術對雷達波具有一定的屏蔽作用，而且不影響精確制導的紅外線高效透過。Instead, there needs to store only the original coefficient matrix, some auxiliary matrices for the preconditioner and several vectors in the iteration methods. further, the core of the iteration is the matrix - vector multiplication and the solution of the auxiliary equations corresponding to the preconditioner. if the solution of the auxiliaries spend not very much, the computational cost in each iteration step will be very cheap, due to the fact that the sparsity of the matrix can be exploited sufficiently
與直接法相比，迭代法只需存儲原系數矩陣、對應于預處理的幾個輔助矩陣與少量幾個向量，且迭代中除求解輔助線性方程組外，其餘的計算主要是稀疏矩陣與向量乘積，從而能充分利用稀疏性減少計算量，但迭代法的收斂速度一般與系數矩陣的譜分佈有關。Year of china digi tal entertainment expo & conference will obtain hall 1 and hall 2 which is 11, 500 sqm each, pillar - free and 11 meters high limits will give more room to exhibitors for booth design. supply canals underneath the floor connected directly to the booths, providing on - site all necessary utilities including power, gas, water, compressed air and various modern telecommunications including isdn, adsl, wireless broadband network and satellite tv
第二屆中國國際數碼互動娛樂產品及技術應用展覽會將使用面積為11500平米的一號、二號展館。展館為無柱式結構，凈高度11米，展館地槽內鋪設有後勤供應管道，直接連接展位，現場提供所需的電力、壓縮空氣和各種現代化通訊設施包括isdn 、 adsl 、無線寬帶網和衛星電視。Through the statistics and analysis of runoff and amount of sand lost in the downstream of weihe in recent years, it is discovered that in the downstream of weihe the magnitude sand season was ahead of the main flood season relatively within the year ; variation tendency of annual runoff and amount of sand lost was identical basically, and the quantity of water and sand at huaxian gauging station was tailing - off continuously from the 1960 to 2005 ; there was direct relation between the situation of rushing or silting deposits and rainfall at this section of the river : the river depositing in the year which is rich rainfall, the eroding in the poor rainfall
摘要本文通過對近6年渭河下游水沙量數據的統計和分析得出，渭河下遊河段年內多沙期較河流主汛期有所提前；年徑流量和年輸沙量的變化趨勢基本一致，而且自60年代至2005年華縣站的水沙量持續呈遞減趨勢；河流的沖淤情況與該河段的降雨量有著直接的關系，當年平均降雨量小的時候河流以淤積為主，當年平均降雨量大的時候河流以沖蝕為主。Our company possesses modernized workshop of 50 thousand sq meters, large - sized vacuum plastic - molding equipment, high - efficient electronic plate saw and full - automatic spray - coating production line and hundreds of employees and technicians. since foundation, the company has been engaged on manufacturing and research of pvc vacuum plastic molding, owning rich experience on this aspect accordingly
公司擁有面積達50000平方米的現代化廠房，大型的真空吸塑設備，高效率的電子開料鋸，全自動化噴塗生產線，數百名員工及技術人員，建廠以來，一直從事pvc真空吸塑的生產研究，使這方面有著豐富的經驗。Then, we study the case of finite boolean algebra based on the fact that any finite boolean algebra is the direct product of a finite number of binary boolean algebra
然後，基於有限布爾代數是二元布爾代數的有限直積這一事實，討論了有限布爾代數上的情況The integral equations for determining the unknown forces can be transformed into algebraic equations and solved numerically
採用直接離散的方法將定解積分方程組轉化為線形代數方程組計算求解。The inner product of the mapping value of the original data in feature space is replaced by a kernel function, and the weights of each neuron can be initialized and updated by initializing and updating the combinatorial coefficient vector of each weight in the algorithm of ksom, so some intuitive and simple iteration formulas are obtained
該演算法以核函數代替原始數據在特徵空間中映射值的內積，並且神經元權值向量的初始化和更新都可由其組合系數向量表示，從而獲得了直觀而簡單的迭代公式。分享友人