正定二次型 的英文怎麼說

中文拼音 [zhēngdìngèrcìxíng]
正定二次型 英文
positive definite quadratic form
  • 正 : 正名詞（正月） the first month of the lunar year; the first moon
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 二 : Ⅰ數詞（一加一后所得） two Ⅱ形容詞（兩樣） different
  • 次 : Ⅰ名詞1 （次序; 等第） order; sequence 2 [書面語] （出外遠行時停留的處所） stopping place on a jou...
  1. We have observed the following characteristics of anatomical structure and development : ( 1 ) the primary roots belong to archetype and the lateral roots occur in the position toward the xylem of the vascular cylinder ; ( 2 ) the root endodermis consists of thicken casparian strips, and there are from two lo four layers parenchyma cells near the pericycle ; ( 3 ) the pith and resins canals are absent in the toots ; ( 4 ) secondary structure occurs in the root hair zone, and vascular cambium is formed from the parenchyma cells between the primary xylem and primary phloem ; ( 5 ) tanning materials are abundant in pericycle cells and phelloderm cells ; ( 6 ) sclereids are found in secondary phloem, and rays are rather rich in secondary xylem

    結果表明：氣生不定根具有以下結構特徵和發育特點： （ 1 ）根為二原型，側根正對著木質部發生； （ 2 ）幼根內皮層細胞具凱氏帶加厚，維管柱內緊挨中柱鞘內側具有2 ~ 4層大型薄壁細胞； （ 2 ）根中無髓和樹脂道； （ 4 ）次生結構發生於根毛區，維管形成層由初生木質部和初生韌皮部之間的薄壁細胞轉化形成； （ 5 ）中柱鞘和栓內層細胞富含單寧類物質； （ 6 ）次生韌皮部有石細胞，次生木質部射線發達。
  2. A new method on the decision of positive definite quadratic form using the real square matrices

    利用實方陣判定二次型正定性的新方法
  3. Secondly, this paper presents a new fuzzy modeling based on t - s fuzzy model, which calculates the membership grade of each fuzzy subspace using fuzzy partition of input space, the consequence parameter identification is obtained by orthogonal least square

    其次，提出了一種新的基於t - s模糊模型的建模方法。該方法是基於輸入空間的模糊劃分計算給定樣本在各模糊子空間的隸屬度，利用正交最小二乘演算法辨識模糊模型的結論參數。
  4. With the development of automobile industry and road transportation ， the traffic accidents happen every day in the world and become a serious society problem the vehicle collision accidents are over 2 / 3 times as much as all traffic accidents they cause a large amount of social infuence and serious economic loss therefore ， it is urgent to study vehicle collision accidents comprehensively and systematically ， and the research also is the academic foundation to analyze and deal with traffic accident it is difficult to authenticate car velocity after traffic accident to dig over locate witness is right way mechanics is avaid tool in this field it is important to establish math model and this is precondition to calculate vehicle velocity firstly on the basis of summarizing the research results ， this paper deeply discusses the calculating model to analyze the instantaneous motion state in the vehicle collision, the interrelation among the every moving mechanics parameters in the every phase of the collision secondly ， according to the collinear collision and two - dimension collision and the restitution coefficient ， the paper estabishesthe post collision movement models it proves that these models are correct and valid thirdly ， this paper try to research reconstruction of road traffic accident and put forward the method on it

    對交通事故的科學分析應是建立在正確的數學模型與計算機模擬技術基礎上的定量分析，其基本條件就是要有能正確描述事故過程中汽車狀態的數學模型，只有建立正確的數學模型，才能較準確地推定事故車輛的碰撞速度。所以建立正確地車輛碰撞模型和運動模型正是汽車事故再現的關鍵問題。本文首先在總結前人研究的基礎上，深入地研究汽車碰撞理論，分析了車對車碰撞作用瞬間狀態的計算模型及碰撞恢復系數與碰撞前、后速度的關系；其次，根據交通事故中最普遍的一維和二維碰撞的不同情況，採用恢復系數和滑動摩擦系數等概念，分別建立了碰撞后車輛動力學模型；第三，對汽車碰撞事故再現進行了初步研究，確定了車對車碰撞事故模擬計算和反推計算方法，並給出相應的模擬程序流程圖。
  5. To gain better innovation performance, enterprises should promote total synergy of these six key agents under the paradigm of tim ; 2 ) the five - phase process model of total synergy, named c ~ ( 3 ) is is brought forward in this paper, contact / communication, competition / conflict, cooperation, integration and synergy as general five phases in the process of enterprise ' s technology innovation ; 3 ) based on literature review and the result of empirical research from more than 100 large and middle chinese enterprises, some important factors are summaried, and approaches to promot the total synergy of all innovation agents are recommended ; 4 ) synergy betweentechnology and every non - technology agent innovation has strong positive corelation to the degree of total synergy, among which synergy between technology and market agent contributes most, following is between technology and institution agent, technology and organization agent, technology and strategy agent, and the synergy between technology and culture agent contributes least ; the quantitative relations ( regression equation ) between them are : degree of total synergy = synergy between technology and organization agent 0. 16 + synergy between technology and institution agent 0. 38 + synergy between technology and market agent 0. 46 - 2. 70

    首先結合國內外文獻和面向全國100餘家大中型工業企業的211份調查問卷的實證研究得出了創新要素全面協同的影響因素。在此基礎上，從戰略與領導、制度、組織結構與流程、文化、溝通與知識共享等方面總結出了促進各創新要素協同的方法與途徑； 4 .技術與各非技術創新要素的兩兩協同對于要素全面協同程度都有較強正相關性，其中對于全而協同程度貢獻最大的是技術與市場要素的協同，其次是技術與制度、技術與組織、技術與戰略，而技術與文化要素的協同對于全面協同的貢獻相對較少。實證得出各要素協同與全面協同程度間的定量關系是（線性回歸方程） :要素全面協同程度二技術與組織要素協同x0 . 16 +技術與制度要素x0 . 38 +技術與市場要素xo . 46一2 . 70 。
  6. The water quality respond relation of input - output measurements are established by systematic theory in this paper. according to the peculiarity of hydrology and the necessity of water quality inverse problem the multi - parameter inverse problem model based on ordinary differential equation is developed. the existence and uniqueness of the solution of the ordinary differential equation about two parameters or multi - parameter are to be proved. the unstability depending on errors between monitoring data and interpolation approximate data are analyzed and demonstrated. cubic spline interpolation function, the least two multiply and positive rule method are conjoined for obtained solution of multi - parameter. the results from this algorithm indicats its efficient to the multi - parameter identification in water quality modeling

    本文應用系統理論，建立了水質多參數輸入輸出之間的響應關系；根據河流水文水質變化特點和參數反問題的需求，建立了水質常微分方程多參數反問題模型.根據常微分方程參數反問題的數學理論，作者給出了兩參數和多參數水質常微分方程反問題的解的存在性、唯一性的理論證明過程和結論；還針對水質現有監測資料的測驗誤差和插值近似計算誤差造成參數反問題的不穩定性，將三次樣條插值函數、超定方程最小二乘法和正則化演算法有機地結合使用，成功地給出了水質參數反問題的穩定化演算法.最後給出了應用計算結果
  7. For large errors introduced by nonlinear state - space model in passive locating and tracking problems, various suboptimal recursive filtering algorithms are aralyzed and summarized, such as the extended kalman filtering ( ekf ), the modified gain extended kalman filtering ( mgekf ), the second order filtering and the adaptive extended kalman filtering ( aekf )

    摘要針對被動定位跟蹤中狀態空間模型非線性程度較高所引發的濾波精度偏低的問題，分析和總結了已有的包括推廣卡爾曼濾波（ ekf ） 、修正增益的推廣卡曼濾波（ mgekf ） 、二階濾波、自適應推廣卡爾受濾波（ aekf ）等各種次優遞推濾波演算法的特點。
  8. And the average illumination intensity can be figured out through statistic method. here, some kinds of traditional led ' s optical encapsulated structure were simulated using monte carlo method. and experiments were performed using the correspondent led ' s optical encapsulated structure with the same conditions just like what were used in simulation

    採用二次曲面系數矩陣a統一描述任意二次曲面，給定系數矩陣a1 ， a2 … ， an ， （ n為小於10的正整數） ，和描述曲面范圍的條件，就描述了一個完整的led光學結構模型供模擬。
  9. And use relative fitting error to measure statistical data non - uniform error ; then introduce the method systematically of using the fuzzy comprehensive evaluation method to carry on the overall superior test of the government statistical data quality. includes the establishment of step level appraisal target system, target weight determination, calculates the factor weight in various levels, uniform test of judgment matrix, and built up the final fuzzy comprehensive evaluation model of the government statistical data quality according to the above - mentioned standard ; finally selects the partial main social economy total quantity target from chinese statistics yearbook 2003 to carry on the real diagnosis analysis : ( 1 ) confirm these social economy total quantity targets using the description statistics and the k - s inspection method to obey the lognormal normal distribution. ( 2 ) according to the two levels of inspection methods which this article proposed to carry on accuracy and the overall superior test for these social economy total quantity targets

    本文首先從統計數據及質量的涵義出發，全面系統的介紹了統計數據質量的概念;其次，從研究統計數據的分佈規律入手，對統計數據準確性檢驗問題進行了探討，利用對數正態分佈檢驗對反映研究對象規模大小的統計數據的質量及異常數據進行定量檢查和識別，並利用相對擬合誤差計量統計數據的非一致性誤差;接著系統介紹了利用模糊綜合評價方法對政府統計數據質量進行整體優度檢驗的思路，具體包括建立遞階層次的評價指標體系，指標權重的確定，計算各層次中因素的權重，判斷矩陣的一致性檢驗，並根據上述標準建立了最終的政府統計數據質量模糊綜合評價模型;然後通過從2003年中國統計年鑒資料中選取部分主要的社會經濟總量指標進行實證分析: （ 1 ）利用描述統計和k - s檢驗法來驗證這些社會經濟總量指標服從對數正態分佈的規律; （ 2 ）按照本文提出的二級檢驗法來對這些社會經濟總量指標進行準確性和整體優度檢驗，從而達到綜合評價政府統計數據質量的目的;最後對這種二級檢驗法的優點和不足進行小結，提出今後應該努力改進的方向。
  10. First, use the theory to solve the practical problem directly. second, set up the model for finding the solution of the actual questions that have been polished ; third, analyze the situation of the firsthand questions, assess the main and secondary elements, and then set up the model for finding the solution

    2 .正確的層次定位初中階段的數學應用分為三個層次:一是直接利用現成的公式、定理解決實際問題;二是對已經加工提煉過的實際問題建立模型求解;三是對原始的實際問題情境進行加工分析，判斷出主要、次要因素后建立模型求解。
  11. The dual standard quantity ( the work piece and the discrete standard quantity ) mutual measuring and model verification methods are also proposed, which perfects the whole modifying process from data measuring, error separation, model establishment to real correction. after researching the discrete standard quantity system dynamic error separation technique, two error correction methods based on genetic algorithm and neural network mixed modeling technique are established. the two methods are the discrete standard quantity dynamic error direct / synchronous correction and prediction model correction ; the model ' s parameters and model ' s exercising method are also confirmed

    設計了雙標準量值（工件和離散標準量）互比測量的模型驗證方法，完善了從數據測量、誤差分離、模型建立到實際修正的整個修正過程；研究了離散標準量系統動態誤差分離技術，建立了基於遺傳進化演算法與神經網路混合建模技術的兩種誤差修正方法? ?離散標準量動態誤差直接（同步）修正方法和預報模型修正方法，並確定了模型結構參數和模型訓練方法；分析了預報模型的多次預報性質，並得出了多次預報與多步預報的等效關系，確定了測量系統的有效預報范圍以及模型參數對泛化誤差的影響；進行了模型的對比實驗驗證和被測工件動態誤差修正試驗，成功地實現了任意二面角和圓分度的實時誤差修正。
  12. The adaptive setting algorithm and realizing strategy of adaptive protection function use local information of adaptive protection device, information of substation, status messages and topology connection relations coming from scada system offered by centralized control center to adapt to changes of topology structure, system impedance and fault type by amending the settings on line. the adatpvie protection algorithm of the device is adaptive three - step current protection

    所提出的自適應整定演算法、系統級自適應保護功能實現策略綜合利用供配電線路自適應保護裝置本地信息、變電站站內信息與集控中心藉助scada系統提供的一次、二次設備狀態信息及拓撲連接關系，自動在線計算並修正保護整定值，實現了對電力系統拓撲結構、運行方式及故障類型變化的自適應。
  13. The analog pd and pid controller are studied. the application of lqr optimal control theory on the controller design is discussed, and pid with nonlinear regulator has been applied to control the system with high system stiffness and large stable regions

    研究了幾種模擬控制器，應用線性二次型最優控制理論設計了線性調節器，並研究了帶非線性引前校正環節的pid控制器，提出了大幅度提高系統剛度和穩定范圍的參數設計方法。
  14. ( 2 ) on the results of new quadratic pek method, the quadratic epek method is discussed. the convergence of the quadratic epek method is proved in hermite positive definite matrix. then the condition of hermite positive definite matrix is extended to the condition of the positive - definable matrix

    （ 2 ）在新型二次pe _ k方法的基礎上，討論了新型二次pe _ k方法的外插迭代二次epe _ k方法的收斂性，證明了當系數矩陣為對稱正定矩陣時二次epe _ k方法的收斂性，並將在正定矩陣條件下收斂的情形推廣到了可正定化矩陣的情形。
  15. Under different rev and loads, the optimal diesel / alcohol proportion would be different. in order to find out the change rule of optimal diesel / alcohol proportion, an orthogonal regression rotating experiment of three factors ( rev, diesel / alcohol proportion and load ) at five levels has been carried out. based on the experiment, four regression equations including energy consumption, soot emission, noise level, and power equations concerning the three factors have been established

    在性能試驗的基礎上，還進行了三因素五水平的二次正交回歸旋轉組合試驗，建立了能耗率、煙度、噪聲、功率與轉速、酒精摻燒率及負荷率之間的回歸模型，通過分析可知，這些模型具有較高的可信度；利用這些模型，本文最後對不同工況下的最佳酒精摻燒率進行優化分析，並利用正交多項式回歸，求出了最佳摻燒率與轉速、負荷之間的回歸模型，該模型在今後的深入研究中將起到一定的指導作用。
  16. In this paper, i analyze the practical condition of the cad applied to the transformer, make some researches on the primary technology of the expert system based on the forward chaining, on the modeling technology based on the assemble feature, on the design ideal based on the parametric drawing, on the principal of the database. i develop the practical cad software system about the transformer structural project based on the previous principal and ideal, applying to the vc + + system and the regeneration development tool of the autocad system. the system establishes the foundation for the integration of the transformer design information, reduce the time of the transformer design, increase the design efficiency and the economic effectivity of the enterprise, and have a great applicational value

    本論文分析了cad在變電設備行業中運用的實際情況，先後研究了基於正向推理的專家系統的基本技術，研究了裝配特徵的造型技術，研究了參數化繪圖的設計思想，研究了數據庫管理的基本思想；在vc + +環境下和autocad二次開發工具objectarx的基礎上，開發了基於上述技術和思想的變壓器結構方案cad應用軟體系統，為變壓器製造業的信息化和系統設計的集成奠定了基礎，在一定程度上能減少變壓器總體設計時間，提高企業的設計效率，能為企業帶來較大的經濟效益，具有較大的應用價值。
  17. The positive subdefinite and semipositive subdefinite solutions of matrix equation ax

    半正定二次型及半正定矩陣
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