matrix of needs 中文意思是什麼
matrix of needs
解釋
需求信息總庫-
The questions the researcher concerned are which system will be chosen and how to obtain the good lithium ionic conductor materials, which is the basic departure of the paper. the addition of second phase in composite can change the interface structure and the conduction mechanism, improve the matrix conductivity and other function such as the sintering, crisping and so on, so the research of composites are an interesting field of the ionic conductors. the synthesis of lithium ionic conductor is often by solid state reaction, but this method needs high temperature and leads to the volatility of lithium which not only causes the drift of the compounds but gets the no well - distributed materials
研究者所關注的問題是選擇新的體系進行研究，以期得到性能更好的鋰離子導體材料，這也正是本論文的基本出發點；復合離子導體中第二相的加入改善了基質的界面結構和導電機制，不僅可以提高基質材料的電導率，還可以在一定程度上改善材料的其它性能，如燒結性能、脆性和機械強度等。因此復合材料的研究是離子導體一個有廣闊前景的發展方向；合成鋰離子導體，特別是成分復雜的體系以傳統的固相合成法為主，但這種方法需要較高的溫度，容易引起鋰的揮發，從而造成產物組成的偏移，而且不易得到顯微結構均勻的材料。 -
Current way to access control on web server mostly based on indiviual user, or the simple matrix management, which ca n ' t meet the management needs of large system
在web服務器的訪問控制中，目前多是基於對單個用戶的管理，或簡單的矩陣式管理，無法適應企業級或大系統的管理需求。 -
The paper introduces the optimal design of the second grade level net in fuoshan, expounds the evaluating method on accuracy for different net pattern based on the principle of indirect balancing and the computing function of the excel matrix, and selects a pattern which meets the needs of national norm for net form, the density of point, accuracy and reliability
摘要本文介紹了佛山市二等水準網項目的優化設計，重點闡述了根據間接平差原理對不同的布網方案，利用excel的矩陣計算功能實現精度評估的方法，評選出一套從網形、點位密度、精度、可靠性等方面都符合國家規范和佛山特點的方案，以供參考。 -
Moreover, in the application of aircraft structures design, the composite wing is still to meet the needs of aeroelastic design. through reading the aerodynamic influence coefficient matrix from the nastran file, this paper generates a static aeroelastic equilibrium equation and divergence eigen - equation, which is needed by the aeroelastic tailoring of composite wing. through this equation, the aeroelastic tailoring of composite wing and its optimization design have come into being
此外在飛機結構設計過程中，復合材料翼面結構還要滿足氣動彈性設計的需要，本文通過讀入由nastran所產生的氣動影響系數矩陣，構造出滿足復合材料氣動彈性分析所需要的靜氣動彈性平衡方程和發散特徵方程，並在此基礎上實現了復合材料氣動彈性剪裁優化設計。 -
However, in order to meet the needs of the operators and the market, some manufacturers developed high - capacity switching matrix equipment, whose access interface uses the stm - 1 rate, taking into account broadband integrated access service
然而計算機技術的發展，使得大容量交換機成為現實。一些廠家開發出大容量的交換矩陣設備，在考慮到寬帶的綜合接入業務，矩陣的接入口採用了stm - 1速率，只是為了適應運營公司和市場的需要。 -
Third, the paper presents a detailed system of excavating the latent needs and a super - matrix system to help companies to develop new products by using the latent needs
最後，本文提出了挖掘隱性需要的方法體系和利用隱性需要進行新產品開發的超矩陣模型。 -
In order to improve the properties of materials, one needs to understand the structural relationship between interface and matrix of the materials, such as interface atomic structure, misfit dislocation, chemical bond structure, stress field distribution, composition segregation etc. there are tremendous research works on the grain boundary and interface structures during last century and the sophisticated theory about grain boundary and interface, i. e. coincidence site lattice and 0 - lattice theories had been developed simultaneously
眾所周知，材料的宏觀性質是由其微觀結構所決定的，因此，為了改善材料的宏觀性能我們有必要弄清楚材料的界面與基體之間的結構關系，如界面的原子結構、失配位錯、化學鍵合、應力場的分佈等等。在上世紀，人們已對晶界和相界面結構進行了大量的研究，同時，相關的理論如「重位點陣」和「 o -點陣」理論也發展成熟。 -
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。 -
The main work and achievements are summarized as follows : based on herrmann variational principle and the nearly - incompressible viscoelastic constitutive relation, a new type of viscoelastic incremental finite element method is presented. in this method, incremental arithmetic is applied to solving the hereditary integrals. it needs less memory space, has simple parameter matrix, and calculates stiffness matrix only once
主要研究內容如下：從herrmann變分原理出發，基於適用於近似不可壓縮材料的粘彈性本構關系，利用增量法處理遺傳積分，發展了一種粘彈性增量有限元方法，所需存儲空間較少，參數矩陣形式簡單，求解過程只需要形成一次剛度矩陣，適用於藥柱的結構計算，奠定了確定性分析基礎。 -
The authors use the specific acoustic impedance of mpp which needs to be measured beforehand in the approach, and then, the transfer matrix method is employed to predict the sound - absorbing performance of single or multi - layered mpp
採用該方法獲得的微孔板吸聲性能曲線與實測結果相當接近，能較好地預測各種組合微孔板的吸聲性能。 -
In order to meet the needs of real time computation of electric power system state estimation, the estimation algorithm based on decomposing the measurement of voltage scope and power scope and the estimation algorithm based on the measurement transformation of the equivalent current are brought forward and deduced in this thesis. these two algorithms all can make the jacobian matrix a constant matrix and they are stimulated
為了滿足電力系統狀態估計實時性的要求，本文首先提出並推導了可以使雅可比矩陣為常數陣的基於分解電壓測量量和功率測量量的估計演算法和基於等效電流測量變換的估計演算法，並對此進行了模擬。 -
However, the performance of these algorithms that are based on linear approximation degrades considerably in highly nonlinear situation. whereas the ekf requires the evaluation of the jacobian to obtain the observation matrix, the cmkf needs it to compute the measurement error covariance. both of them employ linear approximation, and thus linear error is inevitible
論文第四章分析了ekf和cmkf在某些情況下跟蹤性能不理想的原因： ekf需要對量測方程進行線性近似， cmkf在計算轉換測量值誤差的均值和方差時同樣要進行線性近似，因此無法避免線性化誤差。 -
Aiming at the problem that solution fem equation set needs too much memory, segregated solotion method has been adopted and for the first in china e l em ent - b y - e lement ( e b e ) has been introduc ed when solving flow field parameter equation sets. ebe technology need not assemble and store the global stiffness matrix, and minish effectively memory requires of solution equation set, moreover it has inherent high parallelity, and advance equation solution
針對求解流場有限元方程組佔用計算機內存資源過多、限制求解規模的缺點，採用分離式求解法，在求解流場各參數方程時，在國內首次引入ebe技術， ebe技術不必組集和存儲總剛矩陣，能有效地減小了方程組求解時對內存空間的要求，同時ebe技術具有內在的高度并行性，能有效提高方程組的求解速度。
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