necessary condition 中文意思是什麼
necessary condition
解釋
必然條件-
Since the discovery of cnt ’ s and find that cnts have small diameter and high length diameter ratio and can be look as one - demission material, it can be used as emission emitter of fed. especially, the aligned cnts array can be seen innumerable single cathodes which are lined regularly and form array. so growing aligned cnts array in selective area is the key technology to product cnts fed, which is also the necessary condition of cnts micro - electronics device
自碳納米管發現以來，由於碳納米管的直徑很小、長徑比大，故可視為準一維納米材料，可作為場發射平板顯示的尖端發射體，特別是定向碳納米管陣列可看成是無數根單尖陰極規則的排列起來形成陣列式，是理想的場發射平板顯示器的尖端發射體。 -
Section 3 and section 4 are the main parts of the paper. by employing the directional derivative and generalized gradient in the broad sense, as defined in this paper, the first order necessary condition and the first order sufficient condition of the single - objective non - smooth programming where the objective function is d - regular weak lipschitz function and constrained functions are regular weak lipschitz functions
第三節和第四節是本文的主要章節，以本文定義的廣義方向導數和廣義梯度為分析工具，對目標函數為d正則弱l函數，約束函數為正則弱l函數的單目標非光滑規劃分別給出了一階必要條件和一階充分條件。 -
Tragedy contains them both, goes beyond both, illuminates both, but comes to no conclusion. tragedy could, it is true, be called pessimistic in its view of the evil in the universe as unremitting and irremediable, but the blight man was born for, the necessary condition of existence. it is pessimistic, also, in its view of the overwhelming proportion of evil to good and in its awareness of the mystery of why this should be - the " unfathomable element " in which ahab foundered. but it is optimistic in what might be called its vitalism, which is in some sense mystical, not earthbound ; in its faith in a cosmic good ; in its vision, however fleeting, of a world in which all questions could be answered
悲劇包含了樂觀與悲觀，超越了兩者，反映了兩者，但是並不最終指向任何一方.的確，悲劇可以被認為是悲觀的，其原因在於它始終視世間的邪惡為永不止息和無法救贖的.然而那些悲劇人物卻是人類存在之必然疾患的證明.它是悲觀的，同時也在於它意識到在這世上惡相對于善是多麼強勢的存在，並且這一事實的不合理性也一直糾結在它心裏.這一深不可測的迷惘導致了以色列國王亞哈的沉淪.然而，悲劇又是樂觀的，因為其強大的生命力.這種在某種程度上神秘的，超乎世俗的生命力.它的樂觀性在於其對宇宙本質之良善的信心，在於其即使短暫，卻實在的，認為世間萬種疑惑終將被解答的信念 -
Joiner postulates that a necessary condition for suicide is habituation to the fear about the pain involved in the act
喬伊納假定自殺的必要條件是：能夠處之泰然地面對自殺行動中引起疼痛的恐懼。 -
The importance of collision course in guidance of homing missiles is elaborated, that is, the sufficient and necessary condition for a successful interception is the missile and target in the collision course
闡述了碰撞過程在尋的制導中的重要意義，即實現攔截的充分必要條件是導彈與目標處于碰撞過程上。 -
Mathematics is an organism for whose vital strength the indissoluble union of the parts is a necessary condition.
數學是一個有機體，它的生命力的一個必要條件是所有各部分的不可分離的結合。 -
Chapter 2 on the locally ( weakly ) uniform rotundity of musielak - orlicz sequence spaces : rotundity is important property in the geometry of banach space. in this paper, criterion that musielak - orlicz sequence spaces equipped with the orlicz norm and luxemburg norm is locally ( weakly ) uniformly rotund was discussed in detail. moreover, we get the sufficient and necessary condition of them
第二章musielak - orlicz序列空間的局部（弱）一致凸：凸性是banach空間幾何理論的重要性質，本文詳細討論了賦orlicz范數和luxemburg范數的musielak - orlicz序列空間及它們的子空間的局部（弱）一致凸，並給出了它們的充分必要條件 -
This thesis is divided into two parts. in the first chapter, the existence of markov chains in random environments is described, and their properties are studied. the concepts of recurrence, transience, - irriducibility and strongly - irriducibility are introduced. the sufficient and necessary condition for recurrence of strongly - irriducible markov chains in random environments is obtained, then some sufficient conditions for recurrence and transiece of markov chains in random environments are given. in the second chapter, some results on the existence of invariant measure of bichains ( xn, tn ) are outlined
全文共分兩章，在第一章中，簡述了隨機環境中馬氏鏈的存在性及其一些性質，介紹了常返性，瞬時性， -不可約，強-不可約等概念，並且得到了具有強-不可約性鏈常返性判定的充分必要條件，以及在一般情形下鏈（ -
A sufficient and necessary condition for determining singularity of a block circulant matrix over a quaternion division algebra over a field is given, and two algorithms for the inverse of a nonsingular block circulant matrix over the quaternion division algebra are presented
?給出了域上的塊循環矩陣可逆性的充要條件及其逆矩陣的演算法。 ?給出了四元素可除代數上的塊循環矩陣可逆性的充要條件及其逆矩陣的兩種演算法。 -
During studying, take the character and necessary condition of logistics management a masterstroke and base on a traditional transport enterprise, mainly study resource conformity and analyze other problems in a systematical way. the result can extrude e important problem, while caring all
本文以現代物流特點和發展現代物流所需要的條件為主線，以傳統運輸企業為背景，抓住發展現代物流的重點即資源整合問題進行重點研究，同時又採用系統論的觀點對其他問題進行系統分析，使研究的對策結果重點突出而具有全面性。 -
A sufficient and necessary condition for metrization of a de morgan algebra of uniformity
德摩根一致代數可度量化的一個充要條件 -
With the development of the network and the multi - processor system, the research, simulation and the impemeni of the system - level fault diagnosis which is the very important means to increase the reliability of the system, are becoming more and more important. on the system - leve1 fault diagnosis, based on the group theory of system - level fault diagnosis that has been put forward by pro f zhang, the paper constructs newly the theory bases, improves on the matrix method, reinforces and consummates group arithmetic of all kinds of test mode, for the first time, analyses and discusses the equation solution of all kinds of models, so al1 the consistent fault patterns ( cfp ) could be found, straightly and high efficiently, even if the sufficient and necessary condition of t - diagnosable is dissatisfied and the complexity of system - level fault diagnosis is greatly decreased, especialy in strong t - diagnosabl6 system. last the simulation system ' s function has been extended and the application hotspot and the development trend have been disscussed
本人在張大方教授等人提出的基於集團的系統級故障診斷的理論基礎上，重新構建了系統級故障診斷的理論基礎，定義了系統級故障診斷測試模型的三值表示；改進了系統級故障診斷的矩陣方法，重新定義了測試矩陣、鄰接矩陣、結點對、結點對的相連運算、極大準集團和斜加矩陣，由此能直觀、簡便地生成集團和極大獨立點集；補充和完善了各類測試模型的系統級故障診斷的集團演算法，通過定義集團測試邊和絕對故障集，簡化了集團診斷圖，由此能較易地找到所有的相容故障模式，即使不滿足t -可診斷性，大大減少了系統級故障診斷的復雜度，尤其是對強t -可診斷系統；首次分析探討了各類測試模型的方程解決，由此從另一角度能系統地、高效率地求出所有的相容故障模式（ cfp ） ：擴充了系統級故障診斷模擬系統的功能，快速、直觀和隨機地模擬實驗運行環境，進行清晰和正確的診斷，同時提供大量的實驗數據用於理論研究，優化演算法和設計。 -
Two conceptions of quasiseparable state and distillable subspace are introduced. first a necessary condition of distillability from finite copies is given, then a necessary and sufficient condition of distillability from finite copies and the most efficient distillation protocol are given. these conclusions can be generalized to multi - partite mixed states
定義了準分離態和提取子空間的概念，得到了在有限個拷貝情況下，二體和多體混合態糾纏提取的必要條件、充要條件及最有效的提取方案；計算了2 （ -
In terms of information an new interpretation for the distillation of entanglement and the distinguishability of orthogonal states is given. using a special protocol we give a sufficient and necessary condition for the local distinguishability of states, and gain the maximal yield of the distillable entanglement
這個關系式揭示了系統的不確定性與系統的非局域性之間的關系（我們相信系統的不確定性與系統的非局域性之間的關系研究將成為量子信息的一個有意義的方向） 。 -
All the three superiorities i mentioned above help to provide an exceptional advantage for developing hi - tech enterprises in haidian, and further contributes to securing haidian the leading position in the country s hi - tech development, thus qualifying herself with the necessary condition for developing her knowledge economy
以上三種優勢，為海淀區發展高新技術產業提供了得天獨厚的條件，確立了海淀區在全國高科技發展中的核心地位，具備了發展知識經濟的條件，它必將成為我國知識經濟的先導。 -
We thought that the flown line ' s distortion to the same direction is one of necessary condition to spiral flow. the mechanism of spiral flow we deduced can explain many phenomena, we prepare to declare patent of the set of spiral flow generator which invented in the paper. our conclusion is based on experiment, it can offer foundation to advanced research
本研究的結論是在實驗的基礎上得來，具有一定的推理性質，它為今後進一步的深入研究提供武漢理工大學碩士學位論文實驗的基礎上得來，具有一定的推理性質，它為今後進一步的深入研究提供了一個基礎，也有待於今后進一步的驗證。 -
With the generalized algebraic riccati inequality ( gari ) approach, a sufficient and necessary condition for the existence of dynamic output feedback h controllers is presented, such that the resulting closed - loop sy stem is admissible with its transfer function satisfying h norm constraint
利用廣義代數riccati不等式，給出離散廣義系統存在正常動態輸出反饋h控制器，使得閉環系統是容許的且其從外界干擾輸入到受控輸出的傳遞函數矩陣具有h范數約束的充分必要條件。 -
For a general linear model ( input matrix is deterministic ), under a certain conditions on variance matrix invertibility, the two estimates can be identical provided that they have the same priori information on the parameter under estimation. even if the above information is unknown only for the optimally weighted ls estimate, the sufficient condition and necessary condition, under which the two estimates are identical, is derived. more significantly, we know how to design input of the linear system to make the performance of the optimally weighted ls estimation identical to that of the linear minimum variance estimation in case of being lack of prior information
在一般線性模型（即輸入矩陣為確定性）下，當兩種估計都利用有關被估參數的先驗信息時，二者在方差陣可逆的一定條件下可達到一致；當最優加權最小二乘估計不利用此先驗信息時，存在二者一致的充分條件和必要條件，進而找到一種設計輸入矩陣的方法，使得在先驗信息缺乏的條件下，仍可利用最優加權最小二乘估計達到與線性最小方差估計一樣優越的估計性能。 -
In order to utilize the frquency resource adequately and increase the capacity of mobile communication system, the wireless electric wave propagation of existing mobile system always adopts the microcell structure. forecasting the path loss characteristic of electric wave accurately can provide the necessary condition for the layout and design of wireless network, at the same time it is a precondition for the research on the microcell mobile system. the methods of forecasting of wireless electric wave propagation can divide into two parts : one is pluse and respond, that is establish the empirical model based on experimental and statistical data ; the other is ray tracing method, that is establish the deterministic model based on theoretical analyse. the paper discuss the characteristic of wireless signal electric wave transmition in symmetrical atmosphere of earth, and introduce the common path loss transmition model in land mobile communication system, also point out the localization of these models based on experiential methods
而精確預測無線電波傳播路徑損耗特性，則為合理的微蜂窩無線網路規劃、設計提供了必要條件，同時也是研究微蜂窩移動通信系統性能的前提。無線電波傳播預測的方法分為兩類：一是用沖激響應法，即根據實驗、統計所得數據建立經驗性傳播預測模型；另一種是用射線跟蹤方法，即依據理論分析來建立確定性的傳播預測模型。本文首先討論了在地球表面均勻大氣中的無線電波傳播的基本特性，介紹了陸地移動通信系統中常用的幾種電波傳播路徑損耗經驗性預測模型，並指出了這些經驗性傳播模型對于微蜂窩小區無線電波傳播特性研究的局限性。 -
Once landau theory of phase transition was used to deal with ferroelectrics phase transition. it introduces symmetry breaking into phase transition theory and associates it with order parameter to find the necessary condition of occurrence of phase transition. the theory has settled plenty of problems
對于鐵電體，以前採用landau理論處理連續相變，這一理論引入對稱破缺，並將它與序參量的變化聯系起來，找到發生連續相變的必要條件，這成功地解決了一些問題。
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