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not sufficient condition
相关语句
  非充分条件
     Finally, the paper reaches the conclusion that, important as it is, high salary is only a prerequisite but not sufficient condition.
     文章的结论是 :高薪固然重要 ,但只是养廉的必要条件而非充分条件 ;
短句来源
  “not sufficient condition”译为未确定词的双语例句
     3. Concrete carbonization is not sufficient condition of steel corrosion.
     3.混凝土的碳化不是钢筋锈蚀的充分条件。
短句来源
     Binarity is not Sufficient Condition to Produce Barium Star
     双星不是形成钡星的充分条件
短句来源
     While they are NOT Sufficient Condition and NOT Necessary Condition for the success of Software Reuse, they are meaningful to show and emphasis the problems of Variation Point in Software Reuse.
     这个数学工具的引入,对于软件的成功复用既非充分条件也非必要条件,但是对于变化点这个问题来说具有说明和“强调”的意义。
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     A fine population status is a necessary but not sufficient condition for regional sustainable development.
     因而适度人口条件是区域可持续发展的必要前提和基础条件。
短句来源
     Human Capital is only necessary condition of growth but not sufficient condition, and the degree of human capital influencing growth is related with systematic factors.
     人力资本对经济增长的贡献大小,与影响人力资本作用的制度因素具有密切的关系。
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  相似匹配句对
     Calcium was not sufficient.
     钙摄入量不足。
短句来源
     . not. .
     和“Ithink...not...”
短句来源
     , not Y.
     Fu,不是紫玉兰 Y.
短句来源
     however,HPV infection is not sufficient.
     人乳头瘤病毒(HPV)感染是宫颈癌主要危险因素,但HPV感染并不能单独致瘤。
短句来源
     It is only the necessary condition, but is not the sufficient condition.
     但溶液达到饱和只是钙华沉积的必要条件而非充分条件。
短句来源
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  not sufficient condition
On a necessary but not sufficient condition for a γ-generating pair to be a nehari pair
      
This difference is again related to the water volume flowing from the South into the Northern Adriatic Sea and is a necessary (though not sufficient) condition for the occurrence of strong algal-blooms in summer.
      
The presence of SiO in the gaseous phase is a necessary but not sufficient condition for the formation of nanowires.
      
Based upon the results reported herein, the reduction of the oxide ion content of sodium sulfate is a necessary but not sufficient condition for sulfidation inhibition.
      
Results show that planting flexibility is a necessary but not sufficient condition for implementing more sustainable production systems.
      
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The asperity of sliding zone in rock is an important factor which the nonuniformity of sliding resistance and the mode of instability depend A traditional criterion accepted extensively up to now for judging whether a sudden instability will occur is to compare the stiffness of testing machine with the contact stiffness of sliding zone.However,the experimental investigations on rocks by using triaxial compression apparatus show that the high-pressure and low-pressure sudden instabilities are different from each...

The asperity of sliding zone in rock is an important factor which the nonuniformity of sliding resistance and the mode of instability depend A traditional criterion accepted extensively up to now for judging whether a sudden instability will occur is to compare the stiffness of testing machine with the contact stiffness of sliding zone.However,the experimental investigations on rocks by using triaxial compression apparatus show that the high-pressure and low-pressure sudden instabilities are different from each other in mechanism and criterion.The former takes place along a sliding zone with uniform-resistance and is caused mainly by the difference between potential energies at peak strength and residual strength;the latter along that with nonuniformsresistance and is caused by the difference between static and kinetic frictions.According to the solutions of the equations of motion corresponding to two kinds of sudden instabilities respectively,their criteria were obtained as follows:for high-pressure sudden instability,andfor low-pressure sudden instability,where K1 and K3 is the stiffness of axial and confining pressure system respectively,KEE' is the contact stiffness of sliding zone,i.e.the slope of descending segment of stress-strain curve,θ is the angle between the directions of the specimen axis and the normal line of sliding zone,and is the nonuniform resistance coefficient with a positive value less than 1.0.It is emphasised in the paper that the strength condition is only a necessary but not sufficient condition for strong earthquake and there are a series of necessary conditions such as those of environmental stiffness,nonuniform-resistance,etc.,apart from strength condition.

岩石具有两种不同机制的突发失稳型式,即低压和高压突发失稳。二者的基本区别在于错动过程的“非匀阻”和“匀阻”。错动面的凹凸不平是造成非匀阻和影响失稳型式的重要因素之一。根据不同的机制和运动方程,建立了各种失稳型式的相应判据,其中反映了环境刚度、接触刚度及非匀阻系数的影响。浅源强震主要是一种高压突发失稳的过程。本文强调,除强度条件外,强震的发生还必须具备环境刚度条件、匀阻条件以及其它的必要条件。

Much research has been done on aircraft direct force control, but no paper in the open literature has presented a satisfactory theoretical method for achieving such control thoroughly. This is due to the fact that relevant published paperes have not used decoupling control theory. The author in this paper attempts to present a theoretical method that can achieve aircraft direct force control thoroughly. Starting from existing linear decoupling control theory, the author studies the problem of dynamic pre-compensation...

Much research has been done on aircraft direct force control, but no paper in the open literature has presented a satisfactory theoretical method for achieving such control thoroughly. This is due to the fact that relevant published paperes have not used decoupling control theory. The author in this paper attempts to present a theoretical method that can achieve aircraft direct force control thoroughly. Starting from existing linear decoupling control theory, the author studies the problem of dynamic pre-compensation theory and points out that controllable output is the necessary but not sufficient condition for decoupling. Then the author obtains two types of dccoupling modes: (γ,0)-(δe, δf)and (α,0)-(δe, δf ). Eq. (6) in the full paper is the control law corresponding to the two types of decoupling modes just mentioned.As an example, the author takes the direct lift control surface of aircraft and makes use of the author's own software to obtain the control laws for all three basic modes of direct lift control, using Eq. (6). Computation results indicate that the decoupled systems arc stable and that dynamic responses arc satisfactory.

本文讨论了线性系统解耦理论用于实现直接升力控制三种基本模式的飞机解耦控制问题,并以装有直接升力操纵面的小型飞机为例,用通用线性系统解耦控制律计算软件设计了直接升力控制律.计算结果表明,用该理论所设计出的飞机直接升力控制系统可严格地实现直接升力控制的三种基本模式,同时闭环解耦系统是稳定的,且具有良好的动态响应

cis-[Dicarbonyl-(N-2-(2-pyridyl) ethyl-p-substituted aniline)rhodium] tetraphenylborates have been investigated as a model active rhodium cationic species for the carbonylation of methanol. The catalytic reaction took place smoothly to yield acetic acid and methyl acetate without other byproducts.The electronic effect of the para-substituents appears to show very little, if any,difference in the catalytic activity of the rhodium complexes.cis-Dicarbonylrhodium cations coordinated with two pyridyl radicals connected...

cis-[Dicarbonyl-(N-2-(2-pyridyl) ethyl-p-substituted aniline)rhodium] tetraphenylborates have been investigated as a model active rhodium cationic species for the carbonylation of methanol. The catalytic reaction took place smoothly to yield acetic acid and methyl acetate without other byproducts.The electronic effect of the para-substituents appears to show very little, if any,difference in the catalytic activity of the rhodium complexes.cis-Dicarbonylrhodium cations coordinated with two pyridyl radicals connected at different positions with mono-,di-and trimethylene chain have also been studied as the active species for the same reaction. The lengths of the carbon chain do exert some but definite infiuence on the activity even though these complexes are less active than those mentioned above, Coordination with α,α'-bipyridyl resulted in a deteriorated effect on the catalytic activity. It is deduced that the presence of Rh -Co bond in the catalyst is a necessary but not sufficient condition for an active species. The Ndonors with a steric arrangement facilitating a fluxional structure might also be a determining condition for the active species.The carbonylation reaction might proceed via a reversible 1,2-migration of the methyl group between the coordinated acetyl group and a cis-coordination site on the rhodium atom as the intermediate stage between the oxidative addition of methyl iodide and reductive elimination of acetyl iodide.

[顺-二羰基(N-2-(2-吡啶)乙基对取代苯胺)铑]的四苯硼酸盐作为催化剂,用于催化甲醇羰基化反应,在温和的条件下,可顺利催化甲醇羰基化反应得到乙酸和乙酸甲酯而无其它副产物.若以甲醇和乙酸的混合液作反应物,则得到乙酸酐和乙酸甲酯.即使在大量水存在下,也仅有微量的水煤气转换反应发生.实验证明对位取代基团的电子效应对铑配合物的催化活性影响甚微.在不同位置以不同链长相联的二吡啶配体对铑阳离子配合物性能的影响是明显的.其中α,α'-联吡啶铑阳离子结构不利于催化反应的进行.由此证明,作为催化剂活性物种除必须的Rh-CO键存在外,配体的空间结构是影响配合物活性的决定因素.羰基化发生在碘甲烷的氧化加成与乙酰碘的还原消除之间,同时还伴有一个在配位的乙酰基与铑的顺-空配位之间甲基的1,2移动变化.

 
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