1) envelope theorem
包络定理
1.
The envelope theorem of F-heredity law and separation theorem of F-transfer law are presented.
提出了F-遗传规律包络定理,F-传递规律分离定理。
2) constant envelope
恒定包络
1.
Theoretical analysis proves that CPQPSK signal has constant envelope.
理论分析证明CPQPSK信号具有恒定包络。
2.
Compared with other modulation techniques, the Constant Envelope and Quasi-constant Envelope Modulation&Demodulation technologies are insensitive to the non-linear characteristic of the power amplifier because of the constant envelope.
恒定及准恒定包络调制技术与其它调制技术相比,由于包络恒定,对功放的非线性特性不敏感。
3) envelope theory
包络理论
1.
This paper discusses singularities,inflection points and convexity of FB-spline curves in terms of their control polygons,and gives the necessary and sufficient conditions for testing when FB-spline curves have one or two inflection points,or a cusp,or a loop,or none of the above points by the envelope theory and the topological mapping method.
文章利用包络理论和拓扑映射的方法,讨论了FB-样条曲线的奇拐点和曲线性质,并给出了依据控制多边形判断FB-样条曲线出现1个或2个拐点、1个尖点、1个二重点以及处处为凸的充分必要条件;最后给出了FB-样条曲线的奇点、拐点以及二重点在λ-μ平面上的分布图。
2.
The envelope theory was used to establish the general tooth surface equation of end faced worm wheel pair,and the synthetic curvature of tooth surface has been analyzed and computed.
对一种新型的蜗杆传动———端面蜗轮副分析和建立了数学模型,运用包络理论,建立了端面蜗轮副的通用齿面方程,分析计算了齿面的综合曲率。
4) envelope principle
包络原理
1.
Directed toward it’s defects,we put forward a plan which is based on envelope principle to variate gear form ,obtain dedendum transition curve of greater trochanter which is based on envelope p.
针对其缺点,提出了利用包络原理得到的齿形的方案,得到了基于包络原理的大转子齿根过渡曲线,以改善泵的性能。
5) Quasi-constant Envelope
准恒定包络
1.
Compared with other modulation techniques, the Constant Envelope and Quasi-constant Envelope Modulation&Demodulation technologies are insensitive to the non-linear characteristic of the power amplifier because of the constant envelope.
恒定及准恒定包络调制技术与其它调制技术相比,由于包络恒定,对功放的非线性特性不敏感。
6) inclusion theorem
包含定理
1.
In this paper an inclusion theorem of the equation s eigenvalues is obtained by using a concept about same sign of the functions.
利用同号函数这一概念 ,导出了积分方程特征值的一个包含定理。
补充资料:包络
包络
envelope
而充分条件是f任C,,并且满足(9)和下列条件: D ff.f.几、_Df云.几、 二二上二坦述二乙竺乙笋O,共月典二书笋砖0. D(x,y,z)一’D(A,B)对于曲面族r(u,。,A,B),其中r任C,和rux瓦护0,必要条件是 甲=(ru孔rA)=0,少=(气凡rB)=0,(10)而充分条件是r任口,并且满足(l0)和 }〕三三,三},。,、,。. !叭凡巧几心礼峪l n维流形中依赖于k个参数的一族m维子流形包络的更复杂概念可在可微映射奇异性理论的基础上引出,作为一族映射的奇异性的特殊形式.给出的平面曲线族,其中C是族的参数,“是沿族中曲线的参数,一点在包络上的必要条件是几11rc,或 ,一孚毕共~一。,(3) D(u,C)两者是同一回事. 充分条件是r‘CZ并且除满足(3)外还要满足 几共一rc叭笋0.(4)违反条件(2)和(4)往往与包络上出现尖点有关. 空间依赖于单参数C的曲面族的包络(山volopeofa fami】y ofsur阮璐)是这样的曲面,使得其上每个内蕴参数为(u,v)的点与族中参数为C(“,v)的曲面相接触,并且函数C(u,v)在(u,。)定义域的任何区域上不是常数.例如,中心在一直线上的同半径球面族的包络是一个柱面.对于由f(x,y,z,C)=0给出的曲面族,其中f“c’和沃廿诱l+匡}护0,包络的必要条件是满足方程组 了=0,fc=0;(5)而充分条件是fe口并且除(5)外再加上条件: fc。笋0,(6) }卫丝二玉立{+}卫艾2五立}+}卫丛选立},。. }L, Lx,y)}}L,沙,z)1】L,Lz,x)!对于曲面族r(u,v,C),其中r‘C’和‘x凡笋0,包络的必要条件是满足方程 职=(凡几几)=0;(7)而充分条件是r任CZ并且除(7)外还要满足下列条件: }叭叭毋。l }r二ru凡rurc}特o,}礼j+I叭i笋0.(8) l孔叽嵘几rc!违反条件(6)和(8)中的第一式往往与包络上出现尖棱有关.包络与族中每张曲面的接触线称为特征线(cl坦份以eristiC clu货).包络上的尖棱通常就是特征线的包络. 空间依赖于双参数A和B的一族曲面的包络是这样的曲面,使得其上每点(u,v)与族中参数为A(u,v)和B(u,岭的曲面相接触,并且在(u,v)定义域的任何区域上不存在函数。‘c’使A(“,好二。(B(。
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