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BiNing HuangDaren 《高校应用数学学报(英文版)》2001,16(4):397-401
In this note, a criterion for orthonormality of refinable functions via characteristicpolynomial of a matrix is given. 相似文献
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In this paper, a new method is presented for designing M-band biorthogonal symmetric wavelets. The design problem of biorthogonal linear-phase scaling filters and wavelet filters
as a quadratic programming problem with the linear constraints is formulated. The closed-form solution is given and a design
example is presented. 相似文献
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关于含有Stirling公式的双边不等式(英) 总被引:2,自引:1,他引:1
本文证明了有关n!的一个便于应用的双边不等式,它对一切自然数都成立,且当n变大时,上界不等式能给出误差界为O(n-3)的Stirling渐近公式,从一定意义上说,文中的上界不等式具有最优形式,因为其中的常数0.5已作了最佳选择.文末还给出了关于Catalan数的一个双边不等式. 相似文献
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含咪唑基配体的笼状双核铜超分子配合物的合成与晶体结构 总被引:2,自引:0,他引:2
利用Cu(ClO4)2.6H2O与柔性二齿配体m-bitmb[1,3-二(1-咪唑基-亚甲基)-2,4,6-三甲基苯]自组装合成了新化合物[Cu2(m-bitmb)4](ClO4)4.H2O,并用FAB-MS和X射线单晶衍射对其结构进行了表征。结果表明该化合物是一个笼状超分子,两个铜原子和四个柔性配体m-bitmb构成的阳离子笼内包合了一个高氯酸根,另外三个高氯酸根和一个水分子在笼外。阳离子笼通过苯环间的π-π弱作用连接成一维链状结构。此配合物属单斜晶系P21/n,a=1.3950(3)nm,b=2.0742(4)nm,c=1.3997(3)nm,β=96.19(3)°,V=4.026(14)nm^3,R1=0.0598,wR2=0.1491. 相似文献
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具有负顾客到达的M/G/1可修排队系统 总被引:3,自引:0,他引:3
本文考虑一个具有负顾客到达的M/G/1可修捧队系统.所有顾客(包括正顾客和负顾客)的到达都是泊松过程,服务器是可修的.Harrison和Pitel研究过具有负顾客到达的M/G/1捧队系统.这里我们推广到有可修服务器情形,系统的稳态解最后可以通过Fredholm积分方程解出. 相似文献
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Zong Xiju Zhao Yi Yin Zhaoyang Chi Tao 《高校应用数学学报(英文版)》2007,22(3):277-285
In this paper, the boundary control problem of a distributed parameter system described by the Schr(o)dinger equation posed on finite interval α≤ x ≤β:{iyt yxx |y|2y = 0,y(α,t) = h1(t),y(β,t) = h2(t) for t > 0 (S)is considered. It is shown that by choosing appropriate control inputs (hj), (j = 1,2) one can always guide the system (S) from a given initial state ψ∈ Hs(α,β),(s ∈ R) to a terminal state ψ∈ Hs(α,β), in the time period [0, T]. The exact boundary controllability is obtained by considering a related initial value control problem of Schr(o)dinger equation posed on the whole line R. The discovered smoothing properties of Schr(o)dinger equation have played important roles in our approach; this may be the first step to prove the results on boundary controllability of (semi-linear) nonlinear Schr(o)dinger equation. 相似文献
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在En考虑椭圆方程(?)其中A,B满足如下的结构条件:(?)本文证明如果广义整解u∈Wp,loc1(En)∩ Lα(En),其中(?)那么u≡0. 相似文献