The induction of megaspore developing from cultured unpollinated ovaries or ovules in vitro is one of the important ways to obtain haploid plants. Many researchers have achieved success in the field of a few crop plan...The induction of megaspore developing from cultured unpollinated ovaries or ovules in vitro is one of the important ways to obtain haploid plants. Many researchers have achieved success in the field of a few crop plants, such as barley, tobacco,wheat, etc. in recent years, but so far there has been no successful report on woody plants domestically and abroad. In 1964, Tulecke, W. cultivated unfertilized female gameto-展开更多
The determination of the power spectrum of the output of a nonlinear device in terms of its input is an old difficult problem. This problem was once studied by S. O. Rice et al. Previous results had been obtained most...The determination of the power spectrum of the output of a nonlinear device in terms of its input is an old difficult problem. This problem was once studied by S. O. Rice et al. Previous results had been obtained mostly on the hypothesis that the input is a Gaussian variable, therefore, their applications are restricted within certain limits. For example, P. A. Bello presented the relationahip between the output rms bandwidth and the input rms bandwidth of the nonlinear envelope detector on the hypothesis that the channel is Gaussian.展开更多
Baker studied the growth of the comPosite function f{f(z)} for a transcendentally entire function f(z) of zero order and showed by three examples that the order of f{f(z)} can be O, ∞ or 1. In the present letter, we ...Baker studied the growth of the comPosite function f{f(z)} for a transcendentally entire function f(z) of zero order and showed by three examples that the order of f{f(z)} can be O, ∞ or 1. In the present letter, we give two sufficient conditions under which the function f{f(z)} is of zero order (or infinite order). Besides, making use of some results of Baker’s, we construct a transcendentally entire function f(z)展开更多
In this letter the following results have been proved Theorem 1. If Φ is a homomorphism of a complete Boolean lattice (?) onto a lattice (?)’, then the following conditions are equivalent:
The English edition of Systems Science and Mathematical Sciences is distributed internationally.It seeksto publish theoretical and applied papers pertaining to systems science and mathematical sciences.It is forresear...The English edition of Systems Science and Mathematical Sciences is distributed internationally.It seeksto publish theoretical and applied papers pertaining to systems science and mathematical sciences.It is forresearchers,engineers and teaching people engaged in these areas.展开更多
Ⅰ. INTRODUCTION Suppose f(z)=z+sum from n=2 to α_nz^n to be analytic in the unit disk |z|<1 and f(z)f’(z)≠0 (0<|z|<1), we say f(z) is a (α,β)-type spiral-like function. If there and α ∈ (-∞, +∞) such
In finding roots of polynomials by Kahn’s algorithm, Prof. W. Harold Kuhn construeted the sequences (zjk, djk), where are all roots of a monic polynomial f（z） of degree n in the complex variable z with complex numb...In finding roots of polynomials by Kahn’s algorithm, Prof. W. Harold Kuhn construeted the sequences (zjk, djk), where are all roots of a monic polynomial f（z） of degree n in the complex variable z with complex numbers as coefficients, f（z）=zn+α1zn-1+…+αn-1z+αn.展开更多
文摘The induction of megaspore developing from cultured unpollinated ovaries or ovules in vitro is one of the important ways to obtain haploid plants. Many researchers have achieved success in the field of a few crop plants, such as barley, tobacco,wheat, etc. in recent years, but so far there has been no successful report on woody plants domestically and abroad. In 1964, Tulecke, W. cultivated unfertilized female gameto-
文摘The determination of the power spectrum of the output of a nonlinear device in terms of its input is an old difficult problem. This problem was once studied by S. O. Rice et al. Previous results had been obtained mostly on the hypothesis that the input is a Gaussian variable, therefore, their applications are restricted within certain limits. For example, P. A. Bello presented the relationahip between the output rms bandwidth and the input rms bandwidth of the nonlinear envelope detector on the hypothesis that the channel is Gaussian.
文摘Baker studied the growth of the comPosite function f{f(z)} for a transcendentally entire function f(z) of zero order and showed by three examples that the order of f{f(z)} can be O, ∞ or 1. In the present letter, we give two sufficient conditions under which the function f{f(z)} is of zero order (or infinite order). Besides, making use of some results of Baker’s, we construct a transcendentally entire function f(z)
文摘In this letter the following results have been proved Theorem 1. If Φ is a homomorphism of a complete Boolean lattice (?) onto a lattice (?)’, then the following conditions are equivalent:
文摘The English edition of Systems Science and Mathematical Sciences is distributed internationally.It seeksto publish theoretical and applied papers pertaining to systems science and mathematical sciences.It is forresearchers,engineers and teaching people engaged in these areas.
文摘Ⅰ. INTRODUCTION Suppose f(z)=z+sum from n=2 to α_nz^n to be analytic in the unit disk |z|<1 and f(z)f’(z)≠0 (0<|z|<1), we say f(z) is a (α,β)-type spiral-like function. If there and α ∈ (-∞, +∞) such
文摘In finding roots of polynomials by Kahn’s algorithm, Prof. W. Harold Kuhn construeted the sequences (zjk, djk), where are all roots of a monic polynomial f（z） of degree n in the complex variable z with complex numbers as coefficients, f（z）=zn+α1zn-1+…+αn-1z+αn.
