<正> According to S. Smale, an algorithm is said to be tractable if its cost of finding a zero of a complex polynomial does not grow exponentially with the degr
<正> Fig. 1 in this paper is a sketch of the event in which the relative positions of the three tracks are given by a, b and c. The characteristics of particle
<正> Let {x_n} be a Markov chain with positive reeurrent countable state space Ⅰ and stationary transition. Let f(u) be a nonnegative real valued functional on
<正> A binary sequence is a sequence of the form a=(a1, a2, ..., an, ...). This sequence is called a (±1) sequence if ai=±1 or -1, and it is also called (0
<正> Ⅰ. INTRODUCTION The region in which ferroelectries exist with the perovskite type structure is presented in Ref. [1] of this paper in a 2-dimensional para
<正> A fluoro-alkyl-bonded phase as HPLC packing has been prepared from silica (5μ) with 1, 2,-tetra-hydro 7-trifluoro methyl-fluoro-octyltrichlorosilane, (CF3)2CF
<正> The cloud seeding of metal complexes of β-diketones has been known for many years. However the ice nucleation of the title compounds of Fe (Ⅲ), Co (Ⅲ),
<正> S. B. Idso et al. of US presented the model of crop yield estimate of SDD (Stress Degree Days). They made field experiments in several regions of US for a