素数在域 上素理想分解

Let F = Q( ln√u), l an odd prime number. In this paper, we give prime ideal decompositions of odd prime numbers p over the integral ring OF .     

四基数模集合剩余数至二进制数转换器设计

针对并行运算的剩余数系统,提出了一个新的4基数模集合｛2^n ,2^n＋1,2^n/2＋1,2^n/2-1｝,并基于新中国余数定理和混合基转换算法实现该模集合下剩余数至二进制的转换,给出相应硬件电路。与同类模集合反向转换器相比,文中提出的转换器电路完全基于加法器实现,硬件电路简单,明显减小了面积,提高了转换效率。     

Study on properties of residue-residue contacts in protein

Residue-residue contacts are very important in forming protein structure. In this work, we calculated theaverage probability of residue-residue contacts in 470 globular proteins and analyzed the distribution of contacts in thedifferent interval of residues using Contacts of Structural Units (CSU) and Structural Classification (SCOP) software. Itwas found that the relationship between the average probability -PL and the residue distance L for four structural classes ofproteins could be expressed as lgPL=a b×L, where a and b are coefficients. We also discussed the connection between twoaspects of proteins which have equal array residue number and found that the distribution probability was stable (or un-stable) if the proteins had the same (or different) compact (for example synthase) in the same structural class.