蓝色的生存寓言--读宗良煜的长篇小说《蓝色的行走》

宗良煜的《蓝色的行走》是一部人类的生存寓言。小岛，大船，隐喻着“原始”与“现代”的关系。它们既有变汇相融。又有着碰撞和不和谐。“蓝色”赋予了文本以飘逸空灵的诗意，把小说叙述最终本体化，并借助想象和虚构，扩大了文本的精神容量，也提高了作品的艺术纯度。给人们带来了超验和吊诡的阅读历险。     

K-桥图的本原指标

K-桥图是由连接A，B两点的K条内部不交路所组成的图．计算得到本原K-桥图的本原指标等于m-1或n-1，其中m是最大奇圈的圈长，而n是A，B间最长奇路(偶路)与最短偶路(奇路)的长度之和．     

同步互斥机制中的读者-写者模型

对进程同步互斥机制中读者-写者模型的3种常见类型及其2种变形进行了分析,给出了各种情况下基于P、V原语和信号量机制的解决方案,最后指出了解决这类问题的关键技术在于:采用资源计数变量把对资源的访问控制转换为对变量的访问控制.     

关于半原根

给出半原根的概念，并讨论半原根存在的充要条件，还给出了在一个模m的既约剩余系中，对于模m的半原根的个数。     

群环为本原环的一个充要条件

设R为有1结合环,G为任意群,本文给出了群环RG为本原环的一个充要条件。     

A paleontological perspective of vertebrate origin

The Early Cambrian Haikouichthys and Haikouella have been claimed to be related to contribute in an important way to our understanding of vertebrate origin,but there have been heated debates about how exactly they are to be interpreted. New discoveries of numerous specimens of Haikouichthys not only confirm the identity of previously described structures such as the dorsal and the ventral fins, and chevron-shaped myomeres, but also reveal many new important characteristics, including sensory organs of the head (e.g. large eyes), and a prominent notochord with differentiated vertebral elements. This “first fish” appears, however, to retain primitive reproductive features of acraniates, suggesting that it is a stem-group craniates. A new order (Myllokunmingiida) and a new family (Myllokunmingiidae) are erected, and a new species, Zhongjianichthys rostratus (gen. et sp. nov.), is described herein. Over 1400 newly-discovered specimens of Haikouella provide a wealth of anatomical information on this organism. It differs from chordates in many organs and organ systems, including the skin, muscles, respiratory, circulatory and nervous systems.In contrast, its body-design resembles that of vetulicolians,and the presence of a “transitional” nervous system with both dorsal and ventral nerve cords suggests an affinity with living hemichordates. On the basis of these and other recent findings of fossil deuterostomes, a five-step hypothesis for vertebrate origin is proposed, intended to bridge the long-standing gap between protostomes and vertebrates. Four of the five steps accord with established ideas current in modern evolutionary zoology. Evidence for the first step is obtainable only from fossils, and specifically from fossils found from South China, hence the crucial importance of S. China sites for our understanding of early vertebrate origins and evolution. Accordingly, South China is suggested as the oldest-known birthplace of the whole vertebrates.     

第一类原始递归算术 A_0 甲

本文把文[3]中的规则θ_2~*去掉,从而得到第一类原始逆归算术A~0V_1V_2系统,即系统A_0甲,这里A_0为存在性公理V_1与I_2为唯一性规则(见正文)。     

三维立体零件几何造型试验系统研究

介绍了一个三维零件几何造型的试验系统,系统具有体素构型功能、集合运算功能和消除隐藏线功能。最后,给出若干实例。     

丢番图方程(8a3-3a)2x+(3a-1)y=(4a-1)z

应用Bilu，Hanrot和Voutier关于本原素因子的深刻理论及二次数域类数的一些结果证明了丢番图方程(8a3-3a)2x+(3a2-1)y=(4a2-1)z仅有正整数解(x,y,z)=(1,1,3).     

从史前岩画看中国原始舞蹈的艺术特征

通过对中国境内发现的史前舞蹈岩画的分析,可以了解中国原始舞蹈艺术的产生、种类、特征、功能等情况。对我国史前岩画的分布和表现形式做了概述。我国原始舞蹈主要包括生产舞、性爱舞、娱神舞、战争舞等四大类。第三部分通过岩画从三个方面对我国原始舞蹈的外部特征进行了论述。第四部分对我国原始舞蹈的功能进行了总结。