1999～2002年《贵州大学学报(社会科学版)》载文及引文分析

运用文献计量学的研究方法,对1999～2002年《贵州大学学报(社会科学版）》所载论文的我文量、引文量、引文语种分布和引文类型等进行了综合统计分析。     

论科技期刊在市场竞争中的生存与发展

论述了在市场经济条件下必须重新认识科技期刊的地位和作用,发挥期刊自身的优势,适应市场竞争的需要,为科研、生产服务,加速科技成果向现实生产力的转化,以质量求生存,以创新求发展。     

疏勒河流域中下游景观格局动态变化分析研究

1：10万土地利用现状图和地形图,对疏研究,结果表明：疏勒河流域中下游景观指数呈波形变化,1990～1994年,景观多样性指数和均匀度指数呈增加态势,1994～1999年呈减小态势,而景观优势度指数的变化态势与上述两个指数的变化态势相反．各景观要素的转化使疏勒河流域中下游的景观格局向两个不同方向发展：一方面在靠近水源和流域的中上游地带,农耕发达,一般形成集约化、灌溉系统完善的农田景观;另一方面,随上游水资源利用程度的不断提高,在远离水源或流域下游地带,天然生态体系破坏不断加剧,区域景观向荒漠化方向发展,说明流域中上游人工绿洲的形成与发展是以流域下游天然绿洲大面积荒漠化为代价的．     

随机控制中的一个变分方程问题

讨论了一个变分方程问题 ,证明了其解的存在性并给出了它的解析表达式 ,还指出了它在随机控制中特别是在有界速度跟踪器上的重要应用 .     

从检索途径看国内检索期刊质量问题

文章从索引设置的3个方面，阐述了检索期刊途径设置状况，通过与国外检索期刊的比较，提出了今后应注意与改进的具体措施。     

Somatic variation in micropropagated clones ofCichorium intybus

Summary An experiment aiming to establish whether temporary or persistet somatic variation can arise in clones obtained in vitro by micropropagation has been performed onCichorium intybus. The results point out that persistent modifications of the phenotype can be observed after six cycles of cloning and that when the length of the cloning period is varied these appear to be differential responses of the same genotype to the micropropagation.     

New Trend of Management Science - Managerial Bioengineering System

This article seeks to depict the management science＇s new trend - managerial bioengineering system which is making decisive influence to enterprise management, generalizes the characteristics and categories of managerial gene variation, and brings forward a managerial genome plan with 5-＂All＂： participation of all members, enjoyment of all aspects, accumulation of all time, devotion of all strength and operation of all speed.     

投影距离的概率峰值效应及其在三维目标识别中的应用

在计算机视觉中，由于物体的几何特性随视线的变化而变化，从而给三维目标识别带来了困难．在设计识别算法时，关键是理解目标重要特征的变化，如角度、距离等的变化．在视线方向各向同性条件下，投影角度和距离的概率密度在其原值附近具有峰值效应，即投影角度及距离接近于原角度及距离．利用投影角度的联合概率函数可识别多面体．在已知距离时，为了便于识别目标，导出了投影距离的密度函数．实验结果证明了该方法的有效性．     

宁夏师范学院图书馆期刊工作的发展历程和利用价值体现

叙述了30余年来宁夏师范学院图书馆期刊工作的发展历程,探讨了期刊工作对学校教学科研、升本评估等方面所作的贡献。     

Parasite community of the golden cownose ray Rhinoptera steindachneri Evermann and Jenkins 1891 (Chondrichthyes: Myliobatidae), in Acapulco Bay,Guerrero, Mexico

The parasite community of the ray Rhinoptera steindachneri from Acapulco Bay was examined and quantified; analyses were based on the sex of the host and the date of sampling. A total of 171 specimens of R. steindachneri were examined during July–August of 2010, and May and July of 2012. Twenty-one species of parasites were found: three species of Monogenea; eight adult and one larval species of Cestoda; one larval species of Nematoda; five species of Copepoda; two species of Isopoda; and one species of Hirudinea. Cestodes had the greatest species richness (43% of the total species), followed by the copepods (24%). Two species of cestode, Glyphobothrium sp. and Rhinebothrium sp., were collected only from adult rays. At the component community level, species richness showed statistically significant variation between 13 and 16 species, which is similar to previous reports for other species of rays. The parasite component communities and infracommunities of R. steindachneri exhibited similar patterns: high species number and low numerical dominance by a particular species of parasite. The differences of body size of male vs. female rays, and a change in diet and feeding behaviour with the age of R. steindachneri, are likely important factors in the structuring of their parasite communities.