共查询到20条相似文献，搜索用时 81 毫秒
1.
2.
3.
4.
为了使大容量的多媒体数据在网络上有效的传输，必须对多媒体数据进行压缩。对多媒体数据压缩中的几种无损压缩方法进行了比较，并对每种方法用一个例子说明。 相似文献
5.
罗利群 《中国科学院研究生院学报》2005,1(12):561-564
将怀化秤锤树Sinojackia oblongicarpa C. T. Chen & T. R. Cao处理为肉果秤锤树 Sinojackia sarcocarpa L. Q. Luo的新异名。 相似文献
6.
本文论证了Ｃｎ×Ｔ仍是Ｈａｍｉｌｔｏｎ圈的充要条件是ｄ（Ｔ）≤ｎ,从而得出连通图与Ｈａｍｉｌｔｏｎ图的笛卡尔积是Ｈａｍｉｌｔｏｎ图的充分条件。 相似文献
7.
9.
10.
引用层多播技术在网络层多播不能全面扩展的今天,有着巨大的发展潜力.它的应用,不仅可以降低网络流量消耗,增加网络带宽的利用率,而且可以方便多播体系的建立和管理. 相似文献
11.
12.
通过刺激——反映（S-R）联结,每个人在学习历程中建立起一系列习得性的对自身行之有效的学习策略和学习习惯。作为教师,针对学生不同学习类型的认识,可以更好的引导学生,帮助他们认识自己,发掘自身潜质,形成自己独创性的良好学习习惯,从而极大的发挥其主观能动性。 相似文献
13.
14.
15.
16.
17.
18.
向秋云 《中国科学院研究生院学报》1987,25(2):125-131
Cornus L. s. 1. is a large polytypic genus. The classificantion of which has been
so different that some authors recognize several separate genera, while others treat them as ei-
ther subgenera or sections. New evidence from many disciplines such as palynology, cyto-
logy, wood anatomy and embryology supports the view that the genus should remain in the
broad sense. I basically agree with the treatment by Ferguson (1966b) before my finishing
a comprehensive study on Cornus L. s. 1. except for supporting the separation of subgenus
Afrocrania as an independent genus. A new subgenus Sinocornus Q. Y. Xiang, containing
one species, C. chinensis Wangerin, is established here on account of its inflorescence axillary
and different from the other members of the genus which all have terminal inflorescences only.
The inflorescence developed from a terminal bud implicates the sympodial nature of axis of
stem and the one from an axillary bud the monopodial one. It is reasonable to regard the
character as of subgeneric value. Also a new combination, Cornus subgen. Syncarpea (Na-
kai) Q. Y. Xiang, is proposed here as a substitute for Cornus subgen. Benthamia (C. B. Clar-
ke) Schneider used for a long time. Because the valid publication of the former name subgen.
Syncarpea Nakai is earlier than the latter one. The types of inflorescences of 8 subgenera re-
presented by type or selected species are illustrated. 相似文献
19.
20.