1) phase group characteristic
相群特征
2) Community characteristic
群落特征
1.
A study on the comparision of community characteristic between different age Metasequoia glyptostroboides plantations;
不同林龄水杉人工林群落特征比较研究
2.
The protect countermeasure of wetland based on winter migrant bird s community characteristic;
基于群落特征的湿地候鸟保护对策
3.
Study on Achnatherum splendens community characteristics and species diversity around Qinghai Lake;
青海湖地区芨芨草群落特征及其物种多样性研究
3) community characteristics
群落特征
1.
The community characteristics of soil protozoa with pollution of compound sewage from Moguhu;
新疆石河子市蘑菇湖混合污水污染土壤中原生动物的群落特征
2.
Comparisons among soil collembola community characteristics in relation to different vegetation restoration treatments in the moderate degraded grasslands in the Songnen Plain of Northeast China;
松嫩草原中度退化草地不同植被恢复方式下土壤跳虫群落特征比较
3.
Studies on community characteristics of Pinus tabulaeformis and Quercus mongolica forest and its species diversity of Dongling district in Shenyang;
沈阳东陵区油松栎林群落特征及物种多样性研究
4) community structure
群落特征
1.
Plant-diversity and Community Structure of Primordial Wetland in Hilly Region in Northeastern China;
东北山地沼泽湿地植物群落特征及植物多样性研究
2.
Then the community structure of these 2 species was investigated.
对这两种植物的群落特征进行调查发现,这两种植物具有相似的生态适应性,可共同生长于同一生境中,为害深圳市多种本地植物,对低矮乔木、灌木和草本植物为害严重,对高大乔木的为害不明显。
5) community character
群落特征
1.
Study on plant community characters and soil properties of Artemisia firigida grasslands after different enclosing times;
不同围栏年限冷蒿草原群落特征与土壤特性变化的研究
2.
Studies on Water and Community Character of Caragana Intermedia Grassland in the East Desert of Yellow River in Ningxia;
宁夏河东沙地不同密度柠条灌丛草地水分与群落特征的研究
3.
The result shown that the community character depends on the degree of disturb,the Ⅳ(importance value)of Stipa glareosa increased under middle level disturb and decreased under heavy disturb, at the same time the superiorspice is became Christolea crassifolia.
通过对临时公路干扰下西藏阿里地区温性荒漠草原草地的调查研究,从群落特征、多样性、生产能力和有性更新能力几个方面分析其对干扰的响应和作用规律。
6) population characteristic
群体特征
1.
Analysis on population characteristic of Nightingale award winners in China;
我国南丁格尔奖获得者群体特征分析
补充资料:半群的特征标
半群的特征标
character of a semi - group
半群的特征标{d皿raCterofa胭ni.g欧甲;”甲眼.印IIO月”pyU四】 具有单位儿的交换半群S到由所有模为l的复数及零组成的乘法半群的非零同态.有时半群的特征标也理解为到模眨}的复数的乘法半群的非零同态.当S是Cli月劝心半群(Cllfford semi一『ouP)时,半群特征标的这两个概念是等价的.半群S的所有特征标构成的集合N*在点态乘法,. (x*举M‘、}立x(a冲(。).a任S,x,势于兮’}:成为一个具有单位儿的交换半群(特征标半群(character sem卜grouP)). 半群S的理想尸称为全孤立的(totally isola-t曰》(素的(P rlme)),如果S、尹是子半群.具有单位元的交换半群的全部全孤立理想的集合在并运算下成为一个半格.这个半格同构于S*的幂等元的半格,见幕等元的半群(ldenl因tents,se。卜咨oup of).交换半群S的特征标称为分离S的元素,如果对任何a,b任S,a并h,必有x任S幸使/(a)笋烈句.设S有单位元,则半群S的特征标分离s的儿素当且仅当‘是可分半群(望pardble犯m卜grouP).有单位元的任意交换半群的特征标半群的刻画问题,化为那些是群的半格的半群的特征标的刻画几」j这个半格满足极小条件时相应的刻画(例如)可参见{l}文献{2}中有特征标半群的·个抽象刻画. 对睡个u‘片z任万*、映射升z,飞(a)(z任S’)是半群S*的特征标,即了任S巾*.映射田;a。,厅是S到S’‘内的同态(所谓典范同态(以nonical homornorp-油m))如果田是s到S*’上的同构,则称对娜宇孕(dt画ty theorem)对于S成立.对于有单位儿的交换半群S,对偶定理成立,当且仅当S是逆半群(【31).关于特征标半群在拓扑情况下的对偶性问题可见拓扑半群(topok〕gi口1 semi一grouP)
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条