Journal of Lanzhou University（Natural Sciences） 2003 Issue 3 Some congruences on eventually regular semigroups

Some congruences on eventually regular semigroups
luo yan feng ; yang dong

..............page:1-3

On residual finiteness of π-inverse semigroup
tian zhen ji ; yan ke ming ; li dun gang

..............page:4-7

An enumeration problem related to Catalan number
li you lin

..............page:8-10

Comparison between a system of used components and a used system
zhang shu hong ; li xiao hu

..............page:11-13

A conjecture for the incenter simplex
ma tong yi

..............page:14-16

Fuzzy-valued functions of bounded variations and its differentiability
gong zeng tai

..............page:17-21

Analyses on the dynamical stability of the coupling control system for maglev vehicle travelling on a single-span flexible guideway
wu jian jun ; zheng xiao jing ; zhou you he

..............page:22-26

A study on the restrict valid exponent γof explosive welding
xie fei hong ; wang jun ; zhang ling zhao ; zhao fu xing

..............page:27-30

Preparation of porous NiTi shape memory alloy and its microstructure analysis
da guo zu ; xia tian dong ; wang tian min ; li si yuan

..............page:31-34

Study on optimization of capacity and flow assignments in computer communication networks based on tabu search algorithm
shen jian ; xu fu yong

..............page:35-39

A special agent (holon) and its application in electronic procurement
zhou san yuan

..............page:40-42

The total synthesis of 7,8-(2,2-dimethylpyrano)-4′-methoxyflavanone
xue ji jun ; zhang ying peng ; chen xue song ; li zuo

..............page:43-45

A study on the structure and properties of a superabsorbent polymer
liu ming zhu ; zhan fa lu ; jiang hong shen

..............page:46-49

In vitro conversion of Cattleya root tip into plantlets
ding lan ; liu guo an ; yang hong

..............page:50-52

The preventive function of compound Hippophae rhamnoides L. against ischemic cerebral infarction in rats and mice
gao li ping ; cheng ti juan ; wang yu bin ; sun yi fang ; zhang jian

..............page:53-56

Studies on the relations between fetal distress and IL-1,IL-6,IL-8 and TNF-α
he xiao chun ; li fu ping ; ma lin xiu

..............page:57-59

Fuzzy mathematical model of water fitness for artificial sand-binding vegetation in desert and its application
yue dong xia ; li zi zhen

..............page:60-63

The effect of supplementary rainwater irrigation on broccoli in the Northwest Loess Plateau of China
wang ya jun ; zhang zhi shan ; xie zhong kui ; wei xing zuo ; li feng qin

..............page:64-68

Willingness to pay for the restoration of the ecosystem in Ejina Qi,Inner Mongolia,China
chen dong jing ; xu zhong min ; cheng guo dong ; zhang zhi qiang ; su zhi yong ; lin qing ; zhang hai tao

..............page:69-72

Study on a potential eco-environment evaluation based on GIS in Longzhong Loess Plateau
zhang xiu ying ; zhao chuan yan

..............page:73-76

Progress in the studies of eco-environmental fragility and assessment in China
yao jian ; ai nan shan ; ding jing

..............page:77-80

Development and realization of an information system for geological data based on WEBGIS
hu jian wu

..............page:81-83

A sedimentary environment analysis and the tectonic uplift of Linxia Basin in the northeast margin of Tibetan Plateau
fan ma jie ; song chun zuo

..............page:84-89

A study of the engineering specific properties of N-sandstone in Lanzhou
dong lan feng ; chen wan ye

..............page:90-93

A study on the floods and the cultures of 4000 years ago
cui jian xin ; zhou shang zhe

..............page:94-97

er yi san an wu yi suan - , - shuang ji chun er dan zuo gd( ),fe( ) he mn( ) pei he wu de he cheng he xing neng yan jiu
tang hui an ; yang sheng ; huang yong ; yang ru dong

..............page:98-100

mao xi guan jiao shu dian dong se pu ce ding da huang ji fu fang zhi ji zhong zuo zuo hua he wu
zhang ji you ; li qian feng ; pan zhong wei ; chen xing guo ; hu zhi de

..............page:101-102

wei ru ye zhong xiao mai pei zhi fang mei cui hua san you suan gan you zhi de shui jie fan ying
jing fei ; an xue qin ; shen wei guo

..............page:103-104

hai zhou chang shan ye hui fa xing hua xue cheng fen yan jiu
zuo shi cai ; tian

..............page:105-106

shan sheng liu zhong de fen lei yan sheng wu
feng shi lan ; shi min yan ; hu fang di ; chen li ren ; su ce

..............page:107-108