Journal of Northwest Normal University(Natural Science) 2004 Issue 1 zhi xie

zhi xie
xi bei shi fan da xue xue bao bian ji bu

..............page:封二

Present state and improving countermeasures on the fundamental research of natural science in Norwest Normal University
zhang xi ai ; chang zheng xia ; zeng qing ping

..............page:115-117

Advance of chemical constituents and pharmacological acitivty of Akebia Decne
gao li ming ; he yang qing ; wei xiao mei ; zuo hai yan

..............page:108-114

Characteristics and suggestions on experiment test in chemistry contest
lu quan fang ; gao jin zhang

..............page:104-107

A method of measuring signal distortion factor by spectrum analysis technology
chen xue huang

..............page:101-103

Probe on P.E course reform in western elementary and high schools
zhang xing qi ; xu shi yan

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

The connotation and characteristics of the traditional Chinese National Physical Education
lu ping sheng

..............page:94-97,100

An evaluation and countermeasure on the Han nationality student's physique condition in Gansu Province
duan hai jun

..............page:91-93

Study on geographical conditions and altitude training
zhang zuo ; zhang ge ; han zuo sheng ; chen geng

..............page:87-90

Quality evaluation and optimizing countermeasures on tourism environment of historical and cultural cities--A case study of Tianshui City in Gansu Province
xiao xing ; wang ping ; wang li an

..............page:81-86

Feature and mechanism of the social-economic system in poverty-stricken areas characterized by ecological frailties--Taken Longnan District as a case
wang lu cang ; xie yong cheng

..............page:76-80

Studies on biomass and productivity of Pinus tabulaeformis planation in the Wufengshang of Wudu,Gansu Province
yang dong ; yang xiu qin

..............page:70-75

Studies on the chemical constituents of the essential oil of Artemisia annua L.in Xinjiang
zhang yan ; zhang ji ; yao jian ; wang lai ; huang ai lun ; dong li na

..............page:67-69,86

Study on tissue culture of Encommia ulmoides Oliver
wang dong liang ; ding lan ; wei zuo jin

..............page:64-66

Study on synergy of polysaccharide from sophora alopecuroides bean with xanthan gum
guo shou jun ; yang yong li ; gao juan ; yang meng ; yao jian ; zhang ji

..............page:61-63

Analysis of petroleum pollutants in Yumen's mining areas by gas chromatography and mass spectrometry
zhan hui ying ; yuan jian mei ; chen hui

..............page:56-60

The energy growth property for p-harmonic maps
liu jian cheng

..............page:16-19

Periodic multiple solutions for second order differential equations in Banach spaces
meng hai xia

..............page:13-15

Stability of zero solution of a delay differential equation under impulsive perturbations
ding wei ping

..............page:8-12

Existence of solutions for nonlinear second order boundary value problems in ordered Banach spaces
li yong xiang

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

The upper and lower solution method of nonlocal problem for the first order ordinary differential equation
ma ru yun

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

Preparation and properties of pH-sensitive chitosan-polyvinyl pyrrolidone hydrogels
song peng fei ; wang rong min ; wang yun pu

..............page:53-55

The extraction and character of red radish pigment of Lanzhou
xue hua li ; fu zheng sheng ; wang chang qing ; liu mao dong ; gao ju yong ; ma jing yi

..............page:51-52,55

Analysis on chemical components in Elsholtxia fruticosa Rehd by gas chromatography and mass spectrometry
zheng shang zhen ; ma xue mei ; que sheng ; hu hao bin ; shen xu wei

..............page:48-50

Synthesis and biological activity of N-aryl-N′-(o-nitrobenzoyl)thiourea derivatives
wei tai bao ; wang hai ; zhang you ming ; yao hong ; wang xiu chun

..............page:45-47,50

Synthesis of N-aryl-coumarin-3-carboxamides by room-temperature grinding under solvent-free condition
li zheng ; yu jin lan ; wang xi cun

..............page:42-44

Perturbation analysis for higher order equation of longitudinal oscillation of a nonlinear elastic rod
guo peng ; zhang lei ; lv ke zuo

..............page:38-41,44

Self-similar solutions for the Gardner equation
dou fu quan ; sun jian an ; lv ke zuo ; zhu guang hua ; hong xue ren

..............page:35-37

Perturbation analytics of(3+1) dimensional weak nonlinear ion acoustic wave in plasmas
zhang lei ; guo peng ; lv ke zuo

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

Digital image hiding based on a kind of generalized Bernstein base
zhao xue feng

..............page:28-30,34

Monoids over which all weakly flat acts are flat
shi ai ling ; wang ya qin ; liang ruo zuo

..............page:25-27

The characteristic polynomials with respect to some unary operations on plane graphs
chen xiang en ; zuo jing zhi

..............page:20-24