Journal of Northwest Normal University(Natural Science) 2009 Issue 3 Stability and periodic solutions in a predator-prey system with delays

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Journal of Northwest Normal University(Natural Science)
1001-988X
2009 Issue 3

Stability and periodic solutions in a predator-prey system with delays
LI Xiao-ling;HU Guang-ping

..............page:1-3,21

Monotone iterative method for fourth order nonlinear boundary value problems
ZHANG Ting

..............page:4-6

A study on regional innovation capacity evaluation in Gansu Province
YAN Jiang-ping;ZHAO Hai-li

..............page:116-119

Analysis of the economic benefits on the main crops of Qapqal County in Xinjiang
LI Zhi-zhong;MA Rong;MA Peng

..............page:111-115

Quantitative analysis and evaluation of the characteristics of industrial structure in Qinghai Province from 1949 to 2007
ZHANG Hai-feng;BAI Yong-ping;LIU Feng-gui

..............page:105-110

Application of delay logistic model in theory of tourism area life cycle——Case studies in Millennium City Park and Longmen Grottoes
ZHANG Liang-yong;XU Zhong-min;JIAO Wen-xian

..............page:100-104

Community characteristics of soil ciliates in scenic spots and historic sites of Pingliang Kongtongshan
MA Zheng-xue;QIN Jie;LIU You-bin;NING Ying-zhi

..............page:93-99

A study on seeds germination of five species(ten populations) of Saussurea DC.in Qinghai-Tibetan Plateau
WANG Yi-feng;LI Yan;DAI Jian-xiao;HU Yue;WU Ling-yun;WANG Yun-jin;WANG Zhuan-li;LIANG Wan-fu

..............page:87-92

Seed germination responses of Hippophae neurocarpa endemic to the Qinghai-Tibetan Plateau to temperature
SUN Kun;TANG Jie-juan;SU Xue;CHEN Wen;ZHANG Yu-na;WEN Jiang-bo

..............page:83-86

Synthesis of arylidene Meldrum's acids using PEG-400 as green reaction media
WANG Xi-cun;YE He-lin;QUAN Zheng-jun;GONG Hai-peng;LI Lei;CAO Xiao-feng

..............page:79-82

Synthesis of tributyl citrate catalyzed by SO^2-₄/Al-PGS solid acid
CHANG Yue

..............page:74-78,82

Synthesis of dimethyl carbonate over ZnO-TiO₂-SiO₂ composite catalysts
GUO Xiao-jun

..............page:69-73

Preparation, characterization and performances of PW₁₂/PANI/TiO₂ nano-composite photocatalyst
YANG Wu

..............page:63-68

Determination of amitriptyline and nortriptyline in human urine samples using CE-ECL detection
CHEN Hui;HUO Shu-hui;ZHOU Min;MA Yong-jun;MA Ming-guang;WANG Jiu-chun;YUAN Li

..............page:58-62,73

Chaos control using sliding-mode theory
PEI Dong

..............page:54-57

Study on the improvement design for the reliability of medium frequency power supply control circuit
SUN Bing

..............page:49-53

An implementation of an addressbook application based on Qt & embedded Linux
MA Yong-jie;YUAN Qiu-lin;ZHANG Yan

..............page:45-48

Multi-recipient signcryption scheme based on self-certified cryptography
WANG Cai-fen;YU Hui-fang;WANG Zhi-cang;CHENG Wen-hua

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

Theoretical study of generalized oscillator strengths for valence-shell excitations of argon
YUAN Hui

..............page:38-41

Theoretical study on the process of chemical reactions of lightning-generated NO
YUAN Ping;ZHAO Xue-yan;OUYANG Yu-hua;GUO Yi-xiao

..............page:33-37

Normal modes and melting property of (AgI)₆ cluster
CHEN Hong-shan

..............page:29-32,37

On the solution to the Faddeev model
JIA Duo-jie;JI Yong-lin;XI Guo-zhu;LIU Feng;QIU Chun;PANG Cheng-qun;GAO Hui-yun

..............page:26-28

A new filled function with one parameter
YUAN Cui-cui;MA Yu-hong

..............page:22-25

A polynomial approximate algorithm to TSP
LIU Xin-sheng;CHEN Hai-yu

..............page:19-21

Measure extension on a class of sets
LIU Hong-gang;FENG De-cheng

..............page:16-18

Elementary maps on triangular algebra
WEI Miao;ZHANG Jian-hua

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

Pushouts pullbacks and injectivity properties of modules
LIU Jun

..............page:10-12,21

Flat covers and general flat preenvelopes
WEI Chong-qing

..............page:7-9