Journal of Northwest Normal University(Natural Science) 2007 Issue 2 The 2-distance chromatic number of Cartesian product of graphs

The 2-distance chromatic number of Cartesian product of graphs
CHEN Hai-yu;LIU Xin-sheng;CHEN Xiang-en

..............page:12-15

The existence of solutions of Carathéodory systems
MA Xue-min

..............page:9-11

Existence of solutions for periodic boundary value problem of second order impulsive differential equation with derivative term
LIU Xu;ZHOU Wen-xue

..............page:5-8,15

Global exponential stability of Hopfield neural networks with time-varying delay and the estimation of decay rate
ZHANG Li-jie

..............page:1-4

The strong chromatic index of graphs with maximum degree 5
LIU Shun-yi;CHEN Xiang-en;LIU Xin-sheng

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

The low frequency virtual oscilloscope based on TLC2543 and VB
MA Sheng-qian;YANG Hui-juan;LIU Jun-hu

..............page:41-43

Direct synthesis of SBA-15-SO3H and preliminary study of adsorption of dibenzothiophene
TAO Xiao-juan;DU Xin-zhen;DING Ning;LI Chun-lan;CHEN Hui

..............page:44-49

Preparation and anticancer activity of chitooligosaccharide porphyrins metallic complexes
LI Yan;XIE Yun-tao;HE Yu-feng;WANG Rong-min;DING Lan

..............page:50-52,56

Synthesis and characterization of 2-substituted-5-(2-benzo(b)furan)-1,3,4-oxadiazoles under microwave irradiation
WANG Xi-cun;YANG Zhi;ZHU Ji-hua;SONG Ai-ying;QUAN Zheng-jun

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

Progress on research method of cell apoptosis
L(U) Ying;ZHANG De-lu;ZHANG Hong;WANG Gao-hong;LIU Yong-ding;HU Chun-xiang

..............page:82-87

Research on the process and social driving forces of land use change in Lanzhou City
WANG Li-juan;CHEN Xing-peng;PANG Fang-lan;PANG Juan

..............page:88-92

Analysis on ore-formation conditions and character of in-situ leachable sandstone-type u-ranium deposit in Lenghu region of Caidam basin
XIN Cun-lin

..............page:93-97

Building on male 110m hurdler's special ability index system and performance predicted model
DENG Yun-ling;ZHANG Guang-lin;XU Shi-yan;WANG Zong-bin

..............page:98-101

Research on pre-competition training about Marathon athletes
PAN Jian;WANG Zong-bing

..............page:102-104

A historical perspective of the evolution of school mathematics curriculum in the United States of America (1900-2006)
L.Diane Miller

..............page:105-109

Analysis of relative factors on constructing further educational curriculum system for mathematics teachers
LI Bao-zhen;SUN Ming-fu

..............page:110-113

How to choose the most effective physical education teaching models
CHANG Yi-chen;WEI Zheng-guang

..............page:114-117

xi bei shi fan da xue xue bao : zi ran ke xue ban zheng gao jian ze

..............page:封2

Special properties of rings of twisted generalized power series
YAN Xing-feng

..............page:20-23

Dual superconductor mechanism of Yang-Mills theory
AI De-zhen;JIA Duo-jie;LI Yan-wei;PANG Cheng-qun;GAO Hui-yun;QIU Chun

..............page:24-28,49

State equation and thermal capacity of a dusty plasma
LI Sheng-chang;DUAN Wen-shan

..............page:29-32,59

A method for finding similarity solution of (2+1)-dimensional nonlinear partial differential equation(s)
GUO Zhi-rong;YI Jin-qiao;DUAN Wen-shan;L(U) Ke-pu

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

The solitary wave solutions with varying velocity for the (3+1)-dimensional variable-coefficients ZK equation
YANG Hong-juan;L(U) Ke-pu;DUAN Wen-shan;SHI Yu-ren

..............page:38-40

Synthesis and characterization of carbazole based dithiosemicarbazones
LI Zheng;XING Yu-lin

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

Study on the chemical constituents of Delphinium grandiflorum L.
HAN Yi-li;GAO Li-ming;ZHU Kai-li;LI Wei;WEI Tai-bao

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

Analysis on genara of flora in Baishuijiang national reserve in Gansu Province
CHEN Xue-lin;TIAN Fang;QI Peng-cheng

..............page:64-71

Studies on community structure of ciliates from activated sludge in Yanerwan sewage plant in spring
LU Yun-zhong;NING Ying-zhi;MA Zheng-xue;LIU Zhi-feng

..............page:72-76

Community structure of ciliates in the cage fish culture farm of Liujiaxia reservoir in spring
LIU Zhi-feng;NING Ying-zhi;MA Zheng-xue;LU Yun-zhong

..............page:77-81,92