Journal of Yanan University(Natural Science Edition) 2012 Issue 4 A Recursive Formula for Calculating the Combinations Number

A Recursive Formula for Calculating the Combinations Number
ming dao zhong

..............page:26-27

yan an shi xin nong cun ti yu jian shen gong cheng de xian zhuang ji ti sheng lu jing
li zuo ; wang zhen ; lu zhong zuo

..............page:95-98

Current Situation and Analysis of Badminton Sports in Baota District, Yan an City
liu ran ; zhang ying cang

..............page:99-103

ahm zai ying jie bi ye sheng jiu ye xuan ze zhong de ying yong
yue yu ying ; liu xing xiang ; yang zuo

..............page:28-31

ji yu net de jing pin ke cheng zong he ying yong xi tong she ji yu shi xian
ye zuo

..............page:32-34

Identification of Cramer Ruler over Quaternion Field by Using Two Different Methods
li shu hai

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

yan an da xue tian jing yun dong hui kan tai wen hua de yan jiu
geng qi long ; yin chao ; xue gai ling

..............page:104-108

Design and Research of Microstrip Radio Frequency Band Pass Filter
cao xin liang ; li jian xin ; fan yan hu

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

Investigation and Analysis of Enterprise Staff Sports Exersise Cirsumstance in Yan an City
wang cong ; chang bao rong

..............page:109-112

On ( m, n ) - Coherent Rings
gong zhi wei

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

High Power Fator and Programable Swith Power Design Based on MSP430
song lei

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

hao gang ling bo shi

..............page:F0003-F0003

li wei dong jiao shou

..............page:F0002-F0002

Determination of Osmium Bipyridine at ITO Electrode by Catalytic Voltammetry
zou rui

..............page:41-45

Discussion about the Existence of the Diophantine Equation
tuo xiao quan ; wang cai ning ; guo jin bao

..............page:7-8

Visible Photocatalytic Activity of P25 Modified by Methionine
ma jian

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

On Two Asymptotic Fomulas of Smarandache Pseudo - multiples Of 5 number Sequence
wang xiang yuan ; guo jing jie

..............page:9-10

Feasibility Analysis on the Wastewater Utilization in Yan an City
liu yu ; liu duo ; zhao li ke ; xu min

..............page:50-53

Two Weak along with Relationship between the Matrix
zhang hui ; yue yu ying ; bai yong ju

..............page:11-12

wu qi xian jin 50 nian qi wen he jiang shui te zheng fen xi
zhang ai li ; su feng

..............page:54-55

Effect of Different Irrigation and Fertilizer Treatments on the Physiological and Biochemical Indexes of Pear Jujube Leaves
feng xiao dong ; lei chao ; wang zuo ; chang hai fei

..............page:56-59

A Sufficient Condition of the Differentiable Function in the Interval
feng han mei ; zhao hua xin

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

Intrinsic Fracture Identification of Yanchang Formation in Northern Shaanxi
yao sheng lin ; ma yu jia

..............page:60-62

On Diophantion Equationx^2+4^4=y^7
ran yin xia

..............page:14-15

Analysis on Characteristics of Tight Sandstone Gas Regions in China
xing fu yin ; guo jin ; zhang wei jie

..............page:63-67

Weak n -Times Integrated Semigroups Topological
bi wei

..............page:16-17

Influential Factors of Reservoir Performance of Triassic Chang 6 Formation in Fuhuang Oilfield, Ordos Basin
wang li long ; wu fu li ; wang er hu ; wang kai ; luo xing ; lei xun

..............page:68-70,74

The Characteristic and Depositional Factor of Yan 9, Yan 10, Chang 1 Key Beds of Dingbian Area, Ordos Basin
guo yong zuo ; wu shao bo ; xiong zhe

..............page:71-74

e er duo si pen di dong nan yuan han cheng kuang qu mei ceng qi fu ji ying xiang yin su yan jiu
li jian dong ; shi bao hong

..............page:75-78

Oscillation Comparison Theorem for a Kind of Functional Differential Equation with Advanced Argument
shuang rui tao ; qin hong li

..............page:18-20

Hydraulic Jet Fracturing Technology in Thin Oil Reservoir with Bottom Water Application
he peng ; liu han mei

..............page:79-80,83

zi chang you tian mei yao cai kong qu qian ceng cong shi jing zuan jing ji shu
jin yong hui ; li jia xin

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

A Simple Method for Standard Equation into Parametric Equation of the Surface of Second Degree W;AT~_ ~_,,; _ ,,,.
wang gui jun

..............page:21-22

fu ya fen ceng cai you ji shu zai yong ning you tian ying yong xiao guo fen xi
tian geng hu

..............page:84-85

shi qi zuo ye xian chang an quan guan li tan tao
zhang zhao hong

..............page:86-87

Strong Convergence Theorem of Common Fixed Points of Two Kinds of Mappings in Normed Linear Space
dong hua

..............page:23-25,27

shan bei cun luo ti yu yan jiu
du chun bin

..............page:88-90

Presnt Situation Investigation and Countermeasure Research of Institution Staff Sports in North Shaanxi City ---take Shaanxi province Yanan city, Yulin city as an example
li hong liang ; lu zhong zuo ; li xiang ru

..............page:91-94,98