Mathematics in Practice and Theory 2009 Issue 21 Sudoku Puzzles Generating:From Easy to Evil

Sudoku Puzzles Generating:From Easy to Evil
xue yuan hai ; jiang biao bin ; li yong zhuo

..............page:1-7

Non-equilibrium Theory and Empirical Study of Unbalanced Supply and Demand in China\'s Real Estate Market
tang de cai ; chou yu ling

..............page:8-20

The Application of Projection Pursuit Grade Evaluation Model in Evaluating Turf Quality of Agropyron Elongatum
ji zuo qin ; li ya jun ; he yan guo ; jin long hai

..............page:45-51

A Group Decision-Making Method about Evaluating and Selecting Integrator of Logistics Service for a Supply Chain
zhang de hai ; shao pei ji ; liu de wen

..............page:52-58

Improved Study on Hua\'s Practical Macroeconomic Growth Model
li ai hua ; su jie ; jia chuan liang ; yang yu

..............page:59-63

The Dynamic Simulation of a SD Model on Ocean Sustainable Development of China
chen wei dong ; gu pei liang ; liu bo

..............page:21-30

The Integrated Valuation of Textbooks\' Publishing Quality Based on AHP
wu ren qun

..............page:30-37

Improved Spanning Tree-based Genetic Algorithm and Its Application in Cost Optimization of Logistics Dispatching System
li dong long ; li ren wang ; li yao hui ; zhang peng ju

..............page:38-44

Fuzzy Distribution Fitting for Law of Traffic Accidents based on MATLAB
wu lu rong

..............page:90-95

A Survey of Ionospheric Delay Correction Technique for Network RTK
yang ting ; guo gui hai ; zhang feng lu ; chen yi jin ; zhang guang wei

..............page:96-103

Research on Dynamic Optimal Portfolio under a Downside-risk Constraint
guo jian hua ; xiao qing xian

..............page:64-69

Research on Uniform Motion of Piston in Double Cylinder Single Acting Piston Pump
sun xun ; zhang ren jie

..............page:86-89

Research on Enterprise Optimal Investment Decision
zuo yi ming ; tian mu sheng ; cao shao zuo

..............page:70-73

Research on Parameter Estimation Method of Compertz Curve and Application
wang ji quan ; qiu li chun hong ; zhu rong sheng ; wu chang you

..............page:74-79

Study to Forecast Retire Time Limit and Supplement Quantity of Aircraft
wang li li ; chen yun xiang

..............page:80-85

A Hilbert-type Integral Inequality with a Mix Kernel
yang bi cheng

..............page:149-155

The Estimation of Percent Side and Tolerance Limits of Multinormal
li wei guo ; liu hui

..............page:104-109

Minimal Surfaces in the Minkowski-3-space
ren zhen cai ; chen jian hua ; bai han li

..............page:156-160

The Existence and Uniqueness of Limit Cycle for a Class of Planar Differential System
liu xing guo ; huang li hong ; lv yong

..............page:140-148

A Multi-attribute Decision Making Approach Based on Linguistic 2-Tuples
hao fei long ; li de qing

..............page:129-133

Existence Of Almost Periodic Solutions of Nonautonomous N-Species LOTKA-VOLTERRA Competitive Systems with Feedback Controls
feng xiao mei ; zhang feng qin ; wang kai

..............page:134-139

Exponential Stability of a Repairable Syatem with Preventive Maintenance Policy
hong hui li ; xu hou bao ; jiang li ning

..............page:110-116

Estimate the the Parameter of Fractional Brownian Motion
jin da ; li xing ye

..............page:117-121

Study on the Reliablity for Judgement Matrix of AH P Method
zhan run tao

..............page:122-128

An Endpoint Estimates for Commutators of Fractional Integral
he yue xiang ; wang xue min

..............page:192-196

Synchronization of Complex Networks Under Impulsive Control
cui song yan ; zhang zuo

..............page:197-201

Upper and Lower Solution Method for Fourth-Order Nonlocal Boundary Val ue Problem
pang hui hui ; cao li mei ; ge wei gao

..............page:202-206

Strong Convergence Theorems for a Family of Asymptotically k-strict Pseudo-contractions
zhang lei ; cui yan lan

..............page:207-210

A New Method to Solve Nonlinear Partial Differential Equation
xue chun rong ; zhang xian ye

..............page:211-213

Quadratic N umerical Range of Infinite Dimensional Hamiltonian Operator
wu de yu ; a la tan cang

..............page:186-191

Two Theorems on Large Sets of Disjoint Steiner Triple System and Kirkman Triple System
luo hong tian ; wang yu ; sun jing ; zhao jin wei

..............page:173-185

The First Cohomology Group of the Trivial Extension of the Fibonacci Algebra
fan jin mei

..............page:166-172

Optimal ity for Symmetric Arcwise-connected Convex Multiobjective Semi-infinite Programming
zhang lei lei

..............page:161-165

Solutions for Second Order Periodic Boundary Value Problem in Banach Spaces
wang lan ; liu hui zhao

..............page:221-224

A Taylor\'s Formula of Generalized Cauchy Type
su li ; zhao zhen hua ; dong jian

..............page:213-216

Second order Impulsive Integro-Differential Equations with a Derivative in Banach Spaces
wang xin feng ; zhang li xin

..............page:217-220