工程量清单计价模式中不平衡报价模型研究

根据工程量清单合同条件下的固定单价的特点，以及不平衡报价的基本原理和使用条件，建立了以超额利润最大化为目标函数的线性规划模型，并配以具体的工程实例通过单纯形法求得不平衡报价的最优解。     

对偶方块角形大系统多目标规划有效解的性质

为研究对偶方块角形结构的大系统多目标规划模型有效解的性质,首先给出了这类问题偏有效解及拟有效解的概念,然后讨论了有效解、偏有效解与拟有效解之间的关系．     

An Interval Maximum Entropy Method for Quadratic Programming Problem

1 IntroductionThe maximum entropy method, also calledaggregate function method, is mainly based on theentropy function theory in information science. Ituniformly approximates the primitive function viaconstructing maximum entropy function. Owing tothe favorable properties of the maximum entropyfunction, it is convenient to do theory and algorithmresearch. In recent years, many good results insolving nonlinear programming problems such asmini-max problems, nonlinear ill-posed problems andnonlin…     

目的规划方法及其在结构优化中的应用

研究目的规划的算法,考虑目标的目的值、优先级、权数、解的非负与可行性等多种因素对算法进行了改进,实施非线性优化问题线性化处理和自动进行单纯形法求解。提供的方法可有效的解决结构多目标优化设计问题。通过桁架结构多目标优化的算例证实了方法的有效性,讨论了优化过程参数对设计结果的影响,对工程应用有一定参考价值。     

利用Windows API实现闪屏封面

通过介绍在应用程序中闪屏封面的使用原则和Windows API，及如何在Visual Basic6.0中调用Windows API，详细阐述了利用Windows API实现应用程序闪屏封面的方法，并给出具体的实例。     

油田地面注水系统规划技术研究

油田地面注水系统是油田注水系统的重要组成部分，其规划关系到整个系统的投资和运行成本，对于油田地面注水系统的规划技术进行了研究，采用分级优化的策略，将整个系统的规划问题分解为注水支线管网的规划和注水干线管网的规划两部分，在注水支线管网的规划中，提出了以系统投资和系统可靠性为目标的数学模型，并对模型进行了求解，针对注水干线管网的特点，通过对注水站站址的优选，主干线的走向及干线与支线交点的确定，在满足工艺要求的条件下，实现对注水干线管网的优化，使管线费用达到最少。     

Comparative evaluation of different statistical tools for the prediction of uniaxial compressive strength of rocks

In this study, uniaxial compressive strength (UCS), unit weight (UW), Brazilian tensile strength (BTS), Schmidt hardness (SHH), Shore hardness (SSH), point load index (Is₅₀) and P-wave velocity (V_p) properties were determined. To predict the UCS, simple regression (SRA), multiple regression (MRA), artificial neural network (ANN), adaptive neuro-fuzzy inference system (ANFIS) and genetic expression programming (GEP) have been utilized. The obtained UCS values were compared with the actual UCS values with the help of various graphs. Datasets were modeled using different methods and compared with each other. In the study where the performance indice PI_at was used to determine the best performing method, MRA method is the most successful method with a small difference. It is concluded that the mean PI_at equal to 2.46 for testing dataset suggests the superiority of the MRA, while these values are 2.44, 2.33, and 2.22 for GEP, ANFIS, and ANN techniques, respectively. The results pointed out that the MRA can be used for predicting UCS of rocks with higher capacity in comparison with others. According to the performance index assessment, the weakest model among the nine model is P7, while the most successful models are P2, P9, and P8, respectively.     

"启发、引导式"方法在C++教学中的应用

通过在程序设计教学中启发、引导学生主动积极思考,增强教学效果.     

基于ARM的操作系统中断堆栈分析及实现

嵌入式实时操作系统多任务实现的基础就是系统对中断的处理。首先介绍了多任务实时操作系统的多任务实现原理及 ARM芯片的特点 ,在此基础上以 ARM芯片为例 ,详细分析了在发生中断时如何实现中断现场的保护以及一般嵌入式操作系统的多任务切换过程 ,并列出代码给予说明。