关键词： 三峡-葛洲坝   联合调度   scheduling问题   packing问题   权重优先  

摘要： 三峡-葛洲坝两坝联合调度综合考虑三峡双线五级船闸(目前升船机尚未启用)和葛洲坝三个船闸,根据两坝之间距离不远的特点,实行联合调度,使这段“黄金水道”尽可能畅通.根据通航约束条件和安全性要求,以及船闸调度“先到先过与重点优先相兼顾”的调度原则,引入了联合调度的数学模型,并给出了逐步最优化算法POA.模型的合理性与算法的有效性在工程中得到验证.

关键词： 数学新课程   算法思想   教育价值  

摘要： 算法已成为高中数学新课程的必修内容,对于中学数学教育来说是一个全新的课题。算法的含义是解决问题的程序和步骤,它具有有穷性、确定性、可行性、通用性等特征,算法由基本操作和三种基本控制结构组成。算法在促进学生知识、技能发展方面,逻辑思维方面,情感、态度、价值观等方面具有教育价值。

关键词： 稳态仿真   非线性优化   活性污泥数学模型  

摘要： 活性污泥数学模型No.1(ASM1)涉及的参数多,而且数学模型是非线性的,求解困难。采用非线性优化的方法仿真ASM1,把仿真结果和基准值做了比较。仿真结果证明非线性优化仿真方法可行。

关键词： 跟踪   基于运动   连续性   数学描述  

摘要： 在跟踪领域,建立一个良好的运动目标描述模型是一种算法是否能取得优异效果的关键性因素之一。针对基于运动的跟踪算法提出了一种新的运动目标描述模型。该模型根据运动的连续性探求出运动过程中出现的各种情况之间联系的数学描述方法,并根据对运动目标的观测结果运用EM算法对模型参数进行实时更新。试验结果表明:该模型对部分遮挡,非刚性变形,目标外观发生改变均不敏感。

关键词： 交通运输规划与管理   城市道路网容量   用户平衡   服务水平  

摘要： 设计了既能体现道路网交通特性,又能综合考虑道路网服务水平、交通的环境影响等隐含因素的城市道路网容量数学模型。以平衡配流算法为基础,设计了模型的求解算法,该算法能快速求解大规模道路网络的容量计算问题,并给出提高道路网容量的方向。

关键词： 数学形态学   图像预处理   噪声滤除   边缘检测   断点连接  

摘要： 介绍数学形态学的四种基本运算在二值和灰度形态学中的描述,分析结构元素的选取方法,探讨数学形态学在图像预处理中的应用。研究利用二值或灰度基本运算,分析数学形态学在图像预处理中噪声滤除、边缘检测以及断点连接方面的技术特点和实现方法。

关键词： SPECTRA   DRUGS  

摘要： The composition of medium-volatility organic compounds extracted from human hair using supercritical fluid extraction (SFE) was determined. The entire extract was trapped from a gas flow in a sorption device at the extractor outlet and thermally desorbed into a gas chromatography-mass spectrometry (GC-MS) instrument. The extracted compounds were identified either by the direct processing of GC-MS data or using the CODA mathematical algorithm. The combination of solventless SFE with the transfer of the entire extract into a GC-MS instrument with the direct analysis of GC-MS data allowed us to determine organic compounds at a level of 3.9 pg/mg hair. The CODA mathematical algorithm for the processing of GC-MS data allowed us to determine compounds at a level of 1.7 pg/mg hair;in the majority of publications, this determination limit was achieved either by selective ion detection or using a GC-MS-MS technique.

关键词： BCK-algebra   fuzzy point   fuzzy n-fold / implicative / positive implicative / commutative ideals  

摘要： This paper is devoted to the foldness theory of implicative ideals in BCK-algebras. We use the fuzzy point concept to give some characterizations of fuzzy n-fold implicative ideals and establish some relationships with various n-fold ideals. We also construct some algorithms for studying the foldness of implicative ideals in BCK-algebras.

关键词： Learning algorithms  

摘要： Numerical linear algebra algorithms use the inherent elegance of matrix formulations and are usually implemented using C/C++ floating point representation. The system implementation is faced with practical constraints because these algorithms usually need to run in real time on fixed point digital signal processors (DSPs) to reduce total hardware costs. Converting the simulation model to fixed point arithmetic and then porting it to a target DSP device is a di. cult and time- consuming process. In this paper, we analyze the conversion process. We transformed selected linear algebra algorithms from floating point to fixed point arithmetic, and compared real-time requirements and performance between the fixed point DSP and floating point DSP algorithm implementations. We also introduce an advanced code optimization and an implementation by DSP-specific, fixed point C code generation. By using the techniques described in the paper, speed can be increased by a factor of up to 10 compared to floating point emulation on fixed point hardware. Copyright c 2007 Zoran Nikoli c et al.

关键词： 小学数学   算法   多样化   教学价值  

摘要： 算法多样化是新课程标准对数学教学提出的新要求。文章探讨了算法多样化的教学价值、实质,及其在数学课堂教学中的应用问题进行了较为详尽的阐述。