基于混合优化策略的拜耳法物料平衡计算

首先分析了氧化铝生产工艺中物料平衡计算的特点,介绍了拜耳法生产工艺流程,并给出了拜耳法物料平衡计算的数学模型,接着针对传统的优化算法存在易陷入局部最优导致的收敛速度慢,精度低等问题,提出以模拟退火—单纯形法作为混合优化策略用于拜耳法物料平衡计算。最终的计算结果表明,混合优化策略有效地避免了原有两种算法的缺陷,具有较强的全局搜索能力和较高的收敛精度,其性能远远优于单一优化方法,是进行拜耳法物料平衡计算的有效方法。     

基于混合迁移策略的生物地理学优化算法

为提高生物地理学优化算法(BBO)的性能,提出一种基于混合迁移策略的生物地理学优化算法(HMBBO)。该算法通过动态选取待迁出种群个体,平衡对解集搜索过程中的选择压力。采用混合迁移策略改进迁移机制,增强算法对解的搜索能力,避免引起过早收敛。并加入分段Logistic混沌机制对个体进行变异,提高算法的收敛精度。基于标准测试函数的仿真实验表明,HMBBO算法可有效避免早熟收敛,在收敛速度和收敛精度上较标准BBO算法有较大提高。     

带记忆功能的混合蛙跳算法

针对基本混合蛙跳算法收敛速度慢、优化精度低的问题、提出了带记忆功能的混合蛙跳算法。引入自适应学习因子,使算法在迭代初期加速收敛并不断拓展新的搜索区域,在迭代后期能够在全局最优邻域进行精细搜索,从而保持了开发与探索的平衡,并提高了收敛精度;采用随机分组策略平衡各子群的寻优能力,维持了种群的多样性。对6个测试函数进行了优化实验,并与基本混合蛙跳算法和相关文献中的改进算法进行比较,结果表明了该算法具有更好的优化性能。     

融合麻雀搜索和随机差分的双向学习平衡优化器算法

针对平衡优化器算法(Equilibrium Optimizer, EO)求解精度低、收敛速度慢等问题，提出一种融合麻雀搜索和随机差分的双向学习平衡优化器算法。首先，给出了基于麻雀搜索算法的自适应种群划分策略，以平衡算法的全局探索和局部勘探，从而提高算法的收敛精度和收敛速度。其次，引入随机差分策略来重建平衡池，增加个体之间的信息交流，以利于算法跳出局部最优。最后，设计了一种双向混沌反向学习策略并将其应用到更新后的种群，以增加种群多样性，从而进一步提高算法的收敛精度。通过14个测试函数进行仿真实验，使用Wilcoxon秩和检验以及平均绝对误差来评价算法性能，并将改进算法应用到两个工程设计问题，实验结果验证了3种改进策略的有效性，且改进算法的收敛精度、收敛速度和鲁棒性都有显著提高。     

求解约束优化问题的改进果蝇优化算法及其工程应用

针对基本果蝇优化算法收敛速度慢、求解精度低、易于陷入局部极值以及算法候选解不能取负值等不足,提出一种用于解决约束优化问题的改进果蝇优化算法.该算法利用果蝇个体历史最佳记忆信息和种群全局历史最佳记忆信息构建多策略混合协同进化的搜索机制,以达到有效平衡算法的全局探索与局部开发的目的,同时也能够较好地避免算法的早熟收敛问题;...     

基于混沌优化策略的SFLA算法

针对基本混合蛙跳算法的缺陷, 提出了一种基于混沌优化策略的改进混合蛙跳算法(SFLA)。在青蛙更新策略中引入自适应扰动机制, 平衡了算法搜索深度, 并利用高斯变异算子代替随机更新操作, 提高了算法搜索速度; 在全局迭代中借鉴混沌优化策略思想, 以概率形式对最优个体进行优化, 避免了族群陷入局部最优, 并证明了改进算法以概率1收敛于全局最优解。最后用MATLAB对测试函数进行了仿真, 仿真结果表明改进的混合蛙跳算法在收敛速度、优化精度上有较大改善。     

多策略融合的改进黏菌算法

针对标准黏菌算法（SMA）存在的容易陷入局部最优解、收敛速度慢以及求解精度低等问题，提出一种多策略融合的改进黏菌算法（MSISMA）。首先，引入布朗运动和莱维飞行机制以增强算法的搜索能力；其次，根据算法进行的不同阶段分别改进黏菌的位置更新公式，以提高算法的收敛速度和收敛精度；然后，应用区间自适应的反向学习（IAOBL）策略生成反向种群，以提升种群的多样性和质量，从而提高算法的收敛速度；最后，引入收敛停滞监测策略，当算法陷入局部最优时，通过对部分黏菌个体的位置重新初始化使算法跳出局部最优。选取23个测试函数，将MSISMA与平衡黏菌算法（ESMA）、黏菌-自适应引导差分进化混合算法（SMA-AGDE）、SMA、海洋捕食者算法（MPA）和平衡优化器（EO）进行测试和比较，并对算法运行结果进行Wilcoxon秩和检验。相较于对比算法，MSISMA在19个测试函数上获得最佳平均值，在12个测试函数上获得最佳标准差，优化精度平均提升23.39%～55.97%。实验结果表明，MSISMA的收敛速度、求解精度和鲁棒性明显较优。     

融合变异策略的自适应蝴蝶优化算法

蝴蝶优化算法是近年来提出的一种新型自然启发式算法。针对基本蝴蝶优化算法收敛速度慢、求解精度低、稳定性差等问题,提出了一种融合变异策略的自适应蝴蝶优化算法。通过引入动态调整转换概率策略,利用迭代次数和个体适应度的变化信息动态调整转换概率,有效维持了算法全局探索与局部搜索的平衡;通过引入自适应惯性权重策略和局部变异策略,利用惯性权重值和混沌记忆权重因子进一步提高了算法的多样性,有效避免算法早熟收敛,同时加快了算法的收敛速度和求解精度。利用改进算法对12个基准测试函数进行仿真实验,与基本蝴蝶优化算法、粒子群算法、樽海鞘群算法、灰狼优化算法等其他算法对比表明,改进算法具有收敛速度快、寻优精度高、稳定性强等优异性能。     

混合蝗虫优化算法求解作业车间调度问题

作为新兴的智能算法，蝗虫优化算法在作业车间调度问题中的应用符合智能制造的趋势。但由于全局寻优能力不足，基本蝗虫优化算法（GOA）在解决作业车间调度问题（JSP）时容易陷入局部最优，导致收敛精度较低。为了克服上述缺陷，利用量子旋转门操作对其进行改进，提出了一种基于量子计算思想的混合蝗虫优化算法（HGOA）。此外，对混合蝗虫优化算法进行了计算复杂度分析与全局收敛性证明，并利用11个作业车间标准测试问题进行了仿真实验。通过与基本蝗虫优化算法（GOA）、鲸鱼优化算法（WOA）、布谷鸟搜索算法（CS）、灰狼优化算法（GWO）的比较发现，混合蝗虫优化算法在平均值、最小值、寻优成功率及迭代次数方面存在较优结果。研究表明，混合蝗虫优化算法具有更强的全局搜索能力，更好的收敛精度，能够有效跳出局部最优。     

具有捕食策略的混合随机优化算法及其多极值函数优化

SAGACIA是一种混合随机优化算法,该算法虽已吸收了模拟退火算法、遗传算法和趋化性算法的优点,但搜索过程中仍存在收敛速度慢以及采用固定步长影响搜索精度的缺点,而捕食搜索策略通过限制的调节能较快锁定最优区域,从而提高收敛速度。结合两者的优缺点,提出一种具有捕食搜索策略的自适应调整步长SAGACIA算法,改进后的算法通过捕食搜索策略平衡了算法的局域搜索和全局搜索,提高了收敛速度;邻域搜索采用自适应步长,避免了最优解附近的震荡,提高了搜索精度。实验仿真结果表明,改进后的SAGACIA算法具有较快的收敛速度和较高的寻优精度,证明了算法改进的有效性和可行性。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。