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针对有人/无人战斗机协同空战中的火力分配问题,建立了以目标总存活概率最小和武器消耗数量最少的火力分配多目标优化模型,并提出一种改进的多目标蛙跳算法用于求解问题的Pareto最优解集.该改进算法充分利用混洗蛙跳算法收敛速度快、收敛精度高的算法优势进行全局寻优,利用自适应网格法对非劣解进行维护和更新,并在青蛙种群的全局进化过程中引入Tent混沌变异以避免算法早熟收敛.为便于从求解得到的Pareto最优解集中选择出最优火力分配方案,提出了一种最优火力分配方案的自主选择规则.最后通过仿真实验验证了所提方法的可行性和有效性.实验结果表明,所提方法能有效求解有人/无人战斗机协同空战中的火力分配问题. 相似文献
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《计算机工程与应用》2016,(13):259-264
为提高空战编队协同火力分配模型的准确性,结合空战实际动态过程的特点,提出相对静态空战过程和窗口时间约束概念,并基于此建立相对静态空战火力分配模型,考虑从分配开始到命中目标所需时间与实际可用时间的相互关系;针对模型在增加了时间约束后难以快速准确求解的问题,提出一种时间约束处理的策略,并基于最佳适应度和遗传代数调整策略相结合的自适应量子遗传算法求解。实验结果验证了改进算法的快速收敛性和稳定性,同时表明模型在空战火力分配方面的适用性。 相似文献
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Hopfield神经网络模型在火力分配算法中的应用研究 总被引:3,自引:0,他引:3
该文针对指挥控制系统中的火力分配问题进行了研究,首先介绍了几种传统的分配算法,在介绍了离散Hopfield神经网络模型的基本算法的基础上,将其引入到火力分配问题的求解过程中,文章最后给出了一个应用的实例。 相似文献
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在基本火力规划模型的基础上,建立了一种大规模火力规划问题的递阶模型,并运用大系统的递阶优化算法和动态规划优化算法,提出了一种新的求解该模型的递阶动态规划算法。该方法层次清晰,降低了计算复杂程度,并且适合并行计算,能迅速找到火力规划问题的最优火力分配方案和最优解。仿真算例表明了该方法的实用性。 相似文献
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结合战场目标价值分析,根据防空武器兵力火力分配情况,运用遗传算法建立了火力分配模型,使防空武器最大限度地发挥火力单位效能,达到最大毁伤效果.采用了适应度函数惩罚的方法,对选择,交叉,变异等操作进行了改进.最后通过实例仿真和计算,针对单发和双发两种射击方式分别建立数学模型,运用遗传算法求解得出了火力分配最优方案,验证了方案的可行性和优越性.研究结果为两型防空武器系统的作战应用奠定了基础,为决策提供一定的理论依据. 相似文献
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针对目前采用差分进化算法求解防空导弹火力分配问题需要人工确定惩罚系数,从而增大模型建立复杂性的问题。采用一种处理约束条件的改进差分进化算法求解该问题;该方法在解是否可行的基础上采用三种选择准则用于搜索可行解区域,并增加了一个整数变量用于保存整数解。实例结果表明,与采用惩罚函数的方法相比,该方法在同等的求解效率下,能够获得较好的最优值。由于该方法不用人为确定惩罚系数,减少了模型的确定难度和时间,可用于求解火力分配问题。 相似文献
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《Journal of Process Control》2014,24(7):1098-1105
A random field induced by infinitely many noises emerges in numerous processes, such as a mixed boundary electrochemical deposition process, which is determined by the main reaction and several side reactions. Since the process is controlled on one boundary without knowledge of the side reactions, a model error emerges and the regulation error trails. The model considered in this paper allows for general settings and is defined for white noise and colour noise. The white noise is responsible for unpredictable model errors and the colour noise for systematic errors. A relatively simple boundary control is applied that, when lifted into the domain, acts as a smooth function. The paper demonstrates that the regulation error can be suppressed effectively even if the correlation of random noises is relatively weak. The regulation error is suppressed by the double effects of the Laplacian and noise correlation. The traces of covariance operators are found for several categories of the domain noises and for the boundary noises. A similar trace function in general settings satisfies a Kolmogorov equation in infinitely many state variables. The solution for the Kolmogorov equation is simplified to a form that makes numerical treatment possible. The regulation errors induced by white noise are compared with the errors induced by coloured noise in the numerical analysis. 相似文献
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The premise that the personal computer/spreadsheet explosion will result in the evolution of model management within organizations is explored. The authors use Nolan's stage model of organizational data processing activity as a basis for discussing the nature of change in organizations as local computing capability proliferates. The mainframe era resulted in the recognition of data as a resource and gave rise to data administration. The authors expect that the personal computer era and the accompanying spreadsheet explosion will lead to the recognition of models as a valuable and manageable resource. The role of model administration within organizations is discussed as are software tools for supporting this functional activity. The information resource encyclopedia, an extension of the traditional data dictionary concept, and the model management system are introduced as integral components for supporting model administration. An example is presented to suggest an integrative approach for implementing an MMS in a spreadsheet environment. 相似文献
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Habes DJ 《Applied ergonomics》1984,15(4):297-301
The study was conducted in an automobile upholstery plant which manufactures interior trim panels and seat covers. The job was one which required workers to lean repetitively across a 965 mm (38 in) high flat table-like die while securing sheets of material to the die. Two employees in the embossing department volunteered to participate in a comparative evaluation of the accumulation of low back fatigue from working for a full day using a die with a 914 mm (35 in) maximum reach requirement versus that of a die with a 813 mm (32 in) maximum reach requirement. Electromyography (EMG) of the low back muscles was the measure used for the evaluation. EMG recordings from static muscular contractions were made at selected intervals for an 8 h work day while maintaining normal production. Integrated EMG amplitude and power frequency shifts formed the bases for comparison. The integrated EMG amplitude increase over the course of the day was 47% and 100%, respectively, for the two subjects while working with the 813 mm (32 in) die; the respective EMG amplitude increases for the day while working with the 914 mm (36 in) die were 83% and 263%. None of the power frequency shifts exceeded a predetermined minimum level considered necessary to indicate fatigue. As a result of this study, the plant reduced as much as possible the maximum reach required on every die in the embossing department in order to reduce worke r fatigue. 相似文献
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Enrique Cervera Angel P. Del Pobil Edward Marta Miguel A. Serna 《Journal of Intelligent and Robotic Systems》1996,17(3):283-308
This paper presents a new approach to error detection during motion in contact under uncertainty for robotic manufacturing tasks. In this approach, artificial neural networks are used for perception-based learning. The six force-and-torque signals from the wrist sensor of a robot arm are fed into the network. A self-organizing map is what learns the different contact states in an unsupervised way. The method is intended to work properly in complex real-world manufacturing environments, for which existent approaches based on geometric analytical models may not be feasible, or may be too difficult. It is used for different tasks involving motion in contact, particularly the peg-in-hole insertion task, and complex insertion or extraction operations in a flexible manufacturing system. Several real examples for these cases are presented.Category: (8) AI in Robotics and Manufacturing/FMS. 相似文献
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In modern medicine patients often require multiple drug therapy. Such therapy can be modeled by a physiological flow model using interlinked differential equations to represent the differential rates of delivery and uptake of a drug by organs. Included in the model are the sites of action, toxicity, elimination and drug binding. A menu-driven computer program for this model was developed in FORTRAN 77 for execution on a microcomputer. The program computes the rate of uptake and concentration of drug in key tissues as a function of time. Drug administration can be modeled for bolus injection with up to 10 repeats and/or for continuous infusion of the drug. The drugs warfarin and adriamycin are used as illustrative examples. The program can handle multifactorial problems such as acute and chronic competitive elimination interactions, liver damage, and features of aging such as reduced drug binding and organ function. The computed results can be printed numerically or displayed graphically, either on a screen terminal or as hard copy. The results of several simulations may be cross-plotted for studies involving parametric changes such as would occur in multiple pathology and aging. 相似文献
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《国际计算机数学杂志》2012,89(1):121-132
Many natural and man-made objects have planar and curvilinear surfaces. The images of such curves do not usually have sufficient distinctive features to apply conventional feature-based reconstruction algorithms. In this paper, we describe a method for the reconstruction of various kinds of quadratic curves in 3D space as an intersection of two cones containing the respective projected digitized curve images in the presence of Gaussian noise. The advantage of this method is that it overcomes the correspondence problem that occurs in pairs of projections of the curve. Using nonlinear least-squares curve fitting, the parameters of a curve in 2D digitized image planes are determined. From this we reconstruct the 3D quadratic curve. Relevant mathematical formulations and analytical solutions for obtaining the equation of the reconstructed curve are given. Simulation studies have been conducted to observe the effect of noise on errors in the process of reconstruction. Results for various types of quadratic curves are presented using simulation studies. These are the main contributions of this work. The angle between the reconstructed and the original quadratic curves in 3D space has been used as the criterion for the measurement of the error. The results of this study are useful for the design of a stereo-based imaging system (such as the LBW decision in cricket, the path of a missile, robotic vision, path planning, etc.) and for the best reconstruction with minimum error. 相似文献
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The authors discuss aliasing errors in signature analysis registers for self-testing networks and review analytical results. The results show that when p, the probability that an error will occur at a network output, is close to 1/2, there is a bound of the aliasing error. The analysis uses a graph to represent the probability of transition, the Markov process, and z-transforms to analyze the behavior of the signature analysis register. For very small p(p?0) and very large p(p?1), the aliasing error solution for primitive polynomials is a series of terms (1-?)n in magnitude (where n is the number of random patterns being applied to the network or the length of the network output sequence). As compared with nonprimitive polynomials, whose solution is n(1-?)n or n2(1-?)n, in general primitive polynomials are much better with respect to aliasing. Simulation results are shown for aliasing errors for these polynomials, which give insight as to how aliasing occurs. 相似文献
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Huang-Ming Chang Leonid Ivonin Marta Diaz Andreu Catala Wei Chen Matthias Rauterberg 《Digital Creativity》2013,24(2):154-173
AbstractThe concept of emotion-driven media integrates affective computing into developing new types of digital media by including the human spectator as an essential part of the whole system. Enactive media, as a landmark in this direction, provides a theoretical basis that is rooted in the enactivist approach in cognitive science. Based on this thesis, it is required to establish a practical procedure for developing the media content through integrating psychological approaches. We demonstrate a systematic approach for developing the content for emotion-driven media. The theory of archetypes, one of the psychoanalytical approaches, was applied for editing movie clips as the media content, and coupled the content with emotional responses by using experimental psychological methodologies. The results showed that it is promising to utilise archetypal movie clips as the content of emotion-driven media and archetypal symbolism can be a useful resource for developing the content of media systems. 相似文献
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讨论分布式数据库系统中最小支持度变化时频繁项目集如何高效更新问题,提出了一种基于最小支持度变化的局部频繁项目集的更新算法ULFS和全局频繁项目集的更新算法UGFS.该算法能够充分利用已挖掘的结果.并且产生较少数量的候选频繁项目集,在求解全局频繁项目集过程中.候选局部频繁项目集支持数的通信量为O(n).将文章提出的算法用Java加以实现.并时算法性能进行了研究.实验结果表明这些算法是可行、有效的.并且具有较快的速度. 相似文献
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《Ergonomics》2012,55(10):1130-1147
In Central Europe, the influence of transformation on science and practice in both ergonomics and occupational safety has been positive. The opening of markets has automatically resulted in the quality of products of various countries being compared. The comparison of the state of science has been equally revealing. The spontaneous willingness of leading world centres to co-operate in both occupational safety and ergonomics has resulted in positive changes, e.g. intensive work on creating the instruments for: implementing ILO conventions and EU directives into national laws; implementing international and European standards into national standards; accrediting testing laboratories in the field of occupational safety and ergonomics; accrediting centres for product certification for the safety mark (obligatory) and for conformity with ergonomic parameters (voluntary); and computer-aided designing and creating databases in occupational safety and ergonomics conforming to international standards. These are the laws of the emerging common market for products and services. There is still a much more difficult area of necessary changes in the approach to: the value of life and health; the belief in the possibilities and the effectiveness of initiatives towards changing the working and life environment; and the form and content of the information in occupational safety and ergonomics taught from school to adult education. Transformation has led to a renaissance in which man has become the subject of all aspects of life and activity. There is also a renaissance of occupational safety and ergonomics. The fields of research that have gained importance in this new approach in Central Europe are discussed. 相似文献