人工免疫系统中的云决策*

分析了在人工免疫系统中识别器识别抗原的过程中,由于抗原的属性具有不确定性并且抗原空间异常庞大,传统的单一识别模式带来的高伪肯定率和伪否定率的问题。引入了云模型的理论来应对此类问题,用多个识别器联合对抗原进行云决策,达到降低识别的伪肯定率和伪否定率的目的。     

Elitism-based immune genetic algorithm and its application to optimization of complex multi-modal functions

A novel immune genetic algorithm with the elitist selection and elitist crossover was proposed, which is called the immune genetic algorithm with the elitism （IGAE）. In IGAE, the new methods for computing antibody similarity, expected reproduction probability, and clonal selection probability were given. IGAE has three features. The first is that the similarities of two antibodies in structure and quality are all defined in the form of percentage, which helps to describe the similarity of two antibodies more accurately and to reduce the computational burden effectively. The second is that with the elitist selection and elitist crossover strategy IGAE is able to find the globally optimal solution of a given problem. The third is that the formula of expected reproduction probability of antibody can be adjusted through a parameter r, which helps to balance the population diversity and the convergence speed of IGAE so that IGAE can find the globally optimal solution of a given problem more rapidly. Two different complex multi-modal functions were selected to test the validity of IGAE. The experimental results show that IGAE can find the globally maximum/minimum values of the two functions rapidly. The experimental results also confirm that IGAE is of better performance in convergence speed, solution variation behavior, and computational efficiency compared with the canonical genetic algorithm with the elitism and the immune genetic algorithm with the information entropy and elitism.     

Forecasting increasing rate of power consumption based on immune genetic algorithm combined with neural network

Considering the factors affecting the increasing rate of power consumption, the BP neural network structure and the neural network forecasting model of the increasing rate of power consumption were established. Immune genetic algorithm was applied to optimizing the weight from input layer to hidden layer, from hidden layer to output layer, and the threshold value of neuron nodes in hidden and output layers. Finally, training the related data of the increasing rate of power consumption from 1980 to 2000 in China, a nonlinear network model between the increasing rate of power consumption and influencing factors was obtained. The model was adopted to forecasting the increasing rate of power consumption from 2001 to 2005, and the average absolute error ratio of forecasting results is 13.521 8%. Compared with the ordinary neural network optimized by genetic algorithm, the results show that this method has better forecasting accuracy and stability for forecasting the increasing rate of power consumption.     

基于克隆选择原理的故障诊断技术及其应用

借鉴生物免疫系统的克隆选择原理,结合故障诊断的实际应用,研究了既具有故障诊断能力又具有对故障样本的连续学习功能的自适应故障诊断方法．提出了基于克隆选择原理的故障诊断模型,并通过C618型车床齿轮箱的故障诊断实验验证了该方法和模型的有效性．     

混合优化人工免疫网络用于过程动态优化

常见的用于求解过程动态优化的方法局部寻优能力强,易陷入局部点;而优化人工免疫网络虽局部寻优能力弱,但不易陷入局部点.针对这些方法的不足,提出了一种新的算法--混合优化人工免疫网络,将优化人工免疫网络植入局部寻优操作和二次响应机制,应用于Park-Ramirez和Lee-Ramirez生物反应器,此算法能以较少的计算代价搜索到最佳控制策略.将其用于模型参数发生变化的Lee Ramirez生物反应器,实验结果表明,此算法的二次响应机制可以节省85％的评价次数.     

一种基于免疫的监督式分类算法

人工免疫识别系统(AIRS)已被证实为一种高效的分类器,并成功应用于模式识别等领域.然而AIRS存在的记忆细胞数目庞大、分类准确率低等缺陷,限制了进一步的应用.为克服这些缺陷,提出了一种基于免疫的监督式分类算法(AIUC).AIUC首先初始化记忆细胞;然后通过对每一个训练抗原的学习,进行B细胞进化,在B细胞收敛后,优选出最佳的B细胞对记忆细胞进行更新;最后通过记忆细胞对测试数据进行kNN分类.就数据集Iris、Ionosphere、Diabetes和Sonar分别进行的对比实验结果表明,AIUC比AIRS记忆细胞分别减小了5.6%、18%、19.6%和31%,分类准确率提高到98.2%、96.9%、78.3%和92.3%.该算法具有非线性,以及克隆选择、免疫网络和免疫记忆等生物免疫系统特征,可更好地应用于模式识别、异常检测等领域.     

复杂电磁环境下的战场通信保障策略

针对现代战争的特点,研究了战场复杂电磁环境的构成与作用机理;分析了战场复杂电磁环境下通信的特点;提出了构建多层次、多种类的立体通信体系,从最底层入手加强自身的防护与应变能力,充分利用各种手段保证通信畅通的应对策略。     

国防科研试验项目风险管理

界定了国防科研试验项目风险管理的内涵与外延和国防科研试验项目风险管理过程与内容。在此基础上研究了如何对国防科研试验项目潜在的风险进行预测、辨识、分析、处理、监控和实施风险记录。     

基于免疫遗传算法的小水电配电网无功优化

针对目前应用于电力系统无功优化的智能算法所存在的问题,提出将免疫遗传算法应用于电力系统无功优化问题的措施。免疫遗传算法是将免疫理论和基本遗传算法各自的优点相结合,不仅具有遗传算法的搜索特性,还具有免疫算法的多机制求解多目标函数最优解的自适应特性,对"早熟"问题有所改善,收敛于全局最优。最后,以安康市某区域电力系统为例对算法进行了性能测试,提出了合理的调压措施,结果表明将免疫遗传算法应用于电力系统无功优化问题可以显著降低系统网损,改善电压质量。     

基于自适应极限学习机的变压器故障识别方法

针对变压器状态数据累积规模和复杂程度均增大的情况,单一智能算法进行数据处理的能力有限、精度低,提出了基于自适应极限学习机的变压器故障识别方法。利用免疫算法(IA)的多样性调节机制和存储机制对粒子种群进行优、劣分类,对优、劣粒子分别采用不同的进化方式。经IA改进的粒子群优化(PSO)算法有效克服了种群容易早熟从而导致进化停滞的缺点,提高了全局寻优能力。在参数寻优的基础上,根据寻优输出结果建立变压器故障识别模型。实验计算结果表明所提方法比极限学习机(ELM)、粒子群优化极限学习机(PSO-ELM)、遗传算法优化极限学习机(GA-ELM)方法的故障识别精度高。