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1.
那慧泽 《佳木斯教育学院学报》2012,(6):413+415
线损是电网电能损耗的简称。线损率是线损电量占供电量的百分数,是反映电网规划设计、技术装备和经济运行水平的综合性技术经济指标。为此,首先讨论了运行措施,接着分析了提高功率因数、合理配置变压器、应用计算机技术整理提供实现最优运行方式的选择,最后研究了做好电网及设备的经济运行和加大电网设备技术改造力度。 相似文献
2.
INTRODUCTION An Artificial Neural Network (ANN) is an in-formation-processing paradigm that is inspired by the way biological nervous systems, such as the brain, process information. It is composed of a large number of highly interconnected processing elements (neu-rons) working in unison to solve specific problems. In recent years, neural network has been widely applied in the field of engineering construction as a large dimensional nonlinear dynamic system, because of its support for … 相似文献
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阐述与分析遗传算法的原理与技术特点,并通过在某地区电网的优化规划,仿真结果表明,该算法能够带来较大的经济效益。 相似文献
4.
Neural network and genetic algorithm based global path planning in a static environment 总被引：3，自引：0，他引：3
INTRODUCTION The path planning problem of a mobile robot is to find a safe and efficient path for the robot, given a start location, a goal location and a set of obstacles distributed in a workspace. The robot can go from the start location to the goal location without colliding with any obstacle along the path. In addition to the fundamental problem, we also try to find a way to optimize the plan, say to minimize the time required or distance traveled (Wu et al., 1996; Sadati and Ta-he… 相似文献
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Based on minimum output energy,an improved blind multiuser detection algorithm is proposed by the use of Hopfield neural network.Compared with traditional algorithms,the proposed algorithm does not need the circuit for constraints.The resources are greatly saved and the complexity is reduced as well.The simulation results show that the performance of the improved algorithm is similar to that of the optimal multiuser detection algorithm which is not suitable for the mobile station.Compared with the traditional gradient blind multiuser detection algorithm,the convergence speed of the improved algorithm is quickened. 相似文献
6.
吴敏 《黄冈职业技术学院学报》2004,6(3):59-60
配电网是电力系统的重要组成部分。随着岳阳电网的飞速发展,配电网的结构和运行情况日趋复杂。配电网直接面向用户,设备众多,分布面广,而系统损耗也主要集中在配电环节。因此,研宄岳阳电网的优化运行方法,对提高岳阳电网运行的经济效率具有重大意义。 相似文献
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Aiming at the diversity and nonlinearity of the elevator system control target, an effective group method based on a hybrid
algorithm of genetic algorithm and neural network is presented in this paper. The genetic algorithm is used to search the
weight of the neural network. At the same time, the multi-objective-based evaluation function is adopted, in which there are
three main indicators including the passenger waiting time, car passengers number and the number of stops. Different weights
are given to meet the actual needs. The optimal values of the evaluation function are obtained, and the optimal dispatch control
of the elevator group control system based on neural network is realized. By analyzing the running of the elevator group control
system, all the processes and steps are presented. The validity of the hybrid algorithm is verified by the dynamic imitation
performance. 相似文献
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连续型Hopfield神经网络(CHNN)可用于优化计算,但其会遭遇较复杂的参数辨识问题.为了较好地解决这一问题,将擅长全局搜索的蚁群-粒子群混合算法用于对系统参数的最优化选取.再将此混合算法与CHNN有机结合,更好地解决参数辨识问题,且能有效避免CHNN在应用过程中陷入局部最优解.最后,将理论结果应用于求解TSP问题来验证其有效性. 相似文献
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针对我国电网电能损耗过大,提出在配电网装设无功优化控制以降低线损,提高电能利用率。 相似文献
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文中通过分析多项目网络计划资源综合优化问题,抽象出其数学模型,并用改进遗传算法对其求解,最后通过验证得出改进的遗传算法求解该问题明显优于传统的遗传算法,改进后的算法能在较短的时间内找到一个最优解,具有快速收敛寻优的特点,在求解的效率和解的质量方面都达到了比较好的结果. 相似文献
11.
提出了一种优化的迭代降维算法求解混合交通网络设计问题. 混合(连续/离散) 交通网络设计问题常表示为一个带均衡约束的数学规划问题,上层通过新建路段和改善已有路段来优化网络性能,下层是一个传统的 Wardrop 用户均衡模型. 迭代降维算法的基本思想是降维,先保持一组变量(离散/连续) 不变,交替地对另一组变量(连续/离散) 实现最优化. 以迭代的形式反复求解连续网络设计和离散网络设计问题,直至最后收敛到最优解. 通过一个数值算例对算法的效果进行了验证. 相似文献
12.
High-speed train communication system is a typical high-mobility wireless communication network. Resource allocation problem has a great impact on the system performance. However, conventional resource allocation approaches in cellular network cannot be directly applied to this kind of special communication environment. A multidomain resource allocation strategy was proposed in the orthogonal frequency-division multiple access （OFDMA） of high-speed. By analyzing the effect of Doppler shift, sub-channels, antennas, time slots and power were jointly consid- ered to maximize the energy efficiency under the constraint of total transmission power. For the purpose of reducing the computational complexity, noisy chaotic neural network algorithm was used to solve the above optimization problem. Simulation results showed that the proposed resource allocation method had a better performance than the traditional strategy. 相似文献
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In order to solve three kinds of fuzzy programm model, fuzzy chance-constrained programming mode ng models, i.e. fuzzy expected value and fuzzy dependent-chance programming model, a simultaneous perturbation stochastic approximation algorithm is proposed by integrating neural network with fuzzy simulation. At first, fuzzy simulation is used to generate a set of input-output data. Then a neural network is trained according to the set. Finally, the trained neural network is embedded in simultaneous perturbation stochastic approximation algorithm. Simultaneous perturbation stochastic approximation algorithm is used to search the optimal solution. Two numerical examples are presented to illustrate the effectiveness of the proposed algorithm. 相似文献
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针对Hopfield网络在求解优化问题中学习效率低,收敛速度慢,容易陷入局部最优等缺点和不足,把遗传算法同Hopfield网络结合起来,形成进化神经网络,对网络权值进行优化,并且通过对算法的讨论,说明该算法的有效性。 相似文献
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神经网络是一门新兴的信息处理技术,它可用于优化问题的实时求解,本文针对有界约束LS问题,从数学理论出发设计出一种神经网络模型,能实时处理得到最优解。 相似文献
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针对Hopfield网络在求解优化问题中学习效率低，收敛速度慢，容易陷入局部最优等缺点和不足，把遗传算法同Hopfield网络结合起来，形成进化神经网络，对网络权值进行优化，并且通过对算法的讨论，说明该算法的有效性。 相似文献
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首先构建了一个再制造物流网络.在该网络中,正向物流和逆向物流都是双层结构,所有的设施均有能力限制,再制造产品和新产品都可以用来满足顾客的需求,且假设同类设施可以共同设计成集成设施.在此基础上建立了一个包含6种设施的再制造物流网络设施选址的混合整数非线性规划(MINLP)模型.然后给出了基于枚举的求解算法.用该算法搜索整型变量的可行组合,用线性规划软件解决剩下的子问题.最后,通过一个算例说明了模型和算法的有效性.参数灵敏度分析的结果表明,同类设施的集成可能在一定程度上影响问题的最优解. 相似文献
18.
张荣升刘丽桑邓慧琼李培强郑荣进 《福建工程学院学报》2021,(4):378-384
为提高配电网络中故障区段定位的准确性和高效性,基于馈线终端单元的配电网区段定位的研究,提出了一种在含分布式电源的配电网中用鲸鱼优化算法实现故障区段定位的方法。通过MATLAB对支路矩阵、电源接入情况进行编程,创建含多电源的IEEE33节点的配电网模型,完成配电网故障信息编码方式、开关函数和适应度函数的构造。对发生单点故障、多点故障,以及存在信息畸变的情况下发生故障的定位结果分析,结果表明,提出的鲸鱼算法能实现准确定位,其收敛性、准确性和高效性均优于传统粒子群算法、遗传算法以及最近的蝠鲼觅食算法。 相似文献
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混沌神经网络具有全局搜索能力 ,但其运用至今主要局限于组合优化 .通过对普通 Hopfield优化网络引入混沌噪声退火过程 ,提出了一种用于约束非线性全局优化的混沌退火神经网络 ,它易于实现 ,原理简明 ,应用广泛 .对很复杂的测试函数的数字试验表明 ,该模型能够高效、可靠地搜索到全局最优 ,其性能超过遗传算法 GAMA S 相似文献
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最短路的最优解邻域问题就是在一个网络中找出所有的最优路及满足宽容条件的所有近似最优路从组合优化的观点出发，研究了最短路的最优解邻域及其算法，并进行了算法复杂性分析和实例求解。 相似文献