基于神经网络与综合气象因素的短期负荷预测

建立每日96点的负荷预测综合模型.引入人工神经网络(ANN)模型,将人体舒适度和历史负荷数据共同作为人工神经网络的输入,建立人工神经网络(ANN)模型,对浙江某市每日96点负荷进行分段预测.每日96点预测值的平均相对误差绝对值可以达到1.3%以下,达到了短期负荷预测精度要求.     

一种基于遗传算法的极限学习机改进算法研究

针对传统极限学习机（ELM）缺乏有效的训练方法、应用时预测精度不理想这一弱点,提出了一种基于遗传算法（GA）训练极限学习机（GA-ELM）的方法。在该方法中,ELM的输入权值和隐藏层节点阈值映射为GA的染色体向量,GA的适应度函数对应ELM的训练误差;通过GA的遗传操作训练ELM,选出使ELM网络误差最小的输入权值和阈值,从而改善ELM的泛化性能。通过与ELM、I-ELM、OS-ELM、B-ELM4种方法的仿真结果对比,表明遗传算法有效地改善了ELM网络的预测精度和泛化能力。     

Parameter optimization model in electrical discharge machining process

Electrical discharge machining （EDM） process, at present is still an experience process, wherein selected parameters are often far from the optimum, and at the same time selecting optimization parameters is costly and time consuming. In this paper, artificial neural network （ANN） and genetic algorithm （GA） are used together to establish the parameter optimization model. An ANN model which adapts Levenberg-Marquardt algorithm has been set up to represent the relationship between material removal rate （MRR） and input parameters, and GA is used to optimize parameters, so that optimization results are obtained. The model is shown to be effective, and MRR is improved using optimized machining parameters.     

改进的基于遗传算法与FCSS相结合的模糊球壳聚类算法

遗传算法（GA）被广泛地应用在聚类算法中.但是当数据点多时,其计算量大的问题是不容忽视的.针对与遗传算法相结合的FCSS算法中的这一不足,主要通过研究了GA初始化种群的选取方法,对GA-FCSS算法进行了改进.实验数据表明：改进的GA-FCSS算法在收敛速度方面有令人满意的效果.     

基于遗传程序设计的机构创新设计

遗传程序设计（GP）是在遗传算法（GA）的基础上提出的,是一种借鉴生物界自然选择思想和遗传机制的全局随机搜索算法。机构创新设计的目标是产生符合设计要求的新机构,将GP应用于机构构型创新设计中,进行机构创新设计的研究,探讨机构构型设计的新理论与新方法。     

基于遗传算法的灰色预测控制算法在液位控制中的应用研究

针对过程控制中被控对象纯滞后而难于控制的特点,提出了用遗传算法（GA）整定灰色预测PID参数的实现方法和步骤。最后针对具体的液位被控对象进行了仿真研究,仿真结果表明该算法具有较好的控制效果。     

基于遗传算法的BP神经网络在变压器超高频局部放电模式识别中的应用

本文针对BP算法易陷入局部极小、收敛速度慢的缺点,根据遗传算法（Genetic Algorithms．GA）具有全局寻优的特点,将二者结合起来提出了一种混合算法：GA—BP算法,并将该算法成功应用于变压器超高频局部放电模式识别。将变压器油中局部放电超高频测量系统所得到的局部放电的特征量作为输入,分别用BP算法和混合算法进行模式识别。实验结果表明GA—BP算法具有收敛速度快、全局最优的优点．并且这种算法可以推广应用于其他实际系统中。     

利用遗传算法实现项目管理资源优化

遗传算法(GA)是建立在自然选择和群体遗传学机理基础上的随机迭代和进化,具有很强的全局优化搜索能力,而且仅使用所求问题的目标函数就可得到下一步的有关搜索信息,由于遗传算法的基本思想简单,运行方式和实现步骤规范,便于编程。利用遗传算法可以实现资源优化取得很好效果。     

利用遗传算法优化神经网络超参数（英文）

目的:证明超参数优化对深度能量方法(DEM)精度的影响以及DEM在预测不同荷载作用下梁和板等结构的应力分布方面的能力。创新点:1.为了提高DEM的准确性,各种超参数组合被输入遗传算法(GA)并找到最佳组合。2.为了防止重复计算以及提高这种元启发式算法的效率,GA过程中还考虑了超参数组合的禁忌列表。方法:1.实施非均匀有理样条(NURBS)以生成穿过结构体和边界的积分点。2.采用DEM计算位移和应力分布。3.利用遗传算法优化DEM的超参数,以对模型在预测结构内应力和位移传播的准确性方面具有显着影响。结论:1.在不同的优化器和激活函数中,Adam和L-BFGS-B方法以及Re LU2函数的组合使得DEM模型的准确率最高。2.其他对模型预测准确性有影响的超参数包括隐藏层的数量、每层神经元的数量以及通过上述结构集成的点数。3.优化DEM的超参数可以使相对应变能误差降低近50%,提高了DEM模型对应力和位移分布的预测能力。     

基于神经网络的模拟电路故障诊断研究

对BP型ANN网络用于模拟电路故障诊断的特点进行了介绍,探讨了利用遗传算法确定BP型ANN网络参数的方法,并给出了遗传算法与BP型ANN相结合实现模拟电路故障诊断的应用.实践表明,该方法的诊断精度、诊断速度以及建立诊断模型的自动化程度都有了较大的提高．     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.     

团图为数的图中的闭团贯数

Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.