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Application of Bayesian regularized BP neural network model for analysis of aquatic ecological data—A case study of chlorophyll-a prediction in Nanzui water area of Dongting Lake 被引量:5
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作者 XU Min ZENG Guang-ming +3 位作者 XU Xin-yi HUANG Guo-he SUN Wei JIANG Xiao-yun 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2005年第6期946-952,共7页
Bayesian regularized BP neural network(BRBPNN) technique was applied in the chlorophyll-α prediction of Nanzui water area in Dongting Lake. Through BP network interpolation method, the input and output samples of t... Bayesian regularized BP neural network(BRBPNN) technique was applied in the chlorophyll-α prediction of Nanzui water area in Dongting Lake. Through BP network interpolation method, the input and output samples of the network were obtained. After the selection of input variables using stepwise/multiple linear regression method in SPSS i1.0 software, the BRBPNN model was established between chlorophyll-α and environmental parameters, biological parameters. The achieved optimal network structure was 3-11-1 with the correlation coefficients and the mean square errors for the training set and the test set as 0.999 and 0.000?8426, 0.981 and 0.0216 respectively. The sum of square weights between each input neuron and the hidden layer of optimal BRBPNN models of different structures indicated that the effect of individual input parameter on chlorophyll- α declined in the order of alga amount 〉 secchi disc depth(SD) 〉 electrical conductivity (EC). Additionally, it also demonstrated that the contributions of these three factors were the maximal for the change of chlorophyll-α concentration, total phosphorus(TP) and total nitrogen(TN) were the minimal. All the results showed that BRBPNN model was capable of automated regularization parameter selection and thus it may ensure the excellent generation ability and robustness. Thus, this study laid the foundation for the application of BRBPNN model in the analysis of aquatic ecological data(chlorophyll-α prediction) and the explanation about the effective eutrophication treatment measures for Nanzui water area in Dongting Lake. 展开更多
关键词 Dongting Lake CHLOROPHYLL-A Bayesian regularized BP neural network model sum of square weights
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APPROXIMATION CAPABILITIES OF MULTILAYER FEEDFORWARD REGULAR FUZZY NEURAL NETWORKS 被引量:2
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作者 Liu PuyinDept. of Math., National Univ. of Defence Technology,Changsha 410073 Dept. of Math., Beijing Normal Univ.,Beijing 100875. 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2001年第1期45-57,共13页
Four layer feedforward regular fuzzy neural networks are constructed. Universal approximations to some continuous fuzzy functions defined on F 0 (R) n by the four layer fuzzy neural networks are shown. At f... Four layer feedforward regular fuzzy neural networks are constructed. Universal approximations to some continuous fuzzy functions defined on F 0 (R) n by the four layer fuzzy neural networks are shown. At first,multivariate Bernstein polynomials associated with fuzzy valued functions are empolyed to approximate continuous fuzzy valued functions defined on each compact set of R n . Secondly,by introducing cut preserving fuzzy mapping,the equivalent conditions for continuous fuzzy functions that can be arbitrarily closely approximated by regular fuzzy neural networks are shown. Finally a few of sufficient and necessary conditions for characterizing approximation capabilities of regular fuzzy neural networks are obtained. And some concrete fuzzy functions demonstrate our conclusions. 展开更多
关键词 regular fuzzy neural networks CUT preserving fuzzy mappings universal approximators fuzzy valued Bernstein polynomials.
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Bayesian Regularization Neural Networks for Prediction of Austenite Formation Temperatures(A_(c1) and A_(c3)) 被引量:1
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作者 Masoud RAKHSHKHORSHID Sayyed-Amin TEIMOURI SENDESI 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2014年第2期246-251,共6页
A neural network with a feed forward topology and Bayesian regularization training algorithm is used to predict the austenite formation temperatures (At1 and A13) by considering the percentage of alloying elements i... A neural network with a feed forward topology and Bayesian regularization training algorithm is used to predict the austenite formation temperatures (At1 and A13) by considering the percentage of alloying elements in chemical composition of steel. The data base used here involves a large variety of different steel types such as struc- tural steels, stainless steels, rail steels, spring steels, high temperature creep resisting steels and tool steels. Scatter diagrams and mean relative error (MRE) statistical criteria are used to compare the performance of developed neural network with the results of Andrew% empirical equations and a feed forward neural network with "gradient descent with momentum" training algorithm. The results showed that Bayesian regularization neural network has the best performance. Also, due to the satisfactory results of the developed neural network, it was used to investigate the effect of the chemical composition on Ac1 and At3 temperatures. Results are in accordance with materials science theories. 展开更多
关键词 Bayesian regularization neural network STEEL chemical composition Ac1 Ae3
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APPROXIMATION ANALYSES FOR FUZZY VALUED FUNCTIONS IN L_1(μ)-NORM BY REGULAR FUZZY NEURAL NETWORKS 被引量:4
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作者 Liu Puyin (Dept. of System Eng. and Math., National Univ. of Defence Tech., Changsha 410073) 《Journal of Electronics(China)》 2000年第2期132-138,共7页
By defining fuzzy valued simple functions and giving L1(μ) approximations of fuzzy valued integrably bounded functions by such simple functions, the paper analyses by L1(μ)-norm the approximation capability of four-... By defining fuzzy valued simple functions and giving L1(μ) approximations of fuzzy valued integrably bounded functions by such simple functions, the paper analyses by L1(μ)-norm the approximation capability of four-layer feedforward regular fuzzy neural networks to the fuzzy valued integrably bounded function F : Rn → FcO(R). That is, if the transfer functionσ: R→R is non-polynomial and integrable function on each finite interval, F may be innorm approximated by fuzzy valued functions defined as to anydegree of accuracy. Finally some real examples demonstrate the conclusions. 展开更多
关键词 FUZZY VALUED simple function regular FUZZY neural network L1(μ) APPROXIMATION Universal approximator
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Emergence of Group Cooperation in Public Goods Game on Regular Small-World Network
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作者 ZHANG Yingqing FAN Ruguo LUO Ming 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2017年第6期529-534,共6页
The regular small-world network, which contains the properties of small-world network and regular network, has recently received substantial attention and has been applied in researches on 2-person games. However, it ... The regular small-world network, which contains the properties of small-world network and regular network, has recently received substantial attention and has been applied in researches on 2-person games. However, it is a common phenomenon that cooperation always appears as a group behavior. In order to investigate the mechanism of group cooperation, we propose an evolutionary multi-person game model on a regular small-world network based on public goods game theory. Then, to make a comparison of frequency of cooperation among different networks, we carry out simulations on three kinds of networks with the same configuration of average degree: the square lattice, regular small-world network and random regular network. The results of simulation show that the group cooperation will emerge among these three networks when the enhancement factor r exceeds a threshold. Furthermore, time required for full cooperation on regular small-world network is slightly longer than the other networks, which indicates that the compact interactions and random interactions will promote cooperation, while the longer-range links are the obstacles in the emergence of cooperation. In addition, the cooperation would be promoted further by enhancing the random interactions on regular small-world network. 展开更多
关键词 regular small-world network public goods game group cooperation
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Comparison of Synchronization Ability of Four Types of Regular Coupled Networks
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作者 王海侠 陆启韶 石霞 《Communications in Theoretical Physics》 SCIE CAS CSCD 2012年第11期681-685,共5页
We investigate the synchronization ability of four types of regular coupled networks. By introducing the proper error variables and Lyapunov functions, we turn the stability of synchronization manifold into that of nu... We investigate the synchronization ability of four types of regular coupled networks. By introducing the proper error variables and Lyapunov functions, we turn the stability of synchronization manifold into that of null solution of error equations, further, into the negative definiteness of some symmetric matrices, thus we get the sufficient synchronization stability conditions. To test the valid of the results, we take the Chua's circuit as an example. Although the theoretical synchronization thresholds appear to be very conservative, they provide new insights about the influence of topology and scale of networks on synchronization, and that the theoretical results and our numerical simulations are consistent. 展开更多
关键词 SYNCHRONIZATION regular coupled networks Lipschitz condition Lyapunov function
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Effects of internal noise on the spiking regularity of a clustered Hodgkin–Huxley neuronal network
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作者 Xiaojuan Sun 《Theoretical & Applied Mechanics Letters》 CAS 2014年第1期35-40,共6页
Spiking regularity in a clustered Hodgkin–Huxley(HH) neuronal network has been studied in this letter. A stochastic HH neuronal model with channel blocks has been applied as local neuronal model. Effects of the int... Spiking regularity in a clustered Hodgkin–Huxley(HH) neuronal network has been studied in this letter. A stochastic HH neuronal model with channel blocks has been applied as local neuronal model. Effects of the internal channel noise on the spiking regularity are discussed by changing the membrane patch size. We find that when there is no channel blocks in potassium channels, there exist some intermediate membrane patch sizes at which the spiking regularity could reach to a higher level. Spiking regularity increases with the membrane patch size when sodium channels are not blocked. Namely, depending on different channel blocking states, internal channel noise tuned by membrane patch size could have different influence on the spiking regularity of neuronal networks. 展开更多
关键词 spiking regularity internal noise clustered neuronal network Hodgkin–Huxley neuron
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常规公交风险的SEM与Bayesian Network组合评估方法研究 被引量:4
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作者 宗芳 于萍 +1 位作者 吴挺 陈相茹 《交通信息与安全》 CSCD 北大核心 2018年第4期22-28,共7页
常规公交系统具有载客量大、班次多、线路固定等特点,存在多种安全风险隐患。为综合评估常规公交风险,对国内外554条事故数据分析整理,构建了常规公交风险指标体系。建立了常规公交风险评估的结构方程模型,得到常规公交风险因素对事故... 常规公交系统具有载客量大、班次多、线路固定等特点,存在多种安全风险隐患。为综合评估常规公交风险,对国内外554条事故数据分析整理,构建了常规公交风险指标体系。建立了常规公交风险评估的结构方程模型,得到常规公交风险因素对事故的单向拓扑结构。在结构学习的基础上,利用信息熵理论研究风险因素对预测结果可信度的影响权重,从而进行变量筛选。以失火事故为例利用贝叶斯网络模型进行了城市常规公交风险评估参数学习。研究结果表明,失火事故的主要风险因素为油气泄漏、车内外温度均较高等。在风险因素组合作用下失火事故发生概率范围为0.002 1至0.842 9。所建模型预测精度高,验证了方法的科学性和准确性,可用于进行定量化的常规公交风险评估。 展开更多
关键词 风险评估 常规公交 结构方程模型 贝叶斯网络模型 信息熵
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“One Water”理念下南方多雨地区分流制污水管网提升改造思路
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作者 王贤萍 解明利 《净水技术》 2026年第1期109-116,共8页
【目的】本文围绕“改善污水管网质量、提高污水处理厂进水浓度、改善城市水环境”的目标,针对南方多雨地区A城市水环境质量差的现象,分析得出主要问题是污水系统不健康。【方法】同时通过数据分析、水质调查、污水溯源、闭路电视(CCTV... 【目的】本文围绕“改善污水管网质量、提高污水处理厂进水浓度、改善城市水环境”的目标,针对南方多雨地区A城市水环境质量差的现象,分析得出主要问题是污水系统不健康。【方法】同时通过数据分析、水质调查、污水溯源、闭路电视(CCTV)管道内窥检测、水力模型模拟等方法分析了造成问题的主要成因:污水管网整体质量差、雨污混接明显,城市内涝导致涝水进入污水系统,污水管网的良好运维机制尚未建立等。【结果】提出了全域整治、雨污统筹、顶层保障等系统性对策,通过增加污水泵站降低末端污水管道埋深,采用开挖和非开挖修复对市政污水管网进行改造;政府主导改造区块内部污水管网重点进行雨污混接改造,同时按照区块旱季污水入网水质进行不同程度的污水管道修复。同时督查企业自行排查和改造,政府进行事前指导、事中监督、事后验收;改造区块内均考虑雨水立管断接,临河区块构建地表径流通道,从源头上减少雨水进入污水系统。城市更新时,统筹考虑雨水的入渗、调蓄和超标行泄通道的构建;最后,需要从企业污水收费机制、雨污水管网建设管理办法、源网厂河一体化运维机制、数字化平台的常态化污水管网健康诊断等方面建立顶层保障机制。【结论】(1)针对当前错综复杂的污水管网问题,急需建立从顶层设计到技术创新的系统性治理措施,才能从根本上取得成效。(2)污水管网质量的提升,必须考虑城市内涝治理问题。(3)经济下行背景下,建议采用“二八”原则,应用低成本常态化诊断方法,把有限的资金投用到问题最严重区域,强调资金使用绩效。 展开更多
关键词 “One Water”理念 全域整治 雨污统筹管理 常态化污水管网健康诊断 一体化运维
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Fast cross validation for regularized extreme learning machine 被引量:9
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作者 Yongping Zhao Kangkang Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2014年第5期895-900,共6页
A method for fast 1-fold cross validation is proposed for the regularized extreme learning machine (RELM). The computational time of fast l-fold cross validation increases as the fold number decreases, which is oppo... A method for fast 1-fold cross validation is proposed for the regularized extreme learning machine (RELM). The computational time of fast l-fold cross validation increases as the fold number decreases, which is opposite to that of naive 1-fold cross validation. As opposed to naive l-fold cross validation, fast l-fold cross validation takes the advantage in terms of computational time, especially for the large fold number such as l 〉 20. To corroborate the efficacy and feasibility of fast l-fold cross validation, experiments on five benchmark regression data sets are evaluated. 展开更多
关键词 extreme learning machine (ELM) regularization theory cross validation neural networks.
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Distributed Majorization-Minimization for Laplacian Regularized Problems 被引量:1
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作者 Jonathan Tuck David Hallac Stephen Boyd 《IEEE/CAA Journal of Automatica Sinica》 EI CSCD 2019年第1期45-52,共8页
We consider the problem of minimizing a block separable convex function(possibly nondifferentiable, and including constraints) plus Laplacian regularization, a problem that arises in applications including model fitti... We consider the problem of minimizing a block separable convex function(possibly nondifferentiable, and including constraints) plus Laplacian regularization, a problem that arises in applications including model fitting, regularizing stratified models, and multi-period portfolio optimization. We develop a distributed majorization-minimization method for this general problem, and derive a complete, self-contained, general,and simple proof of convergence. Our method is able to scale to very large problems, and we illustrate our approach on two applications, demonstrating its scalability and accuracy. 展开更多
关键词 CONVEX OPTIMIZATION DISTRIBUTED OPTIMIZATION GRAPHICAL networks LAPLACIAN regularization
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Semi-supervised Ladder Networks for Speech Emotion Recognition 被引量:9
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作者 Jian-Hua Tao Jian Huang +2 位作者 Ya Li Zheng Lian Ming-Yue Niu 《International Journal of Automation and computing》 EI CSCD 2019年第4期437-448,共12页
As a major component of speech signal processing, speech emotion recognition has become increasingly essential to understanding human communication. Benefitting from deep learning, many researchers have proposed vario... As a major component of speech signal processing, speech emotion recognition has become increasingly essential to understanding human communication. Benefitting from deep learning, many researchers have proposed various unsupervised models to extract effective emotional features and supervised models to train emotion recognition systems. In this paper, we utilize semi-supervised ladder networks for speech emotion recognition. The model is trained by minimizing the supervised loss and auxiliary unsupervised cost function. The addition of the unsupervised auxiliary task provides powerful discriminative representations of the input features, and is also regarded as the regularization of the emotional supervised task. We also compare the ladder network with other classical autoencoder structures. The experiments were conducted on the interactive emotional dyadic motion capture (IEMOCAP) database, and the results reveal that the proposed methods achieve superior performance with a small number of labelled data and achieves better performance than other methods. 展开更多
关键词 SPEECH EMOTION RECOGNITION the LADDER network SEMI-SUPERVISED learning autoencoder regularIZATION
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On Harmonic and Ev-Degree Molecular Topological Properties of DOX,RTOX and DSL Networks
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作者 Murat Cancan 《Computers, Materials & Continua》 SCIE EI 2019年第6期777-786,共10页
Topological indices enable to gather information for the underlying topology of chemical structures and networks.Novel harmonic indices have been defined recently.All degree based topological indices are defined by us... Topological indices enable to gather information for the underlying topology of chemical structures and networks.Novel harmonic indices have been defined recently.All degree based topological indices are defined by using the classical degree concept.Recently two novel degree concept have been defined in graph theory:ve-degree and evdegree.Ve-degree Zagreb indices have been defined by using ve-degree concept.The prediction power of the ve-degree Zagreb indices is stronger than the classical Zagreb indices.Dominating oxide,silicate and oxygen networks are important network models in view of chemistry,physics and information science.Physical and mathematical properties of dominating oxide,silicate and oxygen networks have been considerably studied in graph theory and network theory.Topological properties of the dominating oxide,silicate and oxygen networks have been intensively investigated for the last few years period.In this study we examined,the first,the fifth harmonic and ev-degree topological indices of dominating oxide(DOX),regular triangulene oxide network(RTOX)and dominating silicate network(DSL). 展开更多
关键词 Dominating oxide network dominating silicate network ev-degree topological indices harmonic indices regular triangulene oxide network
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New Neural Network Response Surface Methods for Reliability Analysis 被引量:18
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作者 REN Yuan BAI Guangchen 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2011年第1期25-31,共7页
This article presents two new kinds of artificial neural network (ANN) response surface methods (RSMs): the ANN RSM based on early stopping technique (ANNRSM-1), and the ANN RSM based on regularization theory ... This article presents two new kinds of artificial neural network (ANN) response surface methods (RSMs): the ANN RSM based on early stopping technique (ANNRSM-1), and the ANN RSM based on regularization theory (ANNRSM-2). The following improvements are made to the conventional ANN RSM (ANNRSM-0): 1) by monitoring the validation error during the training process, ANNRSM-1 determines the early stopping point and the training stopping point, and the weight vector at the early stopping point, which corresponds to the ANN model with the optimal generalization, is finally returned as the training result; 2) according to the regularization theory, ANNRSM-2 modifies the conventional training performance function by adding to it the sum of squares of the network weights, so the network weights are forced to have smaller values while the training error decreases. Tests show that the performance of ANN RSM becomes much better due to the above-mentioned improvements: first, ANNRSM-1 and ANNRSM-2 approximate to the limit state function (LSF) more accurately than ANNRSM-0; second, the estimated failure probabilities given by ANNRSM-1 and ANNRSM-2 have smaller errors than that obtained by ANNRSM-0; third, compared with ANNRSM-0, ANNRSM-1 and ANNRSM-2 require much fewer data samples to achieve stable failure probability results. 展开更多
关键词 neural networks response surface reliability analysis early stopping regularIZATION
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基于无监督蒙特卡洛深度学习框架的向量化地震随机噪声衰减
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作者 陈桂 刘洋 张宓 《地球物理学报》 北大核心 2026年第1期366-382,共17页
地震数据在采集过程中难免受到环境、设备等多种因素的干扰,导致数据中存在随机噪声.有效压制随机噪声、提高信噪比,是保证后续高质量反演与解释的关键.然而,在去噪的同时提高信号保真度仍具挑战.为此,本文提出了一种基于无监督蒙特卡... 地震数据在采集过程中难免受到环境、设备等多种因素的干扰,导致数据中存在随机噪声.有效压制随机噪声、提高信噪比,是保证后续高质量反演与解释的关键.然而,在去噪的同时提高信号保真度仍具挑战.为此,本文提出了一种基于无监督蒙特卡洛深度学习框架与零延迟互相关正则化的地震数据随机噪声衰减方法.该方法首先采用基于边缘镜像填充的滑动窗技术,将原始含噪地震数据分割为重叠小块,并展开为一维向量;然后,构建一维稀疏表征神经网络,利用自监督学习优化策略更新网络参数.网络输入为来自原始含噪数据的一维向量,通过最小化由均方误差项与零延迟互相关正则化项组成的混合目标函数来优化网络输出.此外,利用基于蒙特卡洛理论的向量优选策略进一步加速网络优化;最后,将优化后的网络应用于所有含噪向量,通过重塑并拼接去噪后的向量来获得最终去噪结果.通过模型数据与实际测试的验证,结果表明,本文方法能够有效压制随机噪声并保护信号.与多种方法相比,该方法在去噪性能和信号保护能力方面表现更为优越,且基于蒙特卡洛理论的向量优选策略显著提高了算法效率. 展开更多
关键词 无监督深度学习 Kolmogorov-Arnold神经网络 蒙特卡洛选择策略 零延迟互相关正则化 地震噪声衰减
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Morgan's problem of Boolean control networks 被引量:1
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《Control Theory and Technology》 EI CSCD 2017年第4期316-326,共11页
This paper investigates the Morgan's problem of Boolean control networks. Based on the matrix expression of logical functions, two key steps are proposed to solve the problem. First, the Boolean control network is co... This paper investigates the Morgan's problem of Boolean control networks. Based on the matrix expression of logical functions, two key steps are proposed to solve the problem. First, the Boolean control network is converted into an output- decomposed form by constructing a set of consistent outputfriendly subspaces, and a necessary and sufficient condition for the existence of the consistent output-friendly subspaces is obtained. Secondly, a type of state feedback controllers are designed to solve the Morgan's problem if it is solvable. By solving a set of matrix equations, a necessary and sufficient condition for converting an output-decomposed form to an input-output decomposed form is given, and by verifying the output controllability matrix, the solvability of Morgan's problem is obtained. 展开更多
关键词 Boolean control network Morgan's problem regular subspace y-friendly subspace semi-tensor product ofmatrices
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Dimensional Measurement of Complete-connective Network under the Condition of Particle’s Fission and Growth at a Constant Rate
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作者 JinSong Wang BeiBei Hu 《Journal of Software Engineering and Applications》 2012年第12期42-45,共4页
We construct a complete-connective regular network based on Self-replication Space and the structural principles of cantor set and Koch curve. A new definition of dimension is proposed in the paper, and we also invest... We construct a complete-connective regular network based on Self-replication Space and the structural principles of cantor set and Koch curve. A new definition of dimension is proposed in the paper, and we also investigate a simplified method to calculate the dimension of two regular networks. By the study results, we can get a extension: the formation of Euclidean space may be built by the process of the Big Bang's continuously growing at a constant rate of three times. 展开更多
关键词 particle’s FISSION regular fractals the complete-connective network network dimension
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Using Radial Neural Network to Predict the Ultimate Moment of a Reinforced Concrete Beam Reinforced with Composites
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作者 Santatra Mitsinjo Randrianarisoa Lydie Chantale Andriambahoaka +1 位作者 Herimiah Stelarijao Rakotondranja Andrianary Lala Raminosoa 《Open Journal of Civil Engineering》 CAS 2022年第3期353-369,共17页
This article is intended as a proposal for a numerical model for the prediction of the ultimate moment of a reinforced concrete beam reinforced with composite materials based on neural networks, which are classified i... This article is intended as a proposal for a numerical model for the prediction of the ultimate moment of a reinforced concrete beam reinforced with composite materials based on neural networks, which are classified in the artificial intelligence method. In this work, a RBF network or radial basis function type model was created and tested. The validation of the RBF architecture consists in judging its predictive capacity by using the weights and biases computed during the training, to apply them to another database which did not participate to the training and testing of the model. So, with Bayesian regularization, a maximum error of 0.0813 Tm in absolute value was found between the targets and predicted outputs. The value of the mean square error MSE = 1.1106 * 10<sup>-4</sup> allowed us to quantify and justify the prediction performance of this network. Through this article, RBF network model was justified perform and can be used and exploited by our engineers with a high reliability rate. 展开更多
关键词 Nash-Sutcliffe Criteria Ultimate Limit State Simple Bending BAEL RBF Neural network Bayesian regularization
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Decentralized Semi-Supervised Learning for Stochastic Configuration Networks Based on the Mean Teacher Method
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作者 Kaijing Li Wu Ai 《Journal of Computer and Communications》 2024年第4期247-261,共15页
The aim of this paper is to broaden the application of Stochastic Configuration Network (SCN) in the semi-supervised domain by utilizing common unlabeled data in daily life. It can enhance the classification accuracy ... The aim of this paper is to broaden the application of Stochastic Configuration Network (SCN) in the semi-supervised domain by utilizing common unlabeled data in daily life. It can enhance the classification accuracy of decentralized SCN algorithms while effectively protecting user privacy. To this end, we propose a decentralized semi-supervised learning algorithm for SCN, called DMT-SCN, which introduces teacher and student models by combining the idea of consistency regularization to improve the response speed of model iterations. In order to reduce the possible negative impact of unsupervised data on the model, we purposely change the way of adding noise to the unlabeled data. Simulation results show that the algorithm can effectively utilize unlabeled data to improve the classification accuracy of SCN training and is robust under different ground simulation environments. 展开更多
关键词 Stochastic Neural network Consistency regularization Semi-Supervised Learning Decentralized Learning
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岩土热物参数贝叶斯神经网络预测及敏感性分析
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作者 姚兆明 王晓龙 +3 位作者 王洵 魏航 李鹏辉 方庆 《科技和产业》 2025年第14期55-63,共9页
随着寒区工程的开发,准确得出岩土在冻融状态下的热物参数具有重要意义。鉴于常用BP神经网络预测热物参数误差较大,以120组冻土、融土热物参数为样本,采用贝叶斯正则化方法对预测模型进行改进,建立多输入多输出的BP神经网络,模型的预测... 随着寒区工程的开发,准确得出岩土在冻融状态下的热物参数具有重要意义。鉴于常用BP神经网络预测热物参数误差较大,以120组冻土、融土热物参数为样本,采用贝叶斯正则化方法对预测模型进行改进,建立多输入多输出的BP神经网络,模型的预测精度明显提高。用改进蒙特卡洛法和SHAP解释分别对贝叶斯神经网络和随机森林模型进行敏感性分析。结果表明,冻融状态不改变影响因素的敏感性排序。容积热容量和导热系数在冻融状态下,对含水率、干密度、土质的敏感程度依次降低,导温系数对土质、含水率、干密度的敏感程度依次降低。 展开更多
关键词 热物参数 BP神经网络 贝叶斯正则化 蒙特卡洛 SHAP
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