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Forecasting model of residential load based on general regression neural network and PSO-Bayes least squares support vector machine 被引量:5
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作者 何永秀 何海英 +1 位作者 王跃锦 罗涛 《Journal of Central South University》 SCIE EI CAS 2011年第4期1184-1192,共9页
Firstly,general regression neural network(GRNN) was used for variable selection of key influencing factors of residential load(RL) forecasting.Secondly,the key influencing factors chosen by GRNN were used as the input... Firstly,general regression neural network(GRNN) was used for variable selection of key influencing factors of residential load(RL) forecasting.Secondly,the key influencing factors chosen by GRNN were used as the input and output terminals of urban and rural RL for simulating and learning.In addition,the suitable parameters of final model were obtained through applying the evidence theory to combine the optimization results which were calculated with the PSO method and the Bayes theory.Then,the model of PSO-Bayes least squares support vector machine(PSO-Bayes-LS-SVM) was established.A case study was then provided for the learning and testing.The empirical analysis results show that the mean square errors of urban and rural RL forecast are 0.02% and 0.04%,respectively.At last,taking a specific province RL in China as an example,the forecast results of RL from 2011 to 2015 were obtained. 展开更多
关键词 residential load load forecasting general regression neural network (GRNN) evidence theory PSO-Bayes least squaressupport vector machine
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Optimization of support vector machine power load forecasting model based on data mining and Lyapunov exponents 被引量:7
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作者 牛东晓 王永利 马小勇 《Journal of Central South University》 SCIE EI CAS 2010年第2期406-412,共7页
According to the chaotic and non-linear characters of power load data,the time series matrix is established with the theory of phase-space reconstruction,and then Lyapunov exponents with chaotic time series are comput... According to the chaotic and non-linear characters of power load data,the time series matrix is established with the theory of phase-space reconstruction,and then Lyapunov exponents with chaotic time series are computed to determine the time delay and the embedding dimension.Due to different features of the data,data mining algorithm is conducted to classify the data into different groups.Redundant information is eliminated by the advantage of data mining technology,and the historical loads that have highly similar features with the forecasting day are searched by the system.As a result,the training data can be decreased and the computing speed can also be improved when constructing support vector machine(SVM) model.Then,SVM algorithm is used to predict power load with parameters that get in pretreatment.In order to prove the effectiveness of the new model,the calculation with data mining SVM algorithm is compared with that of single SVM and back propagation network.It can be seen that the new DSVM algorithm effectively improves the forecast accuracy by 0.75%,1.10% and 1.73% compared with SVM for two random dimensions of 11-dimension,14-dimension and BP network,respectively.This indicates that the DSVM gains perfect improvement effect in the short-term power load forecasting. 展开更多
关键词 power load forecasting support vector machine (SVM) Lyapunov exponent data mining embedding dimension feature classification
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On-line forecasting model for zinc output based on self-tuning support vector regression and its application
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作者 胡志坤 桂卫华 彭小奇 《Journal of Central South University of Technology》 2004年第4期461-464,共4页
An on-line forecasting model based on self-tuning support vectors regression for zinc output was put forward to maximize zinc output by adjusting operational parameters in the process of imperial smelting furnace. In ... An on-line forecasting model based on self-tuning support vectors regression for zinc output was put forward to maximize zinc output by adjusting operational parameters in the process of imperial smelting furnace. In this model, the mathematical model of support vector regression was converted into the same format as support vector machine for classification. Then a simplified sequential minimal optimization for classification was applied to train the regression coefficient vector α- α* and threshold b. Sequentially penalty parameter C was tuned dynamically through forecasting result during the training process. Finally, an on-line forecasting algorithm for zinc output was proposed. The simulation result shows that in spite of a relatively small industrial data set, the effective error is less than 10% with a remarkable performance of real time. The model was applied to the optimization operation and fault diagnosis system for imperial smelting furnace. 展开更多
关键词 imperial smelting furnace support vectors regression sequential minimal optimization zinc output on-line forecasting
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Support vector machine forecasting method improved by chaotic particle swarm optimization and its application 被引量:11
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作者 李彦斌 张宁 李存斌 《Journal of Central South University》 SCIE EI CAS 2009年第3期478-481,共4页
By adopting the chaotic searching to improve the global searching performance of the particle swarm optimization (PSO), and using the improved PSO to optimize the key parameters of the support vector machine (SVM) for... By adopting the chaotic searching to improve the global searching performance of the particle swarm optimization (PSO), and using the improved PSO to optimize the key parameters of the support vector machine (SVM) forecasting model, an improved SVM model named CPSO-SVM model was proposed. The new model was applied to predicting the short term load, and the improved effect of the new model was proved. The simulation results of the South China Power Market’s actual data show that the new method can effectively improve the forecast accuracy by 2.23% and 3.87%, respectively, compared with the PSO-SVM and SVM methods. Compared with that of the PSO-SVM and SVM methods, the time cost of the new model is only increased by 3.15 and 4.61 s, respectively, which indicates that the CPSO-SVM model gains significant improved effects. 展开更多
关键词 chaotic searching particle swarm optimization (PSO) support vector machine (SVM) short term load forecast
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Support vector machine based nonlinear model multi-step-ahead optimizing predictive control 被引量:9
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作者 钟伟民 皮道映 孙优贤 《Journal of Central South University of Technology》 EI 2005年第5期591-595,共5页
A support vector machine with guadratic polynomial kernel function based nonlinear model multi-step-ahead optimizing predictive controller was presented. A support vector machine based predictive model was established... A support vector machine with guadratic polynomial kernel function based nonlinear model multi-step-ahead optimizing predictive controller was presented. A support vector machine based predictive model was established by black-box identification. And a quadratic objective function with receding horizon was selected to obtain the controller output. By solving a nonlinear optimization problem with equality constraint of model output and boundary constraint of controller output using Nelder-Mead simplex direct search method, a sub-optimal control law was achieved in feature space. The effect of the controller was demonstrated on a recognized benchmark problem and a continuous-stirred tank reactor. The simulation results show that the multi-step-ahead predictive controller can be well applied to nonlinear system, with better performance in following reference trajectory and disturbance-rejection. 展开更多
关键词 nonlinear model predictive control support vector machine nonlinear system identification kernel function nonlinear optimization
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Robustly stable model predictive control based on parallel support vector machines with linear kernel 被引量:4
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作者 包哲静 钟伟民 +1 位作者 皮道映 孙优贤 《Journal of Central South University of Technology》 EI 2007年第5期701-707,共7页
Robustly stable multi-step-ahead model predictive control (MPC) based on parallel support vector machines (SVMs) with linear kernel was proposed. First, an analytical solution of optimal control laws of parallel SVMs ... Robustly stable multi-step-ahead model predictive control (MPC) based on parallel support vector machines (SVMs) with linear kernel was proposed. First, an analytical solution of optimal control laws of parallel SVMs based MPC was derived, and then the necessary and sufficient stability condition for MPC closed loop was given according to SVM model, and finally a method of judging the discrepancy between SVM model and the actual plant was presented, and consequently the constraint sets, which can guarantee that the stability condition is still robust for model/plant mismatch within some given bounds, were obtained by applying small-gain theorem. Simulation experiments show the proposed stability condition and robust constraint sets can provide a convenient way of adjusting controller parameters to ensure a closed-loop with larger stable margin. 展开更多
关键词 parallel support vector machines model predictive control stability ROBUSTNESS
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Least Squares-support Vector Machine Load Forecasting Approach Optimized by Bacterial Colony Chemotaxis Method 被引量:2
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作者 ZENG Ming LU Chunquan +1 位作者 TIAN Kuo XUE Song 《中国电机工程学报》 EI CSCD 北大核心 2011年第34期I0009-I0009,共1页
During the Twelfth Five-Year plan,large-scale construction of smart grid with safe and stable operation requires a timely and accurate short-term load forecasting method.Moreover,along with the full-scale smart grid c... During the Twelfth Five-Year plan,large-scale construction of smart grid with safe and stable operation requires a timely and accurate short-term load forecasting method.Moreover,along with the full-scale smart grid construction,the power supply mode and consumption mode of the whole system can be optimized through the accurate short-term load forecasting;and the security,stability and cleanness of the system can be guaranteed. 展开更多
关键词 short-term load forecasting hyper-parameters selection bacterial colony chemotaxis(BCC) least squares support vector machine(LS-SVM)
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Support Vector Machine-Based Nonlinear System Modeling and Control 被引量:1
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作者 张浩然 韩正之 +1 位作者 冯瑞 于志强 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2003年第3期53-58,共6页
This paper provides an introduction to a support vector machine, a new kernel-based technique introduced in statistical learning theory and structural risk minimization, then presents a modeling-control framework base... This paper provides an introduction to a support vector machine, a new kernel-based technique introduced in statistical learning theory and structural risk minimization, then presents a modeling-control framework based on SVM. At last a numerical experiment is taken to demonstrate the proposed approach's correctness and effectiveness. 展开更多
关键词 support vector machine Statistical learning theory Nonlinear systems modeling and control.
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Application of signal processing and support vector machine to transverse cracking detection in asphalt pavement 被引量:6
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作者 YANG Qun ZHOU Shi-shi +1 位作者 WANG Ping ZHANG Jun 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第8期2451-2462,共12页
Vibration-based pavement condition(roughness and obvious anomalies)monitoring has been expanding in road engineering.However,the indistinctive transverse cracking has hardly been considered.Therefore,a vehicle-based n... Vibration-based pavement condition(roughness and obvious anomalies)monitoring has been expanding in road engineering.However,the indistinctive transverse cracking has hardly been considered.Therefore,a vehicle-based novel method is proposed for detecting the transverse cracking through signal processing techniques and support vector machine(SVM).The vibration signals of the car traveling on the transverse-cracked and the crack-free sections were subjected to signal processing in time domain,frequency domain and wavelet domain,aiming to find indices that can discriminate vibration signal between the cracked and uncracked section.These indices were used to form 8 SVM models.The model with the highest accuracy and F1-measure was preferred,consisting of features including vehicle speed,range,relative standard deviation,maximum Fourier coefficient,and wavelet coefficient.Therefore,a crack and crack-free classifier was developed.Then its feasibility was investigated by 2292 pavement sections.The detection accuracy and F1-measure are 97.25%and 85.25%,respectively.The cracking detection approach proposed in this paper and the smartphone-based detection method for IRI and other distress may form a comprehensive pavement condition survey system. 展开更多
关键词 asphalt pavement transverse crack detection vehicle vibration support vector machine classification model
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Improved adaptive pruning algorithm for least squares support vector regression 被引量:4
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作者 Runpeng Gao Ye San 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2012年第3期438-444,共7页
As the solutions of the least squares support vector regression machine (LS-SVRM) are not sparse, it leads to slow prediction speed and limits its applications. The defects of the ex- isting adaptive pruning algorit... As the solutions of the least squares support vector regression machine (LS-SVRM) are not sparse, it leads to slow prediction speed and limits its applications. The defects of the ex- isting adaptive pruning algorithm for LS-SVRM are that the training speed is slow, and the generalization performance is not satis- factory, especially for large scale problems. Hence an improved algorithm is proposed. In order to accelerate the training speed, the pruned data point and fast leave-one-out error are employed to validate the temporary model obtained after decremental learning. The novel objective function in the termination condition which in- volves the whole constraints generated by all training data points and three pruning strategies are employed to improve the generali- zation performance. The effectiveness of the proposed algorithm is tested on six benchmark datasets. The sparse LS-SVRM model has a faster training speed and better generalization performance. 展开更多
关键词 least squares support vector regression machine (LS- SVRM) PRUNING leave-one-out (LOO) error incremental learning decremental learning.
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Generalized Predictive Control with Online Least Squares Support Vector Machines 被引量:41
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作者 LI Li-Juan SU Hong-Ye CHU Jian 《自动化学报》 EI CSCD 北大核心 2007年第11期1182-1188,共7页
这份报纸基于能有效地处理非线性的系统的联机最少的广场支持向量机器(LS-SVM ) 建议一个实际概括预兆的控制(GPC ) 算法。在每个采样时期,算法递归地由增加新数据对并且在实时性质上从考虑删除最不重要的修改模型。删除的数据对被 lag... 这份报纸基于能有效地处理非线性的系统的联机最少的广场支持向量机器(LS-SVM ) 建议一个实际概括预兆的控制(GPC ) 算法。在每个采样时期,算法递归地由增加新数据对并且在实时性质上从考虑删除最不重要的修改模型。删除的数据对被 lagrange 的绝对值从最后一个采样时期更多样地决定。当增加新数据对并且删除存在的时,纸给模型参数的递归的算法分别地,一个大矩阵的倒置被避免,存储器能被算法完全控制。非线性的 LS-SVM 模型在每个采样时期在 GPC 算法被使用。抵销过程的 pH 上的概括预兆的控制的实验显示出建议算法的有效性和实物。 展开更多
关键词 普遍预测控制 支持向量机 联机模型 pH补偿过程 模糊控制
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A new support vector machine optimized by improved particle swarm optimization and its application 被引量:3
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作者 李翔 杨尚东 乞建勋 《Journal of Central South University of Technology》 EI 2006年第5期568-572,共5页
A new support vector machine (SVM) optimized by an improved particle swarm optimization (PSO) combined with simulated annealing algorithm (SA) was proposed. By incorporating with the simulated annealing method, ... A new support vector machine (SVM) optimized by an improved particle swarm optimization (PSO) combined with simulated annealing algorithm (SA) was proposed. By incorporating with the simulated annealing method, the global searching capacity of the particle swarm optimization(SAPSO) was enchanced, and the searching capacity of the particle swarm optimization was studied. Then, the improyed particle swarm optimization algorithm was used to optimize the parameters of SVM (c,σ and ε). Based on the operational data provided by a regional power grid in north China, the method was used in the actual short term load forecasting. The results show that compared to the PSO-SVM and the traditional SVM, the average time of the proposed method in the experimental process reduces by 11.6 s and 31.1 s, and the precision of the proposed method increases by 1.24% and 3.18%, respectively. So, the improved method is better than the PSO-SVM and the traditional SVM. 展开更多
关键词 support vector machine particle swarm optimization algorithm short-term load forecasting simulated annealing
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Improved IMM algorithm based on support vector regression for UAV tracking 被引量:4
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作者 ZENG Yuan LU Wenbin +3 位作者 YU Bo TAO Shifei ZHOU Haosu CHEN Yu 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2022年第4期867-876,共10页
With the development of technology, the relevant performance of unmanned aerial vehicles(UAVs) has been greatly improved, and various highly maneuverable UAVs have been developed, which puts forward higher requirement... With the development of technology, the relevant performance of unmanned aerial vehicles(UAVs) has been greatly improved, and various highly maneuverable UAVs have been developed, which puts forward higher requirements on target tracking technology. Strong maneuvering refers to relatively instantaneous and dramatic changes in target acceleration or movement patterns, as well as continuous changes in speed,angle, and acceleration. However, the traditional UAV tracking algorithm model has poor adaptability and large amount of calculation. This paper applies support vector regression(SVR)to the interacting multiple model(IMM) algorithm. The simulation results show that the improved algorithm has higher tracking accuracy for highly maneuverable targets than the original algorithm, and can adjust parameters adaptively, making it more adaptable. 展开更多
关键词 interacting multiple model(IMM)filter constant acceleration(CA) unmanned aerial vehicle(UAV) support vector regression(SVR)
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Improved scheme to accelerate sparse least squares support vector regression
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作者 Yongping Zhao Jianguo Sun 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第2期312-317,共6页
The pruning algorithms for sparse least squares support vector regression machine are common methods, and easily com- prehensible, but the computational burden in the training phase is heavy due to the retraining in p... The pruning algorithms for sparse least squares support vector regression machine are common methods, and easily com- prehensible, but the computational burden in the training phase is heavy due to the retraining in performing the pruning process, which is not favorable for their applications. To this end, an im- proved scheme is proposed to accelerate sparse least squares support vector regression machine. A major advantage of this new scheme is based on the iterative methodology, which uses the previous training results instead of retraining, and its feasibility is strictly verified theoretically. Finally, experiments on bench- mark data sets corroborate a significant saving of the training time with the same number of support vectors and predictive accuracy compared with the original pruning algorithms, and this speedup scheme is also extended to classification problem. 展开更多
关键词 least squares support vector regression machine pruning algorithm iterative methodology classification.
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A Nu-support Vector Regression Based System for Grid Resource Monitoring and Prediction
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作者 HU Liang CHE Xi-Long 《自动化学报》 EI CSCD 北大核心 2010年第1期139-146,共8页
关键词 智能调度系统 建模方法 网格资源 计算方法
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RS-SVM forecasting model and power supply-demand forecast 被引量:4
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作者 杨淑霞 曹原 +1 位作者 刘达 黄陈锋 《Journal of Central South University》 SCIE EI CAS 2011年第6期2074-2079,共6页
A support vector machine (SVM) forecasting model based on rough set (RS) data preprocess was proposed by combining the rough set attribute reduction and the support vector machine regression algorithm, because there a... A support vector machine (SVM) forecasting model based on rough set (RS) data preprocess was proposed by combining the rough set attribute reduction and the support vector machine regression algorithm, because there are strong complementarities between two models. Firstly, the rough set was used to reduce the condition attributes, then to eliminate the attributes that were redundant for the forecast, Secondly, it adopted the minimum condition attributes obtained by reduction and the corresponding original data to re-form a new training sample, which only kept the important attributes affecting the forecast accuracy. Finally, it studied and trained the SVM with the training samples after reduction, inputted the test samples re-formed by the minimum condition attributes and the corresponding original data, and then got the mapping relationship model between condition attributes and forecast variables after testing it. This model was used to forecast the power supply and demand. The results show that the average absolute error rate of power consumption of the whole society and yearly maximum load are 14.21% and 13.23%, respectively, which indicates that the RS-SVM forecast model has a higher degree of accuracy. 展开更多
关键词 rough set (RS) support vector machine (SVM) power supply and demand FORECAST
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Integrated parallel forecasting model based on modified fuzzy time series and SVM 被引量:1
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作者 Yong Shuai Tailiang Song Jianping Wang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2017年第4期766-775,共10页
A dynamic parallel forecasting model is proposed, which is based on the problem of current forecasting models and their combined model. According to the process of the model, the fuzzy C-means clustering algorithm is ... A dynamic parallel forecasting model is proposed, which is based on the problem of current forecasting models and their combined model. According to the process of the model, the fuzzy C-means clustering algorithm is improved in outliers operation and distance in the clusters and among the clusters. Firstly, the input data sets are optimized and their coherence is ensured, the region scale algorithm is modified and non-isometric multi scale region fuzzy time series model is built. At the same time, the particle swarm optimization algorithm about the particle speed, location and inertia weight value is improved, this method is used to optimize the parameters of support vector machine, construct the combined forecast model, build the dynamic parallel forecast model, and calculate the dynamic weight values and regard the product of the weight value and forecast value to be the final forecast values. At last, the example shows the improved forecast model is effective and accurate. 展开更多
关键词 fuzzy C-means clustering fuzzy time series interval partitioning support vector machine particle swarm optimization algorithm parallel forecasting
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Prediction and analysis of chaotic time series on the basis of support vector
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作者 Li Tianliang He Liming Li Haipeng 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2008年第4期806-811,共6页
Based on discussion on the theories of support vector machines (SVM), an one-step prediction model for time series prediction is presented, wherein the chaos theory is incorporated. Chaotic character of the time ser... Based on discussion on the theories of support vector machines (SVM), an one-step prediction model for time series prediction is presented, wherein the chaos theory is incorporated. Chaotic character of the time series is taken into account in the prediction procedure; parameters of reconstruction-detay and embedding-dimension for phase-space reconstruction are calculated in light of mutual-information and false-nearest-neighbor method, respectively. Precision and functionality have been demonstrated by the experimental results on the basis of the prediction of Lorenz chaotic time series. 展开更多
关键词 support vector machines chaotic time series prediction model FUNCTIONALITY
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基于机器学习的30%TBP/煤油-硝酸体系中主要组分的分配比预测研究 被引量:1
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作者 于婷 张音音 +6 位作者 张睿志 金文蕾 罗应婷 朱升峰 何辉 叶国安 龚禾林 《原子能科学技术》 北大核心 2025年第1期14-23,共10页
为最优化后处理过程的实验条件、优化工艺、降低实验成本和时间,并提高后处理流程数学模拟的准确性,本文基于随机森林、支持向量回归和K近邻这3种经典的机器学习算法建立了30%TBP/煤油-硝酸体系中主要组分铀、钚、硝酸的分配比数学模型... 为最优化后处理过程的实验条件、优化工艺、降低实验成本和时间,并提高后处理流程数学模拟的准确性,本文基于随机森林、支持向量回归和K近邻这3种经典的机器学习算法建立了30%TBP/煤油-硝酸体系中主要组分铀、钚、硝酸的分配比数学模型,并基于不同数据集进行了超参数优化和模型训练。通过对模型进行验证和测试,发现采用随机森林算法建立的分配比模型准确度最高,其对铀预测的平均绝对相对误差达7.73%,较传统方法提高了约7%。与传统建模方法相比,机器学习方法建立模型的准确度更高。 展开更多
关键词 分配比数学模型 随机森林 支持向量回归 K近邻
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深埋长大隧道地温预测的机器学习算法对比研究 被引量:1
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作者 周权 罗锋 +1 位作者 柴波 周爱国 《安全与环境工程》 北大核心 2025年第1期137-147,共11页
地热对隧道施工、工程结构及运营安全等均有较大的危害,随着我国基础设施建设布局西移,隧道建设的地质条件愈发复杂,隧道埋深和长度不断增加,隧道施工期高温热害问题频发。针对传统地温预测方法中预测精度不高、数据运用不充分,单一机... 地热对隧道施工、工程结构及运营安全等均有较大的危害,随着我国基础设施建设布局西移,隧道建设的地质条件愈发复杂,隧道埋深和长度不断增加,隧道施工期高温热害问题频发。针对传统地温预测方法中预测精度不高、数据运用不充分,单一机器学习模型解译性差等问题,以A隧道为研究对象,将决策树(decision tree,DT)、支持向量机(support vector machine,SVM)、随机森林(random forest,RF)进行耦合,提出了基于DT-SVM-RF模型的深埋长大隧道地温预测方法。在分析隧道综合测井、地应力及岩石热物理试验、航空物探数据后,选取深度、声波波速等10个影响因子作为模型的输入,采用随机交叉验证和空间交叉验证对模型的鲁棒性、泛化能力进行检验,构建LASSO回归、随机森林、互信息3种回归模型,分析10个影响因子的特征重要性排序。结果表明:在测试集上多元线性回归、支持向量机、人工神经网络和决策树-支持向量机-随机森林(decision tree-support vector machinerandom forest,DT-SVM-RF)模型决定系数(R^(2))分别为0.76、0.91、0.88、0.93,均方误差MSE分别为17.64、6.25、8.46、5.20,DT-SVM-RF模型具有相对更优的预测性能,深度、岩石导温系数、岩石导热系数、最大水平主应力特征较为重要,说明DT-SVM-RF模型能有效地提高地温预测的准确率。研究结果可为类似隧道地温预测提供一种精度更高的可行新思路。 展开更多
关键词 隧道热害 隧道安全 多元线性回归 支持向量机(SVM) 随机森林(RF) 人工神经网络(ANN) 特征选择
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