We introduce the artificial fish swarm algorithm for heading motion model identification and control parameter optimization problems for the“Ocean Rambler”unmanned wave glider(UWG).First,under certain assumptions,th...We introduce the artificial fish swarm algorithm for heading motion model identification and control parameter optimization problems for the“Ocean Rambler”unmanned wave glider(UWG).First,under certain assumptions,the rigid-flexible multi-body system of the UWG was simplified as a rigid system composed of“thruster+float body”,based on which a planar motion model of the UWG was established.Second,we obtained the model parameters using an empirical method combined with parameter identification,which means that some parameters were estimated by the empirical method.In view of the specificity and importance of the heading control,heading model parameters were identified through the artificial fish swarm algorithm based on tank test data,so that we could take full advantage of the limited trial data to factually describe the dynamic characteristics of the system.Based on the established heading motion model,parameters of the heading S-surface controller were optimized using the artificial fish swarm algorithm.Heading motion comparison and maritime control experiments of the“Ocean Rambler”UWG were completed.Tank test results show high precision of heading motion prediction including heading angle and yawing angular velocity.The UWG shows good control performance in tank tests and sea trials.The efficiency of the proposed method is verified.展开更多
Sentiment analysis or opinion mining(OM)concepts become familiar due to advances in networking technologies and social media.Recently,massive amount of text has been generated over Internet daily which makes the patte...Sentiment analysis or opinion mining(OM)concepts become familiar due to advances in networking technologies and social media.Recently,massive amount of text has been generated over Internet daily which makes the pattern recognition and decision making process difficult.Since OM find useful in business sectors to improve the quality of the product as well as services,machine learning(ML)and deep learning(DL)models can be considered into account.Besides,the hyperparameters involved in the DL models necessitate proper adjustment process to boost the classification process.Therefore,in this paper,a new Artificial Fish Swarm Optimization with Bidirectional Long Short Term Memory(AFSO-BLSTM)model has been developed for OM process.The major intention of the AFSO-BLSTM model is to effectively mine the opinions present in the textual data.In addition,the AFSO-BLSTM model undergoes pre-processing and TF-IFD based feature extraction process.Besides,BLSTM model is employed for the effectual detection and classification of opinions.Finally,the AFSO algorithm is utilized for effective hyperparameter adjustment process of the BLSTM model,shows the novelty of the work.A complete simulation study of the AFSO-BLSTM model is validated using benchmark dataset and the obtained experimental values revealed the high potential of the AFSO-BLSTM model on mining opinions.展开更多
The main objective of the present study is the development of a new algorithm that can adapt to complex and changeable environments.An artificial fish swarm algorithm is developed which relies on a wireless sensor net...The main objective of the present study is the development of a new algorithm that can adapt to complex and changeable environments.An artificial fish swarm algorithm is developed which relies on a wireless sensor network(WSN)in a hydrodynamic background.The nodes of this algorithm are viscous fluids and artificial fish,while related‘events’are directly connected to the food available in the related virtual environment.The results show that the total processing time of the data by the source node is 6.661 ms,of which the processing time of crosstalk data is 3.789 ms,accounting for 56.89%.The total processing time of the data by the relay node is 15.492 ms,of which the system scheduling and the Carrier Sense Multiple Access(CSMA)rollback time of the forwarding is 8.922 ms,accounting for 57.59%.The total time for the data processing of the receiving node is 11.835 ms,of which the processing time of crosstalk data is 3.791 ms,accounting for 32.02%;the serial data processing time is 4.542 ms,accounting for 38.36%.Crosstalk packets occupy a certain amount of system overhead in the internal communication of nodes,which is one of the causes of node-level congestion.We show that optimizing the crosstalk phenomenon can alleviate the internal congestion of nodes to some extent.展开更多
为了提高人工鱼群算法AFSA(artificial fish swarm algorithm)的全局搜索能力及加快其收敛速度,提出一种将其与免疫算法IA(immune algorithm)进行结合的新方法,形成了免疫人工鱼群算法IAFSA(immuneartificial fish swarm algorithm),并...为了提高人工鱼群算法AFSA(artificial fish swarm algorithm)的全局搜索能力及加快其收敛速度,提出一种将其与免疫算法IA(immune algorithm)进行结合的新方法,形成了免疫人工鱼群算法IAFSA(immuneartificial fish swarm algorithm),并且利用该算法自动选取径向基函数RBF(radial basis function)神经网络中的输入变量,以及对网络中隐含层到输出层之间的权值进行训练,从而减少了RBF神经网络的工作量,提高了训练速度。用优化后的RBF神经网络进行短期负荷预测,结果表明,该方法具有较高的预测精度。展开更多
特征选择是网络入侵检测研究中的核心问题,为了提高网络入侵检测率,提出一种人工鱼群算法(AFSA)和支持向量机(SVM)相融合的网络入侵检测模型(AFSA-SVM)。将网络特征子集编码成人工鱼的位置,以5折交叉验证SVM训练模型检测率作为特征子集...特征选择是网络入侵检测研究中的核心问题,为了提高网络入侵检测率,提出一种人工鱼群算法(AFSA)和支持向量机(SVM)相融合的网络入侵检测模型(AFSA-SVM)。将网络特征子集编码成人工鱼的位置,以5折交叉验证SVM训练模型检测率作为特征子集优劣的评价标准,通过模拟鱼群的觅食、聚群及追尾行为找到最优特征子集,SVM根据最优特征子集进行网络入侵检测,并采用KDD CUP 99数据集进行仿真测试。仿真结果表明,相对于粒子群优化算法、遗传算法和原始特征法,AFSA-SVM提高了入侵检测效率和检测率,是一种有效的网络入侵检测模型。展开更多
针对目前振动筛筛分性能差及筛分理论不完善,亟待建立筛机参数与筛分效率间综合数学模型来指导振动筛的设计.基于离散单元法(Discrete Element Method,DEM)的筛分仿真实验解决筛分过程的复杂性和筛分数据难获得等问题,用可调参数的振动...针对目前振动筛筛分性能差及筛分理论不完善,亟待建立筛机参数与筛分效率间综合数学模型来指导振动筛的设计.基于离散单元法(Discrete Element Method,DEM)的筛分仿真实验解决筛分过程的复杂性和筛分数据难获得等问题,用可调参数的振动筛对仿真实验进行验证.筛分效率与筛分参数之间的数学关系是一个复杂的非线性问题,由于传统的回归算法对筛分数学模型预测精度低,利用能有效解决小样本问题和基于统计学理论的简单多核支持向量机(Simple Multiple Kernel Learning,SimpleMKL)对仿真实验获得的数据建立回归模型.但其模型是多极值且不可微分的多参数大规模计算问题,借用鲁棒性强和全局收敛性好的人工鱼群优化算法(Artificial Fish Swarm Algorithm,AFSA)对由SimpleMKL建立的筛分回归模型进行参数寻优,得出筛机振动和结构参数:振幅为2.5mm,振动频率为22Hz,振动方向角为50°,筛孔大小为0.9mm,筛丝直径为0.4mm,筛面倾角为21.6°.提高了振动筛的筛分效率,为振动筛的设计和制造提供了新思路.展开更多
基金Project(51779052)supported by the National Natural Science Foundation of ChinaProject(QC2016062)supported by the Natural Science Foundation of Heilongjiang Province,China+2 种基金Project(614221503091701)supported by the Research Fund from Science and Technology on Underwater Vehicle Laboratory,ChinaProject(LBH-Q17046)supported by the Heilongjiang Postdoctoral Funds for Scientific Research Initiation,ChinaProject(HEUCFP201741)supported by the Fundamental Research Funds for the Central Universities,China
文摘We introduce the artificial fish swarm algorithm for heading motion model identification and control parameter optimization problems for the“Ocean Rambler”unmanned wave glider(UWG).First,under certain assumptions,the rigid-flexible multi-body system of the UWG was simplified as a rigid system composed of“thruster+float body”,based on which a planar motion model of the UWG was established.Second,we obtained the model parameters using an empirical method combined with parameter identification,which means that some parameters were estimated by the empirical method.In view of the specificity and importance of the heading control,heading model parameters were identified through the artificial fish swarm algorithm based on tank test data,so that we could take full advantage of the limited trial data to factually describe the dynamic characteristics of the system.Based on the established heading motion model,parameters of the heading S-surface controller were optimized using the artificial fish swarm algorithm.Heading motion comparison and maritime control experiments of the“Ocean Rambler”UWG were completed.Tank test results show high precision of heading motion prediction including heading angle and yawing angular velocity.The UWG shows good control performance in tank tests and sea trials.The efficiency of the proposed method is verified.
基金The authors extend their appreciation to the Deanship of Scientific Research at King Khalid University for funding this work under grant number(RGP 2/142/43).
文摘Sentiment analysis or opinion mining(OM)concepts become familiar due to advances in networking technologies and social media.Recently,massive amount of text has been generated over Internet daily which makes the pattern recognition and decision making process difficult.Since OM find useful in business sectors to improve the quality of the product as well as services,machine learning(ML)and deep learning(DL)models can be considered into account.Besides,the hyperparameters involved in the DL models necessitate proper adjustment process to boost the classification process.Therefore,in this paper,a new Artificial Fish Swarm Optimization with Bidirectional Long Short Term Memory(AFSO-BLSTM)model has been developed for OM process.The major intention of the AFSO-BLSTM model is to effectively mine the opinions present in the textual data.In addition,the AFSO-BLSTM model undergoes pre-processing and TF-IFD based feature extraction process.Besides,BLSTM model is employed for the effectual detection and classification of opinions.Finally,the AFSO algorithm is utilized for effective hyperparameter adjustment process of the BLSTM model,shows the novelty of the work.A complete simulation study of the AFSO-BLSTM model is validated using benchmark dataset and the obtained experimental values revealed the high potential of the AFSO-BLSTM model on mining opinions.
基金financially supported by Natural Science Foundation of Heilongjiang Province of China[Grant No.LH2019F042].
文摘The main objective of the present study is the development of a new algorithm that can adapt to complex and changeable environments.An artificial fish swarm algorithm is developed which relies on a wireless sensor network(WSN)in a hydrodynamic background.The nodes of this algorithm are viscous fluids and artificial fish,while related‘events’are directly connected to the food available in the related virtual environment.The results show that the total processing time of the data by the source node is 6.661 ms,of which the processing time of crosstalk data is 3.789 ms,accounting for 56.89%.The total processing time of the data by the relay node is 15.492 ms,of which the system scheduling and the Carrier Sense Multiple Access(CSMA)rollback time of the forwarding is 8.922 ms,accounting for 57.59%.The total time for the data processing of the receiving node is 11.835 ms,of which the processing time of crosstalk data is 3.791 ms,accounting for 32.02%;the serial data processing time is 4.542 ms,accounting for 38.36%.Crosstalk packets occupy a certain amount of system overhead in the internal communication of nodes,which is one of the causes of node-level congestion.We show that optimizing the crosstalk phenomenon can alleviate the internal congestion of nodes to some extent.
文摘为了提高人工鱼群算法AFSA(artificial fish swarm algorithm)的全局搜索能力及加快其收敛速度,提出一种将其与免疫算法IA(immune algorithm)进行结合的新方法,形成了免疫人工鱼群算法IAFSA(immuneartificial fish swarm algorithm),并且利用该算法自动选取径向基函数RBF(radial basis function)神经网络中的输入变量,以及对网络中隐含层到输出层之间的权值进行训练,从而减少了RBF神经网络的工作量,提高了训练速度。用优化后的RBF神经网络进行短期负荷预测,结果表明,该方法具有较高的预测精度。
文摘特征选择是网络入侵检测研究中的核心问题,为了提高网络入侵检测率,提出一种人工鱼群算法(AFSA)和支持向量机(SVM)相融合的网络入侵检测模型(AFSA-SVM)。将网络特征子集编码成人工鱼的位置,以5折交叉验证SVM训练模型检测率作为特征子集优劣的评价标准,通过模拟鱼群的觅食、聚群及追尾行为找到最优特征子集,SVM根据最优特征子集进行网络入侵检测,并采用KDD CUP 99数据集进行仿真测试。仿真结果表明,相对于粒子群优化算法、遗传算法和原始特征法,AFSA-SVM提高了入侵检测效率和检测率,是一种有效的网络入侵检测模型。
文摘针对目前振动筛筛分性能差及筛分理论不完善,亟待建立筛机参数与筛分效率间综合数学模型来指导振动筛的设计.基于离散单元法(Discrete Element Method,DEM)的筛分仿真实验解决筛分过程的复杂性和筛分数据难获得等问题,用可调参数的振动筛对仿真实验进行验证.筛分效率与筛分参数之间的数学关系是一个复杂的非线性问题,由于传统的回归算法对筛分数学模型预测精度低,利用能有效解决小样本问题和基于统计学理论的简单多核支持向量机(Simple Multiple Kernel Learning,SimpleMKL)对仿真实验获得的数据建立回归模型.但其模型是多极值且不可微分的多参数大规模计算问题,借用鲁棒性强和全局收敛性好的人工鱼群优化算法(Artificial Fish Swarm Algorithm,AFSA)对由SimpleMKL建立的筛分回归模型进行参数寻优,得出筛机振动和结构参数:振幅为2.5mm,振动频率为22Hz,振动方向角为50°,筛孔大小为0.9mm,筛丝直径为0.4mm,筛面倾角为21.6°.提高了振动筛的筛分效率,为振动筛的设计和制造提供了新思路.
