A kind of single linked lists named aggregative chain is introduced to the algorithm, thus improving the architecture of FP tree. The new FP tree is a one-way tree and only the pointers that point its parent at each n...A kind of single linked lists named aggregative chain is introduced to the algorithm, thus improving the architecture of FP tree. The new FP tree is a one-way tree and only the pointers that point its parent at each node are kept. Route information of different nodes in a same item are compressed into aggregative chains so that the frequent patterns will be produced in aggregative chains without generating node links and conditional pattern bases. An example of Web key words retrieval is given to analyze and verify the frequent pattern algorithm in this paper.展开更多
The sleep mode which works upon low arrival traffic is introduced in IEEE802.16e standard to reduce the power consumption of the mobile access terminal. Due to the rapid growth in the sleep interval in the exponential...The sleep mode which works upon low arrival traffic is introduced in IEEE802.16e standard to reduce the power consumption of the mobile access terminal. Due to the rapid growth in the sleep interval in the exponential growth algorithm prescribed in IEEE802.16e, the power saving efficiency of the mobile access terminal is limited and the average delay time of receiving data frames is prolonged when the arrival rate of data frames is low. To obtain lower power consumption and shorter average delay time, the l...展开更多
In order to improve the efficiency of cloud-based web services,an improved plant growth simulation algorithm scheduling model.This model first used mathematical methods to describe the relationships between cloud-base...In order to improve the efficiency of cloud-based web services,an improved plant growth simulation algorithm scheduling model.This model first used mathematical methods to describe the relationships between cloud-based web services and the constraints of system resources.Then,a light-induced plant growth simulation algorithm was established.The performance of the algorithm was compared through several plant types,and the best plant model was selected as the setting for the system.Experimental results show that when the number of test cloud-based web services reaches 2048,the model being 2.14 times faster than PSO,2.8 times faster than the ant colony algorithm,2.9 times faster than the bee colony algorithm,and a remarkable 8.38 times faster than the genetic algorithm.展开更多
An approach for the integrated optimization of the construction/expansion capacity of high-voltage/ medium-voltage (HV/MV) substations and the configuration of MV radial distribution network was presented using plant ...An approach for the integrated optimization of the construction/expansion capacity of high-voltage/ medium-voltage (HV/MV) substations and the configuration of MV radial distribution network was presented using plant growth simulation algorithm (PGSA). In the optimization process, fixed costs correspondent to the investment in lines and substations and the variable costs associated to the operation of the system were considered under the constraints of branch capacity, substation capacity and bus voltage. The optimization variables considerably reduce the dimension of variables and speed up the process of optimizing. The effectiveness of the proposed approach was tested by a distribution system planning.展开更多
To address the shortcomings of existing fault diagnosis models for aero-engine gas path components,such as weak feature extraction capabilities and low diagnostic accuracy,this study proposes a fault diagnosis model u...To address the shortcomings of existing fault diagnosis models for aero-engine gas path components,such as weak feature extraction capabilities and low diagnostic accuracy,this study proposes a fault diagnosis model underpinned by the Fungal Growth Optimization(FGO)algorithm(FGO-1 DCNN-LSTM).This model integrates a 1D convolutional neural network(1 DCNN)and a long short-term memory network(LSTM).LSTM's strength in extracting temporal features compensates for the limitations of 1 DCNN in processing timeseries data.A split-path convolutional fusion module is introduced into the 1 DCNN,enabling parallel input of sensor data,thus enhancing both the network's extraction capabilities and efficiency.Simultaneously,the FGO algorithm is incorporated to tackle the issue of hyperparameter optimization.To validate the model's performance,training and validation experiments were conducted using the N-CMAPSS dataset,which covers fault data under three typical operating conditions:low-altitude low-velocity,higher-altitude and highervelocity,and high-altitude high-velocity.Experimental results indicate that the FGO-1 DCNNLSTM model attains fault diagnosis accuracies of 90.74%,91.67%,and 94.44%under three operating condition.In comparison with the unoptimized 1 DCNN-LSTM model,its diagnostic accuracy is improved by 2.78%,10.19%,and 3.7%,respectively.The results provide evidence that the FGO-1 DCNN-LSTM model can effectively achieve accurate identification and diagnosis of faults in aero-engine gas path components.展开更多
基金Supported by the Natural Science Foundation ofLiaoning Province (20042020)
摘要A kind of single linked lists named aggregative chain is introduced to the algorithm, thus improving the architecture of FP tree. The new FP tree is a one-way tree and only the pointers that point its parent at each node are kept. Route information of different nodes in a same item are compressed into aggregative chains so that the frequent patterns will be produced in aggregative chains without generating node links and conditional pattern bases. An example of Web key words retrieval is given to analyze and verify the frequent pattern algorithm in this paper.
基金Supported by the Major National Science and Technology Special Project (No. 2010ZX03004-002)
摘要The sleep mode which works upon low arrival traffic is introduced in IEEE802.16e standard to reduce the power consumption of the mobile access terminal. Due to the rapid growth in the sleep interval in the exponential growth algorithm prescribed in IEEE802.16e, the power saving efficiency of the mobile access terminal is limited and the average delay time of receiving data frames is prolonged when the arrival rate of data frames is low. To obtain lower power consumption and shorter average delay time, the l...
基金Shanxi Province Higher Education Science and Technology Innovation Fund Project(2022-676)Shanxi Soft Science Program Research Fund Project(2016041008-6)。
摘要In order to improve the efficiency of cloud-based web services,an improved plant growth simulation algorithm scheduling model.This model first used mathematical methods to describe the relationships between cloud-based web services and the constraints of system resources.Then,a light-induced plant growth simulation algorithm was established.The performance of the algorithm was compared through several plant types,and the best plant model was selected as the setting for the system.Experimental results show that when the number of test cloud-based web services reaches 2048,the model being 2.14 times faster than PSO,2.8 times faster than the ant colony algorithm,2.9 times faster than the bee colony algorithm,and a remarkable 8.38 times faster than the genetic algorithm.
基金the National Natural Science Foundation of China (No. 50747025)the Postdoctoral Science Foundation of China (No. 20060400648)+1 种基金the Scientific Research Foundation for the Returned Overseas Chinese Scholars (No. 2005383)the Shanghai Key Scienceand Technology Research Program (No. 041612012)
摘要An approach for the integrated optimization of the construction/expansion capacity of high-voltage/ medium-voltage (HV/MV) substations and the configuration of MV radial distribution network was presented using plant growth simulation algorithm (PGSA). In the optimization process, fixed costs correspondent to the investment in lines and substations and the variable costs associated to the operation of the system were considered under the constraints of branch capacity, substation capacity and bus voltage. The optimization variables considerably reduce the dimension of variables and speed up the process of optimizing. The effectiveness of the proposed approach was tested by a distribution system planning.
基金supported by the National Natural Science Foundation of China under Grant nos.62301341,62371315 and 62531017the Liaoning Provincial Department of Science and Technology(Applied Basic Research)under Grant nos.2025JH2/101300013the Youth Project of Liaoning Provincial Department of Education under Grant nos.200080762/070。
摘要To address the shortcomings of existing fault diagnosis models for aero-engine gas path components,such as weak feature extraction capabilities and low diagnostic accuracy,this study proposes a fault diagnosis model underpinned by the Fungal Growth Optimization(FGO)algorithm(FGO-1 DCNN-LSTM).This model integrates a 1D convolutional neural network(1 DCNN)and a long short-term memory network(LSTM).LSTM's strength in extracting temporal features compensates for the limitations of 1 DCNN in processing timeseries data.A split-path convolutional fusion module is introduced into the 1 DCNN,enabling parallel input of sensor data,thus enhancing both the network's extraction capabilities and efficiency.Simultaneously,the FGO algorithm is incorporated to tackle the issue of hyperparameter optimization.To validate the model's performance,training and validation experiments were conducted using the N-CMAPSS dataset,which covers fault data under three typical operating conditions:low-altitude low-velocity,higher-altitude and highervelocity,and high-altitude high-velocity.Experimental results indicate that the FGO-1 DCNNLSTM model attains fault diagnosis accuracies of 90.74%,91.67%,and 94.44%under three operating condition.In comparison with the unoptimized 1 DCNN-LSTM model,its diagnostic accuracy is improved by 2.78%,10.19%,and 3.7%,respectively.The results provide evidence that the FGO-1 DCNN-LSTM model can effectively achieve accurate identification and diagnosis of faults in aero-engine gas path components.