Text Knowledge Acquisition Method of Collaborative Product Design Based on Genetic Algorithm by Chongyuan Li, Mengmeng Yang

“…According to the operation process of the genetic algorithm, the chromosomes of clustered text are constructed and encoded and the initial population is obtained. …”
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Hybrid access control algorithm based on relay node assistant in Femtocell network by Cheng-yi LIU, Geng CHEN, Song XING, Lian-feng SHEN

“…A Femtocell hybrid access control algorithm assisted with relay note was proposed to supply higher performance for the Femtocell neighboring users (NUE) in heterogeneous network.Deploying relay outside the Femtocell networks was used and amplify-and-forward (AF) relaying protocol or direct link protocol was alternated to use for the data transmission of Femtocell NUE.An optimization problem was formulated with the constraints of the required transmission rates thresholds of Femtocell registered users (FUE),the thresholds of the cross-tier interferences to the macrocell users (MUE),and total transmit powers of the Femtocell base station (FBS).By using the dual decomposition method,a Femtocell hybrid access control algorithm was given based on the combination of the direct mode and relay mode.Simulation results have shown that the scheme can not only protect the QoS required by the FUE,but also decrease the cross-tier interferences suffered by the MUE.It also illustrates the better performance of the NUE through the dynamic and flexible access mechanism.Furthermore,based on the last simulation the relay link would help the NUE obtain about 25% more performance than the traditional direct link in some regions.…”
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Beam Hopping Beam Optimization and Resource Allocation Algorithm Based on Phased Array by Mengting HAO, Chen ZHANG, Gengxin ZHANG

“…Beam hopping technology can provide enough fl exibility and high resource utilization for satellite communication system, and shows good performance in broadband satellite communication system.However, the existing beam planning scheme of beam hopping technology is relatively fi xed and can not change with the change of service demand characteristics.For the situation of uneven distribution of user demand and scattered location, the advantages of beam hopping technology are diffi cult to play.To solve the above problems, a beam optimization method was proposed, which used the agility characteristics of phased array antenna to adjusted the size of beam according to the characteristics of service distribution, so as to made the service demand in each beam more balanced.On this basis, from the perspective of matching the demand with the actual transmission capacity, the minimization n-order diff erence objective function was established, the time slot resources allocated in each beam were solved by convex optimization algorithm, and the overall satisfaction and system delay of the system before and after beam optimization were compared.The simulation results showed that compared with the traditional beam planning scheme, the algorithm could improved the overall satisfaction of the system, reduced the system delay and improved the access success rate of the users.…”
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Satellite Constellation Orbit Design Optimization with Combined Genetic Algorithm and Semianalytical Approach by Tania Savitri, Youngjoo Kim, Sujang Jo, Hyochoong Bang

“…A global optimization method, Genetic Algorithm (GA), is chosen due to its ability to locate a global optimum solution for nonlinear multiobjective problems. …”
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Resonance Sparse Decomposition Method for Optimizing Quality Factor of Frog Leaping Algorithm by Zengping Kuang, Qingbin Tong, Jing Du, Xiuyong Zhao

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Federated Reinforcement Learning in Stock Trading Execution: The FPPO Algorithm for Information Security by Haogang Feng, Yue Wang, Shida Zhong, Tao Yuan, Zhi Quan

“…This paper presents the Federated Proximal Policy Optimization (FPPO) algorithm, an adaptive trade execution framework that leverages joint reinforcement learning. …”
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Spectrum sensing algorithm based on stochastic resonance and non-central F-distribution by Yuanmeng FAN, Shunlan LIU

“…To solve the problem that the detection probability of the spectrum sensing algorithm is low and the number of samples required for detection is large at low signal-to-noise ratio (SNR), a spectrum sensing algorithm based on stochastic resonance and non-central F-distribution (SRNF) was proposed.By introducing direct-current stochastic resonance noise, the system model of SRNF was established, and the expression of test statistic, false alarm probability and detection probability, and the expression of decision threshold obeying non-central F-distribution were deduced, and the optimal stochastic resonance noise parameter was solved by numerical method.The simulation results show that the detection performance of the proposed SRNF algorithm is better than that of energy detection (ED) algorithm and blind spectrum sensing based on F-distribution (BSF) algorithm at a low SNR.When the false alarm probability is 5%, the SNR is -12 dB, and the number of samples is 200, the detection probability of the proposed algorithm is 95%, which is 34% and 67% higher than BSF algorithm and ED algorithm, respectively.When the SNR is -12 dB, and the detection probability reaches 95%, the number of samples required by the proposed algorithm is 210, which saves 340 samples compared to the BSF algorithm.Furthermore, the proposed algorithm is less affected by noise uncertainty than ED algorithm.…”
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Assembly Quality Inspection of Combine Harvester Based on Whale Algorithm Optimization LSSVM by Sixia Zhao, Yizhen Ma, Mengnan Liu, Xiaoliang Chen, Liyou Xu

“…Aiming at the characteristics of whale optimization algorithm’s weak search ability and easy maturity, this paper introduces the cosine control factor and the sine time-varying adaptive weight to improve it and uses the benchmark function to verify the general adaptability of the algorithm. …”
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Birotor Coaxial Model Estimation using Different Influence Function of Cultural Algorithm by Azegmout Mohamed, Mjahed Mostafa, El Kari Abdeljalil, Ayad Hassan

“…This work investigates the estimation of a coaxial birotor UAV’s model parameters by utilizing four influence function of Cultural Algorithm (CA). The CA is regarded as a strong algorithm that can adapt to a variety of problems. …”
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Calculation of Seven Photovoltaic Cells Parameters Using Parallelized Successive Discretization Algorithm by Adrian M. Deaconu, Daniel T. Cotfas, Petru A. Cotfas

“…The seven parameters of the photovoltaic cell and panels for the two-diode model are determined using a parallelized metaheuristic algorithm based on successive discretization. The parameters obtained for a photovoltaic cell and four panels using the proposed algorithm are compared with the ones calculated through over twenty methods from recent research literature. …”
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Ameliorated Chameleon Algorithm-Based Shape Optimization of Disk Wang–Ball Curves by Yan Liang, Rui Yang, Xianzhi Hu, Gang Hu

Subjects: “…ameliorated chameleon algorithm…”
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Retracted: Intelligent Analysis of Core Identification Based on Intelligent Algorithm of Core Identification by Discrete Dynamics in Nature and Society

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Efficient algorithm for calculating short cycles in Tanner graph based on matrix computation by Qing ZHU, Le-nan WU, Yong-biao YANG, Jie LI, Shi-ming XU

“…Loop distribution of Tanner graph affects the BER performance of low-density parity-check codes(LDPC) decoding.To count short cycles in the Tanner graph efficiently,a side by side recursion algorithm based on matrix computation was proposed.Firstly,5 basic graph structures were defined to realize recursive calculate in the implementation process.Compared with previous works,the algorithm provided many methods for counting the same length of cycles.The same result confirmed the correctness of the algorithm.The new algorithm could not only calculate the total number of cycles,but also gave the number each edge participating in fixed-length cycles.Its complexity was proportional to the product of D and square of N,where D was the average degree of variable nodes,and N denoted the code length.For LDPC codes,D was far less than N.For most of the LDPC codes,the calculation for numbers of cycle-length g、g+2、g+4 was only several seconds.…”
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Vehicular ad hoc network and clustering routing algorithm applied in wilderness scenarios by Mohsen MOHAMED, Kai-kai XU, Wei-wei XIA, Yi WU, Lian-feng SHEN

“…To solve the communication problem among vehicles in wilderness scenarios such as desert and Gobi or between the vehicles and the outside,a special architecture of VANET was proposed and its clustering and routing algorithm was analyzed.Based on different types of communication terminals each vehicle equips and the location,speed and driving direction information of the periodic message,the vehicles are organized into different clusters.The head of each cluster chooses the best route for its members when they ask for inner-clustering communications or inter-clustering communications.It also searches the nearest vehicle which equips satellite communication terminals or land mobile communications terminals to forward messages when a member requests communicating with the outside of the network.Simulation results show that the proposed algorithm has higher network stability,higher data delivery ratio and less routing overhead.…”
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Improved shuffled frog-leaping algorithm based network community detection method by Tong WANG, Xin-lin ZHAO

Subjects: “…shuffled frog-leaping algorithm…”
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Correction algorithm of migration through Doppler cells for space target in bistatic ISAR by Bao-feng GUO, Chao-xuan SHANG, Xin WANG, Jun-tao MA, Jian DONG

“…Aiming at the problem of migration through Doppler cells in bistatic ISAR,based on bistatic ISAR turntable model,the reason of migration through Doppler cells from two aspects of echo model and the relative speed changes of scattered points was analyzed.The correction algorithm was presented based on range cell phase compensation.Firstly,target rotating rate was estimated through the geometrical relationship of bistatic stations and target.Secondly,the algo-rithm divided the echo data into two parts,and then imaging separately,getting two images of different angles of view.And the rotating center was estimated according to the maximum criterion of rotating correlation,which was used to range scaling.The migration through Doppler cells was corrected through phase compensation of each range cell at last.The simulation result show that the method could solve the problem of migration through Doppler cells,and could im-prove the image quality.…”
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RESEARCH ON DYNAMIC PERFORMANCE OF GEAR SYSTEM BASED ON ORTHOGONAL DESIGN AND GENETIC ALGORITHM by WU ZhengWei, WU XunCheng, ZHANG JueCheng

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Retracted: Music Segmentation Algorithm Based on Self-Adaptive Update of Confidence Measure by Journal of Mathematics

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Research on multi-UAV energy consumption optimization algorithm for cellular-connected network by Jingming XIA, Yufeng LIU, Ling TAN

“…In complex time-varying environment, the ground base station (GBS) may not assist the UAV.Therefore, a mobile edge computing (MEC) cellular-connected network based on digital twin (DT) technology was studied.Given the efficiency of multi-UAV, multiple high-altitude balloon (HAB) equipped with MEC servers were introduced.On this basis, an energy minimization problem for all UAV was proposed, and a multi-UAV trajectory optimization and resource allocation scheme was presented to solve it.The double deep Q-network (DDQN) was applied to handle the association between multi-UAV and multi-HAB, and the multi-UAV trajectory and computing resource allocation were jointly optimized by the successive convex approximation (SCA) and the block coordinate descent (BCD).Simulation experiments verify the feasibility and effectiveness of the proposed algorithm.The system energy consumption is reduced by 30%, better than the comparison algorithms.…”
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Research on a routing task planning algorithm for LEO remote sensing constellation by Xing QI, Zhen LIU, Jiahui LIANG, Qiming ZHAO, Chang LIU

Subjects: “…routing task planning algorithm…”
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