Design and optimization for wireless-powered IRS-aided mobile edge computing system by Dong TANG, Xuwei HUANG, Zhiwei LUO, Sai ZHAO, Gaofei HUANG

“…A new design of intelligent reflecting surface (IRS)-aided mobile edge computing (MEC) system was studied, which consisted of a hybrid access point (HAP) connected with an MEC server, an IRS equipped with radio-frequency (RF) energy harvesting (EH) circuits, and a user side with random task arrival.To reduce energy consumption at the user, a novel protocol was proposed first, in which the system was enabled to select a proper operation mode among an EH mode, an IRS-aided task offloading mode, and an IRS-inactive task offloading mode.Then, based on the proposed protocol, an optimization problem was formulated, which aimed at minimizing the amount of consumed energy at the user by optimizing the selection of system operation mode and the resource allocation in each mode.Lyapunov optimization framework was employed to solve the problem to achieve a low-complexity and efficient optimization algorithm.Simulation results show that the proposed scheme can save 50% to 90% of energy consumption for the MEC system as compared with the existing baseline schemes.…”
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Free Vibration Response of a Frame Structural Model Controlled by a Nonlinear Active Mass Driver System by Ilaria Venanzi, Filippo Ubertini

“…In this paper, a nonlinear control strategy based on a modified direct velocity feedback algorithm is proposed for handling stroke limits of an active mass driver (AMD) system. …”
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Study on the Power Consumption Characteristic and Energy Conservation Potential of Continuously Variable Transmission by Zhang Pengfei, Zhang Bojun, Dong Xiaowei, Hao Yunzhi

“…Overall efficiency optimization control strategy,clamping force slip rate control algorithm and new electric oil pump are studied to determine the energy conservation potentials. …”
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Vibration Analysis and Optimization of a Rectangular Plate with Flanging Hyperellipse Cutout by Wensheng Wang, Sier Deng, Song Zhang, Da Geng

“…Then, maximization of frequency or the difference of two consecutive frequencies of the rectangular plate is carried out using Multi-island Genetic Algorithm, aiming to achieve the best dynamic characteristics. …”
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Research of methods for evaluating the effectiveness of public relations activities by A. A. Sazonov

“…The author considers the metric of the use value norm used to assess the current level and effectiveness of the company’s communication policy, taking into account the complex of various PR activities. The study gives an algorithm for finding an effective commercial offer in the B2B segment. …”
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Spatial Images Feature Extraction Based on Bayesian Nonlocal Means Filter and Improved Contourlet Transform by Pengcheng Han, Junping Du

“…Experimental results both on standard images and spatial images confirm that the proposed algorithm yields significantly better performance than nonsubsampled wavelet transform, contourlet, and curvelet approaches.…”
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An Improved Grey Model with Time Power and Its Application by Jianming Jiang, Caixia Liu, Yuanguo Yao, Yumu Lu, Wanli Xie, Chong Liu

“…Secondly, the variable coefficient in the whitening equation and the time power are determined by particle swarm optimization algorithm. Two empirical examples are then used to verify the validity of the novel model. …”
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Multi-ray channel modeling for programmable wireless environments in the terahertz band by Wenyu LUO, Hechao LIU

“…Terahertz communication system based on programmable wireless environment allowed programming customization of electromagnetic wave propagation in the most suitable ways for different wireless devices.It could not only improve serious fading,interference and non-line-of-sight problems,but also significantly enhance the security and privacy of the system.The channel modeling of terahertz wireless communication in programmable wireless environment was focused.Firstly,a multi-ray channel model for terahertz-band programmable wireless environment was established based on ray tracing technology as well as the propagation model of line-of-sight and non-line-of-sight.Then,based on the established propagation model,reflection coefficient,the broadband channel capacity under the water-filling power allocation algorithm and the RMS delayed extension were further studied.The simulation and analysis results show that the programmable wireless environment greatly reduces the influence of path loss and multipath fading in terahertz wireless transmission through active interference in electromagnetic wave transmission,improves the transmission capacity of terahertz communication system,which provides a reference for the later design of terahertz communication system,especially indoor terahertz communication system.…”
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Avoidance High-Frequency Chattering Second-Order Sliding Mode Controller Design: Buck Converter in Wind Power System by Yigeng Huangfu, Ruiqing Ma, Abdellatif Miraoui

“…In order to remove the high frequency chattering problem when the traditional sliding mode achieves convergence, the second order sliding mode algorithm is reviewed firstly. Meanwhile, the Buck converter taken as a step-down converter is usually adopted in wind power system, because of its simple structure and good linearity. …”
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Time-Frequency Feature Extraction of HRRP Using AGR and NMF for SAR ATR by Xinzheng Zhang, Zhouyong Liu, Shujun Liu, Guojun Li

“…Features from each of the target HRRPs are extracted via the nonnegative matrix factorization (NMF) algorithm in time-frequency domain represented by adaptive Gaussian representation (AGR). …”
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Aeroelastic Flutter and Sliding Mode Control of Wind Turbine Blade by Lin Chang, Yingjie Yu, Tingrui Liu

“…The results show that a better control effect can be achieved on the premise of the design of the precise parameters of the controller: the proposed sliding mode control algorithm based on LMI can effectively act on the aeroelastic system of the blade, significantly reduce the vibration frequency, and make the aeroelastic system converge to an acceptable static difference in a short time, which proves the effectiveness of sliding mode control in suppressing high-frequency vibration under high wind speed.…”
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A Novel Real-Time Center of Gravity Estimation Method for Wheel Loaders with Front/Rear-Axle-Independent Electric Driving by Zhiyu Yang, Jixin Wang, Yunwu Han

“…The CG estimator is used to estimate the longitudinal tire force using the state-space model and the improved square-root unscented Kalman filter (ISR-UKF) algorithm. The simulation and experimental results indicate that this method is suitable for FREWL dynamics and operational characteristics, and the estimated value of CG basically converges to the reference value. …”
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A Simple Scheme for Belief Propagation Decoding of BCH and RS Codes in Multimedia Transmissions by Marco Baldi, Franco Chiaraluce

“…In this paper, we elaborate a new technique for decoding classic binary and nonbinary codes through the belief propagation algorithm. We focus on RS codes included in the recent CDMA2000 standard, and compare the proposed technique with the adaptive belief propagation approach, that is able to ensure very good performance but with higher complexity. …”
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Septic Lateral Sinus Thrombosis: Sinus Exploration Is Unnecessary by Gautam Bir Singh, Rubeena Arora, Sunil Garg, Deepak Kumar, Shruti Ranjan

“…The algorithm of treatment of septic lateral sinus thrombosis (SLST) has undergone a paradigm shift with the understanding of the natural history of sigmoid sinus thrombosis. …”
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Bandlimited Frequency-Constrained Iterative Methods by Harrison Garrett, David G. Long

“…We find that this iterative method for variable aperture reconstruction is equivalent to solving a bandlimited conjugate gradient descent algorithm.…”
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Time and energy aware virtual network embedding using Bayesian theory analysis by Ying HU, Lei ZHUANG, Hong-chang CHEN, Ding MA

“…Aiming at the energy consumption problem in virtual network embedding,a virtual-network-embedding algorithm was proposed by combining the time and energy aware.Taking the running time during the evaluation of physical nodes and physical paths into account,it considered multiple factors which included the processing time of physical devices,and used probability theory to help analyze the selected probability of each available physical node for a virtual node.During the selection of substrate nodes,the factors of remaining resources,the increment of CPU utilization,the switch state and the amount of extended time of physical nodes were considered.The theory of conditional probability was further used to analyze the importance of available nodes.The factors of the switch state,the amount of extended time and the length of physical paths were also considered.The proposed approach could effectively map the current virtual network request onto a smaller set of nodes and links which are switched on,and also the devices which have less amount of extended time.Experimental results show that the proposed approach has better performance,and can effectively decrease energy consumption comparing with the methods without taking the time factor into consideration.…”
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Feature Extraction Method for Weak Faults Based on Time-Delayed Feedback Mixed Potential Stochastic Resonance by Jiachen Tang, Boqiang Shi, Zhixing Li

“…The article analyzes the effects of the delay term, feedback term, and system parameter on the effect of SR and uses the ant colony algorithm (ACA) to optimize the above parameters. Finally, through simulated and engineering experimental results, it is proved that the proposed method has more advantages than the CBSR method in weak fault feature extraction.…”
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EXPERIMENTAL STUDY ON MILLING SURFACE QUALITY OF TC18 TITANIUM ALLOY by WANG YongXin, ZHANG ChangMing

“…Two prediction models（exponential model and multiple quadratic regression model） were established by using taguchi and optimization module design methods, and multi-objective genetic algorithm and response surface method were respectively used for parameter optimization aiming at improving surface quality and machining efficiency.The results show that: The order of influence of each parameter on the surface roughness is feed f>milling depth a_p>milling width a_e>speed of mainshaft n; The multiple quadratic regression model has higher significance and the surface topography obtained from the combination of response surface optimization parameters is optimal. …”
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Multiagent Routing Simulation with Partial Smart Vehicles Penetration by Bogumił Kamiński, Łukasz Kraiński, Atefeh Mashatan, Paweł Prałat, Przemysław Szufel

“…The smart car routing algorithm proposed in this paper reduced travelling time up to 30%. …”
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On Particle Swarm Optimization for MIMO Channel Estimation by Christopher Knievel, Peter Adam Hoeher

“…Evolutionary algorithms, in particular particle swarm optimization (PSO), have recently received much attention. …”
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