Modal Parameters Identification Method Based on Symplectic Geometry Model Decomposition by Hang Jin, Jianhui Lin, Xieqi Chen, Cai Yi

“…This paper proposes a novel method of structural system modal identification, where the iterative method is introduced in symplectic geometric model decomposition (SGMD). …”
Get full text

A new efficient genetic algorithm-Taguchi-based approach for multi-period inventory routing problem by Amin Farahbakhsh, Amir Saman Kheirkhah

“…The algorithm parameters, including crossover and mutation rates, population size, number of iterations, and selection pressure, are fine-tuned using the Taguchi method. …”
Get full text

Tradeoff Analysis for Optimal Multiobjective Inventory Model by Longsheng Cheng, Ching-Shih Tsou, Ming-Chang Lee, Li-Hua Huang, Dingwei Song, Wei-Shan Teng

“…Visualization of the tradeoffs displayed by the scatterplots justifies the computation effort done in the experiment, although several iterations needed to reach a nondominated solution make the solution procedure lengthy and tedious. …”
Get full text

Improved Shape-Finding Method and Parametric Study for Designing Asymmetric Suspension Bridges in Mountainous Terrain by Chenchen Jiang, Yangxun Ou, Weiyu Tang, Shengjun Hou, Rui Luo, Yuhao Jin, Bin Sun

“…To address this gap, based on a real-world suspension bridge with a main span length of 700 m, this paper first presents an improved shape-finding method that can fully consider the components of hanger forces in each construction step. In the iterative process, the shape of the cable is determined based on the equilibrium equations, and the hanger forces are calculated through the nonlinear finite element analysis. …”
Get full text

Nonlinear Aeroelastic Oscillations in the Wall of a Flat Channel Filled with Viscous Gas and Resting on a Vibrating Foundation by V. S. Popov, A. A. Popova

“…Using the method of iterations, the law of viscous gas pressure distribution in the channel was determined, and the equation of aeroelastic oscillations in the channel wall was obtained as a generalization of the Duffing equation. …”
Get full text

Digital Rebirth of Dongba Pattern: An Improved Active Contour Model for Pattern Contour Extraction by Yuan Li, Tao Wu, Rongbing Fu, En Lu

“…In addition, to prevent evolutionary instability during the iteration process, we employed an optimization process that is specifically designed to maintain clear contours along the edges of the pattern. …”
Get full text

Covid-19 pandemic data analysis using tensor methods by Dipak Dulal, Ramin Goudarzi Karim, Carmeliza Navasca

“…We apply a regularized iterative tensor completion technique with a practical regularization parameter estimator to predict the spread of Covid-19 cases and to find and identify hotspots. …”
Get full text

Alignment of vector fields on manifolds via contraction mappings by O.N. Kachan, Yu.A. Yanovich, E.N. Abramov

“…We have proposed an iterative algorithm to directly solve the tangent spaces alignment problem. …”
Get full text

An SEIR epidemic model with constant latency time and infectious period by Edoardo Beretta, Dimitri Breda

“…One delay is the time taken by the infected individuals to becomeinfectious (i.e. capable to infect a susceptible individual), the seconddelay is the time taken by an infectious individual to be removed from theinfection. By iterative schemes and the comparison principle, we provideglobal attractivity results for both the equilibria, i.e. the disease-freeequilibrium $\mathbf{E}_{0}$ and the positive equilibrium $\mathbf{E}_{+}$,which exists iff the basic reproduction number $\mathcal{R}_{0}$ is largerthan one. …”
Get full text

Q-learning Based Meta-Heuristics for Scheduling Bi-Objective Surgery Problems with Setup Time by Ruixue Zhang, Hui Yu, Adam Slowik, Kaizhou Gao

“…Third, Q-learning is used to dynamically choose the optimal local search operator for the current state in each iteration. Finally, by comparing the experimental results of 30 instances, the Q-learning based local search strategy’s effectiveness is verified. …”
Get full text

Estimation of wireless channel fading model in maritime communication for complex meteorological environment by Yasheng DAI, Bolin MA, Guangxue YUE

“…Due to the influence of complex marine environmental factors such as sparse scattering of electromagnetic wave on the ocean surface, wave shadow fading, complex meteorological environment.It is extremely hard to model the fading of wireless channel in maritime communication environment.After analyzing the influence of meteorological environment and multipath channel fading via direct-path, specular-path and diffuse-path on marine wireless communication channel fading, the estimation of wireless channel fading model in maritime communication for complex meteorological environment (EWCFM-CME) was proposed.An improved bee colony algorithm was designed to estimation the parameter of EWCFM-CME.In order to improve the efficiency and accuracy of search algorithm, an iterative function with sin(·) function as operator was designed in search scheme of bee colonies.The leading bee received the detection bee solution to update itself with probability P.It prevents the solution algorithm from falling into local optimization.The simulation results show that, compared with fluctuate two-ray (FTR) fading model and round earth loss (REL) model, the mean absolute error (MAE) of EWCFM-CME increased by 13.58% and 11.43% By comparing EWCFM-CME with cuckoo search, genetic algorithm and simulated annealing algorithm, the search time is reduced by 60.48%, 45.18% and 43.23%, respectively.…”
Get full text

Parallel Simulation of HGMS of Weakly Magnetic Nanoparticles in Irrotational Flow of Inviscid Fluid by Kanok Hournkumnuard, Banpot Dolwithayakul, Chantana Chantrapornchai

“…The speedup of parallel simulation ranges from 1.8 to 21 depending on the number of threads and the domain problem size as well as the number of iterations. With the nature of computing in the application and current multicore technology, it is observed that 4–8 threads are sufficient to obtain the optimized speedup.…”
Get full text

Dynamic Analysis and Scale Optimization of Prefabricated Building Wall Panel Installation by Jiang Mingyang, Zhang Lin, Liu Hongbin, Sima Mingyang, Yu Ningtao

“…The scale optimization model of the landing mechanism, based on the composite shape method and iterative calculation through Matlab software, the optimal scale parameters of each component of the boom lift chain are obtained, and the maximum load of the boom lift cylinder is reduced by about 11%, effectively improving the dynamic performance of the mechanism. …”
Get full text

OPTIMIZATION OF MACHINING PARAMETERS BASED ON ADAPTIVE QUANTUM PARTICLE SWARM NETWORKS (MT) by HAN HuiHui, FU Hui

“…The results show that the parameter matching of the proposed method is more reasonable than that of the PSO method, and it can achieve stable and better surface roughness, tool wear and average maximum completion time in less iterations.…”
Get full text

Vibration Characteristic Analysis of a Coupling System for Compound Biaxial and Inter-Shaft Bearings by Kun Li, Hongchang Ding, Guohua Cao, Han Hou

“…Based on the Runge-Kutta iterative method and Hamilton’s principle, the nonlinear amplitude-frequency response of the system is calculated while taking into account the influence of the compound biaxial eccentricity, as well as the stiffness and radial clearance of the inter-shaft bearing. …”
Get full text

An Improved Strategy for Genetic Evolutionary Structural Optimization by Nannan Cui, Shiping Huang, Xiaoyan Ding

“…Once the PI is less than the preset value which means that the calculation error of some element’s sensitivity is too big or some important elements are mistakenly removed, the penalty gene becomes active to recover those elements and reduce their selection probability in the next iterations. It should be noted that this improvement strategy is different from “freezing,” and the recovered elements could still be removed, if necessary. …”
Get full text

A NEW SPECTRUM DEVELOPMENT METHODOLOGY FOR ACCELERATED DURABILITY TEST by YU JiaWei, ZHENG SongLin, ZHAO ZiShun, DONG YuanMing, JIANG ShangJun

“…Finally,vehicle bench iteration test was conducted,and results show that original spectrum can be replaced by the accelerated spectrum as the durability test spectrum. …”
Get full text

King Solomon’s Mines on film: modernity in reverse? by Stephen COAN

“…This paper explores the strange trajectory of cinema’s iterations of Haggard’s King Solomon’s Mines.…”
Get full text

Research on 5G network base station site selection based on fruit fly optimization algorithm by Wei HUANG

“…Faced with the fact that the spatial distribution of buildings is not considered in the location of 5G network base stations, which makes the base station site selection effect unsatisfactory and leads to the problem of small coverage of base stations, a research method for 5G network base station site selection based on fruit fly optimization algorithm was proposed.The distance from the front line base station to the circular coverage center was calculated, and the satellite communication equipment was used to locate the return signal to obtain the optional position area of the rear base station.The energy consumption of data reception, transmission and aggregation were calculated, and the load balancing of base station data was ensured under the premise of balanced distribution of cellular units.A two-layer location model for base station site selection was built, constraints were set, and the optimal location of base station was determined.The fruit fly optimization algorithm was used to update the position, and after individual update iterative processing, it was not to fall into local optimization and obtain the fine base station site selection position.It can be seen from the experimental results that the minimum losses of the front line and rear base stations in this method are 50 dB and 70 dB, respectively, and the coverage radius of the base station is 6 km, which is consistent with the coverage of the ideal base station.…”
Get full text

TLP: Towards three‐level loop parallelisation by Shabnam Mahjoub, Mehdi Golsorkhtabaramiri, Seyed Sadegh Salehi Amiri

“…This is the responsibility of parallel compilers, which perform parallelisation in several steps by distributing iterations between different processors and executing them simultaneously to achieve lower runtime. …”
Get full text