Seismic Sequence Effects on Buried Pipelines Crossing Nonuniform Sites with Ground Settlement by Dynamic Centrifuge Test by Hongtao Zhang, Yufei Zhao, Mingxu Gao

“…Two simulated seismic waves with 0.6 g and 0.3 g of input peak ground accelerations (PGAs) were inputted in sequence to simulate the strong and weak earthquakes. …”
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Study on the Unbalanced Fault Dynamic Characteristics of Eccentric Motorized Spindle considering the Effect of Magnetic Pull by Zhan Wang, Wenzhi He, Siyuan Du, Zhe Yuan

“…The experimental results are consistent with the simulation results, which further verify the accuracy of the model. …”
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Robust reinforcement learning algorithm based on pigeon-inspired optimization by Mingying ZHANG, Bing HUA, Yuguang ZHANG, Haidong LI, Mohong ZHENG

“…Reinforcement learning(RL) is an artificial intelligence algorithm with the advantages of clear calculation logic and easy expansion of the model.Through interacting with the environment and maximizing value functions on the premise of obtaining little or no prior information, RL can optimize the performance of strategies and effectively reduce the complexity caused by physical models .The RL algorithm based on strategy gradient has been successfully applied in many fields such as intelligent image recognition, robot control and path planning for automatic driving.However, the highly sampling-dependent characteristics of RL determine that the training process needs a large number of samples to converge, and the accuracy of decision making is easily affected by slight interference that does not match with the simulation environment.Especially when RL is applied to the control field, it is difficult to prove the stability of the algorithm because the convergence of the algorithm cannot be guaranteed.Considering that swarm intelligence algorithm can solve complex problems through group cooperation and has the characteristics of self-organization and strong stability, it is an effective way to be used for improving the stability of RL model.The pigeon-inspired optimization algorithm in swarm intelligence was combined to improve RL based on strategy gradient.A RL algorithm based on pigeon-inspired optimization was proposed to solve the strategy gradient in order to maximize long-term future rewards.Adaptive function of pigeon-inspired optimization algorithm and RL were combined to estimate the advantages and disadvantages of strategies, avoid solving into an infinite loop, and improve the stability of the algorithm.A nonlinear two-wheel inverted pendulum robot control system was selected for simulation verification.The simulation results show that the RL algorithm based on pigeon-inspired optimization can improve the robustness of the system, reduce the computational cost, and reduce the algorithm’s dependence on the sample database.…”
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Numerical investigation of the influence of pulse frequency on the weld pool size in pulsed current TIG welding by Shahid Parvez, Magdy El Rayes, Essam Al-Bahkali, Khalid Alqosaibi

“…This study simulates the pulsed current tungsten inert gas (TIG) welding process to investigate the transient development of the weld pool in a 4 mm thick aluminum sheet, focusing on the effects of pulse frequency on the weld pool size. …”
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ZEQoS: A New Energy and QoS-Aware Routing Protocol for Communication of Sensor Devices in Healthcare System by Zahoor Ali Khan, Shyamala Sivakumar, William Phillips, Bill Robertson

“…The protocol then selects the best possible path(s) for OPs, RSPs, and DSPs by considering their QoS requirement. Extensive simulations using OMNeT++ based simulator Castalia 3.2 demonstrate that the performance of the proposed integrated algorithm is satisfactory when tested on a real hospital scenario, and all data types including OPs, DSPs, and RSPs are used as offered traffic. …”
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Modeling of Planetary Wave Influences on the Pre‐reversal Enhancement of the Equatorial F Region Vertical Plasma Drift by Y. Yamazaki, C. Diéval

“…It is shown that the simulated day‐to‐day variability of the PRE intensity is predominantly due to forcing by waves with periods less than 2 days, that is, tides and their modulation. …”
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The Outlook of Precipitation Changes in the Great Karoun Using by CMIP5 series models by zeinab mokhayeri, Ebrahim fatahi, Reza Borna

“…These simulations were based on four scenarios (RCP2.6, RCP4.5, RCP6, and RCP8.5) with a spatial resolution of 0.5 x 0.5 using the BCSD method. …”
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Numerical modelling of interaction of cemented natural fractures and hydraulic fractures by Haiyang Wang, Peiyao Xiao, Desheng Zhou, Qingqing Wang

“…In this study, a fully fluid-solid coupling numerical model simulating hydraulic fracture propagation was developed to simulate the interaction propagation of hydraulic fractures and CNFs based on the particle flow method. …”
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Performance evaluation of hydrophilic organic polymer sorbents for desiccant air-conditioning applications by Muhammad Sultan, Takahiko Miyazaki, Shigeru Koyama, Zahid M Khan

“…Honeycomb-like desiccant blocks composed of PS-I/PS-II are assumed for numerical simulation analysis. The numerical simulation model is programmed into MATLAB which utilizes the scientific relationships of adsorption isotherms, adsorption kinetics, isosteric heat of adsorption, and thermophysical properties for each sorbent. …”
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Effect of Wetting-Drying Cycle on the Deformation and Seepage Behaviors of Rock Masses around a Tunnel by Qingzhen Guo, Haijian Su, Hongwen Jing, Wenxin Zhu

“…To investigate the effect of the wetting-drying cycle on the stability of the tunnel surrounding rock, physical experiments and numerical simulations regarding the process of tunnel excavation with different wetting-drying cycle numbers were performed in this study. …”
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EXTRACTION AND VERIFICATION OF LOAD SPECTRUM OF STEERING KNUCLE BASED ON VIRTUAL ITERATION METHOD by DONG GuoJiang, WANG Wei, DU Fei, LANG YuLing

“…The load spectrum of automotive chassis components is the key factor to analyze the fatigue,reliability and durability of components.However,it still needs further practice and direct verification in the process of extracting road load spectrum and the key link processing,as well as error evaluation,etc.Based on this,this paper takes a certain type of automobile steering knuckle as the research object,established rigid-flexible coupling multi-body dynamic simulation model of the whole vehicle,and calibrated it through the test site reinforced the road test,the error between the monitoring signal of the measured key points and the iterative simulation is less than 30%,which verifies the response accuracy of the vehicle multi-body model; The load spectrum of road surface strengthened by endurance test of real vehicle was collected,and the load spectrum of steering knuckle connection points was obtained by simulation decomposition using virtual iteration method; Take typical working conditions of stone road Cand washboard road as examples,the inertia release method was used to solve the time-domain strain field of steering knuckle by using the load spectrum of connection points as input excitation,and time-domain strain curves of monitoring points are obtained,the relative error of the analysis of measured signals is less than 20%,which meets the accuracy requirements of the subsequent use of the load spectrum.The results show that strain calibration method is a direct verification of the effect of virtual iteration load spectrum extraction,which proves the feasibility and accuracy of the load spectrum extraction technical route,and provides a reference for the development of automobile chassis parts and fatigue durability analysis and verification.…”
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Gate Dispatching in Tidal River Network Areas Based on EFDC Model by ZHANG Xianguo, WANG Huipeng, HUANG Miansong, ZHENG Lei, LIU Xiaofang

“…Hydrodynamic regulation is an important measure to control black and malodorous water bodies and create a good water environment and water ecology.For tidal river network areas,the key to the treatment of water environment problems is to control the hydrodynamics of gates and pumping stations to achieve running water circulation.This paper simulates the hydrodynamic dispatching of the water quality maintenance of the water system in the tidal river network area of Fuzhou.A hydrodynamic water quality model based on the Environmental Fluid Dynamics Code (EFDC) is constructed for the complex river network of Fuzhou to simulate the influence of gate and pump dispatching under different water quality goals and diversion conditions in the study area on changes in water quality of river channels.According to the simulations of the model,it is concluded that the use of tidal range for diversion can reduce the operation and maintenance costs but cannot maintain the water quality at an excellent level.The use of pumping stations for diversion can rapidly restore the water quality of river channels,but pumping stations in different locations can lead to different effects on the water quality,and thus adjustment is required according to the actual operation and maintenance goals.The simultaneous opening of the gates on the south side of the water system and the pumping stations can easily cause reciprocating flow of water in the central area of the river network and result in water body turbulence,which is not conducive to the restoration and maintenance of water quality.Therefore,they should not be opened at the same time during operation.The conclusions of this paper can provide references for the implementation of water quality maintenance and hydrodynamic control in tidal river network areas.…”
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Parametric Investigation of Dual-Mass Flywheel Based on Driveline Start-Up Torsional Vibration Control by Liupeng He, Changgao Xia, Sida Chen, Jiwei Guo, Yi Liu

“…On the basis of driveline excitation analysis during engine start-up, the analytical model of DMF driveline torsional vibration system is built and simulated. The vehicle start-up test is conducted and compared with the simulation results. …”
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Study on Stability of Small Clearance Shield Tunnel Excavation Face by GAO Qi

“…Numerical simulation is used to analyze the instability mode and limiting support pressure of double-line small clearance shield tunnel face. …”
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Analysis of the Influence of Groundwater Level Fluctuation on Karst Soil Cave Collapse by Xuejun Chen, Mingming Xue, Yu Song

“…Therefore, the combination of physical model test and FLAC3D numerical simulation is adopted to simulate the soil cave collapse caused by three different initial water level fluctuations in this paper. …”
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Two-Stroke Thermodynamic Cycle Optimization of a Single-Cylinder Free-Piston Engine Generator by Houliang Yu, Zhaoping Xu, Qinglin Zhang, Liang Liu, Ru Hua

“…Then, the two-stroke thermodynamic cycle is simulated and compared under the different control parameters of intake air pressure, injection timing, ignition timing, and valve timing through the simulation model. …”
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Tsunami modelling over global oceans by Siva Srinivas Kolukula, P. L. N. Murty, T. Srinivasa Kumar, E. Pattabhi Ramarao, Ramana Murthy M. V

“…The current study focuses on tsunami simulations over global oceans. A finite element (FE)-based ADvanced CIRCulation (ADCIRC) model is configured to the global domain to model global tsunamis accurately and efficiently. …”
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Analysis of River Blocking Induced by a Debris Flow by Lijuan Wang, Ming Chang, Xiangyang Dou, Guochao Ma, Chenyuan Yang

“…The accuracy of the spreading of the numerical simulation is about 90%. The simulation indicated a small volume of sediment entering the river for a rainfall under 5-year return period. …”
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The Effect of Reynolds Number on Jet in Asymmetric Co-Flows: A CFD Study by Ziyan Teng, I. A. Sofia Larsson, T. Staffan Lundström, B. Daniel Marjavaara

“…For further validation and understanding, more measurements in the shear layer and simulations with more advanced turbulence models are necessary.…”
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An Efficient Policy-Based Scheduling and Allocation of Virtual Machines in Cloud Computing Environment by S. Supreeth, Kirankumari Patil, Shantala Devi Patil, S. Rohith, Y. Vishwanath, K. S. Venkatesh Prasad

“…To demonstrate the proposed algorithm’s efficiency, the simulations are carried out using the Java language-based CloudSim simulator, and the proposed mechanism outcomes acquired are compared with the existing approaches. …”
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