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Chrysanthi Aroniadi and Grigorios N. Beligiannis
The Transportation Problem (TP) is a special type of linear programming problem, where the objective is to minimize the cost of distributing a product from a number of sources to a number of destinations. Many methods for solving the TP have been studied...
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Rashmi Radha and Mritunjay Kumar Singh
In this study, a two-dimensional contaminant transport model with time-varying axial input sources subject to non-linear sorption, decay, and production is numerically solved to find the concentration distribution profile in a heterogeneous, finite soil ...
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Jingze Xue, Keyu Zhuang, Tong Zhao, Miao Zhang, Zheng Qiao, Shuai Cui and Yunlong Gao
This paper proposes a control scheme combining improved particle swarm optimization (IPSO) and adaptive linear active disturbance rejection control (ALADRC) to solve the high-speed train (HST) speed tracking control problem. Firstly, in order to meet the...
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Wanqing Zhang, Wanchun Chen and Wenbin Yu
A new, highly constrained guidance law is proposed against a maneuvering target while satisfying both impact angle and terminal acceleration constraints. Here, the impact angle constraint is addressed by solving an optimal guidance problem in which the t...
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Shuai Ma, Xugang Wang and Zhongyuan Wang
The problem of impact time control guidance with field-of-view constraint is addressed based on time-varying sliding mode control. The kinematic conditions that satisfy the impact time control with field-of-view constraint are defined, and then a novel t...
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Xinping Wu, Minjie Xu, Yanqiu Gao and Xianqing Lv
In this study, the time-varying wind stress drag coefficient in the Ekman model was inverted by the cubic spline interpolation scheme based on the adjoint method. Twin experiments were carried out to investigate the influences of several factors on inver...
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Lingbo Liu, Tao Hu, Shuming Bao, Hao Wu, Zhenghong Peng and Ru Wang
(1) Background: Human mobility between geographic units is an important way in which COVID-19 is spread across regions. Due to the pressure of epidemic control and economic recovery, states in the United States have adopted different policies for mobilit...
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Jaime Ahcar-Olmos, David Rodríguez-Barco
Pág. pp. 193 - 219
We estimate the effect of RTAs on bilateral exports by means of a gravity model analyzing its sensitivity to different specifications and methods. RTAs generate a sizable positive effect. However, shifting to country-pair and time-varying fixed effects s...
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Yu Wang, Junci Cao, Qingbin Tong, Guoping An, Ruifang Liu, Yihuang Zhang and Hua Yan
The transient thermal performance of rolling bearings affects the mechanical performance and system safety of traction motors. Most of the traditional empirical formulas used in temperature analysis have been simplified and cannot be completely applied t...
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Eduardo Campos, Rubens Penha Cysne
Pág. 5 - 38
Este artigo avalia a sustentabilidade da dívida pública brasileira usando dados mensais de janeiro de 2003 a junho de 2016 com base na estimação de funções de reação fiscal cujos coeficientes variam ao longo do tempo. Consideramos três métodos de estimaç...
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