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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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Gottfried Sachs and Benedikt Grüter
Dynamic soaring is a non-powered flight mode that enables extremely high speeds by extracting energy from thin shear wind layers. Trajectory optimization is applied to construct solutions of the maximum speed achievable with dynamic soaring and to determ...
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Akwasi F. Mensah and Leonardo Dueñas-Osorio
This paper proposes a closed-form method to evaluate wind turbine system reliability and associated failure consequences. Monte Carlo simulation, a widely used approach for system reliability assessment, usually requires large numbers of computational ex...
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Wang Shanda, Luo Xiao, Luo Qingsheng and Han Baoling
This paper primarily studies the existence conditions for the closed-form inverse kinematic solution for revolute serial robots. Based on the results, a general closed-form inverse solution algorithm is designed.
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Mosleh Ali Al-Shamrani, Arif Ali Baig Moghal
Pág. Page 109 - 125
Simple closed-form solutions for the undrained bearing capacity of strip footings on anisotropic cohesive soils are derived employing kinematical approach of limit analysis. Both modified Hill-type and translational failure mechanisms, with variable wedg...
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Wadslin Frenelus and Hui Peng
The time-dependent behavior and long-term stability of deep-buried tunnels in soft rocks have received lots of considerations in tunnel engineering and allied sciences. To better explore and deepen the engineering application of rock creep, extensive res...
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Allan Jonathan da Silva, Jack Baczynski and José Valentim Machado Vicente
We introduce a novel stochastically correlated two-factor (i.e., bivariate) diffusion process under the square-root format, for which we analytically obtain the corresponding solutions for the conditional moment-generating functions and conditional chara...
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Elias Gravanis, Evangelos Akylas and Ernestos Nikolas Sarris
We construct approximate analytical solutions of the Boussinesq equation for horizontal unconfined aquifers in the buildup phase under constant recharge and zero-inflow conditions. We employ a variety of methods, which include wave solutions, self-simila...
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Efthimios Providas
Recent developments have shown that the widely used simplified differential model of Eringen?s nonlocal elasticity in nanobeam analysis is not equivalent to the corresponding and initially proposed integral models, the pure integral model and the two-pha...
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Jae-Hyun Ro, Woon-Sang Lee, Hyun-Sun Hwang, Duckdong Hwang, Young-Hwan You and Hyoung-Kyu Song
This paper proposes an estimation scheme of the number iterations for optimal Gauss?Seidel (GS) pre-coding in the downlink massive multiple input multiple output (MIMO) systems for the first time. The number of iterations in GS pre-coding is one of the k...
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Junlin Zhang, Hai Yang
Pág. 313 - 322
Fare and frequency determination is essential in transit operations. In this paper, passenger demand is analysed and embodied under distributed passengers? willingness to pay. The transit operator's objective is defined as a weighted combination of opera...
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Jing Yang, Xuhui He, Haiquan Jing, Hanfeng Wang and Sévérin Tinmitonde
Dynamics of the double-beam system under moving loads have been paid much attention due to its wide applications in reality from the analytical point of view but the previous studies are limited to the simply supported boundary condition. In this study, ...
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Kyle R. Bryenton, Andrew R. Cameron, Keegan L. A. Kirk, Nasser Saad, Patrick Strongman and Nikita Volodin
The analysis of many physical phenomena is reduced to the study of linear differential equations with polynomial coefficients. The present work establishes the necessary and sufficient conditions for the existence of polynomial solutions to linear differ...
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Efthimios Providas and Ioannis Nestorios Parasidis
Integro-differential equations involving Volterra and Fredholm operators (VFIDEs) are used to model many phenomena in science and engineering. Nonlocal boundary conditions are more effective, and in some cases necessary, because they are more accurate me...
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Efthimios Providas
In this paper, a direct operator method is presented for the exact closed-form solution of certain classes of linear and nonlinear integral Volterra?Fredholm equations of the second kind. The method is based on the existence of the inverse of the relevan...
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Jabbar Hussein Mohmmed, Mauwafak Ali Tawfik, Qasim Abbas Atiyah
Pág. 41 - 55
This study proposes an analytical solution of natural frequencies for an inclined fixed supported Euler-Bernoulli pipe containing the flowing fluid subjected to thermal loads. The integral transform technique is employed to obtain the spatial displacemen...
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Ke Wang, Chan-Tong Lam and Benjamin K. Ng
Reconfigurable intelligent surface (RIS) has been envisioned as one of the promising solutions for enhancing signal transmissions in high-speed communications (HSC). In this paper, we present a time-varying channel model with distance-dependent Rician fa...
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Federico Cluni, Stefano Fiorucci, Vittorio Gusella and Massimiliano Gioffrè
The use of equivalent beam models to estimate the dynamical characteristics of complex tall buildings has been investigated by several authors. The main reason is the structural response estimation to stochastic loads, such as wind and earthquake, using ...
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Huifang Pan and Qi Zhu
In this paper, to maximize the energy efficiency (EE) in the two-hop multi-relay cooperative decoding and forwarding (DF) system for simultaneous wireless information and power transmission (SWIPT), an optimal power allocation algorithm is proposed, in w...
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Xinggui Zeng, Shao-Fei Jiang and Donghua Zhou
In a steel-concrete composite beam (hereafter referred to as a composite beam), partial interaction between the concrete slab and the steel beam results in an appreciable increase in the beam deflections relative to full interaction behavior. Moreover, t...
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