Mathematical Problems in Engineering

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c‐Bottlenecks in serial production lines: Identification andapplication
Mathematical Problems in Engineering - Tập 7 Số 6 - Trang 543-578 - 2001
Shu-Yin Chiang, C.-T. Kuo, Semyon M. Meerkov
The bottleneck of a production line is a machine that impedes the system performance in the strongest manner. In production lines with the so‐called Markovian model of machine reliability, bottlenecks with respect to the downtime, uptime, and the cycle time of the machines can be introduced. The two former have been addressed in recent publications [1] and [2]. The latter is investigated i...... hiện toàn bộ
Review on Methods to Fix Number of Hidden Neurons in Neural Networks
Mathematical Problems in Engineering - Tập 2013 - Trang 1-11 - 2013
K. Gnana Sheela, S. N. Deepa
This paper reviews methods to fix a number of hidden neurons in neural networks for the past 20 years. And it also proposes a new method to fix the hidden neurons in Elman networks for wind speed prediction in renewable energy systems. The random selection of a number of hidden neurons might cause either overfitting or underfitting problems. This paper proposes the solution of these proble...... hiện toàn bộ
Functional Data Approach for Short-Term Electricity Demand Forecasting
Mathematical Problems in Engineering - Tập 2022 - Trang 1-14 - 2022
Ismail Shah, Faheem Jan, Sajid Ali
In today’s liberalized electricity markets, modeling and forecasting electricity demand data are highly important for the effective management of the power system. However, electricity demand forecasting is a challenging task due to the specific features it exhibits. These features include the presence of extreme values, spikes or jumps, multiple periodicities, long trend, and bank holiday...... hiện toàn bộ
Nonlinear Modeling of Cables with Flexural Stiffness
Mathematical Problems in Engineering - Tập 2008 Số 1 - 2008
Walter Lacarbonara, Arnaud Pacitti
A geometrically exact formulation of cables suffering axis stretching and flexural curvature is presented. The dynamical formulation is based on nonlinearly viscoelastic constitutive laws for the tension and bending moment with the additional constitutive nonlinearity accounting for the no‐compression condition. A continuation method, combined with a mixed finite‐difference spatial dis...... hiện toàn bộ
Recent Research Trends in Genetic Algorithm Based Flexible Job Shop Scheduling Problems
Mathematical Problems in Engineering - Tập 2018 - Trang 1-32 - 2018
Muhammad Kamal Amjad, Shahid Ikramullah Butt, Rubeena Kousar, Riaz Ahmad, Mujtaba Hassan Agha, Faping Zhang, Anjum Naveed, Umer Asgher
Flexible Job Shop Scheduling Problem (FJSSP) is an extension of the classical Job Shop Scheduling Problem (JSSP). The FJSSP is known to be NP-hard problem with regard to optimization and it is very difficult to find reasonably accurate solutions of the problem instances in a rational time. Extensive research has been carried out in this area especially over the span of the last 20 years in...... hiện toàn bộ
A Novel Memetic Algorithm Based on Decomposition for Multiobjective Flexible Job Shop Scheduling Problem
Mathematical Problems in Engineering - Tập 2017 Số 1 - 2017
Chun Wang, Zhicheng Ji, Yan Wang
A novel multiobjective memetic algorithm based on decomposition (MOMAD) is proposed to solve multiobjective flexible job shop scheduling problem (MOFJSP), which simultaneously minimizes makespan, total workload, and critical workload. Firstly, a population is initialized by employing an integration of different machine assignment and operation sequencing strategies. Secondly, multiobjectiv...... hiện toàn bộ
Model and Algorithm for Container Allocation Problem with Random Freight Demands in Synchromodal Transportation
Mathematical Problems in Engineering - Tập 2015 - Trang 1-13 - 2015
Yan Xu, Chengxuan Cao, Bin Jia, Guangzhi Zang
This paper aims to investigate container allocation problem with random freight demands in synchromodal transportation network from container carriers’ perspective. Firstly, the problem is formulated as a stochastic integer programming model where the overall objective is to determine a container capacity allocation plan at operational level, so that the expected total transportation profi...... hiện toàn bộ
Efficient Sensorless Speed Estimation of Electrical Servo Drives Using a Full-Order Nonsingular Terminal Sliding Mode Observer
Mathematical Problems in Engineering - Tập 2021 - 2021
Nguyen, Tan-No, Pham, Thanh-Binh, Hoang, Van-Trong, Nguyen, Tan-Tien, Nguyen, Viet-Long, Truong, Nguyen-Vu
This paper proposes an efficient sensorless speed estimation approach for electric servo drives based on the full-order nonsingular terminal sliding mode observer (FONTSM) with the application of DC motor drives. In this method, a specific full-order terminal sliding mode manifold is utilised for the observer design which results in the elimination of the chattering and avoiding the singularity ph...... hiện toàn bộ
Quantifying Poverty Temporal Changes in Association with Rural Transition in Guangxi, China
Mathematical Problems in Engineering - Tập 2016 - Trang 1-11 - 2016
Heyuan You
Poverty is a social problem in developing countries, especially for the rural places experiencing rapid transition. This study characterizes the temporal changes of rural poverty under rural transition during 1991–2010 in Guangxi. In particular, poverty is measured by the Foster-Greer-Thorbecke method, and rural transition is described from three aspects including rural industrialization, ...... hiện toàn bộ
DEMATEL Technique: A Systematic Review of the State-of-the-Art Literature on Methodologies and Applications
Mathematical Problems in Engineering - Tập 2018 - Trang 1-33 - 2018
Shengli Si, Xiao‐Yue You, Hu‐Chen Liu, Ping Zhang
Decision making trial and evaluation laboratory (DEMATEL) is considered as an effective method for the identification of cause-effect chain components of a complex system. It deals with evaluating interdependent relationships among factors and finding the critical ones through a visual structural model. Over the recent decade, a large number of studies have been done on the application of ...... hiện toàn bộ
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