1,302 research outputs found
Nonterrestrial utilization of materials: Automated space manufacturing facility
Four areas related to the nonterrestrial use of materials are included: (1) material resources needed for feedstock in an orbital manufacturing facility, (2) required initial components of a nonterrestrial manufacturing facility, (3) growth and productive capability of such a facility, and (4) automation and robotics requirements of the facility
Modelling, Monitoring, Control and Optimization for Complex Industrial Processes
This reprint includes 22 research papers and an editorial, collected from the Special Issue "Modelling, Monitoring, Control and Optimization for Complex Industrial Processes", highlighting recent research advances and emerging research directions in complex industrial processes. This reprint aims to promote the research field and benefit the readers from both academic communities and industrial sectors
Advanced Automation for Space Missions
The feasibility of using machine intelligence, including automation and robotics, in future space missions was studied
A study of the layout planning of plant facility based on the timed Petri net and systematic layout planning
The purpose of this research is to solve the problems of unreasonable layout of the production plant, disorder of the logistics process, and unbalanced production line in discrete manufacturing plants. By analyzing the production process and characteristics, the timed Petri net model is constructed according to the function and connection of each production unit, which is then used to generate a FlexSim simulation model of the production plant logistics system with a simulation software. Therewith the FlexSim simulation model is used to simulate the original layout of the plant, and to analyse the simulation data synthetically to put forward an improvement strategy. Combined with the use of the systematic layout planning method to analyze the overall layout of the plant and logistics relations, we infer the relevant drawings between the production units and determine the improved layout of the facilities. Finally, by comparing the before and after improvement simulation results, it is verified that the combination of timed Petri nets and systematic layout planning is effective to ameliorate the layout of the plant facilities and the logistics system. This method makes up for the factors that traditional methods have not considered, achieves the goal of reducing the cross circuitous route of the plant and the idle rate of equipment, and improving the efficiency of production
An Integrated Method for Information and Communication Technology (ICT) Supported Energy Efficiency Evaluation and Optimization in Manufacturing: Knowledge-based Approach and Energy Performance Indicators (EnPI) to Support Evaluation and Optimization of Energy Efficiency
This thesis develops a holistic evaluation and optimization of energy efficiency in manufacturing. The innovation of this thesis consists in the integrated method applying an expressive and adaptive ontology knowledge base capable of learning, and sector-independent, straightforward energy performance indicator for evaluating different processes and units within a company. This thesis also develops a hyper-heuristics-based energy-optimized and flexible production scheduling
Sustainable Supply Chain Management
The book is a collection of studies dedicated to different perspectives of three dimensions or pillars of the sustainability of supply chain and supply chain management - economic, environmental, and social - and other aspects related to performance evaluation, optimization, and modelling of and for sustainable supply chain management, and thus presents another valuable contribution to sustainable development and sustainable way of life
Three Fundamental Trade-offs in Expanding Sustainable Distributions of Manufacturing
The background of the research is the trend towards more inclusive manufacturing. This includes all levels of technologies to enable more diverse geographic and demographic distributions of manufacturing, which can improve ecological and social sustainability. Expanding distributions of manufacturing is of interest to governments, companies, communities and individuals. Interest among government and companies relates to manufacturing being re-shored and redistributed. Interest among communities and individuals is in people having more involvement in the production of what they consume: i.e. prosumption. Expansion of geographic distributions has potential to increase ecological sustainability, for example, by reducing long-distance transportation. Expansion of demographic distributions has potential to increase social sustainability, for example, by increasing the diversity of people involved in manufacturing. The dissertation addresses three research gaps concerned with sustainable distributed manufacturing. In particular, the fundamental challenges of three manufacturing trade-offs are addressed as follows: product originality, product complexity, and product unsustainability versus sustainable distributed manufacturing. There are three main findings from the research. First, technological advances enable expansion of sustainable distributed manufacturing of original products, if the products are small simple original products rather than large complicated original products. Second, technological advances enable sustainable distributed manufacturing of products that are more complex than could otherwise be made far from manufacturing infrastructures, but which nonetheless are not the most complex products. Third, technological advances enable more sustainable distributed production of products with unsustainable features, if technological advances are applied also to some existing distributions of manufacturing. Consideration of these three main findings and three further findings, suggests two complementary strategies for expanding sustainable manufacturing distributions: trade-off reduction and trade-off avoidance. Overall, the research is novel through its inclusion of diverse technologies and distributions of manufacturing in order to determine their relative potential to improve the production of physical goods at more diverse locations by more diverse people
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