Hasil untuk "Systems engineering"

N. Farsad, Huseyin Birkan Yilmaz, A. Eckford et al.

With much advancement in the field of nanotechnology, bioengineering, and synthetic biology over the past decade, microscales and nanoscales devices are becoming a reality. Yet the problem of engineering a reliable communication system between tiny devices is still an open problem. At the same time, despite the prevalence of radio communication, there are still areas where traditional electromagnetic waves find it difficult or expensive to reach. Points of interest in industry, cities, and medical applications often lie in embedded and entrenched areas, accessible only by ventricles at scales too small for conventional radio waves and microwaves, or they are located in such a way that directional high frequency systems are ineffective. Inspired by nature, one solution to these problems is molecular communication (MC), where chemical signals are used to transfer information. Although biologists have studied MC for decades, it has only been researched for roughly 10 year from a communication engineering lens. Significant number of papers have been published to date, but owing to the need for interdisciplinary work, much of the results are preliminary. In this survey, the recent advancements in the field of MC engineering are highlighted. First, the biological, chemical, and physical processes used by an MC system are discussed. This includes different components of the MC transmitter and receiver, as well as the propagation and transport mechanisms. Then, a comprehensive survey of some of the recent works on MC through a communication engineering lens is provided. The survey ends with a technology readiness analysis of MC and future research directions.

J. DeJong, B. M. Mortensen, B. C. Martinez et al.

H. Kitano

R. France, Bernhard Rumpe

The term model-driven engineering (MDE) is typically used to describe software development approaches in which abstract models of software systems are created and systematically transformed to concrete implementations. In this paper we give an overview of current research in MDE and discuss some of the major challenges that must be tackled in order to realize the MDE vision of software development. We argue that full realizations of the MDE vision may not be possible in the near to medium-term primarily because of the wicked problems involved. On the other hand, attempting to realize the vision will provide insights that can be used to significantly reduce the gap between evolving software complexity and the technologies used to manage complexity.

K. Jensen

J. Lynch, K. Loh

E. P. Carden, P. Fanning

P. Kokotovic, H. Khalil, J. O'Reilly

Brian D. O. Anderson, J. B. Moore

N. Peppas, J. Z. Hilt, A. Khademhosseini et al.

B. Selić

G. Beni, Jing Wang

Y. Adewuyi

Fei-Yue Wang

N. Jennings

V. V. Lebedev

A comprehensive study of the current state and development prospects of the heat and power industry in Russia has been conducted. The structure of fuel and energy resources consumption, as well as the role of heat supply in ensuring the sustainable functioning of the country’s economy have been analyzed. Special attention has been paid to the intersectoral nature of thermal energy and its impact on industry, housing and communal services, and the social sphere. The high energy intensity of the industry has been emphasized, and the need to optimize the processes of generating, distributing, and consuming thermal energy has been pointed out. Various types of heat supply systems – centralized and decentralized – have been studied in terms of their efficiency, environmental friendliness, and economic feasibility. The current dynamics of these systems development in the context of regional specifics and climatic conditions has been described. The key issues of the industry have been analyzed, including uneven distribution of generating capacities, high level of physical wear of equipment, significant losses of thermal energy in distribution networks, as well as insufficient transparency and accuracy of consumption accounting. An important place in the study is devoted to the issues of tariff formation, and both technical and economic factors have been considered, including excess losses, excess costs, the investment component of tariffs, and the need to modernize infrastructure. A forecast of the Russian thermal power industry development has been proposed, and the main barriers hindering its modernization have been identified. Possible ways to increase the energy and economic efficiency of the industry in the face of rising fuel prices and stricter environmental requirements have been listed.

Sharadhi Gunathilake, Ampalavanapillai Nirmalathas, Kosala Herath et al.

The growing passion for indoor optical wireless networks reflects their immense capability to deliver consistent high-quality data connectivity across diverse indoor environments. This study examines how polarization can be engineered to enhance near-field beam focusing in optical wireless indoor networks using a modular clustered optical phased array aperture. The aperture follows a ceiling-mounted phased array embedded within a phased array layout, associating planar clusters of dipole nano-emitters, supported by a dual-carrier architecture for grating lobe mitigation. We introduce a polarization-adaptive synthesis strategy that determines the cluster-level emitter polarization to replicate any desired polarization at the focal spot. The optimization model accommodates both unconstrained and constrained modes, enabling electric (E)-field matching from linear to general elliptical receiver states. Moreover, we analyze how quantization can be applied to these optimized orientations and how it affects the final performance. To learn the benefits of polarization orthogonality in a multi-receiver environment, we extend the aperture to simultaneously manage multiple focused beams via sub-cluster segmentation. At this level, we apply two polarization control strategies: continuous-domain polarization optimization and binary polarization assignment to match user-specific polarization states and suppress inter-user interference. Numerical estimates of per-receiver signal-to-interference-plus-noise ratio (SINR), E-field patterns, beam characteristics, and mean SINR trends with increasing user availability confirm the superior performance of the proposed techniques over systems that do not consider polarization. Under realistic system- and hardware-level constraints, our results deepen understanding of polarization-engineered modular optical phased arrays and demonstrate their potential for efficient and secure next-generation indoor networks.

J. Whittle, J. Hutchinson, M. Rouncefield

Despite lively debate over the past decade on the benefits and drawbacks of model-driven engineering (MDE), there have been few industry-wide studies of MDE in practice. A new study that surveyed 450 MDE practitioners and performed in-depth interviews with 22 more suggests that although MDE might be more widespread than commonly believed, developers rarely use it to generate whole systems. Rather, they apply MDE to develop key parts of a system.

D. Dori, EDWARD F. Crawley

Khadija Talbi, Zineb Ait Haddouchane, Soumia Bakkali et al.

The rapid advancement of digital technologies, referred to as Industry 4.0, has profoundly transformed the manufacturing landscape, necessitating a reevaluation of engineering education. Future engineers must possess diverse skills and competencies to effectively navigate this new era of intelligent, interconnected, and data-driven production systems. In response to this challenge, this research paper introduces a framework for a virtual laboratory in mechanical and industrial engineering that creates a laboratory in virtual reality (VR) by integrating Lean Manufacturing principles to optimize flow shop processes, thereby preparing engineering students for the demands of Industry 4.0. This approach prepares students to navigate the challenges of modern manufacturing, bridging the gap between theoretical knowledge and its practical application. This paper will discuss the concept of the virtual laboratory for mechanical and industrial engineering education in the Moroccan context based on lean principles.