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Wyniki wyszukiwania dla: bi-objective design
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In Search for Answers: Light4Health Online Course of Health Research for Interior Lighting Design
PublikacjaThree years ago, when I wrote an article in arc called: Human Centric Lighting. The New X Factor? (arc no. 108 Feb/Mar 2019), my intention was to raise questions in relation to the new topic and to find solid, research-based answers in the years to come. Today, I am happy to report that the lighting community, with the Light4Health Online Course of Health Research for Interior Lighting Design, has a useful tool, and consortium...
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New Design of Axial Piston Pump with Displaced Swash Plate Axis of Rotation for Hydro-Mechanical Transmissions
PublikacjaThis paper presents a prototype design of an axial piston pump with displaced swash plate axis of rotation in two directions of discharge with electronic control intended for installation on a hydraulic-mechanical gearbox dedicated to working machines. The effect of displacement of the swash plate rotation axis on dead space volume and volumetric efficiency is presented. The construction and principle of operation of the capacity...
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Rapid simulation-driven design of miniaturised dual-band microwave couplers by means of adaptive response scaling
PublikacjaOne of the major challenges in the design of compact microwave structures is the necessity of simultaneous handling of several objectives and the fact that expensive electromagnetic (EM) analysis is required for their reliable evaluation. Design of multi-band circuits where performance requirements are to be satisfied for several frequencies at the same time is even more difficult. In this work, a computationally efficient design...
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Accelerated large scale test set-up design in natural corrosion marine environment
PublikacjaThe standards for conducting small-scale specimen tests are well developed, but there is a lack of direct guidelines for conducting corrosion tests for large-scale specimens. The objective here is to develop a methodology which may be used in designing an accelerated corrosion test of large-scale structural components subjected to a natural corrosion marine environment. Different factors influencing corrosion degradation of steel...
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The resilient city in architectural engineering education: a joint design studio between Gdańsk and Chalmers universities of technology
PublikacjaChallenges to society, such as those posed by climate change require a new approach to the education of the engineer-architect. Contemporary solutions should serve future generations and that is why the idea of the resilient city should be discussed and implemented, both in theory and in practice. It is necessary to teach students to design urban structures in such a way that they are resilient to dynamically changing conditions....
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Local-Global Space Mapping for Rapid EM-Driven Design of Compact RF Structures
PublikacjaIn this work, we introduce a robust and efficient technique for rapid design of compact RF circuits. Our approach exploits two-level space mapping (SM) correction of an equivalent circuit model of the structure under design. The first SM layer (local correction) is utilized to ensure good matching between the equivalent circuit and the electromagnetic model at the component level. On the other hand, the global correction allows...
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Analysis of Validation and Simplification of Timber-Frame Structure Design Stage with PU-Foam Insulation
PublikacjaThe transition from experimental studies to the realm of numerical simulations is often necessary for further studies, but very difficult at the same time. This is especially the case for extended seismic analysis and earthquake-resistant design. This paper describes an approach to moving from the experimental testing of an elementary part of a wood-frame building structure to a numerical model, with the use of a commercial engineering...
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Experimental Tests Of Sandwich Beams In The Design Process Of GFRP Shell Footbridge Structure
PublikacjaThe paper includes selected aspects of the study to elaborate architectural, material and construction design of pedestrian footbridge spans made of composite materials. The considered footbridge is a sandwich-type shell structure. The cooperation of PET foam core with outer lining surfaces is crucial for its load bearing capacity. The paper is aimed to experimental investigation of sandwich beams subjected to bending loading....
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The role of SSVF and SSHF beds in concentrated wastewater treatment, design recommendation
PublikacjaThe return flows of reject water from sewage sludge dewatering alter the activated sludge process ina conventional WWTP and increase TN concentration in the final effluent from WWTP. The objectiveof the investigation carried out was to consider the application of multistage treatment wetland(MTW) for the treatment of reject water from sewage sludge dewatering in a centrifuge (RWC). Thispaper aims to present the design and performance...
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Slurry Erosion -Design of Test Devices
PublikacjaDegradation of material caused by impacts of a solid particle (erodent) suspended in a liquid is called slurry erosion and is a major problem in the hydropower and maritime industry. Slurry erosion depends on many factors, e.g. liquid and erodent velocity, size, shape, angle of impact, hardness and number of erodents, and strength of a target material. The various types of test devices have been designed to investigate an effect...
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A new approach to the prosthetic finger design
PublikacjaW pracy zaprezentowano nowy sposób projektowania protez ręki przy użyciu aplikacji CAD. Uzyskano projekt palca wskazującego, w którym zaproponowano napęd poszczególnych członów w oparciu o stopy z pamięcią kształtu.
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Selected aspects of system design theory.
PublikacjaPrzedstawiono wybrane zagadnienia z teorii projektowania systemów. Szczgólną uwagę zwrócono na problemy występujące w systemach o dużej złożoności, które charakteryzują się skomplikowaną funkcją globalną, jak również dużą ilością elementów należących do takich systemów. Omówiono także niektóre cechy elementów wynikające z różnych procesów wytwarzania oraz ich wpływ na funkcję, strukturę i eksploatację systemu, powstałego ze skojarzenia...
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The methods of design reliable distributed networks
PublikacjaOpisano dwie metody projektowania niezawodnych sieci rozległych. W pierwszej metodzie przyjęto, że koszt konstrukcji każdego połączenia jest jednakowy, w drugiej koszty opisuje zadana macierz kosztów. Jako parametr niezawodnościowy przyjęto liczbę niezależnych dróg pomiędzy węzłami sieci. Pierwsza z metod jest metodą dokładną, druga heurystyczną. Zdefiniowano i oceniono błąd metody heurystycznej. Opublikowano wyniki otrzymane...
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Multicriteria optymization method for yacht design
PublikacjaArtykuł dotyczy optymalizacji wielokryterialnej projektowania innowacyjnego systemu jachtowego w taki sposób by osiągnąć polepszone zachowanie dynamiczne w dowolnych warunkach nawigacji morskiej. W artykule skoncentrowano się na komputerowej symulacji, modelowaniu i optymalizacji matematycznego modelu jachtu w różnych warunkach żeglowania w celu poprawy zdolności manewrowania i zwiększenia szybkości. Przeprowadza się symulację...
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Selected aspects of system design theory.
PublikacjaPrzedstawiono wybrane fragmenty z teorii i techniki projektowania złożonych systemów technicznych. Zwrócono szczególną uwagę na tworzenie schematów strukturalnych i funkcjonalnych systemów, a także występujących tam relacji między elementami takiego systemu. Opisano kolejne kroki postępowania dla doboru cech elementów systemu wg macierzy ich przewidywanych właściwości oraz przykłady podziału dla istniejących składników systemów...
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Problems of ship system design for safety.
PublikacjaSystem bezpieczny to taki, który nie stwarza ryzyka większego niż przyjęte w odpowiednich kryteriach. Kryteria te mogą być wyrażone jakościowo oraz ilościowo. Bezpieczeństwo jako atrybut systemu może być przedmiotem projektowania. Rozróżniono tutaj dwa przypadki: A - dotyczące systemu dla którego właściwe są kryteria jakościowe i B - dotyczące systemu dla którego zastosowano kryteria ilościowe. W uwagach końcowych przedyskutowano...
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Analysis and design of a polarizer rotator system
PublikacjaW artykule przedstawiono metodę analizy wielosekcyjnego polaryzatora złożonego z periodycznych szyków obiektów cylindrycznych. W celu analizy badanej struktury zastosowano metodę pełnofalową opartą na metodzie dopasowania rodzajów. Opracowany algorytm został zweryfikowany poprzez porównanie uzyskanych wyników z wynikami otrzymanymi z przybliżonego modelu transmisyjnego oraz z własnymi pomiarami wykonanego prototypu.
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Geosynthetics tests in hydrotechnical structures design
PublikacjaW celu właściwego stosowania w konstrukcjach budowlanych (w tym również hydrotechnicznych)geosyntetyków - zarówno przepuszczalnych (geotekstylia i wyroby pokrewne) jak i nieprzepuszaczalnych (geomembrany i kompozyty uszczelniające), bardzo ważne jest wcześniejsze poddawanie go odpowiednim badaniom, których procedura musi być ściśle powiązana z późniejszym przeznaczeniem geomateriału i uwzględniać warunki, w jakich materiał będzie...
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Dichotomous design of real-time systems
PublikacjaW pracy prezentuje się i analizuje dwie podstawowe metody projektowania komputerowych systemów czasu rzeczywistego, spełniających rozmaite zadania z zakresu automatyki, sterowania, nadzoru i diagnostyki, w których następuje interakcja komputera z obiektami i procesami przemysłowymi, które posiadają naturę ciągłą (pozwalającą na ścisłą matematyczną charakteryzację w czasie ciągłym). Definiuje się podejście uwarunkowane kontekstowo...
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Ethical aspects of the sustainable architectural design
PublikacjaWobec wyzwań rozwoju zrównoważonego praktyka architektoniczna ulega przeobrażeniu. Coraz wyraźniej akcentowane są kwestie społeczne i ekologiczne. Etyka środowiskowa, której przedmiotem refleksji jest człowiek i środowisko, stanowi podstawę filozoficzną koncepcji zrównoważonego projektowania architektonicznego. W kształtowaniu przestrzeni pojawia się podstawowe pytanie - co jest dobre dla środowiska? Problemem projektowania rodzącym...
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Study of rotational separators operation and design
PublikacjaOmówiono zasadę działania i podstawy projektowania separatorów cyrkulacyjnych, wyrózniając separatory wirowe oraz cyklony.Przeanalizowano bilans sił, działających na cząstkę usuwanej zawiesiny. Na przykładzie obliczeniowym wykazano wady istniejących metod projektowych. Przedstawiono ogólną koncepcję nowej metody.
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User-System Interaction Design in IT Projects
PublikacjaMonografia omawia główne wymagania dla interfejsu użytkownika oraz przedstawia przegląd metod przydatnych do projektowania interakcji użytkownik-system, jak i do organizowania współpracy z użytkownikami w projektach informatycznych. Znaczną część monografii poświęcono zagadnieniom projektowania koncepcyjnego oraz testowania i oceny powstających rozwiązań. Szczególne miejsce zajmują różne techniki prototypownia oraz zasady prowadzenia...
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Microstructural Design of Ba0.5La0.5Co0.5Fe0.5O3 Perovskite Ceramics
PublikacjaBa0.5La0.5Co0.5Fe0.5O3 was synthesized in the solid-state reaction route. The influence of ball milling parameters (such as milling media size, angular velocity, and time), pelletizing pressure, and annealing parameters on the microstructure was studied. The grain size distribution and density or specific surface area changes were investigated in each approach while the individual parameters were changed. The evaluation of BLCF...
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Technology-Enhanced Environmental Learning: Co-design of Educational Mobile Application Case
PublikacjaThe process of co-creating an educational mobile application to support environmentally friendly behavior is presented in this paper. The research material consisted of quantitative data collected on the application during the first testing phase by early adopters. The results suggest that the most frequently used features of the app were related to transport and educational activities. While women tended to split their time between...
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Rapid design of miniaturised branch-line couplers through concurrent cell optimisation and surrogate-assisted fine-tuning
PublikacjaIn this study, the authors introduce a methodology for low-cost simulation-driven design optimisation of highly miniaturised branch-line couplers (BLCs). The first stage of their design approach exploits fast concurrent optimisation of geometrically dependent, but electromagnetically isolated cells that constitute a BLC. The cross-coupling effects between the cells are taken into account in the second stage, where a surrogate-assisted...
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Application of linear buckling sensitivity analysis to economic design of cylindrical steel silos composed of corrugated sheets and columns
PublikacjaThe paper deals with global stability of steel cylindrical silos composed of corrugated walls and vertical columns with loads imposed by a bulk solid following Eurocode 1. The optimum silo design with respect to the steel weight was based on a sensitivity analysis method. The changes of silo column profiles at each design step were performed by means of influence lines for the buckling load factor due to the unit column bending...
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A biochemical multi-species quality model of a drinking water distribution system for simulation and design
PublikacjaDrinking Water Distribution Systems (DWDSs) play a key role in sustainable development of modern society. They are classified as critical infrastructure systems. This imposes a large set of highly demanding requirements on the DWDS operation and requires dedicated algorithms for on-line monitoring and control to tackle related problems. Requirements on DWDS availability restrict the usability of the real plant in the design phase....
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On Reduced-Cost Design-Oriented Constrained Surrogate Modeling of Antenna Structures
PublikacjaDesign of contemporary antenna structures heavily relies on full-wave electromagnetic (EM) simulation models. Such models are essential to ensure reliability of evaluating antenna characteristics, yet, they are computationally expensive and therefore unsuitable for handling tasks that require multiple analyses, e.g., parametric optimization. The cost issue can be alleviated by using fast surrogate models. Conventional data-driven...
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Expedited EM-Driven Design of Miniaturized Microwave Hybrid Couplers Using Surrogate-Based Optimization
PublikacjaMiniaturization of microwave hybrid couplers is important for contemporary wireless communication engineering. Using standard computer-aided design methods for development of compact structures is extremely challenging due to a general lack of computationally efficient and accurate simulation models. Poor accuracy of available equivalent circuits results from neglecting parasitic cross-couplings that greatly affect the performance...
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The significance of the underground experience: Selection of reference design cases from the underground public transport stations and interchanges of the European Union
PublikacjaAbstract Background Recent research into the way public transport users appreciate stations and interchanges has highlighted several key aspects. Importantly, the optimization of these facilities should not simply aim to resolve dissatisfiers, but should also focus on addressing satisfiers, through the incorporation of factors such as comfort and experience. ‘Soft requirements,’ which have emerged in architecture and urban design,...
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Inverse modeling for fast design optimization of small-size rat-race couplers incorporating compact cells
PublikacjaIn the paper, a framework for computationally-efficient design optimization of compact rat-race couplers (RRCs) is discussed. A class of hybrid RRCs with variable operating conditions is investigated, whose size reduction is obtained by replacing ordinary transmission lines with compact microstrip resonant cells (CMRCs). Our approach employs a bottom-up design strategy leading to the development of compact RRCs through rapid design...
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State of the Art in Open Platforms for Collaborative Urban Design and Sharing of Resources in Districts and Cities
PublikacjaThis work discusses recent developments in sharing economy concepts and collaborative co-design technology platforms applied in districts and cities. These developments are being driven both by new technological advances and by increased environmental awareness. The paper begins by outlining the state of the art in smart technology platforms for collaborative urban design, highlighting a number of recent examples. The case of peer-to-peer...
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Computer-Aided Greenery Design—Prototype Green Structure Improving Human Health in Urban Ecosystem
PublikacjaIncreasing population and urbanization, with climate change consequences, such as rising temperatures, influence public health and well-being. The search to improve the quality of life in cities becomes one of the priority objectives. A solution can be found in the role of greenery in an urban environment and its impact on human health. This opens a path toward experimentation on microclimate green structures that can be inserted...
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Design of synchronous generator two inputs regulator based on hinf control theory.
PublikacjaThe power system is highly nonlinear system, its dynamics depends on system network configuration, system loading… etc. To overcome the above mentioned difficulties and fulfill the performance requirements the different control methods are considered and tested for design of synchronous generator control system. Application of the H optimization method to synchronous generator regulator based on measurement of generator voltage...
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Healthier and Environmentally Responsible Sustainable Cities and Communities. A New Design Framework and Planning Approach for Urban Illumination
PublikacjaAlthough sustainability and sustainable development are both considered necessary practices in various fields today, a recent analysis showed that the Sustainable Development Goal SDG11: Sustainable Cities and Communities established by the United Nations does not address urban illumination and its impact. This oversight is of concern because research carried out in the last 20+ years indicates artificial light at night (ALAN)...
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A design framework and a digital toolset supporting the early-stage explorations of responsive kinetic building skin concepts
PublikacjaIn this paper we present the first phase of our research on the development of a framework for early-stage responsive kinetic building skin design. The aims of this study were: to formulate a methodological and instrumental basis for the construction of the framework, to conduct an initial pre-assessment of its features, and finally to provide the first example of how the framework could be applied in practice. Importantly, at...
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Knowledge-Based Expedited Parameter Tuning of Microwave Passives by Means of Design Requirement Management and Variable-Resolution EM Simulations
PublikacjaThe importance of numerical optimization techniques has been continually growing in the design of microwave components over the recent years. Although reasonable initial designs can be obtained using circuit theory tools, precise parameter tuning is still necessary to account for effects such as electromagnetic (EM) cross coupling or radiation losses. EM-driven design closure is most often realized using gradient-based procedures,...
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Adaptabilność obiektów architektonicznych we współczesnym projektowaniu / The adaptability of architectural objects in contemporary design
PublikacjaThe article discusses the issue of adaptability - the ability to modify modern architectural objects to a changing context - as an important element of contemporary design. Adaptability can take on different forms. It is most commonly understood as a change in the architectural form in reaction to various stimuli from the environment through transformative structures, or as an object's ability to adapt to climatic conditions, providing...
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Design-oriented modeling of antenna structures by means of two-level kriging with explicit dimensionality reduction
PublikacjaThe employment of full-wave electromagnetic (EM) analysis is a practical necessity in the design of contemporary antenna structures. This is because simpler models are generally not available or of limited accuracy. At the same time, EM-based design is computationally expensive. Consequently, the ways of accelerating tasks such as parametric optimization or uncertainty quantification have to be sought. A possible workaround that...
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Accelerated Re-Design of Antenna Structures Using Sensitivity-Based Inverse Surrogates
PublikacjaThe paper proposes a novel framework for accelerated re-design (dimension scaling) of antenna structures using inverse surrogates. The major contribution of the work is a sensitivity-based model identification procedure, which permits a significant reduction of the number of reference designs required to render the surrogate. Rigorous formulation of the approach is supplemented by its comprehensive numerical validation using a...
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Accelerated simulation-driven design optimisation of compact couplers by means of two-level space mapping
PublikacjaIn this study, the authors discuss a robust and efficient technique for rapid design of compact couplers. The approach exploits two-level space mapping (SM) correction of an equivalent circuit model of the coupler structure under design. The first SM layer (local correction) is utilised to ensure good matching between the equivalent circuit and the electromagnetic model at the component level. Subsequent global correction allows...
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Model Correction and Optimization Framework for Expedited EM-Driven Surrogate-Assisted Design of Compact Antennas
PublikacjaDesign of compact antennas is a numerically challenging process that heavily relies on electromagnetic (EM) simulations and numerical optimization algorithms. For reliability of simulation results, EM models of small radiators often include connectors which—despite being components with fixed dimensions—significantly contribute to evaluation cost. In this letter, a response correction method for antenna models without connector,...
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Design of a test bench for determining the general characteristics of an internal combustion engine using a hydraulic power take-off system
PublikacjaThe paper presents a design of an engine test bench, which is used to determine the general characteristics of a truck engine using a power take-off (PTO). PTO drives a hydraulic system that generates a load on the engine at various points in its operation in the power range specified by the hydraulic system. The design allows for stationary and mobile tests with the test bench mounted on the truck, without any modification of...
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Preparation and photocatalytic properties of BaZrO 3 and SrZrO 3 modified with Cu 2 O/Bi 2 O 3 quantum dots
PublikacjaIn this study, we report a novel method of BaZrO3 and SrZrO3 surface modification by two different types of quantum dots (QDs, Cu2O and Bi2O3), which improved the photocatalytic performance of the obtained materials under UV-Vis light irradiation. Pristine BaZrO3 and SrZrO3 were prepared by the hydrothermal method. The deposition of Cu2O- and Bi2O3-QDs was carried out by chemical reduction. The morphology of the nanoparticles was...
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Reply to “Enrichment of Bi-Be-Mo-Cd-Pb-Nb-Ga, REEs and Y in the Permian coals of the Huainan Coalfield, Anhui, China: Discussion”
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Wpływ procesu redukcji na właściwości strukturalne i mechaniczne szkieł tlenkowych z grupy (Pb,Bi)-(Si,Ge)-O
PublikacjaW pracy zbadano wpływ procesu redukcji w wodorze prowadzonej w temperaturze 380°C na mikrostrukturę i skład pierwiastkowy próbki szkła Bi0.4Pb0.2Si0.4Ox. Wykazano, że na skutek redukcji w próbce tworzy się wyraźnie odseparowana wierzchnia warstwa o grubości ok. 50µm, która jest zubożona w tlen i charakteryzuje się lepszą przewodnością elektryczną. Stwierdzono również, że na powierzchni szkła tworzą się granule metalicznego bizmutu...
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Techno‐economic evaluation of a natural deep eutectic solvent‐based biorefinery: Exploring different design scenarios
PublikacjaThis paper presents a comprehensive techno‐economic evaluation of an integrated natural deep eutectic solvent (NADES)‐based biorefinery – a 1 ton day−1 capacity design plant. The key parameters include payback period, net present value (NPV), and internal rate of return (IRR). These were compared with the parameters of conventional biorefineries. The ‘n th plant’ results clearly revealed that the single product‐based biorefinery...
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Kriging-assisted hybrid reliability design and optimization of offshore wind turbine support structure based on a portfolio allocation strategy
PublikacjaIn recent years, offshore wind power generation technology has developed rapidly around the world, making important contributions to the further development of renewable energy. When designing an Offshore Wind Turbine (OWT) system, the uncertainties in parameters and different types of constraints need to be considered to find the optimal design of these systems. Therefore, the Reliability-Based Design Optimization (RBDO) method...
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Winding function approach based design of novel five-phase brushless doubly fed induction generator
PublikacjaThe paper presents the concept of the new design of the five-phase brushless doubly fed induction generator. The generator is dedicated to the modern wind turbine. The innovative design approach uses a five-phase power supply from the stator control winding side of the generator with a stator three-phase classic power winding. The research results presented indicate that the electromagnetic coupling between the control and power...
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Polyether-block-amide PEBA membranes for gas separation and pervaporation; current design and applications
PublikacjaPolyether-block-amide (PEBA) membranes have attracted considerable attention for their exceptional efficacy in gas separation and pervaporation processes. This comprehensive review delves into the precise definition, distinguishing characteristics, and diverse applications of PEBA membranes over the past five years. A primary research objective focuses on enhancing gas separation efficiency, primarily through augmenting membrane...