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The main contribution of this paper is to highlight a new work regime of an optimised organic field effect transistor (OFET) respectively volume channel mode. If the device comprises a vertical n+p junction on insulator, the longitudinal conduction can be deviated by two gates. The carriers rejection from surface deep into the volume is limited by the metallurgical junction, via the top, bottom gates...
The main feature of type-2 fuzzy sets is their ability to represent uncertainties within a system. These uncertainties are captured in the Footprint Of Uncertainty (FOU) of a type2 membership function which can be described by the upper and the lower membership function. One of the challenges in modelling a type-2 fuzzy logic system is the problem of defining the membership function parameters and...
In the last few decades a lot of good papers have been published proposing techniques for optimizing energy management on-board hybrid vehicles. However the large majority of them focused on specific architectures, and suggested algorithms valid just for them. This paper, on the contrary, performs a very basic analysis, in which hybrid vehicles are modelled in idealized way and the effects of the...
This paper presents a model of battery powered electric vehicle with computer algorithm for calculation of optimal energy components. The goal of the research was to create a system which can optimize the vehicle battery and motor for the given driving cycle thus minimizing equipment expenses. Furthermore, paper describes tested vehicle, vehicle components modelling, measurement acquisition process,...
Acoustic noise emission of transformers is mainly due to core vibration induced by reluctance force and magnetostriction which is highly dependent on the core material and geometry. This paper investigates the vibration and acoustic noise of nanocrystalline cores with different geometric shapes based on FEM simulation and experimental measurements. Furthermore, the optimal design of medium frequency...
It is often believed that a "race-to-finish" approach, where processing is finished quickly, is the best way to conserve energy on modern mobile architectures. However, from earlier work we know that for continuous multimedia workloads, the best way to conserve energy is to minimise processor frequency such that application deadlines are met. In this paper, we investigate the reasons behind...
During locomotion, Autonomous Ground Vehicles (AGV) need to map the surface of the ground ahead in order to plan a safe route of passage. Algorithms that achieve this are all derived from a basic requirement to track pixels between successive frames. This paper establishes the effect of tracking error on depth estimation with different image-plane geometries and presents an argument for tight control...
Testing of safety-critical embedded systems is an important and costly endeavor. To date researchers and practitioners have been mainly focusing on the design and application of diverse testing strategies, but leaving the test stopping criteria as an ad hoc decision and an open research issue. In our previous work, we proposed a convergence algorithm that informs the tester when the current testing...
This paper presents a series of further modifications to the parallel algorithm used for finding digraphs realisations of the characteristic polynomial. What distinguishes the mentioned algorithm from other state-of-the-art solutions is the ability to find a complete set of existing solutions, not just a few of them. Moreover, solutions found tend to be minimal in terms of a rank of matrices created...
This paper proposes to revisit the 2-D Variational Mode Decomposition (2-D-VMD) in order to separate the incident and reflected waves in experimental images of internal waves velocity field. 2-D-VMD aims at splitting an image into a sequence of oscillating components which are centered around specific spatial frequencies. In this work we develop a proximal algorithm with local convergence guarantees,...
Kinetic systems form a wide nonlinear system class with good descriptive power that can efficiently be used for the dynamical modeling of non-negative models emerging not only in (bio)chemistry but in other important scientific and engineering fields as well. The directed graph structure assigned to kinetic models give us important information about the qualitative dynamical properties of the system...
Multi-tenant service-based systems (SBSs) have become a major paradigm in software engineering in the cloud environment. Instead of serving a single end-user, a multitenant SBS provides multiple tenants with similar and yet customised functionalities with potentially different quality-of service (QoS) values. Thus, existing approaches to service selection for single-tenant SBSs are no longer suitable...
Helicopter has significant attributes as compared to its aircraft counterparts due to its capability to hover around smaller space. This advantage is very useful during air-sea mission, surveillance and disaster monitoring. However, it comes with a price where the system exhibits not only increased in sensitivity to control inputs and disturbances but also a much higher dynamics. A pitch angle control...
This paper proposes an algorithm for real-time clock synchronisation in underwater acoustic networks. The algorithm models modem clocks as linear functions and embeds the data necessary for the clock synchronisation procedure as time stamps that can be communicated in the payload of later messages and only when necessary, hence limiting the communication overhead. The proposed solution takes explicitly...
Achieving the required onboard serviceability of safety equipment at minimum cost is of interest to airlines. This paper addresses the integration of radio frequency identification (RFID) technology into aircraft maintenance programs to improve the economics of safety equipment inspections. A problem that airlines face, which is addressed in this article, is how to determine the frequency of scheduled...
The conditioning technique has been conceived and must always be considered as an a posteriori anti-windup method (the a priori knowledge of the non-linearity acting on the desired control variable has not to be known, provided a post-measurement of the actual control variable is furnished). And in this sense this kind of "backward" anti-windup should always be used because it is never possible...
The present paper deals with the path planning of a mobile object and optimisation of the locally generated safe path. It proposes a trajectory generation algorithm using fuzzy logic controllers in both directions propagation and obstacles avoidance. Associated with a workspace modelling, the algorithm tries to obtain a quasi-optimal global safe path for an autonomous mobile object which has to move...
This paper addresses the performance evaluation and optimisation of failure-prone manufacturing systems. For this purpose, we propose a fluid stochastic event graph model that is a decision-free Petri net and can be used to model transfer lines, kanban systems, etc. In this model, tokens are considered as continuous flows. A transition can be in operating state or in failure state. A transition in...
Optimisation during the design of large manufacturing systems is a key issue. An adequate modelling formalism to express the intricate interleaving of competition and cooperation relationships is needed first. Moreover, robust and efficient optimisation techniques are necessary. This paper presents an integrated tool for the automated optimisation of DEDS, with application to manufacturing systems...
This paper describes the strategy of the non-linear model predictive control (NMPC) to the thermal control of a batch or semi — batch chemical reactor equipped with a multi — fluid heating/cooling system. The application of non-linear model predictive control is based on an open-loop constrained optimisation problem solved repeatedly on-line by a sequential optimisation and solution strategy on a...
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