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1 – 2 of 2Peiqing Li, Taiping Yang, Hao Zhang, Lijun Wang and Qipeng Li
This paper aimed a fractional-order sliding mode-based lateral lane-change control method that was proposed to improve the path-tracking accuracy of vehicle lateral motion.
Abstract
Purpose
This paper aimed a fractional-order sliding mode-based lateral lane-change control method that was proposed to improve the path-tracking accuracy of vehicle lateral motion.
Design/methodology/approach
In this paper the vehicle presighting and kinematic models were established, and a new sliding mode control isokinetic convergence law was devised based on the fractional order calculus to make the front wheel turning angle approach the desired value quickly. On this basis, a fractional gradient descent algorithm was proposed to adjust the radial basis function (RBF) neuron parameter update rules to improve the compensation speed of the neural network.
Findings
The simulation results revealed that, compared to the traditional sliding mode control strategy, the designed controller eliminated the jitter of the sliding mode control, sped up the response of the controller, reduced the overshoot of the system parameters and facilitated accurate and fast tracking of the desired path when the vehicle changed lanes at low speeds.
Originality/value
This paper combines the idea of fractional order calculus with gradient descent algorithm, proposed a fractional-order gradient descent method applied to RBF neural network and fast adjustment the position and width of neurons.
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Keywords
Mauro Paoloni, Giorgia Mattei, Niccolò Paoloni and Giuseppe Modaffari
This paper aims to analyse the roles of relational capital (RC) and knowledge management (KM) during the COVID-19 in Italian public and private hospitals, considering that…
Abstract
Purpose
This paper aims to analyse the roles of relational capital (RC) and knowledge management (KM) during the COVID-19 in Italian public and private hospitals, considering that intangible elements are essential during periods of uncertainty.
Design/methodology/approach
Authors used a qualitative design in a case study on two Italian hospitals that have different ownership structures, which are located in the epicentre of the pandemic in Lombardy. The study was carried out using the CAOS (“caratteristiche personali”, “ambiente”, “organizzazione” and “start-up”) model (Paoloni, 2021), which allows for comprehending and commenting on RC because of the connections between typical factors that influence an organisation. The model also allows for discussion of the use of a network and how it supports organisations.
Findings
Findings of the analysis showed that during the management of the COVID-19 health emergency, ownership structure was not a discriminating factor, the created relationships were similar and they were considered in the same way. The relationships were mainly formal (except for contributions by associations or individuals) and temporary. The RC's reactive role in overcoming crises was confirmed, and the findings indicated that this result was possible also, thanks to the KM's role played within the organisation.
Originality/value
Theoretical implications of the work are that it contributes to the sparse healthcare literature on intellectual capital (IC) and on RC and its relationships with KM. The practical implications are related to the creation of new relationships during the healthcare emergency between hospitals and the central government, which can be considered a useful lesson for the future. The theoretical implications derived from the analysis are generalisable to all organisations regardless of their type and location, as well as the practical implications are applicable to the entire national territory.
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