Measurement and identification of pneumatic tyre parameters

This report deals with the measurement and identification of important parameters of various tyre models. Being a necessary step in the process of tyre related simulations, tyre testing is an important subject. In particular, making the test procedure simpler, more efficient and test results more accurate is what explored the most. For this project, after extensive studies on tyre modelling and testing, two problems were chosen to tackle. The first problem is tyre structural parameter identification being too difficult to carry out and time consuming, tyre modal testing in particular. The second problem is the usage of simple tyre models is limited due to they are normally parameterized on expensive professional tyre testing machines which are not commonly found in normal labs. In this study, it focuses on the identification of longitudinal relaxation length. In order to deal with the first problem, a convenient and effective approach of extracting tyre modal parameters is established. Compared with the conventional multi-degree curve fitting method, this new developed approach improves the efficiency and simplifies the curve fitting process dramatically while still maintaining adequate accuracy. In terms of solving the second problem, the development of a tyre relaxation length test is initiated. Virtual simulations using Matlab/Simulink have been carried out which has verified its principle. Feasibility, equipment design and the proposed test procedure of the practical test will also be discussed

Surface characterization, mechanical properties and corrosion behaviour of ternary based ZneZnOeSiO2composite coating of mild steel

Zinc coatings are obtained either from cyanide, non-cyanide alkaline or acid solutions. Because of the pollution and high cost associated with cyanide, deposition from other baths is gaining importance. In order to develop a bath with additive that could produce a quality coating is the motivation behind this present work which is surface modification of Zne8ZnOeSiO2 nano composite coating on mild steel surface by electrodeposition route. The influence of SiO2 on Zne8ZnO sulphate electrolyte on the properties and microstructure of the produced nano-coatings were investigated. The SiO2 was varied from 0 to 16wt%. The microstructure characteristics of these produced series composites coating were investigated using scanning electron microscopy couple with energy dispersive spectroscopy (SEM/EDS), X-ray diffraction and atomic force microscopy (AFM). The corrosion degradation properties in 3.65% NaCl medium were studied using potentiodynamic polarization technique and characterized by high resolution optical microscope (HR-OPM). The hardness and wear of the composite coating were measured with high diamond microhardness tester and dry abrasive MTR-300 testers respectively. The results showed that average hardness value of 142.5 and 251.2HV and corrosion rate of 0.13088 and 0.00122 mm/yr were obtained for the 0 and 16wt% SiO2 in Zne8ZnO. The work have established that upto 16% SiO2 in Zne8ZnO composite coating on mild steel can be used in improving the microhardness, wear loss and corrosion resistance of mild stee

Enhanced Activity for CO Oxidation over WO₃ Nanolamella Supported Pt Catalyst

WO₃ nanolamella supported Pt catalyst has been prepared and applied for CO oxidation in this work. A significantly enhanced activity has been achieved, compared to that of the Pt catalyst supported by the WO₃ nanoparticle. The catalyst characterization using X-ray diffraction (XRD), scanning electronic microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and N₂ adsorption–desorption confirms that the WO₃ nanolamella supported Pt catalyst possesses higher Pt dispersion, improved metal–support interaction with a higher electron density of Pt, and a weak adsorption of CO, leading to the significantly enhanced activity for CO oxidation

Realizing Tunable Evolution of Bound States in the Continuum and Circularly Polarized Points by Symmetry Breaking

Bound states in the continuum (BICs) and circularly polarized points (C points), being well-known momentum-space polarization singularities in photonic crystal (PhC) slabs, have attracted much attention due to their novel properties. The further investigations on the generation and evolution of BICs and C points in momentum space have provided more perspectives to modulate these polarization singularities by tuning parameters. Recently, it was theoretically proposed that starting from a high-order BIC, various tunable evolutions of BICs and C points could be realized by symmetry breaking, offering an effective method to create and modulate polarization singularities in momentum space. To date, there is still no experimental realization of tunable evolution of polarization singularities from a high-order BIC. Here, we experimentally realized tunable evolution of BICs and C points in momentum space by symmetry breaking on purpose. The studied high-order BIC of −2 charge exists in a PhC slab of C6 symmetry. The off-Γ BICs of −1 charge were observed by breaking the C6 symmetry to the C2 symmetry. The at-Γ BIC of +1 charge and off-Γ C points of −12 charge were observed by breaking the C6 symmetry to the C3 symmetry. The symmetry breaking factors and unit-cell configurations were further applied to continuously modulate the movement of polarization singularities in momentum space. Our results can promote the understanding of polarization singularities’ evolution and provide effective approaches of symmetry breaking to on-purpose design BICs and C points in momentum space

Statistic box-plots of registration results in terms of NC and NMI.

<p>(a) NC parameters for box-plots. (b) NMI parameters for box-plots. In CT image registration cases, these methods are represented by appending a suffix 1 (e.g. Global1) to the name abbreviations, while in MRI image cases, the suffix 2 is added to their name abbreviations (e.g. Global2).</p

Design and Fabrication of a Renewable and Highly Transparent Multilayer Coating on Poly(lactic acid) Film Capable of UV-Shielding and Antifogging

A new and highly transparent multilayer coating on poly­(lactic acid) (PLA) film has been designed and constructed based on the layer-by-layer assembly of green and renewable hydroxypropyl methylcellulose (HPMC) and tannic acid (TA). The surface chemical structure, thickness, and morphology analyses of the multilayer coating confirm that HPMC and TA are successfully incorporated based on the hydrogen-bonding interaction. The resultant coated PLA film presents excellent UV-shielding and antifogging properties, which shows strong dependency on the number of assembly cycles. Although the tensile mechanical property of coated PLA film shows a decrease, the thermal property of the PLA substrate remained. This work provides a simple but effective pathway to design and fabricate highly transparent and environmentally friendly coating for the UV-shielding and antifogging applications

Design and Fabrication of a Renewable and Highly Transparent Multilayer Coating on Poly(lactic acid) Film Capable of UV-Shielding and Antifogging

A new and highly transparent multilayer coating on poly­(lactic acid) (PLA) film has been designed and constructed based on the layer-by-layer assembly of green and renewable hydroxypropyl methylcellulose (HPMC) and tannic acid (TA). The surface chemical structure, thickness, and morphology analyses of the multilayer coating confirm that HPMC and TA are successfully incorporated based on the hydrogen-bonding interaction. The resultant coated PLA film presents excellent UV-shielding and antifogging properties, which shows strong dependency on the number of assembly cycles. Although the tensile mechanical property of coated PLA film shows a decrease, the thermal property of the PLA substrate remained. This work provides a simple but effective pathway to design and fabricate highly transparent and environmentally friendly coating for the UV-shielding and antifogging applications

Design and Fabrication of a Renewable and Highly Transparent Multilayer Coating on Poly(lactic acid) Film Capable of UV-Shielding and Antifogging

A new and highly transparent multilayer coating on poly­(lactic acid) (PLA) film has been designed and constructed based on the layer-by-layer assembly of green and renewable hydroxypropyl methylcellulose (HPMC) and tannic acid (TA). The surface chemical structure, thickness, and morphology analyses of the multilayer coating confirm that HPMC and TA are successfully incorporated based on the hydrogen-bonding interaction. The resultant coated PLA film presents excellent UV-shielding and antifogging properties, which shows strong dependency on the number of assembly cycles. Although the tensile mechanical property of coated PLA film shows a decrease, the thermal property of the PLA substrate remained. This work provides a simple but effective pathway to design and fabricate highly transparent and environmentally friendly coating for the UV-shielding and antifogging applications

The component diagram of governing equations for LFEM, DFEM and NFEM.

<p>The component diagram of governing equations for LFEM, DFEM and NFEM.</p

Medical images examples for method evaluation.

<p>(a) reference image of chest CT image pairs,(b) floating image of chest CT image pairs, (c) reference image of brain MR image pairs, (d) floating image of brain MR image pairs.</p