An optimised illumination system / Azzedine Hammiche (1983)

Public ISBD Titre : An optimised illumination system Type de document : texte imprimé Auteurs : Azzedine Hammiche, Auteur ; M. Nixon, Directeur de thèse Editeur : Southampton : University of Southampton Année de publication : 1983 Importance : 45 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Électronique : Royaume-Uni, University of Southampton : 1983 Annexe f. 46 - 62 . Bibliogr. f. 63 - 64 Langues : Anglais (eng) Mots-clés : Digital image Illumination system Software development Index. décimale : Ms01183 Résumé : Proper illumination of an object is of great importance to scene analysis using the techniques of image processing. This thesis describes the design and development of a microprocessor controlled illumination system to be used with an image processing system. The system consists of four channels. Each channel controls the illumination provided by one lamp. It includes four feedback channels also which provide the microprocessor with information on the actual illumination at four points around an object. Software to control the illumination was developed using the BCPL Language. An optimised illumination system [texte imprimé] / Azzedine Hammiche, Auteur ; M. Nixon, Directeur de thèse . - Southampton : University of Southampton, 1983 . - 45 f. : ill. ; 30 cm. Mémoire de Master : Électronique : Royaume-Uni, University of Southampton : 1983 Annexe f. 46 - 62 . Bibliogr. f. 63 - 64 Langues : Anglais (eng) Mots-clés : Digital image Illumination system Software development Index. décimale : Ms01183 Résumé : Proper illumination of an object is of great importance to scene analysis using the techniques of image processing. This thesis describes the design and development of a microprocessor controlled illumination system to be used with an image processing system. The system consists of four channels. Each channel controls the illumination provided by one lamp. It includes four feedback channels also which provide the microprocessor with information on the actual illumination at four points around an object. Software to control the illumination was developed using the BCPL Language.

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
Ms01183	Ms01183	Papier	Bibliothèque centrale	Mémoire de Master	Disponible

Interaction of strip footings on elastic foundations / Bachir Achour (1984) 

Public ISBD Titre : Interaction of strip footings on elastic foundations Type de document : texte imprimé Auteurs : Bachir Achour, Auteur ; N. C. Last, Directeur de thèse Editeur : Southampton : University of Southampton Année de publication : 1984 Importance : 126 f. Présentation : ill. Format : 30 cm. Note générale : Mémoire de Master : Civil Engineering : Southampton, University of Southampton : 1984 Mémoire de Master en Génie Civil Bibliogr. f. 60. - Annexes f. 61-126 Langues : Anglais (eng) Mots-clés : Shear stress Elastic displacements Footings Index. décimale : Ms01084 Résumé : This work was carried out in order to compare the behaviour of double footings at different spacings. For this purpose, many programmes were written to compute stresses and displacements at different points in the medium. To aid the investigation, contours of stresses and displacements were drawn. Some results were compared with available analytical solutions to prove that the programmes were working correctly. It was found that when the spacing is equal to ᴮ/₂, the double footing seemed to behave as a single one, particularly in the rigid case. The comparison was made by assuming the shear modulus (G) and the loading (p) both equal to unity, and the Poisson's ratio equals to one-half. Due to the problems of modelling theoretically infinite stresses at the edges of a rigid footing, an approximate method was used. In practice, soils will yield under high stresses, and therefore the edge stresses were limited by the cohesive shear strength of the material. Interaction of strip footings on elastic foundations [texte imprimé] / Bachir Achour, Auteur ; N. C. Last, Directeur de thèse . - Southampton : University of Southampton, 1984 . - 126 f. : ill. ; 30 cm. Mémoire de Master : Civil Engineering : Southampton, University of Southampton : 1984 Mémoire de Master en Génie Civil Bibliogr. f. 60. - Annexes f. 61-126 Langues : Anglais (eng) Mots-clés : Shear stress Elastic displacements Footings Index. décimale : Ms01084 Résumé : This work was carried out in order to compare the behaviour of double footings at different spacings. For this purpose, many programmes were written to compute stresses and displacements at different points in the medium. To aid the investigation, contours of stresses and displacements were drawn. Some results were compared with available analytical solutions to prove that the programmes were working correctly. It was found that when the spacing is equal to ᴮ/₂, the double footing seemed to behave as a single one, particularly in the rigid case. The comparison was made by assuming the shear modulus (G) and the loading (p) both equal to unity, and the Poisson's ratio equals to one-half. Due to the problems of modelling theoretically infinite stresses at the edges of a rigid footing, an approximate method was used. In practice, soils will yield under high stresses, and therefore the edge stresses were limited by the cohesive shear strength of the material.

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
Ms01084	Ms01084	Papier + ressource électronique	Bibliothèque Annexe	Mémoire de Master	Disponible	Genie_civil	Consultation sur place/Téléchargeable

Documents numériques

ACHOUR.B.pdf URL

The mixing of liquid propane and liquid normal butane at one atmosphere / Ahmed Tchikou (1986) 

Public ISBD Titre : The mixing of liquid propane and liquid normal butane at one atmosphere Type de document : texte imprimé Auteurs : Ahmed Tchikou, Auteur ; R. G. Scurlock, Directeur de thèse Editeur : Southampton : University of Southampton Année de publication : 1986 Importance : 148 f. Présentation : ill. Format : 27 cm. Note générale : Thèse de Doctorat : Philosophy : Angleterre, University of Southampton : 1986 Bibliogr. f. 149 - 153 . - Annexe f. 154 - 175 Langues : Anglais (eng) Mots-clés : Propane-rich liquids n-butane-rich liquids Vapour generated Boiling liquid gases Index. décimale : D003586 Résumé : The mixing of propane, or propane-rich liquids, with n-butane, or n-butane-rich liquids, under 1 atm. pressure in fully refrigerated vessels is widely practised in the liquefied petroleum gas (L.P.G.) industry. A common experience during these mixing operations is that the volume of vapour generated depends on whether the propane is added to the n-butane or vice versa. In general, about twice as much vapour is generated when a propane/n-butane mixture is produced by adding propane to n-butane compared with adding n-butane to propane. This work describes: A/ A rig developed for the mixing of two boiling liquid gases at 1 Atm. B/ Some experimental mixing results carried out on a laboratory scale which demonstrate that the phenomenon is not an artefact. The results obtained showed that: 1. The vapour contains some n-butane. 2. When propane is added to n-butane, with surface and bottom delivery, the boil-off is affected by the delivery rate. 3. When adding propane to n-butane, the volume of vapour evolved is between 1.5 and 2.0 times the volume produced by adding n-butane to propane to produce the same mixture. 4. The volumes of vapour generated are larger when the pure components are mixed. C/ A path-dependent mixing model is developed which predicts the vapour volume generated within the experimental error. The model decouples the vapour generation and liquid mixing processes, and indicates how C₃/n-c₄ mixing generates much larger volumes of vapour than a n-C₄/C₃ mixing operation. The mixing of liquid propane and liquid normal butane at one atmosphere [texte imprimé] / Ahmed Tchikou, Auteur ; R. G. Scurlock, Directeur de thèse . - Southampton : University of Southampton, 1986 . - 148 f. : ill. ; 27 cm. Thèse de Doctorat : Philosophy : Angleterre, University of Southampton : 1986 Bibliogr. f. 149 - 153 . - Annexe f. 154 - 175 Langues : Anglais (eng) Mots-clés : Propane-rich liquids n-butane-rich liquids Vapour generated Boiling liquid gases Index. décimale : D003586 Résumé : The mixing of propane, or propane-rich liquids, with n-butane, or n-butane-rich liquids, under 1 atm. pressure in fully refrigerated vessels is widely practised in the liquefied petroleum gas (L.P.G.) industry. A common experience during these mixing operations is that the volume of vapour generated depends on whether the propane is added to the n-butane or vice versa. In general, about twice as much vapour is generated when a propane/n-butane mixture is produced by adding propane to n-butane compared with adding n-butane to propane. This work describes: A/ A rig developed for the mixing of two boiling liquid gases at 1 Atm. B/ Some experimental mixing results carried out on a laboratory scale which demonstrate that the phenomenon is not an artefact. The results obtained showed that: 1. The vapour contains some n-butane. 2. When propane is added to n-butane, with surface and bottom delivery, the boil-off is affected by the delivery rate. 3. When adding propane to n-butane, the volume of vapour evolved is between 1.5 and 2.0 times the volume produced by adding n-butane to propane to produce the same mixture. 4. The volumes of vapour generated are larger when the pure components are mixed. C/ A path-dependent mixing model is developed which predicts the vapour volume generated within the experimental error. The model decouples the vapour generation and liquid mixing processes, and indicates how C₃/n-c₄ mixing generates much larger volumes of vapour than a n-C₄/C₃ mixing operation.

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
D003586	D003586	Papier + ressource électronique	Bibliothèque Annexe	Thèse de Doctorat	Disponible	Autre	Consultation sur place/Téléchargeable

Documents numériques

TCHIKOU.Ahmed.pdf URL

The solubility of water in cryogenic liquids and the related effects / Rachid Rebiai (1985) 

Public ISBD Titre : The solubility of water in cryogenic liquids and the related effects Type de document : texte imprimé Auteurs : Rachid Rebiai, Auteur ; R. G. Scurlock, Directeur de thèse Editeur : Southampton : University of Southampton Année de publication : 1985 Importance : Mult. Présentation : ill. Format : 27 cm. Note générale : Thèse de Doctorat : Philosophy : Royaume-Uni, University of Southampton : 1985 Bibliogr. [9] f. - Annexe [40] f Langues : Anglais (eng) Mots-clés : Water solubility Cryogenic solvents Gas chromatography Schlieren photography Fourier transform Infra-red spectroscopy Micro-thermometry Index. décimale : D005385 Résumé : The solubility of water and the related temperature profiles across the liquid/vapour interface, ware measured in LIN, LOX, LAr, LCH4, and LNG at the boiling point of the liquid and one atmospheric pressure. The designs of an infra-red solution cell for low temperature use and a fast response micro-thermocouple (25µm diameter) with a sensitive junction of approximately 15µm length, are provided. The data presented, were obtained from a series of measurements in cryogenic liquids mentioned above and were based on the following analytical techniques: infra-red spectroscopy, gas chromatography, micro-thermometry and Schlieren photography. The findings from our experiments and the methods used are discussed in relation to the prevention of evaporation instability. The systems that have been studied include pure and contaminated LIN, contaminated LOX, condensed high purity argon and methane gases and condensed technical grade natural gas, at the normal boiling point. Using high resolution Fourier transform infra-red spectrometer and gas chromatograph, we have discovered that water dissolves in all cryogenic solutions mentioned above. The measured solubility is much larger (10⁻⁵ mole fraction) than predicted by normal theories of solutions which is 10⁻²⁰ mole fraction. A fast response micro-thermocouple has been used to measure the temperature profile across the liquide/vapour interface as a function of the heat flux and an experimental correlation for five different cryogenic liquids was obtained between the modified mass flux m* and the superheat ΔT for ΔT up to 7K. Finally, schlieren photography technique has been used which reveals the complex cellular convective flow in the liquid surface region during the normal evaporation of cryogenic liquids. The solubility of water in cryogenic liquids and the related effects [texte imprimé] / Rachid Rebiai, Auteur ; R. G. Scurlock, Directeur de thèse . - Southampton : University of Southampton, 1985 . - Mult. : ill. ; 27 cm. Thèse de Doctorat : Philosophy : Royaume-Uni, University of Southampton : 1985 Bibliogr. [9] f. - Annexe [40] f Langues : Anglais (eng) Mots-clés : Water solubility Cryogenic solvents Gas chromatography Schlieren photography Fourier transform Infra-red spectroscopy Micro-thermometry Index. décimale : D005385 Résumé : The solubility of water and the related temperature profiles across the liquid/vapour interface, ware measured in LIN, LOX, LAr, LCH4, and LNG at the boiling point of the liquid and one atmospheric pressure. The designs of an infra-red solution cell for low temperature use and a fast response micro-thermocouple (25µm diameter) with a sensitive junction of approximately 15µm length, are provided. The data presented, were obtained from a series of measurements in cryogenic liquids mentioned above and were based on the following analytical techniques: infra-red spectroscopy, gas chromatography, micro-thermometry and Schlieren photography. The findings from our experiments and the methods used are discussed in relation to the prevention of evaporation instability. The systems that have been studied include pure and contaminated LIN, contaminated LOX, condensed high purity argon and methane gases and condensed technical grade natural gas, at the normal boiling point. Using high resolution Fourier transform infra-red spectrometer and gas chromatograph, we have discovered that water dissolves in all cryogenic solutions mentioned above. The measured solubility is much larger (10⁻⁵ mole fraction) than predicted by normal theories of solutions which is 10⁻²⁰ mole fraction. A fast response micro-thermocouple has been used to measure the temperature profile across the liquide/vapour interface as a function of the heat flux and an experimental correlation for five different cryogenic liquids was obtained between the modified mass flux m* and the superheat ΔT for ΔT up to 7K. Finally, schlieren photography technique has been used which reveals the complex cellular convective flow in the liquid surface region during the normal evaporation of cryogenic liquids.

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité	Spécialité	Etat_Exemplaire
D005385	D005385	Papier + ressource électronique	Bibliothèque Annexe	Thèse de Doctorat	Disponible	Autre	Consultation sur place/Téléchargeable

Documents numériques

REBIAI.Rachid.pdf URL