by Chan Chun-sing, Colin. / Bibliography: leaf [36] / Thesis (M.B.A.)--Chinese University of Hong Kong, 1985

Certain applications have recently appeared in industry where a traditional bar code printed on a label will not survive because the item to be tracked has to be exposed to harsh environments. Laser direct-part marking is a manufacturing process used to create permanent marks on a substrate that could help to alleviate this problem. In this research, a 532 nm laser was utilized to create a direct-part marked Data Matrix symbol onto carbon steel substrates with different carbon content. The quality of the laser marked Data Matrix symbol was then evaluated according to the criteria outlined in the ISO/IEC 16022 bar code technology specification for Data Matrix. Several experiments were conducted to explore the effects that different parameters have on the quality of the laser direct-part marked symbols. First, an experiment was conducted to investigate the effect of two different laser tool path patterns. In later experiments, parameters such as type of carbon steel, percent of laser tool path overlap, profile speed, average power and frequency were found to have significant effects on the quality of laser direct-part marked Data Matrix symbols. The analysis of the results indicated that contrast and print growth were the critical standard performance measures that limited laser direct-part marked Data Matrix symbols from achieving a higher final grade. No significant effects were found with respect to other standard performance measures (i.e., encode, axial uniformity, and unused error correction). Next, the experimental data collected for contrast and print growth was utilized as training, validation and testing data sets in the modeling of artificial neural networks for the laser direct-part marking process. Two performance measures (i.e., mean squared error and correlation coefficient) were employed to assess the performance of the artificial neural network models. Single-output artificial neural network models corresponding to a specific performance measure were found to have good learning and predicting capabilities. The single-output artificial neural network models were compared to equivalent multiple linear regression models for validation purposes. The prediction capability of the single-output artificial neural network models with respect to laser direct-part marking of Data Matrix symbols on carbon steel substrates was superior to that of the multiple linear regression models. / Graduation date: 2004

Thesis (M. Sc.)--University of Hong Kong, 1978.

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Darbe analizuojamos statybinės įrangos remonto darbų organizavimo problemos. Teorinėje darbo dalyje apžvelgta valdymo teorijų vystimosi aspektai, naujos valdymo teorijos. Apžvelgiamos statybinės įrangos darbų Lietuvoje vertinimas. Praktinėje darbo dalyje apžvelgta įmonės „CRAMAS“ statybinės įrangos remonto darbų organizavimo analizė. Pateikiamos išvados ir rekomendacijos. Darbo tikslas – išanalizuoti statybinės įrangos remonto darbų organizavimą. Tyrimui atlikti iškelti uždaviniai: atlikti įmonės darbuotojų tyrimą, išanalizuoti statybinės įrangos remonto darbų organizavimą, apibendrinti tyrimo rezultatus ir pateikti pasiūlymus. Darbe naudotasi tyrimo metodais: mokslinės literatūros analizė, anketinė apklausa, grupavimas, atlikta duomenų analizė. Svarbiausios tyrimo išvados: nepakankamas dėmesys darbuotojų kvalifikacijos kėlimui, trūkumas reikiamos remontui įrangos ir įrankių. / The paper examines the construction equipment repair work organization problems. Theoretical work in management theories highlight the development aspects of the new management theory. Overview of construction equipment repairs Lithuania assessment. Practical work in the company looked “ CRAM” contruction equipment repair work organization analysis. Draws conclusions and recommendations. The aim – to analyze the building repair work organization. Survey raised the following tasks: to carry out a study of company employees, to analyze the building repair work organization, summarize the results of the investigation and submit proposals. The paper used survey methods: scientific literature analysis, questionnaire survey, group, conducted the data analysis. Key survey findings include: insufficient attention to staff training, lack of adequate maintenance equipment and tools.

Thesis (Ph. D.)--University of Oxford, 1989. / Includes bibliographical references (leaves 199-217).

M.Ing. (Electrical & Electronic Engineering) / Please refer to full text to view abstract

Submitted in partial fulfilment of the academic requirements for the Degree of Master's Degree in Technology: Chemical Engineering, ML Sultan Technikon, 2001. / There are two process operations in the sugar factory that directly affect the recovery of sugar from evaporated syrup, namely crystallisation (boiling) and centrifugal operation. Successful automation of the vacuum pans (boiling) has been implemented using brix (total dissolved solids) control, but to date on-line measurement of continuous centrifugal performance has not been successfully accomplished in South Africa. The purpose of this investigation was to continue the preliminary work performed by Tongaat Hulett Sugar in developing a purity meter for the measurement of sugar purity (sucrose content) in a continuous centrifugal. This instrument would provide the centrifugal operator with a reliable tool to perform on-line measurement of sugar purity and would also facilitate the automation of the centrifugal / M

This is a study to design and construct a suitable and effective mechanical device for storing, dispensing, and accounting for small tools and equipment used in industrial arts laboratories.