• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 176
  • 107
  • 20
  • 8
  • 6
  • 5
  • 4
  • 4
  • 4
  • 2
  • 2
  • 2
  • 2
  • 2
  • 2
  • Tagged with
  • 410
  • 98
  • 96
  • 72
  • 67
  • 58
  • 48
  • 48
  • 45
  • 39
  • 38
  • 37
  • 35
  • 35
  • 32
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Classification of transient events in time series /

Owsley, Lane M. D. January 1998 (has links)
Thesis (Ph. D.)--University of Washington, 1998. / Vita. Includes bibliographical references (leaves [127]-134).
52

Problems in sanitation of migrant workers' camps in Van Buren County, Michigan [submitted] in partial fulfillment ... Master of Public Health ... /

Koch, Reinhart W. January 1947 (has links)
Thesis (M.P.H.)--University of Michigan, 1947.
53

A critical study of methods of solving power system transient stability problems

Das Gupta, Sushil. January 1957 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1957. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 154-156).
54

Development of a deep level transient spectrometer and some deep level studies of Gallium Arsenide /

Chavva, Venkataramana Reddy. January 1993 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1994. / Includes bibliographical references (leaf 83).
55

Effects of hydraulic loading and laundry detergent on the operation of aerobic package treatment systems /

Hanna, K. Michael, January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 91-95). Also available via the Internet.
56

All-optical gain switching of erbium-doped fibre amplifiers.

Cheney, Glenn P. (Glenn Peter), Carleton University. Dissertation. Engineering, Electrical. January 1992 (has links)
Thesis (M. Eng.)--Carleton University, 1993. / Also available in electronic format on the Internet.
57

Unsteady friction under the influence of external flows, and the implications to transient-based leak detection methods /

Nixon, William. January 2005 (has links)
Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2005. / Includes bibliographical references (leaves 138-143). Also available in electronic version.
58

Investigation of modern diagnostic techniques for the assessment of degradation of metal oxide surge arresters /

Mardira, Karl Primardi. January 1900 (has links) (PDF)
Thesis (Ph.D.) - University of Queensland, 2003. / Includes bibliography.
59

Theoretical and computational aspects of optimal control of power system transients A.A new method of improving transient stability. B. Hybrid computer solution of the resulting two-point boundary value problem.

Ramarao, Nagavarapu, January 1970 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
60

AvaliaÃÃo de calibraÃÃo de redes hidrÃulicas usando o mÃtodo iterativo do gradiente hidrÃulico alternativo (MIGHA) aplicado a escoamento transiente / ASSESSMENT OF HYDRAULIC CALIBRATION NETWORKS USING ITERATIVE METHOD OF HYDRAULIC GRADIENT ALTERNATIVE (MIGHA) APPLIED TO TRANSIENT FLOW

Valder Adriano Gomes de Matos Rocha 20 December 2013 (has links)
nÃo hà / Quando se pretende simular o comportamento de uma rede hidrÃulica, à necessÃrio conhecer todos os parÃmetros fÃsicos desta rede. Com o tempo, alguns desses parÃmetros vÃo se alterando naturalmente devido ao desgaste e ao prÃprio uso, isso ocorre, por exemplo, com as rugosidades das tubulaÃÃes. A estimativa desses parÃmetros nÃo se dà por mÃtodos diretos, necessita-se conhecer algumas respostas hidrÃulicas, como vazÃo e pressÃo, para que se possa estimar esses parÃmetros atravÃs de mÃtodos inversos. O processo de busca ocorre atravÃs da comparaÃÃo entre medidas de pressÃo observadas em campo e medidas de pressÃo obtidas por esses mÃtodos. A busca pelo melhor conjunto resposta que represente esses parÃmetros desconhecidos recebe o nome de calibraÃÃo. Desenvolve-se um mÃtodo para estimar a rugosidade das tubulaÃÃes de uma rede hidrÃulica a partir de dados observados de cargas hidrÃulicas transientes durante um evento transitÃrio. O MÃtodo Iterativo do Gradiente HidrÃulico Alternativo (MIGHA) à utilizado como mÃtodo inverso neste trabalho. O transiente à provocado por manobras em uma vÃlvula de controle. Ensaios sÃo realizados em diferentes cenÃrios e sob diferentes condiÃÃes e os resultados mostram um mÃtodo simples, com resultados satisfatÃrios. / The real behavior of a Water distribution System depends on precise knowledge of physical parameters such as diameter, roughness, flow consumption (demands), etc. These parameters commonly change with time. For instance, one of the main parameters, the real roughness, tend to increase with time due to degradation of the specific pipe material. One can not precisely determine the real roughness of a pipe by using direct measurement methods. In order to achieve the objective of estimating roughness with some precision, two parameters of the water distribution network should be measured in the field, these parameters are pipe flow and pressure. Once known these parameters for a reasonable amount of points, equally distributed along the network of pipes, the real roughness may be determined by inverse methods. This process is called calibration. This study proposes a methodology to determine pipe roughness using transient pressure data which occurs during the Water Hammer Analysis phenomena. The Iterative Hydraulic Gradient Method is used as the inverse method in this study. The transient pressure data is produced by changes in the flow caused by opening and closing of Control Valves. According to results presented in this study the new methodology proposed appears to be simple and which produces reliable results.

Page generated in 0.0488 seconds