| |
|
|
|
|
|
|
|
|
1. |
Record Nr. |
UNINA9910256558803321 |
|
|
Titolo |
Boschi vetusti del Parco Nazionale del Gran Sasso e Monti della Laga / Piermaria Corona ... [et al.] |
|
|
|
|
|
|
|
Pubbl/distr/stampa |
|
|
Arezzo : Compagnia delle foreste, 2016 |
|
|
|
|
|
|
|
ISBN |
|
|
|
|
|
|
Descrizione fisica |
|
|
|
|
|
|
Collana |
|
|
|
|
|
|
Disciplina |
|
|
|
|
|
|
Locazione |
|
|
|
|
|
|
Collocazione |
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
2. |
Record Nr. |
UNINA9910147249803321 |
|
|
Titolo |
IEEE Std 383-2003 (Revision of IEEE Std 383-1974): : IEEE Standard for Qualifying Class 1E Electric Cables and Field Splices for Nuclear Power Generating Stations / / Institute of Electrical and Electronics Engineers |
|
|
|
|
|
|
|
Pubbl/distr/stampa |
|
|
New York, N.Y. : , : IEEE, , 2004 |
|
|
|
|
|
|
|
Descrizione fisica |
|
1 online resource (vi, 15 pages) |
|
|
|
|
|
|
Disciplina |
|
|
|
|
|
|
Soggetti |
|
Electric cables - Standards |
Electric wire |
|
|
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
|
|
|
|
|
Sommario/riassunto |
|
This standard provides general requirements, direction, and methods for qualifying Class1E electric cables, field splices, factory splices, and factory rework for service in nuclear power generating stations. Categories of cables covered are those used for power, control, and instrumentation services, including signal and communication cables. Field cables, wires, and splices are within the scope of this standard. Cables, wires, and splices within or integral to other devices(e.g., instruments, panels, motors, etc.) should be qualified using the requirements in the applicable device standard or IEEE Std 323TM-1983, as appropriate. However, this standard's requirements may be applied to the wire and cable within these devices. Scope: This standard provides general requirements, direction, and methods for qualifying Class 1E electric cables,field splices, factory splices, and factory rework for service in nuclear power generating stations. Categories of cables covered are those used for power, control, and instrumentation services, including signal and communication cables. Field cables, wires, and splices are within the scope of this standard. Cables, wires, and splices within or integral to other devices (e.g., instruments, panels, motors, etc.) should be qualified using the requirements in the applicable device standard or IEEE Std 323TM-1983, as appropriate. However, this standard's requirements may be applied to the wire and cable within these devices. Purpose: The purpose of this standard is to provide specific direction for the implementation of IEEE Std 323-1983 as it pertains to the qualification of electrical cables and field splices. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3. |
Record Nr. |
UNINA9910299608903321 |
|
|
Autore |
Saldivar Márquez Martha Belem |
|
|
Titolo |
Analysis and Control of Oilwell Drilling Vibrations : A Time-Delay Systems Approach / / by Martha Belem Saldivar Márquez, Islam Boussaada, Hugues Mounier, Silviu-Iulian Niculescu |
|
|
|
|
|
|
|
Pubbl/distr/stampa |
|
|
Cham : , : Springer International Publishing : , : Imprint : Springer, , 2015 |
|
|
|
|
|
|
|
|
|
ISBN |
|
|
|
|
|
|
Edizione |
[1st ed. 2015.] |
|
|
|
|
|
Descrizione fisica |
|
1 online resource (294 p.) |
|
|
|
|
|
|
Collana |
|
Advances in Industrial Control, , 1430-9491 |
|
|
|
|
|
|
Disciplina |
|
|
|
|
|
|
Soggetti |
|
Fossil fuels |
Automatic control |
Vibration |
Dynamics |
Fossil Fuels (incl. Carbon Capture) |
Control and Systems Theory |
Vibration, Dynamical Systems, Control |
|
|
|
|
|
|
|
|
Lingua di pubblicazione |
|
|
|
|
|
|
Formato |
Materiale a stampa |
|
|
|
|
|
Livello bibliografico |
Monografia |
|
|
|
|
|
Note generali |
|
Description based upon print version of record. |
|
|
|
|
|
|
Nota di bibliografia |
|
Includes bibliographical references and index. |
|
|
|
|
|
|
Nota di contenuto |
|
From the Contents: Introduction -- Part I Modelling -- An Overview of Drillstring Models -- Bit–Rock Frictional Interface -- Comprehensive Modelling of a Vertical Oilwell Drilling System -- Part II Analysis -- Neural-Type Time-Delay Systems: Theoretical Background -- Part III Control -- Field Observations and Empirical Drilling Control -- Low-Order Controllers -- Flatness-Based Control of Drilling Vibrations. |
|
|
|
|
|
|
|
|
Sommario/riassunto |
|
This book reports the results of exhaustive research work on modeling and control of vertical oilwell drilling systems. It is focused on the analysis of the system-dynamic response and the elimination of the most damaging drillstring vibration modes affecting overall perforation performance: stick-slip (torsional vibration) and bit-bounce (axial vibration). The text is organized in three parts. The first part, Modeling, presents lumped- and distributed-parameter models that allow the dynamic behavior of the drillstring to be characterized; a comprehensive mathematical model taking into account mechanical |
|
|
|
|
|
|
|
|
|
|
and electric components of the overall drilling system is also provided. The distributed nature of the system is accommodated by considering a system of wave equations subject to nonlinear boundary conditions; this model is transformed into a pair of neutral-type time-delay equations which can overcome the complexity involved in the analysis and simulation of the partial differential equation model. The second part, Analysis, is devoted to the study of the response of the system described by the time-delay model; important properties useful for analyzing system stability are investigated and frequency- and time-domain techniques are reviewed. Part III, Control, concerns the design of stabilizing control laws aimed at eliminating undesirable drilling vibrations; diverse control techniques based on infinite--dimensional system representations are designed and evaluated. The control proposals are shown to be effective in suppressing stick-slip and bit-bounce so that a considerable improvement of the overall drilling performance can be achieved. This self-contained book provides operational guidelines to avoid drilling vibrations. Furthermore, since the modeling and control techniques presented here can be generalized to treat diverse engineering problems, it constitutes a useful resource to researchers working on control and its engineering application in oilwell drilling. |
|
|
|
|
|
| |