Decentralized control of inland navigation networks with distributaries: Application to navigation canals in the north of France

AbstractIn a context of global change, inland navigation transport has gained interest with economic and environmental benefits. The development of this means of conveyance requires the improvement of its management rules to deal with the increase of navigation (schedules and frequency) and the potential impact of global change. To achieve this aim, it is first necessary to have a better knowledge about the dynamics of inland navigation networks and their interaction with the environment. Second, the potential effects of global change have to be anticipated. This article focuses on the modeling of inland navigation reaches. An inland navigation network is a large-scale distributed system composed of several interconnected reaches. These reaches are characterized by non-linearities, time delays, and generally no significant slope. To deal with these particularities, a gray-box model is proposed. It consists in determining the delays according to the physical characteristics of the system. The parameters of the model are identified with measured data. The gray-box model is used to reproduce the dynamics of the Cuinchy–Fontinettes reach located in the north of France.

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Modeling and fault diagnosis of flat inland navigation canals

Proceedings of the Institution of Mechanical Engineers Part I Journal of Systems and Control Engineering ◽

10.1177/0959651818773187 ◽

2018 ◽

Vol 232 (6) ◽

pp. 761-771 ◽

Cited By ~ 2

Author(s):

Pau Segovia ◽

Joaquim Blesa ◽

Klaudia Horváth ◽

Lala Rajaoarisoa ◽

Fatiha Nejjari ◽

...

Keyword(s):

Fault Diagnosis ◽

Measured Data ◽

Actuator Faults ◽

Inland Navigation ◽

The North ◽

Resonance Phenomena ◽

Analytical Redundancy ◽

Navigation Condition ◽

Natural Rivers ◽

Level Sensors

This article regards the development of an analytical redundancy-based approach for detecting and isolating both sensor and actuator faults in flat inland navigation canals. Inland navigation networks are principally used for transport and are composed of many canalized natural rivers and artificial canals characterized by no slope. These canals are strongly affected by resonance phenomena, which can create waves such that the navigation condition might not be guaranteed. It is, therefore, required to ensure dealing with fault-free measured data and actuators. The proposed approach is based on the integrator delay zero model of the flat inland navigation canal. The proposed method is tested by considering the Cuinchy–Fontinettes navigation reach (in the north of France) to detect and isolate the occurrence of faults in the Cuinchy and Fontinettes level sensors and in the Cuinchy gate.

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Modeling of interconnected flat open-channel flow: application to inland navigation canals

La Houille Blanche ◽

10.1051/lhb/2018055 ◽

2018 ◽

pp. 87-95

Author(s):

P. Segovia ◽

L. Rajaoarisoa ◽

F. Nejjari ◽

V. Puig ◽

E. Duviella

Keyword(s):

General Model ◽

Large Scale ◽

Open Channel ◽

Water Stream ◽

Large Scale Systems ◽

Inland Navigation ◽

The North ◽

Calibration Step ◽

Water Depths

Inland navigation networks are composed of several artificial canals, usually characterized by no slope. These canals are large-scale systems that can be accurately described by means of the nonlinear Saint-Venant partial differential equations. However, the lack of an analytical solution for these equations is one of the reasons why simplified models have been developed. In this work, the Integrator-Delay-Zero model is used as the input-output model to link the water depths to the discharges. A modeling extension for a canal with inflows and outflows along the water stream is proposed: an overlapping problem is discussed and a criterion choice is defined in order to obtain the general model. With regard to this criterion, a calibration step is needed, both to overcome the natural limitations of the simplified model and to ensure the correct computation of the general model. The application of this modeling approach to a part of the inland navigation network in the north of France serves as the case study for this work.

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Investor-State Dispute Settlement under NAFTA Chapter 11: The Shape of Things to Come?

Canadian Yearbook of international Law/Annuaire canadien de droit international ◽

10.1017/s0069005800006652 ◽

1998 ◽

Vol 35 ◽

pp. 263-290

Author(s):

J. Anthony VanDuzer

Keyword(s):

Free Trade Agreement ◽

Dispute Settlement ◽

Trade Agreement ◽

Minimum Standards ◽

The North ◽

State Behaviour ◽

Nafta Chapter 11 ◽

To Come ◽

The Right

SummaryRecently, there has been a proliferation of international agreements imposing minimum standards on states in respect of their treatment of foreign investors and allowing investors to initiate dispute settlement proceedings where a state violates these standards. Of greatest significance to Canada is Chapter 11 of the North American Free Trade Agreement, which provides both standards for state behaviour and the right to initiate binding arbitration. Since 1996, four cases have been brought under Chapter 11. This note describes the Chapter 11 process and suggests some of the issues that may arise as it is increasingly resorted to by investors.

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Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

International Astronomical Union Colloquium ◽

10.1017/s0252921100064496 ◽

2000 ◽

Vol 179 ◽

pp. 201-204

Author(s):

Vojtech Rušin ◽

Milan Minarovjech ◽

Milan Rybanský

Keyword(s):

Emission Lines ◽

High Latitudes ◽

Green Line ◽

Solar Cycles ◽

The South ◽

Coronal Emission ◽

Local Maxima ◽

The North ◽

Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

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Bembicosoma re-examined: a xiphosuran from the Silurian of the North Esk Inlier, Pentland Hills, Scotland

Transactions of the Royal Society of Edinburgh Earth Sciences ◽

10.1017/s0263593303000129 ◽

2003 ◽

Vol 94 (03) ◽

pp. 199

Keyword(s):

The North

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An ultrastructural study of sertoli cells in two geographically isolated populations of Aphanius dispar

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100123143 ◽

1992 ◽

Vol 50 (1) ◽

pp. 548-549

Author(s):

Taber A. Ba-Omar ◽

Philip F. Prentis

Keyword(s):

Ultrastructural Level ◽

Uranyl Acetate ◽

Freshwater Teleost ◽

Isolated Populations ◽

En Bloc ◽

The North ◽

Group A ◽

Ultrathin Sections ◽

Group B ◽

Geographically Isolated

We have recently carried out a study of spermiogenic differentiation in two geographically isolated populations of Aphanius dispar (freshwater teleost), with a view to ascertaining variation at the ultrastructural level. The sampling areas were the Jebel Al Akhdar in the north (Group A) and the Dhofar region (Group B) in the south. Specimens from each group were collected, the testes removed, fixed in Karnovsky solution, post fixed in OsO, en bloc stained with uranyl acetate and then routinely processed to Agar 100 resin, semi and ultrathin sections were prepared for study.

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SEM and TEM observations of sperm development in the testis of the freshwater fish Oreochromis mossambicus

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100157838 ◽

1990 ◽

Vol 48 (3) ◽

pp. 58-59

Author(s):

Daryl A. Cornish ◽

George L. Smit

Keyword(s):

Morphological Characteristics ◽

Oreochromis Mossambicus ◽

Breeding Cycle ◽

Limited Information ◽

North West ◽

The North ◽

Sem And Tem ◽

Sperm Development ◽

Ultrastructural Characteristics ◽

The University

Oreochromis mossambicus is currently receiving much attention as a candidater species for aquaculture programs within Southern Africa. This has stimulated interest in its breeding cycle as well as the morphological characteristics of the gonads. Limited information is available on SEM and TEM observations of the male gonads. It is known that the testis of O. mossambicus is a paired, intra-abdominal structure of the lobular type, although further details of its characteristics are not known. Current investigations have shown that spermatids reach full maturity some two months after the female becomes gravid. Throughout the year, the testes contain spermatids at various stages of development although spermiogenesis appears to be maximal during November when spawning occurs. This paper describes the morphological and ultrastructural characteristics of the testes and spermatids.Specimens of this fish were collected at Syferkuil Dam, 8 km north- west of the University of the North over a twelve month period, sacrificed and the testes excised.

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