58 research outputs found
A high-frequency, long-term data set of hydrology and sediment yield: the alpine badland catchments of Draix-Bléone Observatory
Draix-Bléone critical zone observatory was created in
1983 to study erosion processes in a mountainous badland region of the
French Southern Alps. Six catchments of varying size (0.001 to 22 km2)
and vegetation cover are equipped to measure water and sediment fluxes, both
as bedload and suspended load. This paper presents the core dataset of the
observatory, including rainfall and meteorology, high-frequency discharge
and suspended-sediment concentration, and event-scale bedload volumes. The
longest records span almost 40Â years. Measurement and data-processing
methods are presented, as well as data quality assessment procedures and
examples of results. All the data presented in this paper are available on
the open repository https://doi.org/10.17180/obs.draix (Draix-Bleone
Observatory, 2015), and a 5-year snapshot is available for review at
https://doi.org/10.57745/BEYQFQ (Klotz et al., 2023).</p
Bedload transport monitoring at Draix
International audienceConférence invitée lors du International Workshop on Monitoring Bedload and Debris-Flows in Mountain Basins, Free University of Bolzano, Italy, 10-12 October 2012
Bedload transport monitoring in a small upland catchment
International audienceCommunication orale faite lors du 8th IAG International Conference on Geomorphology, Paris, 27-31 August 2013
Nonlinear programming approach for design of high performance sigma-delta modulators
\u3cp\u3eIn this chapter we present a nonlinear programming approach to the design of third-order sigma–delta modulators with respect to maximization of the signal-to-noise ratio, taking into account the modulator’s stability. The proposed approach uses an analytic formula for calculation of the signal-to-noise ratio and an analytic formula for stability of the modulator. Thus the goal function becomes maximization of the signal-to-noise ratio and constraints come from stability issues and bounds of the modulator noise transfer function coefficients. The results are compared with the optimal third-order modulator design provided by DStoolbox. The proposed procedure has low computation requirements. It is described for third-order modulators with one real pole of the loop filter transfer function and can be extended easily and generalized to higher-order modulators.\u3c/p\u3
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