How does the body-scale model affect back-calculated growth: The example of arctic charr,Salvelinus alpinus (L.), of Lake Geneva (Switzerland)     

J. -F. Rubin  N. Perrin 《Aquatic Sciences - Research Across Boundaries》1990,52(3):287-295

When back-calculating fish length from scale measurements, the choice of the body-scale relationship is a fundamental step. Using data from the arctic charrSalvelinus alpinus (L.) of Lake Geneva (Switzerland) we show the need for a curvilinear model, on both statistical and biological grounds. From several 2-parameters models, the log-linear relationship appears to provide the best fit. A 3-parameters, Bertalanffy model did not improve the fit. We show moreover that using the proportional model would lead to important misinterpretations of the data.  相似文献   

Short field meeting in north Norfolk: 19-21 October 1973     

P.H. Banham  H. Davies  R.M.S. Perrin 《Proceedings of the Geologists' Association. Geologists' Association》1975,86(2):251-257

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Hydrology under change: an evaluation protocol to investigate how hydrological models deal with changing catchments   总被引：1，自引：0，他引：1  

G. Thirel  V. Andréassian  C. Perrin  J.-N. Audouy  L. Berthet  P. Edwards 《水文科学杂志》2015,60(7-8):1184-1199

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Rotation of the Semail ophiolite (Oman): Additional Paleomagnetic data from the volcanic sequence     

Perrin  Mireille  Plenier  Guillaume  Dautria  Jean-Marie  Cocuaud  Emmanuel  Prévot  Michel 《Marine Geophysical Researches》2000,21(3-4):181-194

Thirty-two flows (247 cores) were sampled in the V1 (Geotimes) and V2 (Lasail) volcanic units of the Semail ophiolite, Oman (Aswad, Fizh, Hilti, Sarami, Wuqbah, and Tayin massifs). Paleomagnetic analysis of the samples was complicated by a large overlap of the two components of magnetization carried by the rocks: a crystalline remanent magnetization (CRM) acquired in the present day field, probably during weathering, and an older CRM probably produced by oxidation of the original titanomagnetites during hydrothermal event(s). If the magnetization carried by the V1 samples was acquired during the hydrothermal event related to the emplacement of these lava, e.g., during and/or shortly after cooling, the tectonic unity of the northern domain has to be questioned and a differential rotation considered between the Aswad and Hilti-Sarami massifs but, by the time of emplacement of the V2 series, this northern area seems to behave as one large unit. As only one set of data is available for the southern Tayin-Sumail massif, it is premature but a possible relative rotation on the order of 90° can be suspected between the Hilti-Sarami and Tayin-Sumail massifs, rotation which would have occurred after emplacement of the V2 series.  相似文献   

Slopes of an airborne electromagnetic resistivity model interpolated jointly with borehole data for 3D geological modelling          下载免费PDF全文

P.‐A. Reninger  G. Martelet  J. Perrin  J. Deparis  Y. Chen 《Geophysical Prospecting》2017,65(4):1085-1096

We investigate a novel way to introduce resistivity models deriving from airborne electromagnetic surveys into regional geological modelling. Standard geometrical geological modelling can be strengthened using geophysical data. Here, we propose to extract information contained in a resistivity model in the form of local slopes that constrain the modelling of geological interfaces. The proposed method is illustrated on an airborne electromagnetic survey conducted in the region of Courtenay in France. First, a resistivity contrast corresponding to the clay/chalk interface was interpreted confronting the electromagnetic soundings to boreholes. Slopes were then sampled on this geophysical model and jointly interpolated with the clay/chalk interface documented in boreholes using an implicit 3D potential‐field method. In order to evaluate this new joint geophysical–geological model, its accuracy was compared with that of both pure geological and pure geophysical models for various borehole configurations. The proposed joint modelling yields the most accurate clay/chalk interface whatever the number and location of boreholes taken into account for modelling and validation. Compared with standard geological modelling, the approach introduces in between boreholes geometrical information derived from geophysical results. Compared with conventional resistivity interpretation of the geophysical model, it reduces drift effects and honours the boreholes. The method therefore improves what is commonly obtained with geological or geophysical data separately, making it very attractive for robust 3D geological modelling of the subsurface.  相似文献   

In Situ Study of the Thick Disk. Preliminary Results     

D. Katz  R. Cayrel  M.-F. Coupry  M.-N. Perrin  C. Van 't Veer  C. Soubiran  B. Barbuy  O. Bienaymé  E. Friel 《Astrophysics and Space Science》1999,265(1-4):221-224

We report the advancement of our chemical and kinematical study of thethick disk. The methods used to derive the stellar parameters arediscussed and the preliminary results presented. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Erratum to: The Infrared Solar Spectrum Measured by the SOLSPEC Spectrometer Onboard the International Space Station     

G. Thuillier  J. W. Harder  A. Shapiro  T. N. Woods  J.-M. Perrin  M. Snow  T. Sukhodolov  W. Schmutz 《Solar physics》2015,290(10):3089-3089

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Imaging the heart of astrophysical objects with optical long-baseline interferometry     

J.-P. Berger  F. Malbet  F. Baron  A. Chiavassa  G. Duvert  M. Elitzur  B. Freytag  F. Gueth  S. H?nig  J. Hron  H. Jang-Condell  J.-B. Le Bouquin  J.-L. Monin  J. D. Monnier  G. Perrin  B. Plez  T. Ratzka  S. Renard  S. Stefl  E. Thiébaut  K. R. W. Tristram  T. Verhoelst  S. Wolf  J. Young 《Astronomy and Astrophysics Review》2012,20(1):1-55

The number of publications of aperture-synthesis images based on optical long-baseline interferometry measurements has recently increased due to easier access to visible and infrared interferometers. The interferometry technique has now reached a technical maturity level that opens new avenues for numerous astrophysical topics requiring milli-arcsecond model-independent imaging. In writing this paper our motivation was twofold: (1) review and publicize emblematic excerpts of the impressive corpus accumulated in the field of optical interferometry image reconstruction; (2) discuss future prospects for this technique by selecting four representative astrophysical science cases in order to review the potential benefits of using optical long-baseline interferometers. For this second goal we have simulated interferometric data from those selected astrophysical environments and used state-of-the-art codes to provide the reconstructed images that are reachable with current or soon-to-be facilities. The image-reconstruction process was ??blind?? in the sense that reconstructors had no knowledge of the input brightness distributions. We discuss the impact of optical interferometry in those four astrophysical fields. We show that image-reconstruction software successfully provides accurate morphological information on a variety of astrophysical topics and review the current strengths and weaknesses of such reconstructions. We investigate how to improve image reconstruction and the quality of the image possibly by upgrading the current facilities. We finally argue that optical interferometers and their corresponding instrumentation, existing or to come, with six to ten telescopes, should be well suited to provide images of complex sceneries.  相似文献   

High dynamic range imaging by pupil single-mode filtering and remapping     

G. Perrin  S. Lacour  J. Woillez  É. Thiébaut 《Monthly notices of the Royal Astronomical Society》2006,373(2):747-751

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Investigation of recharge dynamics and flow paths in a fractured crystalline aquifer in semi-arid India using borehole logs: implications for managed aquifer recharge     

M. Alazard  A. Boisson  J-C. Maréchal  J. Perrin  B. Dewandel  T. Schwarz  M. Pettenati  G. Picot-Colbeaux  W. Kloppman  S. Ahmed 《Hydrogeology Journal》2016,24(1):35-57

The recharge flow paths in a typical weathered hard-rock aquifer in a semi-arid area of southern India were investigated in relation to structures associated with a managed aquifer recharge (MAR) scheme. Despite the large number of MAR structures, the mechanisms of recharge in their vicinity are still unclear. The study uses a percolation tank as a tool to identify the input signal of the recharge and uses multiple measurements (piezometric time series, electrical conductivity profiles in boreholes) compared against heat-pulse flowmeter measurements and geochemical data (major ions and stable isotopes) to examine recharge flow paths. The recharge process is a combination of diffuse piston flow and preferential flow paths. Direct vertical percolation appears to be very limited, in contradiction to the conceptual model generally admitted where vertical flow through saprolite is considered as the main recharge process. The horizontal component of the flow leads to a strong geochemical stratification of the water column. The complex recharge pattern, presented in a conceptual model, leads to varied impacts on groundwater quality and availability in both time and space, inducing strong implications for water management, water quality evolution, MAR monitoring and longer-term socio-economic costs.  相似文献