The earth's dynamic systems: W.K. Hamblin, 1974. Burgess,Minneapolis, Minn., 578 pp., U.S. $14.95     

Theo Gibb 《Earth》1975,11(4):372-373

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Large sea-ice volume anomalies simulated in a coupled climate model     

Goosse  H.  Selten  F.  Haarsma  R.  Opsteegh  J. 《Climate Dynamics》2003,20(5):523-536

Climate Dynamics - The processes leading to the formation of a large anomaly of sea-ice volume integrated over the Northern Hemisphere have been investigated in a coarse-resolution...  相似文献   

Towards a new concept of the tectogenesis of the Pyrenees     

Theo Engeser  Wolfgang Schwentke 《Tectonophysics》1986,129(1-4)

Crustal structures of the Central and Eastern Pyrenees are compared with those of the Alps and Carpathians. By analogy, northward subduction/underthrusting in the Central and Eastern Pyrenees is proposed. Southward subduction/underthrusting is found along the North Iberian margin and Western Pyrenees. Hence, a flip—a change in the direction of subduction/underthrusting—is postulated between the Central and Western Pyrenees.  相似文献   

Bayesian Deep Learning for Spatial Interpolation in the Presence of Auxiliary Information     

Kirkwood  Charlie  Economou  Theo  Pugeault  Nicolas  Odbert  Henry 《Mathematical Geosciences》2022,54(3):507-531

Mathematical Geosciences - Earth scientists increasingly deal with ‘big data’. For spatial interpolation tasks, variants of kriging have long been regarded as the established...  相似文献   

The effect of gauge length on axially incident P‐waves measured using fibre optic distributed vibration sensing          下载免费PDF全文

Timothy Dean  Theo Cuny  Arthur H. Hartog 《Geophysical Prospecting》2017,65(1):184-193

Distributed vibration sensing, also known as distributed acoustic sensing, is a relatively new method for recording vertical seismic profile data using a fibre optic cable as the sensor. The signal obtained from such systems is a distributed measurement over a length of fibre referred to as the gauge length. In this paper, we show that gauge length selection is one of the most important acquisition parameters for a distributed vibration sensing survey. If the gauge length is too small, then the signal‐to‐noise ratio will be poor. If the gauge length is too large, resolution will be reduced and the shape of the wavelet will be distorted. The optimum gauge length, as derived here, is a function of the velocity and frequencies of the seismic waves being measured. If these attributes vary considerably over the depth of a survey, then the use of different gauge lengths is recommended. The significant increases in data quality resulting from the use of multiple gauge length values are demonstrated using field data.  相似文献   

Challenges to calibration: Facing an increasingly critical environment     

Olsthoorn TN  Kamps PT 《Ground water》2006,44(6):876-879

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Dark clasts in the Khor Temiki aubrite: Not basalts     

Horton E. Newsom  Theo Ntaflos  Klaus Keil 《Meteoritics & planetary science》1996,31(1):146-151

Abstract— The enstatite achondrite meteorites (aubrites) are ultramafic assemblages with highly variable bulk rare earth element (REE) compositions. An enrichment of REE in a dark clast from the Khor Temiki aubrite led Wolf et al. (1983) to suggest that such dark clasts could be the basaltic (i.e., enstatite-plagioclase) complements to the ultramafic aubrites, with the relatively high REE contents resulting from the presence of plagioclase, which is a common carrier of the REEs. We have studied several dark clasts from the Khor Temiki aubrite and find no evidence for a basaltic character for such material. The microscopic character of the dark clasts is not significantly different from the main portions of Khor Temiki and consists either of highly brecciated material, containing a fine-grained matrix, or of enstatite grains with abundant inclusions. We suggest that the dark clasts are shock-darkened, heterogeneous Khor Temiki material that, by chance, contained variable trace contents of oldhamite (CaS), which has been shown to be a major carrier of REE in aubrites. We find that the REE contents of the clasts range from 0.1 to ～20× CI. Most have negative Eu anomalies, but one has a small positive anomaly. Extensive searches have failed to identify basaltic material in Khor Temiki and other aubrites. The absence of basaltic material is consistent with, but does not prove, the model of Wilson and Keil (1991). They calculate that, on an asteroidal parent body < ～100 km in radius, a volatile-rich basaltic partial melt erupted with a velocity greater than the escape velocity of the asteroid and, thus, was lost into space ～ 4.55 Ga ago.  相似文献   

Understanding activity scheduling and rescheduling behaviour: Theory and numerical illustration     

Chang-Hyeon Joh  Theo A. Arentze  Harry J.P. Timmermans 《GeoJournal》2001,53(4):359-371

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An intelligent spatial land use planning support system using socially rational agents     

Seyed Morsal Ghavami  Mohammad Taleai  Theo Arentze 《International journal of geographical information science》2017,31(5):1022-1041

This research presents an intelligent planning support system based on multi-agent systems for spatial urban land use planning. The proposed system consists of two main phases: a pre-negotiation phase and an automated negotiation phase. The pre-negotiation phase involves interaction between human actors and intelligent software agents in order to elicit the actors’ social preferences. The agents employ social value orientation theory, which is rooted in social psychology, in order to model actors’ social preferences. The automated negotiation phase involves negotiation among autonomous software agents, the aim being to achieve consensus about the spatial problem on behalf of the relevant actors and using the information obtained.

This study employs a computationally effective Bayesian learning technique, along with social value orientation theory, to design socially rational intelligent agents who work on behalf of real actors. The proposed system is applied to a real world urban land use planning case study. Human actors participate in a pre-negotiation phase, and their social preferences are elicited by intelligent software agents through a number of interactions. Then, software agents come together to engage in an automated negotiation phase and eventually reach an agreement on the spatial configuration of urban land uses on behalf of the actors. The results of the study show that the proposed system is effective at performing an automated negotiation, plus that the final plan – which is the output of the automated negotiation – produces higher social utility and better spatial land use configurations for the agents.  相似文献   

Peripherality in the global container shipping network: the case of the Southern African container port system   总被引：1，自引：0，他引：1  

Darren Ronald Fraser  Theo Notteboom  César Ducruet 《GeoJournal》2016,81(1):139-151

Regional trade co-operation, economic growth and greater political stability have enabled increased container throughput and container port capacity development. Earlier academic work has indicated that the functional position of this port region in the global maritime network might be shifting from a remote region in the periphery of the network to a more intermediate position. This paper aims to analyze the changing level of peripherality and remoteness of the Southern African container port system as part of the global container shipping network. The central hypothesis is that Southern Africa has moved from a remote shipping region to a more central shipping region in the global network. The methodology consists of the calculation of network measures for Southern African ports. The changing geographical distribution of flows among the main container ports in South Africa, Namibia, Mozambique, Mauritius and Madagascar will also be explored in terms of their respective shipping services, port calling patterns, market structure (in terms of the number of active carriers) and the up-scaling of vessel and port capacity. The overall result is a mapped port hierarchical structure with a clear indication of the shifted maritime centrality of Southern African ports from 1996 to the present decade.  相似文献