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The Generalised Settlement Area:mapping the Earth surface in the vicinity of built-up areas

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International Journal of Digital Earth 2020年第1期13卷 45-60页

作者： A.J.Florczyk m.melchiorri J.Zeidler C.Corbane m.Schiavina S.Freire F.Sabo P.Politis T.Esch m.Pesaresi European Commission Joint Research Centre(JRC)Directorate for SpaceSecurity&MigrationIspraItaly Piksel S.r.l MilanoItaly German Aerospace Center(DLR) German Remote Sensing Data Center(DFD)WeßlingGermany Arhs Developments Italia S.r.l.milano Italy Arhs Developments S.A. LuxembourgLuxembourg

Geo-information on settlements from Earth Observation offers a base for objective and scalable monitoring of the evolution of cities and settlements,including their location,extent and other *** this work,we deploy the best available global knowledge on the presence of human settlements and built-up structures derived from Earth Observation to advance the understanding of the human presence on *** start from a concept of Generalised Settlement Area to identify the Earth surface within which any built-up structure is *** further characterise the resulted map by using an agreement map among the state of the art of remote sensing products mapping built-up areas or other strictly related semantic abstractions as urban areas or artificial *** agreement map is formed by a grid of 1 km2,where each cell is classified according to the number of EO-derived products reporting any positive occurrence of the abstractions related to the presence of built-up *** paper describes the characteristics of the Generalised Settlement Area,the differences in the agreement map across geographic regions of the world,and outlines the implications for potential users of the EO-derived products used in this study.

关键词： Generalised settlement area built-up area human settlement map agreement map

Simulation of heat transfer in steel billets during continuous casting

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International Journal of minerals,metallurgy and materials 2010年第4期17卷 403-416页

作者： A.Ramirez-López R.Aguilar-López m.Palomar-Pardavé m.A.Romero-Romo D.muoz-Negrón Department of materials metropolitan Autonomous University Mexico City C.P.02200Mexico Institute Polytechnic National Mexico City C.P.07300Mexico Institute Technologic Autonomous of mexico Mexico City C.P.01080Mexico Institute Polytechnic National mexico City C.P.07300 Mexico

This work is focused on the development of computational algorithms to create a simulator for solving the heat transfer during the continuous casting process of steel. The temperatures and the solid shell thickness profiles were calculated and displayed on the screen for a billet through a defined continuous casting plant （CCP）. The algorithms developed to calculate billet temperatures, involve the solutions of the corresponding equations for the heat removal conditions such as radiation, forced convection, and conduction according to the billet posi- tion through the CCP. This is done by a simultaneous comparison with the kinematics model previously developed. A finite difference method known as Cmnk-Nicholson is applied to solve the two-dimensional computational array （2D model）. Enthalpy （HIJ） and temperature （TIL） in every node are updated at each step time. The routines to display the results have been developed using a graphical user interface （GUI） in the programming language C＋＋. Finally, the results obtained are compared with those of industrial trials for the surface temperature of three steel casters with different plant configurations in different casting conditions.

关键词： continuous casting heat transfer heat removal simulation numerical methods

Low loss optical waveguide crossing based on octagonal resonant cavity coupling

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Optoelectronics Letters 2009年第3期5卷 198-201页

作者： mohd.Zahed m.Khan Electronics and Electrical Engineering Department King Fahd University of Petroleum and Minerals

A waveguide crossing utilizing a high index contrast material system is *** structure is based on coupling with an octagonal resonant cavity inserted at the waveguide *** also employs four identical square metal strips placed at the four corners of the waveguide *** spectral response of the structure calculated using the method of line numerical technique,in general,shows a high power transmission in the forward arm with sufficiently low crosstalk and fraction of radiated power.

关键词：光波导谐振腔耦合八角低损耗材料系统计算方法光谱响应

Computational algorithms to simulate the steel continuous casting

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International Journal of minerals,metallurgy and materials 2010年第5期17卷 596-607页

作者： A. Ramírez-López G. Soto-Cortés m. Palomar-Pardavé m.A. Romero-Romo R. Aguilar-López Institute Polytechnic National(mexico) Department of materials Metropolitan Autonomous University

Computational simulation is a very powerful tool to analyze industrial processes to reduce operating risks and improve profits from equipment. The present work describes the development of some computational algorithms based on the numerical method to create a simulator for the continuous casting process, which is the most popular method to produce steel products for metallurgical industries. The kinematics of industrial processing was computationally reproduced using subroutines logically programmed. The cast steel by each strand was calculated using an iterative method nested in the main loop. The process was repeated at each time step （？t） to calculate the casting time, simultaneously, the steel billets produced were counted and stored. The subroutines were used for creating a computational representation of a continuous casting plant （CCP） and displaying the simulation of the steel displacement through the CCP. These algorithms have been developed to create a simulator using the programming language C＋＋. Algorithms for computer animation of the continuous casting process were created using a graphical user interface （GUI）. Finally, the simulator functionality was shown and validated by comparing with the industrial information of the steel production of three casters.

关键词： continuous casting simulation numerical method computational algorithm

Compliant lightweight non-invasive standalone“marine Skin”tagging system

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npj Flexible Electronics 2018年第1期2卷 97-105页

作者： Joanna m.Nassar Sherjeel m.Khan Seneca J.Velling Andrea Diaz-Gaxiola Sohail F.Shaikh Nathan R.Geraldi Galo A.Torres Sevilla Carlos m.Duarte muhammad m.Hussain mmh Labs Computer Electrical Mathematical Science and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia material&Nanoscience Program Faculty of ScienceUniversity of WaterlooWaterlooON N2L-3G1Canada Red Sea Research Center(RSRC) Biological and Environmental Sciences and Engineering(BESE)DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia

Current marine research primarily depends on weighty and invasive sensory equipment and telemetric network to understand the marine environment,including the diverse fauna it contains,as a function of animal behavior and size,as well as equipment *** match animal morphology and activity within the surrounding marine environment,here we show a physically flexible and stretchable skin-like and waterproof autonomous multifunctional system,integrating Bluetooth,memory chip,and high performance physical *** sensory tag is mounted on a swimming crab(Portunus pelagicus)and is capable of continuous logging of depth,temperature,and salinity within the harsh ocean *** fully packaged,ultra-lightweight(mpliant“marine Skin”system does not have any wired connection enabling safe and weightless cuttingedge approach to monitor and assess marine life and the ecosystem’s health to support conservation and management of marine ecosystems.

关键词： marine system Skin

Atrazine removal from water by activated charcoal cloths

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International Soil and Water Conservation Research 2020年第2期8卷 205-212页

作者： Javier m.Gonzalez Lynnette R.murphy Chad J.Penn Veera m.Boddu Laura L.Sanders National Soil Erosion Research Laboratory USDA-ARSWest LafayetteIN47907USA Earth Science Department Northeastern Illinois UniversityChicagoIL60625USA O’Neill School of Public and Environmental Affairs University of IndianaBloomingtonIN47405USA Plant Polymer Research Unit National Center for Agriculture Utilization ResearchUSDA-ARSPeoriaIL61604USA

Pollution control structures may be adapted to enhance the removal of nutrients and pesticides from water. Charcoal-like material is known to sorb organic compounds in solution, including atrazine, a herbicide used to control broadleaf weeds, which persists in soils and can migrate from soils to water bodies, ultimately affecting water quality. The primary goal of this study was to investigate if activated charcoal cloths (single-weave, SW;double-weave, DW;and knitted, KT) are more efficient to remove atrazine from aqueous solutions than a cloth without activated charcoal (control) currently used in pollution control structures. The approach consisted of sorption kinetics, flow-through, and desorption/degradation experiments using 50 and 1000μg L-1 atrazine solutions. Results showed that within 30 min of contact time, the control sorbed from 22.6 to 36.1% of atrazine in solution;whereas the activated charcoal cloths sorbed from 76 to 99% of atrazine in solution (SW > KT > DW). The flow-through ex-periments showed that the SW sorbed 88.2, 76.1, and 52.2%of atrazine at the contact time of 0.75, 5, and 10 min, respectively. After 28 days of incubation, previously sorbed atrazine on the SW cloth did not degrade and mproving atrazine removal in water in pollution control structures.

关键词： Atrazine Activated charcoal Water quality Pesticide Cloth

Hybridisation in kiwi(Apteryx;Apterygidae)requires taxonomic revision for the Great Spotted Kiwi

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Avian Research 2021年第2期12卷 195-207页

作者： Lara D.Shepherd Alan J.D.Tennyson Hugh A.Robertson Rogan m.Colbourne Kristina m.Ramstad museum of New Zealand Te Papa Tongarewa Wellington 6011New Zealand Biodiversity Group Department of Conservation PO Box 10420Welling-ton 6011New Zealand Department of Biology and Geology University of South Carolina Aiken471 University ParkwayAikenSC 29801USA

Background:Kiwi(Apteryx spp.)are flightless ratites from New Zealand whose numbers and distributions have declined following human *** of the kiwi species are known to hybridise but the extent of hybridization is ***:We reviewed hybridisation in kiwi(Apteryx spp.)and present new genetic data examining the extent of hybridisation between Rowi(***)and Little Spotted Kiwi(***)at Okarito,the location of the only remaining natural population of the threatened *** also genetically examined the syntype specimens of *** Potts,1872,collected from near Okarito in the 1870s,which have unusual ***:We found evidence of recurrent hybridisation between Rowi and Little Spotted Kiwi over the last 150 years,including one F1 hybrid found in the last 15 years,despite Little Spotted Kiwi’s likely extinction on the mainland in the ***,we found little evidence of introgression of Little Spotted Kiwi alleles into the extant Rowi *** syntype specimens of *** were also found to be hybrids between Little Spotted Kiwi and ***:Our genetic analyses indicate that,although we detected multiple instances of hybridisation between Rowi and Little Spotted Kiwi,it does not appear to be an ongoing threat to *** the syntype specimens of *** are hybrids and therefore not representative of the prevailing usage of the name for the Great Spotted Kiwi(***),we resurrect the nomen oblitum *** Sclater and Hochstetter,1861 for the large spotted kiwi species.

关键词： Apteryx Apteryx haastii DNA Hybridisation Kiwi Taxonomy

Properties of Evaporated Si_(1-x)Sn_x and Si_(1_x)Sn_x:H Amorphous Alloys

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Journal of materials Science & Technology 1993年第2期9卷 79-88页

作者： m.Vergnat m.Gerl Laboratoire de métallurgie Physique et Science des maériaux (U.R.A.au C.N.R.S.No. 155) Universite de Nancy 1 France

Amorphous Si_(1-x)Sn_x alloys have been prepared by co-evaporation onto substrates maintained at liquid nitrogen temperature. Their atomic structure is investigated using density measurements, scanning high-energy electron diffraction and mossbauer spectroscopy. The optical and electrical properties are reported. Then, a method to hydrogenate the films during the evaporation process is described and applied to the preparation of amorphous semiconductors from pure silicon to pure tin. Finally, multilayers of type Si / Si:H / ... or Si:H / Si:D / ... are studied. The modulation of hydrogen is shown by low-angle neutron scattering and measurements of hydrogen diffusivity are presented.

关键词： amorphous alloy evaporation hydrogenation

A modified Non-Uniform DmT Transceiver for the Digital Subscriber Line

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China Communications 2007年第4期4卷 40-44页

作者： Sobia Baig m.Junaid mughal Faculty of Electronic Engineering GIK Institute of Engineering Sciences & TechnologyTopiDistrict Swabi-23460NWFPPakistan

A Non-Uniform Discrete-multitone(DmT) transceiver can help mitigate the channel-noise enhancement,attributed to zero-forcing equalization (ZFE) technique,by splitting the channel frequency response into octave spaced *** paper presents a novel quantitative analys is of the channel-noise enhancement in different subbands of the Non-Uniform DmT *** order to improve the bit error rate(BER) performance,a modified Non-Uniform DmT transceiver is *** BER performance of the modified Non-Uniform DmT system is compared with that of the Non-Uniform DmT and conventional DmT systems in a Digital Subscriber Line(DSL).

关键词： Non-Uniform DmT wavelet filter banks zero-forcing equalization