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Micro-landform Changing due to Urban Development,Case Study:Shiraz Metropolis in the Period of 1967-2018

Journal of Earth Science and Engineering 2018年第2期8卷 83-91页

作者： jamali meysam Moghimi Ebrahim Department of Education of Fars Province ShirazIran Geography Faculty University of TehranIran

The present research aims to investigate the geomorphological changes of the city lands due to the physical development of Shiraz during the years ***,to find out the type and amount of changes in this area,images of Landsat sensor+MSS,TM,ETM,for years(1976,1986,1996,2006,and 2018),and aerial photographs of Shiraz at a scale of 1:20,000 in 1967,as well as the map and statistics of the demographic changes of the city during the above years have been ***4.8 and ArcGis10.3 software have been used to process and interpret satellite imagery and to provide intended ***,the land cover and land use for Shiraz metropolis and its surroundings were derived and the changes of agricultural and barren lands to urban use were identified using the changes detection by post-classification comparison images *** results of this research show that during the 50 years of study,the area of this metropolis and its population was increased around 12 and 6 times *** changes were mainly due to human activities,including the effects of urban development on the landforms and lands around the Shiraz,such as changes in the steep slopes of the mountains and the canals(from the north),expansion of the city on loose formations with low strength(from northwest and west),development of the city in the areas where groundwater levels are high and also the flood plain(from south and east).

关键词： Urban geomorphology micro-landform changing urban development Shiraz remote sensing GIS.

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Improvement of the thermoelectric efficiency of pyrene-based molecular junction with doping engineering

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Chinese Physics B 2017年第12期26卷 201-209页

作者： Mohammad Farid jamali meysam Bagheri Tagani Hamid Rahimpour Soleimani Computational Nanophysics Laboratory(CNL) Department of Physics University of Guilan Rasht P. O. Box 41335-1914 Iran

In this study, the thermoelectric properties of pyrene molecule doped with boron and nitrogen atom at different sites of molecule are investigated using density functional theory and none-equilibrium Greens function formalism in the linear response regime. Our calculations show that when the impurities are added to the edge of the molecule, the anti-resonant peaks will appear in the transmission diagram in the vicinity of the Fermi energy level. So it increases the thermoelectric figure of merit of the system in comparison with the one that the impurity is located in the center of molecule. Additionally, the seebeck coefficient signs are not the same among the B, N, and N ＆ B doped devices, indicating that the types of the carriers can be changed with different types of doping.

关键词： thermopower pyrene density functional theory none-equilibrium Green's function method doping

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