نتایج جستجو برای: road managers
تعداد نتایج: 122801 فیلتر نتایج به سال:
Muller, and P. R. Renne, Department of Physics, University of California, Berkeley, California 94720, USA, Presently at Chicago Center for Cosmochemistry and Department of Geophysical Sciences, University of Chicago, Chicago, Illinois 60637, USA ([email protected]), Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA, Berkeley Geochronology Center, 2755 Ridge Road, ...
forest road construction is the most costly operation in forestry. road designing and construction in unsuitable areas may increase construction and maintenance costs and also cause many environmental impacts. therefore, it is required to pay more attention to forest road design. in this research, we tried to introduce an appropriate method for locating forest roads using gis and ahp simultaneo...
کاربرد مدلسازی صدای ترافیک در تعیین منطقه اثر بوم شناختی جادهها در زیستگاههای طبیعی استان لرستان
Noise pollution of roads can propagate within a broader extent than the road only. This spatial space is called "road ecological effect zone" which is known as the natural areas exposed by 40 dB or greater noise level in both sides of the road. In this study, using Calculation of Road Traffic Noise (CRTN) model, the propagation range of noise from Lorestan road network was simulated. Then, the ...
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