مشخصات پژوهش

عنوان	Comprehensive Productivity Models for Tracked and Wheeled Skidders in the Hyrcanian Forests of Iran
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	Hyrcanian forests, Productivity, Tracked and Wheeled skidders, Uphill and downhill skidding, Regression models
چکیده	The goals of the study were to develop comprehensive productivity models of skidders for the Hyrcanian forest areas of Iran and to compare the productivities of two existing skidding machine types in order to select the most profitable ones under various operating conditions. Estimating productivity of forest equipment is imperative for forest managers to estimate production costs of logging and for developing a cost efficient logging plan. This paper deals with the performance of ground based harvesting systems (tracked and wheeled skidders) in the mountainous forest of the northern part of Iran. Two regression models for each skidding machine type (one equation for uphill and another for downhill skidding) were developed. In addition, related times for each element of skidding cycle and delay times were determined.
پژوهشگران	محمد رضا مروی مهاجر (نفر پنجم)، علی اصغر درویش صفت (نفر چهارم)، جهانگیر فقهی (نفر سوم)، هوشنگ سبحانی (نفر دوم)، مهتاب پیرباوقار (نفر اول)