ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
4-2-3 اکتشاف محلی
4-3 تابع هدف و محدودیت ها (قیود)
5- نتایج عددی
5-1 مقایسه مقادیر واقعی
5-2 مقایسه جواب های بدست آمده
5-3 آزمایشات دیگر
5-3-1 مدل بدون انتقال
5-3-2 حساسیت به مجموعه ای از فراوانی های ممکن
5-3-3 حساسیت نسبت به جواب اولیه
5-4 کاربرد برای یک نمونه در اندازه بزرگ
6- نتیجه گیری و کار بیشتر
We study the transit frequency optimization problem, which aims to determine the time interval between subsequent buses for a set of public transportation lines given by their itineraries, i.e., sequences of stops and street sections. The solution should satisfy a given origin–destination demand and a constraint on the available fleet of buses. We propose a new mixed integer linear programming (MILP) formulation for an already existing model, originally formulated as a nonlinear bilevel one. The proposed formulation is able to solve to optimality real small-sized instances of the problem using MILP techniques. For solving larger instances we propose a metaheuristic which accuracy is estimated by comparing against exact results (when possible). Both exact and approximated approaches are tested by using existing cases, including a real one related to a small-city which public transportation system comprises 13 lines. The magnitude of the improvement of that system obtained by applying the proposed methodologies, is comparable with the improvements reported in the literature, related to other real systems. Also, we investigate the applicability of the metaheuristic to a larger-sized real case, comprising more than 130 lines.