نتایج جستجو برای: metro depot
تعداد نتایج: 8879 فیلتر نتایج به سال:
BACKGROUND Nearly 40 years of research provides an extensive body of evidence about human health, well-being, and improved function benefits associated with experiences of nearby nature in cities. OBJECTIVES We demonstrate the numerous opportunities for future research efforts that link metro nature, human health and well-being outcomes, and economic values. METHODS We reviewed the literatu...
0. Abstract Portland Metro presents its version of a regional economic model with embedded input-output coefficients as explanatory variables in the model's employment sector equations. The Metro model implements the integration strategy as described by Coomes et al (1991), Stover (1994), and Rey (1997). Coomes et al first described the I-SAMIS model technique for linking I-O and econometric mo...
Is there a causal connection between house prices and labor force participation of married women? The simple correlation between house prices and married women’s labor force participation across U.S. metro areas is positive. Plausible, informal arguments have been advanced to support causation in either direction: prices raising participation (negative income effects of higher house prices lead...
Rail transit is developing rapidly in major cities of China and has become a key component of urban transport. Nevertheless, the security and reliability in operation are significant issues that cannot be neglected. In this paper, the network and station vulnerabilities of the urban rail transit system were analyzed based on complex network and graph theories. A vulnerability evaluation model w...
Suitable selection of the emergency alternatives is a critical issue in emergency response system of Unattended Train Operation (UTO) metro system of China. However, there is no available method for dispatcher group in Operating Control Center (OCC) to evaluate the decision under emergency situation. It was found that the emergency decision making in UTO metro system is relative with the prefer...
Abstract This paper develops new solution procedures for the order picker routing problem in U-shaped picking zones with a movable depot, which has so far only been solved using simple heuristics. The presents first exact approach, based on combinatorial Benders decomposition, as well heuristic approach dynamic programming that extends idea of venerable sweep algorithm. In computational study, ...
OBJECTIVE Non-adherence is a major problem in the treatment of schizophrenia. Depot antipsychotic drugs are thought to reduce relapse rates by improving adherence, but a systematic review of long-term studies in outpatients is not available. METHOD We searched the Cochrane Schizophrenia Group's register, ClinicalTrials.gov, Cochrane reviews on depot medication, and the reference sections of i...
among numerous np-hard problems, the traveling salesman problem (tsp) has been one of the most explored, yet unknown one. even a minor modification changes the problem’s status, calling for a different solution. the generalized traveling salesman problem (gtsp)expands the tsp to a much more complicated form, replacing single nodes with a group or cluster of nodes, where the objective is to fi...
Nowadays transportation problems are drawing more attention with respect to increasing demand for receiving products and services due to population increase and expansion of cities. One of the most important issues of transportation problems which are drawing the attention of the most researchers is vehicle routing problem. In this research, a new linear integer programming for multi-depot vehi...
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