since the pressure of hydrocarbon reservoirs drops due to production, in order to keep the production rate constant or increase enhanced recovery, few methods are used. one of which is gas injection to the reservoir. on the other hand, due to reduction in oil production potential of aghajari oil field, gas injection is highly required to pressurize and enhance oil recovery. there is a possibili...

Following Hubbert’s successful prediction of the timing of US peak oil production, Hubbert’s model has been used extensively to predict peak oil production elsewhere. However, forecasts of world and regional peak oil and natural gas production using Hubbert’s methodology usually have failed, leading to the implicit belief that such predictions always will fail and that we need not worry about f...

Does producing staple food locally cause fewer greenhouse gas emissions than food sourced through imports from another continent? To address this question we used a spatial optimization approach that minimized greenhouse gas emissions from production and transport of five food commodities (barley, maize, oil, sugar and wheat) and compared this to a setting of local production where distances be...

in this paper, we present a genetic algorithm (ga) for optimization of a multi-mode resource constrained time cost trade off (mrctct) problem. the proposed ga, each activity has several operational modes and each mode identifies a possible executive time and cost of the activity. beyond earlier studies on time-cost trade-off problem, in mrctct problem, resource requirements of each execution mo...

The present article studies and analyses plan and planning in Iran with respect to parameters of the idea of formation, birth, objectives, strategy and its functioning. Iran has half-a-century record of planning, and has implemented 7 constructional and developmental plans so far (5 plans before and 2 plans after the Revolution). Right now, Iran is implementing her third developmental plan. Two...

the aims of this study were to assess the energy and economic flows of biodiesel production from olive pomace oil using transesterification method with ultrasound waves. for this purpose biodiesel production from this feedstock were examined through a life-cycle process with considering five main stages of agricultural production, transportation, olive oil extraction, pomace oil extraction and ...

Market-based techniques represent a general approach to resource allocation in decentralized environments. In dynamic situations, the ability to find effective allocations of resources without central information and control is a crucial element of adaptivity. The Michigan Adaptive Resource eXchange (MARX) Project has developed market models for a variety of resource allocation problems--both c...

In this paper we propose a model for measurementbased network configuration. In the model, resource allocation is based on provisioning cycles, whereby monitoring is used to build a matrix with expected traffic patterns. Such a matrix drives the subsequent network configuration phase, which is performed via a hybrid Traffic Engineering approach, combining both off-line and on-line algorithms. F...