Results 21 to 30 of about 24,734 (245)

Calibration of agricultural risk programming models using positive mathematical programming [PDF]

Australian Journal of Agricultural and Resource Economics, 2020
Mathematical programming models of farmers’ cropping decisions must first be calibrated before they can be used to examine agricultural producer responses to policy changes. In this paper, we compare three calibration approaches for disentangling the risk parameter from the parameters of the cost function: one assumes a logarithmic utility function ...
Xuan Liu, Gerrit Cornelis van Kooten, Jun Duan   +2 more
openaire   +1 more source

Modules over monads and operational semantics (expanded version) [PDF]

Logical Methods in Computer Science, 2022
This paper is a contribution to the search for efficient and high-level mathematical tools to specify and reason about (abstract) programming languages or calculi.
André Hirschowitz, Tom Hirschowitz, Ambroise Lafont   +2 more
doaj   +1 more source

A Hybrid Hydro-Economic Framework to Allocate Water over the Basin Scale Region under the Water Shortage Periods

Journal of Applied Science and Engineering, 2023
The present study proposed a hydro-economic framework for water allocation within the Zayande-Rud basin located in Iran, including urban, industry, agriculture, and environmental sectors as water users.
Dake Xu
doaj   +1 more source

An integrated PMP model to assess the development of agro-energy crops and the effect on water requirements

Bio-based and Applied Economics, 2013
This paper presents an integrated model for the economic and environmental assessment of the use of natural resources when new activities (i.e. biomass crops for energy production) are introduced into the farm production plan. The methodology is based on
Michele Donati, Diego Bodini, Filippo Arfini, Annalisa Zezza   +3 more
doaj   +1 more source

Determining the Appropriate Economic Strategy to Conserve Groundwater Resources in Qazvin Plain [PDF]

Rāhburdhā-yi tusi̒ah-i rūstāyī, 2016
Qazvin plain is one of the capable plains in Iran to produce of agricultural goods. Unfortunately, due to inordinate shafts digging and irregular use of groundwater the level of groundwater has been decreased during two last decades so that water balance
Abozar Parhizkari, Mahdi Khodadadi Hoseyni, Hossein Taghizade Ranjbari, Abolfazle Mahmoodi   +3 more
doaj   +1 more source

Assessing the Impacts of Rural Development Plan Measures on the Sustainability of Agricultural Holdings Using a PMP Model

Land, 2021
Rural Development Plan (RDP) measures support farmers in improving the sustainability of their agricultural holdings. The implementation of these policies has economic, social, and environmental impacts, which are monitored either ex-ante, ongoing, or ex-
Christina Moulogianni, Thomas Bournaris
doaj   +1 more source

Enhanced Index Fund Construction using Robust possiblistic programming [PDF]

فصلنامه بورس اوراق بهادار, 2020
One of the main concerns of modeling is the adaptation of the mathematical model to reality, and in the real world of uncertainty one of the decisive cases ignored in the classical mathematical programming of these uncertainties.
Maghsoud amiri, shima shahsavari, sajad lak chalsepary   +2 more
doaj   +1 more source

The Impacts of Water Pricing and Non-Pricing Policies on Sustainable Water Resources Management: A Case of Ghorveh Plain at Kurdistan Province, Iran

Energies, 2019
As with other regions of Iran, due to excessive extraction of groundwater for intense agricultural activity, Ghorveh plain, a water-scarce irrigation district in the west of Iran, has faced a serious water crisis during the last decade. The present study
Mohammad Ali Asaadi, Seyed Abolghasem Mortazavi, Omid Zamani, Gholam Hassan Najafi, Talal Yusaf, Seyed Salar Hoseini   +5 more
doaj   +1 more source

Water saving role and environmental impacts of price liberalization in agriculture: An experience in Iran [PDF]

Caspian Journal of Environmental Sciences
Government intervention in the agricultural market, including guaranteed purchases and subsidy payments, has raised many environmental concerns due to the resulting pressure on and pollution of natural resources.
Hamidreza Gerami, Seyed Nematollah Moosavi, Abbas Aminifard   +2 more
doaj   +1 more source

How did farmers act? Ex-post validation of linear and positive mathematical programming approaches for farm-level models implemented in an agent-based agricultural sector model

Bio-based and Applied Economics, 2020
This study evaluates linear programming (LP) and positive mathematical programming (PMP) approaches for 3,400 farm-level models implemented in the SWISSland agent-based agricultural sector model.
Gabriele Mack, Ali Ferjani, Anke Möhring, Albert von Ow, Stefan Mann   +4 more
doaj   +1 more source