In this paper, a novel mathematical model for a preemption multi-mode multi-objective resource-constrained project scheduling problem with distinct due dates and positive and negative cash flows is presented. Although optimization of bi-objective problems with due dates is an essential feature of real projects, little effort has been made in studying the P-MMRCPSP while due dates are included i...

In decentralized construction projects, costs are mostly related to investment, material, holding, logistics, and other minor costs for implementation. For this reason, simultaneous planning of these items and appropriate scheduling of activities can significantly reduce the total costs of the project undertaken. This paper investigates the decentralized multiple construction projects schedulin...

An algorithm to extract key features from a soccer video is proposed. In this algorithm, the soccer field, individual players and the ball are detected and tracked in each frame. The work done can be used as a basis for robust feature extraction of soccer games that can be expanded to provide automated analysis, interpretation of soccer games. Keywords-Soccer, analysis, field, player, ball, det...

This paper proposes an interpretation theoretical model of the Aufbau of Rudolf Carnap, this interpretation contributes to upgrade the project original carnapian, in the sense of conferring to the constitutional program of construction logical, less committed analytic equipment with an ontology or clearly defined epistemology. The setting in phenomenal logical reconstruction practice is elabora...

The 1-searcher is a mobile guard whose visibility is limited to a ray emanating from his position, where the direction of the ray can be changed continuously with bounded angular rotation speed. Given a polygonal region P with a speciied boundary point d, is it possible for a 1-searcher to eventually see a mobile intruder that is arbitrarily faster than the searcher within P, before the intrude...

rangeland plans as an management option is subject that by giving range to beneficiaries beneficiaries will be identified in the plans whit specific programs. the purpose of this study is to identify factors affecting the performance of rangelands schemes and consequently to rank the projects in razavi khorasan by identified factors. six original schemes in razavi khorasan were selected for thi...

We present here the general transformation that leaves unchanged the form of the field equations for perfect fluid cosmologies in the DGP braneworld model. Specifically, a prescription for relating exact solutions with different equations of state is provided, and the symmetries found can be used as algorithms for generating new cosmological models from previously known ones. We also present, i...

Recall from last time that we are working towards a 2-approximation algorithm for 1|prec|∑wjCj. We will focus on initial sets S, which have the property that if j ∈ S and k → j then k ∈ S. We defined ρ(S) = w(S) p(S) , and S ∗ to be an initial set with maximum ρ(S) over all initial sets S. Our algorithm finds S∗, finds a 2-approximate schedule for S∗ respecting precedence constraints, and then ...

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