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Scheduling Multi-Mode Resource-Constrained Projects Using Heuristic Rules Under Uncertainty Environment

Computers, Materials & Continua 2022年第1期70卷 847-874页

作者： Mohamed Abdel-Basset ahmed sleem Asmaa Atef Yunyoung Nam Mohamed Abouhawwash Faculty of Computers and Informatics Zagazig UniversityZagazig44519Egypt Department of Computer Science and Engineering Soonchunhyang UniversityAsan31538Korea Department of Mathematics Faculty of ScienceMansoura UniversityMansoura35516Egypt Department of Computational Mathematics Scienceand Engineering(CMSE)Michigan State UniversityEast Lansing48824MIUSA

Project scheduling is a key objective of many models and is the proposed method for project planning and *** scheduling problems depend on precedence relationships and resource constraints,in addition to some other limitations for achieving a subset of *** scheduling problems are dependent on many limitations,including limitations of precedence relationships,resource constraints,and some other limitations for achieving a subset of *** project scheduling models consider all information about the scheduling problem such as activity durations and precedence relationships information resources available and required,which are known and stable during the implementation *** concept of deterministic project scheduling conflicts with real situations,in which in many cases,some data on the activity’s durations of the project and the degree of availability of resources change or may have different modes and strategies during the process of project implementation for dealing with multi-mode conditions surrounded by projects and their activity *** the multi-mode resource-constrained project problem is an optimization problem whose minimum project duration subject to the availability of resources is of particular interest to *** use the multi-mode resource allocation and schedulingmodel that takes into account the dynamicity features of all parameters,that is,the scheduling process must be flexible to dynamic environment *** this paper,we propose five priority heuristic rules for scheduling multi-mode resource-constrained projects under dynamicity features for more realistic situations,in which we apply the proposed heuristic rules(PHR)for scheduling multi-mode resource-constrained *** projects are considered test problems for the *** obtained results rendered by these priority rules for the test problems are compared by the results obtained from 10 well-known heuristics rules rendered for

关键词： Constrained resource scheduling multi-mode durations dynamic scheduling resource allocation heuristic rules

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Antihyperglycemic effect of Juniperus phoenicea *** alloxan-induced diabetic rats and diterpenoids isolated from the fruits

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Journal of Coastal Life Medicine 2015年第11期 906-909页

作者： Salma ahmed El-Sawi Hemaia Mohamed Motawae Abdel-Rahman Omar El-Shabrawy Mohamed Aboul-Fotouh sleem Amani Ameen sleem Maii Abdel Naby Ismail Maamoun Pharmacognosy Department National Research CentreCairoEgypt Pharmacognosy Department Faculty of PharmacyCairo UniversityCairoEgypt Pharmacology Department National Research CentreCairoEgypt

Objective:To explore the traditional use of Juniperus phoenicea L.(***)growing in Egypt as antidiabetic ***:The antihyperglycemic activities of the crude 80%ethanol and successive extracts of leaves and fruits of the plant were investigated in alloxan-induced diabetic rats after collecting blood samples through retro-orbital puncture *** a consequence of the biological results,phytochemical investigation of the chloroform fraction of fruits was carried out by column chromatography and thin layer ***:Results revealed the reduction in blood glucose levels in rats,which were significantly different from control at 4 and 8 weeks(P<0.01).The highest antihyperglycemic activity was exhibited by the crude extracts of fruits and leaves of which the potency was 83.6%and 81.9%,respectively,after 8 weeks,comparing to metformin drug(100%potency).Chloroform fractions of leaves and fruits were the most potent fractions(potencies were 70.3%,71.4%),respectively,along with ethyl acetate fraction of fruits(71.4%).Phytochemical investigating of the chloroform fraction of fruits resulted in the isolation and identification of 5 abietane ***,7-dehydroabietanone,sugiol,6-α-hydroxy-7-oxoferruginol,totarolone and a labdane diterpenoid,varodiol were isolated for the first time from the fruits of *** growing in *** identification of these compounds was based on spectroscopic analysis:1hydrogen-nuclear magnetic resonance and electron impact mass spectrometry,comparing the results with the ***:It has become clear that leaves and fruits of the Egyptian *** provide effective antihyperglycemic action in diabetic rats as was reported in folk *** high contents of terpenoids in the non-polar fractions may attribute to the antidiabetic effect of the plant.

关键词： Juniperus phoenicea Antihyperglycemic Abietane Labdane Diterpenoid

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