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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Journal of Mining and Environment
- نوع مقاله: Journal Article
- کلمات کلیدی: Goal Programming,Transportation,Production optimization,Truck Allocation,Truck Allocation Software
- چکیده:
- چکیده انگلیسی: Truck and shovel operations comprise approximately 60% of the total operating costs in open pit mines. In order to increase productivity and reduce the cost of mining operations, it is essential to manage the equipment used with high efficiency. In this work, the chance-constrained goal programing (CCGP) model presented by Michalakopoulos and Panagiotou is developed to determine an optimal truck allocation plan in open pit mines and reduce the waiting times of trucks and shovels. The developed goal programming (GP) model is established considering four desired goals: “maximizing shovel production”, “minimizing deviations in head grade”, “minimizing deviations in tonnage feed to the processing plants from the desired feed” and “minimizing truck operating costs”. To employ the developed model, a software is prepared in Visual Studio with C# programming language. In this computer program, the CPLEX optimizer software is incorporated for solving the developed goal programing model. The case study of Sungun copper mine is also considered to evaluate the presented GP model and prepared software. The results obtained indicate that the developed model increases the mine production above 20.6% with respect to the traditional truck allocation plan, while meeting the desired grade and the stripping ratio constraints.
- انتشار مقاله: 22-04-1395
- نویسندگان: M. Mohtasham,H. Mirzaei Nasirabad,A. Mahmoodi Markid
- مشاهده
- جایگاه : پژوهشی
- مجله: Journal of Dentistry, Shiraz University of Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی:
- چکیده:
- چکیده انگلیسی: The term ‘Dilated Odontoma’ is a malformation which most frequently occurs in the deciduous, permanent or supernumerary teeth. It can be diagnosed with deep invagination of the enamel inside the crown or root. In other words, the most extreme form of dens in the dente is known as “dilated odontoma”.Although dilated odontomas are usually asymptomatic, their eruption into the mouth can give rise to pain, inflammation, and infection.This report is an attempt to describe the case of a 22-year-old female presenting with bilateral cystic lesions associated with erupted dilated odontomas of the maxilla.The patient had no history of pain but she complained about a recurrent swelling which she was suffering from for about two years. Conventional radiographs showed bilateral cystic lesions associated with dilated odontomas. The findings were also confirmed by Dent Scan. The treatment plan consisted of surgical removal of the lesions, followed by histopathologic study in order to confirm the initial diagnosis.
- انتشار مقاله: 16-05-1392
- نویسندگان: A. Mahmoodi,Sh. Shahidi,Mar. Houshyar,Man. Houshyar
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Science and Technology A:Science
- نوع مقاله: Journal Article
- کلمات کلیدی: Square Map,square root map,vectorial boolean function,component boolean function,asymptotic probability distribution
- چکیده:
- چکیده انگلیسی: The square map is one of the functions used in cryptography. For instance, the square map is used in Rabin
encryption scheme, block cipher RC6 and stream cipher Rabbit, in different forms. In this paper, we study
statistical properties of the output of the square map as a vectorial Boolean function. We obtain the joint
probability distribution of arbitrary number of the upper and the lower bits of the output of square map along with
the asymptotic probability distribution of the upper bits of its output. Based upon a measure for evaluating the
imbalance of maps, we study the imbalance of limit distribution of the restriction of square map to its upper bits.
Last, we introduce the square root map and examine this map as a vectorial Boolean function; we compute
probability distribution of the component Boolean functions of this new map and also obtain the imbalance of the
square root map.- انتشار مقاله: 07-12-1392
- نویسندگان: S. M. Dehnavi,A. Mahmoodi Rishakani,M. R. Mirzaee Shamsabad,E. Pasha
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Fisheries Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Antibacterial activity,Zataria multiflora,Rosmarinus officinalis,Minimum inhibitory concentration (MIC),Essential oils (EO),Anethum graveolens,Eucalyptus globulus
- چکیده:
- چکیده انگلیسی: There is a growing interest of industry to replace synthetic chemicals by natural products with bioactive properties from plant origin. The purpose of this study was to elucidate the factors affecting antimicrobial effectiveness of essential oils Rosmarinus officinalis, Zataria multiflora, Anethum graveolens and Eucalyptus globulus against food spoilage and pathogenic bacteria, Streptococcus iniae the cause of zoonotic streptococcosis in fish. Food conservation is based on an intermittent search for foods with a high nutritional quality and microbial stability and it has been reached by the control of the growth / survival of spoiling and pathogen foodborne microorganisms. Based on several reports, fish streptococcosis is currently considered as one of the main limiting factors in the aquaculture industry, due to the significant economic losses (annually more than $150 million) that these infections cause in different cultured fresh and seawater fish species worldwide. The sensitivity of S. iniae to antibacterial activity of the essential oils was determined using well diffusion assays and paper disc diffusion method. The ranges of minimum inhibitory concentration (MIC) of the oils and extracts were 3.9–250 and 7.8- 500 µg/ml and the ranges of minimum bactericidal concentration (MBC) values for the oils and extracts were found to be in the range of 7.8-250 and 15.6-500 µg/ml, respectively. The essential oils exhibited antibacterial activity against S. iniae. The essential oil of rosemary showed the strongest antimicrobial activity.
- انتشار مقاله: 12-10-1396
- نویسندگان: L. Roomiani,M. Soltani,A. Akhondzadeh Basti,A. Mahmoodi,A. Taheri; Mirghaed,F. Yadollahi
- مشاهده
- جایگاه : پژوهشی
- مجله: Algebraic Structures and Their Applications
- نوع مقاله: Journal Article
- کلمات کلیدی: zero-divisor graph,Nilpotent Graph,Commutative Ring
- چکیده:
- چکیده انگلیسی: Let $R$ be a ring with unity. The undirected nilpotent graph of $R$, denoted by $Gamma_N(R)$, is a graph with vertex set ~$Z_N(R)^* = {0neq x in R | xy in N(R) for some y in R^*}$, and two
distinct vertices $x$ and $y$ are adjacent if and only if $xy in N(R)$, or equivalently, $yx in N(R)$, where $N(R)$ denoted the nilpotent elements of $R$. Recently, it has been proved that if $R$ is a left Artinian ring, then $diam(Gamma_{N}(R))leqslant 3$. In this paper, using the concept of rank over commutative rings, we investigate basic properties of undirected nilpotent graph of matrix algebras. Moreover, some result on undirected nilpotent graph of matrix algebras over commutative rings are given. For
instance, we prove that $Gamma_{N}(M_{n}(R))$ is not planar for all $ngeqslant 2$. Furthermore, we show that $diam(Gamma_{N}(R))leqslant diam(Gamma_{N}(M_{n}(R)))$ for an
Artinian commutative ring $R$. Also, we prove that $Gamma_{N}(M_{n}(R))congGamma_{N}(M_{n}(T(R)))$, where $T(R)$ be the total quotient ring of a commutative ring $R$- انتشار مقاله: 21-09-1393
- نویسندگان: A. Mahmoodi,A. Mahmoodi,A. Mahmoodi
- مشاهده