5,157 research outputs found
INTEGER RELAXATION ON BINARY QUADRATIC PROGRAMMING FOR BATCHING AND SEQUENCING IN SINGLE FORMULATION TO MINIMIZE TOTAL ACTUAL FLOW TIMES CRITERIA
This paper examines batch scheduling problem that has batching and sequencing in single formulation
for multiple-item case. The first step is to develop a model for single item single resource discussed in Zahedi
(2008). The model determined batch sizes and their schedule simultaneously in single item case. This paper
develops the model and algorithm for multiple-item case. The model functions to minimize total actual flow
times. An algorithm for the model is developed using a relaxation of the binary constraints. The binary values
for the decision variables are obtained from steps provided in algorithm. A numerical experience showing
characteristics of this problem is presented
METODE PENGENDALIAN PERSEDIAAN BAHAN BAKU CRUDE COCONUT OIL YANG OPTIMAL PADA PT. PSE
Sistem persediaan merupakan salah satu fungsi manajerial yang sangat penting, karena
mayoritas perusahaan melibatkan investasi besar pada aspek ini, demikian juga bagi PT. Palko
Sari Eka yang banyak menggunakan persediaan dalam bidang perencanaan dan pengendalian
produksinya. PT. Palko Sari Eka sebagai salah satu perusahaan yang bergerak dalam industri oil
refinery, ingin mencoba mengoptimalkan inventory bahan baku Crude Coconut Oil dengan
mencoba membandingkan berbagai metode pengendalian persediaan seperti metode EOQ
(Economic Order Quantity, metode EOI (Economic Order Interval), metode Min-Max. Dimana
Crude Coconut Oil merupakan salah satu bahan baku utama produk, yang membutuhkan suatu
sistem persediaan yang baik. Dari hasil penelitian yang dilakukan, ternyata data demand bersifat
stochastic, maka perlu juga melakukan simulasi untuk mendapatkan hasil yang lebih mendekati
kenyataan. Kemudian dari hasil formulasi rumus dan hasil dari simulasi dianalisa manakah
metode pengendalian persediaan yang paling baik. Maka didapatlah hasil bahwa metode yang
paling baik adalah Fixed Order Size Systems (EOQ) dengan melakukan pesanan sebesar 2770 mT
setiap pesananny
On a Deterministic Property of the Category of -almost Primes: A Deterministic Structure Based on a Linear Function for Redefining the -almost Primes (, ) in Certain Intervals
In this paper based on a sort of linear function, a deterministic and simple
algorithm with an algebraic structure is presented for calculating all (and
only) -almost primes ( , ) in
certain interval. A theorem has been proven showing a new deterministic
property of the category of -almost primes. Through a linear function that
we obtain, an equivalent redefinition of the -almost primes with an
algebraic characteristic is identified. Moreover, as an outcome of our
function's property some relations which contain new information about the
-almost primes (including primes) are presented.Comment: 10 pages. Accepted and presented article in the 11th ANTS, Korea,
2014. The 11th ANTS is one of international satellite conferences of ICM
2014: The 27th International Congress of Mathematicians, Korea. (Expanded
version
Analyzing readerships of International Iranian publications in Mendeley: an altmetrics study
In this study, the presence and distribution of both Mendeley readerships and
Web of Science citations for the publications published in the 43 Iranian
international journals indexed in Journal Citation Reports have been
investigated. The aim was to determine the impact, visibility and use of the
publications published by the Iranian international journals in Mendeley
compared to their citation impact; furthermore, to explore if there is any
relation between these two impact indicators (Mendeley readership counts and
WoS citation counts) for these publications. The DOIs of the 1,884 publications
used to extract the readerships data from Mendeley REST API in February 2014
and citations data until end of 2013 calculated using CWTS in-house WoS
database. SPSS (version 21) used to analyze the relationship between the
readerships and citations for those publications. The Mendeley usage
distribution both at the publication level (across publications years, fields
and document types) and at the user level (across users disciplines, academic
status and countries) have been investigated. These information will help to
understand the visibility and usage vs citation pattern and impact of Iranian
scientific outputs.Comment: in Persia
Quantifying Morphological Computation
The field of embodied intelligence emphasises the importance of the
morphology and environment with respect to the behaviour of a cognitive system.
The contribution of the morphology to the behaviour, commonly known as
morphological computation, is well-recognised in this community. We believe
that the field would benefit from a formalisation of this concept as we would
like to ask how much the morphology and the environment contribute to an
embodied agent's behaviour, or how an embodied agent can maximise the
exploitation of its morphology within its environment. In this work we derive
two concepts of measuring morphological computation, and we discuss their
relation to the Information Bottleneck Method. The first concepts asks how much
the world contributes to the overall behaviour and the second concept asks how
much the agent's action contributes to a behaviour. Various measures are
derived from the concepts and validated in two experiments which highlight
their strengths and weaknesses
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