14 research outputs found
Non-redundant rare itemset generation
Rare itemsets are likely to be of great interest because they often relate to high-impact transactions which may give rise to rules of great practical signi cance. Research into the rare association rule mining problem has gained momentum in the recent past. In this paper, we propose a novel approach that captures such rare rules while ensuring that redundant rules are eliminated. Extensive testing on real-world datasets from the UCI repository con rm that our approach outperforms both the Apriori-Inverse(Koh et al. 2006) and Relative Support (Yun et al. 2003) algorithms
Mining Fuzzy Coherent Rules from Quantitative Transactions Without Minimum Support Threshold
[[abstract]]Many fuzzy data mining approaches have been proposed for finding fuzzy association rules with the predefined minimum support from the give quantitative transactions. However, some comment problems of those approaches are that (1) a minimum support should be predefined, and it is hard to set the appropriate one, and (2) the derived rules usually expose common-sense knowledge which may not be interested in business point of view. In this paper, we thus proposed an algorithm for mining fuzzy coherent rules to overcome those problems with the properties of propositional logic. It first transforms quantitative transactions into fuzzy sets. Then, those generated fuzzy sets are collected to generate candidate fuzzy coherent rules. Finally, contingency tables are calculated and used for checking those candidate fuzzy coherent rules satisfy four criteria or not. Experiments on the foodmart dataset are also made to show the effectiveness of the proposed algorithm.[[incitationindex]]EI[[conferencetype]]國際[[conferencedate]]20120610~20120615[[iscallforpapers]]Y[[conferencelocation]]Brisbane, Australi
Comparison of deposition methods of ZnO thin film on flexible substrate
This paper reports the effect of the different deposition methods towards the ZnO nanostructure crystal quality and film thickness on the polyimide substrate. The ZnO film has been deposited by using the spray pyrolysis technique, sol-gel and RF Sputtering. Different methods give a different nanostructure of the ZnO thin film. Sol gel methods, results of nanoflowers ZnO thin film with the thickness of thin film is 600nm. It also produces the best of the piezoelectric effect in term of electrical performance, which is 5.0 V and 12 MHz of frequency which is higher than other frequency obtained by spray pyrolysis and RF sputtering
Big Data and Climate Change
open access articleClimate science as a data-intensive subject has overwhelmingly affected by the era of big data and relevant technological revolutions. The big successes of big data analytics in diverse areas over the past decade have also prompted the expectation of big data and its efficacy on the big problem—climate change. As an emerging topic, climate change has been at the forefront of the big climate data analytics implementations and exhaustive research have been carried out covering a variety of topics. This paper aims to present an outlook of big data in climate change studies over the recent years by investigating and summarising the current status of big data applications in climate change related studies. It is also expected to serve as a one-stop reference directory for researchers and stakeholders with an overview of this trending subject at a glance, which can be useful in guiding future research and improvements in the exploitation of big climate data
Universal Design Rules from Product Pairs and Association Rule Based Learning
A product pair is two products with similar functionality that satisfy the same
high level need but are different by design. The goal of this research is to apply
association rule-based learning to product pairs and develop universal design rules to be
used during the conceptual design phase. The Apriori algorithm produced 1,023
association rules with input parameters of 70% minimum confidence and 0.5%
minimum support levels. These rules were down-selected based on the prescribed rule
format of: (Function, Typical User Activity) ? (Change, Universal User Activity). In
other words, for a given product function and user activity, the rules suggest a design
change and new user activity for a more universal product.
This research presents 29 universal design rules to be used during the conceptual
design stage. These universal design rules suggest a parametric, morphological,
functional, or no design change is needed for a given user activity and product function.
No design change rules confirm our intuition and also prevent inefficient design efforts.
A parametric design change is suggested for actionfunction elements involving find hand
use to manipulate a product. Morphological design changes are proposed to solve actionfunction elements in a slightly more complex manner without adding or
subtracting overall functionality. For example, converting human energy to mechanical
energy with the upper body opposed to the lower body or actuating fluid flow with
motion sensors instead of manual knobs. The majority of the recommended functional
changes involve automating a product to make it more universal which might not be
apparently obvious to designers during conceptual design
Adapting ADA Architectural Design Knowledge to Product Design: Groundwork for a Function Based Approach
Disability is seen as a result of an interaction between a person and that person's
contextual factors. Viewing disability in the context of the built environment, a better
design of this environment helps to reduce the disability faced by an individual. In spite
of significant research in Universal Design (UD), the existing methods provide
insufficient guidance for designers: designers demand more specific examples of, and
methods for, good universal design.
Within the overarching goal of improving universal product design, the specific
goal of this research is to determine if the ADA guidelines for architectural design can
be adapted to product design. A methodology that foresees the accessibility issues while
designing a product would be constructive. The new technique should be built on the
pre-existing principles and guidelines.
A user activity and product function framework is proposed for this translation
using actionfunction diagrams. Specific goals include determining if the function-based
approach is able to anticipate a functional change that improves product accessibility.
Further, generate user activity and product function association rules that can be applied
to the universal design of products.
Proposed research activities are to identify thirty existing universal products and
compare with its typical version to identify the function that introduces an accessibility
feature. Next, categorize the observed changes in a product function systematically and
extract trends from accessible architectural systems to generate rules for universal design
of consumer products. For validation, the task is to select around fifteen consumer
product pairs for validation of the generated rules to determine if the ADA guidelines
can be adapted for universal product design using the proposed framework.
The results of this research show promise in using the International Classification
of Functioning, Disability and Health (ICF) lexicon to model user limitation. The
actionfunction diagram provides a structured way to approach a problem in the early
stage of design. The rules generated in this research translate to products having similar
user-product interface