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Primary care research databases provide a significant resource for health services and epidemiological research. However since data are recorded primarily for clinical care their suitability for research may vary widely according to the research application or recording practices of individual general practitioners. A methodological approach for characterising data quality is required. We describe...
This paper introduces a method of calculation of a wide viewing angle for a 3D TV video wall using the height and the number of display devices used for displaying the 3D contents. The proposed viewing angle calculation is basically designed to reduce the crosstalk issue when the viewer's eye level is not in the middle of the 3D video wall screen standing in the fixed position. The principal of the...
Most evolutionary algorithms utilize the posteriori knowledge learned from the running process to guide the search. It is arguable that the priori knowledge about the problems to tackle can also play an important role in problem solving. To demonstrate the importance of both priori and posteriori knowledge, in this paper, we proposes a decomposition based estimation of distribution algorithm with...
Paraphrase detection has several important applications in natural language processing. Examples of such applications include language translation, text summarization, question answering, plagiarism detection, and online information retrieval. A number of metrics have been proposed in the literature to quantify the textual similarity between two sentences. However, the accuracy of utilizing each similarity...
Harmony search algorithm is a good intelligent optimization algorithm, but it is not high robustness and large random. So combining variable metric method of the better local search ability, Harmony Search Algorithm based on variable metric method is proposed. Giving the theory of the basic harmony search algorithm and variable metric method, the specific processes of the improved algorithm is analyzed,...
Social networks are very dynamic objects, since new edges and vertices are added to the graph over the time. Link prediction is an important task in social network analysis and is useful in many application domains. In the recent years, there is significant interest in methods that represent the social network in the form of a graph and leverage topological and semantic measures of similarity between...
Quantile is one of the major metrics used in risk management. Since qauantile represents the downside risk. In this paper, we present a new variant of Nelder-Mead method (NM) for quantile-based stochastic optimization, called Stochastic Nelder-Mead Simplex Method for Quantile (SNM-Q), that aims to minimize the downside of decisions made in stochastic environments. An extensive numerical study shows...
Distributed systems in which users consume and supply different types of services and resources are becoming ever more prevalent. For the matching of consumers and providers, preference-based two-sided matching algorithms can be used to improve the efficiency of the overall match outcome. In such systems, requesting (providing) users rank others based on preferences derived from feedback. Trust can...
We give single-operations characterizations for submodular and supermodular functions on lattices that have monotonicity properties. We associate to such functions metrics on lattices and we investigate corresponding metrics on the sets of partitions.
Information dissemination applications (e.g. weather, news, advertisements, traffic, and so on) are among the most promising ones for vehicular networks. However, disseminating information to all vehicles in vehicular networks is not a trivial task because of their specific characteristics like high dynamic topology and different density values along time and space. The proposals found in literature...
The advent of the Internet has provided people around the world with access to information and services from across the globe that is published without any mediation by governments or other agencies. However, access to this information and services may be restricted within the viewer's own country by their Government, Internet Service Providers, employers and families among others. The motivations...
The simulated binary crossover operator is an important variation operator in evolutionary algorithms. The experimental results reported in this work are a detailed study for the distribution index parameter of this operator. The results are for NSGAII algorithm. The results are interesting regarding three metrics: hypervolume, inverted generational distance and spread.
The advance of social computing study is grown very fast to the extents that influence many aspects of our daily life. One of those aspects is implementation in marketing / advertising. We are always looking for the effective way to understand our market, but the absent of powerful metrics has cause some problem. The availibility of Big Data all around us has triggered a new perspective on how we...
In this paper, a fast-sorting method called summation of normalized objectives and diversified selection (SNOV-DS) is embedded in Comprehensive Learning Particle Swarm Optimization (CLPSO) to solve multi-objective problems. Due to this method, the simulation time will be decreased. The convergence to true Pareto front and the spread of solutions can also be improved. The algorithm is tested on a set...
Our research aim was twofold; a) to determine if maternal physical activity during pregnancy would influence the development of fetal cardiac autonomic control and b) whether HRV could serve as a sensitive indicator of fetal programming effects. Pregnant women with singleton pregnancies participated in a longitudinal study. Magnetocardiograms (MCG) were recorded during pregnancy and when infants reached...
Survivability is an important guarantee of the combat system under network combat environment. To appraise a system properly, it's necessary to establish a valid method for evaluating the survivability. According to the characteristics of network war system, this paper studies the primary factors which have important influence on the survivability of such a system, and then abstracts these metrics...
Information centric networks (ICNs) allow content objects to be cached within the network, so as to provide efficient data delivery. Existing works on in-network caches mainly focus on minimizing the redundancy of caches to improve the cache hit ratio, which may not lead to significant bandwidth saving. On the other hand, it could result in too frequent caching operations, i.e., cache placement and...
Daily, vehicles in transit in a city and during their trajectories encounter other vehicles. The regularity of these encounters is influenced by several elements, such as: vehicle's speed, destinations, traffic conditions, and the period of the day. It is possible to justify these elements by road conditions and the driver's behavior. People have routines and similar behaviors, which strongly impact...
The municipal solid waste collected from Chatham-Kent is currently disposed to the Ridge Landfill in Blenheim, Ontario. Although the municipality implements recycling, the program does not include separate collection and processing of organic food waste. This paper presents an economic evaluation of composting alternatives for the organic food waste collected from households in Chatham-Kent. A cost-benefit...
This paper presents a variation on the reverse p-median problem that does not require that the facilities are placed as an input to the problem. The variation, which will be referred to as the p-median problem with edge reduction, requires solving the p-median problem and the reverse p-median problem together. This paper presents a series of algorithms for solving the 1- and 2-median problems with...
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