keyword
MENU ▼
Read by QxMD icon Read
search

Heuristics

keyword
https://www.readbyqxmd.com/read/28634487/dynamic-inertia-weight-binary-bat-algorithm-with-neighborhood-search
#1
Xingwang Huang, Xuewen Zeng, Rui Han
Binary bat algorithm (BBA) is a binary version of the bat algorithm (BA). It has been proven that BBA is competitive compared to other binary heuristic algorithms. Since the update processes of velocity in the algorithm are consistent with BA, in some cases, this algorithm also faces the premature convergence problem. This paper proposes an improved binary bat algorithm (IBBA) to solve this problem. To evaluate the performance of IBBA, standard benchmark functions and zero-one knapsack problems have been employed...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/28633399/the-interfacial-character-of-antibody-paratopes-analysis-of-antibody-antigen-structures
#2
Minh N Nguyen, Mohan R Pradhan, Chandra Verma, Pingyu Zhong
Summary: In this study, computational methods are applied to investigate the general properties of antigen engaging residues of a paratope from a non-redundant dataset of 403 antibody-antigen complexes to dissect the contribution of hydrogen bonds, hydrophobic, van der Waals contacts and ionic interactions, as well as role of water molecules in the antigen-antibody interface. Consistent with previous reports using smaller datasets, we found that Tyr, Trp, Ser, Asn, Asp, Thr, Arg, Gly, His contribute substantially to the interactions between antibody and antigen...
June 15, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28632397/decomposition-algorithms-for-a-multi-hard-problem
#3
M R Przybylek, A Wierzbicki, Z Michalewicz
Real-world optimization problems have been studied in the past, but the work resulted in approaches tailored to individual problems that could not be easily generalized. The reason for this limitation was the lack of appropriate models for the systematic study of salient aspects of real-world problems. The aim of this paper is to study one of such aspects: multi-hardness. We propose a variety of decomposition-based algorithms for an abstract multi-hard problem and compare them against the most promising heuristics...
June 20, 2017: Evolutionary Computation
https://www.readbyqxmd.com/read/28632396/probabilistic-analysis-of-the-1-1-evolutionary-algorithm
#4
Hsien-Kuei Hwang, Alois Panholzer, Nicolas Rolin, Tsung-Hsi Tsai, Wei-Mei Chen
We give a detailed analysis of the optimization time of the (1 + 1)-Evolutionary Algorithm under two simple fitness functions (ONEMAX and LEADINGONES). The problem has been approached in the evolutionary algorithm literature in various ways and with different degrees of rigor. Our asymptotic approximations for the mean and the variance represent the strongest of their kind. The approach we develop is based on an asymptotic resolution of the underlying recurrences and can also be extended to characterize the corresponding limiting distributions...
June 20, 2017: Evolutionary Computation
https://www.readbyqxmd.com/read/28625355/meta-reasoning-monitoring-and-control-of-thinking-and-reasoning
#5
REVIEW
Rakefet Ackerman, Valerie A Thompson
Meta-Reasoning refers to the processes that monitor the progress of our reasoning and problem-solving activities and regulate the time and effort devoted to them. Monitoring processes are usually experienced as feelings of certainty or uncertainty about how well a process has, or will, unfold. These feelings are based on heuristic cues, which are not necessarily reliable. Nevertheless, we rely on these feelings of (un)certainty to regulate our mental effort. Most metacognitive research has focused on memorization and knowledge retrieval, with little attention paid to more complex processes, such as reasoning and problem solving...
June 15, 2017: Trends in Cognitive Sciences
https://www.readbyqxmd.com/read/28620975/decision-heuristic-or-preference-attribute-non-attendance-in-discrete-choice-problems
#6
Sebastian Heidenreich, Verity Watson, Mandy Ryan, Euan Phimister
This paper investigates if respondents' choice to not consider all characteristics of a multiattribute health service may represent preferences. Over the last decade, an increasing number of studies account for attribute non-attendance (ANA) when using discrete choice experiments to elicit individuals' preferences. Most studies assume such behaviour is a heuristic and therefore uninformative. This assumption may result in misleading welfare estimates if ANA reflects preferences. This is the first paper to assess if ANA is a heuristic or genuine preference without relying on respondents' self-stated motivation and the first study to explore this question within a health context...
June 16, 2017: Health Economics
https://www.readbyqxmd.com/read/28618593/wetting-and-dewetting-processes-in-the-axial-retraction-of-liquid-filaments
#7
Pablo D Ravazzoli, Ingrith Cuellar, Alejandro G González, Javier A Diez
We study the hydrodynamic mechanisms involved in the motion of the contact line formed at the end region of a liquid filament laying on a planar and horizontal substrate. Since the flow develops under partially wetting conditions, the tip of the filament recedes and forms a bulged region (head) that subsequently develops a neck region behind it. Later the neck breaks up leading to a separated drop, while the rest of the filament restarts the sequence. One main feature of this flow is that the whole dynamics and final drop shapes are strongly influenced by the hysteresis of the contact angle typical in most of the liquid-substrate systems...
May 2017: Physical Review. E
https://www.readbyqxmd.com/read/28617667/a-heuristic-computational-model-of-basic-cellular-processes-and-oxygenation-during-spheroid-dependent-biofabrication
#8
T J Sego, U Kasacheuski, D Hauersperger, A Tovar, N I Moldovan
An emerging approach in biofabrication is the creation of 3D tissue constructs through scaffold-free, cell spheroid-only methods. The basic mechanism in this technology is spheroid fusion, which is driven by the minimization of energy, the same biophysical mechanism that governs spheroid formation. However, other factors such as oxygen and metabolite accessibility within spheroids impact on spheroid properties and their ability to form larger-scale structures. The goal of our work is to develop a simulation platform eventually capable of predicting the conditions that minimize metabolism-related cell loss within spheroids...
June 15, 2017: Biofabrication
https://www.readbyqxmd.com/read/28617225/a-greedy-alignment-free-distance-estimator-for-phylogenetic-inference
#9
Sharma V Thankachan, Sriram P Chockalingam, Yongchao Liu, Ambujam Krishnan, Srinivas Aluru
BACKGROUND: Alignment-free sequence comparison approaches have been garnering increasing interest in various data- and compute-intensive applications such as phylogenetic inference for large-scale sequences. While k-mer based methods are predominantly used in real applications, the average common substring (ACS) approach is emerging as one of the prominent alignment-free approaches. This ACS approach has been further generalized by some recent work, either greedily or exactly, by allowing a bounded number of mismatches in the common substrings...
June 7, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28616775/informing-reimbursement-decisions-using-cost-effectiveness-modelling-a-guide-to-the-process-of-generating-elicited-priors-to-capture-model-uncertainties
#10
Laura Bojke, Bogdan Grigore, Dina Jankovic, Jaime Peters, Marta Soares, Ken Stein
In informing decisions, utilising health technology assessment (HTA), expert elicitation can provide valuable information, particularly where there is a less-developed evidence-base at the point of market access. In these circumstances, formal methods to elicit expert judgements are preferred to improve the accountability and transparency of the decision-making process, help reduce bias and the use of heuristics, and also provide a structure that allows uncertainty to be expressed. Expert elicitation is the process of transforming the subjective and implicit knowledge of experts into their quantifiable expressions...
June 15, 2017: PharmacoEconomics
https://www.readbyqxmd.com/read/28615745/on-the-interconnection-between-the-higher-order-singular-values-of-real-tensors
#11
Wolfgang Hackbusch, André Uschmajew
A higher-order tensor allows several possible matricizations (reshapes into matrices). The simultaneous decay of singular values of such matricizations has crucial implications on the low-rank approximability of the tensor via higher-order singular value decomposition. It is therefore an interesting question which simultaneous properties the singular values of different tensor matricizations actually can have, but it has not received the deserved attention so far. In this paper, preliminary investigations in this direction are conducted...
2017: Numer Math (Heidelb)
https://www.readbyqxmd.com/read/28608396/information-criteria-for-firth-s-penalized-partial-likelihood-approach-in-cox-regression-models
#12
Kengo Nagashima, Yasunori Sato
In the estimation of Cox regression models, maximum partial likelihood estimates might be infinite in a monotone likelihood setting, where partial likelihood converges to a finite value and parameter estimates converge to infinite values. To address monotone likelihood, previous studies have applied Firth's bias correction method to Cox regression models. However, while the model selection criteria for Firth's penalized partial likelihood approach have not yet been studied, a heuristic AIC-type information criterion can be used in a statistical package...
June 12, 2017: Statistics in Medicine
https://www.readbyqxmd.com/read/28608230/acknowledging-crossing-avoidance-heuristic-violations-when-solving-the-euclidean-travelling-salesperson-problem
#13
Markos Kyritsis, Stephen R Gulliver, Eva Feredoes
If a salesperson aims to visit a number of cities only once before returning home, which route should they take to minimise the total distance/cost? This combinatorial optimization problem is called the travelling salesperson problem (TSP) and has a rapid growth in the number of possible solutions as the number of cities increases. Despite its complexity, when cities and routes are represented in 2D Euclidean space (ETSP), humans solve the problem with relative ease, by applying simple visual heuristics. One of the most important heuristics appears to be the avoidance of path crossings, which will always result in more optimal solutions than tours that contain crossings...
June 12, 2017: Psychological Research
https://www.readbyqxmd.com/read/28601709/from-information-processing-to-decisions-formalizing-and-comparing-psychologically-plausible-choice-models
#14
Daniel W Heck, Benjamin E Hilbig, Morten Moshagen
Decision strategies explain how people integrate multiple sources of information to make probabilistic inferences. In the past decade, increasingly sophisticated methods have been developed to determine which strategy explains decision behavior best. We extend these efforts to test psychologically more plausible models (i.e., strategies), including a new, probabilistic version of the take-the-best (TTB) heuristic that implements a rank order of error probabilities based on sequential processing. Within a coherent statistical framework, deterministic and probabilistic versions of TTB and other strategies can directly be compared using model selection by minimum description length or the Bayes factor...
June 8, 2017: Cognitive Psychology
https://www.readbyqxmd.com/read/28600270/an-iterated-greedy-heuristic-for-mixed-no-wait-flowshop-problems
#15
Yamin Wang, Xiaoping Li, Ruben Ruiz, Shaochun Sui
The mixed no-wait flowshop problem with both wait and no-wait constraints has many potential real-life applications. The problem can be regarded as a generalization of the traditional permutation flowshop and the no-wait flowshop. In this paper, we study, for the first time, this scheduling setting with makespan minimization. We first propose a mathematical model and then we design a speed-up makespan calculation procedure. By introducing a varying number of destructed jobs, a modified iterated greedy algorithm is proposed for the considered problem which consists of four components: 1) initialization solution construction; 2) destruction; 3) reconstruction; and 4) local search...
June 5, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28600268/slow-wave-sleep-estimation-for-healthy-subjects-and-osa-patients-using-r-r-intervals
#16
Hee Nam Yoon, Su Hwan Hwang, Jae Won Choi, Yu Jin Lee, Do Un Jeong, Kwang Suk Park
We developed an automatic slow-wave sleep (SWS) detection algorithm that can be applied to groups of healthy subjects and patients with obstructive sleep apnea (OSA). This algorithm detected SWS based on autonomic activations derived from the heart rate variations of a single sensor. An autonomic stability, which is an SWS characteristic, was evaluated and quantified using R-R intervals from an electrocardiogram (ECG). The thresholds and the heuristic rule to determine SWS were designed based on the physiological backgrounds for sleep process and distribution across the night...
June 7, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28599818/dealing-with-uncertainty-when-using-a-surveillance-system
#17
Gaëtan Texier, Liliane Pellegrin, Claire Vignal, Jean-Baptiste Meynard, Xavier Deparis, Hervé Chaudet
INTRODUCTION: Epidemiologists manage outbreak identification and confirmation by means of a "situation diagnosis", which involves validating (or invalidating) an alarm (signal identified as abnormal) as an alert (a real, characterized outbreak) and proposing the first countermeasures. This work investigates how uncertainty is materialized during this stage, and how experts develop strategies to address this uncertainty with the help of an early warning system. METHODS: We built an experiment using a simulation platform with a scenario involving both a natural and an intentional outbreak...
August 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/28599565/multichannel-myopic-deconvolution-in-underwater-acoustic-channels-via-low-rank-recovery
#18
Ning Tian, Sung-Hoon Byun, Karim Sabra, Justin Romberg
This paper presents a technique for solving the multichannel blind deconvolution problem. The authors observe the convolution of a single (unknown) source with K different (unknown) channel responses; from these channel outputs, the authors want to estimate both the source and the channel responses. The authors show how this classical signal processing problem can be viewed as solving a system of bilinear equations, and in turn can be recast as recovering a rank-1 matrix from a set of linear observations. Results of prior studies in the area of low-rank matrix recovery have identified effective convex relaxations for problems of this type and efficient, scalable heuristic solvers that enable these techniques to work with thousands of unknown variables...
May 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28592853/framing-susceptibility-in-a-risky-choice-game-is-altered-by-galvanic-vestibular-stimulation
#19
Nora Preuss, Roger Kalla, Rene Müri, Fred W Mast
Recent research provides evidence that galvanic vestibular stimulation (GVS) has a modulating effect on somatosensory perception and spatial cognition. However, other vestibular stimulation techniques have induced changes in affective control and decision making. The aim of this study was to investigate the effect of GVS on framing susceptibility in a risky-choice game. The participants were to decide between a safe and a risky option. The safe option was framed either positively or negatively. During the task, the participants were exposed to either left anodal/right cathodal GVS, right anodal/left cathodal GVS, or sham stimulation (control condition)...
June 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28590895/a-qualitative-case-study-of-smartphone-connected-hearing-aids-influences-on-patients-clinicians-and-patient-clinician-interactions
#20
Stella L Ng, Shanon Phelan, MaryAnn Leonard, Jason Galster
BACKGROUND: Innovations in hearing aid technology influence clinicians and individuals who use hearing aids. Little research, to date, explains the innovation adoption experiences and perspectives of clinicians and patients, which matter to a field like audiology, wherein technology innovation is constant. By understanding clinician and patient experiences with such innovations, the field of audiology may develop technologies and ways of practicing in a manner more responsive to patients' needs, and attentive to society's influence...
June 2017: Journal of the American Academy of Audiology
keyword
keyword
19173
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"