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https://www.readbyqxmd.com/read/28092595/command-filter-based-adaptive-neural-tracking-controller-design-for-uncertain-switched-nonlinear-output-constrained-systems
#1
Ben Niu, Yanjun Liu, Guangdeng Zong, Zhaoyu Han, Jun Fu
In this paper, a new adaptive approximation-based tracking controller design approach is developed for a class of uncertain nonlinear switched lower-triangular systems with an output constraint using neural networks (NNs). By introducing a novel barrier Lyapunov function (BLF), the constrained switched system is first transformed into a new system without any constraint, which means the control objectives of the both systems are equivalent. Then command filter technique is applied to solve the so-called "explosion of complexity" problem in traditional backstepping procedure, and radial basis function NNs are directly employed to model the unknown nonlinear functions...
January 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28092594/adaptive-trajectory-tracking-of-nonholonomic-mobile-robots-using-vision-based-position-and-velocity-estimation
#2
Luyang Li, Yun-Hui Liu, Tianjiao Jiang, Kai Wang, Mu Fang
Despite tremendous efforts made for years, trajectory tracking control (TC) of a nonholonomic mobile robot (NMR) without global positioning system remains an open problem. The major reason is the difficulty to localize the robot by using its onboard sensors only. In this paper, a newly designed adaptive trajectory TC method is proposed for the NMR without its position, orientation, and velocity measurements. The controller is designed on the basis of a novel algorithm to estimate position and velocity of the robot online from visual feedback of an omnidirectional camera...
January 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28092587/learning-domain-invariant-subspace-using-domain-features-and-independence-maximization
#3
Ke Yan, Lu Kou, David Zhang
Domain adaptation algorithms are useful when the distributions of the training and the test data are different. In this paper, we focus on the problem of instrumental variation and time-varying drift in the field of sensors and measurement, which can be viewed as discrete and continuous distributional change in the feature space. We propose maximum independence domain adaptation (MIDA) and semi-supervised MIDA to address this problem. Domain features are first defined to describe the background information of a sample, such as the device label and acquisition time...
January 16, 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28092498/adaptive-fuzzy-output-feedback-control-for-switched-nonlinear-systems-with-unmodeled-dynamics
#4
Shaocheng Tong, Yongming Li
This paper investigates a robust adaptive fuzzy control stabilization problem for a class of uncertain nonlinear systems with arbitrary switching signals that use an observer-based output feedback scheme. The considered switched nonlinear systems possess the unstructured uncertainties, unmodeled dynamics, and without requiring the states being available for measurement. A state observer which is independent of switching signals is designed to solve the problem of unmeasured states. Fuzzy logic systems are used to identify unknown lumped nonlinear functions so that the problem of unstructured uncertainties can be solved...
February 2017: IEEE Transactions on Cybernetics
https://www.readbyqxmd.com/read/28092390/asthma-comparing-the-impact-of-vitamin-d-versus-uvr-on-clinical-and-immune-parameters
#5
Kylie A Morgan, Elizabeth H Mann, Antony R Young, Catherine M Hawrylowicz
The incidence of asthma has increased markedly since the 1960s and is currently estimated to affect more than 300 million individuals worldwide. A number of environmental factors are implicated in asthma pathogenesis, one of which is vitamin D. Vitamin D deficiency is a global health concern and has increased in parallel with asthma incidence. Epidemiological studies report associations between low vitamin D status, assessed as circulating levels of 25-hydroxyvitamin D, with asthma incidence, severity, exacerbations and responses to treatment...
January 16, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28092211/spanish-adaptation-of-the-frommelt-attitude-toward-care-of-the-dying-scale-fatcod-s-in-nursing-undergraduates
#6
Montserrat Edo-Gual, Joaquín Tomás-Sábado, Juana Gómez-Benito, Cristina Monforte-Royo, Amor Aradilla-Herrero
The Frommelt Attitude Toward Care of the Dying Scale (FATCOD) is designed to assess the attitudes of professionals and trainees toward caring for the dying patient and their family members. In this study the main aim is to adapt the FATCOD to a Spanish context (FATCOD-S). In addition, the relations between FATCOD-S, sociodemographic variables, emotional intelligence, and death attitudes have been analyzed. A sample of 669 Spanish nursing students from four Universities responded to a questionnaire. The exploratory factor analysis (EFA) concludes a structure composed of two significant factors...
January 1, 2017: Omega
https://www.readbyqxmd.com/read/28092078/the-dot-probe-task-to-measure-emotional-attention-a-suitable-measure-in-comparative-studies
#7
Rianne van Rooijen, Annemie Ploeger, Mariska E Kret
For social animals, attending to and recognizing the emotional expressions of other individuals is of crucial importance for their survival and likely has a deep evolutionary origin. Gaining insight into how emotional expressions evolved as adaptations over the course of evolution can be achieved by making direct cross-species comparisons. To that extent, experimental paradigms that are suitable for investigating emotional processing across species need to be developed and evaluated. The emotional dot-probe task, which measures attention allocation toward emotional stimuli, has this potential...
January 13, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28091854/effect-of-high-ambient-temperature-on-behavior-of-sheep-under-semi-arid-tropical-environment
#8
Kalyan De, Davendra Kumar, Vijay Kumar Saxena, Palanisamy Thirumurugan, Syed Mohammed Khursheed Naqvi
High environmental temperature is a major constraint in sheep production under semi-arid tropical environment. Behavior is the earliest indicator of animal's adaptation and responses to the environmental alteration. Therefore, the objective of this study was to assess the effects of high ambient temperature on the behavior of sheep under a semi-arid tropical environment. The experiment was conducted for 6 weeks on 16 Malpura cross (Garole × Malpura × Malpura (GMM)) rams. The rams were divided equally into two groups, designated as C and T...
January 13, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28090627/fdg-pet-for-early-response-assessment-in-lymphomas-part-2-diffuse-large-b-cell-lymphoma-use-of-quantitative-pet-evaluation
#9
REVIEW
Bruce D Cheson, Lale Kostakoglu
In Part 1, we reviewed the role of interim positron emission tomography (PET)/CT scans in Hodgkin lymphoma. In advanced Hodgkin lymphoma, interim PET is a useful prognostic tool that can be used to implement risk-adapted therapy with potential benefits for both patients who have negative interim scans and those whose scans are positive. Interim PET/CT has not shown as encouraging results in diffuse large B-cell lymphoma (DLBCL), with the exception of germinal center B-cell DLBCL. Thus, quantitative methods of interpreting interim PET scans have been pursued in an effort to improve their predictive value...
January 15, 2017: Oncology (Williston Park, NY)
https://www.readbyqxmd.com/read/28090605/domain-adaptation-methods-for-improving-lab-to-field-generalization-of-cocaine-detection-using-wearable-ecg
#10
Annamalai Natarajan, Gustavo Angarita, Edward Gaiser, Robert Malison, Deepak Ganesan, Benjamin M Marlin
Mobile health research on illicit drug use detection typically involves a two-stage study design where data to learn detectors is first collected in lab-based trials, followed by a deployment to subjects in a free-living environment to assess detector performance. While recent work has demonstrated the feasibility of wearable sensors for illicit drug use detection in the lab setting, several key problems can limit lab-to-field generalization performance. For example, lab-based data collection often has low ecological validity, the ground-truth event labels collected in the lab may not be available at the same level of temporal granularity in the field, and there can be significant variability between subjects...
September 2016: Proceedings of the ACM International Conference on Ubiquitous Computing
https://www.readbyqxmd.com/read/28090431/a-role-for-3d-printing-in-kidney-on-a-chip-platforms
#11
Ryan D Sochol, Navin R Gupta, Joseph V Bonventre
The advancement of "kidney-on-a-chip" platforms - submillimeter-scale fluidic systems designed to recapitulate renal functions in vitro - directly impacts a wide range of biomedical fields, including drug screening, cell and tissue engineering, toxicity testing, and disease modelling. To fabricate kidney-on-a-chip technologies, researchers have primarily adapted traditional micromachining techniques that are rooted in the integrated circuit industry; hence the term, "chip." A significant challenge, however, is that such methods are inherently monolithic, which limits one's ability to accurately recreate the geometric and architectural complexity of the kidney in vivo...
March 2016: Current Transplantation Reports
https://www.readbyqxmd.com/read/28090239/the-screening-and-ranking-algorithm-for-change-points-detection-in-multiple-samples
#12
Chi Song, Xiaoyi Min, Heping Zhang
The chromosome copy number variation (CNV) is the deviation of genomic regions from their normal copy number states, which may associate with many human diseases. Current genetic studies usually collect hundreds to thousands of samples to study the association between CNV and diseases. CNVs can be called by detecting the change-points in mean for sequences of array-based intensity measurements. Although multiple samples are of interest, the majority of the available CNV calling methods are single sample based...
December 2016: Annals of Applied Statistics
https://www.readbyqxmd.com/read/28089763/comparison-of-multi-arm-multi-stage-design-and-adaptive-randomization-in-platform-clinical-trials
#13
REVIEW
Jianchang Lin, Veronica Bunn
Platforms trials are clinical trials that allow for concurrent evaluations of multiple treatments, thus allowing for more efficient and ethical studies compared to traditional two-arm trials. Conventional group-sequential multi-arm multi-stage (MAMS) designs use pre-specified stopping boundaries and treatment selection rules to determine if experimental treatments should be dropped. Flexible MAMS designs allow for interim modifications to the design plan without compromising error rates. Bayesian response adaptive randomization (BRAR) designs increase patient allocation to treatment arms that are performing well during the course of the trial...
January 12, 2017: Contemporary Clinical Trials
https://www.readbyqxmd.com/read/28089762/long-terms-results-of-a-trial-of-concurrent-chemotherapy-and-escalating-doses-of-radiation-for-unresectable-non-small-cell-lung-cancer-ncctg-n0028-alliance
#14
Steven E Schild, Shauna L Hillman, Angelina D Tan, Helen J Ross, William L McGinnis, Yolanda A Garces, David L Graham, Alex A Adjei, James R Jett
INTRODUCTION OR HYPOTHESIS: This phase I/II trial was originally designed to determine the maximally tolerated dose(MTD) of thoracic radiotherapy(TRT) as part of a combined modality approach. This report includes the long-term outcome of patients treated on this study. The phase II portion was never completed as RTOG-0617 opened before it was concluded. METHODS: The MTD was defined as 74Gy in 37 fractions in this study. Twenty-five patients with unresectable non-small cell lung cancer(NSCLC) were treated with 2Gy daily fractions and concurrent weekly carboplatin and paclitaxel...
January 12, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28089759/using-pupil-size-and-heart-rate-to-infer-affective-states-during-behavioral-neurophysiology-and-neuropsychology-experiments
#15
Andrew R Mitz, Ravi V Chacko, Philip T Putnam, Peter H Rudebeck, Elisabeth A Murray
BACKGROUND: Nonhuman primates (NHPs) are a valuable research model because of their behavioral, physiological and neuroanatomical similarities to humans. In the absence of language, autonomic activity can provide crucial information about cognitive and affective states during single-unit recording, inactivation and lesion studies. Methods standardized for use in humans are not easily adapted to NHPs and detailed guidance has been lacking. NEW METHOD: We provide guidance for monitoring heart rate and pupil size in the behavioral neurophysiology setting by addressing the methodological issues, pitfalls and solutions for NHP studies...
January 12, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28089331/evaluation-of-marginal-and-internal-adaptation-of-hybrid-and-nanoceramic-systems-with-microcomputed-tomography-an-in%C3%A2-vitro-study
#16
Güler Yildirim, Ismail H Uzun, Ali Keles
STATEMENT OF PROBLEM: The accuracy of recently introduced chairside computer-aided design and computer-aided manufacturing (CAD-CAM) blocks is not well established, and marginal integrity and internal adaptation are not known. PURPOSE: The purpose of this in vitro study was to evaluate the marginal and internal adaptation of hybrid and nanoceramics using microcomputed tomography (μ-CT). MATERIAL AND METHODS: The marginal and internal adaptation of 3 polymer-infiltrated ceramic-network (PICN) materials (Vita Enamic [VE]; Lava Ultimate [LU]; Vita Suprinity [VS]) were compared with lithium disilicate (IPS e...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089330/finite-element-analysis-of-implant-assisted-removable-partial-dentures-framework-design-considerations
#17
Reza Shahmiri, Raj Das
STATEMENT OF PROBLEM: Connecting an acrylic resin base to both a metal framework and a rigidly fixed implant may affect the rotational displacement of the prosthesis during loading. PURPOSE: The purpose of this finite element analysis study was to analyze the effect of connecting a denture base metal framework to an implant with the aim of decreasing the rotational movement of an implant-assisted removable partial denture. MATERIAL AND METHODS: A mesial occlusal rest direct retainer and a distal occlusal rest direct retainer were modeled and adapted to incorporate a modified denture base metal framework in the connection area for each model...
January 12, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28089249/redundant-and-fault-tolerant-algorithms-for-real-time-measurement-and-control-systems-for-weapon-equipment
#18
Dan Li, Xiaoguang Hu
Because of the high availability requirements from weapon equipment, an in-depth study has been conducted on the real-time fault-tolerance of the widely applied Compact PCI (CPCI) bus measurement and control system. A redundancy design method that uses heartbeat detection to connect the primary and alternate devices has been developed. To address the low successful execution rate and relatively large waste of time slices in the primary version of the task software, an improved algorithm for real-time fault-tolerant scheduling is proposed based on the Basic Checking available time Elimination idle time (BCE) algorithm, applying a single-neuron self-adaptive proportion sum differential (PSD) controller...
January 12, 2017: ISA Transactions
https://www.readbyqxmd.com/read/28089136/recent-insights-into-biohydrogen-production-by-microalgae-from-biophotolysis-to-dark-fermentation
#19
REVIEW
Dillirani Nagarajan, Duu-Jong Lee, Akihiko Kondo, Jo-Shu Chang
One of the best options to alleviate the problems associated with global warming and climate change is to reduce burning of fossil fuels and search for new alternative energy resources. In case of biodiesel and bioethanol production, the choice of feedstock and the process design influences the GHG emissions and appropriate methods need to be adapted. Hydrogen is a zero-carbon and energy dense alternative energy carrier with clean burning properties and biohydrogen production by microalgae can reduce production associated GHG emissions to a great extent...
December 30, 2016: Bioresource Technology
https://www.readbyqxmd.com/read/28088423/effects-of-rumen-protected-capsicum-oleoresin-on-productivity-and-responses-to-a-glucose-tolerance-test-in-lactating-dairy-cows
#20
J Oh, M Harper, F Giallongo, D M Bravo, E H Wall, A N Hristov
The objective of this experiment was to investigate the effects of rumen-protected Capsicum oleoresin (RPC) supplementation on feed intake, milk yield and composition, nutrient utilization, fecal microbial ecology, and responses to a glucose tolerance test in lactating dairy cows. Nine multiparous Holstein cows were used in a replicated 3 × 3 Latin square design balanced for residual effects with three 28-d periods. Each period consisted of 14 d for adaptation and 14 d for data collection and sampling. Treatments were 0 (control), 100, and 200 mg RPC/cow per day...
January 11, 2017: Journal of Dairy Science
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