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https://www.readbyqxmd.com/read/28335480/weighted-kernel-entropy-component-analysis-for-fault-diagnosis-of-rolling-bearings
#1
Hongdi Zhou, Tielin Shi, Guanglan Liao, Jianping Xuan, Jie Duan, Lei Su, Zhenzhi He, Wuxing Lai
This paper presents a supervised feature extraction method called weighted kernel entropy component analysis (WKECA) for fault diagnosis of rolling bearings. The method is developed based on kernel entropy component analysis (KECA) which attempts to preserve the Renyi entropy of the data set after dimension reduction. It makes full use of the labeled information and introduces a weight strategy in the feature extraction. The class-related weights are introduced to denote differences among the samples from different patterns, and genetic algorithm (GA) is implemented to seek out appropriate weights for optimizing the classification results...
March 18, 2017: Sensors
https://www.readbyqxmd.com/read/28335435/spirobifluorene-core-based-novel-hole-transporting-materials-for-red-phosphorescence-oleds
#2
Ramanaskanda Braveenth, Hyeong Woo Bae, Quynh Pham Bao Nguyen, Haye Min Ko, Choong Hun Lee, Hyeong Jun Kim, Jang Hyuk Kwon, Kyu Yun Chai
Two new hole transporting materials, named HTM 1A and HTM 1B, were designed and synthesized in significant yields using the well-known Buchwald Hartwig and Suzuki cross- coupling reactions. Both materials showed higher decomposition temperatures (over 450 °C) at 5% weight reduction and HTM 1B exhibited a higher glass transition temperature of 180 °C. Red phosphorescence-based OLED devices were fabricated to analyze the device performances compared to Spiro-NPB and NPB as reference hole transporting materials...
March 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28335331/the-use-of-spray-dried-mn%C3%A2-o%C3%A2-c-composites-as-electrocatalysts-for-li-o%C3%A2-batteries
#3
Hong-Kai Yang, Chih-Chun Chin, Jenn-Shing Chen
The electrocatalytic activities of Mn₃O₄/C composites are studied in lithium-oxygen (Li-O₂) batteries as cathode catalysts. The Mn₃O₄/C composites are fabricated using ultrasonic spray pyrolysis (USP) with organic surfactants as the carbon sources. The physical and electrochemical performance of the composites is characterized by X-ray diffraction, scanning electron microscopy, particle size analysis, Brunauer-Emmett-Teller (BET) measurements, elemental analysis, galvanostatic charge-discharge methods and rotating ring-disk electrode (RRDE) measurements...
November 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335289/copper-micro-labyrinth-with-graphene-skin-new-transparent-flexible-electrodes-with-ultimate-low-sheet-resistivity-and-superior-stability
#4
Hak Ki Yu
We have developed self-assembled copper (Cu) micro-labyrinth (ML) with graphene skin for transparent flexible electrodes of optoelectronic devices. The Cu ML is simply formed by heating a thin Cu film with a 100-nm thickness on a SiO₂/Si substrate at 950 °C under hydrogen ambient to block the oxidation. Moreover, the Cu ML can have graphene skin at the surface by inserting carbo-hydroxyl molecules (CxHy) during heating due to the catalytic decomposition of C-H bonds on the Cu surface. The Cu ML with graphene skin (Cu ML-G) has superior sheet resistivity below 5 Ω/sq and mechanical flexibility without cracks at the bending radius of 0...
September 1, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334662/the-association-between-personality-disorders-with-alcohol-use-and-misuse-a-population-based-twin-study
#5
E C Long, S H Aggen, M C Neale, G P Knudsen, R F Krueger, S C South, N Czajkowski, R Nesvåg, E Ystrom, F A Torvik, K S Kendler, N A Gillespie, T Reichborn-Kjennerud
BACKGROUND: A clearer understanding of the etiological overlap between DSM-IV personality disorders (PDs) and alcohol use (AU) and alcohol use disorder (AUD) is needed. To our knowledge, no study has modeled the association between all 10 DSM-IV PDs and lifetime AU and AUD. The aim of the present study is to identify which PDs are most strongly associated with the phenotypic, genetic, and environmental risks of lifetime AU and AUD, and to determine if these associations are stable across time...
March 7, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28334391/sediment-anoxia-limits-microbial-driven-seagrass-carbon-remineralization-under-warming-conditions
#6
Stacey M Trevathan-Tackett, Justin R Seymour, Daniel A Nielsen, Peter I Macreadie, Thomas C Jeffries, Jonathan Sanderman, Jeff Baldock, Johanna M Howes, Andrew D L Steven, Peter Ralph
Seagrass ecosystems are significant carbon sinks, and their resident microbial communities ultimately determine the quantity and quality of carbon sequestered. However, environmental perturbations have been predicted to affect microbial-driven seagrass decomposition and subsequent carbon sequestration. Utilizing techniques including 16S-rDNA sequencing, solid-state NMR and microsensor profiling, we tested the hypothesis that elevated seawater temperatures and eutrophication enhance the microbial decomposition of seagrass leaf detritus and rhizome/root tissues...
March 15, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28334318/laboratory-and-field-age-of-aqueous-grape-juice-bait-and-capture-of-zaprionus-indianus-diptera-drosophilidae
#7
Nancy D Epsky, Micah A Gill
Volatile chemicals produced by actively fermenting aqueous grape juice bait have been found to be highly attractive to the African fig fly, Zaprionus indianus Gupta. This is a highly dynamic system and time period of fermentation is an important factor in bait efficacy. A series of field tests were conducted that evaluated effects of laboratory versus field fermentation and sampling period (days after placement [DAP]) on bait effectiveness as the first step in identifying the chemicals responsible for attraction...
March 8, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28333651/automated-ecg-noise-detection-and-classification-system-for-unsupervised-healthcare-monitoring
#8
Udit Satija, Barathram Ramkumar, M Sabarimalai Manikandan
OBJECTIVE: Automatic detection and classification of noises can play a vital role in the development of robust unsupervised electrocardiogram (ECG) analysis systems. This paper proposes a novel unified framework for automatic detection, localization and classification of single and combined ECG noises. METHODS: The proposed framework consists of the modified ensemble empirical mode decomposition (CEEMD), the shortterm temporal feature extraction, and the decision rules based noise detection and classification...
March 22, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28333163/universality-of-schmidt-decomposition-and-particle-identity
#9
Stefania Sciara, Rosario Lo Franco, Giuseppe Compagno
Schmidt decomposition is a widely employed tool of quantum theory which plays a key role for distinguishable particles in scenarios such as entanglement characterization, theory of measurement and state purification. Yet, its formulation for identical particles remains controversial, jeopardizing its application to analyze general many-body quantum systems. Here we prove, using a newly developed approach, a universal Schmidt decomposition which allows faithful quantification of the physical entanglement due to the identity of particles...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28332938/semantic-transparency-affects-morphological-priming%C3%A2-%C3%A2-%C3%A2-eventually
#10
Vera Heyer, Dana Kornishova
Semantic transparency has been in the focus of psycholinguistic research for decades, with the controversy about the time-course of the application of morpho-semantic information during the processing of morphologically complex words not yet resolved. The present study reports two masked priming studies with English -ness and Russian -ost' nominalisations, investigating how semantic transparency modulates native speakers' morphological priming effects at short and long SOAs. In both languages, we found increased morphological priming for nominalisations at the transparent end of the scale (e...
March 23, 2017: Quarterly Journal of Experimental Psychology: QJEP
https://www.readbyqxmd.com/read/28332664/kinetics-of-ozone-decomposition-in-porous-in2o3-monoliths
#11
Danielle Klawinski, Christian Weinberger, Dominik Klaus, Jan-Henrik Smått, Michael Tiemann, Thorsten Wagner
The performance of many chemical gas-phase reactions is strongly influenced by the interaction of reactants with interfaces. Nanoporous materials, which exhibit pore diameters up to 100 nm and high specific surface areas, can be utilized to reduce the amount of cost-intensive materials (e.g. noble metals). However, due to limitations in material transport and reaction kinetics detailed knowledge of the diffusion and the kinetics of a chemical reaction is necessary to improve the performance of chemical processes in industry and research...
March 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28332199/investigating-the-feasibility-of-classifying-breast-microcalcifications-using-photon-counting-spectral-mammography-a-simulation-study
#12
Bahaa Ghammraoui, Stephen J Glick
PURPOSE: A dual-energy material decomposition method using photon-counting spectral mammography was investigated as a non-invasive diagnostic approach to differentiate between Type I calcifications, consisting of calcium oxalate dihydrate or weddellite compounds that are more often associated with benign lesions, and Type II calcifications containing hydroxyapatite that are predominantly associated with malignant tumors. METHODS: The study was carried out by numerical simulation to assess the feasibility of the proposed approach...
March 22, 2017: Medical Physics
https://www.readbyqxmd.com/read/28331885/formulation-of-image-fusion-as-a-constrained-least-squares-optimization-problem
#13
Nicholas Dwork, Eric M Lasry, John M Pauly, Jorge Balbás
Fusing a lower resolution color image with a higher resolution monochrome image is a common practice in medical imaging. By incorporating spatial context and/or improving the signal-to-noise ratio, it provides clinicians with a single frame of the most complete information for diagnosis. In this paper, image fusion is formulated as a convex optimization problem that avoids image decomposition and permits operations at the pixel level. This results in a highly efficient and embarrassingly parallelizable algorithm based on widely available robust and simple numerical methods that realizes the fused image as the global minimizer of the convex optimization problem...
January 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28330382/algorithm-based-motion-magnification-for-video-processing-in-urological-laparoscopy
#14
Fabian Adams, Reto Schoelly, Daniel Schlager, Martin Schoenthaler, Dominik Stefan Schoeb, Konrad Wilhelm, Simon Hein, Ulrich Wetterauer, Arkadiusz Miernik
PURPOSE: Minimally invasive surgery is in constant further development and has replaced many conventional operative procedures. If vascular structure movement could be detected during these procedures, it could reduce the risk of vascular injury and conversion to open surgery. The recently proposed motion-amplifying algorithm Eulerian Video Magnification (EVM) has been shown to substantially enhance minimal object changes in digitally recorded video that is barely perceptible to the human eye...
March 23, 2017: Journal of Endourology
https://www.readbyqxmd.com/read/28330355/fast-divide-and-conquer-algorithm-for-evaluating-polarization-in-classical-force-fields
#15
Dominique Nocito, Gregory J O Beran
Evaluation of the self-consistent polarization energy forms a major computational bottleneck in polarizable force fields. In large systems, the linear polarization equations are typically solved iteratively with techniques based on Jacobi iterations (JI) or preconditioned conjugate gradients (PCG). Two new variants of JI are proposed here that exploit domain decomposition to accelerate the convergence of the induced dipoles. The first, divide-and-conquer JI (DC-JI), is a block Jacobi algorithm which solves the polarization equations within non-overlapping sub-clusters of atoms directly via Cholesky decomposition, and iterates to capture interactions between sub-clusters...
March 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28328223/an-organic-gelatin-free-nanocomposite-fricke-gel-dosimeter
#16
Takuya Maeyama, Nobuhisa Fukunishi, Kenichi L Ishikawa, Kazuaki Fukasaku, Shigekazu Fukuda
We report a nanocomposite Fricke gel (NC-FG) dosimeter prepared using only Fe(2+) and nano-clay in water, without any organic gelling agents. This dosimeter gels due to its thixotropic properties and exhibits linear energy transfer (LET)-independent radiological properties under carbon ion beam irradiation. The radiation sensitivity of this dosimeter was 1.8 [s(-1)kGy(-1)], which is three times higher than that reported previously (0.6 [s(-1)kGy(-1)]) for a similar dosimeter containing gelatin. The Fe(3+) yield was determined to be 0...
March 22, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28328073/surfactant-assisted-stabilization-of-au-colloids-on-solids-for-heterogeneous-catalysis
#17
Wangcheng Zhan, Yuan Shu, Yujie Sheng, Huiyuan Zhu, Yanglong Guo, Li Wang, Yun Guo, Jinshui Zhang, Guanzhong Lu, Sheng Dai
The stabilization of surfactant-assisted synthesized colloidal noble metal nanoparticles (NPs, such as Au NPs) on solids is a promising strategy for preparing supported nanocatalysts for heterogeneous catalysis because of their uniform particle sizes, controllable shapes, and tunable compositions. However, surfactant removal to obtain clean surfaces for catalysis through traditional approaches (such as solvent extraction and thermal decomposition) can easily induce the sintering of NPs, greatly hampering their use in synthesis of novel catalysts...
March 22, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28327972/orthogonal-decomposition-of-left-ventricular-remodelling-in-myocardial-infarction
#18
Xingyu Zhang, Pau Medrano-Gracia, Bharath Ambale-Venkatesh, David A Bluemke, Brett R Cowan, J Paul Finn, Alan H Kadish, Daniel C Lee, Joao A C Lima, Alistair A Young, Avan Suinesiaputra
Background: Left ventricular size and shape is important for quantifying cardiac remodelling in response to cardiovascular disease. Geometric remodelling indices have been shown to have prognostic value in predicting adverse events in the clinical literature, but these often describe interrelated shape changes. We developed a novel method for deriving orthogonal remodelling components directly from any (moderately independent) set of clinical remodelling indices. Results: Six clinical remodelling indices (end-diastolic volume index, sphericity, relative wall thickness, ejection fraction, apical conicity and longitudinal shortening) were evaluated using cardiac magnetic resonance images of 300 patients with myocardial infarction, and 1991 asymptomatic subjects, obtained from the Cardiac Atlas Project...
February 6, 2017: GigaScience
https://www.readbyqxmd.com/read/28327643/anthropogenic-shift-of-planktonic-food-web-structure-in-a-coastal-lagoon-by-freshwater-flow-regulation
#19
Deevesh A Hemraj, A Hossain, Qifeng Ye, Jian G Qin, Sophie C Leterme
Anthropogenic modification of aquatic systems has diverse impacts on food web interactions and ecosystem states. To reverse the adverse effects of modified freshwater flow, adequate management of discharge is required, especially due to higher water requirements and abstractions for human use. Here, we look at the effects of anthropogenically controlled freshwater flow regimes on the planktonic food web of a Ramsar listed coastal lagoon that is under recovery from degradation. Our results show shifts in water quality and plankton community interactions associated to changes in water flow...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327093/continuous-non-invasive-finger-cuff-caretaker%C3%A2-comparable-to-invasive-intra-arterial-pressure-in-patients-undergoing-major-intra-abdominal-surgery
#20
Irwin Gratz, Edward Deal, Francis Spitz, Martin Baruch, I Elaine Allen, Julia E Seaman, Erin Pukenas, Smith Jean
BACKGROUND: Despite increased interest in non-invasive arterial pressure monitoring, the majority of commercially available technologies have failed to satisfy the limits established for the validation of automatic arterial pressure monitoring by the Association for the Advancement of Medical Instrumentation (AAMI). According to the ANSI/AAMI/ISO 81060-2:2013 standards, the group-average accuracy and precision are defined as acceptable if bias is not greater than 5 mmHg and standard deviation is not greater than 8 mmHg...
March 21, 2017: BMC Anesthesiology
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