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An Approach to Reducing Input Parameter Volume for Fault Classifiers

International Journal of Automation and computing 2019年第2期16卷 199-212页

作者： ann Smith Fengshou Gu Andrew D.Ball Centre for Efficiency and Performance Engineering University of Huddersfield

As condition monitoring of systems continues to grow in both complexity and application, an overabundance of data is amassed. Computational capabilities are unable to keep abreast of the subsequent processing requirements. Thus, a means of establishing computable prognostic models to accurately reflect process condition, whilst alleviating computational burdens, is essential. This is achievable by restricting the amount of information input that is redundant to modelling algorithms. In this paper, a variable clustering approach is investigated to reorganise the harmonics of common diagnostic features in rotating machinery into a smaller number of heterogeneous groups that reflect conditions of the machine with minimal information redundancy. Na?ve Bayes classifiers established using a reduced number of highly sensitive input parameters realised superior classification powers over higher dimensional classifiers,demonstrating the effectiveness of the proposed approach. Furthermore, generic parameter capabilities were evidenced through confirmatory factor analysis. Parameters with superior deterministic power were identified alongside complimentary, uncorrelated, ***, variables with little explanatory capacity could be eliminated and lead to further variable reductions. Their information sustainability is also evaluated with Na?ve Bayes classifiers, showing that successive classification rates are sufficiently high when the first few harmonics are used. Further gains were illustrated on compression of chosen envelope harmonic features. A Na?ve Bayes classification model incorporating just two compressed input variables realised an 83.3% success rate, both an increase in classification rate and an immense improvement volume-wise on the former ten parameter model.

关键词： Fault diagnosis classification variable clustering data compression big data

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Respiratory supercomplexes:structure,function and assembly

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Protein & Cell 2013年第8期4卷 582-590页

作者： Rasika Vartak Christina ann-Marie Porras Yidong Bai Department of Cellular and Structural Biology University of Texas Health Science Center at San AntonioSan AntonioTX 78229USA

The mitochondrial respiratory chain consists of 5 enzyme complexes that are responsible for ATP *** paradigm of the electron transport chain as discrete enzymes diffused in the inner mitochondrial membrane has been replaced by the solid state supercomplex model wherein the respiratory complexes associate with each other to form supramolecular *** in these supercomplexes,which have been shown to be functionally active and required for forming stable respiratory complexes,have been associated with many genetic and neurodegenerative disorders demonstrating their biomedical signifi *** this review,we will summarize the functional and structural signifi cance of supercomplexes and provide a comprehensive review of their assembly and the assembly factors currently known to play a role in this process.

关键词： supercomplex mitochondrial respiration

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The Ananthakrishna Model Under Non-synchronous Perturbation

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Acta Mathematicae Applicatae Sinica 2024年第4期40卷 1078-1097页

作者： Yi-wen TAO Sue ann CAMPBELL Jing-li REN School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China Department of Applied Mathematics University of WaterlooWaterloo N2L3G1Canada

The Ananthakrishna model,seeking to explain the Portevin-Le Chatelier effect,is studied with or without non-synchronous *** the unperturbed model,Bogdanov-Takens bifurcation and zeroHopf bifurcation are *** the perturbed model,rich dynamical behaviors are given by researching the Poincarémap,including solutions of different periods,quasi-periodic solutions,chaotic solutions,and ***,an augmented temperature-dependent perturbation amplitude induces a transition from non-serrated to serrated flow on the stress-time ***,on the stress-strain curve,the phenomenon of repeated yielding diminishes with an increase in the value of a temperature-dependent parameter,while it persists with an increase in the value of a temperature-independent *** analysis sheds light on the factors exerting the most significant influence on dislocation density.

关键词： Ananthakrishna model serrations non-synchronous perturbation attractor bifurcation

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Monomer-activated Copolymerization of Ethylene Oxide and Epichlorohydrin: In Situ Kinetics Evidences Tapered Block Copolymer Formation

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Chinese Journal of Polymer Science 2019年第9期37卷 912-918页

作者： ann-Kathrin Danner Daniel Leibig Lea-Marie Vogt Holger Frey Institute of Organic Chemistry Johannes Gutenberg- Universitat Mainz Duesbergweg 10-14 55128 Mainz Germany Graduate School Materials Science in Mainz Staudinger Weg 9 55128 Mainz Germany

The monomer-activated anionic ring-opening copolymerization (AROP) of ethylene oxide (EO) and epichlorohydrin (ECH) using tetraoctylammonium bromide as an initiator and triisobutylaluminum (i-Bu3Al) as an activator was studied. The properties of the copolymers as well as the microstructure have been analyzed in detail via an in situ NMR kinetics study. The statistical copolymers exhibited molecular weights ranging from 2350 g·mol^-1 to 38000 g·mol^-1 (measured by SEC, PEG-standards) and moderate dispersities of 1.27-1.44. The thermal property tests revealed both a glass transition and melting for all copolymers, supporting a block-like nature. Applying in situ NMR kinetic measurements, the reactivity ratios of EO and ECH were determined to be strongly disparate, i.e., rEo = 9.2 and rECH = 0.10. This shows that the simple one-pot statistical anionic copolymerization of EO and ECH via the monomer-activated AROP resulted in the formation of strongly tapered, block-like structures. Furthermore, post-polymerization functionalization of the reactive chloromethyl groups by nucleophilic displacement was investigated for the copolymers. Copolymerization of EO and ECH offers a broad platform for further functionalization and therefore the possibility to prepare a variety of multifunctional PEGs.

关键词： Epichlorohydrin Polymerization Ring-opening Copolymerization Reactivity ratios Epoxide

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Transferring Google Earth observations to GIS-software: example from gully erosion study

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International Journal of Digital Earth 2013年第2期6卷 196-201页

作者： Amaury Frankl ann Zwertvaegher Jean Poesen Jan Nyssen Department of Geography Ghent UniversityGhentBelgium Department of Geology and Soil Science Ghent UniversityGhentBelgium Department of Earth and Environmental Sciences KU LeuvenHeverleeBelgium

High-resolution images availableonGoogle Earth are increasingly beingconsulted in geographic ***,most studies limit themselves to visualizations or on-screen *** Earth allows users to create points,lines,and polygons on-screen,which can be saved as Keyhole Markup Language(KML)***,the use of R statistics freeware is proposed to easilyconvertthese files to the shapefile format[or‘.shp file format’],which can be loaded into Geographic Information System(GIS)software(ESRI ArcGIS 9 in our example).The geospatial data integration in GIS strongly increases the analysis possibilities.

关键词： geographic study geospatial data integration Google Earth

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Cancer prevention and control: alarming challenges in China

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National Science Review 2016年第1期3卷 117-127页

作者： ann M.Bode Zigang Dong Hongyang Wang The Hormel Institute University of Minnesota National Center for Liver Cancer International Cooperation Laboratory on Signal Transduction Eastern Hepatobiliary Surgery Hospital

China is geographically the third largest country in the world and the most populated low-to-middle-income country. Cancer incidence and mortality rates for some cancers in the USA and European countries have steadily decreased over the last decades, whereas the incidence and mortality of certain cancers in China have been increasing at an alarming speed. Rapid industrialization and urbanization in China have been accompanied by incredible changes in lifestyle and environment combined with an aging population. Mortality caused by lung, colorectal and breast cancers has been steadily increasing, whereas cancer mortality from gastric, esophageal and cervical tumors has tended to decrease. Similar to what has occurred in the United States, unhealthy lifestyles in China, including heavy smoking and poor diet combined with pollution, have contributed to increased cancer risk. China is facing many challenges in cancer treatment and prevention for the general population. The major areas that need to be addressed in the control of cancer in China include cancers associated with environmental pollution,tobacco use, occupational carcinogens, infection, excessive alcohol consumption, dietary deficiencies and obesity. In this perspective, we review the problems in each area and suggest ideas for future directions in cancer research and strategies and actions to reduce the incidence of cancer in China.

关键词： cancer incidence environmental pollution tobacco use and control occupational carcinogens infection-caused cancers alcohol dietary deficiencies obesity cancer prevention

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Understanding gaseous reduction in swine manure resulting from nanoparticle treatments under anaerobic storage conditions

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Journal of Environmental Sciences 2019年第8期31卷 179-191页

作者： Niloy Chandra Sarker Md Borhan ann-Marie Fortuna Shafiqur Rahman Agricultural and Biosystems Engineering Department North Dakota State University USDA-ARS Grazinglands Research Laboratory

Manure is an impending source of carbon(C), sulfur(S) and water(H_2 O). Consequently,microbial populations utilize these constituents to produce methane(CH4), carbon dioxide(CO_2), greenhouse gases(GHGs), and hydrogen sulfide(H_2 S). Application of nanoparticles(NPs) to stored manure is an emerging GHG mitigation technique. In this study, two NPs: nano zinc oxide(nZnO) and nano silver(nAg) were tested in swine manure stored under anaerobic conditions to determine their effectiveness in mitigating gaseous emissions and total gas production. The biological sources of gas production, i.e., microbial populations were characterized via Quantitative Polymerase Chain Reaction(qPCR) analysis. Additionally, pH, redox, and VFAs were determined using standard methods. Each treatment of the experiment was replicated three times and NPs were applied at a dose of 3 g/L of manure. Also, headspace gas from all treatment replicates were analyzed for CH_4 and CO_2 gas concentrations using an SRI-8610 Gas Chromatograph and H_2 S concentrations were measured using a Jerome 631 X meter. Nanoparticles tested in this study reduced the cumulative gas volume by 16%–79% compared to the control. Among the NPs tested, only nZnO consistently reduced GHG concentrations by 37%–97%. Reductions in H_2 S concentrations ranged from 87% to97%. Gaseous reductions were likely due to decreases in the activity and numbers of specific gas producing methanogenic archaea and sulfate reducing bacterial(SRB)species.

关键词： Swine manure Nanoparticles Greenhouse gas Methanogen Sulfate reducing bacteria(SRB)

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Effects of substrate surface treatments on hybrid manufacturing of AlSi7Mg using die casting and selective laser melting

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Journal of Materials Science & Technology 2023年第25期156卷 142-156页

作者： Haiyang Fan ann Witvrouw Friedrich Wolf-Monheim Rainer Souschek Shoufeng Yang Department of Mechanical Engineering and Flanders Make KU LeuvenCelestijnenlaan 300Bbox 2420HeverleeB-3001 LeuvenBelgium Ford Research & Advanced Engineering Ford Research and Innovation Center AachenSüsterfeldstraße 20052072 AachenGermany Yantai Research Institute Harbin Engineering University264000 YantaiChina

To balance the manufacturing cost and customizability of automotive parts,a hybrid manufacturing process combining die-casting and selective laser melting(SLM)is proposed:starting with a conventional cast substrate,SLM is utilized to add additional geometric elements on top of *** this hybrid process,the first priority is to prepare a substrate surface suitable for the subsequent SLM addition of the top-on *** this study,the original cast surface of AlSi7Mg was processed by sandblasting,wire electro-discharge machining,and laser remelting,***,additional AlSi7Mg components were built on both the original cast and treated surfaces through *** hybrid builds,these surfaces and resultant interfaces were examined by optical and scanning electron *** indicate that the defect-free metallurgical joint between the cast and additively added parts can be formed on all surfaces except for the one processed by electro-discharge *** observed epitaxial grain growth crossing the interface implies a strong connection between the cast and the SLMed *** these benefits,also mismatches in microstructure,residual stress level and element distribution between the two parts are *** a comprehensive assessment,laser remelting with no additional machining is recommended as the optimal surface treatment preceding SLM fabrication,because of its user-friendly operation,low cost,and high industrial feasibility.

关键词： Hybrid manufacturing Aluminium alloy Surface treatment Laser remelting Interface Automotive

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Genome and metabolic engineering in non-conventional yeasts:Current advances and applications

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Synthetic and Systems Biotechnology 2017年第3期2卷 198-207页

作者： ann-Kathrin Lobs Cory Schwartz Ian Wheeldon Department of Chemical and Environmental Engineering UC RiversideRiversideUSA

Microbial production of chemicals and proteins from biomass-derived andwaste sugar streams is a rapidly growing area of research and *** the model yeast Saccharomyces cerevisiae is an excellent host for the conversion of glucose to ethanol,production of other chemicals from alternative substrates often requires extensive strain *** avoid complex and intensive engineering of ***,other yeasts are often selected as hosts for bioprocessing based on their natural capacity to produce a desired product:for example,the efficient production and secretion of proteins,lipids,and primary metabolites that have value as commodity *** when using yeasts with beneficial native phenotypes,metabolic engineering to increase yield,titer,and production rate is *** non-conventional yeasts Kluyveromyces lactis,***,Scheffersomyces stipitis,Yarrowia lipolytica,Hansenula polymorpha and Pichia pastoris have been developed as eukaryotic hosts because of their desirable phenotypes,including thermotolerance,assimilation of diverse carbon sources,and high protein ***,advanced metabolic engineering in these yeasts has been *** review outlines the challenges of using non-conventional yeasts for strain and pathway engineering,and discusses the developed solutions to these problems and the resulting applications in industrial biotechnology.

关键词： CRISPR-Cas9 Kluyveromyces lactis Kluyveromyces marxianus Scheffersomyces stipitis Yarrowia lipolytica Hansenula polymorpha Pichia pastoris

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A comprehensive review on bitter gourd (Momordica charantia L.) as a gold mine of functional bioactive components for therapeutic foods

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Food Production, Processing and Nutrition 2022年第1期4卷 107-120页

作者： K.S.Gayathry Jenny ann John Faculty of Ocean Science and Technology Kerala(Department of Food Science and Technology)Kerala University of Fisheries and Ocean Studies(KUFOS)Panangad P.O.KochiKerala682506India

Bitter gourd is a tropical wine grown mainly in India, China and South East Asia. The plant is cultivated mainly for its fruit part which is edible. Bitter gourd is unaccepted widely due to its bitter taste. Nevertheless, the fruit is a source of several key nutrients. The plant, as a whole contains, more than 60 phyto-medicines that are active against more than 30 diseases, including cancer and diabetes. Currently, the incorporation of the bioactive compounds isolated from bitter gourd into functional foods and beverages finds a new horizon. Nanoencapsulation and novel green extraction methods can be employed to improve the yield and quality of extracted compounds and their stability while incorporation into food products. The present review is an attempt to throw light to nutritional aspects, various bioactive compounds present and important nutraceutical properties of the bitter gourd plant in detail.

关键词： Bitter gourd Bioactive Nutraceutical Extraction Encapsulation

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