Готові списки джерел за темами / Quality coefficients

Добірка наукової літератури з теми "Quality coefficients"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Quality coefficients"

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Keller, Arturo A., Xiaoli Chen, Jessica Fox, Matt Fulda, Rebecca Dorsey, Briana Seapy, Julia Glenday, and Erin Bray. "Attenuation Coefficients for Water Quality Trading." Environmental Science & Technology 48, no. 12 (June 4, 2014): 6788–94. http://dx.doi.org/10.1021/es500202x.

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2

Mirskikh, G., V. Vasyuk та T. Knizhka. "Комбіновані методи визначення вагових коефіцієнтів в задачах оцінювання якості енергетичних об`єктів". Energy and automation, № 3(49) (11 червня 2020): 78–88. http://dx.doi.org/10.31548/energiya2020.03.078.

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When designing power facilities, the problem usually arises of comparing their possible options for performance, taking into account consumer quality. A common and easy-to-implement method is the formation of a generalized indicator, however, subjectivity is inherent in it, given this, the task of developing algorithms and methods that objectively consider the quality indicators of an energy object becomes especially urgent. It is argued that, in accordance with the condition for making a decision on the type of the synthesizing function, the main object of uncertainty, respectively, of the quality indicator, which is inherently subjective, is the vector of the significance coefficients of the weight coefficients. The presented algorithms in conditions of uncertainty that allow you to build a generalized quality criterion for energy facilities. For a comprehensive assessment of the quality of energy facilities, it is proposed to use the methods of arbitrary summary indicators, namely: the method of arbitrary summary indicators, the method of priority of private quality indicators and the method of minimizing the deviation of the summary quality indicator. It is proposed to reduce the influence of subjective factors in determining the weight coefficients, it is advisable to use a combination of these methods. For the method of minimizing the deviation of the aggregate indicator, using the principle of objectivity, an algorithm for determining the weight coefficients has been developed, taking into account that in the area of permissible changes in parameters, the value of the criterion will be minimal. Accordingly, to solve the problem of comparing the options for constructing energy facilities, which includes the determination of weight coefficients for the formation of a composite indicator, it is necessary to use the results of expert assessment that are supplemented by calculation methods that will reduce the subjective factor that is inherent in the method of expert assessment.
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3

Gupta, Praful, Christos Bampis, Jack Glover, Nicholas Paulter, and Alan Bovik. "Multivariate Statistical Approach to Image Quality Tasks." Journal of Imaging 4, no. 10 (October 12, 2018): 117. http://dx.doi.org/10.3390/jimaging4100117.

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Many existing natural scene statistics-based no reference image quality assessment (NR IQA) algorithms employ univariate parametric distributions to capture the statistical inconsistencies of bandpass distorted image coefficients. Here, we propose a multivariate model of natural image coefficients expressed in the bandpass spatial domain that has the potential to capture higher order correlations that may be induced by the presence of distortions. We analyze how the parameters of the multivariate model are affected by different distortion types, and we show their ability to capture distortion-sensitive image quality information. We also demonstrate the violation of Gaussianity assumptions that occur when locally estimating the energies of distorted image coefficients. Thus, we propose a generalized Gaussian-based local contrast estimator as a way to implement non-linear local gain control, which facilitates the accurate modeling of both pristine and distorted images. We integrate the novel approach of generalized contrast normalization with multivariate modeling of bandpass image coefficients into a holistic NR IQA model, which we refer to as multivariate generalized contrast normalization (MVGCN). We demonstrate the improved performance of MVGCN on quality-relevant tasks on multiple imaging modalities, including visible light image quality prediction and task success prediction on distorted X-ray images.
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4

Hron, J., and T. Macák. "Control of food products’ quality." Agricultural Economics (Zemědělská ekonomika) 55, No. 5 (June 1, 2009): 221–28. http://dx.doi.org/10.17221/28/2009-agricecon.

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The paper deals with one of the significant parts of the concept related to controlling production quality, which is the analysis of production quality stability done for the following production procedure regulation aimed at the food manufacturing industry. The proposed methodology (respecting the change of location and variability of the food quality characteristics) will be introduced on the milk quality regulation. Also, there is the frequent problem solved out here in the report that relates to food quality measuring – their self-regulation by using the statistical calculation of self-regulation higher classes’ coefficients and also using the functional statement taken from the differential description.
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5

Vlkovský, Martin, and Petr Veselík. "Cargo Securing – Comparison of Different Quality Roads." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 67, no. 4 (2019): 1015–23. http://dx.doi.org/10.11118/actaun201967041015.

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The article deals with the subject of the impact which road surfaces have onto cargo and the securing of cargo against shocks during road transport. The applicability of the key EN 12191‑1:2010 standard is discussed, not only for common conditions, but also for specific transport conditions on low‑quality road surfaces. Part of the article involves carrying out a transport experiment on a road paved with granite blocks and on a highway, from which data on the impact of shocks on cargo (acceleration coefficients values) were obtained. The data were statistically evaluated and compared to the normatively determined values of these acceleration coefficients. A parametric statistical analysis (two‑sample t‑test) was used to compare the values of the acceleration coefficients from the two types of surfaces. The analysis conducted shows statistically significant differences between the data measured on the road paved with granite blocks and on the highway. Using correlation analysis, the dependence of the acceleration coefficient values and inertial forces affecting cargo during transport were verified. For the relevant axes (x – longitudinal and y – transverse), a very strong correlation was found.
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6

Aamlid, T. S., J. W. Knox, H. Riley, A. Kvalbein, and T. Pettersen. "Crop Coefficients, Growth Rates and Quality of Cool-Season Turfgrasses." Journal of Agronomy and Crop Science 202, no. 1 (April 10, 2015): 69–80. http://dx.doi.org/10.1111/jac.12130.

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7

Safiullin, Lenar, Nail Safiullin, and Gulnara N. Ismagilova. "Generalized coefficients of goods quality and satisfying of consumers demand." Applied Studies in Agribusiness and Commerce 4, no. 3-4 (October 30, 2010): 83–86. http://dx.doi.org/10.19041/apstract/2010/3-4/14.

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In process of work the problems are set and solved. There are problems of social welfare research in conditions of nonhomogeneity of objects and subjects of management, of revealing and substantiating insuperable difficulties in rising of social welfare by approaches, worked out before. Also there developed a new direction in implementation of the most important aim of any socially-oriented economy.
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8

Pirozzi, F., D. Pianese, and G. d'Antonio. "Water quality decay modelling in hydraulic pressure systems." Water Supply 2, no. 4 (September 1, 2002): 111–18. http://dx.doi.org/10.2166/ws.2002.0128.

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Анотація:
A mathematical model able to evaluate water quality variations in complex hydraulic pressure systems has been developed. The model consists of a set of mass balance equations for tanks, pipes and nodes. It has been applied to predict chlorine concentration inside a case-study water network described in literature by using different expressions of chlorine decay coefficients, obtained in laboratory tests and expressed as a function of the residence time of water in pipes, the initial chlorine concentration, the history and temperature of water. The results showed little variations of the chlorine concentrations and the need to calibrate the parameters of chlorine decay coefficients expressions on full scale hydraulic systems.
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9

Lenz, Richard L. "Why noise reduction coefficients aren’t enough." Journal of the Acoustical Society of America 151, no. 4 (April 2022): A172. http://dx.doi.org/10.1121/10.0011009.

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Анотація:
Noise reduction coefficients have been around for decades. The use, and misuse, of the data supplied by these tests has been well-documented over that time. The desire by some to bring changes to standards like ASTM C423 and ISO 354 have been met with tremendous resistance by both manufacturers, laboratories and others over the years. This paper will discuss the use of these standards, what they tell us about sound and where they fall short in the assessment of the quality and assessment of sound absorption. Discussion of inappropriate use of standards in testing materials will also be presented. A discussion on the subject of timbre and how different materials may sound different while having similar NRC ratings will also be presented. The need for different test data and higher standards in the industry of acoustics will also be discussed. A presentation of the use of a free-field test method for assessing the quantity and quality of absorption will be presented along with test data from this method.
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10

KHOSHGOFTAAR, TAGHI M., and EDWARD B. ALLEN. "LOGISTIC REGRESSION MODELING OF SOFTWARE QUALITY." International Journal of Reliability, Quality and Safety Engineering 06, no. 04 (December 1999): 303–17. http://dx.doi.org/10.1142/s0218539399000292.

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Анотація:
Reliable software is mandatory for complex mission-critical systems. Classifying modules as fault-prone, or not, is a valuable technique for guiding development processes, so that resources can be focused on those parts of a system that are most likely to have faults. Logistic regression offers advantages over other classification modeling techniques, such as interpretable coefficients. There are few prior applications of logistic regression to software quality models in the literature, and none that we know of account for prior probabilities and costs of misclassification. A contribution of this paper is the application of prior probabilities and costs of misclassification to a logistic regression-based classification rule for a software quality model. This paper also contributes an integrated method for using logistic regression in software quality modeling, including examples of how to interpret coefficients, how to use prior probabilities, and how to use costs of misclassifications. A case study of a major subsystem of a military, real-time system illustrates the techniques.
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Більше джерел

Дисертації з теми "Quality coefficients"

1

Bonnyman, J. I. "A neural network mapping of L.P.C. coefficients for quality speech synthesis." Thesis, University of Nottingham, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282690.

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2

Srivastava, Saurabh. "Crop coefficients and water quality for watermelon and bell pepper under drip and seepage irrigation." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0010468.

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3

Larsson, Alm Kevin. "Automatic Speech Quality Assessment in Unified Communication : A Case Study." Thesis, Linköpings universitet, Programvara och system, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-159794.

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Анотація:
Speech as a medium for communication has always been important in its ability to convey our ideas, personality and emotions. It is therefore not strange that Quality of Experience (QoE) becomes central to any business relying on voice communication. Using Unified Communication (UC) systems, users can communicate with each other in several ways using many different devices, making QoE an important aspect for such systems. For this thesis, automatic methods for assessing speech quality of the voice calls in Briteback’s UC application is studied, including a comparison of the researched methods. Three methods all using a Gaussian Mixture Model (GMM) as a regressor, paired with extraction of Human Factor Cepstral Coefficients (HFCC), Gammatone Frequency Cepstral Coefficients (GFCC) and Modified Mel Frequency Cepstrum Coefficients (MMFCC) features respectively is studied. The method based on HFCC feature extraction shows better performance in general compared to the two other methods, but all methods show comparatively low performance compared to literature. This most likely stems from implementation errors, showing the difference between theory and practice in the literature, together with the lack of reference implementations. Further work with practical aspects in mind, such as reference implementations or verification tools can make the field more popular and increase its use in the real world.
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4

Andrade, Caroline Piffer de. "Remote sensing of chlorophyll-a concentration based on absorption coefficients in Ibitinga reservoir." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153807.

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Анотація:
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
O presente estudo objetivou estimar as concentrações de clorofila-a (Chl-a) no reservatório da usina hidroelétrica de Ibitinga (RHI), localizado no Rio Tietê, estado de São Paulo, Brasil, por meio de coeficientes de absorção obtidos via algoritmos quase-analíticos (QAAs). Para isso, realizou-se uma caracterização bio-ótica e biogeoquímica do RHI, por meio de dados espectrais e de qualidade da água coletados em dois trabalhos de campo, conduzidos em Julho de 2016 e Junho de 2017. Os desempenhos das versões originais QAAV5 e QAAV6 em estimar as propriedades óticas inerentes (POIs) no RHI foram avaliados. Versões re-parametrizadas para dois reservatórios localizados no sistema em cascata do Rio Tietê, QAABBHR e QAAOMW, foram também testadas para a área de estudo. Além disso, foram avaliadas as performances de esquemas compostos pelas versões do QAA já mencionadas, seguidas por quatro modelos para estimativa de Chl-a, os quais utilizam coeficientes de absorção como dados de entrada. A distribuição espacial das concentrações de Chl-a foi analisada por meio da aplicação desses esquemas em uma imagem do sensor Ocean and Land Colour Instrument (OLCI) instalado a bordo do satélite Sentinel-3A, com aquisição coincidente com o segundo trabalho de campo realizado na área de estudo. A caracterização bio-ótica demonstrou variabilidade espacial e temporal dos constituintes oticamente significativos (COSs) no RHI, com predominância da absorção pelo material orgânico colorido dissolvido (CDOM). As versões do QAA testadas para o primeiro conjunto de dados não se mostraram completamente adequadas na obtenção de coeficientes de absorção em todos os comprimentos de onda. Com relação aos esquemas para estimativa de concentração de Chl-a, apenas aqueles baseados no QAAV5 foram capazes de obter resultados razoáveis - Raiz do Erro Médio Quadrático Normalizado (REMQN) < 47.50 % - para os dados da imagem OLCI. Todos os quatro modelos para estimativa de Chl-a testados apresentaram resultados similares para os dados de saída do QAAV5. Esses resultados enfatizam o desafio gerado pela grande variabilidade ótica dos sistemas em cascata, com relação à modelagem bio-óptica. Os resultados obtidos dão suporte a futuros trabalhos, os quais podem resultar em aplicações como o monitoramento do estado trófico na área de estudo a partir de dados de satélite, com maior acurácia proveniente do uso de modelos que possam estimar consistentemente suas POIs.
This research was aimed at retrieving chlorophyll-a (Chl-a) concentrations in Ibitinga Hydroelectric Reservoir (IHR), located at Tietê River, São Paulo State, Brazil, using absorption coefficients obtained via Quasi-analytical algorithms (QAAs). For this purpose, a bio-optical and bio-geochemical characterization of IHR was carried out, through spectral and water quality data collected in two field campaigns conducted in July, 2016 and June, 2017. The suitability of two QAA native forms (QAAV5 and QAAV6) in retrieving inherent optical properties (IOPs) in IHR was assessed. Versions re-parameterized for two reservoirs also located in the Tietê River cascading system, QAABBHR and QAAOMW, were also tested for the study area. Besides that, the performances of schemes composed by the QAA versions already mentioned followed by four models that use absorption coefficients as inputs for estimating Chl-a concentration in Ibitinga Reservoir were evaluated. Spatial distribution of Chl-a in the reservoir was analyzed, since these schemes were applied in an image of the Ocean and Land Colour Instrument (OLCI) sensor onboard Sentinel-3A satellite, with acquisition date coincident with the second field campaign. The bio-optical characterization showed spatial and temporal variability of optically significant constituent (OSC) in IHR and colored dissolved organic matter (CDOM) predominance in its absorption budget. None of the QAA versions tested for the first dataset was completely satisfactory in retrieving absorption coefficients for IHR in all wavelengths. Regarding the schemes for Chl-a concentration estimates, only the ones based on QAAV5 were able to obtain reasonable results - Normalized Root Mean Square Error (nRMSE) < 47.50 % - for the OLCI image data. All four models for Chl-a estimation tested presented similar results for QAAV5 outputs. These results highlight the challenge of copying with high optical variability in cascading systems. The results obtained support further works, which can, prospectively, lead to many practical applications, as monitoring of trophic state in the study area from satellite data, with higher accuracy provided by the use of models that can consistently retrieve the IOPs for this specific water system.
FAPESP: 2012/19821-1 e 2015/21586-9
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5

Gallina, Rubens. "Caractérisation du matériau quartz en vue de la réalisation des résonateurs : traitement permettant d'améliorer sa qualité." Besançon, 1995. http://www.theses.fr/1995BESA2027.

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Анотація:
Notre premier but est de rechercher les moyens de caractériser le quartz naturel en vue de sa sélection pour des applications piézoélectriques. Une sélection objective impose de recourir à des mesures de quantités qui soient en relation avec la qualité attendue du matériau et qui puissent constituer un bon indicateur. Après un bref rappel sur la structure du quartz, les conventions utilisées pour décrire ses propriétés et les différentes classifications définies. Nous faisons une synthèse des différents défauts et des impuretés que l'on rencontre dans le quartz. Nous examinons ensuite l'ensemble des coefficients, linéaires et non linéaires, qui permettent de décrire ses propriétés et à partir des données existantes nous proposons un choix pour ceux qui peuvent servir d'indicateur de la qualité du matériau. Nous décrivons un ensemble de mesure simple dérivé de celui de Lamb et Richter, permettant la mesure de l'atténuation des ondes élastiques dans le quartz. Et avec lequel nous avons réalisé la mesure de certains coefficients viscoélastiques. La seconde partie est consacrée à l'étude de la réduction de la densité des "canaux d'attaque chimique" du quartz. La formation de ceux-ci est liée aux dislocations et aux impuretés. Nous nous sommes intéressé essentiellement au traitement par recuit des ébauches de résonateurs, avec éventuellement application d'un champ électrique (traitement par électrodiffusion). Nous en avons conclu que la température seule jouait un rôle primordial
Our first aim is to investigate the means to characterize the natural quartz for a selection to piezoelectric applications. After a short overview of quartz lattice, the conventions used to describe quartz properties and his different classifications, we make a brief review of different defects and impurities which we find in quartz crystals. We examine the set of the coefficients, linear and nonlinear, which can describe the properties of the quartz and for which datas are available. We propose to choose the coefficients that can be used as indicators of the material quality. We describe an experimental arrangement derived from that of Lamb and Richter, which with we can measure the elastic waves attenuation in the quartz. We realised the measurements of some viscoelastic coefficients. The second part of this memory is devoted to the study of density reduction of etch-channels in quartz. The formation of etch-channels is linked to dislocations and impurities. We are interested essentialy in the treatement of the resonators by heating, with eventualy electric field application (electrodiffusion treatemerit). We found that the temperature is the main parameter
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6

Le, Floch Jean-Michel. "Modélisation de nouveaux résonateurs diélectriques à fort coefficient de qualité pour des applications de métrologie." Limoges, 2007. https://aurore.unilim.fr/theses/nxfile/default/dce4dfe5-e130-4125-a6e3-283544f6daa0/blobholder:0/2007LIMO4059.pdf.

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Анотація:
Ces travaux de recherche s’inscrivent dans le cadre de l’utilisation des résonateurs diélectriques à fort coefficient de qualité pour des applications de test de physique fondamentale et de métrologie. Les progrès technologiques récents dans la fabrication de nouveaux matériaux diélectriques ont permis l’utilisation de résonateurs diélectriques dans de nouvelles applications. Ainsi, un nouvel outil de simulation électromagnétique, utilisant la méthode des lignes, est décrit dans le premier chapitre, afin de caractériser ces structures résonantes. Dans les chapitres 3 et 4, deux applications de résonateurs diélectriques à effet Bragg dans deux topologies différentes sont présentées. Dans un cinquième chapitre, un logiciel en C++ pour l’acquisition automatique des données par port GPIB est présenté. Le sixième chapitre est consacré au résonateur diélectrique sphérique à mode de galerie pour une application de filtrage et de test de physique fondamentale. Le septième et dernier chapitre est dédié à la mesure de la stabilité d’un oscillateur bi-mode à température ambiante
These research works have been done in order to use high-Q dielectric resonators for tests of fundamental Physics and metrology applications. Recent technical improvements in the manufacturing of new dielectric materials allowed them to be introduced into new applications. Thus, a new electromagnetic simulation tool, using the Method of Lines, is described in the first chapter in order to characterize resonant structures. In the chapters 3 and 4, two applications of dielectric resonators using Bragg effect in two different topologies has been presented. In a fifth chapter, a program in C++ for automatic data acquisition by GPIB has been presented. The sixth chapter is devoted to a spherical dielectric resonator using whispering galerie mode to be used as a filter and to participate for a Michelson-Morley experiment (Test of Fundamental Physics). The seventh chapter is dedicated to a stability measurement of a dual mode oscillator at room temperature
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7

Si-Ahmed, Chérif. "Contribution à l'étude du coefficient de qualité dans une chambre réverbérante à brassage de modes." Lille 1, 2001. https://pepite-depot.univ-lille.fr/RESTREINT/Th_Num/2001/50376-2001-5.pdf.

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8

Edmonds, Jennifer Echols. "An Investigation of the Effectiveness of the Division of Corporate Finance as a Monitor of Financial Reporting." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/40437.

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Анотація:
This study uses the Securities and Exchange Commissionâ s (SEC) comment letters to investigate the SECâ s role as a monitor of financial reporting. I examine whether the SEC effectively comments on firms with poor disclosure quality. I utilize forward earnings response coefficients (FERC) as a measure of the marketâ s perception of disclosure quality. I expect comment letter firms to have lower disclosure quality and thus lower FERCs. Secondly, within the firms selected for comment, I investigate whether the Division allocates a greater amount of resources towards firms with more severe disclosure deficiencies. Results indicate that comment letter recipients have significantly lower forward earnings response coefficients than non- recipients. Results also document that comment letter recipients have lower contemporaneous earnings response coefficients than non-recipients. These findings are consistent with the DCF being effective in selecting firms that are perceived by the market as having low disclosure and earnings quality. However, within comment letter firms, I am unable to provide any evidence that the DCF allocates more resources to firms with lower forward earnings response coefficients.
Ph. D.
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9

Amdouni, Asma. "Surveillance statistique du coefficient de variation dans un contexte de petites séries." Nantes, 2015. http://archive.bu.univ-nantes.fr/pollux/show.action?id=dcf36868-32b2-41d6-916b-f9533ee12902.

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Анотація:
La maîtrise statistique des procédés (MSP) est une méthode de contrôle de la qualité basée sur les statistiques. La surveillance du coefficient de variation est une approche efficace à la MSP lorsque la moyenne du processus µ et son écart type σ ne sont pas constants mais leur rapport est constant. Jusqu’à présent, les études portant sur la surveillance du coefficient de variation se sont limitées au cas d’une production avec un horizon infini. Cette thèse présente de nouvelles cartes de contrôle pour surveiller le coefficient de variation dans le contexte fini lorsque les paramètres sont connus : des cartes de contrôle séparées de type Shewhart, des cartes avec des règles supplémentaires et des cartes VSI et VSS. Les paramètres optimaux ont été systématiquement calculés et les performances de chacune de ces cartes ont été également évaluées en développant de nouvelles mesures statistique de performance appropriées dans un contexte de production à horizon fini. Une validation empirique des résultats a été élaborée pour des procédés industriels existants
Statistical Process Control (SPC) is a method of quality control based on statistics and used to monitor production. Monitoring the coefficient of variation is an effective approach to SPC when the process mean µ and standard deviation σ are not constant but their ratio is constant. Until now, research has not investigated the monitoring of the coefficient of variation for short production runs. Viewed under this perspective, in this thesis, we will propose new methods to monitor the coefficient of variation for a finite horizon production, we will investigate the properties (in terms of the Truncated Run Length) of some control charts for the coefficient of variation in a Short Run context in the case of known parameters, such as the one-sided Shewhart Chart, the Run Rules Chart, the VSI and VSS Charts. The performance of each control chart has been evaluated by developing statistical measures of performance appropriate in a Short Run context and the optimal parameters were systematically computed. An empirical validation of the results has been developed for real industrial processes
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10

Соболевський, Руслан Вадимович. "Управління якістю нерудних будівельних матеріалів на основі геостатистичного моделювання". Thesis, КПІ ім. Ігоря Сікорського, 2017. https://ela.kpi.ua/handle/123456789/19111.

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Дисертація присвячена вирішенню актуальної науково-практичної проблеми управління якістю нерудних будівельних матеріалів на основі геостатистичного моделювання для обґрунтування оптимальних технологічних рішень, яке полягає у встановленні залежностей природних та технологічних параметрів, які оцінюються інтегральними показниками якості реалізованими при геостатистичному моделюванні ефективності технологічних рішень. Доведено, що при селективному способі розробки родовищ нерудної будівельної сировини управління якістю необхідно здійснювати з врахуванням фрактальної природи показників якості, які визначаються за розробленими методиками. Вперше встановлені залежності між кількістю тріщин та азимутом простягання, між орієнтацією окремих систем тріщин, виділених за результатами кластерного аналізу, і оптимальним напрямком відколу для родовищ декоративного каменю, що може бути використано для прогнозування напрямку розвитку гірничих робіт та управління процесами видобування декоративного каменю. Встановлено, що ефективність процесу управління технологічними процесами при розробці декоративного каменю досягається за результатами оцінки геопросторової мінливості узагальнюючого показника фрактальної розмірності, який є функцією орієнтації тріщинуватості, лінійних розмірів тріщин та швидкості буріння тріщинуватого масиву. Вперше виділені групи родовищ нерудних будівельних матеріалів за геоструктурними показниками та фрактальною розмірністю роз тріщинуватості. Встановлено взаємозв’язок між геохімічними та геоструктурними показниками якості родовищ нерудних будівельних матеріалів та оцінено вплив їх просторової мінливості на ефективність селективного видобування нерудних будівельних матеріалів.
The dissertation is devoted to solving the actual scientific and practical problem of quality management of nonmetallic building materials based on geostatistical modeling for grounding the optimal technological solutions that become apparent at the ascertainment of natural and technological parameters relationships which are assessed by integral quality coefficients realized at geostatistical modeling of the effectiveness of technological solutions. It is proved that when using the selective method of mining of non-metallic building materials, the quality management should be carried out taking into account the fractal nature of quality coefficients, which are determined by the developed methods. The relationship between the number of fractures and strike azimuth for ornamental stone deposits is first established, that can be used to predict the direction of mining development and management of ornamental stone extraction processes. As a result of the performed research into regularities of formation of fracturing of deposits of labradorite, we identified the main types of the samples describing the elements of occurrence, and formed the reference samples, the analysis of which allowed us to substantiate the optimal methods of cluster analysis for selecting the systems of fracturing. To predict the direction of development of mining and management of the processes of extraction of decorative stone, we obtained analytical expression of dependency of the quantity of cracks on the strike azimuth in the form of polynomial of the second degree. The relationship between the orientation of individual systems of fractures allocated according to the results of cluster analysis and optimal cleavage direction for gabbro rocks deposits is first established, that allow to develop the optimal method of the mining operations planning, taking into account the anisotropy of ornamental stone deposits properties. It is proved that for quality management and assessment of the prospects of deposits or block stone individual sections development, it is advisable to carry out the evaluation according to the number of fractures in the system that are selected by the results of fractures massif clustering and their dimensional orientation. For the estimation of prospects of development of deposits, or separate sections, we proposed the new cluster-geometric technique of determining the blockiness. In addition, the proposed technique makes it possible to estimate the probability of each of the obtained results, which significantly increases efficiency of risk assessment when designing mining works. It also allows increase in the degree of taking account of the genesis of fracturing and mutual angular correlations between the systems of fracturing, which provides for the possibility to increase the accuracy of assessment of quality of both entire deposit and its separate sections. The technique of fractal analysis of regularities in the fracturing formation for various deposits or their sections, which is based on the comparison of values of fractal dimensionality of the roses of fracturing, was developed. The groups of labradorite deposits were distinguished by index of fractal dimensionality, which allows developing standard technological solutions for each group in order to enhance the effectiveness of quality and productivity control over technological complexes. A map of spatial variability in fractal dimensionality of fracturing in the labradorite deposits of Ukraine was produced, the use of which will make it possible to increase efficiency of discovering new labradorite deposits, which will meet certain quality requirements. The construction of this map will allow enhancing efficiency of the interpretation of conditions for the formation of particular deposits. The patterns of change in fractal dimensionality at the different structural levels were established and the methods for their prediction were developed, which will make it possible, by the results of exploring fractal dimensionality at one of the structural level, to predict their values for others to optimize the process of control over geological exploration and extraction operations. As a result of the performed experimental studies, the influence of fractal dimensionality of fracturing in the blast-hole drilling zone on the productivity of the process was proved. We created objective function of optimal process to control technological processes, based on geostructural and technological indices that were evaluated by generalizing index of fractal dimensionality. The objective function of optimal process of drilling the fractured array, which includes indices of fractal dimensionality of the drilling zone, was proposed. For the first time the regularities of change of primary kaolin samples whiteness depending on the results of determination of colour coordinates, the fractal dimension of the sample surface, the size of scanned samples grains and fractal dimension of grains in the massif are established. For the first time the relationship between the geochemical and geostruсtural parameters of nonmetallic building materials deposits is established and the influence of their spatial variability on the effectiveness of selective extraction of nonmetallic building materials is assessed. Based on the first developed technological coefficient of the contact form, the influence of fractal dimension of conditioned areas contours on the productivity of excavation is established when using selective extraction of nonmetallic building materials. Cluster and fractal technique of determining the volumes, operational noncontact evaluation of spatial variability of quality indicators technique and the method of cluster and crigging averaging of raw materials quality are developed.
Диссертация посвящена решению актуальной научно-практической проблемы управления качеством нерудных строительных материалов на основе геостатистического моделирования для обоснования оптимальных технологических решений, которое заключается в установлении зависимостей природных и технологических параметров, которые оцениваются интегральными показателями качества, реализованными при геостатистическом моделировании эффективности технологических решений. Доказано, что при селективном способе разработки месторождений нерудного строительного сырья управление качеством необходимо осуществлять с учетом фрактальной природы показателей качества, которые определяются по разработанным методикам. Впервые установлены зависимости между количеством трещин и азимутом простирания, между ориентацией отдельных систем трещин, выделенных по результатам кластерного анализа, и оптимальным направлением откола для месторождений декоративного камня, что может быть использовано для прогнозирования направления развития горных работ и управления процессами добычи декоративного камня. Установлено, что эффективность процесса управления технологическими процессами при разработке декоративного камня достигается по результатам оценки геопространственной изменчивости обобщающего показателя фрактальной размерности, который является функцией ориентации трещиноватости, линейных размеров трещин и скорости бурения трещиноватого массива. Впервые выделены группы месторождений нерудных строительных материалов по геоструктурным показателям и фрактальной размерности роз трещиноватости. Установлена взаимосвязь между геохимическими и геоструктурными показателями качества месторождений нерудных строительных материалов и оценено влияние их пространственной изменчивости на эффективность селективной добычи нерудных строительных материалов.
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Книги з теми "Quality coefficients"

1

Parker, Gene W. Estimating reaeration coefficients for low-slope streams in Massachusetts and New York, 1985-88. Marlborough, Mass: U.S. Dept. of the Interior, U.S. Geological Survey, 1992.

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Kalmykov, Sergey, and Nikolay Pashin. Social advertising: designing effective interaction with the target audience. ru: INFRA-M Academic Publishing LLC., 2017. http://dx.doi.org/10.12737/23289.

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The monograph analyzes the possibility of managing the process of socio-advertising influence on socio-demographic groups. The developed methodological bases with the use of the multivariate paradigmatic status of sociological knowledge allowed us to form: principles of designing social advertising interaction, factors of efficiency (quality) of social advertising, a system of sociological quality assurance of social advertising. Insufficiently studied problems of efficiency and quality of social advertising are investigated. The coefficients of the importance of its efficiency factors (quality) are established. Stable interrelations of social advertising influence at the level of revealed correlation coefficients of behavioral reactions of various categories of target audience with their characteristics are proved. The results obtained are summarized in the developed model of behavior of the target audience on the basis of social advertising interaction, and the content modules of the mechanism of controllability of the specified process are proposed.
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Leonovich, Sergey, Evgeniy Shalyy, Elena Polonina, Elena Sadovskaya, Lev Kim, and Valentin Dorkin. Durability of port reinforced concrete structures (Far East and Sakhalin). ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1816638.

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Section I of the monograph is devoted to an urgent problem - forecasting the durability of port reinforced concrete structures, the destruction of which is associated with corrosion of steel reinforcement caused by chloride aggression and carbonation of concrete. The analysis of models for calculating the service life of structures and experimental data is carried out, the life cycles for the main degradation processes in concrete and reinforcement, the periods of initiation and propagation of corrosion are considered, the influence of environmental factors (temperature, humidity) and the quality of concrete (In/C, cement consumption, diffusion coefficient) on the kinetics of chloride penetration and the movement of the carbonation front is taken into account. Probabilistic models of basic variables are considered, the limiting states of port reinforced concrete structures for the durability of reinforced concrete structures based on the reliability coefficient for service life are formulated. Sections II and III describe modern methods of restoration and restoration of reinforced concrete port structures subjected to corrosion destruction using nanofibrobeton. The concept of multilevel reinforcement has been implemented. Methods of experimental fracture mechanics were used to evaluate the joint work of exploited concrete and reinforcement nanofibre concrete. It is intended for scientific and engineering staff of universities, research and design organizations.
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4

Scott Jones, Julie. Learn to Use the Eta Coefficient Test in R With Data From the NIOSH Quality of Worklife Survey (2014). 1 Oliver's Yard, 55 City Road, London EC1Y 1SP United Kingdom: SAGE Publications, Ltd., 2019. http://dx.doi.org/10.4135/9781526495433.

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Scott Jones, Julie. Learn to Use the Eta Coefficient Test in SPSS With Data From the NIOSH Quality of Worklife Survey (2014). 1 Oliver's Yard, 55 City Road, London EC1Y 1SP United Kingdom: SAGE Publications, Ltd., 2019. http://dx.doi.org/10.4135/9781526474681.

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6

Lynn, Taylor R., Washoe County (Nev ), and Geological Survey (U.S.), eds. Reaeration-rate coefficients for two reaches on the Truckee River downstream from Reno, Nevada, 1999. Carson City, Nev: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Lynn, Taylor R., Washoe County (Nev ), and Geological Survey (U.S.), eds. Reaeration-rate coefficients for two reaches on the Truckee River downstream from Reno, Nevada, 1999. Carson City, Nev: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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8

Lynn, Taylor R., Washoe County (Nev ), and Geological Survey (U.S.), eds. Reaeration-rate coefficients for two reaches on the Truckee River downstream from Reno, Nevada, 1999. Carson City, Nev: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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9

Lynn, Taylor R., Washoe County (Nev ), and Geological Survey (U.S.), eds. Reaeration-rate coefficients for two reaches on the Truckee River downstream from Reno, Nevada, 1999. Carson City, Nev: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Lynn, Taylor R., Washoe County (Nev ), and Geological Survey (U.S.), eds. Reaeration-rate coefficients for two reaches on the Truckee River downstream from Reno, Nevada, 1999. Carson City, Nev: U.S. Dept. of the Interior, U.S. Geological Survey, 2000.

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Частини книг з теми "Quality coefficients"

1

Martin, D. L., J. R. Gilley, and R. W. Skaggs. "Crop Coefficients." In Managing Nitrogen for Groundwater Quality and Farm Profitability, 339–41. Madison, WI, USA: Soil Science Society of America, 2015. http://dx.doi.org/10.2136/1991.managingnitrogen.appendix3.

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Piedmont, Ralph L. "Regression Coefficients." In Encyclopedia of Quality of Life and Well-Being Research, 5424–25. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-0753-5_2449.

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Raveh, Adi. "Monotonicity Coefficients." In Encyclopedia of Quality of Life and Well-Being Research, 4107–13. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-0753-5_1840.

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4

Aichinger, Horst, Joachim Dierker, Sigrid Joite-Barfuß, and Manfred Säbel. "Interaction Coefficients." In Radiation Exposure and Image Quality in X-Ray Diagnostic Radiology, 181–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11241-6_14.

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Aichinger, Horst, Joachim Dierker, Sigrid Joite-Barfuß, and Manfred Säbel. "Interaction Coefficients." In Radiation Exposure and Image Quality in X-Ray Diagnostic Radiology, 135–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-09654-3_13.

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6

Kargar, Mohammad Javad, Abdul Rahman Ramli, H. Ibrahim, and F. Azimzadeh. "Formulating Priority Coefficients for Information Quality Criteria on the Blog." In Communications in Computer and Information Science, 396–403. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-89985-3_49.

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7

Galdran, Adrian, Teresa Araújo, Ana Maria Mendonça, and Aurélio Campilho. "Retinal Image Quality Assessment by Mean-Subtracted Contrast-Normalized Coefficients." In VipIMAGE 2017, 844–53. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68195-5_92.

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8

Ait Abdelouahad, Abdelkaher, Mohammed El Hassouni, Hocine Cherifi, and Driss Aboutajdine. "Image Quality Assessment Based on Intrinsic Mode Function Coefficients Modeling." In Communications in Computer and Information Science, 131–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21984-9_12.

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Hong, Sun-Kyong, Myeong-Seon Gil, and Yang-Sae Moon. "Secure Computation of Pearson Correlation Coefficients for High-Quality Data Analytics." In Database Systems for Advanced Applications, 89–98. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91455-8_8.

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10

Dralus, Grzegorz. "The Investigating of Influence of Quality Criteria Coefficients on Global Complex Models." In Artifical Intelligence and Soft Computing, 26–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13232-2_4.

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Тези доповідей конференцій з теми "Quality coefficients"

1

Liang, Shuang, Guanxiang Wang, and Zhengye Zhou. "A Contourlet coefficients based image quality metric." In 2017 International Conference on Wavelet Analysis and Pattern Recognition (ICWAPR). IEEE, 2017. http://dx.doi.org/10.1109/icwapr.2017.8076691.

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2

Alappat, Agnel Lazar, and Vipin Kamble. "Image Quality Assessment using Selective Contourlet Coefficients." In 2020 11th International Conference on Computing, Communication and Networking Technologies (ICCCNT). IEEE, 2020. http://dx.doi.org/10.1109/icccnt49239.2020.9225584.

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3

Chirkova, Galina V., and Gennady S. Zinoviev. "Power quality coefficients for power electronic transformers." In 2016 17th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM). IEEE, 2016. http://dx.doi.org/10.1109/edm.2016.7538805.

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4

Choi, Jung-Young, Ha-Joong Park, Xingang Liu, Kook-Yeol Yoo, and Ho-Youl Jung. "SDTV Quality Assessment Using Energy Distribution of DCT Coefficients." In 2008 International Conference on Embedded Software and Systems. IEEE, 2008. http://dx.doi.org/10.1109/icess.2008.80.

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Gao, Chen, Karen Panetta, and Sos Agaian. "Coefficients training methods for image and video quality measures." In 2015 IEEE International Conference on Imaging Systems and Techniques (IST). IEEE, 2015. http://dx.doi.org/10.1109/ist.2015.7294562.

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Li, Shanshan, and Weiyang Sun. "Image fusion quality evaluation based on quantized DCT coefficients." In Eighth International Conference on Digital Image Processing (ICDIP 2016), edited by Charles M. Falco and Xudong Jiang. SPIE, 2016. http://dx.doi.org/10.1117/12.2244477.

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Mesaros, Annamari, and Simina Moldovan. "Methods for singing voice identification using energy coefficients as features." In 2006 IEEE International Conference on Automation, Quality and Testing, Robotics. IEEE, 2006. http://dx.doi.org/10.1109/aqtr.2006.254623.

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Agrez, Dusan, and Jalen Stremfelj. "Estimation of the Power Quality Changing Parameters Using DFT Coefficients." In 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018). IEEE, 2018. http://dx.doi.org/10.1109/cpem.2018.8500862.

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Angerer, Martin, Michael Zapf, Martin Koch, and Nicole V. Ruiter. "Quality Control of Ultrasound Transducers using distribution-free Overlapping Coefficients." In 2021 IEEE Sensors. IEEE, 2021. http://dx.doi.org/10.1109/sensors47087.2021.9639520.

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"Evaluation of Cover Concrete by Analysis of Chloride Diffusion Coefficients." In SP-229: Quality of Concrete Structures and Recent Advances in Concrete Materials and Testing. American Concrete Institute, 2005. http://dx.doi.org/10.14359/14733.

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Звіти організацій з теми "Quality coefficients"

1

Van Wie, Bernard J. Evaluation of data availability and quality for interaction second virial coefficients of use to the gas industry. Gaithersburg, MD: National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.tn.1249.

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2

Saarnio, Karri, Mika Vestenius, and Katriina Kyllönen. Attestation of conformity of particulate matter measurements (HIVATO) 2019–2020. Finnish Meteorological Institute, December 2021. http://dx.doi.org/10.35614/isbn.9789523361331.

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The National Reference Laboratory for Air Quality (NRL) ensures the high quality of air quality measurements in Finland by organising audits and intercomparison campaigns. In this project, the conformity of the particulate matter measurements was evaluated with a particular focus on the measurement used for calculating the average exposure index (AEI) of Finland. The representativity and applicability of the AEI measurements made at the Kallio station in Helsinki were evaluated. It was noticed that the results of the Kallio measurement represent well the average fine particle (PM2.5) concentrations and the yearly based trend of fine particles in Finland. In addition, the yearly average concentrations of fine particles have been smaller than the AEI limit value of 8.5 µg/m3, at all individual urban background stations in Finland since year 2015. The measurement results made with the PM monitor used for AEI measurement, i.e. TEOM 1405 analyser at the Kallio station, were compared to the results from the reference method that follows the standard SFS-EN 12341:2014. It was noticed that the uncertainty requirement of 25% was reached and therefore the quality of the measurement is sufficient to use it for the calculation of AEI. However, the fine particle concentrations were generally very low and therefore the requirements given in the standard SFS-EN 16450:2017 for an intercomparison against the reference method were not perfectly fulfilled. This report presents also results from intercomparison measurements made for automated continuous measurement systems (AMS). At the Virolahti station and at the Mäkelänkatu station in Helsinki, PM10 and PM2.5 measurements were compared. In Kuopio and in Lahti, intercomparison measurements were made for PM2.5 only. Based on the results from these intercomparisons, the calibration coefficients both for PM10 and PM2.5 were defined for the first time in Finland for a FIDAS 200 analyser that is a new PM monitor in the Finnish market. It was concluded that FIDAS 200 analysers can be used for the PM measurements in Finland when the calibration coefficients are applied for the data; however, one must note that the presented calibration coefficients do not fulfil the requirements given for the demonstration of equivalence (DoE). Nevertheless, these coefficients are recommended to be used until the official coefficients will be delivered from the next DoE campaign. Two AMS (SHARP 5030 and TEOM 1405) were compared to the reference method for the measurements of PM10 and PM2,5 in Virolahti and in Helsinki, respectively. It was revealed that the calibration coefficients based on the DoE in Kuopio (2014–2015) do not always fit ideally at different locations and seasons due to differences in the environmental characteristics of the measurement sites. Therefore, NRL recommends that DoE should be organised every five years and in between the DoE’s so called ongoing-intercomparison measurements should be carried out continuously. In the ongoing-intercomparison, suitability of the calibration coefficients from DoE will be verified in different locations with varying environmental characteristics. The ongoing-intercomparison campaigns should take place at one site from a half a year to one year and after that, the campaign should continue at a different location similarly. This would ensure that the influence of seasonal differences to the suitability of coefficients will be verified at each measurement site.
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3

Goetsch, Arthur L., Yoav Aharoni, Arieh Brosh, Ryszard (Richard) Puchala, Terry A. Gipson, Zalman Henkin, Eugene D. Ungar, and Amit Dolev. Energy Expenditure for Activity in Free Ranging Ruminants: A Nutritional Frontier. United States Department of Agriculture, June 2009. http://dx.doi.org/10.32747/2009.7696529.bard.

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Heat production (HP) or energy expenditure for activity (EEa) is of fundamental nutritional importance for livestock because it determines the proportion of ingested nutrients available for productive functions. Previous estimates of EEa are unreliable and vary widely with different indirect methodologies. This leads to erroneous nutritional strategies, especially when intake on pasture does not meet nutritional requirements and supplementation is necessary for acceptable production. Therefore, the objective of this project was to measure EEa in different classes of livestock (beef cattle and goats) over a wide range of ecological and management conditions to develop and evaluate simple means of prediction. In the first study in Israel, small frame (SF) and large frame (LF) cows (268 and 581 kg) were monitored during spring, summer, and autumn. Feed intake by SF cows per unit of metabolic weight was greater (P < 0.001) than that by LF cows in both spring and summer and their apparent selection of higher quality herbage in spring was greater (P < 0.10) than that of LF cows. SF cows grazed more hours per day and walked longer distances than the LF cows during all seasons. The coefficient of specific costs of activities (kJ•kg BW-0.75•d-1) and of locomotion (J•kg BW-0.75•m-1) were smaller for the SF cows. In the second study, cows were monitored in March, May, and September when they grazed relatively large plots, 135 and 78 ha. Energy cost coefficients of standing, grazing, and horizontal locomotion derived were similar to those of the previous study based on data from smaller plots. However, the energy costs of walking idle and of vertical locomotion were greater than those found by Brosh et al. (2006) but similar to those found by Aharoni et al. (2009). In the third study, cows were monitored in February and May in a 78-ha plot with an average slope of 15.5°, whereas average plot slopes of the former studies ranged between 4.3 and 6.9°. Energy cost coefficients of standing, grazing, and walking idle were greater than those calculated in the previous studies. However, the estimated energy costs of locomotion were lower in the steeper plot. A comparison on a similar HP basis, i.e., similar metabolizable energy (ME) intake, shows that the daily energy spent on activities in relation to daily HP increased by 27% as the average plot slope increased from 5.8 and 6.02 to 15.5°. In the fourth study, cows grazing in a woodland habitat were monitored as in previous studies in December, March, and July. Data analysis is in progress. In the first US experiment, Boer and Spanish does with two kids were used in an experiment beginning in late spring at an average of 24 days after kidding. Two does of each breed resided in eight 0.5-ha grass/forb pastures. Periods of 56, 60, 63, 64, and 73 days in length corresponded to mid-lactation, early post-weaning, the late dry period, early gestation, and mid-gestation. EEa expressed as a percentage of the ME requirement for maintenance plus activity in confinement (EEa%) was not influenced by stocking rate, breed, or period, averaging 49%. Behavioral activities (e.g., time spent grazing, walking, and idle, distance traveled) were not highly related to EEa%, although no-intercept regressions against time spent grazing/eating and grazing/eating plus walking indicated an increase in EEa% of 5.8 and 5.1%/h, respectively. In the second study, animal types were yearling Angora doeling goats, yearling Boer wether goats, yearling Spanish wether goats, and Rambouilletwether sheep slightly more than 2 yr of age. Two animals of each type were randomly allocated to one of four pastures 9.3, 12.3, 4.6, and 1.2 ha in area. The experiment was conducted in the summer with three periods, 30, 26, and 26 days in length. EEa% was affected by an interaction between animal type and period (Angora: 16, 17, and 15; Boer: 60, 67, and 34; Spanish: 46, 62, and 42; sheep: 22, 12, and 22% in periods 1, 2, and 3, respectively (SE = 6.1)). EEa% of goats was predicted with moderate accuracy (R2 = 0.40-0.41) and without bias from estimates of 5.8 and 5.1%/h spent grazing/eating and grazing/eating plus walking, respectively, determined in the first experiment; however, these methods were not suitable for sheep. These methods of prediction are simpler and more accurate than currently recommended for goats by the National Research Council.
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4

Baral, Aniruddha, Jeffrey Roesler, M. Ley, Shinhyu Kang, Loren Emerson, Zane Lloyd, Braden Boyd, and Marllon Cook. High-volume Fly Ash Concrete for Pavements Findings: Volume 1. Illinois Center for Transportation, September 2021. http://dx.doi.org/10.36501/0197-9191/21-030.

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High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This research report helps with the implementation of HVFAC for pavement applications by providing guidelines for HVFAC mix design, testing protocols, and new tools for better quality control of HVFAC properties. Calorimeter tests were performed to evaluate the effects of fly ash sources, cement–fly ash interactions, chemical admixtures, and limestone replacement on the setting times and hydration reaction of HVFAC. To better target the initial air-entraining agent dosage for HVFAC, a calibration curve between air-entraining dosage for achieving 6% air content and fly ash foam index test has been developed. Further, a digital foam index test was developed to make this test more consistent across different labs and operators. For a more rapid prediction of hardened HVFAC properties, such as compressive strength, resistivity, and diffusion coefficient, an oxide-based particle model was developed. An HVFAC field test section was also constructed to demonstrate the implementation of a noncontact ultrasonic device for determining the final set time and ideal time to initiate saw cutting. Additionally, a maturity method was successfully implemented that estimates the in-place compressive strength of HVFAC through wireless thermal sensors. An HVFAC mix design procedure using the tools developed in this project such as the calorimeter test, foam index test, and particle-based model was proposed to assist engineers in implementing HVFAC pavements.
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5

Wei, Fulu, Ce Wang, Xiangxi Tian, Shuo Li, and Jie Shan. Investigation of Durability and Performance of High Friction Surface Treatment. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317281.

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The Indiana Department of Transportation (INDOT) completed a total of 25 high friction surface treatment (HFST) projects across the state in 2018. This research study attempted to investigate the durability and performance of HFST in terms of its HFST-pavement system integrity and surface friction performance. Laboratory tests were conducted to determine the physical and mechanical properties of epoxy-bauxite mortar. Field inspections were carried out to identify site conditions and common early HFST distresses. Cyclic loading test and finite element method (FEM) analysis were performed to evaluate the bonding strength between HFST and existing pavement, in particular chip seal with different pretreatments such as vacuum sweeping, shotblasting, and scarification milling. Both surface friction and texture tests were undertaken periodically (generally once every 6 months) to evaluate the surface friction performance of HFST. Crash records over a 5-year period, i.e., 3 years before installation and 2 years after installation, were examined to determine the safety performance of HFST, crash modification factor (CMF) in particular. It was found that HFST epoxy-bauxite mortar has a coefficient of thermal expansion (CTE) significantly higher than those of hot mix asphalt (HMA) mixtures and Portland cement concrete (PCC), and good cracking resistance. The most common early HFST distresses in Indiana are reflective cracking, surface wrinkling, aggregate loss, and delamination. Vacuum sweeping is the optimal method for pretreating existing pavements, chip seal in particular. Chip seal in good condition is structurally capable of providing a sound base for HFST. On two-lane highway curves, HFST is capable of reducing the total vehicle crash by 30%, injury crash by 50%, and wet weather crash by 44%, and providing a CMF of 0.584 in Indiana. Great variability may arise in the results of friction tests on horizontal curves by the use of locked wheel skid tester (LWST) due both to the nature of vehicle dynamics and to the operation of test vehicle. Texture testing, however, is capable of providing continuous texture measurements that can be used to calculate a texture height parameter, i.e., mean profile depth (MPD), not only for evaluating friction performance but also implementing quality control (QC) and quality assurance (QA) plans for HFST.
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