Bibliografie tematiche / Statistic in engineering

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Letteratura scientifica selezionata sul tema "Statistic in engineering"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 4 febbraio 2022

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Articoli di riviste sul tema "Statistic in engineering"

1

Aslam, Muhammad, e Osama H. Arif. "Multivariate Analysis under Indeterminacy: An Application to Chemical Content Data". Journal of Analytical Methods in Chemistry 2020 (11 luglio 2020): 1–6. http://dx.doi.org/10.1155/2020/1406028.

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Abstract (sommario):
The Hotelling T-squared statistic has been widely used for the testing of differences in means for the multivariate data. The existing statistic under classical statistics is applied when observations in multivariate data are determined, precise, and exact. In practice, it is not necessary that all observations in the data are determined and precise due to measurement in complex situations and under uncertainty environment. In this paper, we will introduce the Hotelling T-squared statistic under neutrosophic statistics (NS) which is the generalization of classical statistics and applied under uncertainty environment. We will discuss the application and advantage of the neutrosophic Hotelling T-squared statistic with the aid of data. From the comparison, we will conclude that the proposed statistic is more adequate and effective in uncertainty.
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2

Ma, Ying Chao, Yan Ping Gao e Yu Han. "The Performance of Kolmogorov–Smirnov Statistic in Noise Identification". Advanced Materials Research 422 (dicembre 2011): 342–46. http://dx.doi.org/10.4028/www.scientific.net/amr.422.342.

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Noise identification is one of the most important issues in radar and sonar engineering, in which Kolmogorov–Smirnov (KS) statistic is widely adopted. Although KS statistic is the most reliable method till now, it does not have high precision as people believe. The performance of KS statistic is studied in this work, while an experiment is carried out to show the precision of KS statistic, including both test and recognition. The result could help researchers decreasing error of using KS statistic in the future.
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3

Hrbek, Vladimír, e Veronika Koudelková. "Grid Indentation and Statistic Deconvolution: Limitations and Accuracy". Key Engineering Materials 731 (marzo 2017): 15–22. http://dx.doi.org/10.4028/www.scientific.net/kem.731.15.

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The evaluation of heterogeneous materials used in civil engineering on the microscopic level has become important aspect in proper understanding of the macroscopic behavior of the material. This contribution aims at advantages and problems related to the technique of grid indentation and at the evaluation of mechanical properties.
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4

Peng, Fei, e Honglin Li. "A Steganalysis Method for 2D Engineering Graphics Based on the Statistic of Geometric Features". International Journal of Digital Crime and Forensics 3, n. 2 (aprile 2011): 35–40. http://dx.doi.org/10.4018/jdcf.2011040103.

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Abstract (sommario):
Aiming at hiding information in 2D engineering graphics based on geometric features, a steganalysis method is proposed in this paper. First, the authors obtained the number of 2D engineering graphics’ strictly vertical and horizontal lines and identify the number of horizontal and vertical lines which are deviated from the straight line within a certain range. Subsequently, the authors selected the ratio between the deviated lines and the normal lines as the statistical characteristics. Finally, a detection model was constructed based on the hypothesis. Experimental results show that the algorithm can detect hidden information in the 2D engineering graphics effectively.
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5

Scott, Nicholas, Tetsu Hara, Paul A. Hwang e Edward J. Walsh. "Directionality and Crest Length Statistics of Steep Waves in Open Ocean Waters". Journal of Atmospheric and Oceanic Technology 22, n. 3 (1 marzo 2005): 272–81. http://dx.doi.org/10.1175/jtech1703.1.

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Abstract A new wavelet analysis methodology is applied to open ocean wave height data from the Southern Ocean Waves Experiment (1992) and from a field experiment conducted at Duck, North Carolina, in 1997 with the aim of estimating the directionality and crest lengths of steep waves. The crest directionality statistic shows that most of the steep wave crests are normal to the direction of the mean wind. This is inconsistent with the Fourier wavenumber spectrum that shows a broad bimodal directional spreading at high wavenumbers. The crest length statistics demonstrate that the wave field is dominated by short-crested waves with small crest length/wavelength ratios. The one-dimensional steep wave statistic obtained from the integration of the directional (two dimensional) steep wave statistic is consistent with the one-dimensional steep wave statistic obtained from the one-dimensional analysis at high wave slope thresholds.
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Issa, Salah F., Kiana Patrick, Steven Thomson e Bradley Rein. "Estimating the Number of Agricultural Fatal Injuries Prevented by Agricultural Engineering Developments in the United States". Safety 5, n. 4 (25 settembre 2019): 63. http://dx.doi.org/10.3390/safety5040063.

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Agriculture has been consistently marked as one of the deadliest industries by the United States Bureau of Labor Statistics (BLS). While this statistic is widely used in promoting agricultural safety and health, it does not paint a complete picture on the current status of agricultural safety and the advances that have been made in the last century. For example, even with a stagnant rate of injury, the BLS has reported that fatal incidents decreased from a high of 855 incidents in 1993 to a low of 500 incidents in 2013. The purpose of this study was to analyze the impact that agricultural engineering developments had on reducing fatal injuries. Agricultural engineering developments are defined as any agricultural improvement that results in a direct reduction in the amount of labor needed. This study uses existing federal agricultural statistical, injury and demographic data to calculate the impact that engineering, in contrast to yield improvements and safety enhancements, contributed to a reduction in the number of fatal incidents. The study found that engineering developments could have contributed to the reduction in the number of fatal injuries by about 170 incidents from 1992 to 2015. This represents 63% of the total reduction in the number of fatal injuries. In conclusion, agricultural engineering developments play a substantial role in reducing the number of fatal incidents by removing and reducing labor exposure to hazardous environments.
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Scott, Nicholas, Tetsu Hara, Edward J. Walsh e Paul A. Hwang. "Observations of Steep Wave Statistics in Open Ocean Waters". Journal of Atmospheric and Oceanic Technology 22, n. 3 (1 marzo 2005): 258–71. http://dx.doi.org/10.1175/jtech1702.1.

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Abstract (sommario):
Abstract A new wavelet analysis methodology is proposed to estimate the statistics of steep waves. The method is applied to open ocean wave height data from the Southern Ocean Waves Experiment (1992) and from a field experiment conducted at Duck, North Carolina (1997). Results show that high wave slope crests appear over a wide range of wavenumbers, with a large amount being much shorter than the dominant wave. At low wave slope thresholds, all wave fields have roughly the same amount of wave crests regardless of wind forcing. The steep wave statistic decays exponentially with the square of the wave slope threshold, with a decay rate that is larger for the low wind cases than the high wind cases. Comparison of the steep wave statistic with independent measurements of the breaking wave statistic suggests a breaking wave slope threshold of about 0.12. The steep wave statistic does not scale with the cube of the wind speed, suggesting that other factors besides the wind speed also affect its level. Comparison of the steep wave statistic to the saturation spectrum reveals a reasonable correlation at moderate wave slope thresholds.
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8

Capuruço, Renato A. C., Tarek Hegazy, Susan L. Tighe e Sameh Zaghloul. "Full-Car Roughness Index as Summary Roughness Statistic". Transportation Research Record: Journal of the Transportation Research Board 1905, n. 1 (gennaio 2005): 148–56. http://dx.doi.org/10.1177/0361198105190500116.

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The international roughness index (IRI) and the half-car roughness index (HRI) are the two commonly used roughness indices for pavement management, decision making, prioritization, budgeting, and planning. This work presents a new statistic, termed the full-car roughness index (FRI), for calculation of roughness from longitudinal pavement profiles. FRI is calculated from a single, equivalent profile that is a composite of four corner profiles based on both civil and mechanical engineering principles. More specifically, the full-car (four-wheel) model combines the rear and front suspension systems through an interdependent relation of motion with the longitudinal axle. To validate this model, the FRI values for different pavement sections are determined for sampling roughness measurements from several states and provinces. Then, the behavior of FRI is compared with that of IRI and HRI. The methodology of assessment uses a Monte Carlo simulation for calibration and validation of the index. Correlations derived from this sensitivity analysis on the basis of regression analysis arrive at a conversion chart to propose conversion values from these indices to FRIs. Overall, this paper suggests that the mechanical response of the proposed full-car model is more representative of the characteristics of a real vehicle than the response of a quarter- or half-car model. The results also indicate that FRI is less sensitive to the governing factors that account for the quarter-car simulation and thus provides an index that is unique, insightful, and more effective in the characterization of ride quality.
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Mosia, Ngaka. "Adaptive Learning Implementation – A Cognitive Description Experiment for First Year Engineering Students at a Distance Education University". EDEN Conference Proceedings, n. 1 (21 ottobre 2020): 124–30. http://dx.doi.org/10.38069/edenconf-2020-rw-0014.

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A study was performed on a first year industrial engineering statistics course to improve the statistics pass rate. Statistics is a requisite for other engineering courses. The pass rate for the statistic course was below 50%. The primary purpose is to enable learners to build a capacity to comprehend module content and establish a deeper level of learning that will enable learners to achieve goals and objectives of TL lessons. An intervention program was instructionally designed to develop a personalized and differentiated learning process that breaks down lessons into lower and basic components, for struggling learners, and improves lessons to a complex high level and challenging activities for excelling students. Forty students were considered for the study. Moore’s theory of transactional distance was used as a theoretical framework. The data consisted of exam and assignment scores. A quantitative method was used to analyse the data. Hypothesis testing suggests that the intervention program is significant. The overall pass rates improved by 25%.
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Xie, Hui, Feng Hua Wang e Zhi Tao Huang. "Blind Recognition of Reed-Solomon Codes Based on Histogram Statistic of Galois Field Spectra". Advanced Materials Research 791-793 (settembre 2013): 2088–91. http://dx.doi.org/10.4028/www.scientific.net/amr.791-793.2088.

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We focus on the recognition of RS code in a reverse-engineering communication system, and an algorithm based on spectral statistic is proposed, which makes use of the spectral characteristics of RS code. When there are some codes with errors in the observations, the spectral histogram statistic is computed, which can improve the probability of detection in the noisy environment. Experimental results are given to illustrate the performances of the method which can get a 90% probability of detection of (255, 223) RS code in the presence of 0.5% code error rate.
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Più fonti

Tesi sul tema "Statistic in engineering"

1

Yap, Tammy 1976. "SCAN : a statistic code analyser for JavaScheme". Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80578.

Testo completo
Abstract (sommario):
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
Includes bibliographical references (p. 45).
by Tammy Yap.
S.B.and M.Eng.
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2

Birkestedt, Sara, e Andreas Hansson. "Can web-based statistic services be trusted?" Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5282.

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Abstract (sommario):
A large number of statistic services exist today, which shows that there is a great interest in knowing more about the visitors on a web site. But how reliable is the result the services are giving? The hypothesis examined in the thesis is: Web-based statistic services do not show an accurate result The purpose of the thesis is to find out how accurate the web-based statistic services are regarding unique visitors and number of pages viewed. Our hope is that this thesis will bring more knowledge about the different statistic services that exists today and the problems surrounding them. We will also draw attention to the importance of knowing how your statistic software works to be able to interpret the results correctly. To investigate this, we chose to do practical tests on a selection of web-based statistic services. The services registered the traffic from the same web site during a test period. During the same period a control program registered the same things and stored the result in a database. In addition to the test, we have done an interview with a person working with web statistics. The investigation showed that there are big differences between the results from the web-based statistic services in the test and that none of them showed an accurate result, neither for the total number of page views nor unique visitors. This led us to the conclusion that web-based statistic services do not show an accurate result, which verifies our hypothesis. Also the interview confirmed that there is a problem with measuring web statistics.
Ett stort antal statistiksystem existerar idag för att ta reda på information om besökare på webbplatser. Men hur pålitliga är egentligen dessa tjänster? Syftet med uppsatsen är att ta reda på hur pålitliga de är när det gäller att visa antal unika besökare och totalt antal sidvisningar. Hypotesen vi har formulerat är: Webb-baserade statistiksystem visar inte ett korrekt resultat. För att testa detta har vi gjort praktiska tester av fem olika webb-baserade statistiktjänster som användes på samma webbplats under samma period. Informationen som dessa tjänster registrerade lagrade vi i en databas, samtidigt som vi använde ett eget kontrollprogram för att mäta samma uppgifter. Vi har också genomfört en intervju med en person som arbetar med webbstatistik på ett webbföretag. Undersökningen visar att resultatet mellan de olika tjänsterna skiljer sig mycket, både jämfört med varandra och med kontrollprogrammet. Detta gällde både antal sidvisningar och unika besökare. Detta leder till slutsatsen att systemen inte visar korrekta uppgifter, vilket gör att vi kan verifiera vår hypotes. Även intervjun som utfördes visade på de problem som finns med att mäta besökarstatistik.
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3

Cepel, Raina. "The spatial cross-correlation coefficient as an ultrasonic detection statistic". Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/5054.

Testo completo
Abstract (sommario):
Thesis (M.S.)--University of Missouri-Columbia, 2007.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 7, 2008) Includes bibliographical references.
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4

Mate, Samuel Spicer. "Anthropometric human modeling on the shape manifold". Thesis, University of Iowa, 2016. https://ir.uiowa.edu/etd/3139.

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Abstract (sommario):
The accuracy of modern digital human models has led to the development of human simulation engines capable of performing a complex analysis of the biometrics and kinematics / dynamics of a digital model. While the capabilities of these simulations have seen much progress in recent years, they are hindered by a fundamental limitation regarding the diversity of the models compatible with the simulation engine, which in turn results in a reduction in the scope of the applications available to the simulation. This is typically due to the necessary implementation of a musculoskeletal structure within the model, as well as the inherent mass and inertial data that accompany it. As a result a significant amount of time and expertise is required to make a digital human model compatible with the simulation. In this research I present a solution to this limitation by outlining a process to develop a set of mutually compatible human models that spans the range of feasible body shapes and allows for a “free” exploration of body shape within the shape manifold. Additionally, a method is presented to represent the human body shapes with a reduction of dimensionality, via a spectral shape descriptor, that enables a statistical analysis that is both more computationally efficient and anthropometrically accurate than traditional methods. This statistical analysis is then used to develop a set of representative models that succinctly represent the full scope of human body shapes across the population, with applications reaching beyond the research-oriented simulations into commercial human-centered product design and digital modeling.
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5

Isaksson, Nils, e Helena Lundström. "Dammsäkerhetsutvärdering samt utformning av dammregister och felrapporteringssystem för svenska gruvdammar". Thesis, Uppsala University, Department of Earth Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88834.

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Abstract (sommario):

A lot of mine waste rock and tailings arise from all mining processes and have to be stored in an appropriate way. Tailings are deposited in impoundments retained by tailings dams. The objective of tailings dams is to retain the slurry from the mining process and in that way prevent spill into the surroundings that might be harmful for the environment. Tailings dams are often constructed as staged embankments so that construction costs and demand of materials are spread more evenly over the period of deposition.

The objective of this thesis has been to compile information about and evaluate events at Swedish tailings dams and also to develop a collective database for all Swedish mining companies for all tailings dams and all events that occur at tailings dams.

Information about 60 events at Swedish tailings dams has been gathered and evaluated. The evaluation has been performed by comparison between and analysis of individual parameters and also by use of a multivariate statistical method called PLS. The statistical analysis shows a decrease in the numbers of events during the last five years, which indicates improved dam safety within the mining industry. The analysis also shows that severe events and the human factor might be related when it comes to the initiating cause of the event. Further relations between the parameters and the severity of the events can be seen from the PLS-analysis, for example that low and short tailings dams to a greater extent are subjected to severe events. To be able to draw more reliable conclusions further studies with a more complete basic data are needed.

This work has shown a need of a collective database within the Swedish mining industry for tailings dams and occurring events at tailings dams so that more complete basic data could be obtained for future studies. A structure for such a database has been developed in Microsoft Access 2000. The aim of the database is to facilitate feedback within the mining industry and to gather comprehensive data for future statistical evaluations.


Vid alla gruvprocesser skapas stora mängder restprodukter i form av gråberg och anrikningssand som måste tas om hand på lämpligt sätt. Anrikningssanden deponeras tillsammans med vatten från gruvprocessen i magasin omgärdade av dammvallar, s.k. gruvdammar. Gruvdammar har som syfte att hålla kvar anrikningssand och vatten och måste vara stabila så att de skyddar omgivningen från utsläpp av anrikningssand som skulle kunna vara skadligt för miljön. En gruvdamm byggs ofta upp i etapper eftersom byggkostnaderna och behovet av dammfyllnadsmaterial då sprids över tiden.

Syftet med arbetet har varit att sammanställa och utvärdera händelser vid svenska gruvdammar samt att utforma ett för gruvindustrin gemensamt dammregister och felrapporteringssystem.

60 händelser vid svenska gruvdammar har sammanställts och utvärderats. Utvärderingen har genomförts dels genom att enskilda parametrar jämförts och analyserats och dels med hjälp av den multivariata analysmetoden PLS. Den statistiska analysen visar på en minskning i antal händelser under de senaste fem åren, vilket tyder på ett förbättrat dammsäkerhetsarbete inom gruvindustrin. Analysen har kunnat uppvisa ett samband mellan allvarliga händelser och den mänskliga faktorn när det gäller vad det är som initierat händelserna. Genom PLS-analysen har ytterligare samband mellan de undersökta parametrarna och allvarlighetsgraden av händelserna kunnat utläsas, bl.a. visar analysen att låga och korta dammar i större utsträckning drabbas av allvarliga händelser jämfört med höga och långa dammar. För att säkra slutsatser ska kunna dras krävs dock vidare studier med ett mer komplett statistiskt underlag.

Examensarbetet har påvisat ett behov av ett branchgemensamt damm- och felrapporteringsregister för att ett mer komplett underlag ska kunna erhållas i framtiden. En färdig databasstruktur för ett sådant dammregister och felrapporteringsregister för svenska gruvdammar har utformats. Databasen är uppbyggd i Microsoft Access 2000 och är tänkt att underlätta erfarenhetsåterföring inom branschen samt att ge ett underlag för framtida statistiska undersökningar.

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6

Hong, Sui. "Experiments with K-Means, Fuzzy c-Means and Approaches to Choose K and C". Honors in the Major Thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1224.

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Abstract (sommario):
This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf
Bachelors
Engineering and Computer Science
Computer Engineering
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7

Torres, Ariela da Silva. "Corrosão por cloretos em estruturas de concreto armado : uma meta-análise". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2011. http://hdl.handle.net/10183/29405.

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Abstract (sommario):
O concreto é o segundo material mais consumido no mundo, perdendo somente para água, justificando a importância de estudos que envolvam seu comportamento frente à durabilidade, e que objetivam a obtenção de estruturas com longas vidas úteis. Dentre as diversas manifestações patológicas que ocorrem nas estruturas de concreto armado, a corrosão das armaduras tem uma grande incidência, como já comprovado por diversos autores. A corrosão das armaduras ocorre pela ação de agentes agressivos sendo que os dois principais são a carbonatação e a penetração de cloretos. Em função da grande costa marítima do Brasil, a ação de íons cloretos é a mais significativa, deteriorando estruturas e levando a necessidade de manutenções periódicas. Porém, sabe-se do alto custo para realização destas manutenções. Em função da preocupação com a manutenção e gastos das estruturas de concreto armado, este estudo objetivou realizar uma validação dos ensaios de corrosão por cloretos em estruturas de concreto armado a partir de meta-análise dos dados de técnicas eletroquímicas utilizadas nos trabalhos de teses e dissertações desenvolvidos no Brasil. Pretende-se desta maneira realizar um mapeamento das pesquisas na área de corrosão em armaduras de concreto armado realizadas no Brasil e direcionar os futuros estudos. Pretende-se também realizar uma análise conjunta de todos estes trabalhos para verificar a quantidade e qualidade dos mesmos sob uma visão do conjunto nacional. Registrou-se a falta de pesquisas na região Norte do país e a centralização das mesmas nas regiões Sudeste e Sul. Com o uso de técnicas estatísticas conclui-se a falta de diversas combinações de variáveis (relação água/cimento, tipo de cimento, método de indução de cloretos, adição de materiais, entre outros) para criação de um modelo brasileiro confiável.
Concrete is the second most consumed material in the world, second only to water, explaining the importance of studies involving behavior concerning durability, and aimed to obtain structures with long lifetimes. Among the various pathologics that occur in reinforced concrete structures, corrosion of the reinforcement has a major impact, as proven by several authors. The reinforcement corrosion occurs by the action of aggressive agents and the two main ones are carbonation and chloride penetration. Due to the great sea coast of Brazil, the action of chloride ions is the most significant and deteriorating structures leading to the need for periodic maintenance, but it is known the high cost of implementing these maintenances. Because of concerns with the maintenance and expense of concrete structures, this study aimed to perform a validation of the corrosion by chlorides in reinforced concrete structures from the meta-analysis of data from electrochemical techniques used in the work of theses and dissertations developed in Brazil. The aim is thus to map the research on corrosion in reinforced concrete made in Brazil and direct future studies. Also perform a joint analysis of all these works to verify the quantity and quality of these in a vision of the National Assembly. We observed the lack of research in the northern region of the country and centralizing them in the Southeast and South By using statistical techniques concludes the lack of various combinations of variables (water / cement ratio, cement type, method induction of chloride, addition of materials, among others) to create a Brazilian model reliable.
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8

Nilsson, Marcus, e Stefan Borgström. "Pokerboten". Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20655.

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Abstract (sommario):
Syftet med följande examensarbete är att undersöka teorier och få fram idéer om hur man kan bygga en bot som spelar poker. Ett viktigt ämne som studeras är artificiell intelligens och hur ett AI kan utvecklas hos en bot som ska ersätta en mänsklig pokerspelare spelandes i ett nätverk. Studien ger en inblick om spelregler för Texas Hold’em och går även in på teori om betydelsefull statistik, sannolikhet och odds. Resultatet av denna undersökning består av framtagna algoritmer som kan användas vid utveckling av en bot som spelar poker på ett bord med tio spelare.
The aim of the following thesis is to explore and develop ideas on how to build a bot that plays poker. An important topic that is studied is artificial intelligence and how an AI is implemented for a bot that replaces a human poker player playing in a network.The study provides insight of the playing rules for Texas Hold’em and theory of meaningful statistics, probability and odds will be used.The results of this study consist of algorithms that can be used in the development of a bot that plays poker on a table with ten players.
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9

Raj, Alvin Andrew. "Ambiguous statistics - how a statistical encoding in the periphery affects perception". Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/79214.

Testo completo
Abstract (sommario):
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2013.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 159-163).
Recent understanding in human vision suggests that the periphery compresses visual information to a set of summary statistics. Some visual information is robust to this lossy compression, but others, like spatial location and phase are not perfectly represented, leading to ambiguous interpretations. Using the statistical encoding, we can visualize the information available in the periphery to gain intuitions about human performance in visual tasks, which have implications for user interface design, or more generally, whether the periphery encodes sufficient information to perform a task without additional eye movements. The periphery is most of the visual field. If it undergoes these losses of information, then our perception and ability to perform tasks efficiently are affected. We show that the statistical encoding explains human performance in classic visual search experiments. Based on the statistical understanding, we also propose a quantitative model that can estimate the average number of fixations humans would need to find a target in a search display. Further, we show that the ambiguities in the peripheral representation predict many aspects of some illusions. In particular, the model correctly predicts how polarity and width affects the Pinna-Gregory illusion. Visualizing the statistical representation of the illusion shows that many qualitative aspects of the illusion are captured by the statistical ambiguities. We also investigate a phenomena known as Object Substitution Masking (OSM), where the identity of an object is impaired when a sparse, non-overlapping, and temporally trailing mask surrounds that object. We find that different types of grouping of object and mask produce different levels of impairment. This contradicts a theory about OSM which predicts that grouping should always increase masking strength. We speculate some reasons for why the statistical model of the periphery may explain OSM.
by Alvin Andrew Raj.
Ph.D.
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10

Marco, Almagro Lluís. "Statistical methods in Kansei engineering studies". Doctoral thesis, Universitat Politècnica de Catalunya, 2011. http://hdl.handle.net/10803/85059.

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Aquesta tesi doctoral tracta sobre Enginyeria Kansei (EK), una tècnica per traslladar emocions transmeses per productes en paràmetres tècnics, i sobre mètodes estadístics que poden beneficiar la disciplina. El propòsit bàsic de l'EK és descobrir de quina manera algunes propietats d'un producte transmeten certes emocions als seus usuaris. És un mètode quantitatiu, i les dades es recullen típicament fent servir qüestionaris. S'extreuen conclusions en analitzar les dades recollides, normalment usant algun tipus d'anàlisi de regressió. L'EK es pot situar en l'àrea de recerca del disseny emocional. La tesi comença justificant la importància del disseny emocional. Com que el rang de tècniques usades sota el nom d'EK és extens i no massa clar, la tesi proposa una definició d'EK que serveix per delimitar el seu abast. A continuació, es suggereix un model per desenvolupar estudis d'EK. El model inclou el desenvolupament de l'espai semàntic – el rang d'emocions que el producte pot transmetre – i l'espai de propietats – les variables tècniques que es poden modificar en la fase de disseny. Després de la recollida de dades, l'etapa de síntesi enllaça ambdós espais (descobreix com diferents propietats del producte transmeten certes emocions). Cada pas del model s'explica detalladament usant un estudi d'EK realitzat per aquesta tesi: l'experiment dels sucs de fruites. El model inicial es va millorant progressivament durant la tesi i les dades de l'experiment es van reanalitzant usant noves propostes.Moltes inquietuds pràctiques apareixen quan s'estudia el model per a estudis d'EK esmentat anteriorment (entre d'altres, quants participants són necessaris i com es desenvolupa la sessió de recollida de dades). S'ha realitzat una extensa revisió bibliogràfica amb l'objectiu de respondre aquestes i altres preguntes. Es descriuen també les aplicacions d'EK més habituals, juntament amb comentaris sobre idees particularment interessants de diferents articles. La revisió bibliogràfica serveix també per llistar quines són les eines més comunament utilitzades en la fase de síntesi.La part central de la tesi se centra precisament en les eines per a la fase de síntesi. Eines estadístiques com la teoria de quantificació tipus I o la regressió logística ordinal s'estudien amb detall, i es proposen diverses millores. En particular, es proposa una nova forma gràfica de representar els resultats d'una regressió logística ordinal. S'introdueix una tècnica d'aprenentatge automàtic, els conjunts difusos (rough sets), i s'inclou una discussió sobre la seva idoneïtat per a estudis d'EK. S'usen conjunts de dades simulades per avaluar el comportament de les eines estadístiques suggerides, la qual cosa dóna peu a proposar algunes recomanacions.Independentment de les eines d'anàlisi utilitzades en la fase de síntesi, les conclusions seran probablement errònies quan la matriu del disseny no és adequada. Es proposa un mètode per avaluar la idoneïtat de matrius de disseny basat en l'ús de dos nous indicadors: un índex d'ortogonalitat i un índex de confusió. S'estudia l'habitualment oblidat rol de les interaccions en els estudis d'EK i es proposa un mètode per incloure una interacció, juntament amb una forma gràfica de representar-la. Finalment, l'última part de la tesi es dedica a l'escassament tractat tema de la variabilitat en els estudis d'EK. Es proposen un mètode (basat en l'anàlisi clúster) per segmentar els participants segons les seves respostes emocionals i una forma d'ordenar els participants segons la seva coherència en valorar els productes (usant un coeficient de correlació intraclasse). Com que molts usuaris d'EK no són especialistes en la interpretació de sortides numèriques, s'inclouen representacions visuals per a aquests dos nous mètodes que faciliten el processament de les conclusions.
Esta tesis doctoral trata sobre Ingeniería Kansei (IK), una técnica para trasladar emociones transmitidas por productos en parámetros técnicos, y sobre métodos estadísticos que pueden beneficiar la disciplina. El propósito básico de la IK es descubrir de qué manera algunas propiedades de un producto transmiten ciertas emociones a sus usuarios. Es un método cuantitativo, y los datos se recogen típicamente usando cuestionarios. Se extraen conclusiones al analizar los datos recogidos, normalmente usando algún tipo de análisis de regresión.La IK se puede situar en el área de investigación del diseño emocional. La tesis empieza justificando la importancia del diseño emocional. Como que el rango de técnicas usadas bajo el nombre de IK es extenso y no demasiado claro, la tesis propone una definición de IK que sirve para delimitar su alcance. A continuación, se sugiere un modelo para desarrollar estudios de IK. El modelo incluye el desarrollo del espacio semántico – el rango de emociones que el producto puede transmitir – y el espacio de propiedades – las variables técnicas que se pueden modificar en la fase de diseño. Después de la recogida de datos, la etapa de síntesis enlaza ambos espacios (descubre cómo distintas propiedades del producto transmiten ciertas emociones). Cada paso del modelo se explica detalladamente usando un estudio de IK realizado para esta tesis: el experimento de los zumos de frutas. El modelo inicial se va mejorando progresivamente durante la tesis y los datos del experimento se reanalizan usando nuevas propuestas. Muchas inquietudes prácticas aparecen cuando se estudia el modelo para estudios de IK mencionado anteriormente (entre otras, cuántos participantes son necesarios y cómo se desarrolla la sesión de recogida de datos). Se ha realizado una extensa revisión bibliográfica con el objetivo de responder éstas y otras preguntas. Se describen también las aplicaciones de IK más habituales, junto con comentarios sobre ideas particularmente interesantes de distintos artículos. La revisión bibliográfica sirve también para listar cuáles son las herramientas más comúnmente utilizadas en la fase de síntesis. La parte central de la tesis se centra precisamente en las herramientas para la fase de síntesis. Herramientas estadísticas como la teoría de cuantificación tipo I o la regresión logística ordinal se estudian con detalle, y se proponen varias mejoras. En particular, se propone una nueva forma gráfica de representar los resultados de una regresión logística ordinal. Se introduce una técnica de aprendizaje automático, los conjuntos difusos (rough sets), y se incluye una discusión sobre su idoneidad para estudios de IK. Se usan conjuntos de datos simulados para evaluar el comportamiento de las herramientas estadísticas sugeridas, lo que da pie a proponer algunas recomendaciones. Independientemente de las herramientas de análisis utilizadas en la fase de síntesis, las conclusiones serán probablemente erróneas cuando la matriz del diseño no es adecuada. Se propone un método para evaluar la idoneidad de matrices de diseño basado en el uso de dos nuevos indicadores: un índice de ortogonalidad y un índice de confusión. Se estudia el habitualmente olvidado rol de las interacciones en los estudios de IK y se propone un método para incluir una interacción, juntamente con una forma gráfica de representarla. Finalmente, la última parte de la tesis se dedica al escasamente tratado tema de la variabilidad en los estudios de IK. Se proponen un método (basado en el análisis clúster) para segmentar los participantes según sus respuestas emocionales y una forma de ordenar los participantes según su coherencia al valorar los productos (usando un coeficiente de correlación intraclase). Puesto que muchos usuarios de IK no son especialistas en la interpretación de salidas numéricas, se incluyen representaciones visuales para estos dos nuevos métodos que facilitan el procesamiento de las conclusiones.
This PhD thesis deals with Kansei Engineering (KE), a technique for translating emotions elicited by products into technical parameters, and statistical methods that can benefit the discipline. The basic purpose of KE is discovering in which way some properties of a product convey certain emotions in its users. It is a quantitative method, and data are typically collected using questionnaires. Conclusions are reached when analyzing the collected data, normally using some kind of regression analysis. Kansei Engineering can be placed under the more general area of research of emotional design. The thesis starts justifying the importance of emotional design. As the range of techniques used under the name of Kansei Engineering is rather vast and not very clear, the thesis develops a detailed definition of KE that serves the purpose of delimiting its scope. A model for conducting KE studies is then suggested. The model includes spanning the semantic space – the whole range of emotions the product can elicit – and the space of properties – the technical variables that can be modified in the design phase. After the data collection, the synthesis phase links both spaces; that is, discovers how several properties of the product elicit certain emotions. Each step of the model is explained in detail using a KE study specially performed for this thesis: the fruit juice experiment. The initial model is progressively improved during the thesis and data from the experiment are reanalyzed using the new proposals. Many practical concerns arise when looking at the above mentioned model for KE studies (among many others, how many participants are used and how the data collection session is conducted). An extensive literature review is done with the aim of answering these and other questions. The most common applications of KE are also depicted, together with comments on particular interesting ideas from several papers. The literature review also serves to list which are the most common tools used in the synthesis phase. The central part of the thesis focuses precisely in tools for the synthesis phase. Statistical tools such as quantification theory type I and ordinal logistic regression are studied in detail, and several improvements are suggested. In particular, a new graphical way to represent results from an ordinal logistic regression is proposed. An automatic learning technique, rough sets, is introduced and a discussion is included on its adequacy for KE studies. Several sets of simulated data are used to assess the behavior of the suggested statistical techniques, leading to some useful recommendations. No matter the analysis tools used in the synthesis phase, conclusions are likely to be flawed when the design matrix is not appropriate. A method to evaluate the suitability of design matrices used in KE studies is proposed, based on the use of two new indicators: an orthogonality index and a confusion index. The commonly forgotten role of interactions in KE studies is studied and a method to include an interaction in KE studies is suggested, together with a way to represent it graphically. Finally, the untreated topic of variability in KE studies is tackled in the last part of the thesis. A method (based in cluster analysis) for finding segments among subjects according to their emotional responses and a way to rank subjects based on their coherence when rating products (using an intraclass correlation coefficient) are proposed. As many users of Kansei Engineering are not specialists in the interpretation of the numerical output from statistical techniques, visual representations for these two new proposals are included to aid understanding.
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Libri sul tema "Statistic in engineering"

1

Scopino, John A. Profiles--electrical/electronics engineering: Human resources and funding. [Washington, D.C.]: National Science Foundation, 1988.

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National Science Foundation (U.S.), a cura di. Profiles--electrical/electronics engineering: Human resources and funding. [Washington, D.C.]: National Science Foundation, 1988.

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Scopino, John A. Profiles--electrical/electronics engineering: Human resources and funding. [Washington, D.C.]: National Science Foundation, 1988.

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Scopino, John A. Profiles--electrical/electronics engineering: Human resources and funding. [Washington, D.C.]: National Science Foundation, 1988.

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Joaquim P. Marques de Sá. Applied Statistics Using SPSS, STATISTICA and MATLAB. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003.

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C, Runger George, e Hubele Norma Faris 1953-, a cura di. Engineering statistics. 3a ed. New York: Wiley, 2004.

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C, Runger George, e Hubele Norma Faris 1953-, a cura di. Engineering statistics. 5a ed. Hoboken, NJ: John Wiley, 2011.

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Johannes, Ledolter, a cura di. Engineering statistics. New York: Macmillan, 1987.

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C, Runger George, e Hubele Norma Faris 1953-, a cura di. Engineering statistics. 2a ed. New York: John Wiley, 2001.

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C, Runger George, e Hubele Norma Faris 1953-, a cura di. Engineering statistics. 4a ed. Hoboken, NJ: John Wiley, 2007.

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Capitoli di libri sul tema "Statistic in engineering"

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Niu, Gang. "Statistic Feature Extraction". In Data-Driven Technology for Engineering Systems Health Management, 101–38. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-2032-2_5.

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Gao, Yun, Hao Zhou e Xuejie Zhang. "Detecting Motion Regions Using Statistic Parameters". In Lecture Notes in Electrical Engineering, 1177–85. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-4981-2_128.

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Sun, Yuewen, Han Feng, Shengli Jia, Yang Tian, Cong Li e Fan Zhang. "Multi-factor Fracturing Evaluation Template Based on Mathematical Statistic Methods". In Lecture Notes in Electrical Engineering, 1617–24. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5959-4_197.

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Xin, Yi, Bingzhao Li e Wenwang Zhao. "Chirp Watermark Detection Based on Fractional Auto-correlation Statistic". In Recent Advances in Computer Science and Information Engineering, 217–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-25792-6_33.

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Xu, Yan, Jui-Chan Huang, Tzu-Jung Wu e Ching-Chang Lee. "Relationships Among Latent Growth Curve Model, Statistic Power, and Sample Size". In Lecture Notes in Electrical Engineering, 175–83. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-5959-4_22.

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Zhu, Mingxia, e Chenling Li. "Research on Psychological Chinese-Style Hatred Based on Mathematical Statistic Law". In Lecture Notes in Electrical Engineering, 723–28. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-4790-9_94.

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Wei, Junling, e Chenling Li. "Research on Education Model of and Diversity Based on Mathematical Statistic Law". In Lecture Notes in Electrical Engineering, 329–35. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-4790-9_42.

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Cui, Jianfeng, e Tao Xiong. "Analysis of College Students’ Employment and Entrepreneurship Based on Mathematical Statistic Law". In Lecture Notes in Electrical Engineering, 635–42. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4853-1_78.

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Deng, Kun. "Research on Review Statistic Based on Linear Regression Equation and Modern Communication". In Lecture Notes in Electrical Engineering, 483–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40618-8_64.

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Shi, Xiaofei, Xu Zhang, Derui Song e DeJun Zou. "Coastline Detection with a Spatial Second-Order Correlation Statistic for SAR Imagery". In Lecture Notes in Electrical Engineering, 1764–67. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-8411-4_232.

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Atti di convegni sul tema "Statistic in engineering"

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Hu, Hongtao, e Zhongliang Jing. "Improved Current Statistic Model and Adaptive Filtering". In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85726.

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Current statistical model needs to pre-define the value of maximum accelerations of maneuvering targets. So it may be difficult to meet all maneuvering conditions. In this paper a novel adaptive algorithm for tracking maneuvering targets is proposed. The algorithm is implemented with fuzzy-controlled current statistic model adaptive filtering and unscented transformation. The Monte Carlo simulation results show that this method outperforms the conventional tracking algorithm based on current statistical model.
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Cisar, P., e S. Maravic Cisar. "EWMA Statistic in Adaptive Threshold Algorithm". In Intelligent Engineering Systems, 2007 International Conference on. IEEE, 2007. http://dx.doi.org/10.1109/ines.2007.4283671.

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Shi, Justin, e Yasin Celik. "Single-Sided Statistic Multiplexed High Performance Computing". In 2016 Fourth International Workshop on Software Engineering for High Performance Computing in Computational Science and Engineering (SE-HPCCSE). IEEE, 2016. http://dx.doi.org/10.1109/se-hpccse.2016.009.

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Yang, Wen, Yali Zhao e Liang Ye. "Application of Spatial Statistic Analysis in Traffic Bottlenecks". In Second International Conference on Transportation Engineering. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41039(345)116.

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Liu, W. Y., I. E. Magnin e G. Gimenez. "A statistic based approach for segmentation". In 1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.5762102.

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Liu, Magnin e Gimenez. "A Statistic Based Approach For Segmentation". In Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE, 1992. http://dx.doi.org/10.1109/iembs.1992.590265.

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Jianhui, Lin. "An Urban Criminal Statistic Profile Vector Algorithm". In 2009 International Conference on Information Management, Innovation Management and Industrial Engineering. IEEE, 2009. http://dx.doi.org/10.1109/iciii.2009.548.

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Gandhi e Kassam. "An adaptive order statistic constant false alarm rate detector". In IEEE International Conference on Systems Engineering. IEEE, 1989. http://dx.doi.org/10.1109/icsyse.1989.48626.

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Gu, Ming. "The intrusion detection algorithm using statistic technology". In 2nd Annual International Conference on Electronics, Electrical Engineering and Information Science (EEEIS 2016). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/eeeis-16.2017.113.

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Li, Xinsheng, e Taiyong Li. "Real Aircraft Navigation Data Statistic and Rule Analysis". In 2010 International Conference on Computing, Control and Industrial Engineering. IEEE, 2010. http://dx.doi.org/10.1109/ccie.2010.97.

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Rapporti di organizzazioni sul tema "Statistic in engineering"

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HILLS, RICHARD G., e TIMOTHY G. TRUCANO. Statistical Validation of Engineering and Scientific Models with Application to CTH. Office of Scientific and Technical Information (OSTI), maggio 2001. http://dx.doi.org/10.2172/782589.

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HILLS, RICHARD G., e IAN H. LESLIE. Statistical Validation of Engineering and Scientific Models: Validation Experiments to Application. Office of Scientific and Technical Information (OSTI), marzo 2003. http://dx.doi.org/10.2172/809991.

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Dowding, Kevin J., e Richard Guy Hills. Statistical validation of engineering and scientific models : bounds, calibration, and extrapolation. Office of Scientific and Technical Information (OSTI), aprile 2005. http://dx.doi.org/10.2172/922760.

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Utley, Dawn R. A Research and Analysis of Technology Trends, Engineering Management, and Statistical Methods. Fort Belvoir, VA: Defense Technical Information Center, febbraio 2002. http://dx.doi.org/10.21236/ada399686.

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HILLS, RICHARD GUY, e TIMOTHY G. TRUCANO. Statistical Validation of Engineering and Scientific Models: A Maximum Likelihood Based Metric. Office of Scientific and Technical Information (OSTI), gennaio 2002. http://dx.doi.org/10.2172/791881.

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Singer, C., e D. Cox. Methods for testing transport models. [Departments of Nuclear Engineering and Statistics, Univ. of Illinois at Urbana[endash]Champaign]. Office of Scientific and Technical Information (OSTI), gennaio 1993. http://dx.doi.org/10.2172/6886000.

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Tucker-Blackmon, Angelicque. Engagement in Engineering Pathways “E-PATH” An Initiative to Retain Non-Traditional Students in Engineering Year Three Summative External Evaluation Report. Innovative Learning Center, LLC, luglio 2020. http://dx.doi.org/10.52012/tyob9090.

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The summative external evaluation report described the program's impact on faculty and students participating in recitation sessions and active teaching professional development sessions over two years. Student persistence and retention in engineering courses continue to be a challenge in undergraduate education, especially for students underrepresented in engineering disciplines. The program's goal was to use peer-facilitated instruction in core engineering courses known to have high attrition rates to retain underrepresented students, especially women, in engineering to diversify and broaden engineering participation. Knowledge generated around using peer-facilitated instruction at two-year colleges can improve underrepresented students' success and participation in engineering across a broad range of institutions. Students in the program participated in peer-facilitated recitation sessions linked to fundamental engineering courses, such as engineering analysis, statics, and dynamics. These courses have the highest failure rate among women and underrepresented minority students. As a mixed-methods evaluation study, student engagement was measured as students' comfort with asking questions, collaboration with peers, and applying mathematics concepts. SPSS was used to analyze pre-and post-surveys for statistical significance. Qualitative data were collected through classroom observations and focus group sessions with recitation leaders. Semi-structured interviews were conducted with faculty members and students to understand their experiences in the program. Findings revealed that women students had marginalization and intimidation perceptions primarily from courses with significantly more men than women. However, they shared numerous strategies that could support them towards success through the engineering pathway. Women and underrepresented students perceived that they did not have a network of peers and faculty as role models to identify within engineering disciplines. The recitation sessions had a positive social impact on Hispanic women. As opportunities to collaborate increased, Hispanic womens' social engagement was expected to increase. This social engagement level has already been predicted to increase women students' persistence and retention in engineering and result in them not leaving the engineering pathway. An analysis of quantitative survey data from students in the three engineering courses revealed a significant effect of race and ethnicity for comfort in asking questions in class, collaborating with peers outside the classroom, and applying mathematical concepts. Further examination of this effect for comfort with asking questions in class revealed that comfort asking questions was driven by one or two extreme post-test scores of Asian students. A follow-up ANOVA for this item revealed that Asian women reported feeling excluded in the classroom. However, it was difficult to determine whether these differences are stable given the small sample size for students identifying as Asian. Furthermore, gender differences were significant for comfort in communicating with professors and peers. Overall, women reported less comfort communicating with their professors than men. Results from student metrics will inform faculty professional development efforts to increase faculty support and maximize student engagement, persistence, and retention in engineering courses at community colleges. Summative results from this project could inform the national STEM community about recitation support to further improve undergraduate engineering learning and educational research.
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Khorsheed, Eman. My Engineering Students Neglect Their Statistics Course Homework: What Policies Should Introduce to Motivate Them to Do Their Home Work? Natural Sciences Publishing, luglio 2014. http://dx.doi.org/10.18576/ijlms/020203.

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Temple, Enoch C. The Enhancement of Overall Student Performance Through a Statistics Research Program for Students who are Recruited into Science, Engineering and Mathematics Programs. Fort Belvoir, VA: Defense Technical Information Center, novembre 2001. http://dx.doi.org/10.21236/ada397255.

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Temple, Enoch C., e Theresa McCants. The Enhancement of Overall Student Performance Through a Statistics Research Program for Students who are Recruited into Science, Engineering and Mathematics Programs. Fort Belvoir, VA: Defense Technical Information Center, maggio 2004. http://dx.doi.org/10.21236/ada426437.

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