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    Wyświetlanie 1-9 z 9
    Tytuł:
    Moving Average control charts for Burr X and Inverse Gaussian distributions
    Autorzy:
    Shafqat, Ambreen
    Aslam, Muhammad
    Albassam, Mohammed
    Powiązania:
    https://bibliotekanauki.pl/articles/1181944.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    control chart
    Burr X distribution
    inverse Gaussian distribution
    average run length
    Opis:
    The Burr X and inverse Gaussian (IG) distributions have been considered to design an attribute control chart for time truncated life test with the moving average (MA) scheme w. The presentation of the MA control chart has been estimated in terms of average run length (ARL) by using the Monte Carlo simulation. The ARL is determined for different values of sample sizes, MA statistics size, parameters’ values, and specified average run length. The performance of this new MA attribute control chart has been compared with the usual time truncated control chart for Burr X and IG distributions. The performance of a new control chart is better than that of the existing control chart.
    Źródło:
    Operations Research and Decisions; 2020, 30, 4; 81-94
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A study on exponentiated Gompertz distribution under Bayesian discipline using informative priors
    Autorzy:
    Aslam, Muhammad
    Afzaal, Mehreen
    Bhatti, M. Ishaq
    Powiązania:
    https://bibliotekanauki.pl/articles/1917073.pdf
    Data publikacji:
    2021-12-08
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    exponentiated Gompertz distribution
    loss functions
    informative priors
    Bayes estimators
    posterior risks
    Opis:
    The exponentiated Gompertz (EGZ) distribution has been recently used in almost all areas of human endeavours, starting from modelling lifetime data to cancer treatment. Various applications and properties of the EGZ distribution are provided by Anis and De (2020). This paper explores the important properties of the EGZ distribution under Bayesian discipline using two informative priors: the Gamma Prior (GP) and the Inverse Levy Prior (ILP). This is done in the framework of five selected loss functions. The findings show that the two best loss functions are the Weighted Balance Loss Function (WBLF) and the Quadratic Loss Function (QLF). The usefulness of the model is illustrated by the use of reallife data in relation to simulated data. The empirical results of the comparison are presented through a graphical illustration of the posterior distributions.
    Źródło:
    Statistics in Transition new series; 2021, 22, 4; 101-119
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of half-normal model using informative priors under Bayesian structure
    Autorzy:
    Khawar Kiani, Sania
    Aslam, Muhammad
    Bhatti, M. Ishaq
    Powiązania:
    https://bibliotekanauki.pl/articles/18105212.pdf
    Data publikacji:
    2023-09-08
    Wydawca:
    Główny Urząd Statystyczny
    Tematy:
    informative prior
    squared root inverted gamma distribution (SRIG)
    Bayesian hypothesis testing
    loss functions
    Opis:
    This paper considers properties of half-normal distribution using informative priors under the Bayesian criterion. It employs the squared root inverted gamma, Chi-square and Rayleigh distributions as the prior distribution to construct the Posterior distributions of the respective distributional parameters. Hyperparameters are elicited via prior predictive distribution. The properties of posterior distribution are studied, and their graphs are presented using a real data set. A comprehensive simulation scheme is conducted using informative priors. Bayes estimates are obtained using the loss functions (squared error loss function, modified loss function, quadratic loss function and Degroot loss function). Statistical inferences interval estimates and Bayesian hypothesis testing are presented to demonstrate the usefulness of the study.
    Źródło:
    Statistics in Transition new series; 2023, 24, 4; 19-36
    1234-7655
    Pojawia się w:
    Statistics in Transition new series
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Attribute np control charts using resampling systems for monitoring non-conforming items using exponentiated half logistic distribution
    Autorzy:
    Tanveer, Ammara
    Azam, Muhammad
    Aslam, Muhammad
    Shujaat Navaz, Muhammad
    Powiązania:
    https://bibliotekanauki.pl/articles/406284.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    attribute chart
    time truncation
    process
    statistical distributions
    sampling schemes
    Opis:
    An attribute np control chart has been designed using resampling systems for monitoring non- -conforming items under exponentiated half-logistic distribution. We suppose that lifetime follows exponentiated half-logistic distribution. For the proposed control charts, the optimal parameters and control limits have been obtained. The operational formulas for in-control and out of control average run lengths (ARLs) have been derived. Control constants are established by considering the target in-control ARL at a normal process. The extensive ARL tables are reported for various parameters and shifted values of process parameters. The performance of the proposed control chart is evaluated with several existing charts with regard to ARLs, which empower the presented chart and prove far better for timely detection of assignable causes. A wide range of tables, a real-life example, and simulation study for RGS and MDS are given for a better understanding of the problem.
    Źródło:
    Operations Research and Decisions; 2020, 30, 2; 115-143
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Image encryption based on Chebyshev chaotic map and S8 S-boxes
    Autorzy:
    Hussain, Iqtadar
    Anees, Amir
    Alkhaldi, Ali Hussain
    Aslam, Muhammad
    Siddiqui, Nasir
    Ahmed, Rehan
    Powiązania:
    https://bibliotekanauki.pl/articles/173918.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    image encryption
    chaos
    noise-resistant
    statistical analysis
    key sensitivity
    Opis:
    The encryption of image data is artful as compare to others due to some special characteristics such as entropy, contrast, the correlation between the pixels, intensity, and homogeneity. During encryption process, it is conventionally not easy to manage these characteristics with non-chaotic cryptosystems. Therefore for the sake of strong encryption algorithms, in last decades many cryptographers have presented invulnerable schemes for image encryption based on the chaotic maps. This manuscript aims to propose a strong encryption scheme based on a symmetric group of permutation advanced encryption standard (AES) substitution boxes and modified Chebyshev map. Principally, the secret key depends upon the parameters of Chebyshev map to create confusion in the main image and is encrypted by the scheme made from the S8 AES S-boxes and chaotic map. By this procedure, one can obtain an encrypted image that is entirely twisted. The results of analyses showed that the presented image encryption is strong and invulnerable.
    Źródło:
    Optica Applicata; 2019, 49, 2; 317-330
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Flood Frequency Analysis and Hydraulic Design of Bridge at Mashan on River Kunhar
    Autorzy:
    Riaz, Khuram
    Aslam, Hafiz Muhammad Shahzad
    Yaseen, Muhammad Waseem
    Ahmad, Hafiz Haseeb
    Khoshkonesh, Alireza
    Noshin, Sadaf
    Powiązania:
    https://bibliotekanauki.pl/articles/2097753.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
    Tematy:
    flooding
    river hydraulics
    return period
    HEC-RAS
    HEC-GEO-RAS
    ASTER DEM with 90 meters
    DEM
    Opis:
    Kunhar River hydrology and hydraulic design of a bridge on this river are being studied using HEC-Geo-RAS and Hydrologic Engineering Centers River Analysis System (HEC-RAS). The river flows in the northern part of Pakistan and is 170 km long. On both sides of the river, there are residential settlements. The river hydraulics is studied by using 30-metre remotely sensed shuttle radar topographic mission - digital elevation model (SRTM DEM) and Arc Map. 32 cross-sections are imported from Geographic Information System (GIS) to HEC-RAS. On historical peak flow results, the extreme value frequency distribution is applied, and a flood is determined for a 100-year return period, with a discharge estimated as 2223 cubic metres. Three steady flow profiles are adopted for HEC-RAS, the first is for the maximum historical peak data, the second is for the 100-year return period, and the third profile is for the latter 100-year period with a safety factor of 1.28. With remote sensing-based assessments, the proposed location for a bridge is determined and then verified with a field survey which was physically conducted. The maximum water height estimated in the river is about 4.26 m. This bridge will facilitate about 50 thousand population of Masahan and its surroundings. It will create a shortest link between Khyber Pakhtunkhwa and Azad Kashmir and thus will enhance tourism and trade activities.
    Źródło:
    Archives of Hydro-Engineering and Environmental Mechanics; 2022, 69, 1; 1-12
    1231-3726
    Pojawia się w:
    Archives of Hydro-Engineering and Environmental Mechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Utilization of textile denim sludge waste in high load-bearing structural applications
    Wykorzystanie odpadów szlamowych z dżinsu tekstylnego w zastosowaniach konstrukcyjnych o dużej nośności
    Autorzy:
    Beg, Tahreem
    Siddiqui, Muhammad Owais Raza
    Butto, Muhammad Aslam
    Iqbal, Kashif
    Sun, Danmei
    Powiązania:
    https://bibliotekanauki.pl/articles/2202619.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    textile composite
    textile effluent sludge
    concrete
    mortar
    kompozyt tekstylny
    tekstylny osad ściekowy
    beton
    zaprawa
    Opis:
    The paper presents the results of research on the utilization of textile denim sludge waste, which was used to obtain concrete and mortar. For this purpose, cement and sand were replaced with the powdered sludge in the amount of 5 and 10 wt. The sludge was initially analyzed by FTIR and XRD to identify functional groups and chemical composition, respectively. Replacing sand with sludge resulted in a significant reduction in the concrete compressive and flexural strength (> 50%). Significantly better results were obtained by replacing cement with 5 wt% of sludge. In this case, the concrete compressive strength decreased by only 14%, and the flexural strength by 15%.
    W pracy przedstawiono wyniki badań dotyczące utylizacji odpadów szlamowych z dżinsu tekstylnego, których użyto do otrzymywania betonu i zaprawy murarskiej. W tym celu cement i piasek zastąpiono sproszkowanym szlamem w ilości odpowiednio 5 i 15% mas. Osad poddano wstępnej analizie za pomocą FTIR i XRD w celu zidentyfikowania odpowiednio grup funkcyjnych i składu chemicznego osadu. Zastąpienie piasku szlamem spowodowało znaczne zmniejszenie wytrzymałości betonu na ściskanie i zginanie (> 50%). Znacznie lepsze wyniki uzyskano zastepując cement szlamem. W tym przypadku wytrzymałość betonu na ściskanie zmniejszyła się tylko o 14%, a wytrzymałość na zginanie o 15%.
    Źródło:
    Polimery; 2022, 67, 7-8; 298--307
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of basalt knitted fabric on the properties of green epoxy resin
    Wpływ tkaniny bazaltowej na właściwości „zielonej” żywicy epoksydowej
    Autorzy:
    Jamshaid, Hafsa
    Rajput, Abdul Waqar
    Zahid, Bilal
    Memon, Sanam
    Qureshi, Raja Fahad
    Aslam, Sarmad
    Nadeem, Muhammad
    Powiązania:
    https://bibliotekanauki.pl/articles/2088265.pdf
    Data publikacji:
    2022
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    green composites
    tensile properties
    impact strength
    „zielone” kompozyty
    właściwości mechaniczne przy rozciąganiu
    udarność
    Opis:
    The influence of basalt fabric on the tensile mechanical properties and the impact resistance of green epoxy resin was investigated. Composites with parallel arrangement of insert yarns had better properties than in the case of their perpendicular arrangement. The properties were also influenced by the number of layers of the fabric. The tensile strength and impact resistance of the composites were better than the commercially available side mirror covers due to the superior properties of the basalt fiber.
    Zbadano wpływ tkaniny bazaltowej na właściwości mechaniczne przy rozciąganiu i odporność na uderzenie „zielonej” żywicy epoksydowej. Kompozyty o równoległym ułożeniu przędzy charakteryzowały się lepszymi właściwościami niż te o prostopadłym ułożeniu. Na właściwości miała również wpływ liczba warstw tkaniny. Wytrzymałość na rozciąganie i odporność na uderzenie kompozytów były lepsze niż dostępnych na rynku osłon lusterek bocznych ze względu na dobre właściwości włókna bazaltowego.
    Źródło:
    Polimery; 2022, 67, 2; 67--71
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prospective study on safety climate of surface mining in Pakistan
    Autorzy:
    Jiskani, Izhar Mithal
    Chalgri, Saleem Raza
    Memon, Safiullah
    Shahani, Niaz Muhammad
    Qureshi, Abdullah Rasheed
    Jarwar, Zuhaib Aslam
    Powiązania:
    https://bibliotekanauki.pl/articles/1839044.pdf
    Data publikacji:
    2020
    Wydawca:
    Główny Instytut Górnictwa
    Tematy:
    safety climate
    occupational hazards
    mine workers
    surface mining
    mine
    health and safety
    klimat bezpieczeństwa
    zagrożenia zawodowe
    górnicy
    górnictwo odkrywkowe
    kopalnia
    bhp
    Opis:
    The purpose of this study was to assess miners’ perceptions about the safety climate of their workplace. To achieve the research aim, the relationship between demographic characteristics and occupational hazards was first determined, and finally, the relationship of safety climate with occupational hazards and health-seeking behavior was discovered. The data was collected through a self-reporting questionnaire. The results revealed that the subjects have to deal with severe occupational hazards, and they possess poor health-seeking behavior. A safety climate assessment showed that only one of the seven dimensions (i.e. safety communication, learning, and trust in co-worker safety competence) was at a satisfactory level. With respect to the first objective, we found that age, education, and experience were statistically significant with occupational hazards, while marital status had no significant impact on occupational hazards. Regarding the second objective, three dimensions (management safety justice, safety communication, learning, and trust in co-worker safety competence, and workers’ trust in the efficacy of safety systems) were significant predictors of occupational hazards. The study reflects that workers’ participation is the main factor in setting up an adequate safety climate within the organization. Suggestions provided in this study could provide useful information to managers and safety practitioners to improve safety performance and promote the safety climate in the organization.
    Źródło:
    Journal of Sustainable Mining; 2020, 19, 1; 11-18
    2300-1364
    2300-3960
    Pojawia się w:
    Journal of Sustainable Mining
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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