A probabilistic model for the vulnerability of metal plates under the impact of cylindrical projectiles

2007 ◽  
Vol 20 (2) ◽  
pp. 128-134 ◽  
Author(s):  
A. Mebarki ◽  
Q.B. Nguyen ◽  
F. Mercier ◽  
R. Ami Saada ◽  
F. Meftah ◽  
...  
Keyword(s):  
Probabilistic Model ◽  
Metal Plates ◽  
The Impact

scholarly journals ARTISTIC METAL PROCESSING IN THE MOLDOVAN SSR AND THE REPUBLIC OF MOLDOVA: FORGOTTEN OR LESS KNOWN NAMES

Akademos ◽  
2021 ◽  
Vol 60 (1) ◽  
pp. 146-152
Author(s):  
Liliana Condraticova ◽  
Keyword(s):  
Noble Metals ◽  
Relevant Information ◽  
Folk Tales ◽  
Republic Of Moldova ◽  
Decorative Art ◽  
Metal Plates ◽  
Archival Documents ◽  
Metal Processing ◽  
The Republic ◽  
The Impact

The main purpose of our approach is to analyze the activity of craftsmen (artisans) in the field of artistic metal processing in the second half of the twentieth century – the beginning of the twenty-first century. The work of the artists includes various decorative boards representing village life, heroes of folk tales and agricultural work, emphasizing the impact of folk art on the subjects approached by decorative craftsmen. Jewelry, being a relatively apolitical field, is represented by necklaces with pendants, earrings, brooches, rings, all made of noble metals and fine, ornamental pebbles. Based on archival documents, exhibition catalogs and interviews with artists who used to make jewelry and various metal plates, was presented relevant information regarding the activity of craftsmen whose names were recently revealed (Alexei Marco, Gheorghe Cojusnean, Vladimir Calasnicov, Vladimir Vasilkov etc.). Also, in the scientific circuit were introduced new, forgotten or less known names: Vasili Sochin, Iuri Terehov, Natalia Vavilina and others. The evocation of their creation comes to complete the general picture of the evolution of decorative art, implicitly of the artistic processing of metals from the Moldovan SSR and the Republic of Moldova.

scholarly journals Structural Integrity Evaluation of Jackets Submitted to Through Cracks

2002 ◽  
Author(s):  
Antoine Rouhan ◽  
Franck Schoefs
Keyword(s):  
Finite Element ◽  
Probabilistic Model ◽  
Structural Integrity ◽  
Detection Theory ◽  
False Alarms ◽  
Structural Behaviour ◽  
Maintenance Costs ◽  
The Impact

The study of the impact of through cracks on structural integrity of jacket platforms still a challenge. The detection of such cracks is of great importance and a miss, or a spurious indication can lead to maintenance costs overrun. In the context of risk-based inspection and monitoring of such structures, a global methodology is proposed. The detection of large cracks is first addressed. A probabilistic model is proposed, taking into account the in situ inspections performances and the probability of crack presence. This is achieved by the use of the detection theory. Second, a finite element that is able to represent the structural behaviour of through cracked tubular nodes is proposed and a global structural integrity measure is suggested. Finally, inspection results are introduced in order to compute the expected platform structural integrity. It is illustrated by considering FMD inspections results of a tripod structure. Effects of false alarms can then be underlined.

scholarly journals A Railway Scheduling Method using Probabilistic Model Checking

2019 ◽  
Vol 9 (1) ◽  
pp. 6694-6698
Keyword(s):  
Model Checking ◽  
Probabilistic Model ◽  
Probabilistic Model Checking ◽  
Railway Transportation ◽  
Railway Network ◽  
Double Line ◽  
Arrival Times ◽  
Scheduling Method ◽  
Prism Model ◽  
The Impact

Trains scheduling is an important problem in railway transportation. Many companies use fixed train timetabling to handle this problem. Train delays can affect the pre-defined timetables and postpone destination arrival times. Besides, delay propagation may affect other trains and degrade the performance of a railway network. An optimal timetable minimizes the total propagated delays in a network. In this paper, we propose a new approach to compute the expected propagated delays in a railway network. As the main contribution of the work, we use Discrete-time Markov chains to model a railway network with a fixed timetable and use probabilistic model checking to approximate the expected delays and the probability of reaching destinations with a desired delay. We use PRISM model checker to apply our approach for analyzing the impact of different train scheduling in double line tracks.

scholarly journals The Effect of Adhesive Additives on Silica Gel Water Sorption Properties

Entropy ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 327
Author(s):  
Karol Sztekler ◽  
Wojciech Kalawa ◽  
Agata Mlonka-Medrala ◽  
Wojciech Nowak ◽  
Łukasz Mika ◽  
...  
Keyword(s):  
Sorption Capacity ◽  
Silica Gel ◽  
Water Sorption ◽  
High Reliability ◽  
Electricity Consumption ◽  
Hydroxyethyl Cellulose ◽  
Poly Vinyl Alcohol ◽  
Dynamic Adsorption ◽  
Metal Plates ◽  
The Impact

Adsorption chillers are characterized by low electricity consumption, lack of moving parts, and high reliability. The disadvantage of these chillers is their large weight due to low adsorbent sorption capacity. Therefore, the attention is turned to finding a sorbent with a high water sorption capacity and enhanced thermal conductivity to increase chiller efficiency. The article discusses the impact of selected adhesives used for the production of an adsorption bed in order to improve heat exchange on its surface. Experiments with silica gel with three commercial types of glue on metal plates representing heat exchanger were performed. The structure of samples was observed under a microscope to determine the coverage of adsorbent by glue. To determine the kinetics of the free adsorption, the amounts of moisture adsorbed and the desorption dynamics the prepared samples of coated bed on metal plates were moisturized and dried in a moisture analyzer. Samples made of silica gel mixed with the adhesive 2-hydroxyethyl cellulose, show high adsorption capacity, low dynamic adsorption, and medium dynamic desorption. Samples containing adhesive poly(vinyl alcohol) adsorb less moisture, but free adsorption and desorption were more dynamic. Samples containing the adhesive hydroxyethyl cellulose show lower moisture capacity, relatively dynamic adsorption, and lower dynamic desorption.

scholarly journals Multivariate regression analysis in the probability of deaths in COVID-19 cases: a case study in the State of Pará, Amazon region, Brazil

2020 ◽  
Vol 9 (11) ◽  
pp. e71291110299
Author(s):  
Cássio Pinho dos Reis ◽  
Herson Oliveira da Rocha ◽  
Nayara de Araújo Muzili Reis ◽  
Sávio Pinho dos Reis ◽  
Gustavo Nogueira Dias ◽  
...  
Keyword(s):  
Probabilistic Model ◽  
Odds Ratio ◽  
Multivariate Regression Analysis ◽  
The State ◽  
Metropolitan Region ◽  
Great Effort ◽  
Infected People ◽  
And Gender ◽  
The Impact

Since the first detected cases of COVID-19 in Brazil, researchers have made a great effort to try to understand the disease. Understanding the impact of the disease on people can be instrumental in identifying which groups can be considered at risk. Therefore, this study researches a probabilistic model based on a statistical model of non-linear regression analyzing the following variables: age, if you are a health professional, if you are resident in the Metropolitan Region of Belém (RMB), State of Pará and gender with the objective of identifying those people who have a greater impact on the number of people infected and killed by COVID-19, that is, people who are more likely to die. To carry out the research, we used the data of all infected people by COVID-19 in the State of Pará until July 2020. It can be verified according to the proposal of the probabilistic model that elderly people, with a odds ratio of 1.69 (95% CI 1.52-1.88), residents of Metropolitan Region of Belém, with an odds ratio of 2.14 (95% CI 2.02 - 2.27) and men, with an odds ratio of 1.83 (95% CI 1.73 - 1.95) are groups of people with a higher risk of dying from diseases, while health professionals, with a 0.36 chance ratio (CI9 5% 0.29 - 0.45), are less likely to die.

The Impact of the Mode of Data Representation for the Result Quality of the Detection and Filtering of Spam

2017 ◽  
pp. 150-168
Author(s):  
Reda Mohamed Hamou ◽  
Abdelmalek Amine ◽  
Moulay Tahar
Keyword(s):  
Unsupervised Learning ◽  
Probabilistic Model ◽  
Hybrid Algorithm ◽  
Data Representation ◽  
The Internet ◽  
The Matrix ◽  
N Gram ◽  
Sensitive Parameters ◽  
The Impact

Spam is now of phenomenal proportions since it represents a high percentage of total emails exchanged on the Internet. In the fight against spam, we are using this article to develop a hybrid algorithm based primarily on the probabilistic model in this case, Naïve Bayes, for weighting the terms of the matrix term -category and second place used an algorithm of unsupervised learning (K-means) to filter two classes, namely spam and ham (legitimate email). To determine the sensitive parameters that make up the classifications we are interested in studying the content of the messages by using a representation of messages using the n-gram words and characters independent of languages (because a message may be received in any language) to later decide what representation to use to get a good classification. We have chosen several metrics as evaluation to validate our results.

SPH Analysis on Formation Manner of Wavy Joint Interface in Impact Welded Al/Cu Dissimilar Metal Plates

2014 ◽  
Vol 794-796 ◽  
pp. 383-388 ◽  
Author(s):  
Junto Nishiwaki ◽  
Yuya Sawa ◽  
Yohei Harada ◽  
Shinji Kumai
Keyword(s):  
Metal Plate ◽  
Wave Form ◽  
Joint Interface ◽  
Interface Formation ◽  
Direction Parallel ◽  
Dissimilar Metal ◽  
Metal Plates ◽  
Wavy Interface ◽  
The Impact ◽  
Metal Jet

The impact welding was performed for several kinds of metal plate couples. The joint interface exhibited a sinusoidal wave form when two metal plates with the same or similar density (e.g.Al/Al, Cu/Cu and Cu/Ni) were impact-welded by high-speed oblique collision. In contrast, as for dissimilar metal plate couples with large density difference such as Al/Cu, an asymmetric wavy interface was obtained. In order to make clear the reason for morphological difference, a computer simulation of the collision behavior was performed using SPH (Smooth Particle Hydrostatic) method. The simulation results revealed that the wave form was controlled by the interaction between the emitted metal jet and metal plate surfaces ahead of the collision point. For Al/Al and Cu/Ni, the emitted metal jet hit each surface alternatively and this resulted in symmetrical wavy interface formation. While, for Al/Cu, the metal jet was emitted to the direction parallel to the Cu plate, and the interaction took place between the metal jet and the Cu plate surface. The metal jet emission and wavy interface formation mechanism were also investigated.

A probabilistic model of the impact of cultural participation on social capital

2020 ◽  
pp. 1-14 ◽  
Author(s):  
Leonidas Sakalauskas ◽  
Vytautas Dulskis ◽  
Rimvydas Lauzikas ◽  
Arunas Miliauskas ◽  
Darius Plikynas
Keyword(s):  
Social Capital ◽  
Probabilistic Model ◽  
Cultural Participation ◽  
The Impact

scholarly journals Rayleigh–Taylor turbulent mixing evolution under a shock influence

2000 ◽  
Vol 18 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Yu.A. KUCHERENKO ◽  
A.P. PYLAEV ◽  
V.D. MURZAKOV ◽  
V.N. POPOV ◽  
V.E. SAVEL'EV ◽  
...  
Keyword(s):  
Experimental Study ◽  
Solid Surface ◽  
Turbulent Mixing ◽  
Initial Perturbation ◽  
Density Ratio ◽  
Internal Working ◽  
Metal Plates ◽  
Impulse Duration ◽  
Rayleigh Taylor Instability ◽  
The Impact

At the installation SOM, the experimental study of the impulse acceleration influence on the behavior of the turbulized layer obtained as a result of Rayleigh–Taylor instability (RTI) action on the system of two different density liquids with the density ratio n = 3, has been performed. After application of impulse acceleration the systems were moving according to inertia, and by using the light method the coordinates of penetration of the heavier liquid into the lighter one and vice versa were determined. The liquids studied were placed inside the ampoule that had internal working sizes (54 × 64 × 120) mm3. There were initial accidental perturbations like a rough solid surface at the interface and the width of the initial perturbation zone was L0 = 2.3 mm. The moving ampoule blow against metal plates created the impulse acceleration. The relative impulse acceleration was δg/g11 = 22.2–66.6 where g11 is the ampoule acceleration before the impact, the impulse duration was varied from 0.27 ms to 0.096 ms. The results concerned with the turbulized layer extension after the impulse acceleration action were obtained.

scholarly journals Real vs. nominal cycles: a multistate Markov-switching bi-factor approach

2014 ◽  
Vol 18 (5) ◽  
Author(s):  
Danilo Leiva-Leon
Keyword(s):  
Business Cycle ◽  
Great Recession ◽  
Probabilistic Model ◽  
Housing Demand ◽  
Real Activity ◽  
The Great Recession ◽  
Supply Shocks ◽  
The Business Cycle ◽  
The Impact ◽  
Simultaneous Inferences

AbstractThis paper proposes a probabilistic model based on comovements and nonlinearities useful to assess the type of shock affecting each phase of the business cycle. By providing simultaneous inferences on the phases of real activity and inflation cycles, contractionary episodes are dated and categorized into demand, supply and mix recessions. The impact of shocks originated in the housing market over the business cycle is also assessed, finding that recessions are usually accompanied by housing deflationary pressures, while expansions are mainly influenced by housing demand shocks, with the only exception occurred during the period surrounding the “Great Recession,” affected by expansionary housing supply shocks.

Sign in / Sign up

Export Citation Format

Share Document