Probabilistic approach to determination of the dimensions of gravitational settling basins

2009 ◽  
Vol 43 (4) ◽  
pp. 207-217
Author(s):  
I. E. Mikhailov
Keyword(s):  
Probabilistic Approach ◽  
Gravitational Settling

scholarly journals Modeling of Oxygen-Neon Dominated Accretion Disks in Ultracompact X-Ray Binaries: 4U 1626-67

2004 ◽  
Vol 194 ◽  
pp. 146-147 ◽  
Author(s):  
K. Werner ◽  
T. Nagel ◽  
S. Dreizler ◽  
T. Rauch
Keyword(s):  
Accretion Disks ◽  
Important Process ◽  
Gravitational Settling ◽  
X Ray ◽  
The Core ◽  
Synthetic Spectra ◽  
First Results ◽  
Low Mass ◽  
X Ray Binaries

AbstractWe report on first results of computing synthetic spectra from H/He-poor accretion disks in ultracompact LMXBs. We aim at the determination of the chemical composition of the very low-mass donor star, which is the core of a former C/O white dwarf. The abundance analysis allows to draw conclusions on gravitational settling in WDs which is an important process affecting cooling times and pulsational g-mode periods.

scholarly journals An efficient mechanical-probabilistic approach for the collapse modelling of RC structures

2019 ◽  
Vol 12 (2) ◽  
pp. 386-397
Author(s):  
K. O. COELHO ◽  
E. D. LEONEL ◽  
J. FLÓREZ-LÓPEZ
Keyword(s):  
Probabilistic Approach ◽  
Damage Model ◽  
Coupled Model ◽  
Simulation Method ◽  
Computationally Efficient ◽  
Rc Structures ◽  
Realistic Representation ◽  
Probabilistic Context ◽  
Numerical Approaches

Abstract The reinforced concrete (RC) structures are widely utilized around the world. However, the modelling of its complex mechanical behaviour by efficient numerical approaches has been presented marginally in the literature. The efficient approaches enable the accurate and the realistic representation of the mechanical phenomena involved and are computationally efficient for analysing complex structures. In the present study, the improved version of the lumped damage model is coupled to the Monte Carlo simulation method to represent the mechanical-probabilistic behaviour of RC structures. In such model, the concrete cracking and reinforcements’ yield are represented accurately. Moreover, this damage approach enables the accurate modelling of failure scenarios, which are based on the damage variable. Furthermore, this coupled model enables the determination of the collapse modelling accounting for uncertainties, which is the main contribution of the present study. One simple supported RC beam and one 2D RC frame are analysed in the probabilistic context. The accurate results are obtained for the probabilistic collapse path as well as its changes as a function of the loading conditions and material properties uncertainties.

Direct phase determination of triple products from Bijvoet inequalities. II. A probabilistic approach

1978 ◽  
Vol 34 (3) ◽  
pp. 447-450 ◽  
Author(s):  
J. J. L. Heinerman ◽  
H. Krabbendam ◽  
J. Kroon ◽  
A. L. Spek
Keyword(s):  
Probabilistic Approach ◽  
Phase Determination

scholarly journals The Evaluation Of Algorithms For Determination Of The Reliability Index

2015 ◽  
Vol 61 (3) ◽  
pp. 133-147 ◽  
Author(s):  
A. Dudzik ◽  
U. Radoń
Keyword(s):  
Reliability Index ◽  
Limit State ◽  
Probabilistic Approach ◽  
Random Variables ◽  
Numerical Procedure ◽  
Vertical Displacement ◽  
Design Parameters ◽  
State Function ◽  
Structural Failure

AbstractThe study deals with stability and dynamic problems in bar structures using a probabilistic approach. Structural design parameters are defined as deterministic values and also as random variables, which are not correlated. The criterion of structural failure is expressed by the condition of non-exceeding the admissible load multiplier and condition of non-exceeding the admissible vertical displacement. The Hasofer-Lind index was used as a reliability measure. The primary research tool is the FORM method. In order to verify the correctness of the calculations Monte Carlo and Importance Sampling methods were used. The sensitivity of the reliability index to the random variables was defined. The limit state function is not an explicit function of random variables. This dependence was determined using a numerical procedure, e.g. the finite element methods. The paper aims to present the communication between the STAND reliability analysis program and the KRATA and MES3D external FE programs.

scholarly journals The Consolidated Mathews Stability Graph for Open Stope Design

2021 ◽  
Author(s):  
Ali Mortazavi ◽  
Bakytzhan Osserbay
Keyword(s):  
Probabilistic Approach ◽  
Primary Objective ◽  
Stability Number ◽  
Stability Chart ◽  
The Stability ◽  
Extended Graph ◽  
Stability Graph ◽  
Stope Design

Abstract The stability graph method of stope design is one of the most widely used methods of stability assessments of stopes in underground polymetallic mines. The primary objective of this work is to introduce a new stability chart, which includes all relevant case histories, and to exclude parameters with uncertainties in the determination of stability number. The modified stability number was used to achieve this goal, and the Extended Mathews database was recalculated and compared with the new stability graph. In this study, a new refined Consolidated stability graph was developed by excluding the entry mining methods data from the Extended graph data, and only the non-entry methods data was used. The applicability of the proposed Consolidated stability chart was demonstrated by an open stope example. The stability for each stope surface was evaluated by a probabilistic approach employing a logistic regression model and the developed Consolidated stability chart. Comparing the stability analysis results with that of other published works of the same example shows that the determined Consolidated chart, in which the entry-method data is excluded, produces a more conservative and safer design. In conclusion, the size and quality of the dataset dictate the reliability of this approach.

scholarly journals Probabilistic approach to near acceptance of expert decisions on examinations of difficult objects

2019 ◽  
Vol 64 (3) ◽  
pp. 359-365
Author(s):  
O. V. Rybalskiy ◽  
V. I. Solovyov ◽  
S. S. Chernyavskiy ◽  
V. V. Zhuravel ◽  
V. K. Zheleznyak
Keyword(s):  
Information Technologies ◽  
Probabilistic Approach ◽  
Probabilistic Character

The aim of the article is to ground the probabilistic approach to the acceptance of expert decisions on examinations of difficult objects with the use of the information technologies conducted on the basis of the used methodologies of realization of examinations. Criminalistics identification researches of difficult objects are conducted by comparison of the identification signs got from debatable (investigated) and exemplary (experimental) identifying objects. For comparison at first it is necessary to measure them, and already after it to compare inter se, i.e. to find the measure of closeness between the compared identification signs. And here are two aspects of estimation of authenticity of results of comparison. First from them belongs to determination of probability of complete coincidence of parameters of identification signs of two different objects. In other words, it is the aspect of proof of strict individuality of descriptions of the investigated objects, confessed in the whole world and allowing to use the categorical form of formulation of conclusion of expert. The calculation of probability of coincidence of fingerprint cards of two different personalities belongs exactly to this aspect. The second aspect is related to probabilistic character of processes of both origin of identification signs in difficult objects and their selection, measuring and comparison during realization of criminalistics researches. Exactly he is related to the probabilistic going near the estimation of results of criminalistics researches of difficult objects. It is shown that the result of any examination of difficult object, related to measuring of concrete sizes, is characterized by the presence of random constituent and its result must be presented in a probabilistic form. There are three separate random values determined by probability, characterizing examination and tool intended for identification researches of difficult objects At creation of tool for realization of examinations of difficult objects and its introduction into practice, the curves of values of probability errors of І and ІІ family must be made and its minimum efficiency must be determined. Exactl efficiency of tool must serve as a criterion for its suitability for realization of expert researches.

Sign in / Sign up

Export Citation Format

Share Document