scholarly journals Determination of pedestrian displacement velocity for ground exploration programs

2017 ◽  
Vol 37 (2) ◽  
pp. 34-41
Author(s):  
Luis Hernán Ochoa Gutierrez ◽  
Orlando Hernandez Pardo ◽  
Luis Joel Martinez Martinez
Keyword(s):  
Cost Estimation ◽  
Physical Meaning ◽  
Real Data ◽  
Velocity Estimation ◽  
Displacement Velocity ◽  
Clear Physical Meaning ◽  
Proposed Model ◽  
Sampling Points ◽  
Selection Of

In Engineering and Geophysics field exploration, uncertainty for determination of the velocity of ground data acquisition due to extreme topographic conditions has been underestimated in the calculation of the displacement time between stations or sampling points. This lack of reliable models, negatively affects the determination of costs and planning of fieldwork activities. Known models of times and routes of displacement determination such as the “Smaller Cost Routes” are based on the effect of the type of land and the slope. However, these models consider the effect of the slope by means of subjective impedance values which has no a clear physical meaning. Furthermore, the upslope or downslope displacement is not considered to affect the reliability of velocity estimation. In this paper, a model of displacement velocity is proposed taking into account the upslope/downslope factor. The model was determined using real data from a topographical survey along a pipeline of 880 Km extended along terrains with changing climatic and topographic conditions. As a result, the proposed model improves the selection of optimal routes for a reliable time and cost estimation.

A Hybrid AHP-ELECTRE I Multicriteria Model for Performance Assessment and Team Selection

2017 ◽  
pp. 115-127
Author(s):  
Ikram Khatrouch ◽  
Lyes Kermad ◽  
Abderrahman el Mhamedi ◽  
Younes Boujelbene
Keyword(s):  
Human Resources ◽  
Decision Maker ◽  
Human Resources Management ◽  
Real Data ◽  
Assessment Model ◽  
Team Selection ◽  
Proposed Model ◽  
Electre I ◽  
Multicriteria Model ◽  
Selection Of

Human resources management is essential to any health care system. This paper proposes an assessment model to help the decision maker in the selection of an optimal team. In the proposed model, AHP method is applied to identify the weights of each criterion in the decision model. ELECTRE I method is used to obtain the best team that satisfies most of the decision maker preferences. We test the effectiveness of the model on the real data collected from the ‘Habib Bourguiba' Hospital in Tunisia.

ANALYSIS OF THE DIVERSIFIED AND THE HIGHLY SPECIALIZED ENTERPRISES’ FINANCIAL STABILITY

2020 ◽  
Vol 10 (6) ◽  
pp. 1097-1105
Author(s):  
O.V. Karpets ◽  
◽  
A.A. Andreev ◽  
Keyword(s):  
Financial Stability ◽  
Research Question ◽  
Real Data ◽  
Development Strategies ◽  
Diversification Strategy ◽  
Doing Business ◽  
Future Strategy ◽  
Set Up ◽  
Selection Of

Today it is getting harder for companies all over the world to stay in the market, as doing business is associated with great risks. It is especially true for the young enterprises that have just set up or are at this stage. When a certain group of persons made a decision to begin and run a business, then one of the main questions that, as a rule, should arise first of all for them - what the company will do and according to what strategy it will carry out its main activities. It is easy to guess that the question of the future strategy of the enterprise is much more complicated for both new companies and existing ones, even though today there are many different development strategies for practically any enterprise, regardless of the size of its charter capital, scope of activity and other important factors. There are a great many development strategies, but most general are two - diversification and specialization. One strategy involves the concentration of production and the sale of one type of goods, while the other strategy is its absolute opposite, which involves the creation of several lines of goods that are in no way connected with each other, and the sale of these goods to different sales markets. The purpose of this article is to determine, basing on real data, which of the two strategies is most effective. Research objectives: determination of criteria for the selection of the necessary enterprises; compiling a list of enterprises and indicators of financial stability; analysis of the results obtained and the answer to the research question. After completing all the tasks and objectives of the study, it was concluded that those enterprises that use a diversification strategy are in a more stable financial position than enterprises that use a specialization strategy.

scholarly journals CONTRACTOR SELECTION OF CONSTRUCTION IN A COMPETITIVE ENVIRONMENT

2008 ◽  
Vol 9 (3) ◽  
pp. 181-187 ◽  
Author(s):  
Edmundas Kazimieras Zavadskas ◽  
Zenonas Turskis ◽  
Jolanta Tamošaitienė
Keyword(s):  
Optimality Criterion ◽  
Construction Operations ◽  
Contractor Selection ◽  
Data Analyses ◽  
Proposed Model ◽  
Attribute Evaluation ◽  
Construction Efficiency ◽  
Management Cycle ◽  
Selection Of

Contractor selection is a vital part of the project management cycle and deals with risk and risk management. This paper presents contractors’ assessment and selection based on the multi‐attribute methods in a competitive and risky environment. The model is based on a multi‐attribute evaluation of contractors, the determination of their optimality criterion values according to Hodges‐Lehmann rule. The proposed model could be applied to assessment of construction operations. The attributes of contractor evaluation are selected taking into consideration the interests and goals of the stakeholders as well as factors that influence the process of construction efficiency. The model is based on metric scores. A background and a description of the proposed model are provided and a few key findings from the data analyses are presented.

scholarly journals Dimensional characterization of heat flux in aquifers with horizontal water flow. Velocity estimation from temperature-depth profiles

2021 ◽  
Author(s):  
José Antonio Valera ◽  
Francisco Alhama
Keyword(s):  
Flow Velocity ◽  
Water Flow ◽  
Transfer Problem ◽  
Direct Determination ◽  
Velocity Estimation ◽  
Water Flow Velocity ◽  
Dimensionless Groups ◽  
Selection Of

From the dimensionless governing equations obtained through an adequate selection of dependent and independent dimensionless variables, and the use of spatial discrimination, the dimensionless groups that govern the solution patterns of the heat transfer problem in aquifers with horizontal flow velocity are determined. As a boundary condition on the surface, the cases of constant and harmonic temperature are studied. The emergence of a characteristic length that, in its dimensionless form, depends on the deduced groups, allows the direct determination of the water flow from experimental measurements of the temperature profiles in the classical form of the inverse problem.

THE DEVELOPMENT OF THE MATHEMATICAL MODEL OF PREDICTING THE INDICATORS OF ACCREDITATION OF TECHNICAL UNIVERSITIES IN THE RUSSIAN FEDERATION

2017 ◽  
pp. 27-38
Author(s):  
Olga Mikhaylovna Tikhonova ◽  
Alexander Fedorovich Rezchikov ◽  
Vladimir Andreevich Ivashchenko ◽  
Vadim Alekseevich Kushnikov
Keyword(s):  
Mathematical Model ◽  
System Dynamics ◽  
Regression Model ◽  
Oriented Graph ◽  
Real Data ◽  
Educational Process ◽  
Proposed Model ◽  
Linear Differential ◽  
The University ◽  
The Mathematical Model

The paper presents the system of predicting the indicators of accreditation of technical universities based on J. Forrester mechanism of system dynamics. According to analysis of cause-and-effect relationships between selected variables of the system (indicators of accreditation of the university) there was built the oriented graph. The complex of mathematical models developed to control the quality of training engineers in Russian higher educational institutions is based on this graph. The article presents an algorithm for constructing a model using one of the simulated variables as an example. The model is a system of non-linear differential equations, the modelling characteristics of the educational process being determined according to the solution of this system. The proposed algorithm for calculating these indicators is based on the system dynamics model and the regression model. The mathematical model is constructed on the basis of the model of system dynamics, which is further tested for compliance with real data using the regression model. The regression model is built on the available statistical data accumulated during the period of the university's work. The proposed approach is aimed at solving complex problems of managing the educational process in universities. The structure of the proposed model repeats the structure of cause-effect relationships in the system, and also provides the person responsible for managing quality control with the ability to quickly and adequately assess the performance of the system.

DETERMINING THE DESALINATION UNIT COMPOSITION FOR COSTAL AREAS AND SMALL ISLANDS USE ANALYTIC HIERARCHY PROCESS

2017 ◽  
Vol 9 (1) ◽  
Author(s):  
Imam Setiadi ◽  
Dinda Rita K. Hartaja
Keyword(s):  
Analytic Hierarchy Process ◽  
Energy Demand ◽  
Pairwise Comparison ◽  
Small Islands ◽  
Ahp Method ◽  
Analytic Hierarchy ◽  
Comparison Research ◽  
Hierarchy Process ◽  
Selection Of

Selection of the appropriate composition desalination units can be done with a variety of method approaches, one of the method is the Analytic Hierarchy Process. In determining the desalination unit with AHP method to consider is setting a goal, an alternative criteria and pairwise comparison. Research for the determination of the exact composition of the desalination unit in order to achieve sustainable drinking water suppy in coastal areas and small islands has been conducted. The results of the study are as follows, the energy demand of 50.83%, operator costs of 26.64%, maintenance costs of 14.13% and chemical requirement 8.4%. For an alternative composition desalination unit of RO 10 m3 / day is the best alternative composition with value of 59.61%, the composition of the next alternative is RO 20 m3/ day of 30.40% and the last alternative of the desalination unit composition is RO 120 m3/ day of 09.99%.Key words : Desalination, Mukti Stage Flash Composition, AHP

Sign in / Sign up

Export Citation Format

Share Document