scholarly journals Aplicación del método de iluminación por campo de onda en un modelo subthrust en la Cuenca del Valle Superior del Magdalena (Colombia)

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Patricia Chajín ◽  
Germán Camacho ◽  
Edwar Herrera
Keyword(s):  
Complex Structures ◽  
Seismic Line ◽  
Fast Evaluation ◽  
Exploration Process ◽  
Geological Interpretation ◽  
Geophysical Modeling ◽  
Geological Models ◽  
Illumination Method ◽  
Definition Of ◽  
Seismic Images

Complex structures like subthrust show high risk during the definition of structural traps in low quality seismic images in depth, so we can use the structural interpretation to simulate the subthrust illumination by wavefield of a prospect area in order to reduce the uncertainty and support the oil exploration process. In general, we performed an exercise of 2D geophysical modeling using a wavefield illumination simulator. At first, we interpreted two geological models from a seismic line in depth. The geological interpretation was adjusted with information about structural styles in this part of Upper Magdalena Basin. Then, we use a velocity scenario and assign these velocities to both geological models. The wavefield illumination method allows us to see all of the wavepaths in the different pair of source-receivers in order to do a fast evaluation of the structure illumination. This could be used to improve the seismic acquisitions in structurally complex media.

scholarly journals LINKING INTERACTIVE OPTIMIZATION FOR URBAN PLANNING WITH A SEMANTIC 3D CITY MODEL

2018 ◽  
Vol IV-4 ◽  
pp. 179-186 ◽  
Author(s):  
N. Schüler ◽  
G. Agugiaro ◽  
S. Cajot ◽  
F. Maréchal
Keyword(s):  
Urban Planning ◽  
Data Model ◽  
Active Management ◽  
Specific Information ◽  
Exploration Process ◽  
Interactive Optimization ◽  
Potential Applications ◽  
City Model ◽  
Definition Of ◽  
Context Specific

<p><strong>Abstract.</strong> The cities in which we live are constantly evolving. The active management of this evolution is referred to as urban planning. The according development process could go in many directions resulting in a large number of potential future scenarios of a city. The planning support system URB<sup>io</sup> adopts interactive optimization to assist urban planners in generating and exploring those various scenarios. As a computer-based system it needs to be able to efficiently handle all underlying data of this exploration process, which includes both methodology-specific and context-specific information. This article describes the work carried out to link URB<sup>io</sup> with a semantic city model. Therefore, two key requirements were identified and implemented: (a) the extension of the CityGML data model to cope with many scenarios by the proposition of the Scenario Application Domain Extension (ADE) and (b) the definition of a data model for interactive optimization. Classes and features of the developed data models are motivated, depicted and explained. Their usability is demonstrated by walking through a typical workflow of URB<sup>io</sup> and laying out the induced data flows. The article is concluded with stating further potential applications of both the Scenario ADE and the data model for interactive optimization.</p>

Computer-Aided Design Synthesis Using Syntactic Solid Modeling

1994 ◽  
Author(s):  
Vassilios E. Theodoracatos ◽  
Xiaogang Guan
Keyword(s):  
Computer Aided Design ◽  
Solid Modeling ◽  
Large Set ◽  
Complex Structures ◽  
Design Synthesis ◽  
Computer Aided ◽  
Grammar Rules ◽  
Small Set ◽  
Definition Of ◽  
Aided Design

Abstract This paper presents a new Computer-Aided Design (CAD) synthesis model which uses Plex Grammar as structural relationship descriptors and NURBS surface representation for constructing standard and non-standard solid entities. Here, the designer uses a syntactic design methodology for early topological and geometrical definition of the structure of concept alternatives resulting from the design process. This syntactic scheme provides the capability of describing a large set of complex structures by using a small set of simple entities. The recursive nature of the grammar and the hierarchical representation of the structure makes the description of complex structures simple and under the direct control of the designer. An object structure constructive tree is generated and subsequently translated into Plex Grammar production rules in order to form an Interconnection Matrix (ICM) expressing. The resulting Plex structure defined in the ICM expresses the topological information among entities which form the specific types of objects. By modifying the Plex grammar rules, various objects with different geometry and topology can easily be reconstructed. Compared to conventional solid modeling techniques, this approach provides more systematic object generation, easy manipulation and modification, control over congruity and the ability to represent sculptured shapes. Several examples of syntactic solid modeling applied in design synthesis will be presented for further usage in downstream applications.

Enhancing Prediction Accuracy in the Evaluation of Power Plant Uprates Utilizing a Novel ‘Big Data’ Approach

2018 ◽  
Author(s):  
Peter Pechtl ◽  
Christian Scheinecker ◽  
Josef Petek
Keyword(s):  
Big Data ◽  
Power Plant ◽  
Economic Assessment ◽  
Fast Evaluation ◽  
Detailed Model ◽  
Current Configuration ◽  
Fuel Savings ◽  
Operating Modes ◽  
Definition Of ◽  
Operational Data

The evaluation of power plant uprates has traditionally been based on the definition of several ‘typical’ operating modes based on historical data and a — more or less detailed — model of the plant that is compared in current configuration against the same base model including the modifications under consideration. For the economic assessment of the uprate, annual operating hours are allocated to the operating points, and fuel savings and/or additional output predicted by the model due to the modifications are evaluated against the expected investment cost. In this study, the authors demonstrate that this classic approach contains risks in several aspects, in particular: • the representativeness of the ‘typical’ operating modes, • the accuracy of the model, and • the correctness of the assumptions in the allocation of operating hours. Utilizing the example of an actual uprate of a heat recovery steam generator (HRSG) in a large utility plant of an Austrian steel company, a new approach for an evaluation based on ‘big data’ is presented that uses a full year of operational data in hourly granularity for both, the verification of the accuracy of the plant model, and the evaluation of the effect of the uprate. The authors also provide details of the underlying technologies that allow for both, excellent match of operational data with a fully-fledged heat balance software and fast evaluation of tens of thousands of calculation cases.

scholarly journals 3C seismic data processing and interpretation: a case study from Carpathian Foredeep basin

2019 ◽  
Vol 67 (6) ◽  
pp. 2031-2047
Author(s):  
Żaneta Szymańska-Małysa ◽  
Paweł Dubiel
Keyword(s):  
Seismic Profile ◽  
S Wave ◽  
Seismic Line ◽  
Optimal Processing ◽  
Carpathian Foredeep ◽  
Oil And Natural Gas ◽  
Seismic Images ◽  
Gas Bearing ◽  
Complete Processing

Abstract Chałupki Dębniańskie seismic profile 2D–3C is located in Carpathian Foredeep basin, Poland, and is an object of interest for geologists and geophysicists due to the presence of gas-bearing layers. Multicomponent seismic plays a significant role in supporting reservoir analysis related to accumulations of crude oil and natural gas. The purpose of the research was the optimal processing workflow design, which integrated seismic images of three-component 2D seismic line (2D–3C seismic). A complete processing flow for vertical and both horizontal components was conducted to obtain stacks and prestack gathers with preserved amplitude relations (RAP processing). The main issue of the research was the interpretation of S-wave velocity, which was not provided by well log data. The obtained results increased the reliability of seismic interpretation within Chałupki Dębniańskie area. The research provided valuable information regarding amplitude anomalies and helped in the verification of the potential gas accumulations. Several reservoir analysis tools were tested, including seismic attributes and AVO analysis. Conducted research confirmed the existence of reservoir which is characterized by good reservoir parameters.

Design and Fabrication of Structural Connections Using Bi-Directional Evolutionary Structural Optimization and Additive Manufacturing

2016 ◽  
Vol 846 ◽  
pp. 571-576 ◽  
Author(s):  
Hamed Seifi ◽  
Mike Xie ◽  
James O’Donnell ◽  
Nicholas Williams
Keyword(s):  
Additive Manufacturing ◽  
Structural Optimization ◽  
Large Scale ◽  
Limited Area ◽  
Complex Structures ◽  
Evolutionary Structural Optimization ◽  
3D Printed ◽  
Structural Connections ◽  
Definition Of ◽  
Processing Steps

The need to simplify the construction issues of complex structures leads to definition of SmartNodes project as a research which aims to confine the complexity of structure to a limited area (nodes) in order to decrease processing steps and labor intensity by application of additive manufacturing (AM) techniques. Bi-Directional Evolutionary Structural Optimization (BESO) is used to design efficient and elegant nodal connections of large scale spatial structures and minimise the volume of nodes to be printed and to ultimately replace welded, forged and cast connections by 3D printed connections. The prototypes discussed in this paper demonstrate BESO design process through two generic cases.

Integrated Geological Interpretation and Impact on the Definition of Neogene Plays in the Isthmus Saline Basin, Mexico

2009 ◽  
Author(s):  
Alejandro A. Sosa Patrón ◽  
Juan de G. Cárdenas López ◽  
Celia Cárdenas Lara ◽  
Oscar Pinto Gómez ◽  
Ma. Elena Guzzy Arredondo ◽  
...  
Keyword(s):  
Geological Interpretation ◽  
Definition Of

Characterisation of the Geology of the UK Low Level Waste Repository

2011 ◽  
Author(s):  
John Shevelan ◽  
Nicholas T. Smith
Keyword(s):  
Site Investigation ◽  
Environmental Safety ◽  
Geological Model ◽  
Hydrogeological Model ◽  
Geological Interpretation ◽  
Low Level ◽  
Geological Models ◽  
Waste Repository ◽  
Site Characterisation ◽  
The Uk

The UK Low Level Waste Repository Ltd (LLWR) submitted an Environmental Safety Case (ESC) for the disposal of low-level waste (LLW) to the UK Environment Agency on the 1st of May 2011. As part of the ESC, the LLWR have to demonstrate that a programme of site investigation and site characterisation has been carried out to provide the requisite information for the ESC and support facility design and construction. This paper explains the development of the site investigation programme and how the understanding of the geology of the site has developed. The geological environment in the region of the LLWR consists of Quaternary age deposits overlying older bedrock. The site has been subjected to a series of site investigation programmes from 1939 to the present day. The development of 3-D geological models was necessary to integrate data from boreholes, trial pits, geophysical investigations and beach exposures and data gained from site operations. The understanding of the geology has developed with each new set of data. Early simple interpretations from a few boreholes have been superseded by a series of more complex interpretations each incorporating the increasingly detailed observations. Initial attempts to develop a lithostratigraphic representation of the geology proved difficult. It was also difficult provide a clear link between the geology and the hydrogeology using a lithostratigraphic approach as required for the development of hydrogeological models. A lithofacies approach to characterising the geology was adopted in 2007, which has allowed the grouping of geological units with similar hydraulic properties and the development of a regional 3-D geological model. The 3-D geological model has been used as the framework for the development of a hydrogeological model for the site. The development of the 3-D geological models has been iterative. It was observed that there are differences between models developed using solely mathematical interpolation and those controlled by geological interpretation. The different representations of the geological information have been used to consider the effects of uncertainty in the geological interpretation in the hydrogeological modelling.

Ist die Kernfamilie universal? / The nuclear family. Is it universal?

1974 ◽  
Vol 3 (4) ◽  
Author(s):  
Rolf Eickelpasch
Keyword(s):  
Structural Analysis ◽  
Nuclear Family ◽  
Complex Structures ◽  
Sociocultural Context ◽  
Dyadic Relationship ◽  
Dependent Children ◽  
The Family ◽  
Definition Of ◽  
Historical Developments

AbstractThe widely accepted hypothesis of the universality of the nuclear family in human cultures owes its popularity above all to the work of G.P. MURDOCK. Subjected to the test of a crosscultural, structural analysis of a selected number of societies the thesis is proved untenable.The nuclear family turns out to be neither a universal nor a prerequisite. This constellation is but one of a number of possible combinations of elementary dyadic relationship clustered around the fundamental mother-child unit.The pattern in which this latter relationship is compounded with the dyads spouse-spouse, father-child and sibling-sibling into more complex structures varies from society to society and is subject to specific economic and historical developments. A formalized definition of the family as “the group consisting of a man and his wife together with their unmarried, dependent children” contributes neither to an explanation of the concrete sociocultural context in which such a structure exists nor of the nature of the relationships, which such a structure imposes on the persons involved.

scholarly journals Enhancing time resolution by stabilized inverse filter and Q estimated on instantaneous spectra

2014 ◽  
Vol 18 (1) ◽  
pp. 63-67
Author(s):  
Luis Alfredo Montes ◽  
Álvaro Corrales ◽  
Francisco Cabrera
Keyword(s):  
Time Resolution ◽  
Matching Pursuit ◽  
Accurate Estimation ◽  
Analysis Method ◽  
Seismic Line ◽  
Seismic Resolution ◽  
Frequency Components ◽  
Spectral Analysis Method ◽  
Physical Phenomena ◽  
Seismic Images

<p>Physical phenomena, such as attenuation of high frequency components and velocity dispersion, deteriorate seismic images. To enhance seismic resolution, Q filtering is usually applied, where the accurate estimation of Q is the core of this approach. The Matching Pursuit (MP) approach is an instantaneous spectral analysis method that overcomes windowing problems caused by decomposing a seismic trace, providing a frequency spectrum for each time sample of the trace. By changing variables, the spectra is transformed into a new domain where Q is accurately measured. This value is input to a stable inverse Q filter, which solely compensates for the amplitude without distorting the phase, and as a result, an improved time-resolution image is obtained. MP, windowed Fourier (WF), and Gabor transforms (GT) were tested on synthetic seismograms providing Q values that indicated the best performance of MP. Applied to a migrated offshore Colombian seismic line, the entire procedure coded in Matlab compensated for the energy losses and increased the S/N ratio. The trace-by-trace approach guarantees the reliability of the improvement in the continuity of seismic events and is applicable to pre-stack data as well.</p><p> </p><p><strong>Resumen</strong></p><div class="page" title="Page 1"><div class="section"><div class="layoutArea"><div class="column"><p><span>Los fenómenos físicos de atenuación de los componentes de alta frecuencia y dispersión por velocidad de fase </span><span>deterioran la imagen sísmica. Para incrementar la resolución sísmica usualmente se aplican filtros Q inversos, por lo que la estimación precisa del factor de calidad Q es el problema central de este método. El “</span><span>Matching Pursui</span><span>t” (MP) </span><span>es un método de análisis espectral instantáneo que supera los problemas generados al usar ventanas para descomponer una traza, generando un espectro de frecuencia por cada muestra de la traza. Mediante un cambio de variables el espectro se transforma a un nuevo dominio donde se estima Q con precisión. Éste valor se alimenta a un filtro Q inverso estabilizado, el cual compensa solamente la amplitud sin distorsionar la fase obteniendo como resultado se logra una imagen con mejor resolución. Los métodos de MP, transformada de Fourier con ventanas y transformada de Gabor se ensayaron con datos sintéticos suministrando valores de Q que señalaban el mejor desempeño de MP. El proceso completo fue codificado en Matlab y aplicado a una sección marina Colombiana migrada, compensando la perdida de energía e incrementando la relación señal/ruido. El enfoque de traza por traza garantiza la confianza en el realce de la continuidad de los eventos sísmicos, siendo aplicable a datos pre-apilados. </span></p></div></div></div></div><p> </p>

Monitoring System of a High-Rise Building during Operation

2020 ◽  
pp. 3-12
Author(s):  
A.G. Shashkin ◽  
◽  
K.G. Shashkin ◽  
N.A. Evseev ◽  
V.M. Lukin ◽  
...  
Keyword(s):  
Monitoring System ◽  
Theory And Practice ◽  
Monitoring Systems ◽  
Design Calculation ◽  
Complex Structures ◽  
High Rise ◽  
High Rise Building ◽  
Reverse Analysis ◽  
Construction Operation ◽  
Definition Of

Monitoring of structures during operation is a direct requirement of the current legislation, especially relevant for technically complex structures, which include high-rise buildings. It is important not only for ensuring mechanical safety during construction operation, but also as a tool for reverse analysis of the actual stress-strain state of structures and foundations for compliance with the design calculation forecast, which should ultimately contribute to the development of construction theory and practice. The article is devoted to the organization of monitoring during the operation of the Lakhta Center skyscraper in St. Petersburg. The basis of the monitoring system is a design model of the building that interacts with the base making it possible to give the monitoring an interactive character. Particular attention is paid to the definition of «alarms» that make it possible to signal timely about the occurrence of negative trends helping to eliminate the occurrence of an emergency. It is shown that the calculations for justifying the criteria of monitoring systems differ significantly from the usual calculations when designing. The article defines the features of a workable monitoring system, to which the system implemented in practice fully corresponds. A comparison of the readings set in the design of measuring equipment and design expectations is given. The example of a high-rise building shows how to assign the «alarm» and «accident» criteria to ensure the operability of the monitoring system during operation.

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