Study on Topic Tree-Based Topic Structure Modeling

2014 ◽  
Vol 687-691 ◽  
pp. 1320-1323
Author(s):  
Yin Fei Huang ◽  
Qian Chen ◽  
Shu Han Yuan ◽  
Dong Dong Lv ◽  
Qi Zhang
Keyword(s):  
Probability Theory ◽  
Simulation Experiment ◽  
Structure Modeling ◽  
Structure Model ◽  
Time And Space ◽  
Kl Divergence ◽  
News Corpus ◽  
Topic Structure

The topic tree-based topic structure model is proposed using five-tuple and probability theory of ontology. Vocabularies in the glossary are presented with leaf nodes of the topic tree. The results of simulation experiment on real news corpus eventually show that the topic similarity of sym-KL divergence could construct a topic tree more accurately and dig the potential semantic topic characteristics of time and space more deeply in the text stream compared with other flat topic structure models.

Methods of Fault Modeling by Well-to-Seismic Integration

2015 ◽  
Vol 733 ◽  
pp. 178-181
Author(s):  
Peng Yan Wang ◽  
Yao Hua Li ◽  
Ze Yu Li
Keyword(s):  
Seismic Data ◽  
Digital Simulation ◽  
Fault Modeling ◽  
Geological Structure ◽  
Fault Model ◽  
Structure Modeling ◽  
Structure Model ◽  
Important Work ◽  
Body Checking ◽  
Property Modeling

Geological structure model is the foundation of the sedimentary faces modeling, property modeling and digital simulation, which includes the horizon model and fault model. Fault model which is accorded with underground conditions plays an important role in the structure modeling, so it would be an important work to build the fault model perfectly with the seismic and logging data. This paper take the fault modeling of C84-6 well area in Chaoyanggou field as an example, building the fault model by four methods of ‘Projection of polygon’ ‘Correction of depth domain seismic body’ ‘Checking by overlooking’ ‘Correction of breakpoints’ by the software of Petrel. The fault model which is built by integrating logging and seismic data can be the skeleton to build the final geological structure model, and those methods mentioned in this paper has been applied to the modeling work in some adjacent areas at present.

e

2020 ◽  
pp. 82-92
Author(s):  
Marcel Danesi
Keyword(s):  
Probability Theory ◽  
Time And Space ◽  
Growth And Change ◽  
A Chain ◽  
Compound Interest ◽  
Mathematical Discovery

The number e, which is equal to 2.71828…, might seem like something trivial—a play on numbers by mathematicians. Nothing could be further from the truth. It is defined as the limit of the expression (1 + 1/n)n as n becomes large without bound. What possible connection does this number have with other areas of mathematics? As it turns out, it forms the base of natural logarithms; it appears in equations describing growth and change; it surfaces in formulas for curves; it crops up frequently in probability theory; and it appears in formulas for calculating compound interest. It is another example of how the ideas in mathematics are not isolated ones, but highly interrelated. The purpose of this chapter is, in fact, to link e to other great ideas, showing how mathematical discovery forms a chain—a chain constructed with a handful of fundamental ideas that appear across time and space, finding form and explanation in the writings and musings of individual mathematicians.

Three Dimensional Fine Structure Modeling of Haqian1 Wellblock, in Northern Dzungaria Basin, China

2013 ◽  
Vol 734-737 ◽  
pp. 488-492
Author(s):  
Chen Qiang Dong ◽  
Fang Ding ◽  
Wei Wei Ren
Keyword(s):  
Three Dimensional ◽  
Fault Model ◽  
Structure Modeling ◽  
Good Prospect ◽  
Geological Model ◽  
Structure Model ◽  
Geological Modeling ◽  
Geological Exploration ◽  
3D Geological Modeling ◽  
Set Up

Haqian wellblock has a very good prospect in Dzungaria Basin, as it developed many faults and some formations are truncated, the development situation of it is very complicated, in this paper, we applied 3D geological modeling method which is one of the most important technology methods in describing the underground development situation, to illustrate the intricate structure. This geological model involved computer modeling and visualization of geological fault in 3D, the type of data of geological faults based on geological exploration is analyzed, after the fault model and horizon model are built, a whole structure model is finally set up.

Structure Model Analysis of the Effects of Mutations in the Phosphorylation Sites of SARS-CoV-2 Encoded Nucleocapsid Protein

2020 ◽  
Vol 3 (1) ◽  
pp. 023-030
Author(s):  
Pierre Limtung ◽  
HY Lim Tung
Keyword(s):  
Binding Energy ◽  
Nucleocapsid Protein ◽  
Thermodynamic Calculation ◽  
Model Analysis ◽  
Structure Modeling ◽  
Phosphorylation Sites ◽  
Structure Model ◽  
Rich Domain ◽  
Recognition Sites ◽  
Stability Energy

Mutations in several phosphorylation sites within the phosphorylation rich domain of SARS-COV-2 Nucleocapsid protein (NCp), including serines 186, 197 and 202, and adjacent arginine 203 and glycine 204 have been described and have been proposed to prevent the binding and sequestration of NCp by Protein 14-3-3. Structure modeling and thermodynamic calculation show that mutations of phosphorylation sites, phospho-serines 186, 197 and 202 to phenylalanine, leucine and asparagine, and phosphorylation recognition sites, arginine/glycine 203/204 to lysine/arginine or lysine/threonine resulted in signifi cant destabilization of the NCp-14-3-3 complex by causing a decrease in Stability Energy (ΔGstability energy) and Binding Energy (ΔΔGbinding energy). These results evidenced that mutations in NCp underlie a mechanism to bypass sequestration by Protein 14-3-3 which would result in enhanced dimerization of NCp, and replication, transcription and packaging of the SARS-COV-2 genome

Computer Aided Product Structure Modeling Using a DBMS

1993 ◽  
Author(s):  
H. L. Johannesson
Keyword(s):  
Product Structure ◽  
Structure Modeling ◽  
Structure Model ◽  
Product Model ◽  
Geometric Information ◽  
Data Bases ◽  
Embodiment Design ◽  
Product Models ◽  
Computer Based ◽  
Data Base Management System

Abstract In the present paper a computer based method for top-down structure modeling of products is presented. A general hierarchical DBMS-based tree structure model is used. It is designed so that it can be connected to separately designed part product models, containing geometric models and references to standard component data bases and manufacturing documents. Together the presented product structure model and the part product models become a complete product model containing structural as well as geometric information. The structure modeling is meant to be carried out as a first step during the embodiment design phase, before the parts are designed and the standard components are selected. Thus the geometric information is incomplete during the structure modeling phase. A computer program for product structure modeling has been developed. It allows the number of hierarchical structure levels, as well as the number of objects on each level, to be chosen arbitrarily by the user. The data base management system TORNADO is used by the modeling program for building the structure model data bases. A structure modeling example is given in order to demonstrate the structure modeling procedure and the capabilities of the program.

scholarly journals Diameter structure modeling and the calculation of plantation volume of black poplar clones

2004 ◽  
pp. 37-51 ◽  
Author(s):  
Sinisa Andrasev ◽  
Milivoj Vuckovic ◽  
Savo Roncevic ◽  
Martin Bobinac
Keyword(s):  
Production Level ◽  
Diameter Distribution ◽  
Weibull Function ◽  
Structure Modeling ◽  
Structure Model ◽  
Stand Volume ◽  
Black Poplar ◽  
Poplar Clones ◽  
Diameter Structure

A method of diameter structure modeling was applied in the calculation of plantation (stand) volume of two black poplar clones in the section Aigeiros (Duby): 618 (Lux) and S1-8. Diameter structure modeling by Weibull function makes it possible to calculate the plantation volume by volume line. Based on the comparison of the proposed method with the existing methods, the obtained error of plantation volume was less than 2%. Diameter structure modeling and the calculation of plantation volume by diameter structure model, by the regularity of diameter distribution, enables a better analysis of the production level and assortment structure and it can be used in the construction of yield and increment tables.

Fast calibration of CBED patterns for quantitative analysis

1993 ◽  
Vol 51 ◽  
pp. 674-675
Author(s):  
M.A. Gribelyuk ◽  
M. Rühle
Keyword(s):  
Reciprocal Lattice ◽  
Accurate Determination ◽  
Incident Beam ◽  
Crystal Thickness ◽  
Structure Model ◽  
Beam Direction ◽  
Transmitted Beam ◽  
Reciprocal Vector ◽  
On Line

A new method is suggested for the accurate determination of the incident beam direction K, crystal thickness t and the coordinates of the basic reciprocal lattice vectors V1 and V2 (Fig. 1) of the ZOLZ plans in pixels of the digitized 2-D CBED pattern. For a given structure model and some estimated values Vest and Kest of some point O in the CBED pattern a set of line scans AkBk is chosen so that all the scans are located within CBED disks.The points on line scans AkBk are conjugate to those on A0B0 since they are shifted by the reciprocal vector gk with respect to each other. As many conjugate scans are considered as CBED disks fall into the energy filtered region of the experimental pattern. Electron intensities of the transmitted beam I0 and diffracted beams Igk for all points on conjugate scans are found as a function of crystal thickness t on the basis of the full dynamical calculation.

Sign in / Sign up

Export Citation Format

Share Document