radial model
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2021 ◽  
Author(s):  
Alexander Kolomytsev ◽  
◽  
Yulia Pronyaeva Pronyaeva ◽  

Most conventional log interpretation technics use the radial model, which was developed for vertical wells and work well in them. But applying this model to horizontal wells can result in false conclusions. The reasons for this are property changes in vertical direction and different depth of investigation (DOI) of logging tools. DOI area probably can include a response from different layers with different properties. All of this complicates petrophysical modeling. The 3D approach for high angle well evaluation (HAWE) is forward modeling in 3D. For this modeling, it is necessary to identify the geological concept near the horizontal well section using multiscale data. The accuracy of modeling depends on the details of the accepted geological model based on the data of borehole images, logs, geosteering inversion, and seismic data. 3D modeling can be applied to improve the accuracy of reservoir characterization, well placement, and completion. The radial model is often useless for HAWE because LWD tools have different DOI and the invasion zone was not formed. But the difference between volumetric and azimuthal measurements is important for comprehensive interpretation because various formations have different properties in vertical directions. Resistivity tools have the biggest DOI. It is important to understand and be able to determine the reason for changes in log response: a change in the properties of the current layer or approaching the layers with other properties. For this, it is necessary to know the distance to the boundaries of formations with various properties and, therefore, to understand the geological structure of the discovered deposits, and such information on the scale of well logs can be obtained either by modeling or by using extra deep resistivity inversion (mapping). The largest amount of multidisciplinary information is needed for modeling purposes - from images and logs to mapping and seismic data. Case studies include successful examples from Western Siberia clastic formations. In frame of the cases, different tasks have been solved: developed geological concept, updated petrophysical properties for STOIIP and completion, and provided solutions during geosteering. Multiscale modeling, which includes seismic, geosteering mapping data, LWD, and imagers, has been used for all cases.


2021 ◽  
Vol 226 (2) ◽  
pp. 575-600 ◽  
Author(s):  
Elena Garcia-Calero ◽  
Luis Puelles

AbstractThe amygdala in mammals plays a key role in emotional processing and learning, being subdivided in pallial and subpallial derivatives. Recently, the cortical ring model and the pallial amygdalar radial model (Puelles et al. 2019; Garcia-Calero et al. 2020) described the pallial amygdala as an histogenetic field external to the allocortical ring, and subdivided it in five major radial domains called lateral, basal, anterior, posterior and retroendopiriform units. The anterior radial unit, whose cells typically express the Lhx9 gene (see molecular profile in Garcia-Calero et al. 2020), is located next to the pallial/subpallial boundary. This radial domain shows massive radial translocation and accumulation of its derivatives into its intermediate and superficial strata, with only a glial palisade representing its final periventricular domain. To better understand the development of this singular radial domain, not described previously, we followed the expression of Lhx9 during mouse amygdalar development in the context of the postulated radial subdivisions of the pallial amygdala and other telencephalic developmental features.


2020 ◽  
Vol 222 (3) ◽  
pp. 2189-2204
Author(s):  
B L N Kennett

SUMMARY The current set of reference models for the radial variation of Earth structure have been in use for several decades, and provide a good representation of many aspects of the seismic wavefield. Nevertheless, strong constraints from the differential times between pairs of SmKS phases indicate the need to modify the P wave speed profile in the upper part of the outer core. In order to incorporate such a change and maintain the representation of the full suite of seismic phases compensatory adjustments have to be made, dominantly in the mantle. Using multi-objective optimization, a new preferred radial model ek137 has been generated that provides a good representation of the traveltimes of all core phases. An adiabatic profile can be maintained through most of the outer core, but departures are needed at the base, as in the ak135 model. The latest estimates for inner core shear wave speed are included in ek137.


2020 ◽  
Vol 18 (1) ◽  
pp. 1-45 ◽  
Author(s):  
Alexander Andrason ◽  
D. Allen Hutchison

Abstract This article examines the lexical class of interjections in Biblical Aramaic through the framework of an interjectional prototype and its functional (semantic and pragmatic) and formal (phonetic, morphological, and syntactic) characteristics. The authors analyse eight interjectional lexemes or constructional patterns, attested in twenty-four uses, for their compliance to the canonical prototype. The evidence reveals significant variation in the interjections’ canonicity: high canonicity in primary interjections, semi-canonicity in nearly primary interjections, and low canonicity in secondary interjections.


Energies ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 3436 ◽  
Author(s):  
Xiaoyang Zhou ◽  
Hao Chen ◽  
Hao Wang ◽  
Benjamin Lev ◽  
Lifang Quan

With the acceleration of industrialization, a large amount of energy consumption has brought tremendous pressure to the natural environment. In order to prevent environmental pollution and promote sustainable development, the environmental efficiency assessment as an effective way to provide decision-making basis has been given wide attention. This study measures the environmental efficiency of 30 provinces in China from 2006 to 2015 based on the Data Envelopment Analysis (DEA) environmental assessment radial model both under natural disposability and managerial disposability that considered the constant variable return to scale (RTS) and the damage to scale (DTS). In addition, the scale efficiency under the two kinds of disposability of China’s 30 provinces were also measured. We found that the environmental efficiencies of different provinces in China showed regional disparities. Provinces such as Beijing, Shanghai, and Guangdong had a good performance in unified environmental efficiency and scale efficiency both under natural disposability and managerial disposability. Generally speaking, the eastern regions always performed better than the central and western regions in unified environmental efficiency during the observed years. Therefore, policies should be established to distribute the resources in balance between the east, center, and west to further promote environmental efficiency.


Agronomy ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 390 ◽  
Author(s):  
Mikhail A. Genaev ◽  
Evgenii G. Komyshev ◽  
Nikolai V. Smirnov ◽  
Yuliya V. Kruchinina ◽  
Nikolay P. Goncharov ◽  
...  

Spike shape and morphometric characteristics are among the key characteristics of cultivated cereals associated with their productivity. Identification of the genes controlling these traits requires morphometric data at harvesting and analysis of numerous plants, which could be automatically done using technologies of digital image analysis. A method for wheat spike morphometry utilizing 2D image analysis is proposed. Digital images are acquired in two variants: a spike on a table (one projection) or fixed with a clip (four projections). The method identifies spike and awns in the image and estimates their quantitative characteristics (area in image, length, width, circularity, etc.). Section model, quadrilaterals, and radial model are proposed for describing spike shape. Parameters of these models are used to predict spike shape type (spelt, normal, or compact) by machine learning. The mean error in spike density prediction for the images in one projection is 4.61 (~18%) versus 3.33 (~13%) for the parameters obtained using four projections.


2019 ◽  
Vol 24 (2) ◽  
pp. 393-412
Author(s):  
EWELINA PRAŻMO

This article proposes a cognitive linguistic analysis of the prefix post- in contemporary English by looking into the possible motivations of the semantic changes which have led to the increasing applicability of the prefix. The prefix's productivity in combinations such as post-truth and post-fact calls for expanding its original definition. These recent combinations go beyond the main two established meanings of the prefix, namely the spatial and the temporal meaning. In order to explain this semantic extension a radial model of categorisation is proposed. Offering an analysis of contexts in which the prefix post- is used in British and American press coverage, especially in relation to the 2016 UK Brexit referendum and the 2016 US presidential campaign, the article claims that the appearance of the prefix in new combinations is motivated by the need to describe the changing reality (especially in political and media discourse).


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