Relevant bibliographies by topics / Densification verticale

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Academic literature on the topic 'Densification verticale'

Author: Grafiati
Published: 4 May 2024

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Journal articles on the topic "Densification verticale"

1

Arpit Kumbhar and Dr. Ajay Radke. "Vertical Extension and Retrofitting of the Existing R.C.C. Commercial Building – A review." International Research Journal on Advanced Engineering Hub (IRJAEH) 2, no. 03 (2024): 559–63. http://dx.doi.org/10.47392/irjaeh.2024.0081.

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This study explores the feasibility of vertically extension of existing buildings as a sustainable solution to urban densification, particularly focusing on the structural implications and potential benefits of such extensions. Through structural analysis using advanced software like ETAB, and SAFE. as well as examination of cost-effectiveness, the research evaluates the viability of vertical extensions in different contexts. Case studies from various regions, illustrate the technical challenges and benefits associated with vertical extension projects. The analysis encompasses considerations such as structural stability of existing building after floor extensions, and cost implications, offering insights into the most efficient methods for extending buildings vertically. This research underscores the importance of vertical extension as a sustainable urban development strategy and calls for greater awareness and adoption of this approach within the construction industry. It emphasizes the need for collaborative efforts among stakeholders and proposes a development process to streamline the implementation of vertical extension projects.
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Douša, Jan, and Pavel Václavovic. "Results of GPS reprocessing campaign (1996-2011) provided by Geodetic observatory Pecný." Geoinformatics FCE CTU 9 (December 22, 2012): 77–90. http://dx.doi.org/10.14311/gi.9.7.

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The paper presents the GOP first reprocessing results, which officially contributed to the EPN-repro1 project. It also describes the 15-year GOP cumulative solution providing station coordinates, velocities and their discontinuities over the period of 1996-2011. Repeatabilities estimated from cleaned long-term coordinate time-series reached 1-2 mm and 4-6 mm in horizontal and vertical component, respectively. We then showed the exploitation of GOP reprocessing results in the assessment of the EUREF ITRF2005 densification and the latest ITRS realization, ITRF2008. We identified and confirmed the North-South tilt (≈ 2mas) in the currently available European reference frame based on the EPN cumulative solution updated in GPS week 1600. The study showed a historical development of the tilt and its close relation to a weak velocity datum definition of this realization, which is very important for a long-term datum prediction. Selected EPN station coordinates, velocities and discontinuities of the latest ITRS realization (ITRF2008) were also assessed. Specific problems for some EPN stations were identified in the global reference frame. This emphasized further necessity to check all the stations before their use for datum definition for regional densifications.
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3

Zheng, Siqi. "Feasibility study on infilling of horizontal wells with difficult to recover reserves in Fuyu reservoir." E3S Web of Conferences 329 (2021): 01042. http://dx.doi.org/10.1051/e3sconf/202132901042.

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Aiming at the inter well drive immobile remaining oil in Fuyu oil layer of block 1 due to the non densification of surface village coverage, taking into account the undeveloped reserves that can not be produced by vertical wells due to being located in the wetland protection area along the river, the feasibility study of layered densification of horizontal wells in the main oil layer with good reservoir development is carried out to explore a new densification mode of horizontal wells in Fuyu tight oil reservoir.
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4

Zhong, Ji Xiang. "Subgrade Compaction Boundary Layer Detection Method and Detection System." Advanced Materials Research 639-640 (January 2013): 1259–64. http://dx.doi.org/10.4028/www.scientific.net/amr.639-640.1259.

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At present, the degree of compaction is the main criterion for subgrade compaction quality.It is the relative expression of the compacted density,Just average.It does not adequately reflect the subgrade compaction layer vertical compaction density distribution law. Compaction boundary layer micro-unit compression pressure on in the process of pressure transmission decreases gradually until they reach the critical formation pressure dense layer. Compaction by detecting the boundary layer vertical zone layer densification, to calculate the boundary thickness, to draw isodense of densification. a clear reproduction of the compacted layer vertical compaction density distribution law. This paper describes the detection principles and detection methods of the compaction boundary layer. describes in detail functional structure and system design of the vehicle automatic detection system used to detect compaction boundary layer of each vertical zone.
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5

Denies, N., J. Canou, J. N. Roux, and A. Holeyman. "Vibrocompaction properties of dry sand." Canadian Geotechnical Journal 51, no. 4 (2014): 409–19. http://dx.doi.org/10.1139/cgj-2012-0436.

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The fundamental understanding of the behaviour of dry sand as it is being vibrated is necessary to properly address a number of engineering issues, such as the vibrocompaction process. The present paper first summarizes experimental works focusing on the effects of vibrations on the volume change of dry cohesionless soils. Original experiments characterizing the behaviour of dry sand subjected to vertical vibration are then presented. The volume change and the motion pattern displayed by vertically vibrated sand particles are discussed. When cohesionless soil, placed in a cylindrical container, is vertically vibrated under the gravitational field (g), experiments performed on dry Fontainebleau sand allow the distinction between three types of dynamic behaviours depending on the acceleration amplitude (a): the densification behaviour (a/g < 1), the instability surface behaviour (a/g ≈ 1), and the vibrofluid behaviour (a/g > 1). In the densification range, the sand simply settles. When the acceleration amplitude is increased beyond 1g, granular convection is observed and there is an instability in the sand mass leading to the emergence of an inclined free surface. If the acceleration amplitude is further increased, the free surface progressively flattens. There is an impressive dilatation of the whole sample and grain saltation is observed. The sand becomes fully vibrofluidized. The efficiency of the vibrocompaction process is finally discussed especially with regard to these dynamic behaviours.
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An, Xizhong, Fei Huang, Kejun Dong, and Xiaohong Yang. "DEM simulation of binary sphere packing densification under vertical vibration." Particulate Science and Technology 36, no. 6 (2017): 672–80. http://dx.doi.org/10.1080/02726351.2017.1292335.

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7

Mirza Gheitaghy, Amir, René H. Poelma, Leandro Sacco, Sten Vollebregt, and Guo Qi Zhang. "Vertically-Aligned Multi-Walled Carbon Nano Tube Pillars with Various Diameters under Compression: Pristine and NbTiN Coated." Nanomaterials 10, no. 6 (2020): 1189. http://dx.doi.org/10.3390/nano10061189.

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In this paper, the compressive stress of pristine and coated vertically-aligned (VA) multi-walled (MW) carbon nanotube (CNT) pillars were investigated using flat-punch nano-indentation. VA-MWCNT pillars of various diameters (30–150 µm) grown by low-pressure chemical vapor deposition on silicon wafer. A conformal brittle coating of niobium-titanium-nitride with high superconductivity temperature was deposited on the VA-MWCNT pillars using atomic layer deposition. The coating together with the pillars could form a superconductive vertical interconnect. The indentation tests showed foam-like behavior of pristine CNTs and ceramic-like fracture of conformal coated CNTs. The compressive strength and the elastic modulus for pristine CNTs could be divided into three regimes of linear elastic, oscillatory plateau, and exponential densification. The elastic modulus of pristine CNTs increased for a smaller pillar diameter. The response of the coated VA-MWCNTs depended on the diffusion depth of the coating in the pillar and their elastic modulus increased with pillar diameter due to the higher sidewall area. Tuning the material properties by conformal coating on various diameter pillars enhanced the mechanical performance and the vertical interconnect access (via) reliability. The results could be useful for quantum computing applications that require high-density superconducting vertical interconnects and reliable operation at reduced temperatures.
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8

Solovev, S. A., O. V. Soloveva, I. G. Akhmetova, Y. V. Vankov, and R. Z. Shakurova. "Numerical investigation of the thermal conductivity of a composite heat-insulating material with microgranules." Power engineering: research, equipment, technology 24, no. 1 (2022): 86–98. http://dx.doi.org/10.30724/1998-9903-2022-24-1-86-98.

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THE PURPOSE. To consider the problems that arise when creating a composite heatinsulating material, including a layer of microspherical granules. Numerical modeling of a composite material with different volume content of microspheres and different options for the formation of voids. Determination of the influence of the presence of zones not occupied by microgranules on the insulating properties of the composite material. Determination of the influence of the volume content of microspherical granules on the heat flux through the composite material.METHODS. Numerical simulation was carried out by creating models of elementary cubic cells of a composite with a package of 27 microspheres in the ANSYS Fluent 19.2 software package. The evaluation of the insulating properties was carried out by measuring the thermal conductivity coefficient.RESULTS. The article investigates the influence of the presence of zones not occupied by microspherical granules on the thermal insulation properties of a composite material. Models of elementary cubic cells with different volume content of microgranules are constructed. Models of elementary cells are built with various options for the formation of voids, such as the removal of a vertical or horizontal row of granules and the compaction of granules vertically or horizontally.CONCLUSION. The removal of microgranules has a significant effect on the insulating properties of the composite. The lowest thermal conductivity coefficient was obtained for a simple cubic cell with a volume content of microgranules φ = 40%. The presence of voids in the material contributes to large heat losses, and in the case of a vertical through channel, the heat losses are greater than for a horizontal through channel. In the case of densification of spheres, heat losses in the zone not occupied by microgranules are compensated by a decrease in the heat flux in the area with densification of spheres.
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Endo, Yasoichi, Yuji Kominami, and Shouji Niwano. "Dependence of new-snow density on slope angle." Annals of Glaciology 26 (1998): 14–18. http://dx.doi.org/10.3189/1998aog26-1-14-18.

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The mass per unit horizontal area, vertical height and density of new snow accumulated on various slopes of 0° to 75° were measured. Although the mass of new snow on these slopes was nearly the same, vertical height increased and density decreased with increase of slope angle. Differences in heights and densities of new snow due to slope angle were explained by considering both accumulation and densification processes on the slopes.
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10

Endo, Yasoichi, Yuji Kominami, and Shouji Niwano. "Dependence of new-snow density on slope angle." Annals of Glaciology 26 (1998): 14–18. http://dx.doi.org/10.1017/s0260305500014464.

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The mass per unit horizontal area, vertical height and density of new snow accumulated on various slopes of 0° to 75° were measured. Although the mass of new snow on these slopes was nearly the same, vertical height increased and density decreased with increase of slope angle. Differences in heights and densities of new snow due to slope angle were explained by considering both accumulation and densification processes on the slopes.
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