Thermal pattern

This study developed a statistical model for thermal analysis to describe the variation of railway temperature that aids in detecting the potential excessive displacement in the railway efficiently. In particular, the Seasonal autoregressive integrated moving average (SARIMA) model is adopted to learn and recognize the variation patterns of railroad temperature with time.

5p dathienlang1012 03-05-2024 4 0   Download

This study uses computational fluid dynamics (CFD) to understand partial pre-mixed compression combustion (PPCI), with HCCI and RCCI being advanced low-temperature combustion concepts. Lowering the average combustion temperature is an advantage of PCCI; it optimizes CO and NOx emission rates while maintaining high thermal efficiency.

8p visergey 02-04-2024 6 0   Download

Part 1 book "Ecological physiology of daily torpor and hibernation" includes content: Introduction, background and definitions, quantifying torpor, diversity and geography of torpor and heterothermy, patterns and expression of torpor, physiology and thermal biology, seasonality of daily torpor and hibernation.

180p oursky04 14-09-2023 4 2   Download

A metamaterial design is introduced herein, which exhibits negative thermal expansion during heating but reverses into positive thermal expansion during cooling with respect to the reference temperature. The metamaterial is inspired by geometric patterns found at the Alhambra Palace and the Great Mosque of Cordoba and designed using bimetallic strips.

6p viberbers 09-08-2023 4 3   Download

Continued part 1, part 2 of ebook "Fluid dynamics: An introduction" has presents the following content: thermal convection; baroclinicity or the impossibility of static equilibrium; Rayleigh–Bénard instability; convection patterns; the weakly nonlinear amplitude range; rotating fluids; turbulence; magnetohydrodynamics; beyond fluid mechanics - an introduction to the statistical foundations of gas dynamics; complements of mathematics;...

264p dieptieuung 20-07-2023 9 3   Download

: Fluid vents in the Sea of Marmara were discovered and investigated by several studies. In this paper, a numerical model is created for the first time to determine the possible transport mechanism behind those fluid emissions at the seafloor. The finite volume method is used for numerical simulations by implementing a commercial finite volume code, ANSYS-Fluent. The thermal and physical rock properties used in our models are taken from previous studies.

11p tanmocphong 29-01-2022 7 1   Download

The study investigates the changing pattern of the SUHI and its magnitude with Landsat TM/OLI time-series satellite imageries from 1988 to 2018 and establishes the relationship between LC change and LST variations in Chattogram city. The relationships are defined by correlation analysis, cross-section profiles, and Simple Linear Regression Models (SLRM).

14p thebadguys 15-01-2022 12 0   Download

This paper presents the conceptual design of a 300 MWt small modular reactor (SMR) using fuel assemblies of the AP1000 reactor. Numerical calculations have been performed to evaluate a proper active core size and core loading pattern using the SRAC code system and the JENDL-4.0 data library.

6p trinhthamhodang1218 14-03-2021 13 2   Download

Nanocomposites based on polyaniline (PANI) and montmorillonite (MMT) were prepared by in-situ polymerization of aniline monomers using FeCl3 as oxidant in the presence of MMT. X-ray diffraction patterns (XRD) showed that the obtained materials were in the nanostructures.

6p larachdumlanat127 20-12-2020 18 2   Download

The identification of DNA methyltransferases (Dnmt) expression patterns during development and their regulation is important to understand the epigenetic mechanisms that modulate larval plasticity in marine fish. In this study, dnmt1 and dnmt3 paralogs were identified in the flatfish Solea senegalensis and expression patterns in early developmental stages and juveniles were determined.

14p viwyoming2711 16-12-2020 11 1   Download

Borotellurite glasses were prepared by melt quenching technique. Amorphous nature of samples was confirmed through X-ray diffraction (XRD) patterns. Effect of B2O3 content on the structure of glass network was studied through Fourier-transform infrared spectroscopy (FTIR) spectra. Optical band gap and Urbach energy were found from analysis of optical absorption spectra. Thermal studies were carried out by using Differential thermal analyzer (DTA) measurements.

8p tamynhan6 14-09-2020 11 1   Download

Heat shock proteins (HSPs) usually act as molecular chaperones to prevent proteins from being denatured in response to high temperature and other extreme conditions. These are highly conserved from prokaryotes to eukaryotes. In this study, we analysed the differential expression pattern of hsp21 and hsp70 transcript during thermal stress in tropical tasar silkworm. We found expression of hsp21 and hsp70 were upregulated ~2.5 and 4 folds respectively in the temperature treated larvae in comparison to the control larvae.

7p quenchua6 15-06-2020 14 1   Download

Polypropylene/ maleic anhydride /organic montmorillonite nanocomposites (PP/ MA/ Org-MMT) have been prepared via direct melt intercalation in an internal mixer. Maleic anhydride (MA) was used as a compatibilizer to improve the dispersability of the clay. The structures of nanocomposites have been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). Mechanical properties and thermal stability were determined by tensile analysis and thermogravimetric analysis (TGA), respectively.

8p 12120609 01-06-2020 17 2   Download

Although the growth rate of biophysical parameters can be strongly influenced by row orientation and temperature during different phenological stages in Rapeseed-Mustard cultivars but the dynamics of plant growth is not fully understood. Hence, a field experiment was conducted at the Research farm, School of Climate Change and Agricultural Meteorology, PAU, Ludhiana to characterize the dynamic growth pattern of biophysical parameters of three Brassica cultivars under different thermal environments and row orientation.

14p angicungduoc4 26-04-2020 5 0   Download

In this study, high temperature oxidation-resistant NiCr/Al duplex coatings on carbon steel substrate have been fabricated by electrical wire arc-spraying process. The oxidation resistance properties of NiCr/Al duplex coating system have been evaluated at 800 °C during retention times of 1.5, 3.0, 4.5 and 6.0 hours. The morphology and chemical composition of their cross-sectional structures were investigated using scanning electron microscopy coupled with energy dispersive spectroscopy (SEM/EDS).

10p kequaidan3 06-03-2020 24 0   Download

This work pointed out the preparation of a magnetic glass–ceramic in the system Fe2O3–ZnO–CaO–SiO2. The base composition was designed to crystallize about 60% magnetite. The influence of adding TiO2, Na2O and P2O5 separately or as mixtures was studied. The DTA of the glasses revealed a decrease in the thermal effects by adding P2O5, TiO2 and Na2O in an increasing order. The X-ray diffraction patterns showed the presence of nanometric magnetite crystals in a glassy matrix after cooling from the melting temperature.

9p kethamoi1 17-11-2019 24 1   Download

The differential thermal analysis of the quenched samples revealed decrease in the thermal effects by adding P2O5 and/or MnO2 to the base sample. The X-ray diffraction patterns show the development of nanometric magnetite crystals in a glassy matrix. Heat treatment at 800 C for 2 h, under reducing atmosphere, caused an increase in the amount of the crystallized magnetite with the appearance of minor hematite and Ca2SiO4. The transmission electron microscope revealed a crystallite size in the range 10–30 nm.

8p kethamoi1 17-11-2019 20 1   Download

Energy storage systems (ESSs) have experienced a very rapid growth in recent years and are expected to be a promising tool in order to improving power system reliability and being economically efficient. The ESSs possess many potential benefits in various areas in the electric power systems. One of the main benefits of an ESS, especially a bulk unit, relies on smoothing the load pattern by decreasing on-peak and increasing off-peak loads, known as load leveling. These devices require new methods and tools in order to model and optimize their effects in the power system studies.

13p kequaidan1 16-11-2019 12 0   Download

This article presents a new approach for estimating the depth, size, and metabolic heat generation rate of a tumour. For this purpose, the surface temperature distribution of a breast thermal image and the dynamic neural network was used. The research consisted of two steps: forward and inverse. For the forward section, a finite element model was created. The Pennes bio-heat equation was solved to find surface and depth temperature distributions. Data from the analysis, then, were used to train the dynamic neural network model (DNN).

11p kequaidan1 16-11-2019 11 2   Download

This paper reports on the synthesis and characterisation of Dy2 O3 -doped magnesium borate (MB) glasses containing different modifiers, lithium, calcium, and sodium oxides. Glasses composed of (70-z)B2 O3 -20Li2 O; CaO; Na2 O-10MgO-zDy2 O3 (where 0.05≤z≤0.7 mol%) were prepared using the melt-quenching method. X-ray diffraction (XRD) pattern of the as-quenched samples verified their amorphous character. Differential thermal analysis (DTA) confirmed excellent glass-forming ability and thermal stability in the range of 0.60-0.67 and 0.18- 0.82, respectively.

6p caygaocaolon1 13-11-2019 20 1   Download