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Online since: July 2014
Authors: Arkadeb Banerjee, Sankar Dhar, Debasis Datta, Sanjib Acharyya, Nityananda Nayak
The analysis of the experimental data generates the model constants that are required as inputs during numerical simulation of dynamic events like armour impact using commercial FE codes.
B & n are determined by using a power law fit for the true stress and plastic strain data in the elastoplastic zone of the true stress – true strain curve.
The ABAQUS 6.10.1 commercial FE code has in-built option of elastoplastic material model that uses the experimental stress and plastic strain data of the material.
A drastic reduction in ductility is observed as the working temperature is increased.
A constitutive model and data for metals subjected to large strains, high strain rates and high temperatures.
Online since: December 2014
Authors: Lyudmila Boronina, Anna Aryasova, Ekaterina Kargapolova, Dmitry Anufriev
This research based on the following sources: - data of Federal Service of State Statistics of Russia (RosStat) and the Territorial Department of the Federal State Statistics Service of the Astrakhan region (AstrahanStat) for 2011-2013; - regulations of the Astrakhan region in the field of social development for the period of 2009-2013; - official data from websites of the Astrakhan region; - sociological studies in other regions of Russia (Karelia, Chuvashia, Vologda, Kursk, Smolensk, Tyumen, Ulyanovsk, Perm) which participate in the national program "Problems of socio-cultural evolution of Russian regions" (2006-2007), as well as nationwide monitoring "Values and interests of Russian population"(2006).
The empirical data of the research based on the results of the monitoring survey conducted by research groups led by E.V.
Access to data array was allowed by the Corresponding Member of Russian Academy of Sciences Nicolay Lapin.
The comparative analysis of the all-Russian and regional data was performed.
The data obtained create the necessity to research the effectiveness of current transformation and to optimize further institutional reforms.
Online since: July 2011
Authors: Moon G. Lee, Dong Kwon Kim, Jin Woo Lee, Kuen Tae Park, Hyun Jung Kim
From the experimental data, the effects of the vibration amplitude and the frequency on the thermal performance are discussed.
An Agilent Technology 34972A DAQ is used to acquire the signal from the thermocouple and convert them into the temperature data.
(a)L=100 mm (b) L=75 mm Fig. 4 Thermal resistances In Fig. 5, the thermal resistance reduction caused by vibrating the fins with the resonance frequency is presented for the two fins.
As shown in Fig. 5, despite the fact that the longer fin have lower resonant frequency, the longer fin shows more dramatic reduction of the thermal resistance compared to the shorter fin.
Fig. 5 Thermal resistance reduction caused by the vibration Conclusions In the present study, it was investigated how the vibration influences the thermal performance of the single fins.
Online since: February 2014
Authors: Masashi Kato, Masaya Ichimura, Yuto Mori
The absolute signal depends on the sample thickness, the distance between the waveguide and the sample and so on, and thus we focus on the slope of each data in the figure.
As shown in this figure, below photon density of 5´1013 cm-2, the m-PCD peak is proportional to the photon density for all the measurement conditions and also for data reported in ref. 5.
If origin (i) is dominant, the reduction of the total conductivity change will keep the proportionality up to a larger injected photon density.
By reduction of the total conductivity change, we can obtain the m-PCD peaks proportional to the injected photon densities even in the high injection condition.
Of course, the reduction of the total conductivity change decreases m-PCD signal intensities, and thus a lower limit of the measurable range in the injection photon density increases.
Online since: February 2014
Authors: Si Qin Chang, Ming Hai Xu, Liang Liu
With the benefits of Camless valvetrain, the low-end torque will be improved from 10% to 20% and the fuel economy will be increased by 16%-19%, as well as a substantially reduction of emission [6].
Engine modeling step: (1) study the main parameters of the engine to measure, collect the data and information.
The main parameters of the gasoline engine are shown in table 1. (2) Make the complexity of the actual engine broken into several easy to deal with the subsystem, and use of AVL Boost module to provide needs and establish the physical model. (3) According to thermodynamics, heat transfer, mass transfer of knowledge, the simple physical model of a quantitative mathematical description of the collected data and information input the engine module corresponding to them, which it is a mathematical model. (4) Use their model to establish the preliminary simulation.
They illustrate the comparison of camless engine equipped with EMVA and conventional engine, and highlights the reduction in pumping loss during part load that can be achieved ,theoretically.
Electromagnetic valve actuation system e-valve: convergence point between requirements of fuel economy and cost reduction.
Online since: February 2014
Authors: Zuraini Mohd Enggsa, Arfidian Rachman, Tri Suyono, M. Mehdi, Kamaruzzaman Sopian, Sohif Mat
This desiccant wheel is capable of condensing water at 0.05kgH2O/s and providing 3.3639 kW load reduction.
With this significant load reduction, the component integrated in solar hybrid desiccant air-conditioning system can perform comfort cooling to area with high latent load such as hall, hyper market and commercial building. 1.Introduction The emphasis on the design of energy efficient air conditioning systems for both industrial and comfort applications is becoming a priority in the light of continuing rise in energy demand, cost and the environmental problems most notably the climate change.
ADAM data acquisition has been used to do monitoring and recording of temperature, humidity, air flow rate in each stage of air process and also radiation intensity.
Fig.2 Sensible process of desiccant wheel Fig.3 Theoretical and experimental sensible dehumidification Fig.4 Dehumidification Sensible Effectiveness Theoretically, the value of absolute humidity 0.024 kgH2O/kgdry.air at dehumidification process result a reduction to 0.017 kgH2O/kgdry.air while the experimental value is 0.0167 kgH2O/kgdry.air.
Online since: June 2005
Authors: Mattison K. Ferber, Hua Tay Lin, S.M. Zemskova, A.J. Haynes
Data acquisition was computer controlled and included tracking and leak loads, loading ram displacement, thermocouple emf, and test time.
X-ray diffraction data for uncoated specimens after cyclic fatigue testing showed no phase changes.
X-ray diffraction data of uncoated sides of the specimens clearly indicated the presence of the crystoballite phase.
In contrast, X-ray diffraction data of mullite-coated specimens after the static fatigue test indicated mullite and Si3N4 as main phases and a crystoballite as a secondary phase.
Summary of the Flexure Tests Data on AS800.
Online since: June 2015
Authors: Evgeniy Ol’khovik
These data are used further for calculation on durability (service life).
They were checked data from X-ray tomography measurements of porosity in castings.
Using data about mechanical properties of cast steel, received by the results of tests control samples, which was cut out from casting test strips, impractical, because that identified indicators of mechanical properties of practically never been able to achieve in the body of the casting work piece.
Also, the processing of the experimental values are used and other data.
Change in the elastic modulus as a function of cast steel the amount shrinkage porosity, ○ - experimental data for low-alloy cast steel [12,13] With the volume of shrinkage porosity of 5-10% (corresponding to the walls of the casting with a thickness greater than 50 mm) is a significant reduction in the mechanical properties, for short-term indicators () is a reduction of up to 30%, and the fracture toughness () to 50%.
Online since: August 2019
Authors: Sergiy Budzulyak, Volodymyr Kotsyubynsky, Andrii Kachmar, Volodymyra Boychuk, Lyubov Yablon, Ivan Budzulyak, Bogdan Rachiy
The capacitance of model capacitors based on carbons obtained at different modes was calculated from both from cycling voltammetry and galvanostatic charge-discharge data.
Zview2 analytic software was used for impedance spectroscopy data analysis [23].
The equivalent circuit used for experimental impedance data fitting is presented in Fig. 7.
The fitted data for circuit elements calculated for zero bias potential are generalized in Table 2.
Maximal value of specific capacity (up to about 100 F/g) for carbons obtained at 600ºC corresponds to MC-075-600-2 sample which is consistent with CV data.
Online since: March 2012
Authors: Lv Gao Lin, Shu Qiong Chen, Xiao Tian Lv, Shen Shun Ying
The operational modal is analyzed using PolyMAX method with responsive data of key point in broaching machine, which is excited in practical broaching operation and tested by LMS SCADAIII-105 system.
At the end of the article, we summary and discuss the results of this work, and offer a proposal about optimization of physical construction and cutting velocity , in vibration damping and noise reduction of broaching machine, according to the existing analysis results.
The PolyMAX needs FRFs as primary data and identifies a right matrix-fraction model: (1) Where, is the FRF matrix containing the FRFs between all m input and all l outputs; is the numerator matrix polynomial and is the denominator matrix polynomial.
The polynomial coefficients and are assembled in following matrices: , (6) Choose in arbitrary frequency, equations can be formulated from the measured FRF data.
As the participation factors and the poles are estimated based on the polynomial, by consequence, equation [11] can be formulated from the measured FRF data in different frequency.
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