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Online since: December 2013
Authors: Yu Qin Ma, Li Guo Yang, Xiao Xu Fan, Yan Feng Liu
The thermal-chemistry conversion technology ,which utilizes high temperature to make organic substances in the sludge convert into high grade energy and eliminate bacteria, is regarded as the effective way of sludge reduction, harmless, resource processing[2].
Taking 1kg fuel as datum, the energy balance during combustion process is as shown in Fig.1.
With analysis data of materials properties are known, using Gibbs free energy minimization method to predict the gasification products, namely to solve a series values of in a certain temperature and pressure to make the value of G of this system is the minimum, namely to solve the minimal value of equation .
Online since: January 2022
Authors: Bouguettoucha Abdallah, Chebli Derradji, Aga Sarra, Djama Chaker, Amrane Abdeltif
Isotherm data were analyzed by four classical models, Langmuir and Freundlich with two parameters, Sips and Redlich-Peterson with three parameters.
For the classical models and in the case of the two parameters models the Langmuir one gives a better fit for the data isotherm according to the R2.
In the case of three parameters models, both Sips and Redlich-Peterson accurately described experimental data.
The pseudo-first-order PFO[45], the pseudo-second-order PSO[46], and the pseudo-nthorder PNO[47] models were used to fit experimental data.
Both pseudo order (PSO) and the pseudo nth order model (PNO) models were the most reliable to describe experimental data.
Online since: November 2005
Authors: Seong Sick Choen, Am Kee Kim, Md Anwarul Hasan, Hak Joo Lee
Nanoindentation data measured on the cell-wall of Al-alloy foams were analyzed to obtain the material properties of the cell wall.
Introduction The increasing demands for the improvement of crashworthiness of automotive vehicles, the ultimate goal being the increase of passenger safety and reduction of vehicle damage during accident, have given rise to a growing interest in the Al-alloy foams.
But the essential ingredients in the development and use of numerical tools for handling a new engineering material are the good constitutive model for that material, the existence of reliable methods for extracting information about the properties of that material and the availability of data in literature validating the numerical codes.
ii) FE Simulation of Nanoindentation: using the FE code ABAQUS to construct the stress-strain curve of cell wall material based on the nanoindentation load-indentation data.
The load and displacement was monitored by a computer, equipped with a data acquisition system.
Online since: December 2019
Authors: Angelos P. Markopoulos, Vasilios Dimitriou, Michael Tatarakis, Nektarios A. Papadogiannis, Yannis Orphanos, M. Bakarezos, A. Skoulakis, K. Kosma, I. Fitilis, E. Clark, T. Papadoulis, Evaggelos Kaselouris
A good agreement between the experimental data and the simulation results is found.
The main feature of the LAM process is the reduction of the cutting forces via increasing the temperature of the workpiece to reduce the strength of the material.
A good agreement between the experimental data and the simulation results is found.
The thermomechanical properties of the metal workpieces were selected according to literature data, accompanied with the J-C material model and failure parameters, while thermal conductivity, specific heat, thermal expansion and emissivity are considered temperature-dependent [3,6,11,12].
The readings of the temperature values from the thermocouple sensors are acquired by our data acquisition system.
Online since: September 2014
Authors: An Min Zhang
Through data analysis, the areas of the die that cracked easily or showed heavy wear were identified.
Because of diameter reduction of the product, the metal forms a cone with a 13° gradient and a radius of 40 mm in the same direction as that of the movement of the punch.
The data obtained are used for calculations.
Interface temperature/K Sliding velocity /() Interface pressure /MPa Vickers hardness Wear coefficient / Sliding length /mm Wear depth /mm P1 691 0.104 667 339.33 22.73 0.0104 0.465 P2 702 0.211 653 336.64 23.23 0.0211 0.951 P3 700 0.910 651 337.12 23.15 0.0910 4.068 P4 686 1.38 625 340.58 22.56 0.138 5.713 P5 747 2.83 530 326.24 25.05 0.283 11.52 P6 716 4.98 280 333.30 23.81 0.498 9.961 P7 751 5.92 81 325.36 25.21 0.592 3.715 P8 777 6.35 30.9 319.81 26.21 0.635 1.608 Based on the above data, the curve of wear depth in female die in the last step of analysis was acquired (Fig. 11).
Online since: January 2012
Authors: Xiao Mei Zhang, Bing Jun Li, Chun Hua He
Based on sectional data regarding income and expenditure of Henan urban residents from 2006 to 2009, this paper applies ELES model to have a quantitative analysis of consumption expenditure structure of Henan urban and rural residents, involving three aspects including marginal propensity to consume, demand income elasticity and price elasticity.
Let (2) Then formulae (1)can be expressed as (3) By the aid of cross-sectional data regarding income and consumption, we can use Ordinary least squares to get the estimate value of parameters and in formulae (3).
The reflecting programme of demand change of certain commodity or service to its price change is called self-price elasticity of that commodity or service, with calculation formula as follows: (5) Analysis of Change in Consumption Structure of Henan Urban and Rural Residents Analysis of Marginal Propensity to Consume of Henan Urban and Rural Residents Based on data regarding income and expenditure of urban and rural residents as per income bracket in recent years as referred to Henan Statistical Yearbook, and it can be yielded marginal propensity to consume of all consumption expenditures of residents in 2006 to 2009 (Table 1 and 2).
Departments at central level and of Henan Province need to adopt measures to improve the current income distribution, reduce as much as possible the income differential between different income groups, especially guaranteeing no-longer reduction of income level of medium and low income groups, in this way, when satisfied with primary demand, residents may have more ample money spent in other expenditure such that the level of consumption of Henan urban and rural residents as a whole can be improved.
Online since: March 2006
Authors: Janusz Nowotny, Graeme E. Murch, Faruque M. Hossain, L. Sheppard
Apart from the formation energy of the Ti vacancies (where experimental data do not exist) our calculated results of the defect formation energies are in fair agreement with the experimental results and the defect energy levels consistently support the experimental observations.
Hence, efforts have been made to increase the visible light sensitivity through band gap reduction [3,4] or by introducing defect energy levels in the form of intermediate bands.
The possibility of band gap reduction using extrinsic doping with lattice matched foreign atoms has been reported in the literature, but those doped materials suffer from thermal instability and introduced higher carrier recombination centers.
These theoretical results provide fundamental data for further calculations on how the isolated energy bands form and/or how the band gap can be reduced via the interaction of intrinsic defect complexes.
Online since: April 2005
Authors: Gregory P. Thomes, Thomas J. Wagener, James F. Weygand
., Chaska, MN 55318, USA a thomas.wagener@fsi-intl.com Keywords: Particle Removal, Non-Damaging, Yield Enhancement, Defect Reduction, Cryogenic Aerosols, Argon Aerosols, Nitrogen Aerosols, Low-K Dielectrics, Poly-Silicon Lines.
Data obtained by Phased Doppler Particle Analysis (PDPA), shown in Figure 2c, also show this trend of decreasing aerosol size with a decrease in chamber pressure.
Online since: June 2013
Authors: Ling Feng Li
The upper flange plane of the tubinghead spool is the datum level for calculating the distance between the master bushing and the tubing hanger and the well depth data.
Material analysis for environment-assisted fracture and stress corrosion on wellhead assembly Environment-assisted fracture may be generated in surface assembly because of reduction of the physical and mechanical properties(especially the toughness) of material due to some chemical components or elements.
Online since: January 2016
Authors: Mario Trotea, Gheorghe Popa Mitroi, Augustin Constantinescu
It was analyzed the current conditions of public passenger transport, measurements were carried out on the route and questionings of passengers used to establish input data for optimization.
Analyzing the data in Table 1 it is observed that the distances between stations vary from a minimum of 200 meters to a maximum of 1100 meters, and the average distance between stations is approximately 600 meters.
It follows that Tuc = tuc· C = constant where: tuc - is the average ascent and descent for a traveler and is equal in the analysis path tuc =2 sec/passenger and C – is the total number of passengers for a voyage which, according to data obtained by measurements on the route during peak hours, C = 200 passengers .
The compensation of this reduction commercial speed can be done by traffic flow, reducing the time of ascent and descent of passengers, etc.
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