Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: September 2017
Authors: Denis V. Tuntsev, Zulfiya G. Sattarova, I.M. Galiev
Based on these data, it was decided to create samples of products consisting of a surface layer based on wood flour, binder, modifier and inner or lower layer based on recycled thermoplastic polymer and sawdust
The presented data show that the cross-breaking strength of on average 18% higher is achieved with the formation of an internal layer based on PP.
Halitov, Modeling of a reduction zone of the gasifier installation, Materials Science and Engineering, 124, (2016) [4] D.V.
Luible, Investigations on ageing of wood-plastic composites for outdoor applications: A meta-analysis using empiric data derived from diverse weathering trials, Construction and Building Materials, 124 (2016) 1142-1152
Online since: March 2012
Authors: Min Zhang, Yu Xia Jane Qin, Dan Chen, Ping Yang
Introduction Ever since error theory was developed, which is always used to assess the results of any experiements, but less people pay attention to those data that they got true or not, which is hard to accurately recognized because of the presence of errors.
Using least squares method, standard curve equation was made according to the measured data[6]: A = 0.00556 m +0.0216, the correlation coefficient r = 0.9961.
The uncertainty component introduced by standard curve fitting is the largest one of the uncertainty components, therefore, to control standard curve preparation and the curve fitting method of the ginsenoside measurement is the best way to reduce the degree of uncertainty components, and the reduction of this component has the most obvious effect to reduce the measurement uncertainty of this method.
In this study, the Class A and Class B standard uncertainty were evaluated by classification, and the Class A and Class B were combined into the standard uncertainty and expanded uncertainty, this study provide a reference for further improving the reliability and consistency of test data in the laboratory.
Online since: February 2012
Authors: Hong Jie Chen
After developing all rules (rules for design constraints see fig.1, rules for selecting gear materials, rules for speed reduction, etc.), all this design knowledge can be adopted and captured as a knowledge database in the system.
After the reliability, maintainability, cost, initial gear tooth data have been calculated based on user-specked requirements, it is necessary to calculate the capacity of the gear sets.
A set of algorithms supplementing the FEA model would take the parameters, which define the geometry of the gear tooth together with data, which determines the mesh resolution and create a data file of nodal coordinates and element topologies in the format required by the analysis program.
Online since: March 2015
Authors: Magdalena Popczyk, B. Łosiewicz
Numerous methods have been developed for production of the Ni-P alloy coatings as vacuum deposition, chemical reduction also known as autocatalytic or electroless deposition, rapid quenching, melt spinning, vapor deposition, and electrodeposition.
The two-CPEs model was utilized for approximation of the ac impedance data [6-8].
As a result of approximation of the experimental data in the case of two-CPEs model the following parameters could be obtained: Rct1, T1, f1, Rct2, T2, f2, Rs, where Rct1 and Rct2 is charge transfer resistance related to high frequency (HF) and low frequency (LF) semicircle, respectively; T1 and T2 is capacitance parameter associated with HF and LF semicircle, respectively; and f1 and f2 is connected with HF and LF semicircle, respectively, and it takes the values £ 1 as a dimensionless exponent of the CPE related to the constant phase angle, a = 90°(1-f) (Tab. 2).
The EIS data were obtained on the Ni-P electrodes in the potential range corresponding to the linear part of the Tafel plots in which the steady-state conditions were ensured and kinetic parameters from the Tafel equation could be calculated (see Fig. 1 and Tab. 1).
Online since: August 2013
Authors: Li Jun Tang, Ning Wang, Yong Hong Zhang
According to the geological data, a construction scheme According to the geological conditions, pile spacing, selection of drilling rig, priority should be given to the selection of fast drilling equipment and casting equipment, such as sand, silt should not use the impact of drilling and reverse circulation drilling into rock, with roller drill or hammer drill.
Strengthen the management of Arrange the person in charge of construction, make self-inspection record, after each procedure must promptly notify the supervisory review, especially for the first root pile should be more fully ready, the buried depth of pile by geological conditions, equipment status, the first concrete quantity, catheter in pouring concrete in the focus of attention, at the same time for each root pile to collect field data and timely summary, both for the data of pile accident treatment provides better, and also provide a basis for the objective evaluation of the quality of pile foundation.
General should take measures to prevent this, on the crowded already inclined pile, the backward extrusion reduction method.
Online since: August 2006
Authors: G. Brustenga, R. Marsili, Michele Moretti, J. Pirisinu, Gian Luca Rossi
Many non contact measurement techniques have been proposed to solve these problems: for example in [1] a set of optical fiber probes, fixed on the turbine stator is proposed, in [2] a laser Doppler vibrometer with a rotating measurement point by using two mirrors is illustrated, while in [3] a laser vibrometer with a fixed measurement point and special purpose data processing techniques is proposed.
Typically data processing by the lock-in technique is performed, combining the output signal from the infrared detector with a reference signal for dynamic loading.
The velocity of the motor is controlled by a small low voltage drive interfaced to a computer and using a data acquisition board and relative software the rotational speed of the mechanical component can be measured. .
The strong reduction of the wake effect is clear and it is possible to see stress concentrations around the holes.
Online since: November 2007
Authors: G.W. Beckermann, N.J. Foreman, K.L. Pickering
Since the treated and untreated fibres experienced similar tensile loads, this increase in strength is thought to be due to the reduction in fibre diameter due to the removal of amorphous materials from the fibre cell wall.
It can also be seen that there are large standard deviations in this data, indicating that there were significant variations in Young's modulus between composite specimens during testing.
It should be noted that anomalies due to imperfect fibre wetting, imperfect alignment and imperfect fragmentation saturation were removed from the data, as done by Vlasveld et al. [2].
The critical aspect ratio (Lc/D) can be calculated from SFFT data using the following equation [2]: (1) where D is the average fibre diameter (23.6µm) and Lave/D is the arithmetic mean fibre aspect ratio.
Online since: September 2015
Authors: Chang Cheng Chen, Huey Lin Ho
Therefore, the mechanical properties within traditional macroscopic size do not properly be used, which imply that the impact will be increased while many of the traditional macroscopic size characteristics were neglected after size reduction.
According to those results, a reverse approach was used for checking its similar data to additionally establish a finite element simulation programs for the simulation of forming limit of sheet metal.
The experiment of micro curling process mainly made the curled geometry of specimen and measured the data of load and springback.
The load signal from loadcell and displacement signal from laser displacement sensor were captured by a data acquisition device to make a curve for expressing the relationship between the displacement and punch load.
Online since: May 2016
Authors: L. Zhao, Y. Zhang, K. Ma, G.Z. Mao
These data and the swelling kinetics parameters give lots of information for this material and allowing its application in a satisfactory way.
The XRD pattern of the starch-g-poly (acrylic acid) hydrogel (Fig.1 b) shows small peak at 19.8°and significant reduction in peak intensities was observed.
(a) (b) Fig.4 (a) Swelling kinetic curve and (b) t/Qt versus t plot for the starch-g-poly (acrylic acid) hydrogel Some of the characteristics collected from the swelling curves for evaluating the mechanism of the swelling phenomenon of hydrogels, the Schott’s pseudo second order swelling kinetics model [14] was adopted to fit the experimental data.
Q∞ and k were calculated by fitting experimental data shown in Fig.4 a,b to Eqs.(2),(3),(4).Depending on experimental date ,the plot of t/Qt versus for the starch-g-poly(acrylic acid) hydrogel give perfect straight line with good linear correlation coefficient(R2>0.98),indicating that the swelling process of the hydrogel follows the Schott swelling kinetic model.
Online since: April 2012
Authors: V.P. de Freitas, João M.P.Q. Delgado, A.S. Guimarães
All the calculations were done with climate data for Porto city provided by a software tool (METEOTEST 2008 [6]).
This program calculates hourly values of all parameters using a stochastic model and the resulting weather data files are produced in a variety of formats.
The weather data inputted to the model was temperature (º C), relative humidity (-), precipitation (mm/h) and global solar radiation in a horizontal surface (W/m²).
In Table 2 we present the shading factors values of building elements (reduction in the radiation effect) by horizontal and vertical obstacles, nearby the masonry wall in study.
Showing 25111 to 25120 of 40412 items