Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: October 2010
Authors: B. De Filippo, L. Campanella, A. Brotzu, S. Natali, D. Ferro
The results will be used as input data for the validation of a mathematical model, that simulate corrosion process on bronze surfaces as a function of specific environmental condition.
After 5 exposition cycle (Fig. 6) it appears as a compact layer with an average thickness of about 15 µm The EDS analysis carried out in several zone of this compact patina highlight that it is composed principally by copper-sulphuroxygen compounds confirming that the XRD data which indicate Brochantite (copper hydroxysulphates) as principal compound forming the corrosion patina.
The L*, a* and b* parameters rapidly decrease after the first cycles, after this point the reduction trend begins lower.
They reflect the light less than a pure metal , and furthermore the corroded surface is rough and this yields to a further light reflection reduction.
All the data obtained are also interesting to better understand all the corrosion mechanisms which brings to bronze surface degradation.
Online since: January 2013
Authors: Chun Tung Chen
Literature Review Research Process and Analysis The study acquired knowledge on the characteristics of folding chairs and quality function deployment in addition to the applications through literature review and data collection.
The data show that most public using folding chair at home emphasize more on the coordination between the folding chair and the environment.
The data were summarized into the importance analysis of demand quality as shown in (Table 3-2).
The second layer consisted of “structural and form integrity design,” “new color conversion and use,” “aesthetics in chair reinforcement,” “No screws used,” “use plastic elasticity for assembly,” “handle design,” “latch for easy stacking,” “flat surface required after folding,” “Sufficient seat reinforcement,” “Use sliders or pullers to prevent pinching,” “appropriate arch and angle of chair back,” “dimension of seat,” “appropriate angle and contour,” “appropriate height of seat,” “appropriate back height,” “parts can be dissembled and recycled,” and “part reduction.”
Finally in terms of environmental protection, although the rise of green awareness in recent years have urged people to enhance their concepts of environmental product, the survey in contrast did not discover consumers emphasizing more on the reduction of materials and recycling materials for reuse as expected.
Online since: April 2013
Authors: Abdul Rahman Abdul Rahim, Noordin Mohd Yusof, Adnan Hj. Bakri
With this philosophy, it is possible to produce a variety of products with a minimum of inventory and the lowest level of quality defects .JIT leads to many operational benefits such as the reduction of work-in-process inventory, the reduction of floor space required, the reduction of manufacturing lead time, an increase in worker productivity and increase in inventory turnover [18].
[3] Al-Najjar,B. (1996), Total quality maintenance : an approach for continuous reduction in costs of quality , Journal of Quality in Maintenance Engineering, Vol. 2 No.3 , pp 4-20
[4] Amoako-Gyampah, K., Gargeya, V., (2001), Just-in-time manufacturing in Ghana, Industrial Management & Data Systems, Vol. 101 Iss: 3 pp. 106 – 113
[10] Canel,C., Rosen,D., Anderson,E., (2000),Just-in-time is not just for manufacturing: a service perspective, Industrial Management & Data Systems, Vol. 100 Iss: 2 pp. 51 - 60 [11] Dale, B.
,Cua, K.O., (1999), Total productive maintenance : a contextual view, Journal of Operations Management , Vol .17, pp 123-144 [26] Mould,G., King,M., (1995),"Just-in-time implementation in the Scottish electronics industry", Industrial Management & Data Systems, Vol. 95 Iss: 9 pp. 17 - 22 [27] Nakajima, S (1988): Introduction to TPM, Productivity Press, Cambridge, MA
Online since: August 2019
Authors: Rustam E. Siregar, Fitrilawati Fitrilawati, Annisa Aprilia, Lusi Safriani, Fitri Yuliasari, Vika Marcelina, Yeni Wahyuni Hartati
Many methods of GO reduction have been introduced and extensively studied by many researchers [7].
This statement is correlated with the data from current-voltage measurement shown in Fig. 5.
Fig. 6 Experimental data (solid line) versus fitting J-V curve (marked curve) extract from single diode model equation.
Resulted fitting curved vs. raw data from I-V characterization is shown in Fig. 6.
[6] Pei S, Cheng H-M, The reduction of graphene oxide, Carbon. 50 (2011) 3210-3228
Online since: January 2017
Authors: Yan Bing Zhang, Xi Zhu, Yong Qing Li, Bo Tong
In order to better use the damping vibration reduction technology, the multi-layer structure has been widely concerned by scholars0.
In order to check the accuracy and reliability of the measured data, firstly the relationship between the complex modulus of the measured data and the loss factor is drawn, as shown in Figure 6, in which the horizontal coordinates represent the logarithmic of complex modulus and longitudinal coordinates represent the loss factor.
The curve presents inverted U shape, which indicates the dispersion of the data has meet the basic requirements.
Finite Element Reduced Order Model for Noise and Vibration Reduction of Double Sandwich Panels Using Shunted Piezoelectric Patches[J].Applied Acoustics, 2015
Vibration Damping and Noise Reduction Performance Analysis of Brace with Elastic Interlayer [J].
Online since: June 2021
Authors: Henry Hlatshwayo, Noor A. Ahmed, Nkosinathi Madushele
Then the model was validated using vibration data acquired from a centrifugal pump on full load.
The network was found to be effective in classifying non-linear functions, noisy, and incomplete data.
Twelve cases were investigated from two different test-rigs, the technique estimated the physical size of the spall with average errors of the order of 12% (with data acquired from German Aerospace Center’s test-rig) and 13% (with data obtained from the University of New South Wales’ test-rigs) and maximum bounds in the order of 24% (with data acquired from German Aerospace Center’s test-rig) and 22% (with data obtained from the University of New South Wales’ test-rigs).
And in condition monitoring application, kurtosis is a preferred over CF due to its immunity to false data caused by statistical inconsequential noise [33]. 3.2.2.2 Frequency-domain Data Time domain data is transformed using fast Fourier Transform (FFT) to digital data (frequency domain).
Vasquez, A review on data-driven fault severity assessment in rolling bearings, Mech.
Online since: August 2011
Authors: Xiao Li, Lin Liang Yin, Sheng Tao Zhang
Nevertheless, the experimental data of the entire concentration range were not in line with the adsorption isotherm with constant parameters.
In such situation, we tried to divide the whole experimental data into two sections and fit each section individually.
Nevertheless, after reaching a definite concentration value, 400mg/L with a maximum inhibitive efficiency about 60%, the subsequent increase of inhibitor concentration results in a reduction of protective effect.
Fig.2 Fitting results of experimental data by Langmuir, Frumkin and Temkin isotherm in the entire concentration range Obviously from Fig.2, in the whole interval of the inhibitor concentration range, none of the three general isotherms are suitable for the adsorption of tinidazole on steel surface.
Conclusion Owing to the incompetence of the constant-parameter Langmuir, Temkin, or Frumkin isotherm in interpreting the adsorption behavior of tinidazole on steel surface in the entire concentration range, A two-section model based on Temkin isotherm was proposed to fit all the experimental data to clarify the adsorption of tinidazole on the steel surface.
Online since: February 2012
Authors: Bing Chen, Jing Yang, Shu Hao Liu
(3) Mesh refinement and load application To eliminate fluctuation influence of the shear force when shear fractures and to make simulation data closer to the actual, mesh refinement is needed which is shown in Fig 2.
Actual data and analysis of past shows that the boundary point between cutting layer and tear layer lies in 1/5 to 1/3 of the line ab, so extracting feature points at the surrounding area and by comparing the stress values and material yield stress[3].
[Table1] The coincidence degree condition Group Number Plate Thickness/mm Tension Force(Y)/N Speed(Y)/mm/s Gap/mm Coincidence Degree /mm 3A 2.82 -1000 -300 0.24 0.25 3B 2.82 -1000 -300 0.24 0.3 3C 2.82 -1000 -300 0.24 0.35 3D 2.82 -1000 -300 0.24 0.4 3E 2.82 -1000 -300 0.24 0.45 3F 2.82 -1000 -300 0.24 0.5 3G 2.82 -1000 -300 0.24 0.55 Through the above simulation conditions in Table 1, data concluded is shown in Fig 7.
Therefore, when other factors can be taken into account fully, reducing coincidence degree can improve the ratio of cutting layer and enhance the quality of shearing effectively [4][5]. 2) Influence of section levels from Clearance Table 3 is established form the above data.
In addation, gaping reduction could improve quality.
Online since: January 2013
Authors: Hai Peng Pan, Hao Feng
Substantial lead time reduction can not be expected under present circumstances.
In other words, the main task is to solve the problem of data exchange and data sharing.
Data level is the database server.
All data are stored in the database server.
All the data in ORACLE databases can be accessed via ODBC and JDBC interfaces by using JAVA.
Online since: October 2011
Authors: Gui Lin Lu, Xun Lei Wu, Zi Bo Li, Ji Hai Yang
Study on First-principles of Nano-materials named Manganese Oxide GuiLin Lu1, a, XunLei2, Zibo Li3, Yang Ji-hai4 1GuangXi University of Technology, No. 268 Donghuan Road, LiuZhou,China,545006 2Institute of Electronics, Chinese Academy of Sciences, Beijing,China, 100190 3GuangXi University of Technology-LUSHAN COLLEGE 4Department of Electronic Science and Technology,USTC ae-mail: lifishspirit@126.com Keywords- Clusters; giant magnetic phenomena; giant magnetoresistance; Density functional theory; Wavelet analysis Abstract—The physical properties of nano- Mn3O4 is Characterize by theory base clusters of Physical Chemistry, Including the lattice structure, catalytic properties, the phenomenon of giant magnetic and giant magnetoresistance, N dimensional wave function is approximation to be expressed as variational parameters of nonlinear multivariate function by Density Functional Theory, Extreme functional is obtained by Wavelet analysis ,And analyzed the data characteristics
Lattice oxygen ion diffusion in the bulk phase soon, will not make changes in the structure of spinel, indicating that lattice oxygen concentration and reactivity are also changing, when the lattice diffusion to the active site involved in the process of providing oxygen , due to the surface bonding state and the electronic states with different internal surface oxygen atoms missing location led to increased activity of the surface, with the reduction of particle size, surface uneven atomic level, so comparison with bulk materials, improved catalytic activity.
We get : Because the two-scale equations have the recursion relations of the frequency domain type: Therefore formula (8) value characteristic of its value can be used to illustrate the wavelet transform, This value by the wavelet transform to reduce the processing temperature and the Curie temperature near the experimental deviation of magnetic behavior, the data for the description of the space lattice inversion asymmetry has crucial significance.
Summary: The structure of nano-Mn3O4 material is not the same structure with a single, but diverse, as experienced during the formation of a lot of pressure, the internal distortion of the original materials can be high, shift cycle was a lot of damage, which deviate from the ideal large lattice region, with the particle size reduction, the surface of non-chemical equilibrium, coordination chemistry of non-integer value, the emergence of many active sites, these phenomena can no longer rely on traditional theories of crystal materials, nano materials must be to analyze the structural characteristics of its physical and chemical properties.
Showing 9831 to 9840 of 40353 items