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Online since: July 2014
Authors: Hui Jie Zheng, Wei Quan
The measurement method was developed by scanning multiple gas absorption lines and fitting the experiment data with Lorentz profile to obtain the density.
The density gradient would be obtained by scanning multiple alkali metal absorption lines and fitting the experiment data with Lorentz profile discretized.
According to the lambert-beer law [8-10], the reduction in laser intensity is (1) Where represents the incident light, the absorption cross section at frequency of , the position in the cell.
The gas number density of alkali vapor is given (3) 2.2 The discretization strategy On the basis of Eq. (1), the reduction is sensitive to the gas number density of alkali vapor.
Online since: October 2014
Authors: Yan Hong Liu, Qiang Li
SVM can do well with less data but is computationally expensive while GMM is computationally inexpensive but needs more data to perform adequately.
SVM is a kind of classification algorithm that has a good generalization performance to classify unseen data.
SVM is one of the most robust classifiers in speaker recognition since it has strong classification capability on small sample data.
The more data from a speaker is available, the better the identification performance is.
UBM is trained with the EM algorithm from hours of speech data gathered from lots of speakers.
Online since: September 2012
Authors: T.E. Cowan, W. Skorupa, Jakub Čížek, Gerhard Brauer, J. Kuriplach, D. Grambole, H. Schmidt, I. Procházka, W. Anwand
H-plasma treatment causes a significant reduction in concentration of these complexes.
Comparison of recent ab-initio calculations with experimental PAS data suggested that HTG ZnO single crystals contain Zn-vacancy + hydrogen (VZn+1H) complexes [1].
Experimental PAS data were interpreted using ab-initio theoretical calculations of positron parameters.
The concentration of VZn+1H complexes in the virgin HTG ZnO crystal cannot be calculated from LT data due to saturated positron trapping, but it can be estimated from the positron diffusion length determined by SPIS
Although there is a significant difference in the vertical position of calculated HMP profiles and experimental curves, the features predicted in theoretical calculations can be qualitatively seen in experimental data.
Online since: December 2013
Authors: Ta Chung Yang, Sheng Shian Tsai
The cavity between the microperforated plate and the back plate also provides resonant effects for noise reduction.
If double layers of microperforated plates are used, wide frequency ranges of noise reduction can be achieved [2].
Compared with the total noise level of condition (2), a significant noise reduction of 33dBA is achieved.
Data analysis is performed using a commercial software of statistics.
The S/N ratio is defined as (1) where is the experimental data, is the data number,is the standard deviation.
Online since: December 2011
Authors: Zhao Mei Wang, Kai Jun Xiao, Jian Yong Wu
Data was processed with the MAS OPTION Software.
In the first 1 min (0~1 min), a sharp reduction of hSP occurred with a reduction rate of 51%.
It suggested that low ultrasonic power was favorable for the reduction of viscosity in consideration of energy saving.
A B C D Fig. 1 Effect of ultrasound irradiation duration on the association of EPS in aqueous solution Note:DLS data were collected without filtration for samples.
Note:Data are shown for native and ultrasonic irradiated EPS solutions several days after filtration with 450 nm pore size filters.
Online since: September 2013
Authors: Cheng Jiang Zhang, Zheng Qi Xu, Hao Song
Results and discussion The profile measured on site in field is as thick as 31.52m and has 85 layer. 82 radioactive spots are actually measured on site. 410 γ energy spectrum data are obtained and the statistic results are listed in Table 1.
Content(10-6) URa 18.39 6.77 9.67 1.75 Th 28.5 0.08 13.55 1.76 K(%) 2.95 0.47 1.80 0.25 External irradiation ratio Ir 1.1 0.26 0.67 0.06 Internal irradiation ratio Ira 1.14 0.42 0.60 0.11 γ energy spectrum geophysical profile maps of Xigeda Formation are made according to the actual measurement data for URa, Th, K, Ir and Ira.
The black in the figure represents the reduction environment and the grey represents the oxidation environment.
The figure clearly shows that the data got by γ energy spectrum measurement have obvious regularity and the stratums can generally be divided into 22 layer and 6 macro cycles.
Generally speaking, the bottom is of reduction environment (blue gray, thin granularity) and the top is of oxidation environment (gray yellow, thick granularity).
Online since: October 2015
Authors: Ciprian Jitea, Daniela Rus, Tiberiu Csaszar, Emilian Ghicioi, Attila Kovacs, Edward Gheorghiosu, Gabriel Dragos Vasilescu
The document for safety to professional vibration – overview Data and information included in the document for safety to professional vibration The evaluation of risk of exposure to professional vibration, regarding the increasing of occupational safety rate, for the economic agents whose activities are performed in the presence of sources generating vibrations, can be accomplished through “The document for safety to professional vibration’’, comprising the following sections [1,2,5]: Document name and date: ‘’The document for safety to professional vibration’’ (DSVP) from DD/MM/YYYY; Applicant: The beneficiary of order and/ or the subscriber of the contract regarding the assessment of risk of exposure to professional vibration or the beneficiary of order and/ or the subscriber of the contract regarding the assessment of risk of exposure to global vibration; - Address: Data and information regarding the applicants location and/ or work place where it will be performed the evaluation
containing the procedure for analysis and assessment of vibration risk; - List of control to vibration: A list containing questions regarding the review of activities performed in the presence of sources generating vibration; - Declared values of vibration on work equipment located at the analyzed work places: The name of the section comprising sequences regarding the work places for which the risk assessment is done (job name; declared value of specific vibration of equipment; limit values of exposure in accordance with the applicable regulations; observations on the workers time of exposure to vibration) and the flowchart for performing an assessment for risk to exposure on vibrations, in accordance with the regulations; - Chart of risk of exposure to professional vibrations: Graphical representation of risk levels regarding the exposure to professional vibration using the iso-curves of risk (equal level curves); - Matrix of estimation and assessment of risk of exposure to vibration: Data
Start Analyze of vibration The evaluation of exposure to vibration The control of vibration 2,5¸5 m/s2 > 2,5 m/s2 < 2,5 m/s2 End The vibration reduction > 5 m/s2 Fig.1.
Start Analyze of vibration The evaluation of exposure to vibration The control of vibration 0,5¸1,15 m/s2(9,1¸21 m/s1,75) > 0,5 m/s2(9,1 m/s1,75) End The vibration reduction > 1,15 m/s2(21 m/s1,75) < 0,5 m/s2(9,1 m/s1,75) m/s1,75) Fig.2.
Program of prevention and reduction of risk to vibration Avoiding or reducing the exposure to vibration Yes No 1.
Online since: March 2017
Authors: Muhammad Farooq, Anita Ramli
Hydrogen Temperature-Programmed Reduction Analysis.
The low temperature reduction peak at 548 oC is attributed to the reduction of highly dispersed Mo species (Mo6+ to Mo4+) [8, 9].
The first reduction peak in the TPR profile of each catalyst was due to the reduction of highly dispersed Mo6+ species into the Mo species of lower oxidation states.
The reduction peak at higher temperature is attributed to the reduction of Mo species formed in the first reduction step such as Mo4+→Mo and Mo species strongly bonded to the support along with the partial reduction of the support species [6, 13].
The TPR data shows that the reduction temperature peak maxima increases with increasing the CeO2 loading into the γ-Al2O3 support, indicating strong metal-support interaction as compared to the Mo/γ-Al2O3 catalyst.
Online since: February 2011
Authors: Cha Xiu Guo, Xin Li Wei
However there is little experimental data available in the open literature.
It is also worth noting that the reduction of the plastic collapse load is affected by the length and depth of the crack.
Compared with the experimental data, the calculated results are smaller since it did not consider the ovalisation of the elbow, but the maximum error is within 10%.
The following conclusions can be drawn: (a) For the defect free, from the experimental load–deflection data, plastic collapse load is evaluated by twice elastic slope method and compared with the existing formula; comparison between them is quite satisfactory.
(c)All the analytical validations provide confidence to the present test data, which may be utilized in future for validation of new theoretical developments in the integrity assessment methodology of axially surface cracked elbows.
Online since: July 2015
Authors: Rauf S. Iskhakov, Evgeniy V. Eremin, Oksana Anatoljevna Li, Sergey Viktorovich Komogortsev, Lidia Aleksandrovna Chekanova
In this paper we have proposed a modified expression for the fitting M(T) data in Co-P powders with nanocorundum and nanodiamond precipitates.
The obtained Bloch constant is in good agreement with literature data.
Fitting the experimental data with the Bloch’s T 3/2 law allows one to calculate the exchange interaction constant of the material [2–7].
Experimental M(T) data for the samples I and II were fitted by Eq.4.
Iskhakov, Analysis of phase composition of Co-P alloy powders using magnetometric data, Phys.
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