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Online since: November 2012
Authors: Ling Zhao, Dan Shen, Tie Jun Ma
The influences of factors such as particle filling ratio, particle mass ratio and initial deviation displacement on the damping effect are discussed by means of test data.
The non-obstructive particle damping (NOPD) technology provides a new way of cable vibration reduction.
The vibration data of the experiments were collected by DASP system and analyzed to obtain the structural damping ratios of the wire.
According to the test data, the relation curves between the damping ratio of the wire under different particle filling ratios and the initial deviation displacement are drawn in Fig.2 for the two diameters of iron powders filled in the f6 tube.
It is noted by comparing the curves in Fig.3 with those in Fig.4 that between the data for two diameters of tubes there exists significant difference in the relation curves of damping change with filling ratio but much better conformity in the ascending part of the relation curves of damping change with mass ratio.
Online since: February 2012
Authors: Łukasz Łach, Dmytro S. Svyetlichnyy
Results of the modeling of the process by finite element method (FEM) are input data for further simulation by FCA.
The simulation of the microstructure evolution can be conducted for arbitrary points (for which the appropriate data is available) in an arbitrary forming process, on the basis of the calculation by an arbitrary FEM code.
The time, temperature and strain rate tensor in the data file are needed for the simulation by FCA.
Sequential reduction in direction y, x and y in three passes with elongation in the rolling direction z can be seen.
The further studies will be focused on the modeling of real material and verification by comparison of simulation results with experimental data.
Online since: February 2018
Authors: Hee Jung Byun, Yan Pung Zheng, Sang Jun Choi, Su Goog Shon
Our proposed method uses to identify live lines with very small power high frequency signal injection based on data communication technology.
When confusion for phases and wires occurs, disproportionate concentrations of loads can easily occur, and this type of disproportionate concentration of loads can cause phase unbalance that can lead to power loss or power failures and, further, equipment failures due to excessive voltage regulation or reduction of useful life, etc.
Proposal of the New Phase and Transformer Identification System Power Line Communication (PLC) is a technology that exchanges data via the AC electric power line.
Data is sent on the power lines by superposing a modulated high-frequency carrier signal on the line voltage, AC or DC.
In order to transmit or receive data from the electric power line, connect a live line with PLC modems through the coupling circuit as shown in Fig. 2.
Online since: August 2012
Authors: Wai Ki Ching, Xi Chen, Li Min Li, Hao Jiang
The availability of protein structure data in Protein Data Bank (PDB) allows us to conduct gene function analysis based on protein structure data.
We note that this type of data transformation has a problem: significant information might be lost, being easily implied by the fact that we cannot reproduce the original data from the transformed data.
After data processing, we finally get 578 human genes and their corresponding PDB IDs.
Suppose a set of data points is given, we then define the similarity matrix of the data points, as a measure of their similarity.
The idea of spectral clustering is to make use of the spectrum of the similarity of the data to perform dimensionality reduction for clustering in lower dimensions.
Online since: November 2011
Authors: Ke Qiang Ren, Hai Ying Jiang
Tile-part is stored in a tile of the coding information and the corresponding compressed data, it consists of two parts: tile-part header and tile-part stream data.
Structure of marker segment Kakadu system Construction of Kakadu system Kakadu core code consists of three subsystems: coding parameter subsystem, compressed data and structure subsystem, processing engine subsystem.
The application sends encoding parameters, decoding parameters and compressed data structure to compressed data and structure subsystem, the subsystem forms component slice, resolution, code block and so on, and then JPEG2000 data blocks are sent to the processing engine subsystem.
After the processing engine subsystem processes the data, it may choose the method of data stream preservation which saves in memory or outputs in document.
The processing engine subsystem carries out data compression and data decompression, and wavelet transformation, quantization, block coding and other operations are combined into a complete data processing engine.
Online since: July 2013
Authors: Lei Sang, Duo Long
Data-centered Routing Protocol Directed diffusion routing protocol is typical data-centered routing protocol based on query.
According to different demands, an aggregation node defines query or interest request message that demands data service, and broadcasts to the sensor node.
When information of interest reaches the source node, the source node transmits the data along the established gradient to the aggregation node.
And data are collected in the pathway, thus the best aggregation tree is obtained. 2.
If the signal power received is more than threshold value of received power, then the data is received successively.
Online since: October 2008
Authors: Claudio Testani, Roberto Montanari, T. Valente, Riccardo Donnini, Paolo Deodati
When indentation test is carried out with a penetration rate of 1.7 x 10 -3 mm s-1 or lower, it is possible to compare directly indentation data with those of tensile tests made with a strain rate of 10-3 s-1; in these conditions the yield stress σy ≅ pY/3.
The relationship has been verified for a lot of pure metals, alloys and composite materials; the relative difference, ∆ = (σY − pY/3) / σY , between pY/3 values coming from indentation curves and σY values from tensile tests does not exceed 7% , i.e. it is similar to data scattering observed in different tensile tests on the same material [14].
However, for the treatment times considered here, such reduction is very small.
Data of fatigue tests on the composite in as-fabricated condition and heat treated for 100 and 1,000 hours at 600 °C.
Fatigue data and interpolation curve. 3,0 3,6 4,2 4,8 5,4 6,0 0,001 0,002 0,003 0,004 0,005 0,006 600°C, 1000 hours 600°C, 100 hours As - fabricated εεεεmax Log(Nf) Conclusions The main results can be summarized as follows. 1 - FIMEC tests show that yield stress of the composite is always higher than that of the matrix alloy even if the difference becomes progressively smaller as temperature increases.
Online since: June 2013
Authors: Janis Zicans, Remo Merijs Meri, Ingars Reinholds, Valdis Kalkis, Tatjana Ivanova, Ilze Elksnite
Results of calorimetric data were calculated by applied software METTLER Graph Ware TA72 PS. 5.
The data are summarized in Table 1.
Table 1 DSC data of the 2nd heating scan of the synthesized LCC and the commercial analogue LCC Tgt [°C] Ton [°C] Tmax [°C] Toff [°C] ΔH [J/g] PET 40/ ABA 60 60.0 172.9 204.5 228.2 3.24 rPET40/ ABA 60 62.4 155.9 198.5 229.4 6.24 Characterization of rPET/LCC blends.
As known, main reason for effective reduction of viscosities, and hence, facilitated processing, is existence of LCP inclusions in the nematic state with a critical concentration globally oriented in the flow direction [7].
Chai, Flow induced chain alignment and disentanglement as the viscosity reduction mechanism within TLCP/HDPE blends, Polymer 42 (2001) 7847-7856
Online since: March 2014
Authors: Zhi Yong Hao, Ping Song, Wei Tao Zhang, Zhi Luo
To meet the stringent emissions regulations, diesel engines must have a significant reduction in NOx emissions[1-3] .
In the range of 80~120kg/h of gas path flow, when volatility increases by 0.8 to 1.2mm, the reduced amount of gas line outlet temperature increases from 5.0 ℃ to 7.2 ℃, volatility increased to 1.6 by the 1.2mm, the reduction of the amount of gas line outlet temperature increased to be 2.9 to 4.5 ℃.Within 80~120kg/h of gas path flow range, when volatility increases by0.8mm to 1.2mm, the increasing loss of a large number of gas line pressure is reduced to39.7% from the 37.5% increase wave away from the 1.2mm to 1.6 mm, the increase in gas line pressure loss by a 23.4% increase to a large number of 23.6%.
When the parameters are stable,measurement can be realized through the computer, data acquisition, data processing and results demonstrate.
The principle of the test system is shown in Figure 6. 1.Combustion furnace 2.combustorcasing 3.bypass solenoid valve 4.manual shut-off valve 5.electric heater6.electromagnetic regulator 7.thermal gas mass flow meter 8.differential pressure transmitter 9.pressure transmitter 10.differential pressure transmitter 11,12,13,14,23.temperature sensor 15.cooling water thermostat system 16,17.pressure sensor 18.manual shut-off valve 19.fuel tank20.EGR cooler 21.PLC and data acquisition system 22.solenoid valve 24.water flow meter Fig.6.
Simulation results of the EGR cooler (K) (L/min) (K) (bar) (kg/h) (bar) (kPa) (kPa) (K) 368 20 836 2.1 91 1.6 20 10 472 368 25 836 2.1 90 1.6 20 14 468 368 30 836 2.1 90 1.6 20 19 463 368 35 836 2.1 90 1.6 20 28 461 According to Table 1 and Table2, the critical data, EGR outlet gas temperature, the overall heat transfer coefficient and coolant flow curve are plotted into figure 7.
Online since: May 2014
Authors: O. Vázquez-Gómez, E. López-Martínez, H.J. Vergara-Hernández, L. Olmos, Bernardo Hernández-Morales
The transformation kinetics data were correlated using an Avrami-type equation.
Regarding heating cycle design, Jaason et al. [2] studied the influence of furnace temperature, heating time, layer thickness and part geometry on the quality of heat treated seatbelt tongues fabricated with C60E steel because the optimal furnace settings for austenitizing result in a reduction in the global processing cost.
The data may be conveniently presented in a continuous heating transformation (CHT) diagram which is akin to the well-known CCT diagrams.
From dilatometric test data the critical temperatures were determined and CHT diagrams were constructed.
The data acquisition frequency was adjusted such that the temperature was registered in intervals no larger than 1 °C; thus a datum was collected every 1.5, 3, 6 and 30 s for heating rates of 40, 20, 10 and 2 °C/min.
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