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Online since: September 2016
Authors: Magda Ruiz, Jabid Quiroga, John Quiroga, Luis Mujica, Rodolfo Villamizar
In this paper, a temperature robust alternative approach is being considered by using a PCA statistical data driven model of the guided wave pattern.
In general, it is reported a magnitude reduction when the temperature is increasing [4].
In SHM PCA-based, data is arranged in a matrix X as follows in Eq. 2 Χ=x11 …xi1x12 …xi2……… x1j …xij…xni …xn2 …… …xnj=ϑ1ϑ2…ϑj…ϑn
The first one is based on analyzing the residual data matrix to represent the variability of the data projection in the residual subspace.
The principal components (the first 60) are determined using the data of the extended baseline.
Online since: October 2013
Authors: Jana Šugárová, Peter Šugár, Ján Petrovič
This increases the possibilities in terms of large reductions and change in shape with less complex tooling and also reduces the required load capacity and cost of the forming machine.
For friction reduction and surface quality improvement the lubricant oil of type AVIA GLEITBAHNÖL RSU 220 has been applied.
Control factors and levels Parameter Sign Level 1 Level 2 Level 3 Spindle speed (min-1) n 300 600 900 Feed rate (mm/rev) f 1 1,5 2 Workpiece geometry (-) pm (1) radius R10 (2) conical area (3) cylindrical area Rolling direction of the sheet (deg) rd 0 45 90 Analysis of data Using Minitab 16 software, ANOVA (Analysis of Variance) was performed to determine which controlled process parameters and two-way interactions significantly affect the performance characteristics.
The LB (lower-the-better) type of S/N ratio (Signal-to-Noise ratio) was used for transforming the raw data in the case of residual stresses analysis (Eq. 1) and the HB (higher-the-better) type of S/N ratio was used in the case of surface microhardness analysis (Eq. 2): (1) (2) where n is number of measurements in a trial and yi is the ith measured value.
Fig. 3 Effects of process parameters on residual stresses (S/N data) b Fig. 4 Effects of process parameters on surface microhardness (S/N data) Table 3.
Online since: June 2010
Authors: Richard J. Callinan, C. White, John Wang
In the analysis the characteristic dimension has been set at mmb 05.20 for ballistic data.
For machined data two curves have been plotted.
Firstly mmb 3.20 satisfies the machined hole data of diameter 8mm and secondly mm bo 48.2 satisfies the machined hole data of 12.7mm diameter.
These results imply a difference in perforation diameter between the ballistic and machined hole data suggesting that the 7.62mm and 12.7mm ballistic perforations contain delaminations.
This testing data has allowed the formulation of a failure method to be proposed for such composites.
Online since: December 2014
Authors: Jana Knedlova, Martin Reznicek, Vladimír Pata, Libuše Sýkorová
A future trend seems to be a reduction of the product dimensions while keeping their product capabilities.
To get the maximal information of the measured data, 3D graphs in Matlab software were created.
The data is displayed scatter plots see Fig. 11 and 12.
According to the obtained data (groove depth, mean arithmetical deviation and maximal profile height) an optimum configuration of power and feed setting resulting in achieving of the desired values for surfaces machined with laser feed at 500 DPI and 1000 DPI.
An overview of statistical methods for data processing, Portal, Praha 2008, ISBN 80-7178-820-1
Online since: March 2015
Authors: Lin Xiang Yang, Xiao Qing Zeng
The data of queue length and the speed on the outlet is input into the optimal controller through sensor module.The optimal controller can realize optimal calculation based on the data detected and turn the preset scheme on.
(1) In the formula:L1: the distance from the saturation point to the stop line, S1:the saturation flow of the road,1:reduction factor of the upstream traffic going straight ahead affected by the steering vehicles,Lc:vehicle length,m1:number of the lanes,ge:effective green time of the intersection.
The demonstration project is evaluated by the methods of video recording and manual counting statistics.The evaluation parameters are the traffic flow, the traffic time, the average speed of vehicles, the queue length and the stop delay of the intersection.The assessment results are shown in the following: Through the investigation and data assessment,this paper compares the traffic flow before and after optimization.As is shown in Table 2, Table 3 and Table 4.
[3]GAO Linlin.Traffic State Estimation Using GPS/SCATS Data[D].Shanghai jiaotong University,2008
Project Report MIOH UTC TS4 2008-Final,Michigan Ohio University Transportation Center, December,2008 [5]JIANG Guiyan,LI Yi,DONG Shuo.Travel Time Estimation Method Using SCATS Traffic Data Based on k—NN Algorithm[J].Journal of Southwest University,2013,48(2):343-349.DOI:10.3969/ j.issn.0258-2724.2013.02.024.
Online since: January 2013
Authors: Xiao Lan Yang, Ji Feng Liu, Min Ping Jia, Fang Min Xv, Jing Chao Zou
In this way, it can be ensured the maximum vibration intensity at point E would not greater than the allowable value. 6) Overrun control settings: This program has the main parameters like vibration intensity overrun control functions, if the measured vibration intensity value beyond allowable value, the vibration mill would be stopped working; During the whole process, all vibration intensity and amplitude values ​​will be credited to the PLC memorizer, and the software process the corresponding data into charts automatically; It makes inspection and analysis of vibration effects more convenient.
Test and Analysis Debugging includes 4 stages: presetting values of program, data collection, data processing, and data analysis.
After data collection, it can be drawn into the vibration frequency, vibration intensity and amplitude versus time curve.
According to the analysis of measured data tables and curve diagram, the largest vibration intensity is 24, there is no overrun; Amplitude maximum is 21.5mm, and no overrun too.
It can be known from Fig.3 that the overrun of the maximum reduction functions in advanced control of measured and expected vibration intensity have been achieved, and does not appear vibration intensity overrun phenomenon, and it is proved that system with transient super-high vibration intensity has been controlled.
Online since: January 2013
Authors: Shi Yao, Pan Guang, Huang Qiao Gao
The experimental data of flow noise are few so does the simulation on flow noise.
The accuracy of this method was verified by comparison with experimental data.
The model has a complete hydrodynamic experimental data which obtained from the experiment that conducted at the China Ship Scientific Research Center.
It is seen from the Table 3 that the computation results agreed well with the experimental data.
[7] LiuHall-Lieh, Thamas T Huanh, Summary of DARPA SUBOFF experimental program data[R].
Online since: September 2013
Authors: Yong Li, Jie Li
Theoretically, the terminal can support the maximum downlink data rate of about 42Mbps.
For many data services which require higher data rate and shorter delay, such as video streaming and download services, the data rate provided by WCDMA system has been fare from satisfying the requirement of people [1].
MIMO can increase data rates with transmitting parallel data streams, which is used to improve system capacity and spectrum efficiency by improving data throughput on the downlink existing 5MHz carrier.
Four precoding weights are totally defined for to, the first data stream multiplies the weighting factors and, the second data stream multiplies the factor and.
Therefore, each antenna transmits a part of each data stream, two different data streams are transmitted on the same antenna, and the same data stream is transmitted through two different antennas simultaneously.
Online since: October 2011
Authors: Jia Long Ren, Jin Jing Ren, Yan Wang, Feng Lei Yu
The influence of cutting force and the cutting temperature using water vapour as the cooling lubricantion was investigated and compared through changing feeding data, feeding rate andcutting depth respectively.
Table 1 The tool geometry parameters Rake angle Clearance angle Tool cutting edge angle Angle of aileron deflection Side angle c 15° 6° 90° 15° ﹢3° Table 2 The cutting parameter used to the test Machining data Cutting rate Feeding data Depth of cut 30~70 0.1~0.3 0.5~2.5 Table 3 The parameters of lubrication condition Shoot to flow parameter Lubrication condition orifice size Vapour flow 125 150 18 2 Distilled water 20 —— —— —— Emulsion Test results.
Fig.1 of Cutting GH4169 Fig. 2 of cutting TC Fig. 3 of cutting Cr12 Other change chart can’t be expressed because of the limited space.Hard guilder alloy tool YT15, heat alloy GH4169,titanium alloy TC4 and stainless steel Cr12 were used in cutting test under the different cutting parameters(feeding data, feeding rate and cutting depth)and different lubrication conditions(distilled water, emulsion and water vapor ).
Its function of cooling and lubricant is more effective than cutting fluid, thus it relatively increases the reduction magnitude of cutting forces.
Thus compared with the distilled water, emulsion and dry cutting, when using water vapor for cooling lubricants, the reduction magnitude of cutting force is relatively small.
Online since: December 2012
Authors: Jie Liu
Chat 1 Inter-Company Supply Chain Practices Source: Manufacturing Manager Responses data Excellent global electronics company committed to supply chain integration (as seen in chat 1), supply chain breakthrough has realized in significant benefits (as seen in table 1).
The desired outcome is a win-win relationship where both parties benefit, and a reduction in time required for the design cycle and product development.
Also, the purchasing function develops rapid communication systems, such as electronic data interchange (EDI) and Internet linkage to convey possible requirements more rapidly.
Until end of September of 2008, the total users of China Mobile has more than 450 million, assets over 800 billion RMB Yuan, profit in the first three quarters of 2009 rose by 1.8%, all sort of financial data were higher than other MO.
Under the development for seven years, “Monte net” has been the appellation for all data business of China Mobile.
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