Search results

The vibration acceleration signal has been collected using the IEPE sensor and data acquisition card, experimental results verified the accuracy of the vibration model, and weak impact signal caused by the belt relaxation was distinguished, that testify the practicability of the CWT method in belt relaxation feature recognition.
Experimental Platform An experimental platform using IEPE acceleration sensor and data acquisition card has been established.
As is shown in Fig.1 and Fig.2, the experimental platform composed of robot and IEPE acceleration sensors and data acquisition card and computer, acceleration sensors are tied to the engine or other measuring points, data acquisition card collects the sensors signals and communicates with computer by USB.
[6] Maj J B, Royackers L, Moonen M.SVD-based optimal filtering for noise reduction in dual microphone hearing aids; a real time implementation and perceptual evaluation[J].IEEE Transactions on Biomedical Enginee-ring,2005,52(9):1563-1573

The results of numerical simulations using real data reveal that the proposed method can determine suitable sample lengths while maintaining reproduction performance.
We propose a method of obtaining a suitable length of impulse response from the data directly for a multichannel sound reproduction system.
Since the solution becomes underdetermined if there is no rank reduction, the generalized Moore-Penrose (MP) inverse matrix with the least norm solution (LNS) is used.
The amount of energy attenuation of the signal is calculated from the waveform using the square integrating method [6], which is defined for a discrete-time signal as follows: s2k=n=0N-1gn2-l=1kgl2 , (6) where s2(k) is the ensemble mean of the reverberation curve, N is the data length of the impulse response g(n) that contains silent part, and k is the time index for deciding the amount of energy attenuation.
To investigate the effect of the proposed method, numerical simulations were carried out with real environmental data of three rooms with different reverberations.

The research can provide useful data for improvement of metal cutting technology and tool cutting performance.
It can provide valuable analytical data of the process.
It also has a convenient graphic user interface for data input and result observation.
On the other side, the increase of leads to the reduction of deformation coefficient and the principal cutting force.
By simulation using different cutting parameters, the influence of the cutting parameters on the cutting force is studied, which provides useful data for the improvement of metal cutting technology and tool cutting performance.

Results from data analysis found that knowledge on recycling is one of the factors affects the activity of the recycling program.
Only twenty nine close questions were analysed using data transformation, data exploration, Testing One mean and Comparing Means of Two Populations (Independent samples t-test), One-Way Analysis of Variance (one-way ANOVA) and Relationship among Variables of Statistical Package for Social Science (SPSS) version 11.0 and one open-ended question it just to know the opinion of the community about recycling.
Poon: The attitudes of Guangzhou citizens on waste reduction and environmental issues.
[3] R.D.E Young: Recycling as appropriate behavior: a review of suevey data from selected recycling education programs in Michigan.

The welding deformation trends of the 304 stainless steels with different thickness stay the same in a certain range of processing parameters in terms of data collected from the experiment.
The Parameter data for experiment set-up are shown in Tab. 2.
Tab. 2 Parameter data for experiment Parameter 0.5 mm 0.8 mm 1.0 mm Current/A 81~97 118~134 145~180 Pulse duration/ms 4.5~9 6~10 9~12.5 Frequency /Hz 2~5 2~5 2~5 Result and discussion The effect of welding current on welding deformation.
(a) (b) (c) Fig. 3 Effect of laser pulse duration on welding deformation (a) 0.5 mm base metals, I=87A, f=3Hz, (b) 0.8 mm base metals, I=124A, f=3Hz, (c) 1.0 mm base metals, I=160A, f=3Hz There is an inverse relationship between the pulse duration and the power density, thus the increment of pulse duration means the reduction of power density and the extension to the irradiate time of specimens in each pulse.
Based on the data from the experiment, the welding deformation trends of the 304 stainless steels with different thickness stay the same in a certain range of processing parameters.

The reduction in the strengths of the alloy treated at 350˚C for two hours should be at least attributed partly to the absence of the magnesium-based intermetallic phase.
All samples were loaded to fracture at room temperature at a strain rate of 1x10-3/s on an Instron universal testing machine (Model 8562) with a computerized data acquisition system.
Tensile properties, including ultimate tensile strength (UTS), yield strength (YS) and elongation at fracture (Ef%), were computed from the data recorded by a data acquisition system.
The reduction in the strengths of the alloy treated at 350˚C for two hours should be at least attributed partly to the absence of the magnesium-based intermetallic phase.

The intermittent data between stages are latched by using multiplexer based latches.
In this paper, conventional registers are replaced with multiplexer based latches for power reduction and a novel communication protocol based on Nios II processor is proposed to arbitrate data between asynchronously pipelined stages.
When a stage is processing a data, their respective control circuit also enabled.
· The ON time and OFF time of the select pulse are adjusted to receive new data from data in and to latch the previous data from data out.
A set of sample data and corresponding results are stored in a memory.

In general, both models of the knee prosthesis and reinforced by a stress reduction system (cement, elastomer) gave a lower stress level in the tibia and tibial bone of a normal person compared to a healthy model.
These data were used to create a three dimensional computer aided design (3D CAD) model in order to import into Ansys workbenche 16.2 software for FEA.
The anatomy of the model was created from magnetic resonance images, and the biomechanical characteristics used in the model were based on experimental data available in the literature.
On the other hand, the four knee prostheses (Model I, Model II, Model III, Model IV) implanted by elastomer contribute significantly to the reduction of stresses in the patella bone compared to the Intact Model.
On the other hand, the four knee prostheses (Model I, Model II, Model III, Model IV) implanted by elastomer contribute significantly to the reduction of stresses in the patella bone compared to the Intact Model.

The finite element results were validated by comparison with experimental data.
It was found that the predictions are in good agreement with the FEM data.
Instead, sufficient input–output data sets for training and testing are required.
A number of 107 data sets were used in the training phase, 19 data sets to validate the ANN model produced in the training phase and 19 data sets to perform the testing of the network.
This means that the regression line fits well the data, R2 values being closer to 1.

There are adequate data and results in earlier inquiry reports to comprehend the influence of operational conditions on cylindrical roller bearings cage slip.
After reaching the shaft's self-weight of 135N, the radial load was progressively decreased to that value while a data logger recorded the velocities of the inner race, cage, and roller.
This results in a lower specific load (the load-bearing by each individual roller), as well as a corresponding reduction in the amount of deformation.
The contact breadth was found by applying the same data to Eq. 5 and Eq. 6.
Hollowness between 0% and 40% results in a linear reduction in contact pressure.