Search Options

Sort by:

Publication Type:

Open access:

Publication Date:

Periodicals:

Search results

Online since: December 2012
Authors: Shen Li Chen, Dun Ying Shu
The prediction results are compared with experiment data obtained from actual devices, we found that the different value of real experiment data and estimation data from the GM(1,1) is small and a good agreement has been obtained.
At the first, make the original experimental Vth data acted as input, afterward the grey prediction model we can get the output.
A considerable well agreement has been obtained, see Figs 5 and 6, as comparing the prediction results and the experiment data.
The measured Vth data versus channel length.
The measured Vth data versus channel width.
Online since: September 2011
Authors: M. Azharul Karim, Mubarak Aljuhani, Ray Duplock, Prasad Yarlagadda
The results reported in this paper are based on data collected from a survey using a standard questionnaire administered to 120 manufacturers in Saudi Arabia.
The questionnaire was used to collect data from related industries in Saudi Arabia.
For example correlation between comprehensive lean implementation and inventory reduction is 0.613 at significance level 0 (p=0.00).
Data analyses were conducted using two analysis programs, namely SPSS for Windows (version 18.0) and CART from Salford Systems (version 6.0).
From data analysis, results and findings are documented and discussed.
Online since: May 2011
Authors: An Cheng, Hui Mi Hsu, Sao Jeng Chao, Li Ying Lee, Hao Hsien Chen, Zhi Wen Hong
The result also indicates that the annual reduction of ITS value for an area similar to the study area may be taken as approximately 11% (33.14/3 %) and 4.7% (13.98/3 %) for the conditions of high traffic flow and low traffic flow, respectively.
Document all the data preparation needs that will be required in order to execute the test cases.
This may include items such as how databases should be populated, or production data will be used for next step.
This consistency is characterized by a stream of data falling within control limit.
These control limits are chosen so that almost all of the data points will fall within these limits as long as the process remains in-control.
Online since: March 2007
Authors: Oscar Ruano, Michael E. Kassner, Maria Teresa Pérez-Prado, Ling Jiang, F. Salort
A coarse grained Zr-Hf alloy has been subjected to one rolling pass with different thickness reductions ranging from 10% to 80%.
Texture data must be interpreted with caution since, due to the large grain size of the starting microstructure, the number of grains measured may not be enough to have a good statistics.
First, when applying reductions equal to 50% or smaller, significant twinning occurs.
Microstructure of the Zr-Hf alloy processed via one rolling pass at room temperature with (a) 10%, (b) 30%, (c) 50%, and (d) 80% thickness reduction.
X-ray macrotexture of the Zr-Hf alloy processed via one rolling pass with 80% reduction at (a) liquid nitrogen temperature, (b) RT, and (c) 300ºC.
Online since: August 2013
Authors: En Guang Zhang
The reduction in the weight of platen means the reduction in the cost of injection molding machine.
The reduction in the weight of platen means the reduction in the cost of injection molding machine[1].
As the modeling, the finite element analysis and the optimization design are performed in the same software, the seamless connection of CAD/CAE can be achieved, which ensures the unity of data and improves the editability of model.
Online since: January 2012
Authors: Yong Hong, Jun Gang Wang
With shear rate increasing, both the peak strengths and the post-peak strength reduction become greater.
According to the data of deformation and pore pressure measured during the tests, there are two patterns of causing the strain softening of the silty clay.
In the case of post-peak strength reduction, the values in the tests of 1cm/s are 45% and 65% respectively greater than those obtained in 0.1cm/s and 0.01cm/s tests.
Consequently, it can be supposed that there maybe two probable patterns of the post-peak strength reduction of the silty clay in this study.
The higher shear rate tests are usually accompanied with greater peak strength and higher post-peak reduction in shear stress.
Online since: March 2011
Authors: Yue E Chen, Bai Li Ren
A new reduction strategy is proposed for training support vector machines.
Sample set select Adult data set of UCI[13], Adult data set has been widely used to test the classification algorithm.
Adult data sets totally divided into nine groups, we use the a5a, a6a data sets to do the experiment, the sample is 123-dimensional vector.
Table 1 shows the experimental results on a5a and a6a data sets.
When the order of magnitude of data sets between 103-105, we generally take for the experience value, for the data set which the order of magnitude greater than 105, can reduce the values of r.
Online since: September 2014
Authors: Shu Li, Lin Zhang
Multidisciplinary Optimization of Helicopter Gearbox Housing Structural Vibration Based on ARSM Lin Zhang 1,a, Shu Li 2,b 1Large Aircraft Advanced Training Centre, Beihang University, Beijing 100191, China 2School of Aeronautic Science and Engineering, Beihang University, Beijing 100191, China azhanglin_buaa@163.com, blishu@buaa.edu.cn Keywords: Vibration reduction; Frequency response; Sensitivity; Orthogonal experimental design; Adaptive response surface method.
Besides, in the process of vibration reduction, structural stress and mass have to meet the design requirements.
It can obtain an approximate expression of the system by way of data fitting.
Table 1 Shell Thicknesses of Gearbox Housing Variable t1 t2 t3 t5 t7 t9 t10 t11 t12 Original Thickness[m] 0.0120 0.010 0.035 0.020 0.008 0.012 0.010 0.008 0.030 New Thickness[m] 0.010 0.008 0.045 0.019 0.005 0.027 0.007 0.005 0.034 Variable t13 t14 t15 t16 t17 t18 t19 t20 t24 Original Thickness[m] 0.027 0.032 0.022 0.036 0.008 0.032 0.020 0.023 0.030 New Thickness[m] 0.028 0.005 0.019 0.047 0.041 0.044 0.007 0.010 0.046 Fig.7 Iteration Process of Objective Fig.8 Contrast of Maximum Nodal Response Summary This paper provides a feasible methodology for the vibration reduction of helicopter gearbox housing in engineering.
The structural vibration and element stress have been optimized in obvious reduction without weight cost.
Online since: December 2011
Authors: Xuan Liu, Min Li, Peng Xin Liu
With these, the product design and manufacturing cycle has shown time reduction [1].
The data combined system is available for scanned view registration, data reduction, and data merging etc.
Data Registration In a combined method, data collection using a touch probe and an optical scanning probe must be transformed into one common coordinate system.
Data Merging When the registration has been performed, the data from a touch probe overlaps with the triangular mesh model.
The high accuracy data of locating feature holes is preserved, and the overlap region of triangular mesh is removal by data merging, as shown in Fig.3(e).
Online since: September 2013
Authors: M.S. Abdul Majid, M. Afendi, R. Daud, A.G. Gibson, M. Hekman
Experimental data showed that the UEWS point varies for each winding angle, and the difference becomes even more pronounced, especially when the angles deviated from the ideal ±55°.
Nonetheless, the weeping stress at final failure for pipe samples with winding angle of ±57.5° exhibits notable reduction by almost 14% from 233MPa to 201MPa.
The UEWS strength was observed to degrade at winding angles of ±42° and ±73°, yielding over 40% reduction for both cases.
The comparison of the experimental strain data and those computed through laminate theory is presented in Table 2 below and graphically in Figure 2; Table 2 : Comparison of experimental data with lamination theory   Experimental data Lamination Theory (All values calculated at experimental UEWS test results!)
Fig. 2 : Comparison between UEWS experimental data and Tsai Wu failure criterion Conclusions Effects of various winding angles in biaxial UEWS tests were investigated.
Showing 3931 to 3940 of 40290 items