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Online since: February 2013
Authors: Wen Tong Yang, Chun Hua Guo, Zhi Min Zhang, Zhifeng Liu
Nowadays, the requirements of reduction of noise and increase of the endurance of the gear drives make the design of Klingelnberg spiral bevel gear drives very challenging.
The goals of the performed investigation are: (i) the improvement of the bearing contact, (ii) obtainment of a favorable shape of the function of transmission error, and (iii) reduction of the magnitude of transmission error as the precondition of reduction of noise and vibrations.
[7] Klingelnberg Company, KN 3028 standard, Calculation of Machine Setting Data: Bevel GearGenerating
Online since: July 2004
Authors: Mamoun Muhammed, Do-Kyung Kim, Young Keun Jeong, Yun Suk Jo, Kyung Ja Kim
In-situ reduction of Au nanoparticles on particles' surface.
The in-situ reduction was carried out as proposed by Kim et al. [4].
BSA-loaded PNIPAAm-PDLA sphere PLLA-PEG@PNIPAAm-PDLA Self-assembly of Au nanoparticles by in-situ reduction Heating above the LCST Surface treatment with APTMS BSA-loaded 'shell-in-shell' micellar structure Emulsion in 'O/W2' phase Emulsion in 'W1/O' phase Oil phase containing PNIPAAmPDLA O PNIPAAm-PDLA micelles + PLLA-PEG W2 O W1 O W1 O W2 W1 O W2 W1 W2 Fig. 1.
Schematic illustrations of the fabrication of Au@PLLA-PEG@PNIPAAm-PDLA The data from QELS particlesizer shows that PNIPAAm-PDLA spheres with a mean diameter of 104 nm and PLLA-PEG@PNIPAAm-PDLA with a mean diameter of 112 nm have been obtained while maintaining a monomodal size distribution.
Online since: November 2012
Authors: Xiao Di Zhu, Hong Lin Wu, Zhen Yu Liu, De Jian Xu, Zhong Long Li, Hong Jiang Gu
By ultrasonic testing data analysis, in the fully peeling zone, the thickness of surface damage layer was in the range of 10 to 20mm.
In the view of statics analysis, reduction of mechanical properties before and after fire includes two aspects: reduction of the strength of concrete and steel and reduction of overall stiffness.
Online since: May 2011
Authors: Marzieh Kadivar, Mohammad Mehdi Nabavi, Mohammad Reza Kadivar, Mohammad Foroughi
For each data, three cubic specimens were tested.
This reduction of holes, according to Eq. 1, increases compressive strength.
The reason for this reduction of resistance is difficulty of mixing fibers and mortar, and consequently creating a heterogeneous mixture.
Results indicate that adding cellulose fibers with silica nanoparticles somewhat compensate the reduction of the resistance created by the fibers.
Online since: September 2013
Authors: Jim Jui Min Lin, Kuang Hung Cheng
Woodard et al. [5] investigated the implementation of a waste reduction program in southern England, and found that it accounted for a rapid decrease in waste quantities, from 18.1 kg to 8.2 kg per household per week (a reduction rate of 55%).
Data produced by complete sampling tend to be more precise and representative.
Mandatory garbage sorting (MGS), recyclable source sorting (RSS), and household food waste recycling are very important policies for resource reuse and waste volume reduction.
Online since: March 2014
Authors: Wei Pan, Qun Wang, Bin Pang, Xue Cheng Hou, Zhi Xue Qu
The first is in situ reduction sintering.
This may be attributed to the water vapors produced during the reduction of Ni2O3 by H2.
The remarkable feature of the data is that the real and imaginary parts of the permeability almost increase linearly with the increasing content of Ni.
For the first method in situ reduction sintering, almost homogeneous composites were obtained but with a low density.
Online since: April 2015
Authors: Mohd Nazree B. Derman, Tulus Ikhsan Nasution, Irwana Nainggolan, Devi Shantini Chandrasakaran
Introduction In the past few years, research on organic and polymeric materials as media for optoelectronic device such as optical information transmission, optical data storage, and processing has dramatically increased [1].
The reduction in band gap energy value indicates that spinach-ferredoxin has improved the optical properties of the film in which less energy is needed for the electron to flow within the films.
Hence, it creates an extra pathway for the electron flow within the films where it contributes to reduction in band gap energy which is consistent with the results depicted in Fig 2.
The reduction in optical band gap values indicates that Cs and Cs-Fdx films have a good potential to be used in optical applications.
Online since: October 2016
Authors: Abdellah El Barkany, Ahmed El Biyaali, Hassana Mahfoud
In traditional reliability models, asset’s lifetime is assessed using unique failure time data.
However, in these previous studies, parameter estimation was obtained by using simulation data, subjective data, or a combination of subjective data and objective data, mainly because of the lack of maintenance data.
Consequently, the parameters of the DTM could be predicted based on sufficient objective data.
The proposed model (14) was simulated in Matlab using real data of two identical systems.
Jardine, “Reliability analysis of maintenance data for complex medical devices,” Qual.
Online since: April 2007
Authors: Christiane Jaouen, Gregory Abadias, Aurelien Debelle, Anny Michel
The data relative to the IBS superlattices are reported in fig.3.a for the Mo sub-layers and Fig.3.b for the Ni sublayers.
After ion irradiation, a significant stress reduction is observed for both directions but the splitting of the in-plane lattice parameters remains unaltered.
The whole set of data (as-grown + irradiated states) was fitted using a triaxial model which includes, in addition to σhyd and σfix contributions, the coherency stresses 001cohσ and 110cohσ .
For Mo, data have been measured for the φ=0 and 90° directions.
For Mo, data have been measured for the φ=0, 35.26° and 90° directions.
Online since: February 2011
Authors: Sahari B. Barkawi, J. Mai Nursherida, A.A. Nuraini
The CAD model of the bumper was first created using CATIA software and the data was imported and the surfaces were created and meshed using LS-DYNA V971 software.
Material E11 (GPa) E22 (GPa) E33 (GPa) G12 (GPa) G13 (GPa) G23 (GPa) υ12 υ13 υ23 ρ (kg/m3) E-glass/epoxy 44.6 13.4 13.4 4.4 4.4 5.0 0.317 0.317 0.342 2040 Carbon/epoxy 150.7 13.3 13.3 4.9 4.9 4.8 0.287 0.287 0.390 1554 Table 4 Result Comparison No Bumper Beam Material Fiber Configuration Thickness of each layer(mm) Total Thickness (mm) Internal Energy (kJ) Specific Energy Absorption (kJ/kg) Mass (kg) Mass reduction compared with steel (%) 1 Steel Isotropic N/A 1.2 3.76 1.405 2.676 0 2 AA5182 Isotropic N/A 1.6 3.38 2.798 1.208 54.86 3 AA5182 Isotropic N/A 1.8 3.84 2.826 1.359 49.22 4 AA5182 Isotropic N/A 2.0 4.27 2.828 1.510 43.57 5 Glass A [0o/60o] S 0.5 2.0 4.01 3.481 1.152 56.95 6 Glass B [0o/30o/60o] S 0.4 2.1 4.26 3.521 1.210 54.78 7 Glass C [0o/30o/60o/90o] S 0.3 2.4 4.88 3.531 1.382 48.36 8 Carbon A [0o/60o] S 0.5 2.0 4.95 5.638 0.878 67.19 9 Carbon B [0o/30o/60o] S 0.4 2.1 5.03 5.461 0.921 65.58 10 Carbon C [0o/30o/60o/90o] S 0.3 2.4 5.68 5.394 1.053 60.65
In carbon epoxy bumper (Carbon A) the maximum weight reduction is 67.2% compared with steel bumper mass as shown in Table 4.
Carbon/epoxy composite bumper reduced the bumper mass with 67.2% of weight reduction and has highest value of SEA with 5.638 kJ/kg followed by e- glass composite bumper with 3.531 kJ/kg of SEA. 2.
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