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Online since: April 2009
Authors: Zbigniew Skorupka, R. Kajka, R. Harla, W. Kowalski, M. Parafiniak, M. Kacprzak, G. Balcerkiewicz, J. Pacholski, W. Lechniak
The dynamic tests of the shock absorber were executed on the object which static profile is showed on the graph below (profile Pr_810, fig. 10) 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 0 100 200 300 400 500 600 700 800 900 data file = pr_810.DAT graph file =810_pg.GRF MAGNETOREOLOGICAL FLUID BASED SHOCK ABSORBER PROTOTYPE SHOCK ABSORBHER STATIC CHARACTERISTIC Deflection (Ua [mm]) 0 50 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 charging pressure p= 0.9 MPa +/- 0.05MPa temperature = +24C humidity = 29% 29.08.2007 Vertical Force (F [daN]) Test date: Test stand: 40/20T press Fig. 10.
There is no need of using additional control system because every modern airplane is equipped in on board power sources and computers that can be used as control electronics. 11,8% load reduction was achieved as the result of MRF use in shock absorber.
Reduction was enough to conclude that shock absorber designs based on MRF could be made in future.
Online since: October 2017
Authors: Hai Jiao Wei, Guo Fang Wu, Fu Hong Zhang, Jiao Xue, Kun Sheng Zhou, Xue Feng Yang
Based on the above analysis, this paper simulated the butterfly valve to analyze the change of butterfly plate back vortex in different variation, and the change of sound pressure variation after the fluid flowing through the butterfly plate, to provide the related theory of reduction and optimization designing of valve noise used FLUENT fluid mechanics analysis software.
This analysis obtained the correlation between flow and vortex and provided a basic theoretical on designing valve in noise reduction.
Algorithms Data Anal. 14(1) (2009) 349-363
Online since: July 2017
Authors: Gabriele Milani, Gabriel Stockdale
With regards to the behavior of the analyses, three distinct failure modes were observed and are reflected in the data presented in Table 1 and Fig. 4.
Taking this ductile consideration and its typical 10% design strength reduction, and comparing it to the shear failure of the full FRP system and the 30% design strength reduction typical with shear, an outcome exists where the partial reinforcement of the system is stronger in design than the fully reinforced one.
Online since: September 2020
Authors: Nawadon Petchwattana, Paramaporn Kerdsap, Benjatham Sukkaneewat
After that, they were taken out and dried in a vacuum oven at 50°C for 48 h and the data of the weights of the dried samples were collected.
This was due to the reduction of macromolecular chain cohesion induced by plasticizer [6,9].
The sudden reduction in the E’ values due to the higher PVC chain mobility.
Online since: August 2005
Authors: Yu Kui Wang, Bo Yan Song, Wan Sheng Zhao
The higher switching frequency leads to a great increase in system response speed and a great reduction in weight and size.
The machining parameters are shown in Table 1 Parameter data discharge duration ton 400µs pulse interval toff 100µs high voltage 250V up-down height 4mm machining duration 4s server reference voltage 40V flushing no the work-piece 5Ge15 the electrode copper, 20*20mm Power Factor Test.
The full-bridge phase shift resonant converter based on machining current closed-loop control contributes to the great increase in its efficiency and the great reduction of its weight and size.
Online since: October 2014
Authors: Mircea Neagoe, Olimpiu Munteanu, Radu G. Saulescu, Bogdan Burduhos
Based on these data, further is presented an algorithm for the geometrical synthesis of a linkage reducer (Fig. 4b, c) ensuring control of the output linear speed up to .
The reduction of the rocker’s stroke y and the output speed is obtained by increasing the length of the fixed base (by increasing kl) and reducing eccentricity (by decreasing ke).
Angle j30 variation for a set of values of non-dimensional parameter kl and: a) ke = 0.25; b) ke = 0. 5; c) ke = 0.75; d) ke = 1 Conclusions This paper presents a new high performance variant of a low-speed linear actuator consisting on a AC/DC motor, a linkage reducer with two output counter-rotating backstopping couplings and an irreversible screw-nut transmission, that: brings a significant structural and constructive simplification and an implicit cost reduction by replacing the planetary gear reducer used in the known LSLA with a linkage reducer; allows a constant or adjustable transmission ratio, continuously or stepwise, and implicit an output speed control until to a predefined maximum speed; ensures a better precision for the stepwise orientation of concentrated solar converters, that require small angular movements in short glimpse of time for accurate tracking of the sun; ensures two-ways movements of the linear actuator, by reversing the way of movement direction by activating
Online since: April 2009
Authors: S. Harnsoongnoen, Chiranut Sa-Ngiamsak, Apirat Siritaratiwat
Introduction Recently, phase change memory (PCM) has been considered an one of the best candidates for nextgeneration nonvolatile memories (NVMs) due to its better properties comparing with previous conventional NVMs such as fast access time, low power consumption, low cost, high endurance, high scalability, and good data retention [1, 2].
Further reduction of a reset current can be attained by setting a chalcogenide material with much higher resistivity than a resistive heater [9].
(b) The CCTMI structure can offer a reduction of the NBC reset current by 44%.
Online since: October 2010
Authors: Hong Wei Cheng, Xiong Gang Lu, Wei Zhong Ding
The goals of this work are to study the calcination temperature and Al2O3 content effect on coke formation over Ni/Al2O3-MgO by monitoring the TEM image and analyzing the TG data of used catalysts and to determine the adequate calcination temperature and Al2O3 content in Al2O3-promoted Ni/MgO catalysts with high activity and coke resistance in steam reforming of COG.
To further evaluate the effect of Al2O3 content on carbon formation over the used catalysts, the amount of carbon deposition was examined by the thermogravimetric temperature-programmed oxidiation (TG-TPO) and thermogravimetric temperature-programmed reduction (TG-TPR) experiments [3], as shown in Table 2.
This could be attributed to the relative reduction of the CH4 amount in the feed gas at the given GHSV.
Online since: July 2012
Authors: Ji Hong Wu, Ting Wei Chen
Reduction type quantified formula is as follows: Incremental quantified formula is as follows: (4) Resource QoS quantized two-dimensional matrix as: Q=(,) (5) The proportion of the resources of the indicators you can use the weights, where k = 1, 2, 3.
Incremental-type indicators Reduction-type indicators (9) After quantification, the quality of service for each sub-request: (10) Three hierarchical resource scheduling.
Only consider here the isolation of the resource scheduling, data isolation, storage, segregation did not involve, resources to be indexed structure also increases the space overhead
Online since: April 2004
Authors: S.W. Jung, C.K. Jung, S.I. Huh, Kyung Seop Han
SCORING EXPERIMENT The data of the scoring experiment were obtained from POSCO Technical Research Laboratories.
The average reduction ratio of the opening force is around 4.5% at this condition.
As a result of many considerations, the score condition of steel Can End that the opening force is similar to aluminum End is as follows: panel thickness(0.20mm), residual thickness (0.10mm), (a) Opening force as residual thickness (b) Opening force as thickness ratio Fig. 7 Comparison of the Opening Force Fig. 8 (a) Change of the score angle Fig. 8 (b) Reduction ratio of the opening force by changing of the score width Fig. 8 Change of the score shape 15 450 0.08 0.10 0.12 0.14 0.16 200 250 300 350 400 450 500 Opening Force (N) Residual Thickness (mm) tp=0.16mm tp=0.20mm tp=0.24mm 0.3 0.4 0.5 0.6 0.7 0.8 200 250 300 350 400 450 500 Opening Force (N) Thickness ratio tp=0.16mm tp=0.20mm tp=0.24mmscore angle( 70°), score width(0.01mm).
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