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Online since: October 2006
Authors: Haruyuki Kawahara, Hirotada Koike, Dai Kawahara
Clinical Data Collection Twenty fixtures installed into 7 patients, 5 maxilla and 5 mandible were evaluated. 10 standard machine threaded Brånemark clone fixtures or 10 Tapered Screw Vent™ fixtures were installed into mandible or maxilla, using ATR5000 plus instrument to measure sequential torque value at every 100 microseconds during fixture install.
Conventional Brånemark clone, Lifecore Restore Implant (3.75mm diameter x 13 mm length) were installed using KaVo IntraSurg 905 system connected with KaVo 3636 gear reduction control and 67IRC contra angle head.
Fixture was performed using 50% troque reduction (less than 33Ncm).
Clinical Data Collection Typical fixture install torque profile is shown in figure 4.
All CTV data collected from mandible were greater than that of maxilla's that except one anterior case in maxilla without bone graft.
Online since: December 2014
Authors: Wei Bo Shi, Xiu Min Yu
Follow an overview of spark ignition engine using hydrogen and gasoline mixtures, general trade-off when operating engine on hydrogen and gasoline mixtures are analyzed and highlights regarding accomplishments in efficiency improvement and emissions reduction are presented.
For the richer mixture, 10% hydrogen blending leads to an substantial reduction of the total PM number concentration and a reduction of the total PM mass concentration [4].
Data analysis showed that lambda was an inadequate dilution parameter.
Online since: January 2005
Authors: Kazuhiko Ohmori, Tomonori Umeda, Takuya Sakaguchi, Masaaki Doi, Pan Huayong, Hidefumi Asano, Nobuo Tanaka, Masaaki Matsui
Fe-Pt nanoparticles were synthesized by the chemical reduction of H2PtCl6 and the decomposition of Fe(CO)5 in the presence of PVP polymers.
On the other hand, Zeng et al.[5] reported that the FePt nanoparticle assemblies indicated exchange coupling resultant from the reduction of interparticle distances at annealing temperatures more than 600℃ and there is no evidence of carbon residue presented at grain * Present address: Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan boundaries of the coalesced particles by annealing.
Experimental Method The synthesis of FePt nanoparticles is based on the reduction of H2PtCl6 (from Pt 4+ to Pt 0 by ethylene glycol(HOCH2CH2OH) and the decomposition of Fe(CO)5.
Assuming that all the nanopartcles are completely L10 ordered, this critical diameter is estimated to be 1.1nm from the above mentioned consideration using the data, K=5× 10 7erg/c.c. and TB=100K(Fig.6).
Online since: July 2011
Authors: Moon G. Lee, Dong Kwon Kim, Jin Woo Lee, Kuen Tae Park, Hyun Jung Kim
From the experimental data, the effects of the vibration amplitude and the frequency on the thermal performance are discussed.
An Agilent Technology 34972A DAQ is used to acquire the signal from the thermocouple and convert them into the temperature data.
(a)L=100 mm (b) L=75 mm Fig. 4 Thermal resistances In Fig. 5, the thermal resistance reduction caused by vibrating the fins with the resonance frequency is presented for the two fins.
As shown in Fig. 5, despite the fact that the longer fin have lower resonant frequency, the longer fin shows more dramatic reduction of the thermal resistance compared to the shorter fin.
Fig. 5 Thermal resistance reduction caused by the vibration Conclusions In the present study, it was investigated how the vibration influences the thermal performance of the single fins.
Online since: February 2014
Authors: Masashi Kato, Yuto Mori, Masaya Ichimura
The absolute signal depends on the sample thickness, the distance between the waveguide and the sample and so on, and thus we focus on the slope of each data in the figure.
As shown in this figure, below photon density of 5´1013 cm-2, the m-PCD peak is proportional to the photon density for all the measurement conditions and also for data reported in ref. 5.
If origin (i) is dominant, the reduction of the total conductivity change will keep the proportionality up to a larger injected photon density.
By reduction of the total conductivity change, we can obtain the m-PCD peaks proportional to the injected photon densities even in the high injection condition.
Of course, the reduction of the total conductivity change decreases m-PCD signal intensities, and thus a lower limit of the measurable range in the injection photon density increases.
Online since: February 2014
Authors: Si Qin Chang, Liang Liu, Ming Hai Xu
With the benefits of Camless valvetrain, the low-end torque will be improved from 10% to 20% and the fuel economy will be increased by 16%-19%, as well as a substantially reduction of emission [6].
Engine modeling step: (1) study the main parameters of the engine to measure, collect the data and information.
The main parameters of the gasoline engine are shown in table 1. (2) Make the complexity of the actual engine broken into several easy to deal with the subsystem, and use of AVL Boost module to provide needs and establish the physical model. (3) According to thermodynamics, heat transfer, mass transfer of knowledge, the simple physical model of a quantitative mathematical description of the collected data and information input the engine module corresponding to them, which it is a mathematical model. (4) Use their model to establish the preliminary simulation.
They illustrate the comparison of camless engine equipped with EMVA and conventional engine, and highlights the reduction in pumping loss during part load that can be achieved ,theoretically.
Electromagnetic valve actuation system e-valve: convergence point between requirements of fuel economy and cost reduction.
Online since: August 2013
Authors: Ling Xu, Ling Lin, Jin Huang, Chen Yi Li, Bin Lu, Xiu Teng Wang
Lower Heating Value Estimation of Coal Gangue through Proximate Analysis Data Based on GB/T 212-2008 Xiu-Teng WANG1, a, Bin LU2, Ling XU3, Chenyi LI3, Ling LIN1 and Jin HUANG1 1Subinstiture of Resource and Environment, China National Institute of Standardization, Beijing, 100191, P.
Herein, we use an alternative approach to estimate the heating value based on proximate analysis data, which are measured under the instruction of GB/T 212-2008.
One of the alternative approaches is estimating heating value based on proximate analysis data as the calorific property of fuel is determined by the chemical composition.
Namely, according to the physical and chemical properties of different components in the coal gangue sample, they are decomposed or combusted under different temperatures and the mass fractions of the components can be worked out as the percentage of weight reduction.
From the calculation data of our work, we can see that the LHV of these six samples range from 2307 to 8309 kJ/kg.
Online since: October 2010
Authors: Min Quan Kuang, Shan Xiang Zhang, Pei Xu
Substituting the above values into Eq. (1) and fitting the calculated results to the experimental data, we have ρ » 4 %
For comparisons, the observed EPR data for the similar tetragonal Cu2+ centers on the original trigonally distorted octahedral Cd2+ site [7] in CsCdCl3 and the octahedral interstitial site in the CdSe nanocrystals [18] are supplied in Table 1.
b The experimental data for the Cu2+ center on the Cd2+ site in CsCdCl3 [7].
c The experimental data for the Cu2+ center on the octahedral interstitial site in the CdSe nanocrystals [18].
Discussion One can find from Table 1 that the theoretical EPR parameters based on the relative elongation ratio ρ in Eq. (4) are in good agreement with the experimental data.
Online since: October 2014
Authors: Septimiu Albetel, Vlad Martian, Mihai Nagi
Data reduction.
Data obtained from the test was reduced using the technique described by Wang et. al. in [11] with the help of the ϵ-NTU method.
Chi, Heat transfer and friction characteristics of plain fin-and-tube heat exchangers part I: new experimental data, Int.
[10] ASHARE Guideline 2, Engineering Analysis of Experimental Data, Atlanta, ASHARE (1986) [11] C.
Chi, Data reduction for air-side performance of fin-and-tube heat exchangers, Exp.
Online since: May 2005
Authors: Andrea Parisini, Sandro Solmi, Antonella Poggi, Roberta Nipoti
At higher temperature, our oxidation data support the existence of a sudden variation of the recrystallization process that rapidly reduces the residual amorphous region and, consequently, the oxide thickness.
Filled circles and triangles represent data obtained through Rutherford backscattering spectrometry in a channelling geometry (RBS-C) and TEM, respectively.
The large difference between the activation energies of the oxidation and recrystallization rates, 1.6 and 3.4 eV, respectively, explains our experimental data.
The curve shows a maximum at 910 °C, in excellent agreement with the experimental data.
A sudden variation of the recrystallization rate is necessary to explain our data.
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