Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: February 2012
Authors: Tuo Li, Xiao Wei Liu, Zhen Gang Zhao
But when MWNT content is excessive, the reduction of SiO2 will decrease the amount of adsorbed vapor on the film surface to a certain extent, which will on the contrary restrict the sensor’s humidity sensing ability. 3.2 Sensors’ sensitivity and testing frequency relation for sensors of high MWNTs proportion.
According to data from figure 3 and equation 1, each sensor’s humidity sensitivity at different frequencies is calculated and the results are shown in figure 4.
Online since: January 2007
Authors: C. Lucien Falticeanu, I.T.H. Chang, J.S. Kim, R. Cook
However, the disadvantage of liquid phase sintering of Al alloy is that distortion within the P/M part and a reduction in mechanical properties due to the formation of a brittle intergranular phase can occur.
However, there is a limited amount of data available in the literature about microstructural developments undergone by different aluminium blends during sintering.
Online since: July 2007
Authors: Suk Young Kim, Sung Su Chun, Inn Kyu Kang, Timur R. Tadjiev, Hong Mi Kim
The large diameter reduction from a millimeter-scale fluid jet to a nanoscale solid fiber is due to instability, where the jet is stretched by whipping and bending. β-tricalcium phosphate (β-TCP), Ca3(PO4)2 ceramic, characterized by a Ca/P ratio of 1.50, was chosen as a candidate for electrospinning because β-TCP is one of the most interest bioceramics due to the excellent biocompatibility and biodegradability.
As the increase of feed rate up to 1 mL/h, the fiber diameters increased for both aselectrospun and heat-treated fibers and also the bead formation observed instead of well-defined fibrous network (data not shown).
Online since: May 2012
Authors: Yang Liu, Xiao Zhu Li
Large field test can provides the basis for selecting the parameter of rockfill dam filling construction, however, it is a costly, long term process, which data is often discrete and does impact on the research work.
The reduction of the fine particles content is not enough to fill the gap between the coarse particles, leading directly to the decreasing of the dry density.
Online since: May 2012
Authors: Ke Feng Zhang, Zhi Xiang Cao, Zheng Bing Xia
The statistics data solution of Structure vibration frequency The key solution of high arch dam structure vibration frequency is solving process of random variables in the average point spread for Taylor series and unfolding the second item.
And by using vibration model for processing the orthogonality of the final on the high arch dam structure calculate vibration frequency of standard deviation and variance of the two indexes, the solution is unfolded, analyzing type(2)and suppose, simply compute is as follow: (13) For the random variable ,at the average point, and is unfold for Taylor series and arrived second item: (14) (15) (16) Make type(14)、(15)and(16)is respectively substitute type(13), and by using vibration model of orthogonality and settled as follow: (17) According to the definition of the mean and the covariance, the statistical index of the high arch dam structure vibration frequency is obtained as follow (18) Type(18)includes the following type: (19) (20) Lay down a second reduction and get the following type:
Online since: May 2012
Authors: Ji Qi, Zhong Yi Zheng, Jian Min Li, Min Sun
If the emission rate of pollutants is “Q”, reduction rate is 0, the density of pollutants flowing into the box from the windward is constantly “b”, the generating rate of pollutants in the box is “q”, and the final density of pollutants is “c”, then, l The pollutant-quantity per unit time flowing from windward is “uWHb”; l The pollutant-quantity per unit time generated in the dedicated box is “Q=qA=qWL”; l Due to the theory of material balance, the result is “uWHb+qWL=uWHc”; l The final result is “uHb+qL=uHc”; l To go a step further, we can get it easily that, “c=b+qL/uH”, “q=(c-b)uH/L”.
By using the final Eq.12 computerly, tankers are able to sail safelier and more economically: l Design and establish software as per Eq.12; l Observe necessary values onboard ship, including the ship’s course and speed (to get the vector velocity ), and direction force of the wind (the vector velocity ); l Refer to the related materials, such as MSDSs (Material Safety Data Sheets) for the maximum toxicity density permitted of the cargo vapor (LD50, the value “c” in this paper); l Refer to ship’s Procedures and Arrangements manual (P & A) to get the height and the throat diameter of the pressure reducing valve (to get the value “H”, and calculate “Q”), the horizontal distance between the pressure reducing valve and edge of her superstructure (the value “x”) ; l Adopt empirical values from experts asand; l Input the values above into dedicated computer.
Online since: July 2011
Authors: Mohd Sobri Takriff, Ahmed Y. Musa, Abu Bakar Mohamad, Abdul Amir H. Kadhum, Long Lynnyen
All the impedance data are fitted with appropriate equivalent circuit using the Gamry Instrument Echem Analyst.
The electrode with PANI coating does not shows any oxidation and reduction peak.
Online since: October 2004
Authors: Hasso Weiland, Anthony D. Rollett, Mitra L. Taheri
Unfortunately, very little experimental data has been collected for either low or high angle boundary mobility in alloys although some studies have been performed in nominally 'pure' materials [6].
(a) (b) Figure 4: (a) Diameter versus Misorientation Angle for HPAl+Zr annealed at 485°C for 20 minutes, indicating shift of maximum from approximately 38° to a minimum yielding new maxima at 35°and 48°; (b) Reduction in amount and severity of faceting in highly mobile grains in HPAl+Zr annealed at 485°C.
Online since: December 2011
Authors: Ge Liu, Bin Chen, Xian Ming Zhang
Based on the above experimental methods, high-speed arc spraying system for MIMO systems, input and output data collected 135 groups of which: the input variable x (k) set of parameters for the spraying process, the output variable y (i) and porosity for the coating wear resistance index, k for different spray parameters, i for the number of different coatings.Parameter identification based on T_S model consequent parameters is: 2 Results of identification Based on using the above fuzzy identification model, the various parameters on the coating properties as follows: (1)Arc spraying heat source parameters on the coating wear resistance.
(2) Analysis of spray parameters on coating wear resistance, The basic rules are: spray voltage increases, the coating deformation larger particle size, However, the porosity is lower with oxide reduction, coating hardness will increase; (3) The coating hardness is inversely proportional to the spray distance, and changes linear fundamental. in short, the overall trend of affect is an inverse relationship about spray distance on coating porosity; Air pressure is inversely related to porosity at air pressure 0.4-0.7Mpa, the coating hardness increased with the air pressure rise.
Online since: December 2011
Authors: Zhou Chen, Jin Lian Qiu, Teng Zhou Xu, Jie Ming Zhou, Wang Ping Wu, Cheng Dong Li, Bin Bin Li, Zhao Feng Chen
At higher values, there is some improvement in low-frequency performance but at the expense of a reduction in high-frequency absorption.
It is shown that the new form of the Johnson–Allard model gives significant improvements in the agreement between predictions and data.
Showing 27141 to 27150 of 40461 items