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Online since: December 2013
Authors: Krishnan Jayaraman, Nawawi Chouw, Li Bo Yan
Readings of the strain gauges and LVDTs were taken using a data logging system.
Readings of the load, strain gauges and LVDT were taken using a data logging system.
This data indicates that the two different types of FFRP confinements increase the ductility of the concrete cylinder remarkably.
The reduction in ultimate strength of FFRP-wrapped PC and CFRC are 15.0% (from 62.2 MPa to 52.9 MPa) and 16.3% (from 58.2 MPa to 48.7 MPa), respectively.
Online since: March 2013
Authors: Robert Starosta
By computer program ‘Elfit - corrosion polarization data fitting program’ the value of corrosion current density was made calculation [5-6].
In an environment of sulfuric acid solution, it was found that 45% of alumina caused a reduction in the average value of the potential corrosion (Ecorr) coatings to from about -103 mV to -192 mV for the alloy coating (Fig. 3).
The equivalent circuit used for modelling the recorded data Table 1.
Resistances of plasma sprayed coatings(values) Coating Rs [Wcm2] Rct [Wcm2] Average Average Standard deviation Environment: 0.01 M H2SO4 Ni-Al 7 1500 157 Ni-Al-15%Al2O3 8 1321 98 Ni-Al-30%Al2O3 7 1254 121 Ni-Al-45%Al2O3 6 1105 138 Environment: 3.5% NaCl Ni-Al 1 1954 380 Ni-Al-15%Al2O3 0,42 2058 177 Ni-Al-30%Al2O3 28 4242 575 Ni-Al-45%Al2O3 5 4280 457 Data were analysed using the equivalent circuit shown in Fig. 2.
Online since: June 2013
Authors: Jie Liu, Chang Yi Jin
., etc. 2) Controlling Function of DEH DEH System could help realize various controlling functions, like speed ascending control, over-speed experiment, corresponding control, load control, air exhaust pressure control, primary frequency regulation, electric control, fast reduction of load, etc.
It is also added with protection functions, like low-air pressure protection, OPC protection, etc. 3) Systemic Function of DAS DEH System could help realize basic DAS functions, like data browse display, system diagram browse, data trend chart realization, historical data storage, accidental retrospection, report printing, etc. 4) Technological Index of DEH Speed-control precision ±0.1%, load-control precision ±1%, air exhaust pressure-control precision ±0.01MPa. 2.2.4 FSSS Supervision System on Safety of Boiler Furnace Furnace detonation once occurred to boiler No.9 which was a 220t/h coal - pulverized boiler of no safety supervision system, leading to severe damage to the whole equipment.
Online since: April 2013
Authors: Li Juan Mu, Zhong Yi Zhang, Li Ye Zhang, Chuan Dong Chen, Zeng Qi Zhao
There have some oxidation-reduction reactions between the chemical constituents of polishing slurry and atoms of component surface during CMP process.
Fig. 2 shows statistical data of publications in this field per year during the period 1993 to August 2012, the data was collected from “Web of Knowledge” using the keyword of “core/shell nanoparticles”.
Statistical data shows there have a trend increasing sharply of research and discussion in this field after 2004.
Online since: February 2012
Authors: Cătălin Alexandru
Introduction Important publications reveal a growing interest in analysis methods for multi-body systems (MBS) that may facilitate the self-formulating algorithms, having as a main goal the reduction of the processing time in order to make possible real time simulation [1,2].
Optimization Algorithm In the virtual prototyping concept, the steps to create the digital model of a mechanical system mirror the same steps to create the physical model, as follows: build (modeling parts, constrain the parts, create forces), test (measure characteristics, perform simulation, review animation), validate (import test data, superimpose test data), refine (add friction, add flexible components - compliant parts and joints, add automatic systems that control the operating performance), and optimize.
Constraints can involve the simulation results, or they can constrain overall size, weight, and other factors that depend only on model data.
Online since: February 2012
Authors: Fei Yan, Ming Jian Li
Hardware control nodes select the development mode with control module at the core to extend their I/O pins, in which IO_0-IO_7 is taken as data input and output, while IO_8 and IO_9 are taken as control signals of data input/output.
Among them, M7812 and LM7805 isolate the two signal ends, so as to provide mutually isolated signal grounds for photocouplers in data input/output circuits.
Fig.4 Separate window control interface Summary Confronted with the current growing energy scarcity, making full use of natural light in buildings to achieve lighting function can not only achieve the purpose of energy conservation and emission reduction, but also help improve work efficiency.
Online since: March 2012
Authors: Xin Chen, Jun Long Zhou
After solving, time-domain of 9 monitoring points pressure were got and then through FFT transformation, spectral data of each monitoring point can be obtained.
In the data of monitoring points 1/2/3(Fig. 5/6/7), we can find that whether in low-frequency or in high-frequency, sound pressure level of up-raised rearview are higher than the down- raised type both in point 1 and point 2.
Data shows that up-raised rearview cover is more conducive to reduce interior noise.
The noise reduction effect is very obvious.
Online since: October 2006
Authors: Karin Popa, Rudy J.M. Konings, Daniel Bouëxière, A. Florin Popa, T. Geisler
Crystal data of the room temperature phase of some BaM IV(PO4)2 compounds.
The most likely space groups can be determined based on Raman data: the number of Raman active internal PO4 vibration modes decrease from nine to six at the phase transition, which was observed around 730 K (Fig. 3a).
Group theoretical considerations for the high-temperature polymorph of BaZr(PO4)2 have shown that the reduction of the number of Raman bands is only be consistent with a trigonal structure, where the Ba and Zr atoms are located at a D3d site, the P and two O at a C3v, and six O atoms at a Cs site in the D3d factor group [8].
Analogous to BaZr(PO4)2 , we determined the crystal class and thus the most likely space groups of this polymorph based on Raman data.
Online since: October 2010
Authors: Guo Jun Liu, Yong Qing Yang, Fan Guo
Introduction In decades or even hundreds of years' service, due to loading, fatigue effect, corrosion effect, material aging and other various unfavorable factors, the bridge will inevitably has the cumulative damages, resistance attenuation, function reduction, even leading to unexpected incidents.
Common classifications of overall damage identification techniques are as follow: identification based on dynamic testing and damage identification based on static test methods according to the source of the data; dynamic fingerprints and model updating method according to whether the inversion occurs.
Such fingerprints are obtained through linear and nonlinear dynamic processing of time-displacement data.
References [1] Huang Shengnan, Studies on the Damage Identification of Reinforced Concrete Girder Bridges [D], Tsinghua University. (2008) [2] Jiang Hua, Research on Bridge's Damage Detection and Evaluation Based on Static Test Data [D], Southwest Jiaotong University. (2005) [3] Shan Deshan, Smart Bridge Health Monitoring and Damage Diagnosis [M], China Communications Press. (2010) [4] Ran Zhihong, Study of Dynamic Fingerprint Methodology in Damage Identification of Bridge Structures [D], Southwest Jiaotong University. (2005) [5] Wang Zhongdong, Structural Damage Detection Based on The Method of the Residual Modal Forces Analysis, Journal of Jilin University of Technology (Natural Sciences), Vol. 29, 1999, pp.61-66
Online since: July 2013
Authors: Jin Jiang Li, Fan Hui, Ren Lu
This paper is to study before researchers for and significant visual saliency and attention, and review the related data for the application of this aspect.
This paper is to study before researchers for and significant visual attention, and review the related data for the application of this aspect.
Based on visual attention model,Zhang Libao used high resolution remote sensing image spatial dimension reduction to determine the visual focus,and then according to the location of the focus, in the original remote sensing image to calculate the corresponding interest area.
Study of visual attention model, not only helps to understand the working principle of the human visual information processing, but also help solve the problem of data filtering and improve the efficiency of computer information processing.
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