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Online since: December 2014
Authors: Rui Wang, Kai Yuan Zhang, Le Zhang
A test of data collecting, handling and storing is carried out in the lab to verify the feasibility of the system.
Signal processed by conversion circuit and amplification circuit has realized the I - V conversion and noise reduction effect, and got weak fluorescent signal put into the PMT, and then steps into the data processing module controlled by FPGA[4].
The main function of data processing module is: (a)Control the wavelength scanning of grating monochromator (b)Achieve further processing and synchronous detection of the signal (c) Provide PMT with negative high voltage power suppl (d)Implement various interfaces (including buttons, LCD, etc.)
At the same time it can also drive the ADC,which provides drive pulse for stepper motor, and save the ADC data for storage and processing, finally it draws the spectral graph in LCD or PC.
Conclusion LIF quality detection system based on FPGA uses NIOS soft core carrying the SOPC, and run C code to control the ADC and all sorts of peripherals.At the same time,the system uses FPGA and related components to complete the water quality of fluorescence spectrum data collection and processing.
Online since: December 2014
Authors: Valentina Loganina, Ludmila V. Makarova, Roman V. Tarasov, Ksenia A. Sergeeva
Sergeeva4,d 1Department of Quality management and technology of building production, «Penza State University of Architecture and Construction», Penza, Russia 2 Department of Quality management and technology of building production, «Penza State University of Architecture and Construction», Penza, Russia 3 Department of Quality management and technology of building production, «Penza State University of Architecture and Construction», Penza, Russia 4 Department of Quality management and technology of building production, «Penza State University of Architecture and Construction», Penza, Russia aloganin@mail.ru, bMak.78_08@inbox.ru, crwtarasow@rambler.ru, d kleopatra0100@rambler.ru Keywords: limy compositions, filler, calcium silicates, structure, water resistance Abstract: Data about regularities of influence of filler, based on the calcium hydrosilicate, on properties of limy dry construction mixes and coverings in their basis are given.
Samples with Kratasol's PFM additive have higher value of coefficient of a softening (Ksoft=0,57) and S-3 (Ksoft=0,63) that, apparently, is explained by existence in composition of an additive Kratasol PFM the hydrophobic component, and also by creation of more dense structure owing to reduction of an amount of water of a mixing.
Introduction to a compounding an additive HSC leads to reduction of porosity.
Online since: October 2011
Authors: Peng Fei Tu, Hong Tao Li, Sheng Chao Wu
This paper attempted to give the answer on the basis of GPS data and the local water report. 1 Landslide Introduction Xiangxi River is a branch of north Yangtze River.
Geological survey data shows that the primary gully is located in the direction of the landslide main axis, and the counter-slope is in forepart of the primary gully.
Fig.2 Bazimen landslide deformation monitor data Fig.3 Relationship among GPSC3 monitor data, water level and rainfall As shown in Fig.3, the deformation of the landslide presents a saltatory development.
As the deformations of the monitoring points in early-warning region are in same pace, GPSC3 is selected as typical deformation data.
By using data fitting tools, the unknown numbers in the exponential term are fixed as a=-3.795,b=10.883,c=-3.901.
Online since: August 2024
Authors: Patrice Gergaud, Cédric Masante, Fabien Roze, Mathieu Opprecht, Jérôme Biscarrat, Sébastien Kerdilès, Philippe Godignon, Louis Thuries, Romain Laviéville, Nicolas Vaxelaire, Adeline Grenier, Carl Jung, Lu Lu, Zeinab Chehadi, Toshiyuki Tabata
An in-depth understanding of the impact of laser conditions on these stages is achieved, based on electrical data, Raman spectroscopy, optical microscopy, Scanning Electron Microscopy (SEM) and Scanning Transmission Electron Microscopy (STEM).
In this low ED regime, Raman spectra confirm the SiC decomposition onset, with the appearance of graphite related peaks (data not shown).
Thus, both the use of a heated chuck and several pulses at the same location enable a reduction of the required ED to get a specific microstructure.
In addition, Ni thickness reduction and/surface preparation could possibly open new options for contact formation.
Online since: January 2013
Authors: Mahesh Kumar Agrawal, Madan Mohan Mahato, Sharda Nand Sinha
b) Reduction processes based on non coking coals.
d) Smelting Reduction Process.
The reduction of iron oxide takes place in the following two reactions in stack region: · Indirect reduction at temperature below 1000 degree C
· Direct reduction at temperature above 1000 degree C.
Table – 1: Operational Data Sl.
Online since: April 2018
Authors: Bernd-Arno Behrens, Kai Brunotte, Dieter Bohr
Process specific approaches are aimed at the stress reduction during the process by means of optimised cooling and lubrication strategies [5, 6].
The samples were compressed to a strain of φ = 0.7, which is equivalent to a height reduction of approximately 15 mm or rather 50 %.
Comparing the maximum loads Fmax of the reference dry samples with the impregnated ones, maximum reductions of 33 % and 39 % for ρrel,target = 0.8 and ρrel,target = 0.9 are achieved.
In the compression tests load-displacement data was recorded and the maximum load was determined.
Reduction of wear at hot forging dies by using coating systems containing boron.
Online since: December 2015
Authors: Hai Tao Zhu, Mazhar Ul Haq, Shaban Usman
Additionally, ergonomic problems require experiential data on human capabilities and have to be studied and analyzed at the early design stages [3, 4].
Consequently, the total cycle time reduction is valuable.
The total cycle time reduction is 4.37 sec i.e. about 9.87 %.
The total energy expenditure reduction is about 26.27%.
The result of the research work is obtained in the form of various ergonomic improvements on last work station i.e. better RULA scores, a drastic reduction in cycle time and saving energy expenditure.
Online since: November 2005
Authors: Seon Jin Kim, Sang Woo Kwon, Yu Sik Kong, Yeong Sik Kim
To utilize the properties of friction welding effectively, and get safety and reliability of product or structure, it is required to get a full knowledge of friction welding strength properties based on a practical evaluation method and to build up reliable data.
Fig. 5 shows the relationship between frictional heating time and ductility (elongation and reduction of area).
The reduction of area is all alike (approximately 19%), but turns 33.4% at 4 (s) heating time.
(S45C) Optimum of t1 Strength, σt, σy, σb (MPa) Heating time, t1 (s) 0 1 2 3 4 5 6 7 8 9 10 0 5 10 15 20 25 30 35 40 Fracture strain Reduction of area Optimum of t1 Fracture strain, ε (%) Reduction of area, φ (%) Heating time, t1 (s) Fig. 4 Tensile strength vs. heating time Fig. 5 Ductility vs. heating time Hardness distribution and microstructure.
One special thing in the hardness test is that the hardness distribution width at HAZ of SCM440 maintains approximately 3mm max, and then it shows a rapid reduction toward the center, while the hardness distribution width at HAZ of S45C shows 2.3mm a great decrease in weld interface (WI).
Online since: March 2011
Authors: Alexander Brosius, Simon Opel, Lukas Kwiatkowski, Björn Plugge, Sebastian Schunk, A. Erman Tekkaya, Marion Merklein
The radial feed motion (x-axis) of both rolls in combination with a defined sheet reduction (z-axis) enables sheet thinning in the middle area and a circulating sheet thickened outer region.
The resulting mechanical properties mainly depend on the specific roll feed and the sheet reduction [9].
The investigations are carried out with a constant sheet reduction of Dt = 0.5 mm, which is assigned as the upper limit for prospective experiments, and the process parameters shown in Fig. 3.
b) a) Figure 5: Process force in a) z-direction Fz (table / roll 1) and b) x-direction FX (roll 1); sheet reduction Dt = 0.5 mm; specific roll feed x = 0.5 mm/rotation.
The flow-curve is approximated using Voce´s approach, which correlates best with experimental data.
Online since: September 2014
Authors: Stefano de Santis, Gianmarco de Felice
Test data were acquired at 10Hz frequency by means of a National Instruments system; the acquisition software was developed in LabView environment.
The resulting reduction of tensile strength is 30.7% after 1000 hours (Fig. 3a), and the Young’s modulus (after the same ageing period) is 12.3% lower than that of the reference specimens (Fig. 3b).
Diversely, the AR-glass-aramid mesh shows a slight deterioration, with a reduction of the maximum stress of 8.2% after 1000 hour ageing duration, while no significant variation is found for the Young’s modulus.
As soon as the stress exceeds the tensile strength of the matrix, cracks develop and a reduction of stiffness is recognizable.
· Cracking causes strong load reductions, especially when weak and deformable matrices are used, indicating that crack development (stage II) is the prevalent mechanism in the reinforcement systems tested in this study
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