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Online since: October 2013
Authors: Zhi Gang Ling, Zi Qiang Ma, Zheng Gui Gou, Xiang Liu, Yan Lin Tang, Yu Peng Li
The use of remote sensing data is given priority to with TM and NOAA/AHRR combination.
With MODIS data issuing, gradually carried out some study on crop monitoring using the MODIS data [4].
(4)Haze Reduction.
In Bottom Left, there is data statistics table.
The first is Y=a*NDVI+b by selecting the parameters a and b you can calculate the production, and the second is Yt=Yy*NDVI/NDVIy the NDVI data is this year’s, the NDVIy data is last year’s.
Online since: May 2012
Authors: Ling Yun Meng
The measurement of the drying shrinkage stress and depth of cracks caused by the drying shrinkage stress is made by using translation symmetric theorem and adopting dog-shaped specimens, and the analysis of changes in depth of cracks over time for two kinds of specimens is made. using the method of comparison ,the comparison of the gradient of the drying shrinkage stress for two kinds of specimens is made ,and it comes to the conclusion that the median drying shrinkage stress in the concrete fully restrained is higher in value by 1MPa compared to the drying shrinkage stress in non-restrained concrete Introduction Before concrete hardens, capillary water in the concrete spreads towards the air and concrete suffers reduction in volume so as to result in drying shrinkage stresses.
Table 1 Composition of the mix Stone Water-cement ratio Cement Water Sand Water-reduction agent 1075 0.35 480[kg/m3] 170[kg/m3] 631[kg/m3] 3.36[kg/m3] Design of Specimens.
Experimental Results and Data Analysis Figure1, Drying shrinkage stresses against depths Changes in Drying Shrinkage Stress and Cracks for Non-restrained Specimen.
As the concrete dries ,the curvature of capillary surface gradually increases and the capillary water pressure decreases so as to accelerate the spread of moisture, thus resulting in reductions in relative humidity in concrete.
Online since: December 2011
Authors: Raul Turmanidze, Teimuraz Mosashvili
Reduction of the harmful influences of these forces became rather actual problem.
For reduction of diameter the piston and rod of the hydro-cylinder travel in the necessary direction and by means of the ropes the rotor diameter decreases.
Fig. 2 Blade with flexible elements and rib During the first year according to the Work Plan was conducted a detailed analysis of the existing literary data, were implemented the necessary aerodynamic and strength calculations, were compiled technological maps of manufacturing all the significant parts, simultaneously were manufactured parts and units, was implemented updating of stands for static and dynamic investigations in accordance with the new rotor design, were conducted preliminary tests of blades on the stand for static tests and prepared the stand for dynamic tests for conduct of detailed experiments (Fig. 2).
The use of rotors of a new design on airplanes of VTOL can increase the payload approximately 1.6 times or distinctly increase the flight distance at the expense of reduction of the fuel consumption.
Online since: December 2014
Authors: Yu Lin Wang, Qian Qian Wang, Yi Hui Feng
There are two methods to solve the above problems, one is choosing suitable controllers and controller parameters, the other is taking appropriate reduction of frequency for stepping motor to avoid exceeding when the feed movement is close to the end.
On one hand, the NC software prevents system from exceeding by proper reduction of frequency; on the other hand, once exceeding error occurs, it will be eliminated in next command to avoid error accumulating.
Experimental data and analysis A quasi-close loop control system for lathe is formed by taking Model CK-I NC system and installing grating scales on a lathe as displacement measuring equipment.
This is guaranteed by proper reduction of frequency in software.
Online since: October 2013
Authors: Jasmin E. Hurtado, Juliet Mormontoy
Statistical analysis All data was analyzed using the statistical program SPSS version 18 (IBM Corporation, United States).
Also, sulphide toxicity varies according to the group: Desulfobacter tolerates better this inhibition [14], and finally, SRB are capable of maintaining a neutral microniche under acidic conditions, since the reduction of sulfate may consume protons from the medium [13].
Microbial sulphate reduction at low pH.
Microbial sulfate reduction under sequentially acidic conditions in an upflow anaerobic packed bed bioreactor.
Online since: August 2016
Authors: Marius Ardelean, Erika Popa, Liviu Pascu, Ana Virginia Socalici
They allow a noise reduction by cu 10dB, which represents 50% of the noise made by the cast iron.
The target of the community action is to cut down the citizens’ exposure to railway noise by promoting programs of railway noise reduction, particularly for freight trains, without impairing their competitiveness; this can be done by endowing freight carriages with silent brakes [6].
Fig. 3 The temperature distribution for Fig. 4 The temperature distribution for length L = 500m length L = 1000m Fig. 5 The temperature distribution for Fig. 6 The temperature distribution for length L = 1500m length L = 2000m Fig. 7 The temperature distribution for Fig. 8 The temperature distribution for length L = 2500m length L = 3000m Fig. 9 The temperature at the end of Fig. 10 The temperature at the end the test composite of the test pin The analysis of the data and diagrams leads to the following: - the temperature in the contact zone grows rapidly in the first part of the test, so that after the distance of 500m has been covered, it reaches 1160C
Sonawane, Study of friction and wear for optimization of disc break material for reduction of brake sound, International Journal of Research in Aeronautical and Mechanical Engineering, 2/6 (2014)137-144
Online since: November 2007
Authors: Lydia Heimann, Stefan Deußer, Elvira Dingeldein
Milling with 1cm and 3 cm balls resulted in slowly and in some cases non setting cements, therefore the data for 1 cm are not shown.
We suggest the significant reduction of the FST in twice milled powders depends on the reduction of nano particles due to agglomeration.
Reduction of particle size results in a decrease of setting times.
Online since: May 2014
Authors: Steffen Schmid, Manfred Bacher-Hoechst, Stephan Issler
Open marks are used when the fatigue crack is initiated at carbides at the surface of the specimen and closed marks indicate data of specimens where the crack is initiated at carbides in the interior.
Or with other words, considering a fracture mechanics model, this effect is equivalent to a reduction of fatigue threshold due to the aggressive environment.
Figure 11: Construction of component fatigue curve (schematic) [4] Extended measures to increase the VHCF-lifetime of components - for example by reduction of internal inclusions or material defects - may not have the expected effect, if possible surface failures – for example due to surface machining effects – are not improved in parallel.
In these cases, for example at internal pressure loaded components, the specimen testing fill up the missing information in the VHCF-area concerning failure modes and reduction of lifetime at components.
Online since: December 2014
Authors: Sergey Udalov, Andrey Achitaev, Natalya Zubova
The ensuing effects include drag reduction, lift enhancement, mixing augmentation and flow-induced noise reduction.
Comparison of the power curves of turbines with variable length blades and blades fixed length Experimentally obtained data proved the theoretical assumptions and calculations.
Also, the operation of AFC devices has some potential secondary benefits: devices may be deployed to increase lift of the blade at low wind speeds, allowing the turbine to cut-in earlier and capture additional energy; active devices could aid in energy capture and load mitigation on turbines that experience high array effects; devices could be used to prevent tower strikes, allowing for larger diameter rotors to be used and thereby increasing energy capture; aerodynamic performance enhancement and noise reduction could be realized by maintaining laminar flow over the blade.
Online since: November 2010
Authors: Li Li Liu, Guo Zhi Zhang, Zhong Wu, Jun Jie Xi
Assuming that all the plastic work in rolling is transformed into heat, the generated heat energy of the ARB specimen can be expressed as[10] (1) Where, is the reduction in area the ARB specimen; is the mean flow stress; v is the rolling speed; is the rolling time; is the constant, it is (2) Where, is the reduction of the thickness of the ARB specimen.
In Fig.1, the experiment values are the experiment data of the reference[12].
The reduction was 50% every cycle.
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