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Experimental data show that the magnetic powder in fly ash and other magnetic minerals possesses greater coercive force and remanence, the necessary conditions for the magnetic powder seal in the ash-unloader.
However, the rotation of the magnetic domain improves with the size reduction.
As such, the data on the manometer will increase when the thickness of the seal layer increases.
The experimental data is shown in Table2.
According to the experimental data and the seal pressure tendency, the seal pressure increased with the increase in the mass fraction of the magnetic material found in the powder.

A shortening of the process chain allows a significant reduction of the manufacturing costs.
This task can be easily performed if a CAD-data of the tool geometry is available.
For the relation between deflection and transverse force following linear approximation was calculated from the experimental data: f(F) = 0.05F - 0.24. (1) Using the results of the elementary Theory of Elasticity it is possible to calculate the deflection of the cantilever under a bending moment M resulting from a given transverse force F applied at its free end.
Along with the classical elastic material parameters, described by Young's Modulus and Poisson's number, further input data for the description of the plastic behavior of the material, like hardening curve and normal anisotropy, must be determined by means of appropriate testing methods.
Main advantage of optical systems for the strain measurement over tactile ones is the possibility to extract usable data up to very high strain values [4].

Based on plastic strain catastrophe theory, and combining numerical results and in-situ data, the limit displacements for stability of surrounding rock were analyzed and obtained corresponding to the in-situ monitoring technology.
Some results have been obtained, but certain gap still exists compared with practical demand, showing as:(1) initial calculation does not converge for soft rock tunnel in high geostress ground;(2) the analysis result can only gives the ground stability factor, but feedback of ground stability condition can not be got by monitor data directly in construction;(3)the reduction scope is affected by subjective factors to great extent because the underground water errosion scope and excavation disturbing scope are affected by many factors.
Practical monitor data can not include the prior displacement before beginning of monitoring due to limitation of monitor means.
In order to facilitate field construction management, the deformation management datum is to correspond to the monitor data.
It is easy and practical to establish deformation management datum combining the in situ monitor results to implement construction decision.

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.

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.

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.

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.

Examples of such studies include improvement of the soundproof performance of windows, doors, and other openings in order to reduce the noise produced from external road traffic [1] and reduction of noise among the units between the upper floors and the lower floors [2].
The objective of this research is to evaluate the sound performance of the drainage system developed to reduce the drain noise, as well as that of the existing supply/drainage system currently installed in apartment complexes, and provide preliminary data for the development of bathroom noise reduction technology.
Acknowledgements This research was supported by a grant from the Korea Institute of Construction Technology for the “ A study on noise reduction solution for adjacency household in apartment house” project.

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

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.