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Therefore, the precise classification of fine powder, which meets the requirement of the following process, becomes one of the vital technics in powder technology. [2] Several problems exit in the mechanical sieving classification of metal-powder as follows: (1) the screen blinding is serious when fine powder is processed which caused reduction of the throughput and sieving efficiency and a great loss of fine powder, (2) the screen is easily distorted and damaged when it is cleaned by means of high-frequency electromagnetic or ultrasonic vibration, (3) frequently replacement of the screen causing high labor intensity and low working efficiency and hetero-metal and non-metal materials could pollute the powder during the process of fixation and hermetization of screen , and (4) discretionarily adjustable separation size is unavailable because of the limitation of the sequence of mesh. [3] The problems mentioned above can be avoided by using other classification techniques without screen
In order to ensure the classification precision in practical processing, some methods can be used: 1) we could built up a system: the air flow velocity could be detected by a sensitive sensor, collection and transformation of the data are conducted by corresponding system, then the date will be putted into the computer, finally the computer send the commands to regulating system to precisely control the air flow velocity. 2) Appropriately broaden the separating room to reduce the fringe effect, and 3) choose the appropriate material for separating room in order to avoid the electrostatic effect between particles and material.

According to the related data of the metallurgical machinery, the density of molten iron is 6.5g/cm3.
Solid186 unit use the consistent reduction integral method and the complete integral method.

We substitute expression (14) in (12) and obtain After a reduction to eiωt , we write
The graphs obtained in the Matlab environment for the rod, the data of which were written at the beginning of the example, are presented.

Simply analyze humidity mechanism of the two composite material systems to provide some data for developing and designing structure composite material.
And the mechanism of the influence of tensile strength on the reduction rate speed requires further investigation.

Chang(2004) finished the numerical and experimental investigation on residual stress and compared the numerical solutions with experimental residual stress data [3].
Instead, the method deactivates them by multiplying their stiffness by a severe reduction factor.

- Geometry of specimen: gage diameter: 4φ, gage length:16mm - Strain gage: 12.5mm - Strain amplitude: ±0.4% - Waveform: triangular - Frequency: 1Hz - Fatigue life: 20% load reduction X-ray diffraction Test.
The AE properties measuring system used in this study consists of a 1 MHz acoustic emission test system, a 100 MHz spectrum analyzer, a digital oscilloscope and a personal computer for data processing.

In engineering practice, the tubing wall thickness reduction due to the erosion and corrosion of tubing wall can be controlled by controlling flow velocity.
According to API RP 14E standard, the use of basic data to calculate the limiting anti-erosion production rate for different tubing sizes is in Table 2.

It is well known that there are several kinetic models for the ODH of alkanes, such as power law (PL), Langmuir-Hinshelwood (LH), Eley-Rideal (ER), surface oxido-reduction (SOR) and Mars-van Krevelen [10-13].
In addition, the values of the determined parameters implied that the oxygen species particated in cyclohexane ODH should be the lattice oxygen species, not the gas oxygen, which was in accordance with the reaction mechanism proposed by Kung et al. [9].The comparison between experimental and calculated values of cyclohexane conversion was presented in Fig. 2, which suggested that the calculated values reproduce the experimental data with a small fitting error (matching mean error 8.7%).

The application fields of these textiles are broad, including health monitoring through sensor-embedded garments that track and record biometric data [1,2,3,4], heatable textiles for garments, interior and technical textiles [5,6] and environmental sensing and communication technologies for security personnel and workers at risk [7,8].
The reactions taking place in the solution can be described as follows: Upon the addition of sulfite, the trivalent gold Au(III) undergoes a reduction to Au(I) forming an Au(I)-sulfite complex: Au+ + 2SO32 → [Au(SO3)2] 3 The complex is converted to a Au(I)-thiosulfate complex and/or Au(I)-thiosulfate-sulfite mixed ligand complex when adding Na2S2O3: Au+ + 2S2O3 2 → [Au(S2O3)2] 3 Au+ + SO32 S2O32 → [Au(SO3)(S2O32)]3 There are still doubts on which complex-formation is preferred in the solution.

Improvements of currently used commercial dental restorative composite resins are focused on the reduction of the polymerization shrinkage [1], as well as the improvement of mechanical properties, wear resistance, biocompatibility, and processing properties.
Wide angle X-ray diffraction (WAXD) data (Fig. 2) indicated that all nanocomposites were amorphous.