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At present, the domestic this kind of equipment available, so for a certain type of helmet mounted sight detection work is difficult, especially for the helmet mounted sight tactical index: error azimuth, pitch angle, target indication cannot be detected, no detection means have not been able to detect the actual parameters of it, the study to detect a helmet simple and convenient for lab sighting equipment. 2 The mechanical design of the two degree of freedom test platform HMS test system is composed of mechanical testing platform, stepping motor control system and aircraft serial data receiving card, etc..
In order to improve the detection equipment resolution and reduce the machining expenditure, so in two channels, their reduction ratio are used 90:1, so that their resolution in theory should be 1′. 3 Working principle of two degree of freedom test platform As shown in Figure 1, the HMS principle test system are as follows: the helmet mounted sight observation components with fixed on the helmet mounted sight test system of rotating frame 15, the zero position through the computer / microcontroller output control instruction, so that the range of stepper motor, stepper motor 4 pitch 9, rotate a certain from the angle of a certain angular velocity in the specified direction.

The classification speed based on support vector regression machine is depended on support vector number, rather than the sample data number.
[2] J.Beerten, J.Verveckken,J.Driesen.Predictive Direct Torque Control for Flux and Torque Ripple Reduction [J].

With the reduction of the initial content of coarse particles, the influence of compaction on the particle size distribution was more and more low. when the initial content of coarse particles was reduced to 30%, the grain cumulative grading curves before and after compaction changed indistinctively, if continued to decline to 10 percent, the curves under the same grading were almost coincide, which indicating that at this situation the grain breakage ratio was already very low and the grain grading has reached steady state.
Through a series of transformation, formula (2) can be obtained: 　　　　　　　　　　　　 (2) Using the logarithmic of and to plot, the fractal curve can be constructed, if the curve has a relationship of straight line and its slope is k, then formula (3) can be get: 　　　　　　　　　　　　　 (3) Limited to the space, part of the fractal curves of granular micaschist before and after compaction are showed in Fig.2, and the specific fractal data of all gradings are also listed in table 1.

Such defects become apparent in use and contribute to a significant reduction in the units’ life.
According to the tests, the element thickness amounted to about 1690 mm (which was confirmed by the technical documentation data): ` (1) According to figure 1a, the design element thickness is 1700 mm.

Physical characteristics of the subjects Classification Data Age(yr) 23.6±0.84 Height(m) 1.64±0.07 Weight(Kg) 54.39±8.11 Body surface area(m2) 1.58±0.14 Heart rate（bpm） 64±2 Body temperature(°C) 36.20±0.28 Protocol.
Heat and moisture lead to significantly reduction of the human thermal comfort.

[4] Späth H. cluster analysis algorithms for data reduction and classification of objects.

The reduction of foam expansion when adding high amount of particles is due to increasing of viscosity in the molten Al [7].
Quantitative data of Al foams added with precipitator and cenosphere fly ashes Fig. 4 presents the microstructures of Al foams added with precipitator and cenosphere fly ashes.

Wagner, “Yttrium Oxide Nanoparticles Prepared by Alkalide Reduction,” Chem.
[9] B K Tanner and H Z Wu, S G Roberts, JCPDS-International Centre for Diffraction Data 2006 ISSN 1097-0002.

Data of experimental study was extracted from graph in journal with the help of software, Enguage.
Nonetheless, the increase in heat transfer coefficient is insufficient to compensate the reduction of surface area.

The suitable porosity for anodes in SOFCs is approximately 40% [10], usually obtained with graphite as sacrificial additive and with the reduction of nickel oxide used to obtain the cermet YSZ-Ni.
A special software was used for collecting and analyzing the [-Z''(ω) x Z'(ω)] data [11].