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Nowadays, this theory has successfully been applied to a variety of fields such as data mining, knowledge discovery, artificial intelligence, pattern recognition [1-2] and so on.
In order to better deal with the datasets with noisy data, it is essential to further present some extended rough set models that can be applicable to the (generalized) incomplete information systems with lost and “do not care” unknown attribute values.
Wu et al.: Dominance-based rough set approach and knowledge reduction in incomplete ordered information systems, Information Sciences,178(2008),p. 1219-1234.

Noise reduction is the necessary step to obtain clear, effective ECG.
The one-dimensional discrete wavelet transform can be achieved by the data through the high and low pass filter H and G, reconstruction process can be realized by data through the high, low pass filter K1 and C1 are shown in Fig.2.

In order to avoid the intensity of the vibration, we had to reduce the cutting data.
Fig.1 Milling chatter Fig.2 Regenerative mechanical model for milling During the milling experiment, we found that if we chose the machining data large or little, milling vibration was easy to happen and affected the accuracy and quality of the part’s surface seriously.
For the workpiece, with the reduction in wall thickness, the natural frequency reduced accordingly.

Because the electric arc was one of power distribution cabinet interior main breakdown hidden dangers before, if occurs in the breakdown electric arc or just appears in front of the indication can forecast, also can carry on the prompt forecast, and reminds the correlation personnel to take the practical effective measure to relieve the hidden danger promptly rapidly, this can maximum limit the disastrous ac cident which avoids the breakdown electric arc causing occur, thus the reduction life and property loses, this will have the extremely important social efficiency and the extremely high economic value.
In order to improve the accuracy of early warning can be more than one arc arc fault arc in the probes on the power distribution Cabinet for testing, and application of information fusion technology on properties of each probe data layer fusion, if detected before arcing sound and arc fault early warning system is started.
Decision Fusion-scenarios and Strategies.International workshop on data fusion, Beijing, China, 2002

By employing micromachining technologies, pMUTs offer advantages over conventional ultrasonic transducers such as size reduction, batch production with high precision, repeatability and yield, low cost and possible realization of complete systems-on-a-chip.
Fig.2 Membrane deflections against initial membrane deflection for dome-shaped pMUT model applied with a constant voltage of 10V In addition, by comparing the deflection data of the dome-shaped model with those of the conventional models reported in some literature, we found that the dome-shaped model can achieve a larger electro-induced membrane deflection than the conventional model can do [7].
Then the resonance and anti-resonance data are achieved with a frequency sweep analysis.

Low-angle X-ray powder diffraction (XRD) data were recorded on a Bruker D8 Focus θ-θ diffractometer using Cu Kα radiation.
As vanadium content increased up to Si/V ratio (Si/V=15), only the peak of (100) was detectable and decreased obviously, indicating the reduction in structural regularity.
The catalytic data were shown in Table 2.

In solid catalyzed reactions, internal (intraphase) diffusion resistances may be eliminated by reduction of catalyst particle size at the expense of high pressure drop in fixed bed reactors..
Serious consequences could occur if the laboratory data were taken in disguised regime or criteria were taken into consideration in disguised regime and the reactor was operated in different regime.
Therefore, serious consequences could occur if the laboratory data were taken in disguised regime or criteria were taken into consideration in disguised regime and the reactor was operated in different regime.

The data supplied by some contractors were surprisingly ambitious.
Value of data storage and averaging was set for 0:15 hour.
[5] Voelker, C., Kornadt, O., Ostrý, M., Temperature reduction due to the application of phase change materials (2008), Energy and Buildings, 40 (5), pp. 937-944.

The reduction of CO2 emission became a global issue[1,2].
Data Vol. 52 (3) (2007), p. 817-832
Data Vol. 17 (4) (1972), p. 465-468.

The main task of the central control system is the collection and processing of the monitoring station data, and dynamic control of ventilation according to actual needs.
Responsible for the specific task mainly has 5 aspects: ① request monitoring station monitoring instruction; ②the monitoring information feedback for processing; ③ according to monitoring data acquired to modify; ④according to the selected control signal, the control scheme will correspond to the actuator; ⑤Monitor working conditions by ventilation equipment, once an abnormal condition occurs, then start the corresponding processing program for processing or alarm.
In general,, in order to ensure that CO and smoke concentration shall not be in excess of requirements in the tunnel at this time, if it is to increase the number of wind machine, select add more as the system output value; if it is to reduce the number of wind machine, choose less reduction in both as the system output value.