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Most of these methods are used in three-phase symmetry voltage sag, but actually, in distribution network, more than 70% events of voltage sag are single phase reduction.
Recognition of voltage sag require high real time capbility, some complicate algorithms such as wavelet transform are not fit for it due to the great deal of data that is used in the calculation.
In this situation, a simple method due to first order difference of the limited sampled data can be used to identify different power quality problems, according to the corresponding characteristics of each problem.
Sample the voltage with a frequency of 256 sampling points per cycle, and process the data with the method above, the result is shown in figure 8.

The first part is dispatching calculations with dispatching expressions based on building type, data of elevator selection, and flow of passenger.
So Fig. 2 shows a reduction model of elevator traffic dispatching design.
So there are different data between them.
And the designers are easy to study and analysis historical data.

The evaluation of the data is made by calculating the interference contrast or the phase of the interference signal [11,12,13].
Figure 5: Cross-section profiles 1 and 3 of grain A (AFM) The comparison of the obtained data indicates that the white light interferometer results are remarkably higher than the ones from the AFM.
Tiziani: Fast algorithms for data reduction in modern optical three-dimensional profile measurement systems with MMX technology, Applied Optics 39 (8) (2000), 1290–1297.

From Fig. 1a and Table 1, Compared with the blank experiment, the anodic curves of the working electrode in the base electrolyte with the Cyproconazole shifted obviously to the direction of the current reduction, which implied that the organic inhibitors could suppress the anodic reaction.
The equivalent circuits used to fit the EIS data of copper disk electrode were shown in Fig. 2.
The solution resistance Rs, the charge transfer resistance Rct and the constant phase element (CPE) were fitted and their parameters calculated according to the equivalent circuits model and the data were listed in Table 1.
Equivalent circuits used to fit the EIS data of copper in the base electrolyte with different concentrations of Cyproconazole without (a) and with (b) Warburg impedance.

Fig. 2 DTV (left) and surface waviness (right) of the disc measured at zero speed Fig. 3 Disc surface waviness at speed of 170 rpm for wheel turning angle of 0o (left), 20o (middle) and 40o (right) (Note, 1st Row – Acceleration at brake pedal (left), axial steering (middle) and radial steering (right) 2rd Row – FFT plot (left), disc displacement (middle) and rotational speed (right)) Fig. 4 Measurement data during judder event at wheel turning angle = 0o Fig. 5 Measurement data during judder event at wheel turning angle = 20o Fig. 6 Measurement data during judder event at wheel turning angle = 40o Table 2 Vibration magnitude measured in the judder test Components Steering wheel (axial) (m/s2) Steering wheel (radial) (m/s2) Brake pedal (m/s2) Wheel turning angle 0o 0.888 0.005 0.0010 20o 0.747 0.006 0.0005 40o 1.461 0.016 0.0004 Conclusion This paper presents brake judder investigation using laboratory test rig developed by the authors.
Park, Mode and design sensitivity analyses for brake judder reduction, Proc.

Big Data is one of the big IT challenges of the current decade.
Managing these masses of data requires the use of new data management systems with efficient access methods.
Considered as one of the main sources of Big Data, wireless sensors used in networks offer a credible solution to the problem of Big Data management, especially its collection.
The authors use data collectionstations as CHs.
That information is crucial for the data routing process.

With the help of strain gauge equipment, experimental data were obtained on the forces acting on the rolls and the die of the CCRE-200 combined processing unit in the process of obtaining rods with a diameter of 5 and 9 mm.
The advantage of combined processing methods is the reduction in the number of metallurgical conversions and deformation stages.
The obtained data on electrical resistance are listed in Table 7.
From the presented data it can be seen that with an increase in the deformation rate, the electrical resistance also increases.
Experimental data were obtained on the forces acting on the rolls and the die during the production of rods. 3.

The lack of suitable methods of preparation surface, unequivocally guidelines concerning on preparations of surface under processing and data about choice of technological parameters are the basic problems.
Please consider additional cases for which it is possible to control distribution of strain by the following factors: an overview of regular asperities (triangle, arc and arc - line) and their parameters (height, vertical angle, radius of curves, etc.), gap of asperities, burnishing depth, the number of consecutive operations duplex. 3) The experimental results have confirmed the validity of introducing new technological operations yield reduction of surface roughness as much as 40%.

Also, the aim of the work is to improve the final product quality and operating properties in different types of design and minimize material requirements for different anthropometric data quality in optimal conditions.
Hsu, Numerical Prediction of the Weld-line-Induced Strength Reduction for Injection-Molded Part, CoreTech System Co.

Computer database refers to the organized, internal, unified managed, shared data group existing in the computer for a long term, which not only is the computer software system to manage and store the data in the data structure, but also is a new method for data management and technology.
First, the computer database can reduce the data redundancy; second, the computer database can realize the share between data; third, the computer data in the database is maintainable and consistent, and can ensure the safety and reliability of the data.
The database value lies in the data storage and sorting.
Some viruses will tamper the computer data, which may cause the data distortion of the database.
A large amount of information and data are stored in a computer database, and there is a part of the confidential information data needing to be strengthened and managed.