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Crest factor reduction (CFR) is a technology of reducing the signal PAPR at the expense of some performance parameters.
The fundamental of PC-CFR is detecting signal peaks in the data block range of the signal amplitude greater than the threshold, generating cancellation pulses canceled with peaks, so that the peaks do not exceed the threshold.
Detect signal peaks in the data block range of the signal amplitude greater than the threshold.
Nonlinear transform approach to the reduction of peak-to-average. 2010, The University of Texas at San Antonio: TEXAS
IFFT-based techniques for peak power reduction in OFDM communication systems. 2008, University of Victoria

Iron reduction rate of Fe, Cu and Ni can be elevated to above 90% by smelting reduction, thus the comprehensive utilization of valuable metals can come true.
In this study, results of the “Double slag” smelting under the condition of smelting reduction have been analyzed from a thermodynamic point of view, and experimental verification of the possibility of “Double slag” smelting under the condition of smelting reduction also has been carried out. 1 Thermodynamic calculation According to the preliminary work the optimum conditions of the “Double slag” smelting reduction can be determined as follows: the slag basicity is 1.1, the adding ratio of JISCO slag is 10%.
Substituting the above data into Eq. 8, the content of manganese in liquid iron can be obtained as follows: . 3 Experimental study on smelting reduction In order to verify the results of thermodynamic calculations, smelting reduction experiment of the “Double slags” was carried out in the electric arc furnace with lining of L3.
Table 4 Tapping output and reduction rate of “Double slag” smelting Test number D1 D2 D3 Tapping amount/ kg 5.6 5.4 5.4 Reduction rate/ ％ 94.9 91.5 91.5 Table 5 Hot metal composition of “Double slag” smelting/ % Test result C Si Mn P S Ni Cu Co D1-T 3.84 0.17 0.21 0.022 0.034 0.85 0.420 0.001 It can be seen from Table 4 and Table 5, in the smelting conditions identified in this process, the iron reduction rate and hot metal chemical composition of double-slag smelting is relatively stable, the iron reduction rates were maintained above 91%, the reduction rate of Ni, Cu in hot metal is above the level of 95%.Compared with the calculational results in Section 2, the content of Si, Ni and S in the experimental results is close to the calculated results, while there are some differences between Mn content and the calculated results, which are mainly attributed to the following reasons, first, the test temperature in the bath is not equal to 1600℃, second, approximate calculation method
Conclusion (1) Test conditions are shown as follows: the weight of Jinchuan slag was 13.5kg, and the weight of JISCO slag was 1.5kg, the composition of the slag has the basicity of CaO : SiO2 = 1.1, the use level of reducing agent H4 was 1.8kg, smelting current strength was 1900A, smelting time was 20min, during the smelting reduction process, reduction rate of iron remained above 91%, the reduction rate of Ni, Cu in hot metal was above 95%; (2) Through thermodynamic calculation, it is found that the content of each element in molten iron of the calculation results is close to that of the experimetal results, thus the purpose of guiding experimental procedure has been achieved; (3) Low alloy iron produced by “Double slag” melting reduction can be smelted into high value-added spring steel.

So it can destruct the marine environmental factor data in a fast and effective way, and make the data be unrecovered, thereby prevent data leaks, ensure data security.
l Chemical corrosion damage method: using the chemical reagent, will drive disc magnetic medium corrosion damage, so as to avoid the data reduction.
l Data overwriting method: also known as data wipe division [7].
Data delete method can't completely clear data, use some special software recovery tools can make the data reduction; Strong degaussing method, burning high temperature destroyed method, physical damage method, chemical corrosion damage method these several ways need professional destroyed equipment or chemical reagent, and require manual intervention to remove storage media data destruction from buoys, it is unrealistic for marine environmental monitoring buoy data storage module.
Data overwriting Data overwrite method is based on the U.S.

Therefore, an advanced data analysis and processing tool (i.e. efficiency data mining technology) is introduced for analyzing and mining large amounts of data monitored with the smart industrial park system.
Data service In the smart industrial park system, the data in all automation systems is extracted, cleaned, transformed, and synchronized through the data integration, and also the data is converted into a unified model format and stored in the database.
From the data, knowledge is mainly extracted by data mining algorithm.
Preprocessing data Data preprocessing can be divided into data integration and data cleaning.
The grey prediction model and data smoothing processing are studied in depth, and also the processing correction methods of electricity data missing and abnormal data are proposed.

Reduction in area is a measure to determine formability on cold heading.
Reduction in area is affected by second phases and inclusions.
The test data of conventional ferrite+pearlite steel [6], tempered martensitic steel [6] and bainitic steel [7] are also plotted in Fig. 3 for the purpose of comparison.
This indicates that reduction in area determines the formability of screw heads.
[6] NIMS data base, Materials Information Technology Station, National Institute for Materials Science, Tsukuba, Japan

The paper first introduces the principle of equivalent damping ratio of the seismic response calculation methods in seismic specification of China and Japan, then analyzes and compares reduction of seismic response caused by the equivalent damping ratio in seismic specification of China and Japan by calculating data.
Then forecast the reduction of seismic response.
The degree of reduction of acceleration response spectrum which is calculated based on the Japanese seismic specification reduces less than that the degree of reduction of acceleration response spectrum which is calculated based on the Chinese seismic specification.
With the damping ratio increasing, the degree of reduction of acceleration response spectrum which is calculated based on the Japanese seismic specification reduces more than that the degree of reduction of acceleration response spectrum which is calculated based on the Chinese seismic specification.
Fig. 4 The reduction rate of acceleration response spectrum in China and Japan is changed with the period in different damping ratio Fig. 4 shows that additional damping ratio in China and Japanese can reduce the degree of reduction of acceleration response spectrum.

This can be confirmed by surface area (SA) data as provided in Table 1.
These results are in good agreement with SA data: higher total surface area of materials based on CNTs can facilitate the contact between catalyst and oxygen, resulting a higher electrochemical activity towards ORR.
The oxygen reduction peak disappeared when methanol is present in the electrolyte solution.
Kinetics of oxygen reduction, J.
Rhee, Oxygen reduction on composite FeOx nanoparticles embedded in porous carbon, Electrochim.

The system uses the thought of data mining, which can provide the decision-making basis for sports teaching; In addition, the system structure of three layers makes the system in good adaptability and function expansibility with reduction of the maintenance workload for later.
Clustering: The data in the database is a single data storage unit, the data can’t be a single meaning of the expression, that these clusters scattered data, induction, consolidation, thereby forming a meaningful subsets [1].
Data mining is the extraction rules based on a database or data warehouse shot data which is used to guide present and future actions.
Data mining is the use of data mining technology, mining process valuable knowledge from databases, data warehouses and other information in a massive database data.
Complete data mining process, including data standardization, data integration, data conversion, data mining, pattern evaluation, knowledge representation and so on.

The bioreactor systems are operated under increasingly stringent conditions through the reduction in the hydraulic residence time.
Biological sulfate reduction represents an option for ARD remediation.
Thereafter, the matrix-attached cells were detached in seven sequential steps comprising vigorous agitation for 2 minutes in reactor feed containing 0.4% (v/v) Tween® 20, demonstrated previously to remove the dominant fraction of the microbial community (data not shown).
The SEM micrographs of the colonised carbon microfibres and polyurethane foam corroborate the cell count data (Fig. 1) which indicates more colonisation of the polyurethane foam compared to the carbon fibres.
Marais, S.T.L Harrison, Biomass retention and recycling to enhance sulphate reduction kinetics.

Wavelet transform was introduced to the thermogravimetric data smoothing and differentiation analysis according to the experiment results, and the orthogonal test method was used to find the optimize wavelet parameter.
Adaptive wavelet Transform method was used to deal with thermogravimetric experiment data, and the reliability, validity result was contrastive studied compared to all kinds of traditional analysis methods.
Wavelet analysis denoising processing of thermogravimetric data According to the above experiments to get TG curve of grease in 5 ˚C /min, and calculated DTG curves as Fig. 1.
Choose a different threshold rules for noise reduction.
Wavelet transform is used to place DTG curve effective Gauss white noise, but also can speed characteristic signal retained very good burning, maximum close to the original data of the combustion rate.