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An analysis model for edge rolling was established according to the data and rolling operating condition of a continuous hot strip rolling mill listed in Table 1.
Fig. 3 Influence of slab width on dog bone Fig. 4 Influence of reduction of edge roll on dog bone Influence of Reduction of Edge Roll on Dog Bone Deformation.
The influence of reduction of edge roll on dog bone deformation is shown in Fig. 4.
In the study, slab width is 750mm and reduction of edge roll is 60mm.
In the study, slab thickness is 160mm and reduction of edge roll is 60mm.

Based on the study [2] that used both the top-down (bunker sales data) and the bottom-up (fleet activity data) methods for its estimates, the annual fuel consumption for all ships was approximately 300 million tonnes in 2012, resulting in CO2 emissions of 949 tonnes, which equals 2.7% of global CO2 emissions for that year.
International shipping consumes mainly heavy fuel oil (HFO) – its share was of about 85% (data from the year 2012); when marine distillates accounted for nearly 15%. 
Also, significant reduction in NOx emissions are expected globally through Annex VI regulations – for newbuilt ships, since 1st January 2011 it is 20% reduction in NOx emissions (Tier II) and within ECA, soon – from 1st January 2016 – 80% reduction in NOx emissions is expected (fig.2).
Currently this is regulated indirectly by the sulphur reduction.
A similar reduction will be enforced for worldwide shipping by 2020.

This shows that numerical simulation can be a very good guidance on NOx emission reduction technology and staged-combustion precalciner structure design, and we can design and optimize the NOx emission reduction scheme based on numerical simulation to achieve the purpose of reducing NOx pollution in cement production.
Therefore, the generation of fuel NOx is determined by two kinds of competitive reaction that the oxidation and reduction of fuel NOx, and the formation mechanism is very complicated.
Boundary conditions of numerical simulation are based on the actual data that measured in actual production.
Considering a material decomposition circumstances, and combustion influence of rotary kiln, we made a numerical simulation of NOx formation in precalciner, and the results is tally with the practical data; 3).
Through the analysis of the control technology of NOx formation in cement production, it shows that numerical simulation can be a very good guidance on NOx emission reduction technology and staged-combustion precalciner structure design, and we can design and optimize the NOx emission reduction scheme based on numerical simulation to achieve the purpose of reducing NOx pollution in cement production.

Rough set theory is a soft computing method to solve imprecise and indeterminate data which is proposed by Z.Pawlak in 1982[5].At present, it is widely applied in research fields of machine learning, pattern recognition, data mining and so on.
Then, variable precision rough set model is proposed by Ziarko in 1993 [6].The model has certain fault-tolerant ability, and it is mainly used for solving classification problem of incomplete data.
So, initial multi-features set is in need of reduction.
The reduction set could be defined as follow.
The running speed is increased, and it is also able to guarantee that the feature attributes reduction set is the minimal reduction asked for.

Rough set theory is a new mathematical tools of dealing with vagueness and uncertainty, compared with the past to resolve the ambiguity of knowledge theory and methods, it does not require any outside required to handle data collection before experience, but only based on the classification ability of the observational data to address the inaccuracy of the data analysis and processing, as is shown by equation2
In fact, in the face of massive high-dimensional data size, more effective and efficient attribute reduction algorithm for the extraction of knowledge.
Data mining based on rough set theory is in its infancy, data mining and rough set theory research, there are many problems worth exploring, the paper will be a combination of both study certainly there are many imperfections, related work remains to be further study.
Summary The data is the processing center of the core business of most enterprises, a variety of external sources of data within the system to a large increase.
In reality, attribute reduction, information systems for the mitigation of large-scale data sets for enterprise management and decision-making pressure, with a certain degree of practical significance.

Jet generating system consists of three parts : high pressure pump station, walking control mechanism and a nozzle, signal acquisition system signal acquisition system is composed of a sound transducer, high speed data acquisition card and the acquisition and storage system.
In order to collect undistorted transmission of sound signal and carry on the analysis, we use the microphone and sound signal acquisition card to build high-speed real-time data acquisition system.
Hangzhou Aihua and AWA14604 type amplifier are chosen to constitue the sound test unit. and then connected to the BNC multi-function interface box, at last, through the NI company PCI - 6251 data acquisition card, the signal is transported into the computer.
Voice signal acquisition and processing software software are generated by LabVIEW software, the whole data acquisition and analysis system as shown in figure 3 below.
The provision parameters of water jet is as follows: jet pressure is 20 MPa, target distance is 100 mm, injection Angle is 30°,scanning speed is 1200 mm/min, effects of nozzle diameter on test results as shown in Figure 9-11 (data are from left to right, top to bottom).

As solid fuel burning mechanism fundamentals and kinetics are sufficiently considered in the works [15 – 20], it seems practical to consider only data obtained for coal burning kinetics in atmosphere with various oxygen contents.
The experimental data processing results provided the coal major burning rate, vf, min-1 , dependence on oxygen content in gas phase О2, %, and on the sample heating rate vt, оС/min, which is represented in the form of an equation describing experimental data with a probability of 0.95: .
The following date was calculated based on the iron and iron monoxide content in the roasted ore: the minimum possible iron content at complete oxidation Femin, excess iron amount β equal to difference, the maximum possible excess iron content at complete reduction βmax, iron reduction degree based on oxygen γ.
Even more noticeable reduction of β and γ roasting values is observed throughout the layer height (extreme values differ by 2 – 3 times).
Additional coal weight increase by 200 g in the layer (through ore weight reduction by this value) and roasting at the temperature of 1000оС (water cooling) allowed achievement of the maximum iron reduction degree equal to 21.05 %.

Thermal upgrading is the process for nickel extraction in selective reduction with holding temperature in low (300-500 oC).
After that, it was analysed by XRF Bench Top PANalytical Epsilon 3XLE (in the sample size 200 mesh, for raw after homogenization in ball mill for 8 h and for concentrate sample after magnetic separation and drying) with analysis data by Microsoft Excel 2016, XRD PANalytical X’Pert3 Powder (in the sample size 200 mesh, the 2q is in the range 10–80o with step size 0.05 and analysis data by High Score Plus).
This indicates that ash and volatiles have an important role in the reduction process.
Carbothermic Reduction Of Nickeliferous Laterite Ores For Nickel Pig Iron Production In China: A Review.
[16] Bahfie F., Manaf A., Astuti W., And Nurjaman F., 2020, “Studies On Reduction Characteristics Of Limonite And Effect Of Sodium Sulphate On The Selective Reduction To Nickel”.

The results indicate that with the pack rolling reduction increased, the grains were elongated more obviously along the rolling direction.
The average grain size decreased to 0.5μm with the sample of the 75% rolling reduction after annealing at 800℃ for 30 minutes.
In addition, the mechanism of the pack rolling on the grain size reduction was analyzed.
In addition, the mechanism of the pack rolling on the grain size reduction is analyzed.
It can be observed from the data that the volume fraction of martensite in the pack rolling plate is lower than that in the direct rolling.

The dome-covered helps to reduce the heating load by 79.3% on January 21st with annual average reduction of 92.9% and if the house is located in Yellowknife, the annual heating load reduction would be 56.3%.
Solar radiation is calculated using data from ASHRAE[15].
Fig. 3 shows a reduction of 79.3% in heating load on January 21st.
The simulation on the annual weather data shows an average reduction of heating load is 92.9% in Montreal and 56.3% in Yellowknife.
This reduction is due to: 1) collection of solar radiation inside the dome; 2) increase of the air temperature inside the dome as compared to the outside air temperature; 3) reduction of wind speed in winter due to the protection of dome enclosure.