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Introduction Rough set theory is a mathematical theory of reasoning about data which can be also used to deal with vague and uncertain problems [1].
Computing core and attribute reduction are very important issues of rough set theory.
For many algorithms on attribute reduction, the core is usually calculated at first, and then heuristic knowledge is combined with core to find the reduction.
Decision table reduction based on information entropy [J].
A quick attribution reduction algorithm with complexity of max {O (|U| |C|), O (|C| 2 |U /C|} [J].

In this study, reduction-oxidation cycles under different temperatures were analyzed.
The kinetic of the reduction reaction for oxygen carriers has been carried out by using TGA.
Seen from the DTG curves, there were two obvious weight loss peaks at about 450 °C and 790 °C respectively during reduction stage.
TG curves Figure 2 (a) Non-isothermal reduction curves between Fe2O3/γ-Al2O3 oxygen carriers; (b) CO at different temperatures.
The non-isothermal kinetic data were analyzed by using Coats-Redfern equation.

Multi-staged combustion was demonstrated as a practical NOx reduction method in the late 1970s [1].
Nitrogen element in liquid fuel is converted to nitrogen gas molecule through gasification reaction in reduction condition.
As shown in the data, the peak temperature region is situated around center of the flame, which is around 1200℃.
As shown in graph, this new type of burner has two major advantages in NOx reduction over other conventional burners.
The new type multi-staged liquid burner with partial oxidation shows very good performance on pollutant formation and reduction.

(1)data integration: data integrationist he main operating environment in multi-file data consolidation, such as the registration number data files, performance data files, historical data files
(2)data cleaning: cleaning up the data source data set to remove the noise data and related data, handle missing data and clear Wash dirty, remove the blank data fields.
(3)data transformation: transform the data to find if the number of features of HSBC, using conversion method with dimensional change to reduce the effective variable, or Find the data invariant, including normalization, reduction, switch, and projection operations fern. 2) Attribute reduction module Some data attributes have no effect on the extraction of these properties will greatly influence the choice of adding efficiency and may even lead to the selection bias.
Therefore, effective data reductions are necessary.
The goal of data reduction which is based on the selection task and the understandings of the contents of the data itself are to find the target depends on the characteristics of expression data useful to reduce the data size, so as to maintain the data in the original premise of the maximum amount of data to streamline.

In the second part of the combustion face, reduction reactions are occurred (endothermic reaction), is called reduction zone.
, based on the obtained heat and mass balance calculations data, is carried out as to application of certain blasting interfusion types for effective underground gasification process management.
(10) where: – the average heat flow in 1 m2 of the surface rock walls channel by radiation and convection, J/m2, Sn – the surface of the coal channel, m2, τ – time for coal seam gasification to the coal channel width, s, Qi – the intensity of gasification, kg/s; Q5 – additional heat losses into the environment (unaccounted losses), made on the basis of practical data.
This greatly simplifies the data processing and allows to quickly obtain end-results with a high degree of compliance.
Definition of the Mississippian–Pennsylvanian Boundary in the Lviv–Volyn Coal Basin (Western Ukraine), Based on Palynological Data.

At first, the point cloud data of blade were gained using ATOS optical scanner.
Secondly simplified, smoothed and partitioned in Imageware, point cloudy data were created into curves.
Not enough data can bring errors.
Reversely too many data will fall run speed to affect later analysis work.
In reversing engineering, cloud data acquisition is crucial first step.

The test data by Kodur [7] indicated that the addition of PP fibers improved fire resistance of concrete.
This paper contributes to the literature by supplying very unique data to understand the compound concrete materials incorporated a cocktail of steel fiber and PP fiber.
The raw data are presented for future reference and proposed equations may be adopted in the design codes.
Based on the test data in this study, and are determined by the least square method as 8´10-8 and 2.41, respectively.
Limited by the test data, the equation is only applicable in a temperature range of 25℃{TTP}8451 to 800℃{TTP}8451 .

Under the hydrogen charged, the reduction of strength and ductility of the steel revealed from the ultimate tensile strength value and percent of elongation were observed as the current density increased.
The embrittling effects may alter the mechanical properties and it appears as a reduction or loss in ductility accompanied by degradation and damage on the surface and internal structure.
The tensile properties, such as yield strength, ultimate tensile strength and ductility (% elongation) were determined from the tensile test, while the data on the maximum load and bend angle were obtained from bend test.
The relative reduction in the ductility and strength are presented in Fig. 5.
It is observed that increasing current density causes a reduction in both maximum load value by 16% and bend ductility (angle) value by only 7%.

Compared with the acidic environment, alkali condition resulted in far faster hydrolysis, caused more reduction of fiber diameter and strength.
Temperature (oC) PH value Time (min) 1 90 5 20 2 90 7 30 3 90 10 40 4 110 5 30 5 110 7 40 6 110 10 20 7 130 5 40 8 130 7 20 9 130 10 30 Data acquisition Hydrothermal process: Samples of PLA fiber were divided into 9 groups, which were treated in different temperatures and PH values with XW-2000 series prototype.
To study the diversification of fineness and its impact on the strength reduction, the fineness was tested and the result is shown in Table 4.
Compared with the 8th sample, though the heating time was only 30 minute, but the strength reduction was100%, which indicated that the temperature and alkaline could affect the capability of the fiber apparently.
The test of between-subjects effects revealed that temperature was significant to the strength reduction of PLA fiber.

However, the addition of more than 3 % MgO filler loading caused a reduction in the ferroelectric and dielectric properties of the nanocomposite thin films.
As the percentage of nanofiller loadings increased to 5 % and 7 %, significant reduction in Pr values, 69 mC/m2 and 57 mC/m2, a drop of 22 % and 35 % were observed, respectively.
The agglomerations produced inconsistent surface morphology which led to the reduction of contact area between electrodes.
An abrupt reduction of dielectric constant may be seen as the MgO a loading was increased to 5 % and 7 %.
Prabu, Ferroelectric P(VDF/TrFE) Ultrathin Film for SPM-based Data Storage Devices Solid State Phenomena, 2007. 124-126: p. 303-306