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Text can be decomposed into a number of featured items to express, generally included in the basic text language units (words, phrases, words or phrases) which indicate that the text D can be expressed as D=D(t1, t2… tn), Where t1, t2…. tn represent each feature items;3.
Results Of Comparison Experiment Of Feature Selection Methods Earn Acq Money-fx Grain ECE 0.793 0.814 0.852 0.854 CHI 0.851 0.838 0.816 0.783 WE 0.782 0.842 0.828 0.849 OR 0.857 0.894 0.871 0.887 According to the results it is clear that when the value for binary classification, OR item selection method relative to other features of the method, the greater the advantage.
Traditional and TF-IDF formula, TF value tfjk means the Statistics Number which feature items tj appears in the document dk.
If this number was given different coefficients depending on the location, the feature items for different importance in different locations can also be reflected.
Therefore, the position of the previously described nine coefficients were given: λ1, λ2......... λ9.Then the number of times each statistical feature items that appear in different locations:tf1 , tf2,.......tf9.

For important compaction energies, exceeding the optimal one, the over-compaction can lead to the disintegration of grains and then the granular structure is not as resistant as the initial one.
In HEB 195 [14], the choice of the press depends on the desired pressure and the number of units produced per day.
Three specimens were prepared for each number of blows (25, 56, and 100 blows) (Table 4).
Using a scanning electron microscope (SEM), it is shown that the grains, after stabilization, form a honeycomb structure which is a result of the hydrates precipitation on the surface of the grains.
Table 8 shows the difference between the RE technique and PEB in terms of execution time, materials, and number of workers.

The results showed that changes of PH value has significant effect on the specific gravity of soil grain, the limit moisture content , maximum dry density, and strength characteristics of loess.
Especially with the number of motor vehicle accelerating, the city build expedited and the serious air pollution, acid rain increased [1], the problem of loess contaminated by acid is prominent.
The possible reasons are as follows: with the increase of acid concentration, a large number of cations will change the chemical balance in soil. thickness of adsorbed water will reduce ,the diffusion layer to thin, plasticity of soil are weak, so the liquid, plastic limit and plasticity index will decrease.
In the liquid limit of soil, containing a large number of water molecules, the colloid ion precipitation reduced, it has little effect on the liquid limit.

The lake basin shrank and water became shallow and the edge of multi-Delta basin formed a single entity, shaping a braided lake forwarding delta sediment system, of which the nearby distributaries channel shore were mostly thick-massive fine-grained sandstone [1].
Grained fine contains mica feldspar sandstone.
The authigenic quartz is the gap filling occurrence, illite has been distributed in intergranular, chlorite pore lining occurrence, siliceous and feldspathic to increase output or to grain filling in pore, zero base, particle, point - line contact, cementation type is mainly the pore type, etc. 1.3 Feature of the reservoir physical property 1.3.1 Porosity features According to the porosity analysis of 232 samples in the Dongrengou region, the maximum porosity of Chang 2 reservoir is 21.4% and the minimum is 4.7%, the average is 14.9%.
Table 3 Results of composite plugging organic and inorganic acid blockage plugging core number formula（%） permeability（μm2） damage（%） effect（%） CLO2 HCL HF K0 K1 K2 K3 K4 17-1 3.0 12 2 101.20 0.13 31.86 50.25 56.37 99.87 55.7 17-2 3.5 14 2 99.85 0.11 38.07 62.49 68.50 99.89 68.6 17-3 4.0 16 3 97.64 0.09 41.36 68.06 74.99 99.91 76.8 17-4 4.5 18 3 105.10 0.14 50.14 80.39 89.12 99.87 84.8 17-5 5.0 20 4 106.40 0.15 55.32 82.68 91.40 99.86 86.9 According to experimental data in table 3, the composite plugging acid solution is effective in removing organic and inorganic blockage.
Project number: 2013JK0877.

In order to ensure the safety of high strength steel components, it is necessary to conduct further studies on the fatigue behavior and fatigue mechanisms of high strength steels at the numbers of cycles from 108 to 1012.
They show that fatigue failures take place at the numbers of cycles above 107 even 109, which means traditional fatigue limit does not exist.
The shape of S-N curve could be affected by specimen shape, loading characteristics, inclusion size and number of samples.
They show that the area of ODA and number of cycles are related to hydrogen content.
In the interior, a strain concentration will somewhere exist between grains at a location where: (i) a small inclusion or precipitate is lodged between two or three large grains; (ii) long grain boundary; (iii) a combination of (i) and (ii).In interior strain concentration zone, it is possible for a very short Stage Ⅰ- and then a Stage Ⅱ-oriented type of crack to initiate and propagate.

We then have a number of consequential relations between the phenomenological coefficients such as: LiA + LiA' = LiB + LiB' , (3) - oxygen ion -A, A' cations -B, B' cations 1 Ar r2 Ar r 1 Or r 2 Or r Br r where i = A, A', B, B', O.
In Figure 4 we present results of Monte Carlo simulations for the ratios of the tracer diffusivities for a number of combinations of exchange frequencies.
We consider open system conditions where the system consists of fine grains with enough short circuits for the vacancies everywhere to very quickly establish equilibrium according to the external oxygen partial pressure [11].
If this mechanism is the main diffusion mechanism for bulk diffusion then obviously there will not be any demixing effect in the bulk: at least no detectable movements, but it is still possible to have some atomic segregation at opposite sides of grains.
On the other hand, if only one cation vacancy is involved in the cluster mechanism then there will not be any tendency for demixing inside the grains.

Sn and Bi grains with purities of 99.999 at% (Kojundo Chemical Laboratory Co., Ltd.) were weighed for each standard sample.
Sn and Bi grains with a purity of 99.999 at% (Kojundo Chemical Laboratory Co., Ltd.) were used to prepare a diffusion couple.
The nominal c0 value was set to 10 at% by adjusting the weights of the Sn and Bi grains.
The number of measurement points was set as two in order to determine the two unknown parameters corresponding to the diffusion coefficient and initial concentration at the measurement point immediately after complete melting.
Acknowledgment This study was supported by a Grant-in-Aid for Scientific Research(C), Grant Number JP23K04364; Grant-in-Aid for JST SPRING, Grant Number JPMJSP2128; Waseda Research Institute for Science and Engineering; Grant-in-Aid for Young Scientists (Early Bird); and Grant-in-Aid for Research Activity Start-up, Grant Number JP24K23035.

A number of MWNTs were observed pulled out from the alumina matrix.
The alumina grains became more rounded and more pores (indicated by arrows) could be found in Fig.3B.
On the fracture surface, MWNTs were observed pulled out from the matrix, but their number was relatively less compared to the number of MWNTs in Fig.2B.
This lower density and fewer numbers of pulled-out MWNTs caused the catastrophic decrease in bending strength.

On the basis of numerical methods, the mutually dependent parameters or variables are solved in the finite number of the nodal points of the discretization mesh in calculated domain.
The numerical methods enable us to find the solution of the physical variable for the specific number of discrete sites (nodes) in relation to the selected differential mesh (finite element mesh) and it is in connection with the whole domain and surface part of the created geometrical model.
The basic principle of FEM is based on the fact that the arbitrary continuous variable (e.g. temperature, velocity, etc.) is substituted by discrete model which is defined as a set of continuous functions (polynomials) with reference to finite number of sub-domains (elements).
The searched functions are approximated by polynomials in the boundaries of the each one sub-domain in such a way that the coefficients of the approximating polynomials are expressed by the values of searched function in the finite number of the nodal element points.
After the evaluation of the nine samples under the different stresses on the basis of the temperature and time effect, it can be concluded that stainless steel (designated as STN 17 248) is able to operate for short time (for ~1 hour) at 900°C, but when the holding time is increased at the same temperature, the grain coarsening is observed and it can have negative influence on corrosion resistance as well as mechanical properties of the tested material.

Title of Publication (to be inserted by the publisher) Scaffold Fabrication The polymers foams were impregnated with the following suspension: 88,4 g of TiO2 powder (Kronos TiO2 No 1171, Kronos Titan GmbH, Leverkusen, Germany) with a median grain size of 0.3 µm mixed with 25,8 g deionised water.
Results Foam structure The macrostructure of the sintered scaffolds is characterised by a fully open structure for both ppi-numbers, although a very low number of closed cells is always present.
The tortuosity, which was measured in the mercury intrusion meter, was several factors higher for 60 ppi scaffolds compared to 45 ppi and therefore do also explain the lower permeability for higher ppi-numbers.
The pore size is easily adjusted by using polymer foams with different ppi-numbers.