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Low threshold make mining grain size small, but increase working time.
So, the system can customize topic grain size based on users’ demand.
The measure needs to calculate the total number of documents, doc number of each cluster and doc number of a cluster after deleting all documents of selected clusters.
Calculating these numbers seems very complicated.
S is total number of selected words.

Additionally, large numbers of grain boundary provide a short cut for heat energy to diffuse from shear zone to the inside of workpiece and promote the deformation of workpiece material.
The coordination numbers in workpiece are marked by different colors.
The atoms with coordination number seven and eight lie in shear zone and the coordination number more than eight seems mainly located at the tool-workpiece interface.
That is to say, any atoms with coordination number more than six can be treated as metastable phases.
The overcoordinated atoms are coded by according to the coordination number.

Diverse-grained information such as the abstract, description, interface, packages have been put forward on basis of resource virtualization technology of manufacturing grid in order to implement resource virtualization.
And essential attribute includes mark number, name, supplier, model, category and so on; Performance properties is a description of resource performance parameters and different types of resources have different performance; And it also has resource trading mode, cost attribute and some outward appearance size and so on.

A number of mechanisms have been proposed to understand stress corrosion cracking (SCC) of metals, e.g. (1) slip dissolution and active pass corrosion based on anodic dissolution of metals, (2) tarnish rupture and internal oxidation based on oxidation ahead the crack tip followed by cracking of the oxides, and (3) hydrogen cracking, etc.
The cracking has been caused by sensitization in welding heat affected zones due to Cr depletion along grain boundaries [1].
However, in recent years, a great number of SCC incidents have been observed in core shrouds and re-circulation pipes made of L-grade stainless steel in Japanese BWRs.
To solve the SCC problem, a great number of studies about SCC mechanism on stainless steels in high temperature water have been done from the points of view of material, mechanical, and environment [2].

But with the use of calcined hongurin there is a slight decrease in the water resistance of the rock: in the optimal composition from 0,96 to 0,87, it is explained by the decrease in the activity of hongurin due to the reduction in the number of active groups, and the resulting new centers have a Lewis character.
For this purpose according to the plan of a full-factor experiment 9 compositions with two variables were prepared: X1 – temperature of calcinating of zeolite (°C); X2 – the number of the plasticizer (the % of binder's weight ).
This can be explained by the fact that when zeolite-hongurin is heat treated, the number of active groups reduces in it, and the resulting new centers have Lewis character, i.e. their activity decreases [20].
Morozova and Kays Hamza Abdulmalek, About a role of natural zeolite on durability of fine-grained concrete, Bulletin of the technological university (Kazan). 19(10) (2016) 64–68

Descriptive numbers (parameters) can be attributed to every emission event.
The basic means of description is the number of emission events per a period of time.
It is assumed that the number of AE events corresponds to the number of microcracks that form inside of the material but no knowledge is available as to their orientation.
Fig. 3 shows the number of AE events recorded during the Ec test.
A smaller number of events and by extension microcracks is probably indicative of less solid bonds in the material’s matrix.

A number of experiments were carried out in a tubular furnace to investigate the ash corrosion characteristics.
When the temperature was above 550℃, the intergranular attack enhanced, and the more content of carbon in the grain boundaries, the more serious the corrosion is.

The investigated mixtures were numbered from 10 to 14.
Therefore, the mixture number 10 used a standard amount, without fine adjustment of oxides.
This resistance is assessed by using integer number from 1 to 5.
The lower the number, the better the resistance.
[6] ISO – International Organization for Standardization – ISO 719 – Glass Hydrolytic Resistance of Glass Grains at 98oC, (1985)

Background image can be represented as, x and y are the row and column numbers of pixels in an image
And the number of connected domain is counted.
If the number of connected domains is larger than 0, the current frame contains the flour bag.
That is, the total number of pixels is calculated.
Grain Processing, 2011, 36(1):66-69

Liou et al. [95] reported variation of grain size with sintering time and temperature.
In fact there is a linear correlation between grain boundary conductivity and porosity.
Moreover, this technique produces large grains (1-10 µm) which are clearly a disadvantage as uncontrolled crystalline growth can occur, which could induce chemical and grain-size non-uniformity [102].
Composite anode The material selection for an SOFC anode is determined by a number of factors.
The transport of oxide ions within the electrode material is beneficial concerning the number of possible reaction pathways.