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Its movement form is equivalent to a pair of gears transmission which the surface of the gear-honing-tool is adhered a layer of grinding grain.
Going a step further, the affection degree to the quality of tooth flank about the grain size of CBN had been studied by the means of experiment.
Table 1 The standard parameters of gear honing tool and workpiece gear Items Modulus [mm] The Number of Teeth Helical Angle The Pressure Angle of Graduated Circle Tooth Width [mm] the honing wheel mn=3 14.076 degree 20 degree 25 the gear workpiece m=3 26 0 degree 20 degree 33 Fig. 3 The distribution of contact line at the tooth flank It can be seen that the contact-line is a space curve at the involute helicoids of tool, and its theoretical shape has some connection with the geometric parameters of gear honing tool, and then the contact-line distributes along the diagonal direction of the tooth flank, the CBN abrasive shedding phenomenon is more serious near the contact-line region for the electroplating honing tool, while the CBN abrasive in other regions of the tooth flank is almost not involved in cutting process.

When the Reynolds number increases the thickness of the underlayer is reduced.
The influence of the roughness on the hydraulic resistance increases and becomes dependent both on the Reynolds number and on the average roughness height on the surface of the pipeline.
A further increase in the Reynolds number transfers the pumped liquid to the turbulent flow regime, in which the sublayer completely collapses, and the friction depends only on the roughness.
The value of the coefficient of hydraulic resistance λ is determined by the formula simplified by the authors, having the form: (2) where - the number of similarity regime of fluid motion.
The generalization of a large number of results of field studies made it possible to establish a mathematical relationship between the coefficient of equivalent uniform grain roughness Ke and the altitude parameter of physical roughness Ra: Ke = 2 Ra1,33 (5) When determining the value of λ in each of the parameters in formula (2) - b, m and n, the calculated internal diameter of the pipeline (pipes) din is also included.

The WNZ experiments extensive plastic strain and softening, and usually results in a fine equiaxed grain recristallized structure.
The TMAZ experiments a lower level of plastic strain and is a relative small region surrounding the WNZ with a distorted grain structure.
Although there are a considerable number of references in experimental works related to FSW process, relatively, a reduced number references on modeling and numerical simulation of the process are available.

Each appraisal factor regarding various ranks degree of membership formula respectively is (3)~ (5) Regarding bigger the target , the water resources supporting capacity level more low appraisal factor, the degree of membership for various ranks relative function formula will only have above right margin the formula the ui sector number "<=" to change ">=", after "<" will change ">" And use the similar computation.
different level year Analysis of Criterion level of water resources supporting capacity appraisal target system separately, we know: In the water resources subsystem, the V2 level's subjection parameter of the Subsystem Appraisal factor Weight V1 V2 V3 Water resources Subsystem Average per person water resources（m 3/ per person） 0.1517 <1700 2850 >4000 Water resources use factor（%） 0.0506 >30① 25 <20① Average person water consumption（m 3/ per person ） 0.0303 >800② 600 <400 Ecological environment subsystem Forest grass coverage fraction（%） 0.1425 <15 37.5 >60 Sewage treatment success rate（%） 0.0626 <20 55 >90 The ecology needs water rate（%） 0.1437 <25 37.5 >50 Social economy subsystem Rate of natural population growth（%） 0.0795 >9.5③ 5.8 <2.1③ Urbanized level（%） 0.0203 <20 45 >70 Average perperson GDP（dollars/people） 0.1139 <400 2200 >4000 ThirdproducesaccountsfortheGDP proportion（%） 0.0609 <30 45 >60 Average per person grain
In the ecological environment subsystem, it is estimated that the V3 level's subjection parameter of sewage treatment success rate is 0.286 in 2010 and the number increases to 0.5 in 2020, Other evaluating indicators is all developed towards the benign tendency.
In the socio-economic development subsystem, the average per person GDP evaluating indicator will achieve the ideal carrying capacity in the future twenty years, it rises from 973$ per person in 2000 to 2434$ per person in 2010, 5239$ per person in 2020; The basin growth rate of population drops gradually; The urbanization level improves from 44.3% in 2000 to 50.11% in 2010, 60.87% in 2020; Third products accounts for the GDP proportion 32.3% in 2000 increases to 36.6% in 2010, 38.5% in 2020; According to estimate, per capita grain amounts of river basin will reach 410 Kg/ person in 2010 and 420 Kg/ person in 2020; The water beneficial result improves to 111 yuan/m3 in 2010 and 163 yuan/m3 in 2020 which is 69 yuan/m3 in 2000.

Slag-forming additives (limestone, dolomitic limestone and dolomite) are used to facilitate the formation of slag, which are added to the blast furnaces. [2, 3] The basic chemicals forming blast furnace slag are lime oxide (35-40%), silica (approximately 40%) and alumina (about 10%), magnesium oxide (about 10%) is also included and a number of trace compounds and elements.
The resulting Los Angeles coefficient is in Table 1, which also contains details of the weights before and after the test. [8] Table 1 Determination of the Los Angeles factor Fraction of aggregate [mm] Input weight [g] Weight after LA test [g] Residue on sieve 1,6mm [g] Number of steel balls [-] Weight of steel balls [g] Coefficient LA [-] 8 - 16 5002.6 4928.4 4139.9 10 4311.6 17.2 4 - 8 5001.3 4936.7 4048.1 8 3527.4 19.0 The producer has determined LA crushing resistance only for a fraction of 10 - 14 mm and declares it in technical sheets for all other fractions.
Table 4 Basic physical and mechanical properties of aggregate Fraction of aggregate [mm] Bulk density of aggregate [kg.m-3] Free flow bulk density [kg.m-3] Tapped bulk density [kg.m-3] Aggregate spacing - free flow [%] Aggregate spacing - tapped [%] 8-16 2510 1180 1370 53.0 45.4 4-8 2500 1170 1380 53.2 44.8 0-4 2500 1430 1620 42.8 35.2 Table 5 Porosity of slag aggregate Fraction of aggregate [mm] Density [Mg.m-3] Bulk density of aggregate [Mg.m-3] Porosity [%] 8-16 2.99 2.51 16.1 4-8 2.99 2.50 16.4 0-4 2.99 2.50 16.4 Table 6 Shape index of slag aggregate Fraction of aggregate [mm] Test sample weight [g] Cubic grains [g] Non-cubic grains [g] Shape index 8-16 1330.3 1287.2 43.1 3 4-8 121 116.2 4.8 4 0-4   Table 7 Granulometry of slag aggregate Fraction 0-4 4-8 8-16 Sieve[mm] Percentage passing [%] Percentage passing [%] Percentage passing [%] 31.5 100.0 100.0 100.0 16 100.0 100.0 99.5 8 99.9 86.4 0.6 4 91.6 1.9 0.3 2 51.8 0.1 0.3 1

Besides, there is a number of industries that require maintenance of low dust levels, which is achieved by facing the interior surfaces with expensive materials, such as marble.
Determination of electrical conductivity of samples using E7-20 meter RLC Results and Discussion It was noted that the fluorohydrite matrix had a large number of micropores, filled with pore solution containing sodium cations.
Repin - Modification of the structure and properties of fine-grained concrete with carbon black dispersion/ [8] Yakovlev G.I., Pervushin G.N., Gordina A.F., Shaibadulina A.V., Saidova Z.S., Protodyakonova T.L., Buryanov A.F., Nikitina S.V. - Structure modification and properties of gypsum binder dispersion of technical soot / Intelligent systems in production. 2019.Vol. 17.
E.M.M. - Fine-grained concrete modified with a suspension of chrysotile nanofibers / Building materials. 2019.No 1-2.

Another factor contributing the stability of the mechanical properties after long-term heat treatments is grain size which substantially does not change.
The results of fatigue tests are displayed in Fig. 7; they show that the heat treatments at 600 °C produce a progressive reduction of the number of cycles to failure Nf as the exposure time increases.
( ) fff �A α ε =max (2) ( ) ( ) mm fm f ult m �B� E A β ασ ε + =max (3) Heat treatment Mean thickness (µµµµm) As-fabricated 0,85 400 °C, 100 hours 0,86 400 °C, 500 hours 0,95 400 °C, 1000 hours 0,98 600 °C, 100 hours 0,94 600 °C, 500 hours 0,97 600 °C, 1000 hours 0,98 being εmax the maximum deformation imposed to the probe, σult and E the ultimate tensile strength and the Young's modulus of the matrix, Nf the number of cycles to failure, αf, αm, βm, Af, Am and Bm parameters to determine by the statistical regression analysis.
The stability of fibrematrix interface and of grain size guarenteed to the composite material to maintain its original mechanical properties upon prolonged heat treatments. 3 - Fracture surfaces show plastic deformation of the matrix and pull-out of fibres, i.e. a correct load transfer from the matrix to the fibres. 4 - SEM observations showed that the growth of reaction zone between carbon coating and matrix following heat treatments is quite slugghish.

They feature a high mechanical and dynamical strength due to a process-related grain refinement as well as an unbroken and shape-adapted grain flow.
The elements consist of different materials and feature different surfaces and the number of elements inside one billet varies depending on the length of the elements, see Tab. 1.
Acknowledgments This work is based on investigations of the research project “Component Optimization by Forging of Composite Aluminum Extrusions” (DFG, Project number TE 508/17-1, BE 1691/102-1) in collaboration with the subproject A2 “Composite extrusion” of the SFB/TRR 10, funded by the German Research Foundation.

Introduction Materials intended for the radiation protection of nuclear power plants (NPP) must have a number of specific properties.
As a detector, a scintillator is used in the form of a disc, which is a solid suspension of ZnS{Ag} grains in a hydrogen-containing medium; - Radiometer-dosimeter MKS-01R with a BDKN-03 detection unit was used to measure the density of thermal neutrons (Ff) streams and the density of the total neutron flux (Fint+f).
As a detector in the BDKN-03 block, a SFL5-6 light-stage base is used, which is a mixture of lithium fluoride with ZnS{AG} grains, which is dispersed in the disc from the plexiglass
Acknowledgments The reported study was funded by RFBR, project number 19-38-90024.

The quicklime with grain size 0-22.4 mm was prepared in a (semi-industrial) rotary kiln.
A layer of C-S-H phases is formed on quartz grains.
The use of finer lime fraction (0-1 mm) samples causes growth of the pores sized 375-500 nm, while lime fraction 11.2-22.4 mm results in less number of pores sized ca. 375 nm.
The number of particle interaction in fresh lime putty is the determining factor for its yield stress and plastic viscosity.