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A fabric made of jute, a natural occurring fiber, was used as reinforcement in a fine grained cementitious matrix with a low content of calcium hydroxide.
As can be observed in Fig. 4, with the increased number of layers, there is an increase of cracks.
The composite reinforced with 3 layers presented six cracks and the composite with 5 layers eleven cracks. 3 layers 5 layers Matrix (a) (b) Figure 4 – Influence of the number of layers on the tensile behavior of textile cementitious composites reinforced with jute fabric: (a) tensile stress and crack spacing vs. strain (b) photos of composites reinforced with 3 and 5 layers of fabric without treatment.
The composite with 5 layers with fabric impregnated by 50 min had the greatest number of cracks and smaller spacing. 5 layers treated by 10 min 5 layers without treatment Matrix 5 layers treated by 50 min (b) (a) Figure 5 - Influence of the treatment with polymer on the tensile of textile cementitious composites reinforced with jute fabric: (a) tensile stress and crack spacing vs. strain (b) photos of composites reinforced with 5 layers of fabric with treatment.
The composite with 5 layers with fabric impregnated by 50 min presented the greatest number of cracks with lower spacing.

In particular, ion nitrided specimens of relatively less softening condition showed reduction both the depth and number of cracks compared with the other surface conditions.
To improve the service life of the mould, past efforts have been towards the development of die steel grades offering better high temperature strength as well as toughness and towards suppression of grain boundary carbides during heat for die cavities [1, 2].
The parameters effecting on the thermal fatigue test such as heating rate, cooling time, maximum and minimum temperature, and number of cycles were fully computer controlled.
And the IN specimens of relatively less softening condition (500 °C/4 h, 530 °C/8 h) showed reduction both the depth and number of cracks compared with the other conditions.
The nitriding surface significantly reduced the both the number of total thermal crack and the Lm value of the surface with less softening condition.

The reason that should urge ceramists and cement people to cooperate is that both ceramics and cementitious materials continue to be granular materials, whose properties are controlled by microstructure (grain size or porosity).
The grain-size distribution of aggregate is a key parameter to control packing efficiency.
In RPC, the improvement of rnicrostructure is obtained by eliminating coarse aggregates and increasing packing by carefully selecting the grain size of the different powders (cement, silica fume and quartz flour).
The answer to the fi rst problem is known: to work with an optimized grain-size distribution (coarse aggregates mixed with medium-size grains to fill the largest interstices and ultra-fine particles to fi ll the smallest interstices), to use a low water/solid ratio, and to add superplasticizer.
Chemical processings like precipitation, coprecipitation, hydrolysis, pyloysis and/or physical processings like evaporation, burning and spraying, might give larger supersaturation to bring about formation of a huge numbers of nuclei.

RHA reshapes the grains of aluminium alloy, as previously indicated.
Grain size is inversely related to tensile strength, according to the Hall–Patch relationship.
As grain refines, it is discovered that the amount of space available to withstand external forces and boundaries expands.
Most of the particles were discovered within grain boundaries.
RHA particles created places where grains started to form, which made it possible to refine the grains in the aluminium matrix. 2.

As for Reynolds number, a more accurate explicit equation proposed by Zigrang and Sylvester has been used here.
The same terminal velocity equation has been used in Das’s model to track the movement of particles, but there are some differences in the determination of Reynolds number.
A correlation is used by Das for the determination of the Reynolds number as a function of Archimedes number
(3) Where The latter is the dimension-less Archimedes number.
Free settling tests of 25 samples, which is narrow density and narrow size level average grains, were undertaken.

., grained puerarin MEKC standard equation: Y=36.522X-471.9, R2=0.9994(N=5), the puerarin concentration in 550 μg/mL to 750 μg/mL range comes out a good relationship.
One was internal factors that including isoflavonoids molecular size, the number and location of the free hydroxyl groups on the skeleton, connected with the skeleton of the number of glycosylation, type and location, ionizable site (e.g., a sulfonic acid group).Another was the external factors, including the buffer solution, and additives, etc.

To resolve main difficulties encountered in demulsifier research today, such as demulsification of viscous crude oil emulsion, demulsification of chemical flooding emulsion, some research value routes, such as increasing aromaticity, molecular weight and branch degree of demulsifier molecule, and leading double-function groups meeting W/O type and O/W type emulsion and groups with alkyl carbon number matching equivalent alkyl carbon number of the crude oil into demulsifier molecule, were suggested according to demulsification mechanisms and their emulsion characteristics, and action mechanisms of the above-mentioned research routes were elaborated at the same time.
The solid particles in the interface films of heavy oil emulsion, such as asphalt, paraffin grain, clay particles, metal salt particles and mechanical impurities, are of high content due to the high content of heavy oil asphaltene particles and the strong carrying capability of heavy oil on solid material, which increase the stability of emulsion.
The emulsion state of produced liquid have a qualitative change: oil-water emulsion changes from W/O type in early stage of oilfield to O/W type, and complex multiple emulsion that O/W type and W/O type coexist is also in the liquid, and produced liquid contains a large number of fine O/W emulsion that is difficult to coalesce and separate.

Welding is known to create tensile residual stresses, promote grain growth, recrystallisation and softening in the heat-affected zone (HAZ) [6,7], and to introduce defects that act as stress concentrations and preferential crack initiation sites.
A frequency of 1 Hz was used for all fatigue tests and the number of cycles to failure (N) was recorded for each specimen.
The number of cycles to failure (N) was recorded for each stress range (Ds) at the end of the test.
The HAZ and weld metal, characterised by large grain sizes and coarse second phase particles, were therefore found to be more prone to pitting than the base material [16].
As expected, the number of cycles to failure (N) increases with a decrease in the applied stress range (Ds).

Hierarchical clustering is known that can obtain multi-level clustering structure of different particle size, by which, we can get small number of radar signals drown in many radar signals.
By using data field to determine the cluster center and cluster number, the appearance of false alarm and missed alarm caused by lack of lack of prior information of the cluster centers and cluster number can be avoided to a great extent.
Then deinterleaver the signal sample with traditional cluster algorithm, in which we assume that the category number is 4.
Sorting Result of Improved Algorithm Based on Data Field Serial number 1 2 3 4 Actual number of pulses 277 332 262 237 Number of pulses sorted 299 303 269 237 Number of pulses sorted correctly 277 303 262 237 Number of pulses missed 0 29 0 0 Number of pulses sorted wrongly 22 0 7 0 correctly sorted rate 97.38% CONCLUSIONS It's difficult to sort signals of new radar systems, of which number differs greatly.
Experimental results show that the method can avoid the influence caused by that number of pulses received differs greatly.

Algeria is today faced with an ever increasing problem of providing adequate yet affordable housing in sufficient numbers.
Grain size distribution.
Figure 10 shows the percentage of weight loss with the number of wetting-drying cycles for static and dynamic compaction.
This figure indicates that the weight loss increases with the number of cycles.
Even for dynamic compaction, with an incorporation of 5% cement content, the weight loss evolves according to the number of cycles of wetting-drying.