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The catalyst which has the hollow micro/nano- structures, possess a large specific surface area.
Just because of this structure, increase the contact area of the catalyst.
TiO2 has some advantages of good chemistry stability, non-toxic, long service life, corrosion resistance, etc.
And, they put forward that the effective thermal conductivity of sintered perforated hollow sphere structures.
Its hollow spherical structure largely increases the specific capacity and improves capacity retention of lithium ion batteries.

This however can be transversely applied in other heat exchanging structures in future studies.
Following this path could help realize what advancements can be made using additive technologies and which scientific principles can be applied in the generation of structures.
Industry proven techniques The common practice for when cooling is desired, is to make straight drilled channels which then may form complex structures if end caps and plugs are used.
A point of interest for future studies would be the implementation of Wick-like structures like the ones found in heat pipes featuring a high surface area to volume ratio, which can displace heat through the phase change of a fluid enabled by the capillarity of the structure.
Yang, "Hierarchically oriented crystalline structures of HDPE induced by strong second melt penetration," The Royal Society of Chemistry, 2014

The structure of the bimetallic nanoparticles is fcc-like with an average size of 5 nm.
Bimetallic NPs have been synthesized with a variety of structures, getting systems as bimetallic alloys, random alloyed nanoparticles and also core-shell structures [7].
Similar to bulk metals, two kinds of metal elements often provide an alloy structure.
In this work, Pt-Pd bimetallic NPs with alloy structure were synthesized by microwave-assisted process.
El-Sayed, Chemistry and properties of nanocrystals of different shapes, Chem.

The Ti strip was annealed and characterised in terms of microstructure and chemistry.
The small scale structure of the titanium seen within individual particles is similar to that shown in Figure 6.
The fine, equiaxed grain structure is evident in Figure 10 (b), the grain size ranges from approximately 6 to 25 µm. 500 mm (a) (b) Figure 10.

The crucible is maintained under a vacuum of better than 10-4 atmospheres during melting of the charge, allowing a series of chemistry adjustments to be made.
In order to obtain the required surface quality and the desired internal structure, the arc gap is typically maintained around 10 - 15 mm.
During hot working, the eutectic structure of the ingot product is gradually broken down to form a uniform distribution of fine boride particles within the austenite matrix.
An optimum thermo-mechanical treatment and forging reduction ensures an uniform and fine-grained structure.
This material is forged and hot rolled in a controlled temperature range to result in a fine-grained structure.

Atomic surface area also affects size, structure, and particle aggregation [3].
The second stage is strengthening the silica structure using the Ostwald ripening mechanism.
Simultaneously, 9% sulfuric acid was added to maintain the pH value while strengthening the structure of the precipitated silica aggregate.
Han, Nanomaterial Synthesis Insights from Machine Learning of Scientific Articles by Extracting, Structuring, and Visualizing Knowledge, J.
Scherer, Sol-Gel_Science_The_physics_and_chemistry_of_sol-gel_processing_-_Brinker_1990.pdf, (1990) 462. https://doi.org/10.1016/S0254-0584(02)00315-2

AMORPHOUS STRUCTURE OF POLY(PROPYLENE GLYCOL) ELECTROLYTES Glaura Goulart Silva a , Patterson Patrício de Souza a , Ana Júlia Silveira Mizherb and Marcos A.
INTRODUCTION During the last years the choice of host materials for the technological applications of polymer electrolytes has shifted from the semicrystalline poly(ethylene oxide) - PEO- to the amorphous multicomponent polyethers with fillers or plasticizers among others designed formulations and structures [1, 2].
It is important to note that the Raman spectra were recorded at room temperature which means that for all samples the structure which was probed is the amorphous with segmental flexibility.
Gray, in Polymer Electrolytes, Fundamentals and Technological Applications, The Royal Society of Chemistry, Cambridge, UK, 1997

Then modeling method and the structure of model are elaborated, and the advantages of the CA are applied to coal mining subsidence prediction model is analyzed.
It is not only an important model of computation theory, attracting large numbers of science from the field of computer to study its calculating ability, but also is widely used in the nonlinear phenomenon and the research of fractal structure in mathematics, physics, biology, chemistry, geography, economics and so on.
In this process, the coal mining subsidence produce different degrees of damage on the surface construction (structures) underground aquifers and so on. when the extent of the damage is Lesser , the surface building (structures) appear small cracks, etc.; when the extent of the damage is larger, the surface construction (structures) damaged heavily, and it may lost its original function or loss of groundwater resources which have significance of regional water supply, causing coal mining subsidence damage.
The complexity associated not only in structure, but also in content.
As is shown in Fig. 1, the entire model is structured in three parts: ①{TTP}9312 the input module that provides spatial input data and determines the model parameters, such as underground mining engineering, mining intensity, the stratigraphic structure of cap rocks in mining areas, the structure of cap rocks in mining area and tectonic stress field. ②{TTP}9313 the core part— the unit cell model, including the adjustment of model parameters, the identification of the seed point and the analysis of controlling factors. ③{TTP}9314 the result output module that provides dynamic information about mining subsidence of any time.

It is possible to control their pore structure by selecting appropriate activation conditions depending on the final application of the MACs .
KOH has been used to fine-tune the porous structure of MACs and make MACs with high SSAs and appreciable portions of mesopores [19,20].
This work described here focused on the study of the influence of the activation conditions on the pore structure of mesoporous activated carbons(MACs). 2.
It is possible to control their pore structure by choosing appropriate activation conditions depending on the final application of the MACs .
Hyeon, Journal of Materials Chemistry, vol. 14(2004)p. 478-486, doi: 10.1039/b311541k

This decline is principally a result of difficulty of room temperature deformation, due to the hexagonal crystal structure of the material.
A major problem encountered in wrought components is the strong directionality of properties, which is caused by the particular deformation characteristics of the hexagonal crystal structure [12].
The basal plane alignment in the longitude direction raises the stress needed to move dislocations on the primary slip planes and favours twinning only in compression as hcp structure [17].
The hcp structure of magnesium severely limits its available slip systems and preferred orientations can develop during rolling and extruding, slip occurring predominantly on the basal planes which leads to their alignment parallel to the direction of metal flow.
Huang: Materials Chemistry and Physics Vol. 81 (2003), p. 11