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The multiple development of mechanical structure relys on the evolvement of and the variation of machine parts.
The common structure includes reciprocation compressor, piston-type pumps and combustion engine mechanism and so on.
The paper summarized the evolutive laws of some volumetric fluid machineries, and classified the variation evolution context of their main structures to provide a reference to the structure innovation.
Jónsson, in: Theoretical Methods in Condencsed Phase Chemistry, edited by S.D.
Schwartz, volume 5 of Progress in Theoretical Chemistry and Physics, chapter, 10, Kluwer Academic Publishers (2000)

Ben-Nissan1e 1 Department Chemistry, Materials and Forensic Science, University of Technology Sydney, PO Box 123 Broadway NSW 2007 Australia 2 Department of Chemistry Kasetsart University, PO Box 1011 Kasetsart Chatujak Bangkok 10903 Thailand a Kanthi.C.Lewis@its.edu.au b g4784020@ku.ac.th c Louise.Evans@uts.edu.au d fscits@ku.ac.th eBesim.Ben-Nissan@uts.edu.au Keywords: hydroxyapatite, crocodile, biomaterial, bone, bonegraft, bioceramic Abstract This study aims to characterize the structure and properties of crocodile bone to assess the potential for use in biomedical applications.
Maintenance of a structure that enables fast movement on land and locomotion in water is required[1].
The pore structure appeared random rather than uniform, as pores of varying sizes were present in the same portion of bone.
In carbonated apatites, the carbonate is liberated from the Hap structure between 500-900 degrees producing H2O, CO2 [8].
In order to retain elastic properties in the material, the use of a less crystalline structure can allow bone to be produced which is less brittle.

The Journal of Physical Chemistry C. 2010, 114(11): 5073-5079
The Journal of Physical Chemistry Letters. 2010, 1(17): 2607-2612
Band edge electronic structure of BiVO4: elucidating the role of the Bi s and V d orbitals[J].
The Journal of Physical Chemistry C. 2013, 117(46): 24479-24484
The Journal of Physical Chemistry C. 2011, 115(16): 8064-8071

SbVO4-TiO2 Cation Deficient Photocatalyst: Synthesis and Photocatalytic Investigation Rahmatollah Rahimia*, Masoumeh Mahjoub Moghaddasb, Solmaz Zargaric Department of Inorganic Chemistry, Faculty of Chemistry, Iran University of Science and Technology, Tehran, Iran a rahimi_rah@iust.ac.ir, bmaral_mahjoum@yahoo.com, cszargari@iust.ac.ir, Keywords: Antimony vanadium oxide, Photocatalyst, Photodegradation, Organic pollutant Abstract.
Antimony vanadium oxides with a rutile type structure are well-known as important materials due to the peculiarities of their physical and chemical properties.
However, a little importance is usually given to the structure flexibility exhibited by the SbVO4 phase which has rutile type structure.
This structure can accommodate up to high cation vacancies [5].
It was determined that by introducing a vacancy in the SbVO4 rutile type structure, the oxygen atoms surrounding it was underbonded.

The crystal structure of the complex of nicotinic acid and Sb(III) belongs to triclinic system and that of nicotinic acid and Bi(III) belongs to monoclinic system.
To study the complex formation between the antimony or bismuth ion and nicotinic acid will be interesting not only for the bioinorganic chemistry, but also for the main elements chemistry.
The crystal structure of antimony trichloride belongs to orthorhombic system (JCPDS 1-248) and that of nicotinic acid belongs to monoclinic system (JCPDS 30-1845).
The crystal structure of the resultant belongs to neither monoclinic nor orthorhombic system.
Earnshaw: Chemistry of the Elements (Pergamon Press, Oxford 1984)

Research of Chemical Film Process on Metal Surface Chen Ze-min1, Lu Pin2, Du Yu1 and Lu Ya-ping1 1School of Chemistry and Material Science, Langfang Teachers College, China 2Department of Chemistry and Environmental Science, Hebei University, China Email:lupin421@163.com Keywords: Metal surface; Chemical film; Technology Abstract: In the article we selected polyethylene glycol(400), triethanolamine, silane coupling agent, chrome alum, glycerin as the main raw material, and systematic studied the chemical adsorption film technology on metal surface by using one step.
The chemical adsorption film accumulation was closely, and it had stable structure.
After 20 years of development, the chemical adsorption film was one of the hot investigation areas in chemistry and physics, biology, engineering, interface and materials disciplines cross-cutting areas.

The evolution of the crystalline structure (i.e., from poly to single) and of the surface roughness can be understood by simply comparing two characteristic times, like those inherent the surface diffusion and the matter supply to the surface.
Because the very high temperatures involved, ranging from the about 1600°C of the epitaxial process to the about 2300°C of the bulk growth one, the system chemistry approaches that of the thermodynamic equilibrium and the deposition processes are operated under mass transport control.
The deposition chemistry involved in processes using chlorinated species is rather complex.
(a) Idealized sketch of the SiC growth chemistry in presence of chlorinated species [6-8].

The electrical conductivity of RP structure depends on the n value.
This structure tends to be more symmetry with the amount of Sr.
Greenblatt, Synthesis, Structure, and Properties of Ln4Ni3O10-δ (Ln = La, Pr, and Nd), J.
Manthiram, Comparison of the crystal chemistry and electrical properties of La2-xAxNiO4 (A = Ca, Sr, and Ba), Mater. 
Darr, A combinatorial nanoprecursor route for direct solid state chemistry: Discovery and electronic properties of new iron-doped lanthanum nickelates up to La4Ni2FeO10–δ, Solid State Ionics 225 (2012) 176-181

Results show that the sulphide surface layer of the duplex layer is mainly composed of close-packed hexagonal structured FeS phase and cubic structured FeS2 phase.
Phase structure was examined with a D8ADVANCE X-ray diffractometer (XRD).
Results and Discussion Morphologies and Structure.
[4] The ration mensuration of the phase composition of ion nitride layer (Railroad Science Academe Metal and Chemistry Graduate School, Beijing 1977)
YANG: Study on the technics of impulse plasma chemical vapor deposition (Railroad Science Academe Metal and Chemistry Graduate School, Beijing 1995)

The Internal Combustion Engine Power Plant and Flywheel Battery were the two primarily compositive units of the Internal Combustion Engine Power Plant --Rotary UPS, among them the Internal Combustion Engine Power Plant ensured the continuous power supply to the load after the breaking of the mains supply, the Flywheel Battery ensured the uninterruptible continuous power supply to the load when mains supply switched to the Internal Combustion Engine Power Plant, so the paper started with the two units, Introduced the control system structure and principle, and focused on discussing the method of achieving the Internal Combustion Engine Power Plant --Rotary UPS telecommunication by Ethernet.
At present, UPS used chemistry batteries as the energy storage device basically, but because the measure of the stored energy was difficult ,which induced the inconvenience of the remote control and monitoring, so in the system chose flywheel battery chemistry energy storage way to achieve the uninterruptible continuous power supply between the Internal Combustion Engine Power Plant and mains power, the energy of the flywheel battery could be determined by the measurement of the position(speed)[1][2],so facilitated the monitoring.