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Depending on the physical and chemical characteristics of the ballast water treatment technology can be divided into three categories: mechanical treatment, chemical treatment and physical treatment.
Mechanical treatment.Mechanical treatment typically includes filtration and centrifugation techniques, the ballast water through the filter / sieve or "centrifugal separator" filters out impurities and harmful microorganisms, solid-liquid separation.
The disadvantage is that chemical health and safety of the crew, could adversely affect the pump and piping systems and ballast tanks.
The disadvantage is that some microorganisms are not affected by this approach, the need for additional work piping.
Conclusions The selection and installation of ballast water treatment system is a very complex project, restrictby the characteristics of the ship, processing technology and system capacity, and many other factors.

Among the various surface techniques, electroless Ni-P plating is of special interest due to its good properties and convenience.
The two kind of time and deposited time were used as three factors of the orthogonal test, and each factor include three levels, the orthogonal test was carried out.
Table 2 shows details of the factors and levels.
Table 2 Factors and levels of the orthogonal test Levels Factors pickling time (A) (s) activated time (B) ( min ) deposite time(C) ( h ) 1 30 2 1.0 2 40 6 1.5 3 50 10 2.0 Firstly, the substrate specimens were treated for 10 minutes in the degreasing fluid with temperature of 70-80 Celsius degree.
K1, K2 and K3 means average value of evaluation result of corresponding level of every factor.

The laser nitrided surfaces are coated with TiN using the PVD facility to enhance the tribological properties.
INTRODUCTION Titanium nitrides provide the hard surfaces and improve the tribological properties of the surface.
They showed that temperature and the time is the main factors for the formation of the new phases during the nitriding process.
In addition, all the properties are assumed to be uniform and independent of the temperatures in the analysis.
Aleem, Laser gas assisted nitriding and tin coating of Ti-6Al-4V alloy: Experimental and numerical investigation of mechanical properties, Journal of Materials Processing Technology, Vol. 209(3) (2009) 1199-1208.

There are many parts in aerospace fixing device, the 7075 - t351 brand aluminum alloy is a commonly used material of these parts[2].The material has high strength, good toughness, wear resistance and resistance to spalling corrosion resistance and other characteristics; After the machining deformation, comprehensive mechanical processing performance is good[1].
Figure 1 Part drawing Figure 2 Parts attributes figure Figure 3 Blank properties Figure 4 Layout The reason analysis.
Can be seen from the above analysis, the blank size in addition to the component itself size cannot be changed, cutter diameter and lugs is also one of the factors that affect the blank size.
Mechanical engineering press, 2012.

The physical properties of CoCrMo foam was analyzed by porosity and bulk density test that was Archimedes principles.
To achieve metal foam with an acceptable open-cell structure, the properties of the slurry, especially rheological properties are highly important and require precise control.
The particle size and shape of the raw powder, the type and content of the binder, the ratio of solid and liquid content are among of the factors that affect the rheological properties of the slurry [9].
For the upcoming research the mechanical properties of CoCrMo foams will be analyse in the study.
Wattanapornphan, Rheological properties of commercially pure titanium slurry for metallic foam production using replica impregnation method, Powder Technol. 266 (2014) 129–134

In the following, the high temperature properties are studied systematically [26, 27].
Although langasite family resonators can be excited piezoelectrically up to temperatures close to their melting point, some factors limit their practical use at high temperatures.
In this case the Qf reflects the materials properties for a given crystal.
Sitar, The growth and optical properties of large, high-quality AlN single crystals, J.
Fukuda, High temperature properties of langasite, Mater.

Changes in the material structure during fatigue are reflected in its mechanical properties.
The solution to the above-listed issues will help model and obtain new classes of materials and alloys with improved cyclic mechanical and radiation properties.
Thin foils were prepared from them by mechanical and electrochemical thinning.
Naturally, the change in the substructure affects the process of microcrack propagation.
It is also necessary to consider the acting stresses and the range of the Schmid factor.

The main challenge in sintering Inconel 718 is to avoid the formation of a prior particle boundary (PPB) network that is deleterious to the mechanical properties.
This improves by far the homogeneity of the properties and often provides an increase in the final properties, when compared to wrought or casted products.
On the other hand, the uniaxial pressure applied is also enhancing the sintering by affecting diffusion and by plastic/viscous flow.
It is believed that these two factors are effective but in addition, the presence of a liquid film at the particle interfaces adds another contribution to the sintering of alloy 718 by SPS.

The results could provides the test data and theoretical basis for the mechanism of the processing performance affected by the dynamic behavior of machine tools.
In the machining process, there are many factors (the status, pose and cutting parameters of the tool, workpiece materials etc.) to affect the magnitude and direction of the cutting force.
In the case of cutting force no mutations (in the change of normal range), along with the extension of time, cutting tool wear and other factors, solve the reliability of the model.
This provides the test data and theoretical basis for the mechanism of the processing performance affected by the dynamic behavior of machine tools
Chinese Mechanical Engineering, 2008, 9(16):1908-1911

INTRODUCTION The physical properties of polymers may be affected by doping, the certain structural, optical, mechanical, electrical and magnetic properties of the selected polymer can be controllably modified owing to the type of the doping, concentration, and the way in which it penetrates and interacts with the chains of the polymer.
Deshmukh, "Optical properties of polyaniline doped PVC-PMMA thin films", Indian J. of Pure and Appl.
Foulger, "Optical properties of perfluorocyclobutyl polymers", J.
Jain, "Dielectric properties of solution-grown-undoped and acrylic-acid-doped ethyl cellulose", Bull.
Osuji, "Growth and optical properties of Ag2S thin films deposited by chemical bath deposition technique", J.