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It not only affects the water quality, but also cause water waste.
In the process of water supply and drainage design, sanitary wares and water distribution equipment will also affect water savings.
Solar energy as an inexhaustible new cleaning energy, it is more used in the hot water supply system.By using the direct heating equipment of solar energy, include vacuum tube and heat tube, the heat collecting efficiency is high, and has good insulation properties, little affected by environment, fully automatic operation, simple operation, convenient maintenance, can be used throughout the year.In the design of solar water heating system, we should pay attention to the following several aspects: collector to choose according to actual condition, considering the antifreeze performance, thermal shock resistance and bearing capacity and other factors; cold regions should adopt reliable way of antifreeze; take the auxiliary heating when necessary.
References: [1] Songcai Chen: Building water supply and drainage (Mechanical Industry Press, Beijing 2011)

The quality of the welded joints is affected by different environmental conditions.
Different environmental conditions such as temperature, humidity, wind speed and dust have a great impact on the welding porosity, the softening of welded joint, the welding residual stress and mechanical properties of the welding.
The float range of surface hardness became larger with increased corrosion time, regardless of the weld zone, heat affected zone or the base metal.
Corrosion after 14 days under ambient humidity conditions, tensile specimens were spited in the heat-affected zone.
Atmospheric corrosion and its influencing factors of aluminum and aluminum alloys [J].Corrosion & protection, 2009, 30 (6):359-365, in Chinese

Corneal damage can be caused by various factors, namely diseases and injuries that cause visual disturbances to blindness.
This means that sample A and sample B have strong antibacterial properties.
Antibacterial properties in samples A and B were obtained from chitosan.
All ingredients are good with HPM or do not show excellent antibacterial properties.
Yoo, “Pluronic/chitosan hydrogels containing epidermal growth factor with wound-adhesive and photo-crosslinkable properties,” Journal of Biomedical Materials Research, Part A, vol. 95, no. 2, pp. 564–573, 2010

A Subsurface Fatigue Crack Generation Model in Near Alpha Titanium at Low Temperature Osamu Umezawa1,a* and Weibo Li2,b 1Faculty of Engineering, Yokohama National University, Yokohama, 240-8501, Japan 2Graduate School of Engineering, Yokohama National University, Yokohama, 240-8501, Japan aumezawa@ynu.ac.jp, bli-weibo-wv@ynu.jp Keywords: High-cycle fatigue, Microcrack, Strain incompatibility, Taylor factor, Critical resolved shear stress, Titanium, Microtexture.
That is why not only the microstructure but also texture strongly affect the subsurface fatigue crack initiation.
The microcrack on basal plane required a combination of a high Schmid factor in addition to high elastic stiffness, including a high tensile stress normal to the basal plane.[7] The shear stress on {1010} assists the microcrack growth to form a (0001) facet and coalescence of facets on (0001) and {1010} by slip-off.
Then an approximated equation to give the maximum stress intensity factor range, ΔKImax, at the crack tip is represented as follows: ΔKImax=A∙Δσmaxπarea. (1) where Dsmax is maximum cyclic stress range, A is 0.5 as the coefficient of subsurface crack, and area is the square root of subsurface crack area as the microcrack length.
Nagai, Critical experiments and analyses at cryogenice temperature to promote a bettwer understanding of mechanical properties in high-strength alloys, in: U.

The system properties involve only the operating procedure of machinery processing, not concerning the cutting parameters of machine tools.
The problem can be resolved by mapping properly and sharing the maps and materials without affecting the visual effects during simulation.
Because the work is in motion, a Moving obstacle property is added on it.
Seven bounding volumes which cover the body, the arms, the left hand, the right hand index finger and thumb, other three fingers on right hand are created to describe the virtual worker and the Moving obstacle properties are also added.
Exploration of human factors experiment based on driving simulation.

The green sand mold with good mold properties are useful to obtain the sound cast iron castings.
They are tried to simulate the dynamic behavior during molding and to predict the mold properties after squeeze molding.
On the other hand, the green sand mold with good mold properties are useful to obtain the sound cast iron castings.
The literature [1] showed the pressure on squeeze plate, the pressure on the side wall, the dynamic compacting behavior of green sand and the void fraction (bulk density) for mold properties.
Nomura: “Squeeze Molding Simulation Using The Distinct Element Method Considering Green Sand Properties”, J.

The properties of product design and market competition environment determine the significance of design reuse.
Although the present CAD platforms have studied and developed corresponding standard parts library, they didn’t support the whole process in mechanical product design (e.g. demand analysis, concept design and detailed design).
The case we choose (Fig.2) shows that the material is ABS which possesses strong mechanical strength, good fluidity and easy molding.
(Shrinkage is the main factor of affecting the product size precision, the main parameter of confirming die size in the mold design) 2) Set mold coordinate system.
In: Chinese Mechanical Engineering. (2006) [7]R.S.

Introduction Friction welding machine is one kind of machine tool that utilizing the heat generated by relative rotational motion of weldment face to make the end portion reaches the thermoplastic state ,then quickly upsetting and complete welding.The static stiffness and optimization analysis has conducted in this paper for the special Pre-baked anode(square aluminum guide rod and flat steel beams welded)Friction welding machine in Aluminum electrolytic industry .Comparing with the general friction welder ,it can do weld of large size, the large friction torque between welding, high precision and so on.The Internal structure, layout, and location of ribs in spindle box of welding machine can affect the static and dynamic performance of the structure in box largely[1].Currently domestic get the static and dynamic properties of box structure through finite element method and software analysis.Some scholars have already done the analysis of headstock performance,but all these analysis are
The stress and strain parameters will be obtained through the static analysis of spindle box.At the time of the biggest force bear by cabinet( 5000kN upset force),the maximum deformation amount is less than 0.64mm.Because of the upsetting force is mainly applied to the front casement of spindle and the deformation is mainly concentrated in this,the maximum stress 248.22MPa is due to the phenomenon of stress concentration caused by exist of the cusp at the connection .Most of the stress in the front panel of the spindle box is around 27.58~110.32Hz and stress of oblique ribs is around 82.74~165.48Hz.The stress concentration is due to elastic theory caused by the geometrical configuration and load stress value,which will not affect the analysis of the structure[6].Because of the yield strength of 16Mn 350MPa,the safety factor of cabinet:, considering the worst working conditions ,then the static stiffness of the spindle box can meet their conditions.So choose the lightweight design.Figure
Mechanical Design and Manufacturing, Vol. 3(2011),p. 218.
Beijing: Mechanical Industry Press,1990, p. 10-50
Finite element analysis of four seats pure electric patrol car trailers [J].Mechanical Design, Vol. 12(2011) p. 54.

Despite the comparatively early discovery of the age hardening effect in this alloy system, relatively little work has been published on mechanical properties of the alloys, in general, and its fatigue characteristics [2-5].
The 3-mm-diameter, 100-mm-thick disk was prepared for TEM observation by mechanical polishing with a digitally enhanced precision specimen grinder and dimpling by a dimple grinder.
Although the specimens had shallow circumferential notches (20-mm notch radius and 0.25-mm notch depth), the fatigue strength reduction factor for this geometry was close to 1, meaning that they could be considered plain.
The fatigue specimens were electrolytically polished (approximately ≈ 25 mm from the surface layer) prior to mechanical testing to remove any preparation-affected surface layer.
Excepting the crack length less than 0.25 mm in which crack growth is likely to be affected by the stress concentration due to a small hole, a linear relation (a red line) held between lnl and N.

Fig. 1 World Portland cement production [3] Utilization of water can influence the properties of fresh and hardened concrete based on the w/c as a basic factor in mix design of mortar and concrete [13], [14].
In order to produce perfect concrete with good workability, mechanical and durability properties, w/c have to be considered carefully.
Nikbin, “A comprehensive study on the effect of water to cement ratio on the mechanical and radiation shielding properties of heavyweight concrete,” Constr.
Ali, “Combined influence of glass powder and granular steel slag on fresh and mechanical properties of self-compacting concrete,” Constr.
Ozbakkaloglu, “Mechanical and durability properties of high-strength concrete containing steel and polypropylene fibers,” Constr.