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Abstract: This paper analyzes that the climate characteristics in hot summer and cold winter zone make residents form a habit of using the energy intermittently, which reflects a good energy saving property and should be maintained.
However, the effect of natural ventilation is also greatly affected by the outdoor environment: outdoor temperature, temperature difference and outdoor wind speed.
Meanwhile, residential building’s requirement for ventilation in hot summer and cold winter area mainly focuses on two parts: on one hand it mainly focuses on nighttime cooling in summer and daytime cooling in transition season; on the other hand the indoor air must be kept fresh, ventilated effect permanent without being affected by factors such as weather, noise, privacy, etc.
In view of the above, ventilation pattern in hot summer and cold winter zone must be a mixed one, combining natural ventilation and mechanical ventilation[5].
Conclusions (1) The climate characteristics in hot summer and cold winter zone of China make residents forming the habit of using the energy intermittently that reflects a good energy saving property and should be maintained

The political situation affected significantly to build new warships and marine facilities and the modernization of existing by the need to protect the crew in front of the fire with a machine gun or the effects of shock loads from underwater explosions.
Currently in CAE [3, 4, 5, 6, 7], mainly for the steel and aluminum alloys adopted certain standards description of material properties.
In conclusion, the coefficients for the analyzed steel for Johnson-Cook’s constitutive model take the values: A = 700 MPa q0 = 293,15 K B = 640 MPa qtop = 1733÷1793 K C = 0,024 n = 0,6 m – 0.75÷1,0 Other properties of this steel is assumed for the calculation: · density - r = 7850 kg/m3; · Young’s moduls - E = 2,09×105 MPa; · Poisson’s ratio - n = 0,3; · yield strength - Re = 700 MPa; · ultimate strength - Rm = 853 MPa.
The experimental results enabled the verifications performed computer simulations, in which besides the characteristics of the material, the effect on the results obtained has a number of other factors such as failure criterion of the material and its parameters, the implementation of contact, discretization and description of the elements, the choice of the time step integration of equations of motion and a lot of factors.
In the tasks from the scope of the material model design into impulse resistance is just one of the many important elements affecting the results obtained.

Introduction Polyurethane (PU) resins, due to their high performance, especially in abrasion resistance, chemical resistance and mechanical flexibility, are widely used in different areas such as coatings and adhesives for wood, textiles and automobiles[1,2].
PUA is a kind of excellent polymer materials, especially for coating and adhesive, due to their superior properties such as decorativity, protectiveness, and corrosion resistance.
PBA were charged into a dry vessel fitted with a reflux condenser and a mechanical stirrer.
Therefore the added amount of DMPA will affect the length of PU chain, and also determine the content of the ionic group.
Summary The viscosity of high solid content emulsions is sensitive to many factors.

Ultrasonic flow meters are affected by the temperature, density and viscosity of the flowing medium.
They are inexpensive to use and maintain because they do not use moving parts, unlike mechanical flow meters.
The calculation of the flow can use the factor correction function of the hardware multiplier in the TDC-GP1 chip.
By setting different multiplication factor can make the meter adapt liquid flow calculation of different tube diameters.
Mariano, “Toward understanding the fundamental mechanisms and properties of the thermal mass flow controller, ”Vac.

There are many steps to build the finite element model, such as draw the model, determine material properties, mesh generation and so on.
By current chopping control, the large peak value of current and flux linkage can be avoided and constant torque mechanical characteristics can be obtained.
The reason is higher speed can provide bigger input mechanical power, and the phase conduction period will be shorten.
It can be found that the change of capacitor will not affect the amplitude of the voltage, but with bigger capacitor, the rise time of bus voltage will be longger and the voltage ripple will be smaller.
In generating mode, the effects of several factors on bus voltage are simulated and the reasons are given as well.

Introduction As observed in many experiments, failures of metallic materials are very sensitive to the structure and properties of the surface, and in many cases they initiate from the material’s surface.
In order to eliminate the effects of surface roughness induced by the shot peening process, a 5 µm thick layer was removed from the surface by mechanical polishing, thus the measurement was actually initiated at about 5 µm from the surface.
The surface material was removed by controlled mechanical polishing, bringing a small force on the sample, using ultrafine abrasive paper and repeatedly moving with water cooling.
The change of defect configuration in the transition layer should be affected not only by treatment time but also by some immeasurable factors accompanying the energy dissipation process, for example, spontaneous temperature increase induced by the severe deformation process.

Introduction Gas turbines are required to operate under conditions of high temperature and mechanical loading.
Due to the frequent start-stop or the great load variation, the gas turbine rotor often bears the drastic changing of temperature and tremendous thermal stresses, plastic deformation will be occurred in local area, which leads to low-cycle fatigue damage, it will affect the safe operation of gas turbine[2-4].
The concentration of stress has enormous influence on fatigue strength, and it plays a leading role in all sorts of factors.It greatly reduces the component's fatigue strength [5,6].
Using a physics-based model, mechanical and thermal stress analyses are performed on the rotor.
The Theory of Rotor Fatigue Damage Fatigue properties of the rotor steel Rod is the key component of the rotor; the combined rotor is linked with the discs by different type rod as a whole.

Introduction Polylactide (PLA) is one of the most promising biodegradable polymers owing to its mechanical property profile, thermoplastic processibility and biological properties, such as biocompatibility and biodegradability.
Different critical properties should be met for various applications.
Enhancement of the cell attachment on the scaffold materials will benefit tissue engineering applications, and thus if independent control of the surface morphology, porosity, mechanical properties and bioactivity of PLA can be achieved, and optimization of PLA material properties for specific applications becomes feasible.
There maybe exist two factors, the viscosity of solutions and the volatility of solvent, accounting for this phenomenon. 1,4-dioxane volatilizes slowly while acetone is highly volatile ,When the 1,4-dioxane content is high, it will reduce the volatility of mixture and volatilize slowly during the spinning process.
The SEM micrographs at different voltages (A) 15 kV, (B) 18 kV, (C) 21 kV, (D) 24 kV 3.4 Effect of collecting distance The structure and morphology of electrospun fibers is easily affected by the capillary-screen distance, which could cause variation of the deposition time, evaporation rate, and electric field intensity.

Its use as pigment in paints [6] is a common practice due to the increase in UV resistance, resistance to corrosion and mechanical property of abrasion of the coatings.
These properties depend on several factors, such as crystallinity, morphology and specific surface area of the material.
ZnO nanostructures have also been used to improve the properties of sensors, solar cells, varistors, among other [6-12].
The powder synthesis route exerts great influence on the properties of the final product.
The drying and heating routes also affect the characteristics of the material.

The study provided a new insight into the contribution of heat input rate in the production of unwanted weld microstructural features and assisted in the design of methods and techniques for tailoring weld microstructures with optimum properties.
The weld section microstructure is influenced by the heating and cooling conditions during welding in terms of the weld heat input per unit length and the energy transfer factors which are governed by the welding current, welding speed, the degree of dilution and the materials property.
For instance, Reddy and Meshram [4], reported that grain size reduction in weld section of structural steels confer the advantage of increased resistance to solidification cracking and improved mechanical property.
Norul Haq: Effect of friction welding parameters on mechanical and metallurgical properties of ferritic stainless steel, Int.
Kaltenhauser: Improving the engineering properties of ferritic stainless steel, Metal Engineering Quarterly, Vol. 11, No.2 (1971), 41-47