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Introduction Energy saving and emission reduction is an important measure for thoroughly applying the scientific outlook on development and building a harmonious socialist society, energy shortage has already become a severe problem around the world, therefore, many countries have been energetically engaging in the research, development, promotion and popularization of energy-efficient appliances.
According to the meteorological data, it can be known that the temperature of tap-water in winter is t1=10℃, while in summer it is t1=28℃, and t2=50℃, thus it can be calculated as follows: In winter: =17.3℃; In summer: = 12.28℃.

Other study showed a continuous reduction of specific energy with increasing rake angle for maize stalks which indicated that a value of at least 30° was required with an optimum at approximately 50°.
Data were analyzed statistically using ANOVA and the least significant difference LSD calculated at 1% to estimate the differences between the averages.

This is accompanied by decrease the friction force many times that recorded the acoustic method for a proportional reduction of the integral index of friction D.
More importantly the binding energy of N1S level in a sample with a bilayer nanocoating is higher by 2 eV (on XPS-data).

Great amount of data show that building energy consumption in such passive residence can be further reduced through a series of technologies.
The actual measurement indicates that the ecological apartment can save 75.8% of energy; and in the heating season, 50GJ of thermal energy is converted from the solar energy; with the apartment heat consumption index of 9.23, and coal consumption index of 4.50, the CO2 emission reduction is approximately 180 tons per year[2].

The low granulometry of powder allows a better control of the thermal gradient during the contact between the material and the laser, providing the following advantages: - an excellent material quality and surface status; - limited mechanical stress within the part being produced; - increased definition of the details; - reduction in size of production supports.
This process allows for highly complex geometries to be created directly from the 3D CAD data, fully automatically, in hours and without any tooling.

The American Society for Testing and Materials (ASTM) define Additive Manufacturing (AM) as the “process of joining materials to make objects from 3D model data, usually layer-upon-layer, as opposed to subtractive manufacturing” (ASTM F2792-10, 2010) without the need of conventional process planning as used on machining or conformation processes.
Conclusions The main advantage of the use of design methodology techniques is the reduction of the time of the design development; besides, there is a contribution to the design quality.

The survey data shows that the oil and gas pipeline is the main corrosion of the electrochemical corrosion pit on corrosion; In 767 cases of corrosion failure accident statistics results show that the local corrosion of metals account for about 80%, the pitting corrosion, stress corrosion and corrosion fatigue occupy prominent position [1].
It was pointed out that the tensile strength decreases gradually and the total elongation decreases drastically with the increase of the thickness loss due to pitting corrosion.The reduction of the tensile strength of the members with pitting corrosion is larger than that of members with uniform thickness loss in terms of average thickness loss.

Table 1 – Effect of cathode current density on the characteristics of the electrodeposition process and the quality of Zn-Co alloy coatings Current density, А/dm2 Cobalt content, % Current output, % Throwing power, % Appearance of coatings 0.5 9.5 97 53 dark gray, matt 0.75 - 95 60 dark gray, matt 1.0 9.1 93 68 gray, matt 1.5 8.8 91 70 Light gray, smooth 2.0 7.6 90 71 Light, semi-gloss 2.5 6.5 89 72 Light, semi-gloss, "tan" on the edges 3.0 5.3 85 75 Light, rough The throwing power of the electrolyte increases with increasing current density, which is in full agreement with the data on the cathode current output of the alloy which gradually decreases with increasing current density.
The decrease in cobalt current output is due to the fact that the rate of reduction of hydrogen ions increases.

Introduction Stabilized expansive soils is widely used in subgrade in expansive soil area, the shear strength of the stabilized expansive soils always affected by cyclic wetting and drying which caused by rain or the water level variations of the lake or river, the strength reduction will severely affected the safety of the slope.
Table 1 Shear strength after different tomes cycle Number of cycles 0 1 3 5 7 9 （deg） 30 24 21 18 17 17 C （kPa） 95 56 41 37 36 35 In order to facilitate data analysis and processing, adjusted test results of 0 times cycle to 0.01 times, and drawn the sketch of , C and cycle times based on the test results in figure 2.

Pervoskite-like compound oxides are outstanding (redox) oxidation-reduction catalysts, in a recent publication compound oxides ABO3 (A=Ln,rare metals, B=Mn, Cr ,Fe, Ni, transition metals) A-site ions constitute the changes of B-site ions' redox capability and the effect of catalysis activities[1-3].
The XRD data collected are shown in Fig. 1.