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(3) Influences of water content.Water is generally held to be conductive and able to eliminate electricity because on the surface of solid-state medium, a layer of conductive water film is adsorbed to improve the conductivity of solid-state media.
But there is no water film formed for petroleum.
In addition, the relative motion between oil and water will produce static electricity.
The water content of 1% to 5% mixed in the oil is most hazardous
Therefore it should be highly valued by professional of fuels of troop.

The environmental protection target of Beijing-Shanghai high-speed railway construction is that water function and cultivated land resources get effective protection; Earth and rock engineering’s soil and water loss get effective control; Noise and vibration’s environmental impact get effective control; High-speed railway facilities, buildings and urban environment and natural landscape along the railway could be compatible.
April—may in 2006, designing unit and evaluation unit completed the soil and water conservation scheme and environmental impact assessment report, and passed through the review of Ministry of Water Resources and  State Environmental Protection Administration, and provided basis for engineering scheme design and construction management of construction period.
For the crossing ecological sensitive area’s railway, constructed bridge and tunnel reduced the ecological impact as far as possible, took the effectively water environment protection measures in construction period and reduces the influence on surface water; Noise barrier measure was implementted basically on environmental assessment and written reply.and added multiple noise barrier according to physical truth and local government requirements; Most of sensitive point house was removed in 30 meters; The finished parts was planted and recoved in time.
The level of management has improved if professional level of the environmental management personnel should be improved.
Conclusions In the Beijing-Shanghai high-speed railway construction, according to the construction target and requirement of world first-class high-speed railway, the railway construction earnestly followed out environment protection and water protection idea, strictly implemented“three simultaneousness” working system.

With the development of computer technology, the computational fluid dynamics software functions have been greatly enhanced, in recent years, some researchers have been presented based on propeller open water performance of CFD numerical analysis method, and compare the calculated results with the traditional experimental data, prove in the propeller open water performance calculation, using CFD software to the results of numerical simulation can meet the requirements of engineering application [2].
The definition of the boundary conditions will directly affect the accuracy of experimental results and authenticity, this experiment using professional software Gambit of boundary conditions and medium types are defined.
Fluid is defined as incompressible constant temperature water, at the same time neglect wake effect.
At the same time, propeller cut the water flow continuously from the leading edge and launch from the flowing edge, lead to the suction surface to form a wide range of low pressure area.
References [1] Fudong Gao, Cunyun Pan, Wenshan Cai: Based on propeller open water performance of CFD numerical analysis and verification.

It is related closely with the type of soil, soil water content, and heat and moisture transfer, so it is almost impossible to establish the Numerical calculation model that Reflect the actual working condition, to exact solution based on the calculation of existing technology[4].
The initial and boundary conditions are for ，； for and，； for and，； for and ，； for and ， for and ，； for and，； 2.3 The parameters for calculation Table 1 Technical features of the calculation Year-round weather information Average temperature （℃） 20.7 Highest temperature （℃） 38.9 Lowest temperature （℃） -10 Average relative humidity （%） 45 Soil physical parameters average temperature in the soil in underground 1m（℃） 22.4 Soil coefficient of thermal conductivity（w/mk） 1.3 Soil density（kg/m3） 1695 Underground heat exchanger parameters Buried tube type horizontal Pipe materials px-b Buried tube chief（m） 50 Pipe diameter（m） 0.016 distance of two tube （m） 0.3 Thecalculation results and analysis Fig2 Changes of Ground temperature Fig3Changes of Ground temperature （Mass Flow as 0.041 kg/s） （Mass Flow as 0.018 kg/s） In the numerical calculation, the average temperature of water–anti-freeze solution is12.4
Acknowledgements: This work was financially supported by the Fluid machinery and engineering provincial key subjects (507907), Thermal energy and power engineering characteristics professional(508057) , The school Key subject (509927);Natural Science Foundation of He Nan Province Department of Education（2010B460011）,He Nan Province Key Research Project(112102210105) .

Introduction The oil depot is a professional warehouse of storing, transferring and supplying oil and petroleum products, a bond of coordinating processing and production of crude oil, oil transportation and supply, and base of the state and military for oil storage and supply.
We could cool the temperature by the irrigating water spray, choose tank coating correctly and reduce the temperature difference by taking measures of insulation to the oil tank.
If the oily sewage of the oil depot is poured into the surrounding rivers and ponds directly, of which the oil molecules will float on the water surface forming a large area of the film to destroy the function of self-purification of water bodies which will result in smelly black water, the death of microorganisms and animals because of hypocrisy, but also affect the life of the residents and production units of oil depot and its surrounding and the quality of production water.
Usually, the water quality treated by treatment facilities could achieve the standards generally.
l Whether there is the sound like running water in the tube usually.

The integration of such systems usually requires the advice of professional civil engineers, architects and PV system designers during the design of the system and the building.
Experimental section The conductive glass FTO (surface resistance of 30Ω / □, a thickness of 2.2 mm) was ultrasonic cleaned with a mixture of common washing detergent and household cleaning surfactant for 20 minutes, then rinsed with plenty of water.
Then, FTO sheets were ultrasonic cleaned in acetone for 10 minutes to remove the possibly contained hydrocarbons; and then ultrasonic cleaned the sheets with high purity water twice, each for 10 minutes.
After these efforts, FTO sheets were immersed in high purity water for follow-up experiment as the substrate of DSSC.
TiCl4 (TiCl4 99% A.R, Nanjing Chemical Reagent Co., Ltd.) was diluted with water to 2 M at 0 °C to make a stock solution, which was kept in a freezer and freshly diluted to 50 mM with high purity water at each TiCl4 treatment.

Experimental study of frost- resistance properties of silica fume concrete Zhi-Gang Yin1,a,Jun Feng2,b,Shu-you Huang3,c, Bing-fang Zhao4,d 1Changchun Institute of Technology, Jilin Province Water Project Security and Disaster Prevention Engineering Laboratory, Changchun Jilin Province, china 2Changchun Institute of Technology, Changchun Jilin Province, china 3Changchun Institute of Technology, Jilin Province Water Project Security and Disaster Prevention Engineering Laboratory, Changchun Jilin Province, china 4Changchun Institute of Technology, Changchun Jilin Province, china ayzhg1972@163.com,bjunefeng@yeah.net,chuangshuyou@126.com,dzhbf890616@126.com Keywords: silica fume; concrete; freezing-thawing; mass loss; relative dynamic elastic modulus Abastract：The frost resistance of low strength concrete is researched.
Experimental method and condition 2.1 Experimental method This experimentation is mainly basis on Test Code for Hydraulic Concrete (the professional standards of water resources of PRC SL352—2006), adopting quick freezing method.
In this experiment, we used I grade silica fume with density 2.20 g/cm3, 3.5% air-entraining agent. 2.5 Mix proportions of the concrete The water cement ratio of C20 and C25 concrete is 0.5.
Acknowledgements This work was financially supported by public welfare project of the ministry of water resource of PRC (201201040) Reference: [1] CHEN Changli,TU Qingmu.

Compared with traditional irrigation methods, crop water use efficiency is 22.6%.
Information collection and distribution diagram The layout of piping take main drains and sub-drains water.
The working principle of sensor node For agricultural production, the most important environmental parameters include environmental temperature / humidity, light intensity, soil nutrient, water and the concentration of CO2, the scene at the same time image can help users more intuitive understanding of field information.
NET development server side functionality, the use of C + + component development component of the professional program.
The study shows that, to establish intelligent irrigation system based on Internet of Things technology can reduce the cost of the system cost reduction of 44.8%, compared with traditional irrigation methods, crop water use efficiency of 22.6%, compared with the similar foreign products.

Table 1: Dosages of the investigated specimens of concrete Type of sample Cement [kg] Sand [kg] Gravel [kg] Water [kg] 1 420 588 882 168 2 420 588 882 210 3 420 588 882 252 A type of cement (CP V) commercially available in Brazil was used.
According to Table 1, it can be verified that three different types of concrete samples have been molded, the only difference between them was the quantity of water in concrete.
It has also been verified that the higher the amount of water in concrete is, the lower the electrical resistivity is too.
It is know that the higher the amount of water in concrete is, the higher its permeability also is [9].
Monteiro, Concrete: Microstructure, Properties and Materials, third ed., McGraw-Hill Professional, 2005.

Finally, The saccharolytic capability of S. mutans was examined using bovine teeth that had been pretreated with CXE (1%), Xylitol (1%), CXE+Xylitol (1%), chlorhexidine (1%) and distilled water, and rinsed with distilled water.
mutans on bovine teeth revealed that distilled water and Xylitol could not inhibit bacterial fermentation.
The substantive antibacterial activity on the tooth surface was compared using a protocol that cleaned bovine teeth pretreated with 100 � of CXE (1%), Xylitol (1%), CXE+Xylitol (1%), chlorhexidine (1%), and distilled water for 10 minutes followed by rinsed with distilled water by Vortex for 20 minutes.
The evaluation of the saccharolytic capability of S. mutans using bovine teeth revealed that Xylitol and distilled water changed the indicator to a yellow color, which indicated that they could not inhibit bacterial fermentation.
Saccharolytic capability of S. mutans (CHX: chlorhexidine 1%, DW: distilled water, CXE: Curcuma xanthorrhiza extract 1%).