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Moreover, if the traffic accident happened in the operation process, the asphalt pavement with the gasoline or diesel may catch fire, and the smoke will release large amounts of harmful substances, which is not only directly threated to people's life but also serious to escape and rescue work [1, 2].
Acknowledgements The authors gratefully acknowledge the financial support from National Key Technology R & D program: National Western Traffic Scientific and Technological Program (No.200531881213), Henan Transport Department Science & Technology Project (No.2010PII10), Education Department of Henan Province Natural Science Research Project (No.2011A580001).
Shen, Analysis on the road tunnel accident prevention, Safety and Environmental Engineering, 2 (2009) 66-70
Malliek, A laboratory study on CO2 emission from asphalt binder and its reduction with the use of warm mix asphalt, International Journal of Sustainable Engineering, 4 (2009) 275-283

Insulants used should meet thermal engineering and fire protection requirements and ensure ecological safety during buildings service life.
Windless zones located in proximity of the buildings use to accumulate contaminants which may delivered together with supplied air into the building thus affecting ecological safety.
Datсiuk, Estimation of natural ventilation efficiency of residential buildings, The work of V international conference «Theoretical basis of heating and ventilation », November 2013.
Grimitlin, Aeration of Industrial Buildings, World Applied Sciences Journal 23 (Problems of Architecture and Construction), (2013) 50-54
Puhkul, The simulation results of microclimate apartments with various types of heaters, Civil Engineering Journal, 6 (2013) 12-21.

At the same time, traffic accidents occur frequently, which have brought a great deal of life and property persecution to individuals and countries.
Highway rear-end is the main form of accidents, the study also showed that if a driver can advance a second to realize there is risk of accident and take appropriate corrective measures, the vast majority of accidents can be avoided [1, 2].So as an active vehicle safety system, automotive collision avoidance not only attracted a lot of attention of domestic and foreign automobile researchers, but also made great achievements..
Conclusions As the relationship between cars and people becoming increasingly close, a great deal of traffic accidents, we will demand higher and higher of automotive collision avoidance systems.
Journal of Nanjing Forestry University, 2000,24（4）
International Electronic Elements, 2012,20（9）: 99-101..

Based on the risk factor decomposition method, we analyzed risk factors and worked out urban rail traffic BT project risk factors set, as shown inTable1.
The Principles of Comply with International Practice.
For international has a similar maturity practice in project risk allocation, we can share the risk according to the principle of following international practice, such as general international FIDIC construction contract.
Good project governance for proper risk allocation in public private partnerships in Indonesia[J],International Journal of Project Management, 2006,(24): 622-634 [4] Zhang Suibo,He Bosen.
Discussion of risk sharing in engineering project contract [J], Journal of Tianjin University (Social Science Edition), 2003(7): 257-261 [5] Liu Xinping,Tu Shouqing.The PPP project risk allocation principles and framework [J], Building economy, 2006,(2):59-63

Subgrade stability plays an important role to ensure the safety of pavement structure.
ASTM International. 1(6), (2004)1-12
ASTM International. 1(6), (2004) 1-16
Hung: Successful application of CLSM on a weak pavement base/subgrade for heavy truck traffic, J.
Lee: Beneficial reuse of construction surplus clay in CLSM, International Journal of Pavement Research and Technology. 4(5), (2011) 293-300

International public cryptographic algorithms based on the combination of characteristics to generate dynamic password, be careful modifications, nonlinear iterative calculation by more than ten times to complete full time parameters and key mixed diffusion.
Network password machine to achieve a network-based Virtual Private Network (VNP) technology and safety equipment.
Virtual private network is a public open network refers to as the basic transmission media, network traffic through encryption and authentication to protect the transmission of private information on the public network is not theft and tampering, similar to the private network to the end user performance Web services technology.
Clear the functions of safety management institutions, establishing and perfecting the network system of safety procedures; improve the software safety, equipment safety, operational safety, security management; increase network security operations personnel review, training and assessment, guaranteed operator's safety management.
Build the network information security system Journal of the China Society for Scientific and Technical Information, 2006, (5) 18-20: [7] Fei Li.Network encryption security system design and realization .

The subjects were invited to join a signalized traffic safety quiz in the classrooms without instructor, i.e. we established an unsupervised learning environment.
The International Journal of Management Education. 3 (2003) 43-56
Journal of Vision. 11 (2011) 1327-1327
Journal of Neural Engineering. 9 (2012) 046016
International journal of computer vision. 57 (2004) 137-154

Yuan: Journal of Shenyang Jianzhu University, Vol.25 (2009) No.3, p.56.
[6] Hara, F: Transactions of the International Conference on Structural Mechanics in Reactor Technology (Tokyo, Japanese, 1985).
Liu: 2011 International Conference on Structures and Building Materials (Guangzhou, China, January 7-9, 2011).
Dario: Journal of Engineering Mechanics, Vol.133 (2007) No.7, p.735
Huang: Journal of Construction Machinery, (1995) No.4, p.13.

· Network management system with high hardware configuration, it is expensive; · It uses centralized management structure, which increases network traffic; · It is complex to install, operate and maintain; · Expansibility of the system is limited; · As the development of new technologies (such as: web technologies, java technology, etc.), the application of traditional network management has limitations.
This paper firstly introduces web-based network management technology, including: the implementations of web-based management system, key technology and safety factors; and then introduces the related knowledge of network management systems including the concept and principle of simple network management protocol (SNMP), structure of management information (SMI), management information base (MIB), and so on; finally, designs and implements a SNMP-based Web network management system which has features of flexible structure, easily extensible, user-friendly features and so on.
Linux Journal, 1997, 3(8):2~3 [5] Md Jakir H, Abd Rahman R, Mohd K.
International Journal of Network Management, 2007, 17(1):33-50 Fig.1 Agent-based solution Fig. 2 Embedded-based solution Fig.3 SNMP management model Fig.4 The architecture of the web network management system

Parks and Schofer (2006) proposed that for an ideal pedestrian environment design, it should consider its sidewalk, parking lot division, building reduction, traffic blockage, type of cross-interaction, and regional population density.
Safety Safety included four analyzing items: pavement condition, pedestrian road crossing safety facility establishment and maintenance condition, pedestrian protection facility establishment and maintenance condition, and water inlet grille establishment on sidewalk.
It reflected that the safety of sidewalk in various local regions has an ideal performance. 3.
In the practical conduct, the result of BB2 safety in “Pedestrian Road Crossing Safety Facility Establishment and Maintenance Condition” was also relatively low.
Kelkar, Sidewalk potential trip points: A method for characterizing walkways, International Journal of Industrial Ergonomics, pp.1031-1035, 2006