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Many solutions trend to deploy keys into the whole network, which usually causes the leak of key materials, and one compromised node can threaten the entire network.
Therefore, it is very important to localize the key materials.
However, in LDK, nodes need to transmit all their key materials when determining the communication key, which consumes lots of energy.
Ls erases seeds and KI for preventing the revealing key materials by compromised a node.
We addressed challenging security issues by localizing key materials.

Research on Building Engineering Materials Supplier Selection Based on ANP Method CHEN Xiang1, a, ZHOU Xue Feng1, b and ZHANG Yong2, c 1School of Civil Engineering, Xi’an Technological University, Xi’an, China 2Wuhan University of Science and Technology, Wuhan, China axichen0801@163.com, bzxf0311@126.com, cappserver@yahoo.cn Keywords: building construction; material supplier; ANP; evaluation index Abstract.
Construction materials used in many varieties and large quantities, including concrete, steel, masonry, timber and other bulk building materials and a variety of decorative materials, so supply and procurement of construction materials, supply chain management the key link.
The characteristics of the supply chain structure and distribution of materials constitutes a key transportation delays.
However, in reality, the choice of engineering materials suppliers, and there is no scientific way of reference, but by experience or other means, which is blind and not objective.
China Civil Engineering Journal, vol. 37, 2004, pp. 86-91

The detection content in kinds of construction contains basic requirements, actual detection items, appearance appraisal and quality assurance materials four parts.
We can adjust the key items division according to the mechanical and electrical engineering detection situation recent years, JTG F80/2-2004 standard and the equipment state of various mechanical and electrical equipments.
But in the highway mechanical and electrical engineering quality evaluation method, key items and general items use different sampling principles.
For the mechanical and electrical engineering, the material checking should include the whole process of construction such as the equipment approach, equipment installation, equipment debug, etc.
The Highway Engineering Quality Detection Evaluation Criteria (The second book Mechanical and Electrical Engineer Part) [3] Ma, Z.B., Xiao H.: Highway Mechanical and Electrical Engineering Detection and Evaluation.

Research on Grouting Materials for Underground Construction Projects Haoran Duana, Peng Zhaob, Lei Qinc*, Fengjiao Shid School of Civil Engineering and Architectural Engineering, University of Jinan, Jinan, 250022, China a201921200738@mail.ujn.edu.cn, bcea_zhaop@ujn.edu.cn, ccea_qinl@ujn.edu.cn，dshi_fengjiao@163.com Keywords: underground engineering, Grouting material, Grout Abstract.
Based on the underground engineering, this paper introduces the research achievements of grouting materials in recent years, including cement-based grouting materials, mixed grouting materials, anti-scouring grouting materials, and ultra-fine cement grouting materials.
(2) Compared with cement grouting materials, chemical grouting materials have higher performance, which can be applied in a small scope of engineering.
Journal of Rock Mechanics and Engineering, 2011, (11): 2376-2376
Engineering, 2017, 3(006): 871-879

The Key Supporting Technologies for the Sustainable Development of Advanced Manufacturing Technology Qi Hong 1, 2, a, Lizhi Gu 1, b, Bin Cheng1, c and Qiong Li1, d 1 College of Mechanical Engineering Automation, Huaqiao University, Quanzhou, Fujian, 362021, China 2 Department of Mechanical Engineering, Jiangxi Modern Polytechnic College, Nanchang, Jiangxi, 330095, China alusia_361005.student@sina.com, bgulizhi888@163.com, cchengbin2008year@163.com, dswlq2006@163.com Keywords: advanced manufacturing technology, information technology, new materials technology, biotechnology Abstract.
Bio-manufacturing Engineering.
The main research contents of bio-manufacturing engineering are bionic manufacturing, engineering manufacturing of biological activated tissue and organ, bio-chip manufacturing, etc
It mainly focuses on the discovery or culture of microbes used for the processing of engineering materials, or the microbes with the ability of rapid propagation as well as oriented growth and forming.
(2) Engineering manufacturing of biological activated tissue and organ [7] Engineering manufacturing of biological activated tissue and organ is an engineering manufacturing technology.

Most current research is in-kind reverse engineering.
The key technology of reverse engineering Reverse engineering is a key technology for fast and accurate three-dimensional surface data.
Access to data is the first step in reverse engineering, and only accurate three-dimensional surface data to complete reverse engineering.
Reverse engineering three-dimensional laser scanning.
Complex surface kind of reverse engineering and key technologies.

One is that the manufacturing resources belonging to the MS only are Key resources, such as new production facility, monopolistic row materials etc.
The quantity and kinds of equipment, raw materials and other resources are ascertained after making the production plan.
Rao: Chinese Journal of Mechanical Engineering, Vol. 42 (2006) No.7, pp.8-13.
Xiao: China Mechanical Engineering, Vol. 20 (2009) No.19, pp.2332-2336.
Geng: Mechanical and Production Engineering Technology, Vol. 49 (2011) No.561, pp.76-79.

And then it discussed the key technologies of green furniture design in detail from the four aspects of choosing furniture materials, structural design, process design, and design for recycling.
Materials and design is complementary to each other, a variety of designs reveal its face through the materials, and express the properties of materials through designs.
A lack of materials, design activities cannot be achieved. [2] So furniture materials of careful selection and reasonable use are the keys of Green furniture design.
Therefore, we can select furniture materials based on the following basic criteria: (1)Fewer use the short or scarce materials, and use the materials compatible with the environment as far as possible, and use recyclable materials frequently
Wang: Packaging Engineering.

Recognizing that PBL shear key in all aspects of civil engineering play an increasingly important role, firstly, to do a simple analysis and discussion on the ultimate strength of PBL, followed by the use of MIDA FEA finite element model was established, then its static power loads such as displacement and stress are analyzed and compared.
Material of bridge steel takes Q345qc, compressive strength of concrete being 33.15MPa, rebar being HPB235φ10, and steel yield strength of the PBL shear being 420MPa.
A theoretical analysis and experimental study on the flexural behavior of extern ally prestressed composite beam with corrugated steel webs [J].China Civil Engineering Journal, 2004, 11(37):50―55.
The study of PBL shear key bearing capacity factors and bearing capacity formulas, Journal of Railway Science and Engineering, 2007.12(6)
Experimental study of static load introduced of PBL shear connectors bond slip behavior, Engineering Mechanics, 2012.1(1).

The article presents the strategic positions of 140 critical materials surface engineering technologies.
The purpose of own materials science and heuristic research was to: identify and characterise, in a harmonised manner, the critical materials surface engineering technologies.
Critical Technologies of Materials Surface Engineering The critical technologies of materials surface engineering are the priority technologies with the best development outlooks and/or of key significance for industry within the analysed time horizon of 20 years.
Strategic Positions of the Critical Materials Surface Engineering Technologies The individual quarters of the matrix together with the provided strategic position of the individual critical technologies of materials surface engineering are illustrated in Figs. 1, 2, 3, 4.
Dobrzańska-Danikiewicz, Computer integrated development prediction methodology in materials surface engineering, Open Access Library, 1 (7) (2012) 1-289 (in Polish)