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The Study on Key Factors of Soil Seed Bank in Vegetation Restoration Mengxuan He1,a,Hongyuan Li1,b 1College of Environmental Science and Engineering,Nankai University,Tianjin 300071,China ahemengxuannku@126.com, beialee@nankai.edu.cn Keywords:soil seed bank; vegetation restoration; orthogonal test Abstract: The soil seed bank (SSB)is regarded as “potential genetic pool” of ground vegetation, which has functions of recalling vegetation history.In practical vegetation restoration engineering,the transplantation of alien species is the most popular method,which will influence the stability of ecological system.The soil seed bank has the advantage ofnatural regeneration,so it will become new afforestation materials.In order to enhance the feasibility of engineering application, orthogonal tests were set with three factors (the top soil thickness, the covering thickness and the number of adding seeds) and three levels.The results showed that:1) compared with blank tests,the orthogonal
At present, researches of SSB mainly focus on basic researches (composition, density and community structure,et al),researches on factorsof engineering application are very rare[5].The most typical example was the experiment carried out by Liu Meizhen in HunShanDaKe Desert,the study found that in the late restoration period, the diversity of natural reserves was higher than artificial lands.
According to the above, orthogonal tests with three three factors and three levels were set.The purpose of the study was to explore low-cost restoration method,giving constructive introduction of ecological application engineering[6].
Materials and methods Brief introduction of sampling sites Wuqing Low Carbon Park is lacated in Yixian Industrial Park(39°24′16″N, 117°01′32″E).The southwest side is water area, the rest of the park is land area.Arbors in this park are mainly common native species,such as Ulmus pumila, Ailanthus altissima, Tamarix chinensisand so on.The coverage of arbors was 20%;Shurbs are mainly Lespedeza davurica, Amorpha fruticosa.The coverage was10%.The herbaceous plants are mainly Setaria viridis, Scirpus planiculmis, Viola philippica, Taraxacum mongolicum.The species richness and quantity ofherbaceous plants are higher than arbors and shurbs.
This is the main reason to add arbor seeds in the restoration engineering.

Advanced engineering technologies available for applications such as the micro-electro-mechanical system (MEMS) technologies are used.
And artificial insect wings and thoraxs with different materials by MEMS Technology are fabricated and analyzed.
Flapping-wing MAVs have very high demands on the materials which must have the light weight, high tensile strength and so on.
Structural materials we selected are commonly used in MEMS, mainly SU-8, Titanium alloy, Parylene-C and so on.
These materials are commonly used in the MEMS field, and through simple process, they can be assembled in the microrobot insect.

Examples are given of test measurements of the characteristics of the structure and properties of elements used in key materials of modern technologies, as well as some compounds based on them.
New materials and methods of controlling the key parameters of phase transitions in substances, especially of the cooperative (collective) type, are being developed.
Among them emerging new important phases, defects and processes from which engineering materials are described, as well as taking into account the synergy of their influence.
In this paper, we consider 3D-models for technologists based on the methods of multi-factorial analysis, for the recognition and subsequent classification of the key characteristics of materials.
In this case, these are the mass and amount of substance as two complementary forms of the matter, or in engineering as a unit for controlling the operation of a device or a system of connected devices.

Designers are still seeking novel, smart and advanced materials.
A metamaterial could be fabricated by the 3D-printer device, either from a single material or bi-materials, or multi-materials.
Therefore, metamaterials could be a novel topic in tissue engineering.
Design Keys The design process of a metamaterial structure is a key for engineers, which could be handled by topology optimization.
One other application of bi-material or multi-material metamaterials (4M) could be in tissue engineering.

The principle of extracting the engineering semantic is shown in Fig.2: (1)First, the attributes of parts are read, and the handles of geometry features annotated with engineering semantics are found; (2)Then, the geometry features annotated with engineering semantic are found according to the handle; (3)The engineering semantic which saved in the features is loaded and the key geometry descriptions of features are extracted and can be identified by "featureid".
Fig. 2 The method for extracting the engineering semantic markup Feature extraction.
The model then is not only the geometry model but the physical model with the engineering semantic.
Fig. 4 The method of finding features which are marked engineering semantic XML mapping algorithm.
XML files have the tree structure, when using the engineering semantic annotated XML files to map the FEA template files based on XML, the FEA template act as query tree, engineering semantic files act as data resource tree.

Constructing a new mode of teaching demonstration center of experimental teaching of mechanics of materials Chen Yun-xin School of Electromechanical &Architectural Engineering，Jianghan University，Wuhan, 430056, China 2098558413@qq.com Keywords:Mechanics of materials; integration; three levels; experimental teaching Abstract:By constructing a new mode of "integration of material mechanics teaching demonstration center, three levels of" experimental teaching, teaching content and teaching mode reform and innovation of the traditional, improve experiment teaching on cultivating the students' experimental ability, scientific thinking and methods, the innovation consciousness and ability in position; to be promoting one of the basic forms of teaching quality education.
Introduction Mechanics of materials is a science based on experiment, "experimental" teaching occupies a special position in the whole education in mechanics of materials in the teaching process, for the coordinated development of students' knowledge, ability, thinking and quality plays a vital role.
Therefore, in order to "cultivate ability, improve quality" as the main line, to cultivate innovative talents in the new century and application type talents in the new century as the goal, to update the contents of experiment teaching, according to the requirements of teaching organization integration, multi-level, opening the laboratory resources reorganization, purchase as the focus, to improve teachers is the key to effective and reasonable, "experimental teaching management system and performance evaluation system" for the practice teaching system security is the core of the problem need to break through the current experiment teaching reform of Higher School of mechanics of materials, is the key institutions of higher education and teaching reform of mechanical engineering. [3] The specific content the reform of mechanics of material experiment teaching system about " integration, the three level" 1 To Scientific Outlook on Development recombinant experiment teaching contents
Summary The practice of the reform of experimental teaching system and mechanical "integration, the three level" material in the course of the experiment of material mechanics of material forming and control engineering classes in our school on, and achieved very good results, the students learning enthusiasm is particularly high, the final average grades are excellent, the ability to analyze and solve problems has been greatly to improve the.
Mechanics of materials [M].

Engineering Feasibility Study On The Beijing East 2nd Ring Underground Road Wu Jin-gang1,a , Chen Ren-dong1,b , Bi Qiang1,c, Guo Hua1,d 1Beijing General Municipal Engineering Design and Research Institute, Beijing 100082, China awjg_0203@sohu.com, bcherd@bmedi.cn, cbiqiang211@bmedi.cn, dguohua@bmedi.cn Keywords: Underground road; east 2nd ring road, traversal subway tunnel, engineering feasibility.
At the same time, they can apply rapid transit travel services for key functional areas.
According to the geological survey and the actual engineering data, FLAC3D model is adopted in the calculation.
Material parameters are shown in Table 2.
References [1] Beijing General Municipal Engineering Design and Research Institute, “Beijing East Second Ring Road in underground diameter line engineering design”, 2011.8

The divisional design method can improve resistance to progressive collapse obviously and is of certain reference value for engineering.
Consequently, it has been used in gymnasium, exhibition and civil engineering structure.
Material of the structure is Q235 steel.
Stress-strain curve of the material is shown in Fig.5.
To sum up the above arguments, the train of thought proposed in this paper which includes analysis of the key elements and divisional design is of certain reference value for study of resisting progressive collapse and engineering.

Study on Sintered Wall Materials Made Use of Iron Tailings and Waste Rock JIAN Shou-wei a YUAN Long b LV Yang c TAN Hong-bo d LI Xiang-guo e MA Bao-guo f Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education,WHUT,Wuhan 430070 ajianshouwei@126.com, b 332449709@qq.Com, c 282849820@qq.com, dthbwhut@163.com, e lxggroup@163.com, fmbgjob@163.com Key words: iron tailings; waste rock; sintered wall materials Abstract.
This paper presents the study on sintered wall materials made use of iron tailings and waste rock.
Experimental 2.1 Raw Materials Raw materials come from Xingning Rising Limited include: Tailings(A) and Rock (C).
Chemical composition of the two materials are list in Table 1.
Compressive strength testing machine: Wuxi East building materials plant JES-2000A-type strength machine.

Shankar2,b 1,2School of Engineering and Information Technology, University of New South Wales at The Australian Defence Force Academy, Canberra, Australia.
This paper presents the main results of the numerical investigation on the shear behaviour of a composite sandwich primarily designed for naval engineering applications.
In fact, composite sandwich structures are preferred over many conventional materials in various industrial applications.
A comprehensive testing program has been performed to characterize the mechanical response of the sandwich panel and the constituent materials.
Allard J.F. and Atalla N. , Propagation of Sound in Porous Media: Modelling of Sound Absorbing Materials, 2nd Edition, John Wiley & Sons, Ltd., 2009