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Through the evaluation on blasting affects of the first excavated tunnel when the last excavated tunnel in the initial stage is into tunnel hole, establish the relationship of blasting vibration disturbing degree both neighborhood tunnels to improve the accuracy.
Only the trade between the above factors and blasting technology for blasting vibration control effective is reasonable, feasible.
Attenuation Law of Leismic Wave For controlling blasting vibration effectively，researchers at home and abroad study the attenuation law of seismic wave mainly through statistical analysis for observed data at the early stage and the stage of development of the study for blasting seismic effect, and regard a quantity of explosive and the distance from the explosion center as the main factors of the strength of blasting vibration.
Sadovski proposed empirical formula about attenuation law of blasting vibration intensity of various regional according to his study: (1) In the formula: K, n—the experience coefficient is related to the site conditions and the medium properties Q—a quantity of explosive R—the distance from the explosion center K—character constant of blasting site Sadovski conform the range of constant k and coefficient Blasting Vibration Test System The field test of blasting vibration test system is IDTS3850.
Part I: Equivalent Material Property Approach[J].

The simulation results shows that the statistical attribute of these parameter introduce variation to the systems dynamics property.
Introduction Spindle system is one of the key components of a machine tool, since its performance directly affect the machining accuracy and the cutting ability of whole machine.
Of course, the more physical properties the system model considers, the more complex the application of the model will be.
Journal of Mechanical Design, 1980, 102(4),793-803
Journal of mechanical design, 2004, 126(6):1089-1105

The aim is to determine the composition and properties of fluids in situ real-time.
But because of its semiconductor property, the loss introduced by the substrate will cause SNR to reduce.
While glass is good insulator with large dielectric constant, and the corresponding quality factor Q of the stripline probe can be significantly improved.
Considering the dielectric loss and processing properties, glass is a good choice.
Saillen, F.Vincent, et al, Microfabrication of Helmholtz coils with integrated channels for NMR spectroscopy, IEEE Micro Electro Mechanical Systems.

Much understanding of the microstructural effects on the dynamic mechanical properties has been achieved.
The plateau stress is an important property to characterize the dynamic response of cellular materials and it is defined as , (4) where εy is the yield strain and εD the densification strain [10,11].
At a low impact velocity, the crushing bands are induced by many factors such as the weakest links, the boundary conditions and the height-to-width ratio of specimen, but at a high impact velocity the crushing bands are mainly caused by inertia [2].
In this case, the defects far ahead of the wave front will not affect the response of honeycomb.
Effects of meso-structure on the mechanical behavior and multi-objective optimization design of cellular metals.

Introduction The materials can still perform plastic deformation of micro accumulation when impact stress is only 1/10~1/3 of material yield strength under repeated impact loadings for mechanical engineering.
The chemical composition and mechanical property of austenitic stainless steel can be obtained from the ordinary deigns specifications and the chemical composition (mass fraction %, the same below) is ≤0.12C,≤1.00Si,≤2.00Mn,8.00~11.00 Ni,17.00~19.00 Cr and balance Fe.
Sketch map of repeated fatigue tester punch During the process of deformation test of low stress repeated fatigue, macro cumulative plastic deformation may result from many factors, including impact forces, repeated impact frequency and repeated impact times.
Mech.Engrs (1908),p.889 [3] Huang Mingzhi, Shi Deke and Jin Zhihao, in: Metal mechanical property, editied by Xi'an Jiaotong University Press, Xi'an (1986), p.184 [4] R.W.
Herman Hertzberger writing and Wang Ke translation in: Deformation o Engineering Material and Fracture Mechanics, editied by Beijing aerospace Press, Beijing(1998) , p. 312 [5] Wu Guoxun, in :Engineering plastic mechanics, editied by House of Beijing University of Aeronautics and Astronautics Press, Beijing (1998) , p. 27 [6] Fu Geyan, in: Research on Repeated Impact Fatigue of Laser Coating Parts Submitted to Doctoral dissertation (2004), p. 7-8 [7] Ha Kuanfu, in: Microscopic Theory of Metal Mechanical Property, editied by Science Press, Beijing (1983), p. 506

The establishment of seat model Seats static strength analysis of the model can be divided into the following steps: (1) The establishment of the geometric model of seat structure; (2) Choose a variety of seat structures used to simulate and connected finite elements; (3) The Finite Element discretization of the geometry of the seat, and the finite element mesh; (4) Define the elements and material properties; (5) Based on test results, verify and confirm the final simulation model.
To the late analysis and solving, it has a direct effect, which can affect the simulate accuracy and efficiency.
To ensure accuracy, the model must be able to truly reflect the geometric properties of seats and mechanical properties.
In order to improve the efficiency of simulation, modeling must also be considered in the unit type, quantity and quality and other factors.
Fig.1 Back and Seat Area are divided by quadrilateral element Fig.2 The intersection of the backrest and cushion are divided by triangular element Define properties of cell material: We need define the unit that includes element type, real constant, material properties.

Tensile Properties of the Laser Welded Dissimilar Joints.
The HT on 316L is essentially for the purpose of residual stress relief and does not have a considerable effect on the mechanical properties.
Mi­ crostructure and mechanical properties of laser welded 316l SLM parts.
Laser weld­ ing of selective laser melted ti6al4v: Microstructure and mechanical properties.
Effect of standard heat treatment on the microstructure and mechanical properties of selective laser melting manufactured inconel 718 superalloy.

A wide range of properties potentially useful in industrial applications, such as self-cleaning [1], anti-corrosion, anti-icing, reduction of friction [2], non-wetting [3] has encouraged researchers to work on durable and cost-effective solutions.
As a result, combining different processing methods, for example, etching and modification with special agents may provide material with hydrophobic properties.
The roughest of the samples with an average roughness of 155 nm, etched in 10 wt% FeCl3/HCl solution for 5 min, was considered as hydrophilic, but after chemical treatment with ODT it showed the best anti-wetting properties.
Li, Fabrication of superhydrophobic textured steel surface for anti-corrosion and tribological properties, Appl.
Fujishima, A mechanically bendable superhydrophobic steel surface with self-cleaning and corrosion-resistant properties, J.

The hot-pressed fabrication governs the mechanical properties of the ceramic tool materials as well as the composition.
However, the mentioned simulation methods are not integrated into the fabrication parameters which indirectly govern the mechanical properties by the effect on the microstructure evolution.
The small amount of additives may be effectively affected the sinterabality and microstructure evolution of ceramic tool materials.
The additives hinders grain growth and gain the fine, homogenous grain, which is advantage for improving the microstructure and the mechanical properties of ceramic tool materials.
Voids not only lead to the lower densification, but also lead to the lower mechanical properties because of stress concentration.

For the application of transparent dielectric layer of PDP (Plasma display panel), a Pb-free glass, ZnO-B2O3-SiO2 glass, was measured for thermal and optical properties after forming thick films.
Results and Discussion The thermal properties (Tg, Ts and CTE) of 42ZnO-26B2O3-10SiO2-14RO+8RF glass system showed the results, which are available for a dielectric in PDP: Tg 480℃, Ts 585℃, and CTE 76X10-7/K.
It is supposed that large size, above 10um seems to affect to form a number of pores in thick films.
Glass sintering rate depends on the packing structures, shapes of powder, green density, coordination number as well as the physical properties of glass, particle size, viscosity and surface tension [4].
In this work, considering other factors are constant except the particle size during firing stage, the inherent pores, gaps between glass particles play an important role for transmittance of thick films.