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Due to their concentrative property, heavy metals can be hardly degraded in the environment.
In particular, excessive content of Mn and Cd will affect various metabolic functions of plants and hereby severely restrain and impair the growth of the majority of plants.
This is the crucial factor in ecological restoration and reconstruction.
Meanwhile, mechanical pressing will damage the structure of soil in mining place and make it hardened.
As plants growing in wasteland can adapt to extreme conditions, featuring extremely great endurance and concentrative property, such plants can be selected as pioneer plants for the vegetation restoration on gangue.

On the other hand, earthquake disasters occur frequently in China, earthquake as an irresistible factor directly affect the safety of bridge; because of its unique position, great strategic significance, and huge investment, the destruction of the long span suspension bridge in an earthquake would result in substantial losses [5].
Accordingly, to study dynamic characteristic and seismic behavior of long-span suspension bridge with higher strength cable wire, to investigate the mechanical properties of this structure, and to take reasonable seismic protection system, these are of great significance on safety and economic nature of long-span suspension bridge.
Table 1 and Fig. 3 indicated that 1) the first 10 natural vibration frequencies are less than 0.15 Hz, the base frequency of NZCB is 0.037 Hz, and NZCB has a longer natural vibration period, its natural vibration periods are between 6.817s and 26.882s; 2) The characteristics of 1st vibration mode is symmetrical lateral bending of stiffening girder, it fits in with the characteristics of large span flexible structure; 3) the 1st~5th mode is main girder vibration with low frequency, the main girder vibration is easy to achieve, the 6th~10th mode is main girder vibration with high frequency and main cable vibration; the vibration of tower isn’t observed in lower frequency range, it shows that the tower has enough rigidity; 4) the vibration modes have the feature of concentrated distribution, the frequency spacing is small; 5) the different mode has a strong coupling effect, the vibration among different member can affect each other.

In order to obtain high durable repair, the repair material also has other special properties, such as high deicer-frost resistance for the scaled-pavement repair, high ability to protect steel from corrosion for the reinforced-concrete repair, etc.
Most of them are mainly centered on chemical compositions and mechanical properties of the materials [3-6].
The air content and the void spacing factor were measured for specimens only used for the deicer-frost test.
Consequently, the abrasion resistance of MPB is an important property.
(6) For the MPB materials soaked in water or 3% NaCl solution for a long time, the strength loss occurs, but is not big enough to affect the application of MPB

This is why the mechanical properties of microscale components have to be established via mechanical testing of actual components or at least on specimens with similar scale, microstructural characteristics and elaboration process.
Indeed, the deployment process generates initial plastic deformation which, coupled to cyclic loading, significantly affects the lifetime of the stent.
Note that the dissipated energy, responsible for the damage of the material, due to shearing is less involved as it is weighted by the J factor (Cf.
Cyclic hardening properties of hard-drawn copper and rail steel.
Journal of the Mechanical Behaviour of Biomedical Materials. 2009;2:210-216

Chen Department of Mechanical Engineering The University of Hong Kong, Hong Kong, Pokfulam Road, Hong Kong, China Abstract: The relationship between the deformation orientation distribution function (ODF) and the primary recrystallised ODF in cold and warm rolled metals, is not a simple mathematical transformation from one to the other, but is through thermally activated processes occurring in the deformation microstructure.
Shear band thickening and α grain fragmentation are also considered, since both processes can produce recrystallisation nuclei, which in the α fibre case can reduce desirable mechanical properties.
However is when two hard grains are in contact, it seems that the initial response is to rotate material in both grains so that the equality of Taylor factors is approached [25].
The reasons for the different optimum reductions between Al-killed and IF steels is still unknown, but the presence of interstitial carbon is known to affect both strain rate sensitivity [26] as well as work hardening.

Properties of three work-materials.
As shown in the mechanical and thermal properties of three work-materials in Table 2.1, the BMG has very low thermal conductivity, which retains the heat in the chip and activates the exothermic oxidation and, consequently, the light emission on the BMG chip surface.
From Table 2.3, three factors that affect the chip light emission in machining BMG are identified.
Properties of two tool materials.
Table 5.1 Properties of wheels used in the experiments.

Tool Path Generation for Top Planar Surface of Ribs in Aircraft Structural Parts Yunlong Tang1, a, Guolei Zheng1,b , Baorui Du2,c and Shulin Chen 1, d 1School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China 2Shenyang Aircraft Industry (Group) Corporation Ltd, Shenyang 110034, China afetghf@hotmail.com, bzhengguolei@buaa.edu, csacdbr@sohu.com, dcsl_buaa@139.com Keywords: Tool path; Rib; Aircraft structural part; Constrained Delaunay triangulation.
The key factor affecting the construction of the MCs set of RTF is the split of the face into several sub areas and the extraction of its guiding curve.
Skeletons are widely used to describe its global topological and geometric properties of an object.

The flow field in the head of the combustor is mainly affected by the structure of the secondary swirler[8].Therefore, the key of structure design is the layout of air inlets and vanes and the structural size of Venturi tubes and secondary swirler, which significantly impact the aerodynamic performance of swirlers.
Construction method of n design points, d factors LHS is as follows: In terms of certain space-filling design, suppose there are d factors, then respectively project the value intervals of all factors to d one-dimensional coordinate intervals to construct a d-dimensional unit cube [0,1]d.
During the modeling process of geometric structure, we adopt the mechanical design software UG NX, which is commonly used in current aviation industry.
By analyzing the axial velocity cloud chart at the cross-section d of the outlet flow field in swirler, we know that the rotary jet flow cone angle and the shape of the recirculation zone in Case 2, Case 4 and Case 5 are more ideal, in all of which the recirculation zone with the property of “first enlarging, then narrowing” begins to form at the outlet of secondary swirler, and the wake flow of the recirculation zone extends to the outlet of the swirler.
However, there are many factors that affect the aerodynamic performance of swirler, the above result can't achieve complete optimization.

It is due to a unique combination of the properties of the materials of this category that include the corrosion resistance, a high specific strength, a low density, and an opportunity for the manufacturing of the parts and article using different methods of the mechanical treatment.
To increase the corrosion resistance with simultaneous marking and imparting the inertness and compatibility properties to the surface, we use the method of the electrochemical oxidation of titanium.
At the same time, the film thickness defines the properties of the oxide coating and has a direct impact on the duration of the electrochemical treatment of the articles that is considered to be the basic technological parameter of the process.
Littlefair, Titanium in biomedical applications – properties and fabrication: a review, Journal of Biomaterials and Tissue Engineering. 5(8) (2015) 593-619
Shkolnikova, Studying the insulating properties of oxide films obtained on the Ti6A14V alloy in tartaric acid solutions using the method of electrochemical decoration by copper, ARPN Journal of Engineering and Applied Sciences. 15(15) (2020) 1657-1666

Thus, SERS and SEHRS can appear at comparable signal levels because of strong surface-enhancement factors.
To the extent, Kneipp et al. reported the enhancement factor on the order of 1020 comparing the near-infrared (NIR)-SERS enhancement factors of crystal violet on colloidal silver clusters [53].
Single molecule surface-enhanced Raman scattering (SM-SERS) The observation of a single molecule and its individual properties and structural transformation can provide useful insight related to intrinsic characteristics that cannot be studied in an ensemble of molecules due to averaging.
Mirkin, Selective colorimetric detection of polynucleotides based on the distance-dependent optical properties of gold nanoparticles, Science 277 (1997) 1078-1081
Hartland, Dark-field microscopy studies of single metal nanoparticles: understanding the factors that influence the linewidth of the localized surface plasmon resonance, J.