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It can not only bear a certain amount bending moment but also has a certain ability to rotate at the same time. what’s more, it has the very good ductility and energy dissipation properties.
Its performance affects the whole performance of the structure [5,6].
Table 1 Main material properties of specimens Serial number Specifications material quality Provides plastic elongation strength Rp0.2(MPa) tensile strength Rm(MPa) Elongation △L/L(%) 1 HW300 Flange Q235B 277 430 31.0 2 HW300 Webs Q235B 274 436 35.0 3 HN350 Flange Q235B 268 445 32.0 4 HN350 Webs Q235B 298 438 36.0 Testing design and testing program The test has designed making 2 node specimens, and they are respective cross frame node and T plane frame node.
Figure 4 Steps of type cross node loading Figure 5 Steps of type T node loading Figure 6 The damage form of type cross nodes The type cross node load is elastic stage at the initial stage, and there is almost no residual deformation after unloading with good elastic properties, so that there is no obvious changes in specimen when you look at it.
Based on the analysis of the hysteretic curve and skeleton curve can be obtained under low reversed cyclic loading, the yield displacement of frame node, ductility, energy dissipation and other properties [13], are shown in table 3 and table 4.

The new walking pattern is characterized by: reduced speed of walking; long double support period; early foot contact on the unaffected side; limited ankle dorsal flection at initial contact and during stance; knee hyperextension in stance phase and diminished knee flexion in swing phase on the affected side.
All these changes are given by: diminished strength due to low levels of power generation in many muscle groups, changes in mechanical properties such as increased spasticity of plantar flexors and knee extensors [6].
They also point out that the same type of asymmetry can be caused by various factors.

However, quality of cast steels is highly relative to fabrication technologies e.g. shrink cavity shapes and sizes were greatly affected by the cooling velocity of cast process and the wear resistance of high Cr cast steel was mostly relative to austenite content [5].
Mechanical properties are around 188 GPa for Young's modulus, 254 MPa 0.2% proof strength, 453 MPa ultimate tensile strength, 26 % elongation, and 45 % reduction of area.
After testing, growth rate data, da/d�i, at the crack size, ai, are evaluated by a differential method to the crack length-fatigue cycles (a-�) relation by the quadratic polynomial with the local five data 2 2 1 2 2 1 1o       − +      − += C C� b C C� bba i i i ; 1 1 2 1 ≤ − ≤− C C�i ; ( )nini ��C −+ − = 5.02 ; niini aaa + − ≤≤ (1) ( ) 2 2 1 2 2 1 2 d d C C�b C b � a i i − +==      (2) Furthermore the stress intensity factor range, ∆Ki, at ai is defined as ( ) ii KRK max1−=∆ ; ( )iii fWBPK α max max = ; ( ) ( )( ) ( ) 5.1 4 3 2 126.572.1432.1364.4886.0 iiii i i if αααα α α α −+ −+−+= ; Waii =α (3) where Pmaxi is maximum value of ith cyclic test load; Kmaxi is maximum value of stress intensity factor with respect to Pmaxi and ai.

We can potentially explain Ni NPs stimulating nitrification by a fact that Ni activates NR enzyme and can be found in urease, hydrogenase and co-factor F430.
Nickel can also be replaced with ferrum, which is a co-factor for nitrification enzymes.
Salar, Reverse Micellar Synthesis, Characterization and antibacterial study of nickel nanoparticles, Adv. in Control, Chem., Civil and Mechanical Eng. 17 (2010) 88-94
Guo, TiO2 and ZnO nanoparticles negatively affect wheat growth and soil enzyme activities in agricultural soil, J.
Korchagin, Methods of study of the physical properties of soils, Agropromizdat, Moscow, 1986

Investigation of Cleavage Fracture Behavior in Notched Specimens of a low Alloy Hot Rolled Steel 16MnR Yanguo Liu1, a,* 1 Zhejiang Institute of Mechanical and Electrical Engineering,Hangzhou, china aliuyanguo68@163.com, *correspondence author Keywords: hot rolled steel, notched specimens, inclusion particles, fracture behavior.
The yield strength sy can be obtained from the tensile curve, and the work hardening index n and the work hardening coefficient K can be obtained from the power exponent relational expression of hardening, s=Ke n, providing material property parameters for finite element analysis.
Results 3.1 Tensile test results The mechanical parameters of low-alloy hot-rolled 16MnR steel material measured from standard tensile tests are listed in Table 1.
(a) −196℃ (b) −130℃ Fig. 4 The microscopic graph in front of the survived notch in double-notch specimen. 3.4 Results of FEM and 4PB mechanical properties Fig.5 shows the stress and strain distribution of the front notch end at different loads calculated by FEM, and then the corresponding critical normal stress sy and the critical plastic strain e pc when the cleavage fracture occurs at the crack initiation can be determined, and the values are listed in Table 2.
This is SIC crack initiation, in which the strip crack promotes the fracture. 4.2 Effect of temperature on cleavage fracture initiation type The temperature affects the type of cleavage fracture initiation significantly, and the IC crack initiation changes into SIC crack initiation when the temperature is increased.

Introduction Wood, as a construction material, possesses many beneficial properties: environmental friendliness, low weight of timber structures, ease of disposal or further processing, resistance to chemically aggressive environments, and durability.
A shear correction factor k is used to analyze shear stiffness within this theory.
The composite beam theory (CBT) allows the calculation of multilayer structures without limitation on the number of layers, their geometric or mechanical properties.
Mechanical characteristics of wood: Modulus of elasticity E=11600 MPA, shear modulus at roller shear Gs=65 MPa, Poisson's ratio μ=0.25.
Schickhofer, Properties of CLT-Panels Exposed to Compression Perpendicular to their Plane, CIB-W18, 44-12-1, Alghero, (2011)

The Existing RC Building under Consideration Geometry, material properties and structural details.
The mechanical properties of the construction materials were taken from limited in-situ testing.
The mean strength values were divided by a Confidence Factor CF of 1.2 corresponding to normal knowledge level KL2.
This damping is evaluated as a weighted average of the equivalent viscous damping factors of bare frame (x(F)) and dissipative panels (x(DB)), as follows: (1) Figure 5: Seismic retrofitting of the existing RC building by metal shear panels.
Thus, the equivalent linearization procedure might adversely affect the accuracy of the pushover procedures.

Introduction At present, much of the activity of scientists is focused upon understanding the relationships in the sequence, synthesis ↔ structure ↔ properties, of solids in order to boost the preparation of materials having the required properties [1].
Indeed, "perfect" - and most "bulk" - solids do not possess desirable properties.
This condition is very important for preserving the adsorption and catalytic properties of the material.
We assume that similar factors are valid in the case of the ZrO2GeO2 co-precipitation realized in the present work.
Optical properties of Zr-Ce-Al-O glassy products.

The literature [2-3] presented different design methods with the magnetic properties and the structure design of magnetic powder clutch, in order to reduce the energy loss and improve the performance of torque transmission.
The transfer torque of magnetic powder clutch is not affected by the speed for the rotary member.
China Mechanical Engineering, vol.16, no.11, pp.1029-1033, 2005
Journal of Mechanical Engineering, vol.46, no.13, pp.116-121, 2010 [5] Xiaogang WU, Xudong WANG and Tengwei YU.
Fuzzy control research of magnetic powder clutch based on variable learning factor particle swarm optimization[C]. 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, vol.4, pp.117-120, 2010

Overview of the Technology of Bionic Surface Drag Reduction Gu Yunqing1,a, Dai Dongshun1,b, Mou Jiegang1,c,*, Zheng Shuihua1,d, Wu Denghao2,e, Wang Evan3,f (1College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014, China) (2Zhijiang College, Zhejiang University of Technology, Hangzhou 310014, China) (3Institut National Polytechnique of Grenoble, Joseph Fourier University, Grenoble 38031, France) aguyunqing@hrbeu.edu.cn, bdaidongshun@163.com, cmjg1964@zjut.edu.cn, dzneu@zjut.edu.cn, ewudenghao@aliyun.com, fzhaoheu@gmail.com Key words: Bionic, Drag reduction, Non-smooth Surface, Bionic jet surface.
It is important to reduce the friction resistance between water and the gun barrel in the upper water cannon fire extinguishing to improve fire water gun range, protect the property and reduce the loss.
Zhang etc [12] made some experiment research on rotation body about dimpled of bionic surface drag reduction, a quadratic rotatable design with 3 factors and 5 levels for each factor was used to optimize the parameters of the dimpled surfaces, they found that the dimpled surface at the back of the rotation body can maximum reduce 4.98% of the front of viscous resistance and 2.69% of bottom resistance.
Harbin: Harbin Engineering University, College of Mechanical and Electrical Engineering, 2013
Affecting of riblets shape of nonsmooth surface on drag reduction.