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Introduction The mechanism of rock burst can be summarized as the hard brittle rock in certain stress environment, the disturbance of surrounding rock of strain accumulation that can overcome the absorption of rock mass destruction than energy to make rock suddenly drawing or shear failure or a cut of the damage from the compound form of parent rocks a dynamic failure[1-3].The mechanical characteristics of rock and energy transfer characteristics is the important factors affect rock burst.
The theory is that is in the process of surrounding rock stress changes in the elastic strain energy gathered sudden release[5].From the surrounding rock properties, the energy storage characteristics of rock itself, the rock deformation characteristics curve , The possibility of rock burst and intensity can be calculated.
Just considered some single factor.
There are many influence factors, such as test conditions, rock property and other factors. therefore, cause large deviation of the results.
Different rock property and structure of the process of rock deformation markedly different, demonstrated the different between get energy and release in the process of deformation and fracture.

., Ufa, Russia a rita.babi4eva@yandex.ru Keywords: TiNi shape memory alloy; Martensitic phase transformation; Thermal expansion; Electrical properties; X-Ray diffraction analysis.
Introduction It is well known that the change of treatment temperature affects on propertiers of metals and alloys.
One of the most simple and widespread methods of improvement of mechanical properties is hot plastic deformation.
Unfortunately, the main factors of TWSME stability remain still not quite understandable especially in the case of thermal cycling without any load.
One of the most sensitive properties of material to any structural or phase composition changes is electrical resistance of an alloy.

And the performances of micro-heater devices have been tested under thermal-property experiments.
Introduction With the development of technology, mechanical systems are becoming more and more miniaturized.
But its position will get loose due to repeatedly contacting-separating to the working pieces, and eventually affect the heat conduction and temperature measurement during working period.
And as one of the key factors of performance, heating rate is directly related to the quality of tin-based brazing.

@urfu.ru Keywords: cementing, cemented optical assembly, deformation of the optical surface, hydro-mechanical method.
Introduction The choice of cement grade, bonding technology and additional heat treatment is determined by a number of characteristics, namely: the size and type of the material to be cemented, the quality of the surfaces to be joined, the technical requirements for the joint, the cement properties.
Any of these methods must meet the following requirements: do not alter the optical properties of the connected parts, provide sufficient mechanical, chemical, thermal and light durability of the compound [1].
The difference factor TCLE in these cases is equal to zero, and TCLE of quartz glass is about 2·10-7 С-1.
Farafontova, How the state of optical surfaces before cementing affects the strength of optical assemblies, J.

Implementation of Decision-making Model System for Autonomous Vehicles in Virtual Environment Yanfei Liang 1,2,a , Hanwu He 1,b, Detao Zheng 1,c and Xin Chen1,d 1 Faculty of Electro-Mechanical Engineering, Guang Dong University of Technology, 510090, China 2Mechatronics & Information Engineering School, Foshan University, 528000, China a liangyanfei@tsinghua.org.cn, b hwhe@gdut.edu.cn, cdtzheng@gdhed.edu.cn, d chenx@gdut.edu.cn Keywords: Virtual reality, Autonomous vehicles, Decision-making, Path planning Abstract.
It was studied the influence of driver's aggressiveness on lane-changed performance through considering human factors, and several longitudinal driving modes were classified and discussed.
The autonomous vehicles based on this system can be used as the vehicles in simulators and help to design traffic or help to verify the performance of vehicles. � Introduction Autonomous vehicles play a key role in a driving simulator, and driving simulator is an important tool in research and design of vehicles, study of traffic properties and driving training.
Framework of the System The framework of the system includes the environment model, the human factor models, the dynamics model, the behavior modes of the autonomous vehicles, path planning and tracking control, etc, see Fig.1.
Drivers' temperament and stimulation from outside also affect drivers' reaction time.

Investigation of Microstructure and Physical Properties of Nickel Ferrites, Synthesized via Sol-Gel Method Shaima'a J.
The diameter of the pellets was 10 mm, while the thickness varied from 0.9 to 1.2 mm, according to requirements of the structural and physical properties.
Table 1 Show Physical Properties of NiFe2O4 at 1200 °C Porosity Density Shrinkage in diameter Shrinkage in thickness 50 % 3 g/cm3 5.3 % 7.1 % 5.
Preparation and properties of nickel ferrite (NiFe2O4) nanoparticles via sol–gel auto-combustion method.
Preparation and magnetic properties of nano size nickel ferrite particles using hydrothermal method.

Sandeep1,a,2,b*, AVSS Kumara Swami Gupta3,c 1PhD Scholar, Mechanical Engineering, JNTUH College of Engineering Hyderabad, Telangana, India   2Assistant Professor, Aero Engineering, SOET, Sandip University, Nashik, Maharashtra, India 3Professor, Mechanical Engineering, JNTUH College of Engineering Hyderabad, Telangana, India Email id: ajulurusandeep@ gmail.com, bsandeep.juluru@sandipuniversity.edu.in, cavs_gupta@jntuh.ac.in Keywords: Shock wave angle, Deflection angle, Cowl, Total Pressure Ratio, Shock on lip condition.
The main objective of the present paper is to develop a detailed design procedure for Scramjet intake based on the factors discussed for various operating conditions and the design is to be verified by CFD simulations.
In the compression process while developing pressure will make the adequate loss of kinetic energy and thus affects the thrust-generating capability of the engine.
The decrease in height of the isolator will affect the mass flow requirement which is to be considered for high Mach numbers greater than 8.
Table 1: Flow properties across shock waves Parameters M0 M1 P1P0 ρ1ρ0 T1T0 M2 P2P1 ρ2ρ1 T2T1 M3 P3P2 ρ3ρ2 T3T2 CFD 5 4 3.04 2.12 1.64 3.3 2.9 2.08 1.41 2.8 3.1 2.64 1.87 Python Code 5 4 2.82 2 1.42 3.25 2.82 2.1 1.42 2.6 2.8 2.7 1.8 Conclusions This paper illustrates the procedure for the design of double ramp hypersonic intake using an analytical approach by considering the maximum recovery of total pressure, equal shock strengths and the Mach number condition of the isolator entrance.

Laser sintered polyamide 12 parts provide sufficient mechanical properties for many applications [4].
Thus, a 3D-structure may, on the one hand, provide enhanced dimensional accuracy and, on the other hand, specific mechanical properties and a reduced component weight.
The substitution of a solid volume with a less dense structure weakens the part’s mechanical properties.
For these experiments a structure with the highest mechanical properties is chosen.
Previous experiments have shown that the octet-structure provides increased mechanical properties.

Small fatigue crack growth behavior from artificial notch with focused ion beam in annealed 0.45% carbon steel Junji SAKAMOTO1,a, Yoshimasa TAKAHASHI2,b and Hiroshi NOGUCHI3,c 1,3Department of Mechanical Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka-shi, Fukuoka 819-0395 Japan 2National Institute of Advanced Industrial Science and Technology (AIST), 744 Motooka, Nishi-ku, Fukuoka 819-0395 Japan asakamoto@mech.kyushu-u.ac.jp, byoshim.takahashi@aist.go.jp, cnogu@mech.kyushu-u.ac.jp Keywords: artificial pre-crack, fatigue limit, focused ion beam, small fatigue crack growth analysis Abstract The aim of this study is firstly to investigate the applicability of a sharp notch with Focused Ion Beam (FIB) as a crack for fatigue limit evaluation.
The threshold stress intensity factor range (DKth) value of a long fatigue crack is constant irrespective of the initial crack size.
Tables 1 and 2 show the chemical composition and mechanical properties of a JIS S45C steel, respectively.
Mechanical properties ssl sB Hv 360 633 185 Figure 1.
Therefore, the evaluation which is not affected by the area is tried.

It is one of the key research topics of the large-span steel cable-stayed bridge to study deeply on the main mechanical behavior characteristics of cable-girder anchorage, clarify the static and fatigue properties of key factors and their effects, ensure structures under static and fatigue safety then.[1-6].
The cable-girder anchorage of Su-tong Bridge, which is a typical large span steel cable-stayed bridge anchor cable box girder anchorage structure taken as subject investigated, its fatigue properties have been studied by model test, of which the researches can provide design and related research of box-shaped cable-girder structure with a scientific basis.
In order to study the fatigue properties of structural anchor box, layout the strain measuring point in the key parts of the test models according to the simulation analysis results.
Fig. 3 Arrangement of strain gauges on the model (mm) The results of the experiment and the evaluation of fatigue property The test results of the main measuring points.
Mechanical features of cable-girder anchorage for cable-stayed bridges with steel box girder Ⅰ: theoretical model [J].