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It plays an important role in defence, building, transportation and chemical industry in the form of resin and composite material[1] due to their low price, high mechanical strength, inflaming retarding, low smoke and self-extinguishing properties.
Many papers report on the reaction condition, influence factors, mechanism and modification of phenolic resin using alkali metal hydroxides, alkaline earth metal hydroxides, carbonates, ammonia and sodium hydroxide as catalyst.
Besides, reaction time has great effect on molecular weight and therefore influences the properties of phenolic resin.
In water, sodium hydroxide ionizes to a lot of hydroxyl ions and affects the reaction greatly.
Since para-position hydroxymethyl group is not affected by space and chemical effects of phenolic hydroxyl and benzyl alcohol, dehydration between para-position hydroxymethyl groups and the active para-hydrogen[6] on phenolic ring dominates, thus leading to para-para position linkage[8-9].

High levels of mechanical and radiative properties of the final product can be ensured by the development of a production technology.
Further increase of density does not raise the temperature of the process and, therefore, does not affect the phase composition of the final product, and the properties of the resulting material.
The established difference between the numerical and instrumental experiments is related primarily to the following: the initial temperature affects not only the thermodynamic parameters of combustion wave propagation (primarily, the coefficients in the heat conductivity equation), but also the kinetics of the chemical reactions that was not taken into account in the developed model of the thermal state.
The model allows determining the process temperature at the stage of blend preparation as a function of main SHS control factors.
Dudina, Application of self-propagating high-temperature synthesis and mechanical activation for obtaining nanocomposites, Combust.

Accurate prediction of cutting force in elliptical vibration cutting process is not only an important basis to properly choose of cutting parameters and optimal tool geometry parameters, but also a key factor to improve the processing property of cutting.
Based on simulation analysis of the cutting force model, this paper predict the rules that vibration amplitude and angle of tool geometry affect on cutting force, which provide theory basis for choose cutting parameters and cutting tool parameter in EVC.
In this paper, through detailed analysis of elliptical vibration cutting process, the cutting force theory model is established on the analysis of several factors effects on cutting force, and the influences of elliptical vibration parameters and tool parameters on the cutting force has also be discussed.
In Eq. 12, is defined as an angle between the tangential point of resultant cutting speed and the beginning of the straight flank area, whose value area is : (12) when , it reach maximum value , the time is , and tool nose will not affected by force any more when it exit from contact.
We defined the force piecewise functions of tool edge in direction and direction are shown as follows: (13) (14) (15) (16) Effect of amplitude ratio () and rake angle () on cutting force Amplitude ratio and rake angle The cutting force is changeable during the process of elliptical vibration cutting and influenced by many factors.

Introduction The most commonly used die cast magnesium alloy is AZ91 which has good combination of castability, mechanical properties and corrosion resistance [1, 2].
For improving the mechanical properties at elevated temperature, rare earth elements were added [4].
The main aim of SSM process is to obtain small rounded globules in order to improve the thixotropic behavior and the mechanical properties of the alloy, therefore refining of the globules becomes very important.
Ebert, "Magnesium Properties-Applications-Potential", Materials science and engineering A, 302, 2001, pp. 37-45
Mabuchi, "Effects of Ca addition on the microstructure and mechanical properties of AZ91 magnesium alloys", Journal of materials science, 36, 2001, pp. 3035-3040

The following factors maybe contribute to this deviation.
b) The experiment environment such as temperature and electrode material affects the experimental results.
Several factors that affect the DEA’s actuation characteristic including stiffness and original length of compressive spring, actuation voltages are all analyzed.
[14] Yeoh O.H., Characterization of elastic properties of carbon-black filled rubber vulcanizates, Rubber Chem.
Mechanical properties of living tissues, 2nd edn.

This will query and manage projects bring great convenience, giving the property management work to bring greater efficiency, which is the property management standardization, modernization and an important symbol.
For owners of the system also provides two functions, one is published complaints function for the owners to make their own property management division of property management comments and suggestions.
Both views are the people in different locations normal psychological response, these subjective factors aside, a proper understanding of the objective test is important because the target to determine the direct decided to test the design, and ultimately affect the test results correctness of the program evaluation.[8-10] 3.2 White Box White-box testing, also known as structural testing or logical drive test, which is in accordance with the internal procedures of the structure test procedures, test to detect whether the action inside the product design specifications in accordance with the provisions of normal, test whether each path in the program can press reserve requirements to work properly.
Property management platform designed to achieve a basic functional requirements.
Introduction to Database Systems, Beijing: Mechanical Industry Press, 2002 [11] 2000 software reported [J].

Surface Modification and Preparation of High Purity Nanometer Magnesium Hydroxide Using Impinging Stream Jianhai Zhao 1,2，a, Yanping Lai 3,b 1Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction, Tianjin, 300384, China 2 Tianjin Key Laboratory of Water Quality Science and Technology,Tianjin, 300384,China 3Department of Energy and Mechanical Engineering, Tianjin Institute of Urban Construction, Tianjin, 300384, China aemail：jhzhao@tjuci.edu.cn，bemail：laiwei@tust.edu.cn Keywords: impinging stream; surface modification; magnesium hydroxide Abstract: High purity nanometer magnesium hydroxide is produced by impinging stream reaction crystallization method using bischofite as feedstock.
Effects of operation conditions on the impinging stream of Mg (OH)2 are reported and the control factors of purity are confirmed.
Results and discussion Morphology and purity of nanometer magnesium hydroxide Nanometer magnesium hydroxide synthesized by impinging streams reaction crystallization were distinctly characterized according to their sizes and morphologies, which are strongly affected by the initial reactant concentrations, reaction temperature, impinging streams rate.
Such high contents affects negatively the rheological and mechanical properties of the composite, such as increasing melt viscosity, reducing elongation at break and impact strength[9].
Although the effect of functional groups on the surface properties of the particles is not clearly understood, the characterizations of magnesium hydroxide after surface modification as the flame retardant are favorable to reduce the loading level, increase the flame-retardant efficiency and improve the compatibity of Mg(OH)2 and polymer matrixes．

Study on Durability of C100 Concrete in Shenyang Royal WAN XIN Hotel Da-Li Zhang1,a, Yuan Wang 1,b , Cui-Hong Chen1 1 Liaoning Province Building Science Research Institute, Shenyang 110005, liaoning,China a mail: zdl_3000@sina.com; bmail: lnwy@yahoo.com.cn Keywords: super-high strength concrete; durability; tests Abstract: Durability of C100 concrete in Shenyang WAN XIN Hotel engineering including long-term mechanical properties, dynamic modulus of elasticity, and chloride ion resistance was tested and analyzed.
Change of dynamic modulus of elasticity Determination of dynamic modulus of elasticity is a possible examination method in durability tests, and mainly uses to examine the internal structure change of concrete under each kind of factors.
And if it drops, there are some damages, and then the durability of long-term concrete will receive affects.
The research indicates C100 concrete can guarantee the stability of the long-term mechanical performance sufficiently and not deteriorate although its water-cement ratio is very low. 2.

As using different geometry, load properties and boundary conditions, it can incentive the external prestressing curve beam and mimic activity characteristic.
With the service operation of curved beam structure, to some extent many external factors will caused by the weakening and damage of curved beam structure’s performance.
While using external prestressing technology, the curved beam structure with enhanced mechanical properties will be a very effective reinforcing means [11-12].
Connection anchor of anchorage device is to achieve transfer of the external prestressing .The joint’s subtle change is likely to have an impact on the overall structure properties.
The external prestressing reinforcement process of curved beam will be subjected to a number of factors and limitations.

The physical properties and microstructures of supporting anodes are crucial for the performances of the entire SOFCs.
These factors decrease with increasing porosity, and hence usually a porosity of around 40 vol.% is regarded as appropriate.
The big pores may be beneficial to the Transport of the gas, but also may decrease the TPBs to hider the contaction between Ni, block the conducting channel in the anode, make the anode loosen, effect the electrical Properties and Mechanical Properties of the cell.
[5] R.M.C.Clemmer, S.F.Corbin, Influence of porous composite microstructure on the processing and properties of solid oxide fuel cell anodes, Solid State Ionics. 166 (2004) 251–259
Oh, Microstructure and anodic properties of Ni/YSZ cermets in solid oxide fuel cells, Solid State Ionics. 98 (1997) 39-41.