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Improving gypsum material properties and broadening its application fields are of great significance.
Too short and long time are not conducive to the realization of industrial production，because too short time is not convenient for operation, while long time affects productivity.
Addition of sawdust is the most important factor influencing, the second is the amount of water.
Study on Factors Influencing Properties of gypsum composite materials.New building materials .2007,5,1-3 [6] Wang Yuying,liu Minrong.
Study of the mechanical properties gypsum composites with alkali treated straw fiber.

This is an important factor that affect the mechanical properties and durability of recycled concrete directly [7,8,9,10].Recycled concrete has been tried to use in highway and construction engineering currently, but the influence of loading method on dynamic behavior of recycled concrete have not been researched before[11,12].
In order to study the influence of the cyclic loading frequency on the mechanical properties of recycled concrete, the loading frequency of two groups of specimens were 0.5HZ.
In order to research the amplitude of cyclic loading on the mechanical properties of recycled concrete, the maximum and minimum stress ratio of two groups of specimens were respectively 0.95 and 0.25 in the tests.
We could research the influence of loading waveform on the mechanical properties of recycled concrete by different loading waveform.
[2] Cao Wei: Experimental and theoretical reseach on fatigue properties of plain concrete under trial cyclic loading with constant lateral pressure.

Incidence can significantly affect turbine cascade aerodynamic losses, including profile, secondary and tip-clearance losses.
Determination of the Incidence Correction Factor.
(2) Turbine disk inclinations could undermine the profile-loss-related aerodynamic properties of a turbine cascade and the whole system as well.
Therefore, it is suggested that turbine disk inclination should be taken as an influential factor in the design and manufacturing process of a turbine system
Proceedings Institution of Mechanical Engineers, 1971, 185(32): 407-424

The specification of the probes is in line with international standards, including conventional probes, pore water pressure probe, and modules of temperature, resistivity, seismic waves and video probes etc, which enabled to obtain rapidly and accurately basic physical properties.
When SCPTU determines shear wave velocity of rock and soil, due to the velocity sensor’s close contact with the soil, it gives a fairly true reflection of soil properties and accurate testing results.
As shear-wave velocity relates to the factors such as type of soil, buried depth, compaction and other factors, which can also be reflected by other indicators of CPT, there is a good practice guide to geotechnical engineering investigation now by establishing the relationship between a shear wave velocity and other conventional indicators of the CPT.
Manual on estimating soil properties for foundation design.
Proceedings of the ASCE specialty conference on In-situ measurement of soil properties ISMOSP Raleigh: (1975)

Because of many links and joints, the static stiffness model of parallel robot needs to consider lots of factors, such as the influence of deformation of links, joints and drive units, and gravity of all the parts, the static stiffness of parallel robot is very complicate, it is related to branch type, mechanism configuration, structural parameters and location parameters, etc.[3].
As the gravity of moving platform and branches have little to do with the static stiffness of parallel robot [3], we ignore the gravity factors.
Modify and simplify the three-dimensional solid model to enable them to meet the requirements of ANSYS, which not only does not affect accuracy, but also save a lot of time, avoiding the waste of resources.
The element type is selected for Solid92, defining the material properties and meshing, 1043832 nodes and 658380 elements were meshed (Fig.4).
Mechanical Design. 27 (2010) 1-4

Numerical Simulation of the Effect of the Uneven Wall on the Liquid Film Flow Mei Liu a, Yongxin Zhub and Songling Wangc School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding, China aliumei_w@163.com, b zhuyongxin_hd@163.com, chdwangsl@163.com Keywords: Liquid film, flow characteristics, inclined uneven wall, numerical simulation, VOF Abstract.
Beata [7] established a two-phase countercurrent structured packing model to determine the effect of liquid and gas flow rates and physical properties of the flowing liquids on the interfacial area.
Results and Analysis Wall structure is an important factor affecting film flow characteristics.
Different wall structures affect the film formation strongly, and the smaller corrugated size λ contributes to the formation of a continuous film.The vortex generated at the wall trough is directly related to the inlet velocity, and the vortex region increases with the inlet rate.

The thermal properties of the CdS/ (MMA-co-St) were explored by thermal gravimetric analysis (TGA).
The properties of the CdS semiconductor nanoparticles are influenced mainly by their size effect.
Shin, Synthesis and electrochemical impedance properties of CdS nanoparticles decorated polyaniline nanorods, Chem.
Djokovic, Polystyrene-co- maleic acid/CdS nanocomposites: Preparation and properties, J.
Chauhan, Study of physical properties of cobalt oxide (Co3O4) nanocrystals, Mater.

During bending and unbending of metal sheets, there phenomena which affect the final result of shape formation during the stamping process are occurring.
The above-mentioned effects of the phenomena occurring in the material during cyclic plastic strain, affect the accuracy of determining the springback value in the simulation of sheet stamping process to varying degrees.
The material constants (Young's modulus E, Poisson's ratio ν) assigned to type 20 material do not cause its elastic properties.
It is worth to pay attention to the factors which have a significant impact on the consistence: 1.
Uemori, A model of large strain cyclic plasticity and its application to springback simulation, International Journal of Mechanical Sciences, 45 (2003) 1687–1702.

Results A summary of the two phase flow properties used in the STAR CCM simulation is given in Table 2; Table 2.
From all the factors available from the simulation, it is necessary to choose between the third exit configuration and the fourth exit configuration to determine a suitable pipe geometry for oil and gas application.
Decision Matrix Criteria Convergence (Iterations) Total Pressure (Pa) Static Pressure (Pa) Velocity (m/s) Pressure Drop (KPa) Rating 7 5 5 10 8 After careful rating of the different flow properties after careful consideration of available literature on the different flow properties, the exit configurations 3 and 4 was compared to each other using each criterion.
The third and the fourth exit configurations were selected to have flow properties that ensures easy flow within the production system as well as lower computational cost.
Qi, Reliability Based ECA Flaw Acceptance Criteria and Safety Factors of Risers and Flowlines.

Introduction Hardness is an important indicator of the material mechanical properties and it has been widely used in the application of the component materials, coatings, new materials design and so on.
However, in the process of image acquisition, acquisition and transfer, due to a large number of factors including the out-of-focus, comparative motion relative to scenery, loss of high frequency after light diffraction and so on, it will undoubtedly result in image blurring.
The ambiguous degree depends on the performance of the system, such as image acquisition, sampling rate and lighting conditions of obtain images and other factors.
That is to say, through the analysis of the gradient value, we can preferably delineate the edge of the Vickers indentation properties.
As the quality of indentation edges is a key factor to determine whether the Vickers hardness indentation image quality can meet the requirements.