Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: August 2013
Authors: Xiao Yong Ding, Jian Pan
Fig.3 The planar graph of foundation pit excavation Fig.4 Schematic of steel pile soil nails hanging net Construction monitoring and management Due to complexity of the engineering geological conditions and hydrological condition and some uncertainties factors, design exist the probability of failure.
Reliability analysis of excavation slope Under the influence of the long and complex geological processes and human activities, the engineering properties of pit showed a greater spatial variability, so a single safety factor is not completely precise characterize the safety degree of works.
The physical and mechanical indexes of pit in the excavating range show in Table 2.
Table2, The soil physical and mechanical parameters of slope .
Factors of safety and reliability in geotechnical engineering.
Online since: July 2005
Authors: Ján Dusza, Miriam Kupková, Martin Kupka, Emőke Rudnayová
It was proven that the friction coefficient trace, considered as a geometric object, has the property of a fractal curve.
Wear process complexity is linked to a great number of properties and variable parameters which affect this process.
Experimental procedure The studied material (Si3N4 matrix with introduced SiC nanoparticles) was prepared at the Institute of Inorganic Chemistry of the Slovak Academy of Sciences by hot-pressing at 17500C for 2 h under a specific heating regime, atmosphere, and mechanical pressure in the form of discs with diameter of 50 mm and thickness of 5 mm [6].
For each of the curves or time series k mX , the length of the curve is defined as follows: .))1(()( ),,( 1 )( ),,( 1 2 ∑= −+−+ − = kmNn i li m li kimXikmX kkmNn N kL The term (N-1)/ nli(N,m,k)k 2 represents the normalization factor for the curve length of subset time series.
La Tavernier: Mechanical Systems and Signal Processing Vol.14 (2000), p. 459.
Online since: August 2011
Authors: Ji Qun Zhang, Hui Ming Jin, Ji Cheng Gao, Jun Shi, Lu Li
Influence of depositing parameters on microstructure of Ni-Co pulse plating GAO Ji-cheng , JIN Hui-ming*, ZHANG Jiqun, SHI Jun, LI Lu College of Mechanical Engineering, Yangzhou University, Yangzhou,China.
Respect to alloy electroplating, electric plating components is the important factors that affect coating performance.
Study on Electroforming Processing and Properties of Ni-Co Alloy[J].
Effect of peak current density on mechanical propertiesof nanocrystalline nickel–cobalt alloy coating produced by pulse electrodeposition[J].
Online since: March 2014
Authors: Lin Zheng Ren, Teng Fei Lei, Heng Chen, Rong Wang
Control on the D-PMSG property is less chaotic.
Wind turbines convert wind energy into mechanical energy.
The mechanical energy is converted into electrical energy generator.
Many factors affect the wind turbine, such as wind speed , air density, a radius of wind turbines R .When S is swept area, the power absorption of wind turbine is (1) K is the utilization coefficient of wind energy in equation (1).
Adaptive backstepping control of chaotic property in direct-driven permanent magnet synchronous generators for wind power [J].
Online since: December 2013
Authors: Jian Wei Zhang, Yong Wang Meng, Shi Hong Zhang
These buildings often suffer from various factors of damages within the period of its service, inevitably[1] [2].
It often occur that the actual stress area is reduced and the decrease of strength of materials due to wood truss structure easily be affected by insect erosion.
And the mechanical properties of steel will deteriorate as acid corrosion in the air.
Online since: November 2013
Authors: Fei Fei Li, Xian Ke Wei, Jin Kui Li
Introduction Rock point load test should have more and more widely to determine the rock mechanical properties and rock mass steadiness grading.
According to the research of many scholars at home and abroad ,it is found that the point load strength index of the rock is not only have relation to rock its own characteristics and so on internal factors ,but also the specimen shape and size at doing point load test[1].
Rock point load strength directly affects the rock uniaxial compressive strength, in order to measure point load strength index more accurate and convenient, retrieve the nine groups of specimens for research.
Online since: March 2008
Authors: Leonid Bogomolov, Alexander Zakupin
The work is devoted to the problem of role of ambient factors (external electromagnetic field, in particular) in the process of ageing of mechanically burden nonmetallic solids (rocks).
We tested a number of specimens, made of materials with different elastic and piezoelectric properties: granodiorite, quartzite, granite, halite, and zirconium oxide ceramic.
Besides, we remark that the effects of weak external factors cannot be studied on a usual hydraulic press because its drive produces a host of noise inevitably.
Other sources were used to reveal the significance of such factors as voltage amplitude, rate of pulse rise, and pulses repetition rate for AE activation considered.
A suggestion that EM pulses affect the softened domains on the background of quasi uniform distributed mechanical stress could explain the low value of EUT in comparison with trial loading.
Online since: May 2013
Authors: Xiao Yan Teng, Hai Bin Wang
Rainfall induces landslide, affects the stability and deformation.
After the appearance of runoff, permeability coefficient, which is related to the porosity of dump body, is the main influence factor to infiltration rate.
The measure, cleaning up the soft layer of foundation, is reasonable from mechanical stability perspective.
To ensure the safety of the deformation (affecting structural function) and stress (instability over ultimate strength), is the basic requirements of reliability design of engineering structures.
As long as landslide or deformation terminates and will not endanger the safety of lives and property at the toe, the landslide of the local step or the toe can be neglected.
Online since: December 2010
Authors: Yi Jie Gu, Zhi Ning Yang, Yu Bo Chen, Hong Quan Liu, Hui Kang Wu, Lin Chen, Meng Wang, Lin Li Zuo, Xiao Wen Huang, Wen Ge Wei, Cheng Lu, Yong Hu, Zhen Guo, Zu Wang Hu, Xiu Bo Liu
It is therefore interesting and important whether we can prepare multiphase La1-xSrxCo1-xFexO3-δ materials as composite cathodes of IT-SOFC with different Sr content in different phases to optimize the all aspects of chemical and physical properties, such as lower TEC coexisting with higher electronic and ion conductivities and higher coefficient of surface exchange process, and if not, what the compositions, structures of multiphase and relationships between them are and how it happened.
The objectives of this work are to synthesize perovskite-type multiphase compounds by sol-gel method, and study the progress of multiphase formation and the affects.
A Rietveld method is used to determine the exact coordinates of atoms, the unit cell dimensions, the atom occupation factors, isotropic temperature factors as well as the interatomic distances.
Refinement included all atomic positions, cell parameters, scale factors, background and peak shapes.
Conclusions In order to optimize of chemical and physical properties, multiphase LSCF has been synthesized by sol-gel method.
Online since: August 2022
Authors: Abdus Samad Mahmud, Nur Ainul Nurina Ishak Latiffi, Muhammad Fauzinizam Razali
Since wire force is affected by bracket friction, adjusting the bracket width can help minimise wire curvature during bending, lowering sliding resistance.
The bracket was modelled with a bilinear rigid quadrilateral element (R3D4) and given the rigid non-deformable body property.
Cheng, Comparison of factors affecting orthodontic treatment motivation of Taiwanese and Thai patients in two hospitals, J.
Radzi, Mechanical and surface properties of initial and working aesthetic orthodontic archwires, Ann.
Paulose, Comparison of load deflection properties and force level of newly introduced M5 thermal copper NiTi with other orthodontic NiTi wires: an in vitro study, Procedia Comput.
Showing 19781 to 19790 of 25965 items