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Online since: October 2013
Authors: Li Yang, Ge Xia
Factors above jointly affect and control the temperature field on the surface of the sea targets.
Experimental Investigation of Polyurethane Camouflage Coating Using Dynamic Mechanical Analysis.
Study on infrared stealth coatings and their properties.Applied Chemistry department of Southeast University,2006
Online since: July 2014
Authors: Gui Chen, Hong Wei Li
Moreover, compared with the MATLAB simulation tools, PSIM has the properties of very small setup capacity (less than 100M bytes), fast operation speed and good expansibility and transplantation (even it can run directly without setup process)[4].Especially, PSIM9.0 and later version add new energy power generation models such as solar cell and wind power generation.
Fig.1 Diagram of basic structure for PDWPS Mathematical model of PDWPS 3.1 power characteristics for wind turbine As a key component of the wind power generation system, the main function of wind turbine is to intercept wind energy and convert the wind energy to the mechanical kinetic energy efficiently.
So, the wind turbine not only affects the effectiveness and stability of the output of the wind power generation system, but also directly decides whether the system can run normally.
The control models and diagram are shown in Fig. 2 based on PSIM. 4.2 Modeling and control strategy in grid side The control objective of inverter in grid side is to make the DC bus voltage more stable and the grid run under unit power factor.
Unity power factor control of a direct-driven permanent magnet synchronous wind-power generator[J].
Online since: June 2011
Authors: Xue Lei Tian, Kai Zhang, Hong Liang Zheng, Yu Cheng Sun, Ning Zhang
Iron) is widely used in many industries especially automotive industry in recent years due to its outstanding mechanical properties and moderate cost.
The actual solidification process of S.G.Iron is greatly affected by solidification kinetics, which is not the case of equilibrium solidification.
References [1] M.J.Gough and J.Morgn, Feeding ductile iron castings-some recent experiments, AFS Transations,1975,84,351-384 [2] R.Wlodawer, Gelenkte Erstarrung von Gubeisen,1977 [3] S.I.Karsay, Ductile iron –gating and risering, QIT-Feret Titane Inc. ,1981,121 [4] E.F.Ryntz, R.E.Schroeder, W.W.Chaput, and W.O.Rassenfos, The formation of blowholes in spheroidal graphite cast iron castings, AFS Transaction,1983,91,161-164 [5] J.F.Wallce and P.K.Samal, Factors influencing a shrinkage cavity formation in ductile iron castings, AFS Transactions, 1984, 92,765-784 [6] R.Hummer, Feeding requirements and dilatation during solidification of spheroidal graphite cast iron-conclusions for feeder dimensioning, Gieberei-Praxis,1985,17,241 [7] H.J.Heine, Reducing porosity ,Foundry management&Technology,1992,Feb,72-76 [8] B.C.Liu, Progress in solidification modeling of cast iron in china.
Online since: August 2005
Authors: Eun Sang Lee, Y.-J. Chun, Nam Kyung Kim
Kim 3 1 Department of Mechanical Engineering, Inha Univ., 253 Yonghyun-Dong,Nam-Gu,Incheon, Korea 2 School of Mechanical Engineering, Inha Univ., 253 Yonghyun-Dong,Nam-Gu,Incheon, Korea 3 Automatic Engineering Division, Chinju National University, Chinju, Korea Keywords: Rotary diamond dressing, Centerless grinding, Current signal, AE signal, Hall sensor Abstract The optimum condition selection of rotary dressing operations using Hall and AE sensor is presented.
The surface finish is affected by the grain size, grit and bonding materials of the grinding wheel; dressing methods; workpiece material properties; dressing conditions such as rotating speed, feed speed and coolant.
Especially diamond to diamond contact type dressing for 200 mm wide-width grinding wheel is regarded critical factor to obtain high quality surface and shape accuracy of optical ferrule in centerless grinding process.
Online since: August 2020
Authors: I. Nyoman Jujur, Sri Rahmadani, Anawati Anawati, Razie Hanafi
Introduction There are several requirements for implantable material to be used in the clinic, such as high biocompatibility, sufficient strength to withstand high mechanical loads, excellent corrosion resistance, and bioactivity.
Titanium (Ti) and its alloys have become the selected material for long-term orthopedic implant applications because of their suitable mechanical properties.
Several parameters affect the EPD process, including deposition time, applied voltage, HA concentration, and substrate conductivity.
The type of solvent for HA coating suspensions is a crucial factor for the success of the EPD process.
Online since: November 2003
Authors: Sang Woo Kim, Jong Ho Lee, Hai Won Lee, Joo Sun Kim, Huesup Song
Ni/YSZ cermet anode is required to satisfy various properties as a key component of anode-supported type SOFC, since the cell performance is dependent upon anode properties.
Furthermore, anode substrate in anode-supported type SOFC should also play as a mechanical support for the thin electrolyte and cathode films and as a gas diffusion path for the supply of the fuel to reaction sites [1-3].
The electrical and electrochemical properties of anode substrate are governed not only by the electrical conductivity of the metal-ceramic composite itself but also by the appropriate connection of the gas diffusion path, in order to reduce the ohmic and diffusion polarization losses of the cell performance, respectively.
Commonly used Ni/YSZ cermet is known to have many desirable properties for anode substrate because it has both electronic conduction path through metallic Ni and ionic conduction path through YSZ.
Microstructure evolution by applied compaction pressure control affected also to connectivity of electronic conducting phase which is metallic Ni.
Online since: June 2011
Authors: Qi Lin Deng, Biao Yan, Yu Xin Wang, Gang Dong, Ting Yu, Yin Hui Yang
The in situ formed reinforcing particles are finer in size and their distribution in the matrix is more uniform, which is beneficial to mechanical properties.
The results showed that TiC particles were formed in situ in the coatings and the wear properties of the coatings were significantly enhanced.
And the wear rate in a block on ring test against hardened steel was reduced by a factor of five.
They similarly exhibit a stepwise characteristic and can be divided into three regions: coating, heat affected zone (HAZ) and substrate, respectively.
Compared with the pure nickel based alloy coating, the hardness and wear properties of the composite coating are significantly enhanced in virtue of the presence of in situ synthesized NbC particles and their well distribution in the coating.
Online since: April 2013
Authors: Jun Yao, Yu Feng Yao, Marwan Effendy
Effect of mesh topologies on wall heat transfer and pressure loss prediction of a blade coolant passage Marwan Effendy1, 2, a, Yufeng Yao2,b and Jun Yao3,c 1Department of Mechanical Engineering, Muhammadiyah University of Surakarta, Jl.
The Reynolds number (ReL0) varies in a range of 9000 - 36000, based on air properties and hydraulic diameter in the L0 region of inlet section.
Figure 2 gives predicted pin-fin HTC and total friction factor of both unstructured and structured meshes, in comparison with test data.
Furthermore, the increase of surface roughness will affect the near wall turbulent flow structure, motion and development.
This is one of key factors in using unstructured mesh to produce accurate predictions of both wall heat transfer and pressure loss.
Online since: September 2024
Authors: Aldrin D. Calderon, Jhon Carlo P. Bajaro
However, due to the specific properties of thermal pictures, such as low texture and severe distortion, effectively registering these images into BIM is difficult.
Both the BIM and the real-scene 3D model exhibit obvious rigid-body features, and both models exhibit good geometric properties that aid in detecting the point pair connection.
There are various flaws that might affect the precision of the fusion technique.
In addition, the incorporation of BIM into energy auditing will be of great assistance to auditors because it will allow them to save time without adversely affecting the precision of the data that is gathered.
Song, A modified ICP algorithm based on dynamic adjustment factor for registration of point cloud and CAD model, Pattern Recogn.
Online since: April 2021
Authors: Mohammed A. Khattab, Heba A. El-Deeb, Azza El-Maghraby
Introduction Nanotechnology is facilitating technology that allows us to develop materials with improved properties[1].
CNTs possess many unique electrical, thermal, optical and mechanical properties.
Several studies have focused on material properties of carbon nanotube-reinforced composites (CNTRCs) and have shown that the introduction of carbon nanotubes into polymers may improve their properties.[6] CNTs are well known for their excellent rigidity, higher than that of steel and any other metal [7].
Therefore, by changing the properties of the material it is possible to perform a certain function of material properties of mechanical strength and thermal conductivity [12-14].
This special attention arises from their outstanding electrical, optical, thermal and mechanical properties in combination with their extraordinary chemical stability [21,22].
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