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Online since: August 2013
Authors: Ji Ping Zhou, Ke Wang
It has been extensively applied in the industry of mechanical manufacturing, nuclear, aerospace, energy and transportation, petroleum chemistry, building, electronic and etc.[1] But, one key aspect of the automatic stamping processing line is to develop a mechanical manipulator with the characteristic of the high-speed and dynamic transmission and the design of double open buttress unit.
ADAMS (Automatic Dynamic Analysis of Mechanical Systems) can directly create completely parameterized mechanical system geometric model, also can use from other software (such as SolidWorks) modeling realistic geometric model, then impose such as constraints, force, torque ,incentive motion and etc on the geometric model, finally the stamping processing complete set of control line system can be tested by interactive dynamic simulation analysis to predict the true performance of the mechanical structure, at the system level, so as to realize the optimal design of the system level[6-7].
The line of press automatic production is composed by multiple presses, as well as logistics delivery unit, how to ensure the reliable operation of each operating unit coordinated, lies in the control system, control system’s structure scheme and its functions involved in the system’s reliability, security and economic.
And this has put forward higher requirements to the mechanical structure, material friction characteristics, and structural dynamic characteristics of the robot manipulator[8].
Online since: August 2022
Authors: Kozo Taguchi, Dang Trang Nguyen, Akihiro Yamazumi
In particular, the core/shell structure, in which titanium dioxide is formed around SiO2 particles, has been reported to improve light utilization efficiency and surface area, as well as photocatalytic activity and electrode performance [10,11,12].
High-Performance Multifunctional TiO2 Nanowire Ultrafiltration Membrane with a Hierarchical Layer Structure for Water Treatment.
Materials Chemistry and Physics, 106(1), 39-44 [12] Suim, S., Sun, H., H., Chanhoi, K., Ju, Y., Y., & Jyongsik, J. (2013).
Designed Synthesis of SiO2/TiO2 Core/Shell Structure As Light Scattering Material for Highly Efficient Dye-Sensitized Solar Cells.
Online since: February 2012
Authors: Li Hua
Future technological development will focus on nano and its below structures, which will be a technological revolution and industrial revolution.
Comprehensive studies on its nature with cross-scientific theories such as physics, chemistry, material and electronics will vigorously promote its application in machinery, materials, electronics, energy and other areas.
Diamond films are generally of a polycrystalline structure.
So far, domestic and international researches on nano-crystalline diamond films have focused on nucleation mechanism, structure characterization and property analysis, instead of deposition technologies and efficiency, film thickness and area, and film quality.
Online since: March 2012
Authors: Justyna Strankowska, Michał Strankowski, Łukasz Piszczyk, Józef Haponiuk, Jerzy Kwela
Methods The intercalation/exfoliation structures of clay were studied by wide-angle X-ray diffraction using a X’Pert Philips diffractometer (source radiation: CuKa1, λ = 0.1546 nm, 40 kV, 30 mA) in the 0.5-10° (2q range) and at scanning rate 0.25°C×s-1.
This suggests that the clay has not been efficiently exfoliated in these systems resulting in a microcomposite structure associated with lower values of the maximum stress obtained in the tensile test experiments.
Parameter K is a constant related to the structure of the network, and the exponent n is related to the type of diffusion, being Fickian for n values of 0.45-0.50 (rate of diffusion of solvent is less than polymer segmental mobility), whereas 0.50J. of Chemistry Vol. 21 (1997), p.151 [10] E.
Online since: July 2006
Authors: Warren J. Poole, B. Raeisinia
The chemistry of the alloy in weight percent was 0.8 Mg, 0.6 Si, 0.7 Cu, 0.25 Fe, and 0.2 Mn.
This effect can be seen in the current example where transmission electron microscopy studies on solution treated and 1-day naturally aged samples peak aged at 250 °C (corresponding to the inflection point on the resistivity curve of Fig. 1b) reveal a finer precipitate structure for the naturally aged material (see Fig. 2 [9]).
Bright field TEM images illustrating the precipitate structure for material (a) peak aged for 30 minutes at 250 °C directly after the solution treatment and (b) peak aged for 5 minutes at 250 °C after solution treatment and 1 day of natural ageing.
Note the much coarser structure for the material aged at 250 °C directly after solution treatment [9].
Online since: June 2010
Authors: Chong Yun Park, Sabita Shrestha
Email:a shresthasabita@hotmail.com, bcypark@skku.edu #Present address: Central Dept. of Chemistry Tribhuvan University, Kathmandu, Nepal.
The presence of expected titania nanoparticles in the adduct structure was confirmed by their EDS spectra [Fig. 1(e)] and by XPS (discussed later) also.
The G band corresponding to the graphitic structure was obtained at 1580 cm -1 (pristine-), 1585 cm-1(Oxidized-) and 1581 cm-1 (TiO2-MWCNTs).
It provides information on the various carbon structures in the sample due to differences in their decomposition temperatures.
Online since: January 2013
Authors: Hong Zhong Zhang, Feng Dong, Xiang Yu Wang, Chang Ming Ye, Yan Qin Yang, Li Li, Xi Long Hao, Ming Hua Wang
Rapid Synthesis of Non-crosslinked and Monodisperse Polystyrene Microspheres Changming Ye1,2,a, Yanqin Yang2,b, Feng Dong2,c, Li Li 2,d, Xilong Hao2,e, Minghua Wang2,f, Xiangyu Wang1,g, and Hongzhong Zhang2,h,* 1Department of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China 2Zhengzhou University of Light Industry, Zhengzhou, Henan 450002, China ayechangming@zzuli.edu.cn, byangyanqin2002@163.com, cdongfeng526@126.com, dlili-00006@163.com, ehaoxilong886563@163.com, exiangyuwang@zzu.edu.cn, hzhz@zzuli.edu.cn Keywords: Polystyrene microspheres, Polymer synthesis, Fenton reagent, Structural Abstract.
In addition, because of the reasons as mentioned above, the materials or films with highly ordered meso-microporous structures using PS microspheres as templates have not been produced yet.
During the nucleation period, the stabilizer chains form a structure that acts as a skeleton for the PS particle growth [14].
Under the condition of weak acid (pH=3~4), styrene molecules with positive charge are easy to be caught by the negative ions of SDS to form the structure of nucleus-shell, which spherical “micro-reactor” with SDS chains as “shell” and styrene molecules as “nuclei”.
Online since: December 2003
Authors: Larry L. Hench, R.S. Pryce
Textural characterisation using nitrogen sorption revealed that the surface modified gel-glasses retain the mesoporous structure, but with a reduced surface area, pore diameter and pore volume as APTS concentration increases.
The mesoporous nature of the sol-gel structure enables the incorporation of specific stimuli into the glass for delivery at the local site of implantation [1,2].
West: Life Chemistry Reports Vol. 13 (1996) p.187 [2] M.M.
Brozek et al: Journal of Molecular Structure.
Online since: January 2013
Authors: Javier Fernández, Antonio Isalgué, Nuria Cinca, S. Sampath
Splashing is also strongly affected by substrate temperature resulting in quite significant changes of morphologies; substrate temperature affects [16] splat morphology through the change in interface nature, surface chemistry, solidification behavior, wetting and contact of molten droplet with substrate, droplet/substrate mechanical interaction; by spraying under vacuum conditions, the absence of surface oxidation is assumed to reduce splat viscosity and splat-substrate internal friction, therefore producing better spreading of a VPS splat [16].
[13] N Cinca, A Isalgué, J Fernández, J M Guilemany, Structure characterization and wear performance of NiTi thermal sprayed coatings, Smart Materials and Structures 19:8 (2010) 9pp
Study of the structure-properties relationship of Fe-Al, Nb-Al and Ni-Ti intermetallic coatings obtained by Thermal Spray Technologies, Dissertation (2008)
Online since: August 2014
Authors: Zhi Hua Wang, Hui Ru Tang, Ming Ke Shen, Zhen Yu Huang, Jun Hu Zhou, Ke Fa Cen
In addition, the fixed carbon content, calorific and carbon content of the modified coal increase with the increasing of microwave power, makeing the structure more compact.
Conclusions (1) Microwave is an effective method in lignite dehydration, the efficiency of which can reach 70% ~ 80%, and the selective heating mode causes the destruction and reforming of coal structure making lignite coal promotion.
L., et al, A review on water in low rank coals: The existence, interaction with coal structure and effects on coal utilization.
Microwave Chemistry [M].