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Online since: April 2014
Authors: Ze Kun Yao, Yong Quan Ning, Hong Zhen Guo, Zhang Long Zhao, Yan Hui Liu
In these maps, the numbers against each contour represent the efficiency of power dissipation (η) as percent.
The contour number represents the efficiency of power dissipation η (%) Fig.2.
With the development of power dissipation maps and instability maps, the microstructure characterization (including the elements, phase composition and grain size, etc.) may will be involved in the maps in the future. 4.
The contour number represents the efficiency of power dissipation η (%) Fig.2.
With the development of power dissipation maps and instability maps, the microstructure characterization (including the elements, phase composition and grain size, etc.) may will be involved in the maps in the future. 4.
Online since: September 2013
Authors: Gai Fang Wang, Feng Feng Fan, Xi Tao Xing, Yong Wang
Recently, with the rapid development of the Internet of Things, there has been growing interest in providing fine-grained metering and control of living environments using low power devices, sensor networks, especially wireless sensor networks (WSNs) which consist of spatially distributed self-configurable sensors, become a fundamental layer of the Internet of Things and perfectly meet the requirement in various fields, such as intelligent agriculture, intelligent environmental protection, intelligent city, etc., especially working in some particular hostile environments.
Fig. 1 Structure of digital sensors The 64-bit serial number of laser ROM is set up for addressing digital sensors, so that achieving the purpose of mounting a plurality of digital sensors on the single bus [10].
The 64-bit laser ROM is organized as follows: The first 8 bits represent the product type, the next 48 bits imply the serial number of the sensor itself, and the last 8 bits are cyclic redundancy check (CRC) of the first 56 bits.
Fig. 1 Structure of digital sensors The 64-bit serial number of laser ROM is set up for addressing digital sensors, so that achieving the purpose of mounting a plurality of digital sensors on the single bus [10].
The 64-bit laser ROM is organized as follows: The first 8 bits represent the product type, the next 48 bits imply the serial number of the sensor itself, and the last 8 bits are cyclic redundancy check (CRC) of the first 56 bits.
Online since: December 2013
Authors: You Sheng Zhao, Xue Ling Du, Peng Fei Yang
After the founding of the People's Republic of China, China coal mining industry has experienced decades of development and accumulated a large number of employees directly related to coal mine.
The large population number naturally leads to the increasing consumption of energy and daily necessities.
Planting trees extensively is an effective way to absorb CO2, vegetation recovery and grain cultivation are also helpful to moderate the greenhouse gas effectively.
The large population number naturally leads to the increasing consumption of energy and daily necessities.
Planting trees extensively is an effective way to absorb CO2, vegetation recovery and grain cultivation are also helpful to moderate the greenhouse gas effectively.
Online since: May 2014
Authors: Markus Rettenmayr, Andrea Löffler
While the mushy zone is held in the temperature gradient, a number of processes that involve simultaneous melting and solidification occur as e.g.
After a given holding time, the samples are quenched by switching off the heating, sectioned longitudinally, ground with SiC paper (80-4000 grain) and polished with diamond spray (0.25 μm).
Some former liquid channels that after quenching mainly consist of θ-Al2Cu and η-Phase are visible throughout the mushy zone, their number per sample width increases towards higher temperatures.
After a given holding time, the samples are quenched by switching off the heating, sectioned longitudinally, ground with SiC paper (80-4000 grain) and polished with diamond spray (0.25 μm).
Some former liquid channels that after quenching mainly consist of θ-Al2Cu and η-Phase are visible throughout the mushy zone, their number per sample width increases towards higher temperatures.
Online since: August 2013
Authors: Alexandr Sergeevich Inozemtcev, Evgeniy Valerjevich Korolev
A number of researchers [12...16] described the physical and chemical processes on the surface of the glass microspheres, and investigated the activity of aluminosilicate microspheres.
Tiny particles of silica surround each grain of cement.
The number of floors can be increased.
Tiny particles of silica surround each grain of cement.
The number of floors can be increased.
Online since: September 2013
Authors: Hui Fen Li, Guo Dong Chen
Introduction
People always focused on the effective use of sound economic transformation and expired deteriorative grain edible oil.
Tab.2 Technical parameters of test bio-diesel Fuels 0# pure diesel C10D90 C20D80 C30D70 Density (20℃)/ g·cm-3 0.8 0.814 0.828 0.842 Dynamic viscosity(40℃)/ mm2 ·s-1 5.45 6.11 6.258 6.855 Flashing temperature/ ℃ 78 83 88 94 Cetane number 51 50 49 48 Low heating value/ MJ ·kg-1 42.5 42 41.6 41 Cloud point/ ℃ 2 -15 -10 -10 Solidifying point/ ℃ -3 -18 -24 -21 Stable time(-10℃)(day) — 13 11 11 During the experiments, we founded that corn oil and diesel had good miscibility.
From the sixteen kinematic viscosity and cetane number could be seen, corn-diesel oil could be used as fuel in diesel engine.
Tab.2 Technical parameters of test bio-diesel Fuels 0# pure diesel C10D90 C20D80 C30D70 Density (20℃)/ g·cm-3 0.8 0.814 0.828 0.842 Dynamic viscosity(40℃)/ mm2 ·s-1 5.45 6.11 6.258 6.855 Flashing temperature/ ℃ 78 83 88 94 Cetane number 51 50 49 48 Low heating value/ MJ ·kg-1 42.5 42 41.6 41 Cloud point/ ℃ 2 -15 -10 -10 Solidifying point/ ℃ -3 -18 -24 -21 Stable time(-10℃)(day) — 13 11 11 During the experiments, we founded that corn oil and diesel had good miscibility.
From the sixteen kinematic viscosity and cetane number could be seen, corn-diesel oil could be used as fuel in diesel engine.
Online since: October 2015
Authors: Andrey N. Chibisov
where Ssur – the nanocrystal surface area; Etotnano – the nanocrystal total energy; NZr – the number of zirconium atoms (NO = 2NZr – the number of oxygen atoms); – the total energy of bulk zirconia (per ZrO2 molecule).
Rawn, Crystallite and Grain-Size-Dependent Phase Transformations in Yttria-Doped Zirconia, J.
Rawn, Crystallite and Grain-Size-Dependent Phase Transformations in Yttria-Doped Zirconia, J.
Online since: September 2011
Authors: Hui Min Hou, Jian Ling Fan
Introduction
In order to effectively address the Loess Plateau in Northwest China's drought and water shortage, drinking water problems, large areas of arable land suitable for long-term issues such as waste, to improve the lives of these areas, the ecological environment, prevent the desert southward, the state has in Gansu, Ningxia, Shaanxi and other regions the construction of a number of water and irrigation water, most of these projects play a huge economic, social and ecological benefits, and has become a drought in western China turn over the people in the region works and rich project, of which King Taechon electricity in Gansu Province to irrigation project (hereinafter referred to Jingdian project) and irrigation in Ningxia Guhai is a typical representative of [1].
Table 1 The analysis result of the groundwater quality [mg/L] Sampling locations Cl- SO42- Mg2+ Salinity Jingdian a second phase of the total dry ducts pumping station 1224.6 2527.6 127.8 5869 Second phase of the total dry Jingdian after four pumping stations and ducts 955.9 1029.7 76.4 3106 Second phase of the total dry Jingdian after five pumping stations and ducts 2101.9 1810.6 119.3 6280 Ningxia Guhai total of five pumping stations before the pools dry 889.8 921.6 79.8 2960 Ningxia Guhai 9 total dry pit pump stations after the tube 1896.7 2601.6 70.6 9516 The study showed that [2], as a result of hardening of cement hydration in the body there are a large number of unstable or meta-stable state of the material such as water and calcium aluminate, calcium hydroxide, when the erosion of media outside the SO42-, Cl-invasive cement plasma rock and role of these substances in the pores of cement in the local weak form partial double salt (ettringite, hydrated calcium aluminate, etc
When the humidity changes, the occurrence of grain size change with the expansion of concrete damage; for other reasons Concrete structures within the pore structure and porosity of the building is also an important anti-erosion factors, the general erosion of media through the pores and cracks within the concrete invasive.
Table 1 The analysis result of the groundwater quality [mg/L] Sampling locations Cl- SO42- Mg2+ Salinity Jingdian a second phase of the total dry ducts pumping station 1224.6 2527.6 127.8 5869 Second phase of the total dry Jingdian after four pumping stations and ducts 955.9 1029.7 76.4 3106 Second phase of the total dry Jingdian after five pumping stations and ducts 2101.9 1810.6 119.3 6280 Ningxia Guhai total of five pumping stations before the pools dry 889.8 921.6 79.8 2960 Ningxia Guhai 9 total dry pit pump stations after the tube 1896.7 2601.6 70.6 9516 The study showed that [2], as a result of hardening of cement hydration in the body there are a large number of unstable or meta-stable state of the material such as water and calcium aluminate, calcium hydroxide, when the erosion of media outside the SO42-, Cl-invasive cement plasma rock and role of these substances in the pores of cement in the local weak form partial double salt (ettringite, hydrated calcium aluminate, etc
When the humidity changes, the occurrence of grain size change with the expansion of concrete damage; for other reasons Concrete structures within the pore structure and porosity of the building is also an important anti-erosion factors, the general erosion of media through the pores and cracks within the concrete invasive.
Forging Process of Wrought Aluminum Alloy with Controlled Solid Fraction by Electromagnetic Stirring
Online since: July 2008
Authors: Chung Gil Kang, J.W. Bae, S.M. Lee
Table 1 Chemical compositions (wt %) and thermal characteristics of aluminum alloys (Al6061)
Zn Mg Cu Fe Si Mn Ti Al TL TS
0.03 0.98 0.30 0.15 0.62 0.03 0.01 Bal. 652°C 582°C
This study investigates microstructural change in terms of pouring temperature of aluminum
alloy melt, electric current of stirring, and stirring time and suggests optimum electromagnetic
stirring condition to control grain size of the molten alloys to forge the material in semi-solid state.
No. 1 2 3 4 7 Fig. 3 Photographs of indirection rheoforging samples 4 5 6 7 0 50 100 150 200 250 300 350 Strength (MPa) Number of experimental condition Fig. 4 Tensile strength of forged samples after T6 heat treatment Position ① YS UTS Position ② YS UTS The mechanical strength at position ① becomes similar to one at position ② at above 170 MPa of applied pressure which is obtained to be the minimum applied pressure to average the mechanical strength over the entire cross section of the sample.
No. 6 (a) (b) (c) (d) Fig. 5 Microstructure of indirect-type rheo-forged sample 0 50 100 150 200 250 300 350 12 11 10 9 Strength (MPa) Number of experimental condition 8 Fig. 6 Tensile strength of indirect-type rheo-forged samples after T6 heat treatment Position ① YS UTS Position ② YS UTS Position (a) with which the punch contacts showed most liquid was extruded and solid particles were compressed.
No. 1 2 3 4 7 Fig. 3 Photographs of indirection rheoforging samples 4 5 6 7 0 50 100 150 200 250 300 350 Strength (MPa) Number of experimental condition Fig. 4 Tensile strength of forged samples after T6 heat treatment Position ① YS UTS Position ② YS UTS The mechanical strength at position ① becomes similar to one at position ② at above 170 MPa of applied pressure which is obtained to be the minimum applied pressure to average the mechanical strength over the entire cross section of the sample.
No. 6 (a) (b) (c) (d) Fig. 5 Microstructure of indirect-type rheo-forged sample 0 50 100 150 200 250 300 350 12 11 10 9 Strength (MPa) Number of experimental condition 8 Fig. 6 Tensile strength of indirect-type rheo-forged samples after T6 heat treatment Position ① YS UTS Position ② YS UTS Position (a) with which the punch contacts showed most liquid was extruded and solid particles were compressed.
Online since: October 2007
Authors: Georg Peter Ostermeyer
This can be done by the modification of the form of abrasive grain -this controls the density and the
form of wear particles- and by introducing elastic belts, which controls the stability of the patch
growing process.
Input power Output power (Stick) slip resistance on contact patch Wear Temperature Wear debris / particle Number of contact patches Size of contact patches Friction boundary layer Friction power 2.
-P.: "On the dynamics of the friction coefficient" WEAR 254 (2003), 852-858 [OST.05] Ostermeyer, G.P., Müller, M.: "New developments of friction models in brake systems"; SAE Paper Number 2005-01-3942 Proceedings of the 23rd SAE Brake Colloquium and Exhibition, Orlando (2005), 187-200, also in SAE 2005 Transactions Journal of Passenger Cars - Mechanical Systems, 3078-3090 [OST.06a] Ostermeyer, G.
Input power Output power (Stick) slip resistance on contact patch Wear Temperature Wear debris / particle Number of contact patches Size of contact patches Friction boundary layer Friction power 2.
-P.: "On the dynamics of the friction coefficient" WEAR 254 (2003), 852-858 [OST.05] Ostermeyer, G.P., Müller, M.: "New developments of friction models in brake systems"; SAE Paper Number 2005-01-3942 Proceedings of the 23rd SAE Brake Colloquium and Exhibition, Orlando (2005), 187-200, also in SAE 2005 Transactions Journal of Passenger Cars - Mechanical Systems, 3078-3090 [OST.06a] Ostermeyer, G.