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Online since: June 2011
Authors: Nurşen Saklakoğlu, Şefika Kasman, S. Gencalp
For cooling slope casting (CS casting), A380 aluminum alloy (Table 1) was melted in a graphite crucible in a resistance furnace and cast into a steel mould (30 mm in diameter and 160 mm in length), via a water cooled slope feed (see Fig. 1).
The semi-solid slurries were quenched in water to observe the microstructure of the semi-solid slurries and they were metallographically examined.
In addition, the solid fraction and sphericity were obtained using the CLEMEX PROFESSIONAL EDITION analysis program.
Online since: December 2010
Authors: Jian Qing Wang, Jie Meng, Cheng Sun, Wen Shun Sun, Xiao Xiu Hao, Xin Ni Mu
Synthesis and Application of Europium-Doped Complexes in Fluorescence Falsification-Resistant Ink Meng Jie1,2,a, Sun Cheng2, Wang Jianqing1, Sun Wenshun2, Hao Xiaoxiu2, Mu Xinni2 1The Faculty of Packaging and Printing Engineering, Tianjin University of Science & Technology, China. 2The Printing Engineering Department, Tianjin Professional University, China.
WH7401-50B type electric mixer; Heating temperature water-bath; Electronic analysis balance; Scraper fineness; The fluidity apparatus; NDJ-79 rotary viscometer; vario EL elemental analyzer type; VISTA-MPX inductively coupled plasma emission spectrometer; BRUKER TENSOR 27 Fourier infrared spectroscopes; RF-5301 fluorescence spectrophotometer.
POA and Phen were dissolved in absolute ethyl alcohol, adjusted the pH value to 6, then joined Eucl3 peroxide solution with stirring, added proper catalyst, maintained the temperature at 80℃, stirred unceasingly, after separated out sediment, continued to stir 2~3h, then cooled to the room temperature, followed by filtration and wathing with distinction water and 95% ethyl alcohol , then dried to get series doped products.
Online since: January 2014
Authors: Yong Liao, Fen Bao
Tab. 1 Evaluation criteria system of airport site selection operation conditions(C1) Clearance condition The airspace condition meteorological condition execution conditions(C2) Engineering and hydrogeological condition Landform and topography building materials Operation supports(C3) aviation oil supply Public Facilities(water ,electric ,gas and so on ) Access transport Social and economic conditions(C4) per capita GDP the quantity of population industrial development level Operation conditions are related to the aircraft operation, including clearance conditions, airspace condition, and meteorological condition.
Operation supports provide logistics services for the daily operation of the airport, more important aspects are aviation oil supply, public facilities (water, electric, gas and so on), access transport and so on.
Because influence factors of the airport site are very much, involving a lot of professional knowledge, experts in the committee should cover every subject field concerned.
Online since: February 2013
Authors: Hui Chen, Ning Xia, Zhi Min Zhu
The water vapor partial pressure of the steel surface increased why the delayed cracks occurred, preheat and controling the temperature of layer can suppress effectively the delayed cracks.
Under certain temperature conditions, the more is environmental humidity, the higher is diffusible hydrogen content in the deposited metal, which is significantly increased with the partial pressure of water vapor in the air.
Chinese Academy of Sciences, Shanghai Institute of Metallurgy, Materials Physics and Chemistry (Professional) PhD thesis, 2000.
Online since: May 2012
Authors: Han Mo Tan, Guo Hong Dai, Zi Qiang Zhou
The landfill of the ELVs will cause a lot of environmental problem such as soil pollution, water pollution and air pollution.
By the way, the water and rail is suitable method for the ELVs transportation because of its economy.
At the professional remanufacturing factories, the qualities and the cost can all be controlled according to the criterion.
Online since: April 2013
Authors: Jazair Yahya Wira, Samion Syahrullail, W.N. Fawwaz, Wan Nik Wan Mohd Norsani
The production and use of non-toxic, biodegradable lubricants has become a major issue, especially when the lubricant involved will come into contact with soil, crops or ground water.
Biodegradability is the ability of a substance to be decomposed by the action of bacteria into CO2, water and mineral compounds.
[3] A.R.Lansdown, Lubrication and Lubricant Selection, Professional Engineering Publishing Limited, United Kingdom, 2004
Online since: August 2012
Authors: Ya Jun Wu, Dong Xu, Xue Ying Wang
In general, direct benefit type and attached sun room type in operability are relatively simple, are easy to be accepted by the farmers, the construction can be completed, but also easy to achieve the effect, but to collector-storage wall, relative technical content higher, the farmer is difficult to independently accomplish, to professional and technical personnel in the guidance in order to meet the requirement, is not conducive to popularization.
In order to reduce the influence of window wall, window section form of slight changes, in order to increase the amount of sunlight incidence.As shown in Figure 4, the windows in the plane and profile do wipe angle processing, in the same window area under the premise of improving the rate of sunshine projection.But in the window profile on the plastering angle, should pay attention to the water treatment, lest it should rain, rain Shun wipe corner windows or into the indoor pollution.
Summary Solar energy as a low-cost non-polluting renewable energy, applied in cold regions of rural residential buildings in winter heating and domestic hot water has better social benefit and economic benefit.Both the improvement of the living environment of rural residents, improve life quality, but also save the energy, reduce the pollution of the environment.At the same time, alleviate the state of insecurity of the sources of energy, applied perspective is wider.This paper mainly cold rural passive solar heating application of the relevant analysis, use of passive solar house to absorb solar energy, this is the most simple one way.Because of its simple structure, low cost, more suitable for development in rural areas of application, development prospect.
Online since: August 2006
Authors: B.S. Jun, Gary L. Messing, Sang Jin Lee
In the combustion method, an oxidizer such as metal nitrates is mixed with a fuel such as amides, hydrazides carboxylates, etc. in a solvent, commonly water, and upon heating at low temperature range from 60°C to 500°C, the products of decomposition from the oxidizer and fuel mixture are ignited spontaneously to produce temperatures up to 2,000°C [1,2].
Inc., USA) as an oxidizer and carbohydrazide (CH6N4O, 97%, Acros Organics, New Jersey, USA) as a fuel with the mole ratio of 1:1.875 in distilled water The ChemSage thermodynamic program (Version 4.1, GTT's Technical Thermochemistry) was used to calculate the equilibrium species-formed from the oxidizer and the fuel during heating.
London New York Blackie Academic & Professional [13] Reist P C 1993 Aerosol Science and Technology 2nd Ed.
Online since: January 2013
Authors: Yong Xin Gao, Yang Yang
As in a State of crisis events and psychological imbalances in parties or groups (and are closely related to their populations) to provide timely, professional psychological assistance is the psychological crisis intervention. 2Mining analysis of the psychological trauma of the parties Wang Jialing mine, for example, understand the psychological path of survivors, analysis of mining party psychological trauma.
On top of some miners hanging in the hole by the permeable to escape the rising water, in self rescue miners rescued due to physical factors such as watched in the refuge worker deaths from falling into the water.
Online since: August 2014
Authors: Ya Chong Liu, An Kang Hu, Chun Hui Wang, Feng Lei Han
The method of the determination of design wave system 1.1 Summary of the loading procedures Applicable cargo loading conditions specified for fatigue calculations are analyzed through: a) The computation of the characteristics of the finite element model with still water loads b) The selection of the load cases which are critical for the strength of the resistant structural members The determination of the design wave characteristics for each load case includes the following steps: a) Computation of the Response Amplitude Operators and phase of the dominant load effect b) Selection of the wave length and heading c) Determination of the wave phase, so as the dominant load effect reaches its maximum d) Computation of the wave amplitude corresponding to the design value of the dominant load effect. 1.2 The design values of long-term predict The wave load prediction can be divided into short-term and long-term prediction.
Calculation of Wave Loads for fatigue assessment 2.1 Finite element model 9200TEU large scale container ship’s fatigue strength assessment finite element model is built entirely in accordance with the relevant professional design drawings, and the processing and analysis operations is completed by commercial finite element software MSC/PATRAN and NASTRAN.
[6] Yoshimi Goda, Design wave height selection in intermediate-depth waters, Coastal Engineering, Volume 66, August 2012, Pages 3-7
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