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Online since: July 2014
Authors: Ming Tong Ji, Chun Ying Zhang, Yu Dan Peng, Ting Ting Liu
Moreover, the cost of daily maintenance required is large and professionals are also required, which is not a small operation cost for travel operators.
They should choose environmental, green or ecological hotels with less energy consumption and form good habits of saving water and electricity.
They should choose environmental, green or ecological hotels with less energy consumption and form good habits of saving water and electricity.
Online since: November 2012
Authors: Melinda Godzsák, Zoltán Gácsi
In the first stage there is a 6-hour solid solution treatment at 530 ºC temperature and then the castings are intensively cooled down in water of 60-80 ºC temperature.
According to the professional literature [2] if the magnesium content of the alloy is solved it increases the value of lattice parameter.
Figure 8 illustrates G-P zones in different magnification rates. [4] Reading the professional literature we found photos where G-P zones can be seen more sharply but in these photos it is more difficult to see them in the matrix and their composition cannot be identified either. [5, 6] Figure 8: Photos of the Guinier-Preston zones Summary Our task was to find other heat treatment parameters to reduce the treatment periods and power consumption (530 ºC temperature - 6 hours and 210 ºC temperature – 3 hours).
According to the professional literature [2] if the magnesium content of the alloy is solved it increases the value of lattice parameter.
Figure 8 illustrates G-P zones in different magnification rates. [4] Reading the professional literature we found photos where G-P zones can be seen more sharply but in these photos it is more difficult to see them in the matrix and their composition cannot be identified either. [5, 6] Figure 8: Photos of the Guinier-Preston zones Summary Our task was to find other heat treatment parameters to reduce the treatment periods and power consumption (530 ºC temperature - 6 hours and 210 ºC temperature – 3 hours).
Online since: August 2013
Authors: Hong Liang Zhang, Bo He, Jing Hua Sha
SECRETARY
SPECIAL TRUSTEE FOR AMERICAN INDIANS
SOLICITOR
ASSISTANT SECRETARY(Policy, Management and Budget)
Interior Business Center
Chief Information Officer
INSPECTOR GENERAL
DEPUTY SECRETARY
ASSISTANT SECRETARY
(Fish and Wildlife and Parks)
ASSISTANT SECRETARY
(Indian Affairs)
ASSISTANT SECRETARY
(Land and Minerals Management)
ASSISTANT SECRETARY
(Water and Science)
National Park Service
Fish and Wildlife Service
Bureau of Indian Affairs
Bureau of Land
Management
Office of Surface Mining Reclamation & Enforcement
Bureau of Ocean Energy Management, Regulation & Enforcement
U.S.
It relies on the professional strength to provide reliable analysis to other institutions and markets.
On the other hand, industry associations respond to the industry specialized professional statistics as a basis, in consultation with the relevant government authorities to seek suitable for industrial development system space.
It relies on the professional strength to provide reliable analysis to other institutions and markets.
On the other hand, industry associations respond to the industry specialized professional statistics as a basis, in consultation with the relevant government authorities to seek suitable for industrial development system space.
Online since: September 2013
Authors: Wei Luo, Jia Qi Chen, Lian Heng Zhao, Pan Cheng
Study on Stability of Subgrade Slope along River Subjected to Water Level Fluctuation and Stream Erosion[J].
Quasi-static Analysis of Seismic Stability of Anchored Rock Slope under Surcharge and Water Pressure Conditions[J].
(In Chinese) [11] The Professional Standards Compilation Group of People’s Republic of China.
Beijing: China Water Power Press, 2007.
Improving on Assumption for Water Pressure Distributing on Failure Surface in Rock Slope[J].
Quasi-static Analysis of Seismic Stability of Anchored Rock Slope under Surcharge and Water Pressure Conditions[J].
(In Chinese) [11] The Professional Standards Compilation Group of People’s Republic of China.
Beijing: China Water Power Press, 2007.
Improving on Assumption for Water Pressure Distributing on Failure Surface in Rock Slope[J].
Online since: December 2014
Authors: Ronaldo Alves Medeiros, Maryangela Geimba Lima
Table 1: Dosages of the investigated specimens of concrete
Type of sample
Cement [kg]
Sand [kg]
Gravel [kg]
Water [kg]
1
420
588
882
168
2
420
588
882
210
3
420
588
882
252
A type of cement (CP V) commercially available in Brazil was used.
According to Table 1, it can be verified that three different types of concrete samples have been molded, the only difference between them was the quantity of water in concrete.
It has also been verified that the higher the amount of water in concrete is, the lower the electrical resistivity is too.
It is know that the higher the amount of water in concrete is, the higher its permeability also is [9].
Monteiro, Concrete: Microstructure, Properties and Materials, third ed., McGraw-Hill Professional, 2005.
According to Table 1, it can be verified that three different types of concrete samples have been molded, the only difference between them was the quantity of water in concrete.
It has also been verified that the higher the amount of water in concrete is, the lower the electrical resistivity is too.
It is know that the higher the amount of water in concrete is, the higher its permeability also is [9].
Monteiro, Concrete: Microstructure, Properties and Materials, third ed., McGraw-Hill Professional, 2005.
Online since: July 2020
Authors: Raid Salih Jawad, Alaa Hussein Younus, Hussein Hafidh Abbas, Ahmed Shihab, Aya R. Jawad, Nooruldeen Al Muski
Water. 11, 559 (2019) 1-20
Water Res. 44 (2010) 3147–3165
Ding, Nanotechnology for Environmental Decontamination; McGraw-Hill Professional: New York, NY, USA, 2011; ISBN 0-07-170279-2
Water Res. 100 (2016) 105–115
Water Res. 42 (2008) 4591–4602
Water Res. 44 (2010) 3147–3165
Ding, Nanotechnology for Environmental Decontamination; McGraw-Hill Professional: New York, NY, USA, 2011; ISBN 0-07-170279-2
Water Res. 100 (2016) 105–115
Water Res. 42 (2008) 4591–4602
Online since: November 2012
Authors: Jia Xi Duan, Xiao Jun Lv, Qi Dou Zhou, Zhi Yong Xie
Fig. 1 Finite element model and sketch of the cylinder
Table 1 Model scale and material property
Geometry [mm]
Material Property
Length
2000
Young’s Modulus
206000
[N/mm2]
Diameter
1600
Rib’s scale
10×50
Damping
0.06
Rib’s space
200
Density
7.85E-9
[N/mm3]
Base panel
375×200
Cover’s thickness
20
Poisson’s
Ratio
0.3
Cylinder’s thickness
6
Table 2 Time consumed by different mesh size
Mesh
2Ele(100mm)
4Ele(50mm)
8Ele(25mm)
Nodes
2328
9436
29558
Elements
2318
9353
29273
Time
20’
4 h
18 h 20’
Computer configuration
CPU:E5504@2.00GHz,
Memory:15.9GB,
OS: XP Professional x64
Table 3 Time consumed of fluid-structure interaction
Mesh
2Ele(100mm)
4Ele(50mm)
Nodes
3012
11704
Elements
3736
15332
Time
6’
247’
Verify of the vibration test.
Fig. 5 (A) and (B) show the comparison of mean square velocity (MSV) in vacuum and water.
The structure is 5 meters below the water level and the reflection of free surface is taken into consideration.
(A) In vacuum (B) In water Fig. 5 Comparison of MSV in vacuum and water Radiation SPL and radiation power.
(A) Radiation sound pressure (B) Radiation sound power Fig. 6 Radiation SPL and sound power level in water Fig. 7 Contour map of radiation SPL on 2ele(Left) and 4ele(right) at 520Hz Conclusions The steady sinusoidal and random white noise signals are employed as input for excitation force and the acceleration sensors are used to measure the response.
Fig. 5 (A) and (B) show the comparison of mean square velocity (MSV) in vacuum and water.
The structure is 5 meters below the water level and the reflection of free surface is taken into consideration.
(A) In vacuum (B) In water Fig. 5 Comparison of MSV in vacuum and water Radiation SPL and radiation power.
(A) Radiation sound pressure (B) Radiation sound power Fig. 6 Radiation SPL and sound power level in water Fig. 7 Contour map of radiation SPL on 2ele(Left) and 4ele(right) at 520Hz Conclusions The steady sinusoidal and random white noise signals are employed as input for excitation force and the acceleration sensors are used to measure the response.
Online since: January 2012
Authors: Dong Lin He, Wen Ye Gong
Building Roof Waterproof Application Of A New Material
Wenye Gong1, a, Donglin He2, b
1North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou, 450011, china
2KaiFeng University, Kaifeng, 475000, china
abaidsz@163.com, bkfuhdl@yahoo.com.cn
Keywords: roof waterproof, GT, application, base, construction
Abstract.
According to the test of professional departments, performances of GT materials are shown in Table 1 [2].
Table 1 GT performance index of flexible typeⅠ No. items Performance requirements Conditions Unit Technical index 1 Tensile strength MPa ≥ 2 2 Elongation percentage of breaking % ≥ 150 3 Adhesion stress MPa ≥ 1 4 Flexibility of low temperature No cracks ±5 ~ -10˚C, around Φ10 rods 5 Watertightness No leakage water pressure 0.3 MPa, 30 min 6 Resistance to freeze-thaw No cracking, blistering or shedding -20˚C ~ +20˚C, 20 cycles 7 Alkali resistance No cracking, blistering or shedding Immersed in Ca(OH)2 saturated solution for 14 d 8 Weather resistance No cracks, blistering, peeling, wrinkles or powder 600 W Xenon lamp weather instrument for 500 h 9 High temperature resistance No flowing, peeling or wrinkles 80˚C ± 2˚C, 5 h 10 Low temperature resistance No cracking or peeling -40˚C ± 2˚C 11 Drying time h Surface drying ≤ 4, actual drying ≤ 8 Base treatment to GT roof waterproof Before making roof waterproof layer, constructional base should be treated.
Water volume of roof gutter is concerned with diameter and amounts of the downspout.
The distance for rain water draining shall be no more than 30 m, and the water drop in gutter should not exceed 200 mm. 4.
According to the test of professional departments, performances of GT materials are shown in Table 1 [2].
Table 1 GT performance index of flexible typeⅠ No. items Performance requirements Conditions Unit Technical index 1 Tensile strength MPa ≥ 2 2 Elongation percentage of breaking % ≥ 150 3 Adhesion stress MPa ≥ 1 4 Flexibility of low temperature No cracks ±5 ~ -10˚C, around Φ10 rods 5 Watertightness No leakage water pressure 0.3 MPa, 30 min 6 Resistance to freeze-thaw No cracking, blistering or shedding -20˚C ~ +20˚C, 20 cycles 7 Alkali resistance No cracking, blistering or shedding Immersed in Ca(OH)2 saturated solution for 14 d 8 Weather resistance No cracks, blistering, peeling, wrinkles or powder 600 W Xenon lamp weather instrument for 500 h 9 High temperature resistance No flowing, peeling or wrinkles 80˚C ± 2˚C, 5 h 10 Low temperature resistance No cracking or peeling -40˚C ± 2˚C 11 Drying time h Surface drying ≤ 4, actual drying ≤ 8 Base treatment to GT roof waterproof Before making roof waterproof layer, constructional base should be treated.
Water volume of roof gutter is concerned with diameter and amounts of the downspout.
The distance for rain water draining shall be no more than 30 m, and the water drop in gutter should not exceed 200 mm. 4.
Online since: February 2013
Authors: Petr Baron, Stanislava Šoltésová
It denotes great interest not only in scientific sphere but also in sphere of results application in the new developing methods and their using in professional practice.
In traditional power stations is combination of steam turbine and alternator, where aggregates are transformed into heat and mechanic energy removed from heated water vapor.
In traditional power stations is combination of steam turbine and alternator, where aggregates are transformed into heat and mechanic energy removed from heated water vapor.