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Online since: May 2015
Authors: Djamil Benghida
It is known that adobe buildings are subjected to deterioation by weathering, especially by wind and moisture (either from excessive rain water, rinsing ground water or high humidity).
Basing myself on the study of Brown and Clifton [6], adobe is principally made of: clay: 10-15%, silt: 10-15%, sand: 70-80% and water: 25-30% [6].
Calcite is a carbonate mineral which not only reduces the extent of water absorption in bricks (porosity decrease), but also leads to plugged pores even the smaller ones due to precipiation.
It is also not easy to find experienced professionals mastering the adobe construction methods (architects, masons, etc.).
Conclusion Adobe bricks treated with ecological and low-cost composants followed by natural fibers is an effective solution for the water absorption and weathering, cycling of wetting and drying.
Basing myself on the study of Brown and Clifton [6], adobe is principally made of: clay: 10-15%, silt: 10-15%, sand: 70-80% and water: 25-30% [6].
Calcite is a carbonate mineral which not only reduces the extent of water absorption in bricks (porosity decrease), but also leads to plugged pores even the smaller ones due to precipiation.
It is also not easy to find experienced professionals mastering the adobe construction methods (architects, masons, etc.).
Conclusion Adobe bricks treated with ecological and low-cost composants followed by natural fibers is an effective solution for the water absorption and weathering, cycling of wetting and drying.
Online since: October 2012
Authors: Guo Zhen Zhang, Qian Wang, Fu Ping Wu
Tunnel Engineering and the water environment interactions
The Effects of Tunnel Engineering on Water Environment
The impact of tunnel construction on the water environment are both quantitative and qualitative.
The Effects of Water Environment on Tunnel Engineering Water environmental influence on tunnel construction is tunnel surge water leakage and water pressure.
Tunnel Water Ecological Technology in Arid and Semi-arid Regions Research on Tunnel Line Selection Based on Water Ecological Protection System: The climate, hydrology, water resources of tunnel site and water environmental factors affect on tunnel construction.
water environmental is also the most serious.
Thanks for civil engineering college in Lan Zhou JiaoTong University provides structural experiment center of Gansu Province Key Laboratory of the Ministry of railways, roads and bridges and Underground Engineering Key Laboratory, Lan Zhou JiaoTong University lab and other professional laboratory, for this project required subject intersection and concrete structure related research content to provide the solid technical equipment guarantee.
The Effects of Water Environment on Tunnel Engineering Water environmental influence on tunnel construction is tunnel surge water leakage and water pressure.
Tunnel Water Ecological Technology in Arid and Semi-arid Regions Research on Tunnel Line Selection Based on Water Ecological Protection System: The climate, hydrology, water resources of tunnel site and water environmental factors affect on tunnel construction.
water environmental is also the most serious.
Thanks for civil engineering college in Lan Zhou JiaoTong University provides structural experiment center of Gansu Province Key Laboratory of the Ministry of railways, roads and bridges and Underground Engineering Key Laboratory, Lan Zhou JiaoTong University lab and other professional laboratory, for this project required subject intersection and concrete structure related research content to provide the solid technical equipment guarantee.
Online since: October 2022
Authors: Dmitry Rudchenko, Vasyl Serdyuk, Natalia Dyuzhilova
The analytical agency for market research [1], which brings together professionals in global market information and includes 1,700 research groups from 81 countries, has presented a forecast on the growth of the AAC global market.
After heat treatment, crystalline water is removed, and an amorphous aluminum silicate is formed, which has the following formula: Al2O3·2SiO2.
They do not fester in water, and, in fact, are a thin component of concrete solid phase.
However, the value of the specific surface of the particles should be optimal, since its excessive growth leads to an increase in water consumption of the mixture.
In order to ensure low-density of D150 AAC its water-solid ratio grows up to 0.72, while water-solid ratio for D300-brand AAC is much lower and marks 0.61.
After heat treatment, crystalline water is removed, and an amorphous aluminum silicate is formed, which has the following formula: Al2O3·2SiO2.
They do not fester in water, and, in fact, are a thin component of concrete solid phase.
However, the value of the specific surface of the particles should be optimal, since its excessive growth leads to an increase in water consumption of the mixture.
In order to ensure low-density of D150 AAC its water-solid ratio grows up to 0.72, while water-solid ratio for D300-brand AAC is much lower and marks 0.61.
Online since: February 2012
Authors: Qing Jie Meng, Yi Qian Liu
(5) Energy efficiency poorly
Aiming at these shortages, a digital system of high integrated professional intelligent control and is designed in this paper.
In the condition of constant circulation water, adjust hot-water temperature with the change of outdoor temperature.
Figure 1 is steam and water exchange system diagram.
Executive control device The system adopt actuator as electric valve, reach the purpose of water temperature control.
Table 1, Data table of mesurement Outdoor temperature(-6~1℃) Second water supply temperature(℃) 16 16.5 17 17.5 18 18.5 19 Primary return water temperature(℃) 36 36.5 37.5 38 40 41 42 Y start initialization interface display master interface start 50ms timing is 50ms?
In the condition of constant circulation water, adjust hot-water temperature with the change of outdoor temperature.
Figure 1 is steam and water exchange system diagram.
Executive control device The system adopt actuator as electric valve, reach the purpose of water temperature control.
Table 1, Data table of mesurement Outdoor temperature(-6~1℃) Second water supply temperature(℃) 16 16.5 17 17.5 18 18.5 19 Primary return water temperature(℃) 36 36.5 37.5 38 40 41 42 Y start initialization interface display master interface start 50ms timing is 50ms?
Online since: February 2014
Authors: Yang Ji Wei, Li Li Yang, Ying Ping Liang, Jing Ming Li
The wine aged with oak chips is different from the wine aged in oak barrels in terms of cost, but mouth feel and aroma of two wines are similar, it is difficult to distinguish for non-professional customers.
The applicability of the E-nose analysis technology for wines and alternative potentials for professionals are discussed.
Fig. 1 Schematic representation of the electronic nose system of PEN3 The temperature of the water bath was maintained at (25 ± 1) °C.
Each sample was incubated for 15 minutes in the water bath; then, a 5mL aliquot of each sample was placed into a 20mL glass jar.
However, by head-space dehydration, the elimination of water from wine samples became possible and significant aroma differences appeared.
The applicability of the E-nose analysis technology for wines and alternative potentials for professionals are discussed.
Fig. 1 Schematic representation of the electronic nose system of PEN3 The temperature of the water bath was maintained at (25 ± 1) °C.
Each sample was incubated for 15 minutes in the water bath; then, a 5mL aliquot of each sample was placed into a 20mL glass jar.
However, by head-space dehydration, the elimination of water from wine samples became possible and significant aroma differences appeared.
Online since: July 2015
Authors: Qiang Xia, Ting Kang Xing, Rui Sun, Hong Zhang
Resveratrol has been intensively researched by health professionals in the past decades, the interest in resveratrol has increased due to several other pharmacological effects and properties, which include neuroprotection, anti-inflammatory effects, chemopreventive and antiaging properties, and its potential role in diabetes and obesity prevention [6].
However, resveratrol is chemical unstable and low water solubility, which keeps it from widely application.
At the same time, a certain amount of emulsifiers were dissolved in ultrapure water at the same temperature.
As a result of the smallest particle size, NLC-8 may possess the highest occlusion effect, which could reduce the corneum water losing and increase water content in the skin, leading to the disturbance of barrier function.
Dynamic surface tension and adsorption mechanisms of surfactants at the air-water interface.
However, resveratrol is chemical unstable and low water solubility, which keeps it from widely application.
At the same time, a certain amount of emulsifiers were dissolved in ultrapure water at the same temperature.
As a result of the smallest particle size, NLC-8 may possess the highest occlusion effect, which could reduce the corneum water losing and increase water content in the skin, leading to the disturbance of barrier function.
Dynamic surface tension and adsorption mechanisms of surfactants at the air-water interface.
Online since: March 2011
Authors: Zhao Zhong Zhou, Zhen Li, J.L. Yuan
According to the result of experimental we figured out the regressive equations about the percent contents of binder, water, formaldehyde, hydrochloric acid,vesicant with nominal hardness degree.
By using the experimental and polynomial regression methods, difference research the relationship between the hardness of the grinding wheel and bonder, water, formaldehyde, hydrochloric acid, vesicant, abrasive-bonder ratio and abrasive-water ratio.
According to professional practical experience, theory and references, regression method is reasonable and accurate[3].
Abrasive weight was fixed in 200g, binder, water, formaldehyde, hydrochloric acid,vesicant were variables.
Programming SOLuting, the regressive equations between hardness and binder, water, formaldehyde, hydrochloric acid,vesicant were figured out.
By using the experimental and polynomial regression methods, difference research the relationship between the hardness of the grinding wheel and bonder, water, formaldehyde, hydrochloric acid, vesicant, abrasive-bonder ratio and abrasive-water ratio.
According to professional practical experience, theory and references, regression method is reasonable and accurate[3].
Abrasive weight was fixed in 200g, binder, water, formaldehyde, hydrochloric acid,vesicant were variables.
Programming SOLuting, the regressive equations between hardness and binder, water, formaldehyde, hydrochloric acid,vesicant were figured out.
Online since: October 2013
Authors: Yan Yu
The use of solar thermal energy can produce solar water heaters, gas stoves and other solar energy solar heating equipment; can make use of solar energy photovoltaic photovoltaic power generation, but also produce solar cells, photovoltaic materials, etc.; photosynthetic energy can be simulated using the synthesis of organic compounds such as plant photosynthesis.
Wind energy is the solar radiation, the surface a lot of air temperature and water vapor content due to changes in flow generated by the kinetic energy.
Chinese solar energy resource potential, water heaters use mature technology, with economic and market competitiveness, so solar thermal utilization of renewable energy use, and even in the future energy supply can play an important role.
Problems of New Energy Industry Development Policy support and incentives is not enough.The current level of technology and policy environment conditions, in addition to hydropower and solar water heaters have the ability to participate in market competition, most of the development and utilization of renewable energy costs are high, coupled with scattered resources, small scale production is not continuous, etc., in the current under the rules of the market competitive, the need for policy support and incentives.
At present, new energy technology talent in short supply, especially of highly qualified professionals, at this stage very lack of qualified domestic talent, which also caused the new energy enterprises is fierce competition for talent, personnel mobility is relatively high.
Wind energy is the solar radiation, the surface a lot of air temperature and water vapor content due to changes in flow generated by the kinetic energy.
Chinese solar energy resource potential, water heaters use mature technology, with economic and market competitiveness, so solar thermal utilization of renewable energy use, and even in the future energy supply can play an important role.
Problems of New Energy Industry Development Policy support and incentives is not enough.The current level of technology and policy environment conditions, in addition to hydropower and solar water heaters have the ability to participate in market competition, most of the development and utilization of renewable energy costs are high, coupled with scattered resources, small scale production is not continuous, etc., in the current under the rules of the market competitive, the need for policy support and incentives.
At present, new energy technology talent in short supply, especially of highly qualified professionals, at this stage very lack of qualified domestic talent, which also caused the new energy enterprises is fierce competition for talent, personnel mobility is relatively high.
Online since: February 2014
Authors: Chuan Bao Wu, Xiang Hui Zeng
However, global water resource is becoming less and less, which is known as water scarcity crisis and has threatened economic development and civilization continuation.
Contrarily, the water quality of Poyang Lake is becoming worse and worse.
Professional design and establishment combining powerful propaganda, tourism industry of Poyang Lake holds promise of prosperity.Highly effective fine agriculture is also good selection.
Agricultural impacts on surface water and ground water can be minimized by applying advanced chemical and biological technology.
Summary Although Poyang Lake is currently one of the freshwater lakes with the best water quality in China, its water quality is facing serious threat.
Contrarily, the water quality of Poyang Lake is becoming worse and worse.
Professional design and establishment combining powerful propaganda, tourism industry of Poyang Lake holds promise of prosperity.Highly effective fine agriculture is also good selection.
Agricultural impacts on surface water and ground water can be minimized by applying advanced chemical and biological technology.
Summary Although Poyang Lake is currently one of the freshwater lakes with the best water quality in China, its water quality is facing serious threat.
Online since: May 2011
Authors: Meng Liu, Chun Yu Huang, Qun Ying Cheng
Therefore, the energy consumption in buildings will increase as the whole country goes[1], attracting great attention from relevant professionals and policy-makers.
In which, the power is the dominant carrier for HVAC, lighting, other services appliances; natural gas is mainly used for restaurant, hot water supply and winter heating and the oil is only for winter heating when the oil-fired boiler is adopted.
In which, the power is the dominant carrier for HVAC, lighting, other services appliances; natural gas is mainly used for restaurant, hot water supply and winter heating and the oil is only for winter heating when the oil-fired boiler is adopted.