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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: February 2013
Authors: Ping Cao, Wei Zhao, Wei Hong Xia
Therefore, there’s a great need for professionals special in municipal solid waste treatment, which makes the course of Municipal Solid Waste Treatment necessary for undergraduate students majoring in Environmental Engineering.
Section three, pre-treatment of solid waste, includes compaction and palverizing used to reduce volume of the waste, sorting of MSW through wind, water or mesh.
Section three, pre-treatment of solid waste, includes compaction and palverizing used to reduce volume of the waste, sorting of MSW through wind, water or mesh.
Online since: February 2015
The topics that will be presented in this Volume will be going to the encounter of a variety of
scientific and engineering disciplines, such as chemical, civil, agricultural, mechanical engineering,
etc….The book is divided in several chapters that intend to be a resume of the current state of
knowledge for benefit of professional colleagues, scientists, students, practitioners, lecturers and
other interested parties to network.
Almeida Cruz and colleagues presents a theoretical and experimental study about water absorption in unsaturated polyester polymer composites reinforced with vegetable fibers, with particular reference to macambira fiber.
Almeida Cruz and colleagues presents a theoretical and experimental study about water absorption in unsaturated polyester polymer composites reinforced with vegetable fibers, with particular reference to macambira fiber.
Online since: August 2015
Authors: Khaled A. Abou-El-Hossein, Oluwole A. Olufayo
Today’s contact lens professionals must familiarise themselves with the various contact lens manufacturing methodologies that are capable of producing high accuracy optical products for their patients.
Based on the need for more biocompatibility, hydroxyethyl-metacrylate (HEMA) soft hydrogel contact lenses, known as water-loving polymers and possessing high gas permeability, were then introduced.
Nicolson and Vogt [2] showed that the evolution of contact lenses was driven by an increased understanding of the physiological needs of the cornea, beginning with the first hydrogel polymers developed by Wichterle, followed by a variety of high water hydrogels.
The attractiveness of these polymers from a medical standpoint relates to their ability to maintain high content of water as well as their better oxygen permeability.
On the other hand, machining of gas permeable polymers can be satisfactorily achieved as long as the polymer stock contains very little water.
Based on the need for more biocompatibility, hydroxyethyl-metacrylate (HEMA) soft hydrogel contact lenses, known as water-loving polymers and possessing high gas permeability, were then introduced.
Nicolson and Vogt [2] showed that the evolution of contact lenses was driven by an increased understanding of the physiological needs of the cornea, beginning with the first hydrogel polymers developed by Wichterle, followed by a variety of high water hydrogels.
The attractiveness of these polymers from a medical standpoint relates to their ability to maintain high content of water as well as their better oxygen permeability.
On the other hand, machining of gas permeable polymers can be satisfactorily achieved as long as the polymer stock contains very little water.
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: October 2014
Authors: Rui Feng Tao
Based on relevant national standards, able to draw on methods of building materials in the intensity measurement error detection site: randomly selected construction materials in a building point average layout, taken in connection centers and secondary materials as a center of reference line to get the perspective of other materials as well as the change fα radial change fR, using ultrasonic echo technique, the completion of testing, materials testing and strength of the parts described in Figure 2:
Fig. 2 Structural Mechanics Building analysis chart
Problems in construction materials testing
Although our building inspection agencies have developed more than 20 years, but professional quality inspectors and inspection capabilities have yet to be improved, construction materials testing equipment are more sophisticated, complex, which requires testing personnel have professional testing skills, extensive testing experience, a strong work ethic, but in the detection process of building
Based on Nonlinear Error Correction Smart Water Testing Instrument Computer Measurement & Control. 2011; 01,55-57
Based on Nonlinear Error Correction Smart Water Testing Instrument Computer Measurement & Control. 2011; 01,55-57
Online since: August 2016
Authors: João Carlos Silos Moraes, Alailson Domingos dos Santos, Michela Melissa Duarte Seixas Sostena, José Carlos Barbosa, Paulo Henrique dos Santos, Maria Giovanna Gandolfi, Carlo Prati
The setting time indicates the working time the professional has to carry out the clinical procedure.
It is currently widely used by professionals to seal the pathway between the root canal system and the external surface of the tooth.
Before filling, the samples were stored in 100 ml of 0.03% chlorexidine solution for 30 minutes, then immersed in deionized water for 10 min and dried with absorbent paper.
Each filled tube was sealed in a flask containing 10 mL of deionized water and stored at 37o C and RH between 95 and 100%.
After 24 h, the tubes were removed and placed in another flask with an equal amount of new deionized water.
It is currently widely used by professionals to seal the pathway between the root canal system and the external surface of the tooth.
Before filling, the samples were stored in 100 ml of 0.03% chlorexidine solution for 30 minutes, then immersed in deionized water for 10 min and dried with absorbent paper.
Each filled tube was sealed in a flask containing 10 mL of deionized water and stored at 37o C and RH between 95 and 100%.
After 24 h, the tubes were removed and placed in another flask with an equal amount of new deionized water.
Online since: December 2011
Authors: Qi Heng Wang
However, due to the complex of indoor pipeline facilities, the need for water, lack of fire eliminating pertinence, limited ability to intercept the fire, self-limited fire water; fire engines need to use supplies from the outdoors.
According to statistics, many domestic high-rise public buildings have set up refuge floors, but most of the refuge floors are generally combined with the equipment, fire water supply system and exhaust system zoning.
Following aspects should be considered for fire safety design of high-rise buildings: (1) The overall layout is reasonable and design idea is clear; (2) Division of evacuation stairwell and the fire district are rational; (3) All components of high-rise buildings should have adequate fire resistance limit; (4) The design of safe evacuation routes is reasonable; (5) Secure and stable linkage system should be used in the equipment of automatic fire alarm system and fire-extinguishing system: (6) Water design of high-rise building should be well done in case that there is sufficient volume of water when fire broke so as to play a role of non-fire retardant; (7)Non-combustible or flame retardant materials are used as much as possible for interior decoration to reduce the amount of combustible material, so as to improve safety index.
Any advanced fire-preventing facilities and equipments are operated by man, according to "the PRC Fire Law" requirements, fire control room operators need to be fixed and have to go through the professional training of fire prevention and obtain certificates before going on duty ; staff posts should properly grasp the performance of fire preventing facilities, using methods, general troubleshooting and other professional skills, as well as persist in doing routine maintenance, and timely discover and exclude insecure factors disturbing equipment operation
According to statistics, many domestic high-rise public buildings have set up refuge floors, but most of the refuge floors are generally combined with the equipment, fire water supply system and exhaust system zoning.
Following aspects should be considered for fire safety design of high-rise buildings: (1) The overall layout is reasonable and design idea is clear; (2) Division of evacuation stairwell and the fire district are rational; (3) All components of high-rise buildings should have adequate fire resistance limit; (4) The design of safe evacuation routes is reasonable; (5) Secure and stable linkage system should be used in the equipment of automatic fire alarm system and fire-extinguishing system: (6) Water design of high-rise building should be well done in case that there is sufficient volume of water when fire broke so as to play a role of non-fire retardant; (7)Non-combustible or flame retardant materials are used as much as possible for interior decoration to reduce the amount of combustible material, so as to improve safety index.
Any advanced fire-preventing facilities and equipments are operated by man, according to "the PRC Fire Law" requirements, fire control room operators need to be fixed and have to go through the professional training of fire prevention and obtain certificates before going on duty ; staff posts should properly grasp the performance of fire preventing facilities, using methods, general troubleshooting and other professional skills, as well as persist in doing routine maintenance, and timely discover and exclude insecure factors disturbing equipment operation
Online since: March 2011
Authors: Zhen Li, Zhao Zhong Zhou, 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 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.