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Online since: January 2012
Authors: Ting Jun Li, Yu Da Shi, Nian Lai Zhou
Introduction In order to monitor the opening and closing state of a reservoir sluices remotely and automatically both at the on-the-spot scene and the remote dispatch center, set up a real-time sluice operating database, optimize the dispatching of these sluice and water resources, and run the whole project scientifically,safely,economically and efficiently, some computer, network, communication and control technologies are used comprehensively to collect and analyse the data of rainfall, water-level, flow-level, height of water gate, and the operating data of electrical equipments in this system.
f)The water-level data, controlling data can be sent to the management server database by the water-level gauge, which is linked to the collecting controls by means of RS485 interface communication. [1][6] g) Built-in GPS satellite positioning can determine the sluice’s geographic location and its accurate time correction.
Structure of the control system The monitoring of the upper-limit and lower-limit,the protection of under-voltage, over-current and over-voltage can be achieved by the professional hoist.
B.The structure of the water situation monitoring and forecasting system At present, because the sluice group is usually located at some rivers, reservoirs and river basin centers, the location of the building for the monitoring and forecasting system for the water situation thus become very meaningful and is also the important basis for sluice management.
Some equipments at rainfall-level station usually include water-level sensor, rainfall sensor units, data collecting system, GPRS data terminal unit, 4Ah solar backup battery and so on.
Online since: March 2016
Authors: Jian Liu, Jie Liu, Xing Long Leng, Fu Rong Qu
According to professional market organizations forecast report [1], OLED display and lighting market in 2019 will exceed $50 billion.
And the device package, the device isolated from the atmosphere of water vapor and oxygen in order to improve the device stability and working life, is very important [3].
In general, the polymer film is flexible, but its water and oxygen permeability is higher; metal films is limited to its application in the package due to conductive, opacity and other factors; and the inorganic insulating films such as SiO2, SiN and Al2O3 had very lower water oxygen permeation [4-9].
A comprehensive understanding on the alternating structure interface, alternating layers number of the structure on water and oxygen barrier properties is realized.
And interfacial characteristics have an important effect on water and oxygen barrier properties.
Online since: July 2017
Authors: Kássia Graciele dos Santos, Eduardo Santos Almeida, Vinícius Salgado Cardoso, Letícia Vieira Castejon, José Roberto Delalibera Finzer
An initial moisture analysis was carried out to determine the total amount of water and solids present in the commercial UHT milk.
In this work, it was used about 0.5 g lecithinated milk powder in 100 ml distilled water.
The test was performed in quadruplicate, establishing a maximum of 15 minutes after the samples fell into the water.
It was used 1 g of milk powder for 10 mL of distilled water.
(Blackie Academic & Professional 24th ed.
Online since: May 2014
Authors: Ren Xu
Many aspects of urban life along the canal is connected with the county's economic construction and social development, environment, transportation, water conservancy construction, therefore, the opportunity to promote the development of livable building will be a grand the complex system engineering for the counties along the canal, not only policy, technical, economic strength, and involve all aspects of a number of professional fields, the corresponding countermeasures must be taken into account in various areas.
Implementation of Integrated Water Environment.
In addition, the quality of a certain city in the territory of the Grand Canal waterfront landscape environment to a large extent depends on the water quality of governance of the canal, the canal water is only good governance, people have a hydrophilic possible.
In order to ensure ecological water needs of the canal dry season, we need to inject more recycled water in the river, and to purify the river water quality objective by improving the ecological environment.
Reclaimed water should come from the city's recycling plant, reducing the amount of water to maintain river landscape groundwater must be extracted.
Online since: August 2012
Authors: Xin Tong Lin, Ru Liang Pan, Xue Yi Zhou
Its process is that a professional group analyzes the hazard and operability problems leaded by the deviation from the designed process conditions through researching each unit (node analysis)[2].
The impact of the cooling water temperature.
The temperature of cylinder cooling water has a great influence on the wear and tear.
In general, when the cylinder cooling water temperature is too low, and cylinder wall temperature is below the dew point of H2SO4 , the low-temperature corrosion will be aggravated; when cylinder cooling water temperature is too high, the bad cooling effects will result in serious oxidation of emulsified oil, much carbon dirt, destructive film, and sticking abrasion.
Usually, the wear is small when the cooling water outlet temperature is controlled in the 85 ~ 95 ℃[7].
Online since: September 2013
Authors: Peng Fei Zhou, Xue Gao Chen, Yong Shu Zhu, Xing Chen, Long Xiang, Zhong Bo Yu
This paper gives a review on the study of related factors of non-point source pollution (NPS) in water cycle.
In fact, the plain area has small hypsography, well-developed water system and weak rainfall erosion.
Research of Soil and Water Conservation, 2006(05): p. 93-95+98
Journal of Soil and Water Conservation, 2004(03): p. 130-132
Water Saving Irrigation, 2011(11): p. 46-49+52
Online since: May 2013
Authors: Jan Válek, Jiří Bláha, Jitka Čechová, Michal Kloiber
That is why the repair of timber structures of the water fortress included also a reconstruction of the original ceiling system.
The top grey layer is formed from very gentle particles that could be removed by water – probably dirt.
The design of the reconstruction included specific recommendations for structural and chemical treatments and finally also professional consulting and continuous inspection of the process of the repair works.
A selection of timber suitable for the overall reconstruction as well as details demand experience and a careful and highly professional work.
Fresh coating should be wetted by water mist, typically 4 – 6 hours after application.
Online since: May 2012
Authors: Fa Hui Wang, Dan Zhang, Jun Yong Sang
Heat collecting pipes in a closed loop, containing water (with a little antifreeze) are used to extract this stored energy, which can then be used to provide space heating and domestic hot water.
Acknowledgements: This work was financially supported by the Fluid machinery and engineering provincial key subjects (507907), Thermal energy and power engineering characteristics professional(508057), The school Key subject(509927);Natural Science Foundation of He Nan Province Department of Education(2010B460011),He Nan Province Key  Research  Project (112102210105) .
Online since: July 2014
Authors: Guang Lin Gao, Ying Sun
It is important ecosystems on the planet, with stable ecological communities, wetlands in maintaining water, flood and waterlogging, conditioned air, biodiversity conservation has an irreplaceable role.
Water is an essential element of wetlands in urban wetland park planning should focus on taking into account the water pollution control, and water purification function, enhance self-purification ability of wetland so as to achieve the purpose of the water system to recover.
Water Environment Ecology Landscape Environment Figure 1 Water Wetland Ecological Design In Wetland Park is not only to the local ecological restoration, but also take into account the impact of the whole basin of local wetlands proposed recovery plan for the whole basin.
Most Tinglang built by the water ( Fig. 3 ) built of wood materials.
Landscape was given so many symbolic symbolic meaning, is viewed by the people and the impact of the way of thinking, because people saw the water gushing and nourishes all things, will have a feeling of charity.
Online since: June 2014
Authors: Xin Xin Liu, Wen Fa Xiao, Qiang Xiao
It can prevent liquid from flowing into the permeable formation so that the cement is able to keep a proper amount of water, which can ensure the safety of cementing job.
Water-based drilling muds with the addition of fluid loss additive to control fluid loss or improve inhibition often cause large changes in fluid rheology.
The fluid loss of fresh water cement slurry can be controlled about 50mL with 2% P1402.
Greek lignites as additives for controlling filtration properties of water- bentonite suspensions at high temperatures[J].
Oil Field Chemicals.Gulf Professional Publishing: Burlington, MA, 2003
Showing 1441 to 1450 of 3723 items