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Online since: June 2013
Authors: Rui Lin Lin
Other professional have also added: (4) Elaboration: Build new concepts upon basics, keep adding details and combine everything into a solid idea. (5) Awareness: Can easily find shortcomings, needs, or unusual parts of an idea.
And for toilet design and manufacturing, the goals are being more water-saving and easy-to-clean [3].
In addition, there is a study indicating that 40~50% of household water is used for sanitary purposes.
That study tries to adopt the concept of ejector to create a pressure difference and clean filth inside toilets using the theory of siphoning to save water.
The main purpose may be that fluid can be ejected in high speed to create suction, resulting in better water-saving effects [8].
Online since: August 2013
Authors: Tong Liu, Ying Chuan Li, Hai Quan Zhong
When producing less gas or more water, however, the gas wells may move into the non-annular region of slug and churn [1].
However, they did not consider phase slippage and underestimate the pressure drop in high water-cut gas wells.
Table 1 Ranges of the gas well test data Parameter Range Data Points 312 Wellhead Pressure, MPa 0.79 to 30.14 Bottom Hole Pressure, MPa 5.54 to 43.63 Temperature, K 282.38 to 407.15 Gas Rate, 104m3/d 0.81 to 42.06 Liquid Rate, m3/d 0.05 to 216.8 Water Cut 0 to 1 Well Depth, m 1,242 to 4,200 Gas-Liquid Ratio, m3/ m3 445 to 112,860 Internal Tubing Diameter, mm 44.5 to 76.0 Gas Gravity 0.575 to 0.831 Water Gravity 1.01 to 1.09 Oil Gravity 0.714 to 0.818 Proportion of Flow Pattern (using the Ansari transition criteria) 68% Slug or Churn Flow, 32% Annular Flow Calculation of the Void Fraction.
Acknowledgments We thank the financial support for this research by the National Natural Science Foundation “Mechanism Study on Deliquification of Downhole Choke in Gas Well with Water (No. 51104125)”.
Wells: Gas Well Deliquification (Gulf Professional Publishing, USA 2008)
Online since: August 2013
Authors: Yao Li Zhang, Jing Chen, Jiong Zhang, Yue Wu
What is more, it demands that the operators should have high professional technique.
After grinding, take 10.0000g by the analytical balance (precision 0.0001g), distilled water was added in the ratio of 1:5 (W / V), initially stirred uniformly, and then placed on a magnetic stirrer and extracted 40min , and then centrifuged (4000rpm, 30min, 28N) to get supernatant.
First, 2.5mL of different concentrations of naphthol solution were added to tubes (1.2.2.1 (1) in the figure), followed with 0.5mL A liquid Vortex mixed and placed in a constant temperature of 30 ℃ water bath for 5 minutes, then use UV - visible spectrophotometer to measure absorbance values ​​(λ535nm).
After oscillation vortex, it was kept in a constant temperature of 30 ℃ water bath for 5min.
Plant Hydrolases rapid determination of organophosphate and carbamate pesticides in environmental water samples, Xiamen University (Natural Science), 2002, 41 (1): 75 to 78 [10] Chen Fan, Chen Huanlin.
Online since: September 2013
Authors: Chang Sheng Feng, Ke Jie Fu, Yun Feng, Qi Bei Bao, Li Sheng Yang, Song Zhang
Thus, a method for rapid detection of formaldehyde in textiles is developed, to reduce workload in formaldehyde detection, save test time and need no professional.
Fig.1 Reaction Principle of Formaldehyde and AHMT Experiment Instruments and reagents U-1800 UV-visible spectrophotometer (Japan Hitachi Ltd.); DK-8AD electroheat constant- temperature water tank (Shanghai Yiheng Technical Co., Ltd.); AB104-S electronic analytical balance (Switzerland/METTLER-TOLEDO); formaldehyde with purity of about 36% (AR, Eagle Chemical Reagent Co., Ltd., Zhejiang), which will be diluted into 1500 mg/kg formaldehyde standard working solution, with the accurate concentration calibrated with the iodometric method; (A liquid) sodium hydroxide: 5 mol/L; (B liquid) potassium periodate: 2%; (C liquid) AHMT: 1.0%;.
Experimental method Preparation of the formaldehyde standard color card: the formaldehyde standard solution is diluted to the concentration of 0.20mg/kg, 0.75mg/kg, 1.5mg/kg, 3.0mg/kg, equivalent to the formaldehyde content of 20mg/kg, 75mg/kg, 150mg/kg, 300mg/kg when 1g specimen extracted from 100ml water.
Extraction of formaldehyde from fabrics: put 1.0g fabric into the formaldehyde extraction flask, which will be added with 100ml deionized water of a certain temperature and shaken so that the fabric can be completed wetted.
The flask will be shaken for (60±5)min in the (40±2)°C water.
Online since: May 2013
Authors: Rafiqul A. Tarefder, Md Arifuzzaman
In the 1st type, water action weakens or damages the adhesion bonding within the asphalt binder.
In the 2nd type, asphalt binder peels off the aggregate surface due to water action.
A group of pavement professionals and researchers believes that antistripping agents are helpful to reduce moisture damage or stripping.
The SB has been widely used as a binder modifier, usually as dispersion in water (latex).
“Measurement of the Forces Between Gold Surfaces in Water by Atomic Force Microscopy.”
Online since: January 2015
Authors: Nikolay Dmitrievich Belyaev, Vladimir Valintinovich Lebedev, Anastasy Valerjevna Mishina, Igor Sergeevich Nudner, Konstantin Konstantinovich Semenov, Dmitry Igorevich Schemelinin
To generate tsunami-type waves, a special tank was placed in the area of water supply of the test rig.
During each experiment, measurements were performed of the wave parameters and the maximum velocity of the water flow.
After the wave passed the upstream platform face, the water level dropped sharply for some time.
Consequently, water pressure decreased for some time too.
EERI/FEMA NEHRP 2006 Professional Fellowship Report. 34 p
Online since: July 2019
Authors: José Luiz de Medeiros, Alexandre Mendonça Teixeira, Lara de Oliveira Arinelli, Ofélia de Queiroz Fernandes Araújo
Finally, THI-water stream from LLS goes to a small atmospheric distillation column producing THI-water at the top and fresh water (99.99%) as bottoms.
For such pressure of 80 bar, the hydrate formation temperature for this NG field with such composition was estimated by the professional simulator using CSM method as 18.9°C, thus justifying the need for hydrate inhibition, since the seabed temperature was defined as 5°C.
The cooling demand was supplied by cooling water circuit, which in turn comes from sea water [9].
Water is added in the SS feed at 3:1 ratio of water moles per mol THI.
Water is also added into LLS at 4:1 ratio of water moles per mol THI in HPS gas.
Online since: January 2019
Authors: Wei Min Mao, Z.K. Zheng, Peng Yu Yan
After that, the collective mold with slurry was rapidly placed in a water pool within 2~3 seconds to retain the slurry microstructure at high temperature as far as possible.
Fig.1 Schematic diagram of preparing semi-solid A390 aluminum alloy slurry though a serpentine channel (1) Melting stage (2) Pouring stage(3) Water quenching stage 1.
Cold water 7.
The area A and the perimeter P of every primary silicon grain on a photo were automatically measured by a professional image analysis software.
When the value of FS is closer to 1, it means the primary silicon grains approach a polyhedron to a larger extent. 3 Results and Discussion 3.1 Effect of pouring temperature on the size of primary silicon grains If Al-25%Si aluminum silicon alloy liquid at 762 ºC was directly poured into the collective mold and cooled to 712ºC, then the collective mold with the alloy melt was quickly put into the cold water, the microstructure of the solidified slurry is shown in Figure 2.
Online since: November 2006
Authors: Francisco Rolando Valenzuela-Díaz, Jo Dweck, John J. Sansalone, Frank K. Cartledge, Pedro M. Büchler, Carolina A. Pinto
The control specimens were prepared with a water/total dry material ratio of 0.6.
To allow minimum workability, the water/cement (w/c) ratio was different according to the quantity of waste used.
The dry material was mixed initially followed by addition of water and manual mixing until a homogeneous paste was formed.
Water Science Technology.
Blackie academic & professional, London, 1993
Online since: July 2011
Authors: Li Ying Wang, Qiu Shi Hao
Germany and some other developed countries in some building opened reconstruction of old housing professional colleges.
Renovation of existing building in the 1990 of the 20th century in Europe began to apply energy saving transformation of solar system, solar system replacing traditional heating and ventilation and hot water systems, repair and improve the ability of enclosure structure thermal insulation, glass balcony or forms of using solar energy to improve indoor thermal environment of solar wall, wall insulation and window replacement combined with reconstruction of traditional methods to reform the existing residential buildings.
And set up on the building exterior wall screeds on the outside vapor-proof layer, prevent insulation moisture or condensation water here.
If rain and condensation water entered has insulation structure, also can by improved structure measures for processing: a method is in poly benzene insulation Board and isolation steam layer Zhijian has must of gap, each layer lower set a level of Pan water, makes entered of rain or condensation water can smooth discharge insulation structure; another a method is used with bump slot of EPS Board, makes of and isolation steam layer bite and into a overall.
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