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Online since: May 2012
Authors: Lian Wang, Guang Yi Zhao, Man Zhang, Jian Qiang Lv, Yu Jun Hu, Kang Le Tian
And throughout the vast rural area and low prices of straw should be used as the ideal substitute resource Straw biogas process Through continuous exploration and research, at present, a representative of straw biogas production technology process is as follows : Straw crushing (original short 5 centimeters) → water wetting → plus straw fermentation wetting agents, ammonium bicarbonate, water → composting pre-fermentation (to adjust the PH value) → observe the growth of mycelium →bagging →into the pool→ plus inoculum (methane-producing bacterium, or liquid residue of biogas, various sludge, ammonium bicarbonate) →mixed with water →tank lid seal start (deflated) → use [3].
Straw unified gas engineering services Biogas plants for straw need professional centralized management, unified service, strengthen the straw gas service property management station construction, property management station to configure the transport machinery, mechanical access to materials, maintenance tools, and security detection equipment and other specialized equipment, training of professional staff and centralized gas users to conduct straw supply of raw materials, access to materials services, maintenance and safety checks, etc., so that straw biogas production process management standardization, to improve the effectiveness of straw gas use, quality and safety.
Online since: August 2013
Authors: Xin Wang, Li Jing Zhang, Xiao Yong Liu
The items of the research include the geological environment and subsurface water, adjacent buildings, around roads, underground pipeline and burying objects, water depth, flow velocity, sea level, weather of adjacent river, lake and coast, the environment, available construction site, etc.
The result of site investigation should be reviewed to identify the potential hazardous factors of construction environment by the security professionals, designers and construction crew.
Such as the water-caisson construction of Taizhou Bridge which was opened in 2012, its process flow was not worked out blindly.
Online since: March 2023
Authors: Guan Cheng Jiang, Li Li Yang, Xing Xing Wang, Guo Shuai Wang, Yin Bo He, Xiao Ya Wu
Due to the disintegration of the hydrate, the pore water pressure fluctuates and the formation water content increases once the drilling fluid enters the hydrate reservoir under the impact of temperature differences and filtrate.
Deionized water was provided by our laboratory equipment.
The filtration loss of water-based drilling fluid has a significant impact on wellbore stability, particularly in loose, fractured, or water-sensitive rocks.
In addition, the wellbore strengthener can help to reduce water-based drilling fluid losses.
Gulf professional publishing, 2011
Online since: April 2011
Authors: Qin Ma, Xian Wei Ma, Li Yang Yao, Yun Peng Hu
One was conventional TRLL that was used widely in traffic professional specifications of our country.
Water stability experimentation and analysis.
At present, water damage is the most common disease of asphalt pavement.
Marshall Test was adopted to evaluate resistance to water damage of asphalt mixture.
High Temperature Stability and Water Stability of Asphalt Mixture Modified by Polyester Fiber.
Online since: February 2012
Authors: Nicolae Alexandrescu, Constantin Udrea, Tudor Cătălin Apostolescu, Despina Duminică
Introduction Robotic cleaning systems, professional as well as personal, have had a promising development, due to the high number of possible applications and to the fact that they exempt humans of a tiring, repeated and often dangerous activity.
Different working conditions were generated: cleaning of dry surfaces, cleaning of watered surfaces and cleaning using window detergent solution.
The study performed on watered surfaces showed almost insignificant decrease of the cup performance, due to the fact that water was practically eliminated from the contact area during cup fixing.
Fig.6 (A) .Comparation among the maximum values of the detachment force: Fd – dry glass; FdUd – watered glass; FdDet – glass with detergent for window cleaning A similar test stand was developed for the study of cup fixing on vertical planes.
As previously, the research covered also the situation of fixing on watered glass.
Online since: February 2014
Authors: Shu Ce Zhang, Xue Heng Tao, Yong Liu, Xiao Meng Li, Xue Jun Wang, Jin Shi Lu
In condition of relatively independent environment in greenhouse relative to outside, air humidity will change unexpectedly during planting in view of temperature, illumination, rainy weather, incommutable air inside or outside greenhouse, metabolites produced by photosynthesis and respiration, evaporation of water in soil layer.
Humidity at the edge inside of the greenhouse is heavy, permate water outside and collection of water-drop over the roof are how result it.
In additon, the requirement of water for photosynthesis is constant obviously.
(3) Measuring soil humidity of crop areas whose tubers are in need of water and humdity on occasion
(Eds.), The Science of composting, Part 1, Blackie Acad. & Professional, pp. 23–29
Online since: February 2007
Authors: Yoon Suk Chang, Jae Boong Choi, J.C. Kim, Young Hwan Choi, Young Jin Kim, Sang Min Lee
Steam generators working in nuclear power plants convert water into steam from heat produced in the reactor core and each of them contains from 3,000 to 16,000 tubes.
Introduction Steam generators in pressurized water reactor (PWR) are heat exchangers that transfer heat from the primary reactor coolant system to the secondary-side feedwater to produce steam and each of them contains from 3,000 to 16,000 tubes.
However, integrity evaluation procedures are too complicated and hence only trained professionals are able to operate the system.
Online since: November 2015
Authors: Antonella Petrillo, Fabio de Felice, Federico Zomparelli
Despite railways being a statistically safe form of transportation (due to guidance per rails, professional drivers, etc.) rail accidents may still happen.
The systems considered in the analysis in the railway tunnel system are: 1) Telecommunications equipment; 2) Signaling system; 3) Systems of light and driving force; 4) Electric traction; 5) Water system – fire; 6) Ventilation; 7) Security system and 8) Supervision integrated.
Table 3: MTBF results Subsystem MTBF (h) Telecommunications equipment 1000 Signaling system 3600 System of Light and Driving Force 100 Electric traction 10000 Ventilation 1600 Water system – fire 4000 Security system 1200 Supervision integrated system 1400 The resulting values for MTTR and MDT for each subsystem and for the gallery system as a whole are shown in the following Table 4.
Table 4: MTTR e MDT results Subsystem MTTR (h) MDT (h) Telecommunications equipment 2.00 4.00 Signaling system 1.12 3.12 System of Light and Driving Force 0.51 2.51 Electric traction 2.17 4.17 Ventilation 1.55 3.55 Water system – fire 1.33 3.33 Security system 1.79 3.79 Supervision integrated system 0.53 2.53 The value of MTBF for the fault conditions of normal operation has been calculated by means of DBA, obtaining a MTBFC = 250.000 hours calculated by DBA.
Online since: July 2020
Authors: Wei Huang
Three dimensional digital image correlation method is to place two industrial cameras in front of the samples to be tested, adjust them at the same level with a professional tripod, and calculate the front and back coordinates of the points to be tested through the professional algorithm of the computer.
There are many ways to make the speckle pattern: water transfer printing, UV plate printing, painting, etc.
The change of strain field on the surface of the object to be tested is captured by professional industrial camera. 2.
Online since: May 2011
Authors: Hong Xia Yu, Ke Feng Xu
He acclaimed Qingdao in a letter to his friend, "Green mountains and water, blue sea and sky, top of China ".
To protect and develop the celebrities’ former residences by specialized scholars.The positive participation of scholars would ensure the protection without severe mistakes and avoid the unnecessary damages due to lack of professional knowledge of protection and utilization in government.
The protection process can not be simply defined as government action, and exclude the professionals from decision-making, but listen more to the experts in culture, history, architecture and other aspects to enable them truly devoted into the protection work.
Showing 1581 to 1590 of 3745 items