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Online since: January 2013
Authors: Zheng Zhong Zeng, Xiao Li Wang, Zhong Ren Nan, Hao Lei Guo, Hao Wang, Jian Feng Gou
The latest Chinese national standard of Standard for Pollution Control on the Landfill Site of Municipal Solid Waste GB16889-2008 [2] has more strict requirements than the previous one [3] on impermeable layer, as well as other professional standards such as CJJ17-2004 [4], CJJ113-2007 [5].
Materials: loess, weathered red soil, pure water, leachate.
Then we change the starting water level, measure and record the water head and time after the level stabilized.
Compaction curves 2: the clamp of water inlet 3: the variable head tube 4: water supplying bottle 5: the tube connected to source of water 6: the exhaust pipe 7: the discharge pipe Fig. 1.
In Chinese [11] The Ministry of Water Resources of the People’s Republic of China.
Online since: October 2013
Authors: Ting Yang, Dong Ping Luo, Bi Yun Luo
Some of the hydropower stations are not professional, and they do not have the qualification to exploit the hydraulic project.
Water is an important clean energy, so the first task for government is to follow “Renewable Energy Law” and “Water Law” to distinguish the responsibilities between the department of water exploitation and water management department, and define clearly series of rights, such as the plan of water resources, exploitation and management, attornment, examination, etc.
So far, other countries are going to the stage of water management instead of water exploitation.
There is no doubt that the whole world would reinforce the water management in 21st century which means that water would be used according to reasonable management.
[11] Li Jing, Li Du-shou, Jiang Bin: Water Right and Water Price-Study on Foreign Experience and Reform Direction in China.
Online since: August 2013
Authors: Qiu Ju Zhang, Bang Zhu Zhu
Enping hot spring resource (geothermal water) is rich.
Preliminary statistics indicate that the total flow of the geothermal water of Enping is 10,782 cm3/day.
The temperature of the hot water points are all 60℃ above, the highest one reaches to 87℃; Jiangmen belongs to subtropical low-latitude area.
The whole city has a coastline of 285 km, which is on the coastal continental shelf in water depth of 200 m of Jiangmen.
Give full play to the culture reputation of “overseas Chinese town” of Jiangmen, and develop cultural creative industries and tourist industry relying on advantages of the owning Kaiping Watchtowers,village world cultural heritage brand,abundant hot springs, coast, natural ecology, folk art, professional town innovation culture, and industrial culture.
Online since: March 2017
Authors: Andrei Florin Clitan, Mihai Liviu Dragomir, Nicolaie Pop
For the recycled complex (aggregates, bitumen, cement, water and fibers) the authors will use the generically denomination of matrix.
Reclaimed bituminous materials are having beyond the mineral skeleton, stabilization agents: lime ore cement and water to obtain a very good density of the final material.
Used materials are: - Natural aggregates: from the existing structure and extra ones; - Hydraulic binder: lime ore cement; - Bitumen binder: bitumen, bituminous emulsion and foamed bitumen; - Water.
The bitumen is added at 170–180°C and when it’s reach the water will expand, augment over eight times its volume, resulting the foamed bitumen.
Mirabdolazimi, Investigation of the effective parameters on the fatigue behaviour of HMA containing waste glass cullet, Professional and practical congress of hot mix asphalt, University of Science and Technology, Iran, (2008)
Online since: March 2017
Authors: Santina Di Salvo
In the process of preparation of architectural guidelines, it is essential to summarize the findings of the researchers, technologiest, designers, doctors and other related professionals working in particular environments and based on their incentives to specify requirements the architectural or technical design of the space for elederly people.
Components of this type include collectors, heat pumps and storage systems to generate hot water or to heat the rooms.
Online since: August 2012
Authors: Bing Yan
Especially the data collection is difficult, making model is complex, it will take a lot of time and energy of professional personnel, so the architector and user urgently need to build an easy evaluation tool.
(4)The green building evaluation system should consider several following aspects: (a)in the process of building constructing and using, the effective protection of the environment is mainly by adjusting the mode of using energy to reduce the pollution of air, land and water, and improve the quality of the environment; (b)Natural resources should be used carefully.
By providing durable and adjustable buildings, it choose the materials and products with good environment quality; it should advocate building repeat using and water conservation and reuse, etc.; (5)It should reduce the using of harmful substance, and provides high quality built environment and indoor environment, ensure the comfort degree and health degree of user; It should reduce the equipment system’s initial investment and long term operation cost; It should use the renewable resources and reduce the dependence of the non-renewable resources.
For example, if it does not firstly analyze the energy consumption, land, water, and materials, then it is impossible to evaluate the usage of resource.
Online since: September 2013
Authors: Gang Li
Basic knowledge of polymer materials With oil, coal, natural gas, water, air and salt as raw materials, the low molecular material monomer is prepared (such as ethylene, vinyl chloride, formaldehyde etc.).
(7)Good water and moisture resistance Most polymer hydrophobicity is very strong with good waterproof and moisture resistance.
The main disadvantages of polymer materials are: heat resistance and water resistance is poor, easy to age, low elastic modulus, and high price.
This data is recorded in some professional books, and here they are not discussed one by one.
Online since: September 2013
Authors: Yu Ping Zhao, Yu Hai Xu
Research on the 45Mn Materials Forging Properties ZHAO Yu-ping1, XU Yu-hai2 1ZHAO Yu-ping ,2XU Yu-hai, Ningxia Industry and Commerce Professional Technology College,Ningxia750021,China. 1Email:1048817108@qq.com 2Email: nxjdxyh@163.com Keywords: 45Mn, Forging performance, Microstructure, Microscopic analysis, Forging process Abstract In this paper, we study the 45Mn steel material forging performance, and the results show that: as long as choosing reasonable forging process parameters, such as the crack forging defects can be avoided.
After a solid solution treatment the performance of the steel had great changes. 1050 ℃ water after quenching get austenitic organization.
The water treatment in chrome toughness 45Mn steel most of solid soluble in austenitic.
Quench Heating 850 ℃, Heat Preservation 3 Hours, Cooling Medium: Water; Tempering Heating 530 ℃, Heat Preservation 3 Hours, Cooling Medium: Air.
Online since: January 2015
Authors: Zhong Jie Fan, Ming Dong Zang, Ji Wei Xu, Jia He, Jian Wei Qiao, Yi Liu
In recent years, international researches on centrifuge begin to evolve towards the professional direction.
Table 1 The division of historical development stages of centrifugal model test Stage Research Time Major project Country (Institution) The first stage Development of centrifugal model 1869 Development of theory France The second stage Establishment of centrifuge model and preliminary studies 1930-1960 Slope stability, Military use The US, Soviet Union The third stage Opening of equipment production, observation measurement 1960-1970 Geostatic stress problems, Stress problem of sharp drawdown of water surface Osaka City University, University of Cambridge The fourth stage Development of large centrifuge development, applications of computers and electronization 1970-1980 Diversification of simulation problems ( soil pore pressure, retaining wall earth pressure, excavation of deep foundation pit) University of Manchester, University of Cambridge, Japanese Gulf Research Institute The fifth stage Application of dynamic load, Seismic structure 1977-1991 Liquefaction, Earth-rockfill dam
During this period, China Institute of Water Resources and Hydropower Research produced a large-scale geotechnical centrifuge with the maximum acceleration rate of 300g and the capacity of 450g-t, which ranks fourth in the world [8]; Department of Hydraulic Engineering of Tsinghua University created a geotechnical centrifuge with the maximum acceleration rate of 250g and the capacity of 50g-t in 1993 [9].
Table 3 China's main centrifuges and their technical indicators Units Compl-etion time Effective radius (m) Maximum acceleration(g) Size of model (m) Maxim-um load(kg) Capac-ity(gt) Notes (model) CNAC 511 plant 1960 6.5 80 Power 145k WDC 800 140 Aircraft Industry The second ministry of machine building 1969 10.8 70 R0.98* 0.88 2000 140 Aircraft Industry The Fourth Institute of the Ninth Aviation Academy 1985 10.8 110 0.92,0.67,0.3 3000 330 National defence Nanjing Hydraulic Research Institute 1992 5.0 200 1.1,1.1, 1.1 2000 400 NS-400gt Yangtze River Scientific Research Institute 1985 3 300 1.1,0.33, 0.5 10000 180 Shanghai Railway Institute 1987 1.55 200 0.48,0.24,0.32 100 20 Model L-30 Sichuan University 1990 1.5 250 0.48,0.31,0.3 100 25 Chengdu University of Science 1991 1.54 250 0.6,0.4, 0.4 100 25 China Institute of Water Resources and Hydropower Research 1993 4 300 1.5,1.0, 1.5 1500 450 LXJ-4-450 Tsinghua University 1993 2 200 0.75,0.5, 0.6 Static force 250 50 TH-50gt 0.495,0.2,0.3
Online since: March 2013
Authors: Wu Di Zhang, Bin Yang, Fang Yin, Xing Ling Zhao, Jing Liu, Yu Bao Chen, Fa Gen Yang, Shi Qing Liu, Ling Xu
China 2Baoshan Medium Professional School, Baoshan 678000, P.
Temperature controlling system consists of temperature controlling instrument (1), water channel (3), electric heating tube (4), circulating pump (6), AC contactor (2) and thermocouple (5).
Design of experiment: fermentation model was batch and dilute concentration fermentation; fermentation temperature was 30 degrees Celsius; fermentation experiments were divided into the control group (120ml inoculum and water) and the experimental group (120ml inoculum, 15g SDR and water), the total volume of fermentation liquid was 400mL.
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