Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: November 2011
Authors: Li Qiang Chen
A professional company developed a "fully automatic system of environmental protection formula damping system," We hope these kinds systems are extended to printing field, to achieve reduction of environment pollution, stable print quality.
Different cities of the hardness of the water itself is not the same, those urban water impurities are different.
At China's water quality deteriorates are taught job at the northern countries, we learned normally are the northern hard water but southern soft water.
To purify the water first, then add chemicals to water quality exclusive to adjust to suitable for offset printing ink and water quality printing environment.
Purify water system.
Different cities of the hardness of the water itself is not the same, those urban water impurities are different.
At China's water quality deteriorates are taught job at the northern countries, we learned normally are the northern hard water but southern soft water.
To purify the water first, then add chemicals to water quality exclusive to adjust to suitable for offset printing ink and water quality printing environment.
Purify water system.
Online since: September 2018
Authors: Alexandra M. Vorobyeva
For example, the Renaissance regular parks in Italy, terraced on steep terrain and decorated with various architectural forms, water devices, stairs, grottoes and many decorative elements, were called "architectural gardens".
The basis of the artistic image of the park is the cross-shaped water channel.
In Kiev there was a water-parks diameter with a number of parks and embankments crossing the city along the floodplain of the river; in St.
At first, the acces to the water area of the impoundment was blocked for residents of the northern residential area by construction the water park "Osminozhek" on the axis of the green wedge.
The state policy of reviving public spaces and courtyards revealed the lack of professionals in the field of landscape design in the country.
The basis of the artistic image of the park is the cross-shaped water channel.
In Kiev there was a water-parks diameter with a number of parks and embankments crossing the city along the floodplain of the river; in St.
At first, the acces to the water area of the impoundment was blocked for residents of the northern residential area by construction the water park "Osminozhek" on the axis of the green wedge.
The state policy of reviving public spaces and courtyards revealed the lack of professionals in the field of landscape design in the country.
Online since: October 2012
Reviews were conducted by expert referees
to the professional and scientific standards.
This book covers the subject areas of hydrology and water resources, irrigation and water conservancy, water supply and drainage engineering, flood and drought management, hydraulic engineering construction, hydropower, hydraulics and hydraulic machinery.
Qiwei Han, China Institute of Water Resources and Hydropower Research, China; Changsha University of Science and Technology, China Academician.
This book covers the subject areas of hydrology and water resources, irrigation and water conservancy, water supply and drainage engineering, flood and drought management, hydraulic engineering construction, hydropower, hydraulics and hydraulic machinery.
Qiwei Han, China Institute of Water Resources and Hydropower Research, China; Changsha University of Science and Technology, China Academician.
Online since: June 2012
Authors: Chang Qing Fang, Shuan Fa Chen, Zeng Ping Zhang, Jian Zhong Pei
Introduction
Cyanate ester resins (CEs) attract much attention these days owing to their excellent properties, such as good mechanical properties, low water absorption, low outgassing and excellent dielectric properties [1].
The flexural strength is 170MPa and the modulus is 3.2GPa, with the water absorption being about 2%.
The cured specimens were removed from the mold and cut with a water coolant to required sizes: 35mm×10mm×2mm (type III).
Hamerton: Chemistry and Technology of Cyanate Ester Resins (Blackie Academic & Professional, Glasgow, London, 1994)
The flexural strength is 170MPa and the modulus is 3.2GPa, with the water absorption being about 2%.
The cured specimens were removed from the mold and cut with a water coolant to required sizes: 35mm×10mm×2mm (type III).
Hamerton: Chemistry and Technology of Cyanate Ester Resins (Blackie Academic & Professional, Glasgow, London, 1994)
Online since: December 2013
Authors: Ping Lv, Xia Li, Yan Guo Wang
Determination of pentachloronitrobenzene in Panax ginseng by HPLC
Li Xia1, a LV Ping1,b Wang Yanguo1,c,*
1Department of Biotechnological and Environmental Engineering, Tianjin Professional College, Tianjin 300410, China
a 13132120092@163.com , bbestman_0429@163.com, cyangguo_wang@163.com,
* Corresponding author
Keywords: HPLC, Panax ginseng, pentachloronitrobenzene.
It is also used to prevent the formation of slime in industrial waters.
(Shanghai, China) and distilled water, prepared from deionized water, was used throughout the study. 2 Sample preparation The whole herb of Panax ginseng was dried at room temperature, and then ground into fine powder (0.3 g) by a pulverizer, which was extracted with 10 ml 50% methanol (v/v) for 30 min in an ultrasonic bath at 25°C.
It is also used to prevent the formation of slime in industrial waters.
(Shanghai, China) and distilled water, prepared from deionized water, was used throughout the study. 2 Sample preparation The whole herb of Panax ginseng was dried at room temperature, and then ground into fine powder (0.3 g) by a pulverizer, which was extracted with 10 ml 50% methanol (v/v) for 30 min in an ultrasonic bath at 25°C.
Online since: July 2011
Authors: Jian Feng Zha, Bing Fang Liu, Guang Li Guo, Gang Wang
Mining Deformation Observation And Monitoring, The Discipline of Surface Movement And ‘Mining Under Buildings, Under Subways And Under Water.
The workers can also see the changing situations of the underground pressure, gas and water, which are closely associated with the process of mining on the screen clearly.
To Open Academies of Professional Higher Education For Mining Surveying.
To promote the development of mining surveying, facing the deepening education reform and widening absorbing students, it is necessary for academies of professional higher education to go to mining surveying and to absorb students from mines.
To open academies of professional higher education is one method for German to rise up mining surveying majors.
The workers can also see the changing situations of the underground pressure, gas and water, which are closely associated with the process of mining on the screen clearly.
To Open Academies of Professional Higher Education For Mining Surveying.
To promote the development of mining surveying, facing the deepening education reform and widening absorbing students, it is necessary for academies of professional higher education to go to mining surveying and to absorb students from mines.
To open academies of professional higher education is one method for German to rise up mining surveying majors.
Online since: May 2014
Authors: Xian Feng Pan, Wei Wu Cao
Along with the high-speed development of life information, the development of the computer simulation work is rapidly, so they have appeared in the development of a number of commercial fluid calculation software, and for commercial fluid calculation software was born make eased radiator design work.Next to the experiment and numerical simulation of the flow of the two aspects of heat transfer, the whole radiator and radiator units of local heat transfer simulation calculation.And open a window to 23 degrees outside air mass flow rate of 3.65 kg/s, for example, provide the chart of the simulation calculation steps below:
1.1 Simulation of the radiator pipe flow as a whole
For prototype radiator cooling water pipe thickness only 2 mm up and down, so there is no way to measure with instrument to its internal flows.SO we had to first conduct the water resistance of the radiator, and the simulation of internal flow characteristics.
To achieve the radiator cooling water pipe of the distribution of water flow, we need to build on the basis of the simulation of heat transfer units .
To simplify the processing, the prototype of the radiator think other methods of simple and convenient, the radiator shutters are scattered tropical simplified as porous media is the most commonly used of modern style.Here with the most professional fluid calculation software - CFDESIGN simulation calculation.This software has many functions will be of great help to the trial calculation, especially specialized test module of porous media simulation in this chapter.
The following figure 1-2 Figure 1-2 a Figure 1-2 b Figure 1-2 The whole simulation calculation results From the above diagram in figure 1-2 a gas lateral distribution of cooling air temperature, due to the cooling air flows through the radiator to forced convection heat transfer, this will lead to the overall rise in the temperature of the air, but will also take the cooling water pipe of heat.From figure 1-2 - b cooling water pipe temperature field distribution that the radiator cooling water pipe internal temperature distribution.This figure from the top to the bottom of tube in slowly lower water temperature, this is because the air forced convection heat transfer process, lead to reduce gradually, the water temperature of tube after heat exchange cooling air temperature rise step by step and take heat away.And the temperature of the cooling water pipe water fluctuation in the water temperature is higher than it.It has the following two reasons
: first, in the radiator pipe, the first drain pipe heat transfer effect is much better than the second row, and pipe cooling water temperature is low, the back tube instead of water temperature is high.To launch the overall water temperature rises because tube of water in water tank are mixed.Second, mainly because the prototype of the radiator and water tank is directly with engineering plastics, in the front of the engine is mainly have the effect of a fixed, so that the external air can't do with it directly forced convection heat dissipation.So it won't go to with the air heat transfer calculation, so the modeling calculation was also omitted the plastic shell.In accordance with the above figure 3-2 overall analysis, the result of the experiment and calculation results, it proves that the simulation calculation is correct.
To achieve the radiator cooling water pipe of the distribution of water flow, we need to build on the basis of the simulation of heat transfer units .
To simplify the processing, the prototype of the radiator think other methods of simple and convenient, the radiator shutters are scattered tropical simplified as porous media is the most commonly used of modern style.Here with the most professional fluid calculation software - CFDESIGN simulation calculation.This software has many functions will be of great help to the trial calculation, especially specialized test module of porous media simulation in this chapter.
The following figure 1-2 Figure 1-2 a Figure 1-2 b Figure 1-2 The whole simulation calculation results From the above diagram in figure 1-2 a gas lateral distribution of cooling air temperature, due to the cooling air flows through the radiator to forced convection heat transfer, this will lead to the overall rise in the temperature of the air, but will also take the cooling water pipe of heat.From figure 1-2 - b cooling water pipe temperature field distribution that the radiator cooling water pipe internal temperature distribution.This figure from the top to the bottom of tube in slowly lower water temperature, this is because the air forced convection heat transfer process, lead to reduce gradually, the water temperature of tube after heat exchange cooling air temperature rise step by step and take heat away.And the temperature of the cooling water pipe water fluctuation in the water temperature is higher than it.It has the following two reasons
: first, in the radiator pipe, the first drain pipe heat transfer effect is much better than the second row, and pipe cooling water temperature is low, the back tube instead of water temperature is high.To launch the overall water temperature rises because tube of water in water tank are mixed.Second, mainly because the prototype of the radiator and water tank is directly with engineering plastics, in the front of the engine is mainly have the effect of a fixed, so that the external air can't do with it directly forced convection heat dissipation.So it won't go to with the air heat transfer calculation, so the modeling calculation was also omitted the plastic shell.In accordance with the above figure 3-2 overall analysis, the result of the experiment and calculation results, it proves that the simulation calculation is correct.
Online since: March 2013
Authors: Feng Jiang Qin, Jie Dai, Min Zhao, Jin Di, Wen Ru Lu
., the dual-wall steel cofferdam is being widely applied to the deep water bridge foundation engineering [1].
Fig.1 Overall arrangement of dual-wall steel cofferdam (dimension unit: cm; elevation unit: m) Construction Technologies Steel was processed by professional steel structure manufacture, and assembled on site.
The second layer was symmetry assembled used the floating ability of the first layer, and sank by adding water.
Water concrete in blade angle was poured after cofferdam had been implantation.
When the height of pier was 4.5m, the water would be added to 56.74 m level.
Fig.1 Overall arrangement of dual-wall steel cofferdam (dimension unit: cm; elevation unit: m) Construction Technologies Steel was processed by professional steel structure manufacture, and assembled on site.
The second layer was symmetry assembled used the floating ability of the first layer, and sank by adding water.
Water concrete in blade angle was poured after cofferdam had been implantation.
When the height of pier was 4.5m, the water would be added to 56.74 m level.
Online since: November 2011
Authors: Dong Su Bi, Chao Nan Liu
It greatly consumes the dissolved oxygen in water body, brings eutrophication and inhibits from the wastewater biodegrading.
From this study, we wish to develop the new process of reuse the wastewater, this work is also highly important to conserve water resource, and then to alleviate the shortage of water resources.
The results showed that the effluent was in compliance with the water quality standard of GBT 18920-2002 for miscellaneous use.
References [1] Cheng Yi, Zhao Yiwen, The state of train laundry wastewater pollution and discharge, Environment and professional medical, Vol.8(4) (2002), p. 257-258 [2] Takada H , Ishiwatari R , Ogura N.
[3] Li Ling, Train laundry wastewater treatment and reuse engineering design, China water & wastewater, Vol.16(4)( 2000), p.34-36 [4]Chinese EPA: Water and Wastewater Monitoring Methods ( Chinese Environmental Science Publishing House, China 1997) [5] Chen Lie, Zhou Xingqiu, Wu jiandong, Harmfulness of surfactant wastewater and its treatment techniques, Industrial water treatment, Vol.23(10) (2003), p.12-16 [6] R.
From this study, we wish to develop the new process of reuse the wastewater, this work is also highly important to conserve water resource, and then to alleviate the shortage of water resources.
The results showed that the effluent was in compliance with the water quality standard of GBT 18920-2002 for miscellaneous use.
References [1] Cheng Yi, Zhao Yiwen, The state of train laundry wastewater pollution and discharge, Environment and professional medical, Vol.8(4) (2002), p. 257-258 [2] Takada H , Ishiwatari R , Ogura N.
[3] Li Ling, Train laundry wastewater treatment and reuse engineering design, China water & wastewater, Vol.16(4)( 2000), p.34-36 [4]Chinese EPA: Water and Wastewater Monitoring Methods ( Chinese Environmental Science Publishing House, China 1997) [5] Chen Lie, Zhou Xingqiu, Wu jiandong, Harmfulness of surfactant wastewater and its treatment techniques, Industrial water treatment, Vol.23(10) (2003), p.12-16 [6] R.
Online since: September 2011
Authors: Yuan Bao Leng, Rui Wang, Yang Zhou
Using Finite Element Method (FEM) and professional software such as ANSYS, we can build the 3D model embankment to do conversion researching.
Table 1 The Characters of Typical Erosions Types of Erosion The Characters Hole, Weak structure Isolated, high resistivity Hole and Weak structure fill with water, Weak structure, small seepage Isolated, low resistivity Crack, Weak layer Outspread, high resistivity Interface of water, Crack fill with water, Rich water layer Outspread, low resistivity Wenner, Pole-Pole, Dipole-Dipole and Pole-Dipole are most widely used resistivity imaging arrays.
Table 1 The Characters of Typical Erosions Types of Erosion The Characters Hole, Weak structure Isolated, high resistivity Hole and Weak structure fill with water, Weak structure, small seepage Isolated, low resistivity Crack, Weak layer Outspread, high resistivity Interface of water, Crack fill with water, Rich water layer Outspread, low resistivity Wenner, Pole-Pole, Dipole-Dipole and Pole-Dipole are most widely used resistivity imaging arrays.