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Online since: January 2012
Authors: Wei Bang Chen, Xue Mei Ding, Ying Ying Wan, Fei Que
It is well known that uniforms used for racing car drivers, firemen, steel workers and many related professionals must be fireproof.
He found that the TPP values increased, and the water vapor permeability decreased, after laundering.
The water vapor permeability and air permeability were mainly tested accordingly to the standard.
The water vapor permeability of the fabrics before and after laundering can be seen in Fig. 5.
Thus the effects of laundering on the water vapor permeability are too small to be of practical interest.
Online since: October 2012
Authors: Jin Long Zhou, Qiao Li, Chun Yan Bai, Yu Yuan Ji
Of 2191 drinking water projects, surface water projects numbered 122, and groundwater projects, 2069.
Population groups drinking grade Ⅰwater, grade Ⅱ water, grade Ⅲ water and unqualified water accounted for 33.08%, 14.21%, 17.13% and 35.58% of the total population, respectively.
That is to say, 64.42% of the total residents had access to safe and comparatively safe drinking water after water quality improvement (since the majority of the water in drinking water projects had not been disinfected, the improvement of qualified rate of drinking water was seriously affected).
In 504 drinking water projects in 42 counties (municipalities), fluoride content of water exceeded 1 mg/L, and in 195 drinking water projects in 32 counties (municipalities), fluoride content of water exceeded 1.5 mg/L.
Other problems include co-existence of multiple managerial modes, low professional skills of managerial staff and irregular repair & maintenance service.
Online since: July 2011
Authors: Peng Zhang, Xiao Hang Wei
Study on Flexural Strength and Flexural Modulus of Elasticity of Cement Stabilized Aggregate Peng Zhang1, a, Xiaohang Wei2, b 1College of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China 2China Road & Bridge Corporation, Beijing, 100011, China azhangpeng8002@163.com, bweixiaohang2002@163.com Keywords: Cement stabilized aggregate, Flexural strength, Flexural modulus of elasticity, Curing period, Cement content.
Introduction Compared with other semi-rigid base layer materials, cement stabilized aggregate has much more advantages, such as higher strength and rigidity, and more excellent wholeness and water stability.
The water to be mixed was local tap water.
Conf. of Chinese Logistics and Transportation Professionals – Logistics, China. (2008), p. 2479 [10] G.Z.
Online since: February 2013
Authors: Min Shu, Yi Yang Li, Xing Zhi Liao
How to improve training records and skill level, and try to minimize sports injury at the same time, has increasingly become the focus of Volleyball Professional Training Design.
To sum up, it is essential to acquire volleyball athlete foot omni-directional pressure information, which quantitatively reveals the foot biological mechanics characteristics and kinetics characteristics when the volleyball athlete is running, jumping, kicking etc., thus to provide a scientific basis for Volleyball Professional Training Design that is in order to improve the athlete’s training records and skill level and minimize sports injury.
Besides, PVDF film is light, flexible, extremely thin, impact-resistant, invulnerable to the pollution of water and chemicals, and easily made into any shape and area ranging from tablets or tube[4].
In order to improve the athlete’s training records and skill level, and at the same time try to minimize sports injury, Volleyball Professional Training Design must take the scientific theoretical basis for guidance, and precise data acquisition must be premised.
Using this method can accurately acquire the static and dynamic distribution information of the volleyball athlete’s foot pressure, thus to provide data support for the research of the foot biological mechanics characteristics and kinetics characteristics when the volleyball athlete is running, jumping, kicking etc., and to provide scientific theoretical basis for Volleyball Professional Training Design.
Online since: March 2012
Authors: Hong Mei Wang, Bin Hong
Practice has proved that the experimental device fully simulates industrial control field and it is simple operation and flexible structure, the experimental effect is good Introduction In recent years, with the deepening of the reform of the teaching profession, the demand for quality education of engineering professionals especially increases high.
Take the experiment of water level control as an example, it explains PID control theory.
The experiment uses the level of the water tank for controlled object, proportional valve for actuator, and Siemens PLC S7200 for controller.
The valve opening adjusts the outlet flow in order to achieve the purpose for water level control.
K is amplification, R2 is liquid resistance of V2 and C is the capacity factor of water tank.
Online since: February 2012
Authors: Peng Zhang
When the gate is lift away from the sill of 200mm, the motor stops and waits until the water level balance of the front of gate and the back.
Analog input: the transducer of water level of the front of the gate and the back.
Wang: The Design of Automatic sorting of Tobacco Based on FIeldbus, Proceedins of the 8th International Conference of Chinese Logistics and Transportation Professionals. (2008), pp: 1597-1601
Online since: April 2014
Authors: Xiao Meng, Xian Bing Wu, Wu Qun Cheng
Engineering hydrology and hydrologic calculation is a core professional course of agricultural hydrologic engineering, in order to realize the implementation of quality education in higher school teaching purposes, with the teaching practice of engineering hydrology and hydrologic calculation, puts forward the progressive teaching mode of engineering hydrology and hydrologic calculation, and applied in teaching activities.
The Nature and the Status of Curriculum Engineering hydrology and hydrologic calculation is a core professional course of agricultural hydrologic engineering.
This course is an applied science technology knowledge, directly provides reasonable calculation data of hydrology for the planning, design, construction and operation management of hydrologic project, and has played an important role in water conservancy project.
Online since: October 2020
Authors: Jiří Kolisko, Petr Pokorný, Michaela Kostelecká, Vítězslav Vacek
Defects on some of them and unfortunately even accidents of some cases of bridge objects, mainly recently published by media, related to corrosion of prestressed reinforcement awoke interest of both professional and wide non-professional public related to its durability.
Recent breakdowns of some bridge buildings related to reinforcement corrosion steered attention of mainly wider professional public towards points of issue of corrosion of prestressing reinforcement and at the same its anti-corrosion protection.
Defects and Breakdowns Important impulse that attracted attention of not only professional public to the issue of corrosion of steel prestressing strands appeared in relation to an unfortunate collapse of the footbridge in Prague – Troja, connecting Vltava river banks of Císařský island and Troja district.
Penetrating water in some cases also evidently migrated in the core or on the surface of wires of PSC strands, pouring down by gravitation in the direction of longitudinal slope of the bridge deck.
Humidity condition in ducts and slots of the footbridge in Troja was for sure affected by floods during which the footbridge twice fully disappeared under the water.
Online since: June 2014
Authors: Hong Mei Chen, Qing Li
Along with the acceleration of the urbanization process and the continuous growth of population, the municipal water demand would be increased, added to water resource shortages, municipal water supply in Kashgar area is being serious in future.
(Fig.1) Index system of water resource bearing capacity A Index B Index C Water resource system B1 Reservoirs pondage/104m3 Canal system water utilization coefficient/% Water resource of per capita/m3/person Water supply modulus/104m3/km2 Water resource exploitation and utilization rate/% Water resource utilization in unit area/104m3/hm2 Average annual rainfall depth/mm Social system B2 Water resource quantity output efficiency in unit/yuan/m3 The number of professional and technical personnel/person Water consumption quota/m3/d/person Urban domestic sewage water treatment rate/% Population growth/‰ Population density/person/km2 Economy system B3 Water resource productive ratio/yuan/m3 Water consumption per unit of GDP/m3/yuan Effective irrigation area of coverage rate/% Agricultural water consumption quota/m3/104yuan Industrial water consumption quota/m3/104yuan GDP growth rate/% GDP per capita/yuan/person Ecological system B4 Biodiversity index/% Industrial waste water discharge standard
The measurement standard of CW is shown in Tab.1 Tab.1 Regional CW Measurement Standard CW 0.00~0.50 0.51~0.80 0.81~1.00 1.01~1.30 >1.30 Bearing rank Bearing surplus Bearing fitness Verge on deficit Slightly deficit Serious deficit Abundant water resourece Harmony use of water resource Water resource deficit Water resource shortage Serious water resource shortage a)Pressure index of society, economy and ecology the regional water resource beard.
It is demonstrated that the abundance degree of water resource system itself had a strong relevancy with water resource bearing capacity in Kashgar, the relationship between ecological environment and water resource environmental in arid area are very close, the circumstance of ecological environment had a direct impact on water resource bearing capacity. 2) In the water resource system, the availability and natural replenishment of water resource are key factors to water resource bearing capacity.
In the society, economy and ecological systems, the natural population growth and domestic water quota, the industrial and agricultural water consumption, Industrial waste water treatment success rate and biodiversity index are key impacting factors to the pressure of water resource . 3) The order of layer C demonstrated that the degree of water resource bearing capacity in Kashgar had a strongest relevancy with water resource and ecological system, the natural replenishment of water resource, the abundance degree water resource, the treatment toward the harm on water resource’s health from industrial water consumption, the land’s biodiversity are important factors for the water resource bearing capacity.
Online since: October 2020
Authors: Šárka Nenadálová, Michaela Kostelecká, Lukáš Balík, Lucie Kudrnáčová
Brick fragment was saturated with water to a degree usually corresponding to common humidity of uninsulated underground brickwork of historic buildings.
Presented results provide the professional public with basic orientation, specify estimate of drying time in comparison with already used estimate based on Cadierques relationship and provide stimulus for further research. 3.
Experiment Results Monitored parameter of performed tests was diffusion flow of water vapours, i.e. speed of transport of water vapours through surface finish of samples to the surrounding environment under above described conditions.
Results of diffusion flow of water vapours for individual treatments are visible from the following table 3.
Water vapour resistance factors of three wall surface finishing.
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