Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: June 2017
The book is divided 11 chapters that intend to be a resume of the current state of knowledge for benefit of professional colleagues, scientists, students, practitioners, lecturers and other interested parties to network.
In Chapter 2, Silva et al. present a theoretically study of water absorption in unsaturated polyester composites reinforced with caroá fiber at different temperatures by using a transient 3D mathematical model via ANSYS CFX® Software.
They show that the water absorption rate is faster in the vertex region of the composites, and mainly at higher temperature.
Online since: November 2013
Authors: Gui Hong Pei, Lin Zhi Zhang, Li Li Liu
Introduction The main aim of undergraduate graduation design is developing the students' comprehensive ability using basic theory and professional knowledge to solving usual projects problem and improving capability of theoretical analysis, engineering drawing, computer skills and foreign language further.
The undergraduate graduation design is usually scheduled at the last of undergraduate studies, while students are equipped with basic theory and professional knowledge.
Nevertheless, bad subjects can’t excite the student's interest nor attain the aim of educating basic theory and professional knowledge.
In recent years, there has been an increase of topics about gas system layout, gas station design, design of gas transmission pipelines, air-conditioning design and water supply network design.
(1) Topics those were about gas system layout, gas station design, design of gas transmission pipelines, air-conditioning design and water supply network design improve student's ability to have the great help for future jobs
Online since: April 2014
Authors: Li Wei Zhang
For aggregate selection , was elected with fineness of the sand and gravel , the concrete increases with the amount of water it will , because water consumption increases , leading to concrete shrinkage increases, resulting in concrete cracking , was elected with mud large aggregates , as the clay content increases, the concrete shrinkage also increases the tensile strength decreased, resulting in concrete cracking .
Commodity concrete components than traditional concrete has undergone great changes: water-cement ratio and smaller, the amount of cement per unit volume increasing , decreasing cement fineness , new early strength cement production applications , including efficient water reduction agents , including the application of various chemical additives , ground admixtures , especially the use of silica fume .
Admixture requirement.Unless there are special requirements , in principle, to use the early strength agent and expanders, early strength agent when using expanders , there must be professional and technical personnel meansGuide and strengthen concrete curing .
Strict control of the sodium content of superplasticizer.Should be strictly controlled in the sodium content of water-reducing agent , unless there early strength requirements, generally do not make excessive growth of concrete strength .
Chaimo , cast slab structure template and supporting premature removal , likely to cause cracking slab structure , so the construction team should be based on professional units before form removal or construction unit with its own conditions of indwelling concrete block , concrete offers instars strength , in strict accordance with regulatory requirements guiding form removal .
Online since: November 2012
Authors: Zhi Dong Guo, Jia Liu, Cang Bo Li
Professional persons organize staff to sweep the old pavement, the old pavement pothole is filled up with 80% 1-3cm stones and 20% lime soil fill with 12% lime.
Recycling machine must be followed with professionals who check recycling depth, cement content and water rate at any time, and coordinate the machine operator to adjust the machine.
In the process of rolling, surface of the recycled mixture should always be wet, in the condition of its rapid evaporation, should spray water in time.
Rolling forming section should close traffic and water curing in time.
The marching speed of watering car keeps 20 kilometers per hour and can not turn over and brake and stay in curing section, besides that the curing time should not be less than 7d.
Online since: December 2010
Authors: Jan Karlshøj, Anne Dederichs
The six subjects were: Design (including fire strategy), Structural (including structural fire safety), Building Services (energy), Soil and Water mechanics, Urban planning/ Construction Management/ Facility Management, and Design Manager/ ICT Coordinator.
Multidisciplinary teaching - Engineering course in advanced building design, Journal of Professional Issues in Engineering Education and Practice, accepted for publication, 2010
Educating the 21st century construction professionals, Journal of professional issue in engineering education and practice, 2002
Online since: December 2014
Authors: Paula Bajdor, Agnieszka Ulfik, Stefan Nowak
On the other hand, measures which affect economic development professionals, are processes of supply chains, which are easiest to measure in terms of their effectiveness and efficiency, as well as, these activities, traditionally, are the most important part of the business.
Below are some described solutions, that are used by companies to transform their traditional supply chain into a Sustainable Supply Chain: - water stewardship – the company shall endeavor to efficient use of water.
Due to the fact that several of the surveyed enterprises in their production processes use water, first they use the water of the highest quality, second, they treat water as a finite natural resource.
One of the innovative solution, such as the use of high-efficiency water reclamation system equipped with a specialized membrane bioreactor, has enabled the company to achieve the rate of water recovery on 75%, - emissions and energy use – all companies are aware that conducting their business, requires large amounts of energy, but also generates a high level of emissions of pollutants into atmosphere.
Online since: October 2011
Authors: Yue Feng Zhang, Guang Can Zhu, Xi Wu Lu
Besides, in those areas, the technology strength is incomplete, so are professionals of sewage treatment facilities, operation and management.
The tank of water-dropping aeration biological contact oxidation is to oxidize ammonia nitrogen to nitrate.
The sewage is then sprayed in the pulse composite filter media biological filter by an automatic siphon water distributor.
The self-purification capacity of water is fully mobilized relying on algae and bacteria symbiotic theory.
Geenens: Water Science and Technology Vol. 41 (2000), p. 21 [3] USEPA.
Online since: January 2014
Authors: Jun Li, Yu Hua Fan, Bin Xiao
The Chinese government attaches great importance to urban disasters , the Ministry of Construction and the State Environmental Protection Agency to develop a plan of urban disaster prevention and control objectives.Strengthening urban crisis embankment, dam reinforcement project risk , and to Shanghai , Linfen , Baoji three cities as a pilot area for disaster reduction , mitigation efforts to promote the launch of cities across the country , and the establishment of urban information system prediction and mitigation management systems and emergency systems, college established the natural disaster , in some universities have opened mitigation and professional courses , a number of research institutes as the main subject of disaster reduction , various forms of insurance business being conducted , have introduced a number of mitigation laws and regulations, and improve the anti- disaster agency[2].
City of geological disasters , including earthquakes , volcanoes ; collapses, landslides, mudslides ; land subsidence , ground subsidence, ground fissures ; mine water inrush , bumps, stomach roof,coal and gas outburst; coal burn white hot underground engineering harm;mine earthquake,loess liquefaction;soil erosion, desertification, salinization,land swamp;reservoir bank collapse,reservoir sedimentation volume , reservoir leakage , water flooded ; swelling melting ice , rising sea levels , sea people dip , coastal erosion , sea slump ; solid pollution, radioactive pollution categories[2].
Highway geological disaster prevention measures Ground subsidence disaster prevention.In most parts of China , mainly due to land subsidence mining underground freshwater resources are in excess.In view of this , the relevant departments need to do water work to alleviate the status of groundwater overexploitation .Under the National Water Diversion background, step outside basin of water, rational management of foreign water resources, efficient use of water resources and optimize the allocation of control due to over- exploitation of groundwater and land subsidence caused by the disaster .For areas of land subsidence has occurred , you can take steps to pressurized water aquifers , and mitigate or prevent ground subsidence .For a very large amount of land subsidence areas , should immediately stop or reduce the exploitation of groundwater to control land subsidence .At the same time , under the conditions allow artificial recharge , improve the water table , thereby preventing the further
By drainage, dewatering landslide water or reduce rain, snow , etc. into landslide , landslide fell reduce the force .Drainage including groundwater and surface water exclusion exclusion .Support can be excluded using the blind ditch landslide body of shallow groundwater ;Landslide external construction closure drains, surface water slide can be pooled , excluded.When surface drainage needs to be taken to avoid the occurrence of seepage , if necessary, can be used to perform masonry gully and ditch protection[7].
Conclusion First, the combination of highway geological disasters and ITS basic framework, make a key highway geological disaster prevention of intelligent transportation system; Second, analyzed the China mainly face the following kinds of highway geological disasters, ground subsidence, landslides, landslide and collapse, etc.; Third, recognizing the highway geological disaster to our country highway transportation has caused negative influence, in order to eliminate these effects, promote the stable development of highway traffic, combined with geological disaster prevention and control of professional advanced technology puts forward some measures of prevention and control.
Online since: July 2011
Authors: Guang Dao Bao, Xue Wei Wu, Sheng Wei Jiang, Chang Zhai, Wei Wei Jia
Focuses on the geological environment indicators of the establishment and use of AHP to determine factor weights, introduced the system development the overall design concept, the system's basic composition and structure, the system of professional modules, system function, and use experimental regional data to test the system.
It includes two levels: ① element layer, the regional geological setting, resource damage, geological hazards and environmental pollution factor 4; ② index layer, that is, each element including a number of indicators, including mine geological environment back ground conditions, index layer were Selected conditions, including topography, land pressure account for damage, landslides, water pollution, 20 indicators, as the framework of quality evaluation system (Table 1): Table 1: Evaluation indicators of mineral environmental assessment Element layer Background conditions of geological environment Geological Hazards Resource damage Environmental Pollution Index level Landscape condition Collapse Total destruction of the land pressure Water pollution Distribution of geological disasters Landslide Mineral resources Soil pollution Land use Debris flow Water damage Vegetation contamination Vegetation Distribution Ground subsidence Destruction of vegetation resources Average annual rainfall
According to the geological environment evaluation system needs, this system required the following data: the study area based on spatial data, remote sensing image data in the study area, and professional environmental data (soil, water, environmental samples for laboratory test data).
Use GIS for geological environment evaluation, and make full use of its spatial overlay analysis features, will affect the mine geological environment issues, including subsidence, ground subsidence and other geologic hazards and land use and destruction, and other indicators of water damage and single-factor analysis in the computer Stored as a layer, the application of geographic information system (GIS) layers overlay analysis features, combined with the evaluation of this model and determine the index weight calculation method, all layers overlay to generate new regional and layer on new Layers within the property sheet in accordance with its corresponding attribute value classification, the final comprehensive assessment of geological environment by mining district map, the principle shown in Fig 2.
Online since: February 2007
Authors: Róbert Márkus, Oszkár Grega
Besides these, there are professional groups prepare practical propositions they can apply on federal level.
Further slag treatment takes place in the rest-bed by water spraying.
The primary goal of these test was to examine the interaction of slag and water.
We provided a stable amount of water through the system with the help of a pump.
After some time elapsed we took slag samples from the tubs and water samples from the rinsing water which we analyzed.
Showing 781 to 790 of 3745 items