In order to analyze influence of subgrade defects on the dynamic characteristics of ballastless track subgrade, a three-dimensional finite element model of the CRTSâ…¡ ballastless slab track subgrade was establisbed, vertical vibrational displacement and acceleration of sugrade were calculated in consideration...

The bending-torsional coupling effect of a curved bridge is so obvious. To explore the effect of the curvature radius to a curved bridge, the WuJiaWan Bay Bridge is taken as an object of analysis. The bridge is made up of high piers and long-span continuous ridge frame. The relationship of a whole curved...

With the low altitude airspace open in succession in China, the general aviation industry of China began to develop rapidly, so general aviation development prediction has become one of the pressing needs for the future planning of the government and the general aviation enterprise. In view of this,...

Aiming to create a beautiful road in a variety of shortcomings, it pointed out that does not suit to all aspects of creation requirements, starting from the design concept for the improvement of road construction. Traffic engineering from the perspective put forward a number of issues that need attention.

In terms of the existing highway unsuitable beautiful road, in-depth analysis of various aspects of the construction and control objectives, put forward specific content design.

On the basis of discussing the connotation of slope ecological protection, this paper put forward the influence of highway construction on ecological environment and the thought in landscape improvement. 19 kinds of technological principles, technical features, scope of application and landscape effects...

Vehicle emission is nowadays a significant source of climate change and air pollution. In order to control vehicle emissions, road maintenance is considered as one of the controlling method. Hence, it is necessary to find out how maintenance effects on vehicle emissions. Model of Highway Development...

In order to understand the deformation mechanism on the pipeline in steep longer distance seams mining, taking one coal mine as case study, where the gas pipeline from Shanshan to Urumqi, in China is laid across. FLAC3D was adopted to study the deformation mechanism on the pipeline. The simulations reveal...

The paper simulated the mechanical process of transportation of ultra-critical using glass reinforced plastic pipe (GRP pipe). The gas expansion model of micro-cavity in GRP pipe was established based on the experimental results. By analyzing the physical process of gas expansion on the micro-pore, the...

This paper derived an approximate deformation analytical solution of a circular hole which is parallel to the isotropic plane of the layered rock mass. The data comparisons of approximate solutions and numerical solutions are conducted in different radii and stress conditions through the FLAC3D software....

Based on the investigation of the characteristics of the waste rocks of Xinqiao pyrite mine in Tongling, the possibility of AMD was discussed, and the speciation of Cr in the waste rocks was studied by the improved five steps sequential extraction method. The results reveal that the NP is less than the...

A improved dynamic parameters model is presented based on cellular automata in this paper.The dynamic parameters: Direction-parameter, Empty-parameter and Cognition-parameter are formulated to simplify tactically the decision-making process of pedestrians, which can reflect the pedestrian judgment on...

The durability behavior of prepainted steel sheets for construction produced by different companies was studied by neutral salt spray analysis and accelerated UV ageing test with the aid of glow discharge optical emission spectrometry (GDS). The salt spray results suggested that both prepainted steel...

Based on typical historic landslide disasters in the Three Gorges Reservoir, in this short communication, the most important factors that are likely to induce landslides in the reservoir region were explored, and the new trends of landslide disasters after impoundment of the reservoir region were comprehensively...

Two specimen of concrete beam with recycled brick aggregate and a common reinforced concrete beam as contrast specimen were designed. The beams were simply supported, the width and height of the rectangle section of the beams was 150mm and 300mm, the span were 3m, reinforcement and loading method were...

Uncertainty analysis of the parameters of conceptual rainfall-runoff models is studied via application of the Xin’anjiang (XAJ) model as a case study. A new research methodology is suggested. We suggest to fix a subset of insensitive parameters first, and then analyze the uncertainty of the other parameters....

Embankment dam leakage may cause devastating consequences and its early detection plays a significant role in the stability of embankment dam. Conventional dam leakage detection methods, such as piezometric tube or osmometer, are restricted by limitations of spatial distribution and high costs of instruments....

The green construction is the direction that civil engineering can realize sustainable development, there is no specific inferior index about green construction global frame in ‘Green Construction Guideline ’, it is the important condition than can conduct the evaluation about green construction...

We presented a new two-dimensional crack criterion for DDA (Discontinuous Deformation Analysis) method to simulate the failure of pre-crack Brazilian disc marble specimens under dynamic loading. The Split Hopkinson Pressure Bar (SHPB) equipment was used to impact the specimen and check the applicability...

According to the results of pullout-test for adhesive steel bar in concrete, a bond-slip relationship on adhesive interface is established. This relationship reflects effect of some parameters, such as effective embedment length, drill diameter, characters of anchor adhesive, etc., on bonding strength...

The object of this paper analyzes the reliability level of pre-stressed concrete continuous girder bridges designed with the Chinese code (JTG D62-2004) and AASHTO LRFD (2007) using incremental launching method at construction stage. Typical cross-sections used in the example bridge are considered at...

Through theoretical analysis, this paper deduced the optimal slenderness ratio and calculated length of the angle steel. According to the actual stress conditions, this paper figure out the optimal slenderness ratio and calculated length of the large angle steel, large double angle steel, ordinary double...

In recent years, the most commonly used method for the tap water disinfection is chlorination. However, a lot of disinfection byproducts (DBPs) with the nature of carcinogenicity, teratogenicity, mutagenicity can be produced as by-products in the process of chlorination. Therefore, DBPs would do great...

With the rapid development of China's economic construction, construction, water conservancy, mining, railway, highway, etc. are also changing rapidly, the number of high slope gradually increased; the scale is also expanding, so the slope reinforcement technology of cognition and use is very important....

Based on the vehicle load survey data measured by High speed dynamic weighing equipment in Luogang Section of National Highway No.107 and the basic theory of probability and statistics, the parameters such as gross vehicle weight, axle load, wheelbase, vehicle spacing and so on，are statistically analysed...

Although many laboratory tests study on electro-osmotic consolidation of soil, it is not widely used in practical engineering, since influenced by existing problems of electrode erosion, low effiency, uneven consolidation, the effect of electro-osmotic treatment is not perfect. In this paper, several...

In this paper, based on the chemo-thermo-poroelasticity model of saturated porous medium undergoing the local thermal non-equilibrium (LTNE) conditions, the pore pressure and chemo-thermal stresses around a cylindrical hole in an infinite fluid saturated porous medium subjected to sudden variations for...

To effectively assess the reliability of aero-engine main fuel accelerated regulation system under poor failure statistics information, a fault tree analysis method based on interval model is presented. Firstly, according to main fuel accelerated regulation system principle and failure mechanism, the...

The structure of C-bridge is prestressed concrete partially cable-stayed bridge with corrugated steel webs with a main span of 188m, and the span arrangement is 58m+118m+188m+108m, and the form of box-girder section is one-box four-rooms with inclined webs. In this paper, the finite element method is...

The paper is devoted to the behavior of steel-concrete beam with Hybrid Full Web and Truss system subjected to four-point loading mode. Steel-concrete composite beam with HFWT system was investigated both experimental and computational using finite element technic. In the finite element analysis, test...

Low-rise buildings such as lightweight portal frames are often very susceptible to wind effects, owing to their light weight and large span. The numerical simulation analysis of fluid-structure interaction of low-rise lightweight buildings with different roof pitches is performed by ADINA to investigate...

Based on the rainfall profile in the area of the reservoir bank near the dam of Longjiang hydropower plant in Yunnan Province, the authors investigate the landslide under antecedent rainfall. By using the self-developed experimental apparatus, a model test which simulate the landslide under antecedent...

Subsea tunnel construction has become the prevalent tendency connecting countries and districts, Controlling and minimizing the negative influence of channel dredging on tunnel have great significance throughout the tunnel construction and operation phase. So a three-dimensional finite element model...

To ease ship traffic overstock and accidents caused by complex weather in Three Gorges reservoir, the paper took ship traffic organization as the research object. Combined with the features of inland navigation, the paper built up both the safety distance model and safe model for Three Gorges reservoir...

The laboratory compaction method produces a huge effect on the design of mix proportion and performance testing of asphalt mixes. For the result of a performance test to yield reliable physical properties, it is necessary to ensure that laboratory specimens are fabricated in a manner that adequately...

Earlier research has demonstrated that rigid base, when properly applied, can enhance the cracking and rutting resistance of asphalt concrete layers in pavements. This study focussed on developing the temperature stress distribution of roller compacted concrete(RCC) base by conducting appropriate experiments...

During the excavation of rock mass with the method of drill and blast, the release of in-situ stress, also known as excavation load on boundary, is traditional a dynamic process, so the inertia and all other dynamic responses induced by the release of in-situ stress cannot be ignored. Compared with corresponding...

Lots of built or building dams, especially the high arch dam, located in the Southwest China with abundant hydro-power resources. Most of these dams have the characteristics of “High head, Large discharge and Narrow river valley”, therefore, the security researches of energy dissipation were always...

This paper focused on change characteristics of deformation and stability of certain a landslide under conditions of earthquake. The mathematical model of dynamic analysis of earthquake was utilized for deformation and stability of the landslide with weak permeable media. This paper studied change characteristics...

Seismic response of municipal solid waste (MSW) landfill under horizontal and vertical earthquakes has been investigated by dynamic centrifuge testing. The MSW was modelled by mechanically representative model waste. The acceleration response at various depths were recorded and used to investigate the...

High-speed economy development has been overtaking the environment and environmental accounting in china. A detailed chart of the integration of different parts of two extensive knowledge (Accounting and Environment) can help greatly to the understanding of the environmental accounting. This chart, synchronized...

The paper presents a practical data processing methodology to smooth away high frequency noise for water impact problem. At first, original experimental data analysis is employed to design the real time low-pass filter, especially for the cutoff frequency of the filter. At the same time, velocity-time...

6 finite element models of ANSYS were constructed. A material nonlinear finite element analysis by the finite element calculation software ANSYS on reinforced concrete beams strengthened by SGFRP under the gravity symmetric concentrated loads was performed. The load-displacement curves of the models...

This paper introduced the necessity of constructing green ecological architecture system in Wuhan city circle, combined with the characteristics of the development of green building in the city, from the construction of regional green ring, hierarchical planning, promotion of green building materials,...

Effects of aerostatic wind loads on effective elastic modulus and fundamental frequencies of stay cables in bridge are studied by finite element method (FEM). Dynamic responses of stay cables under supports’ excitations are calculated through theoretical method and FEM. Results show that the in-plane...

Larch defoliation by Pristiphora laricis has caused great damage in China. Taking Saihanba Mechanical Forestry Farm of Hebei Province between 2007 and 2010 as the study area, the relationship between the Pristiphora laricis infestation and the habitat factors were analyzed after representative needles...

A better project can always be obtained by system optimization of the typical environmental problems. In order to explore the optimal schedule arrangement, an operational research model based on the shortest path problem is put forward and resolved by MATLAB. The results showed that the whole trip distance...

Based on the principle of dynamic finite element theory, the horizontal axis wind turbine 600kW tower models were established in this paper to study the dynamic characteristics and influencing factors of the wind turbine tower. The author studied three meaningful vibration modes: lateral flexural vibration...

The methods of multiple regression analysis and simplified calculation were used to predict the benchmark of office building energy consumption, the features and the applicabilities of the two methods were discussed based on the comparation of predicted results, and the benchmark of office building energy...

Based on the previous experimental and numerical analysis studies, the design menthod for prestressed concrete frame joints with spread-ended beams are proposed according to home and abroad related design codes and references, and the designed method is verified by test data. The results show that the...

The current design specifications ignore the influence of cut-off walls on foundation pit de-watering design, the calculation formula of water inflow and the predictor formula of drawdown for enclosed cut-off walls insert into impermeable layer and enclosed cut-off walls insert into aquifer layer are...

With the civilian dwelling in the rural areas of Hanzhong in the south of Shaanxi province as research subject, through the questionnaire and on-site measurement, the paper explores the situation of winter indoor thermal environment of local civilian dwelling as well as the measures for improvement....

Little is known about how N deposition affects greenhouse gas balances in different temporal patterns (daytime and nighttime),and few studies have been conducted to quantify the effects of N deposition on soil CH4 uptake and CO2 emission in a typical temperate forests. To investigate the effects of N...

Through and half-through arch bridges are modern bridge types due to the development of steel as a building material, in which up to now the dead-load of the deck system and the live load are transferred to the arch rib by steel suspenders. However such suspenders are due to complex mechanical loading...

The wind characteristics of 6 typical hills (15°, 30°, 45° escarpments and ridges) covered by grass and forest vegetation were investigated by wind tunnel test. The velocity ratio distribution on the crest and downwind slope were obtained, and the effects of slopes, hill shapes and ground roughness...

This paper carried out an experimental investigation on the effects of spatial distribution of bond degradation on the load-carrying mechanism and failure mode of RC beams. Bond degradation was simulated using artificial method and shear performance was investigated through three-point loading tests....

In order to obtain damage evolution characteristics of coal and rock under the compression, conduct uniaxial compression experiment for coal and rock with rigid loading experiment machine based on the acoustic emission. Gather the AE characteristic parameters in the process of coal and rock damage, use...

Photovoltaic power generation, with the advantage of renewable energy and convenient installation, has been widely used in distributed generation in distribution network as the technology gradually developed. Grid-connected photovoltaic power generation station not only changes the structure single terminal...

The engineering quality is very important. With the development of economy and the project construction increasing, the appearance of jerry-built project causes significant financial losses for the country and imposes threats to the safety of life and property meanwhile quality engineering springs up,...

Data mining is a process to find hidden useful information with potential value in huge amount of data. We present a new big data processing system with the data from Oil pipeline inspection. The data mainly get from all kinds of Radio frequency identification (RFID) chips. The system consists of data...

A 220t/h circulating fluidized bed boiler is selected as a research object, the heat loss of the circulating fluidized bed boiler is studied by numerical simulation while the three major parts including the furnace body of the circulating fluidized bed boiler ,cyclone separator and rear smoke channel...

In the present study, intermediate products formed during gold-bearing pyrite biooxidation by moderately thermophilc bacteria at 42℃ were studied by combined using XRD, Mössbauer and Raman spectroscopy. Biooxidation slowdown since 8th day showed that some intermediate products might hampered the further...

In this paper, a 2D numerical simulation model was developed in FLUENT base on a new type thermal energy storage equipment. The results showed that the form of vertical pipes with nozzle holes can create fluid channels and a large number of vortices quickly, which improve the heat charging power, present...

Considering bending stiffness,an finite element model is proposed to overhead transmission based on Euler beam.In this model,the displacement of the unit beam is represented by assumed mode method,and derived the mass matrix and stiffness matrixof unit beam by using assumed mode method,secondly,deduced...

Leaching test on the oxidized zinc ore from Kashi, Xinjiang Autonomous Region is studied in the (NH4)2SO4-NH3-H2O system; Systematic studies are made to show the effects of various factors on the leaching rate of zinc. The optimum conditions for leaching is finally confirmed, i.e., the grinding fineness...

A series of catalysts were studied for removal efficiency of hydrogen cyanide (HCN) under micro-oxygen conditions. It was found that activated carbon modified by Cu, Ce, and cobalt sulfonated phthalocyanine (CoSPc) denoted as AC–Cu–CoSPc–Ce showed significantly enhanced catalysis ability. The influences...

Bamboo steel is composed of recyclable sinocalamus affinis with rich resources in China, environmentally friendly phenolic resin and moisture. The high-performance multi-purpose bamboo-based fiber composite processed with multiple technologies does not require special care and maintenance in use. Based...

A set of simulation equipment is set up after the conditions of removing SO2 and heavy metal Hg (Hg0 and Hg2+) has been investigated, the results of the removal technology method of absorption Hg0, Hg2+ in smelting gases containing SO2 with (NH4)2S is tested, and their composition of reaction products...

With the deepening of marine oil development and the rapid development of marine oil transport and oil industry, marine oil spills become common, causing serious environmental pollution and economic losses. Therefore, for the sudden oil spill incidents, the rapid and effective measures are able to reduce...

The modified γ-Al2O3 adsorbents were prepared by impregnation method has been studied for arsine (AsH3) removal efficiency. The results show that γ-Al2O3 modified with Cu(CH3COO)2 (denoted as Cu/Al2O3) is found to have markedly enhanced adsorption purification ability. In the adsorption purification...

Cavity ring-down (CRD) spectroscopy are attracting widespread interest in gas measurements, especially for gas metrology. However, there still needs more research about its metrological traceability to develop it as a primary method. We developed and assessed a high-sensitive cavity ring-down spectrometer...

Cobalt doped at B site from LaNiO3 with catalyst perovskite structure was synthesized by sol-gal process of thermal decomposition citrates. The gas diffusion electrode was manufactured via a complex process chain of catalyst LaNi1-xCoxO3 (LNC, x=0, 0.2, 0.4, 0.8, 1.0), graphite, sodium sulfate, PTFE...

Recently, researches and applications of denitrifying and phosphorus accumulating organisms (DPAOs) in treating eutrophic water are becoming more and more extensive. Treatment technologies with DPAOs are SBR、A2O、AO、A/O/A etc. and they all have their own pros and cons, respectively. According to...

Nitrous oxide (N2O) is a kind of strong greenhouse gas, which can cause the composite pollution effect to the atmospheric environment. Wastewater biological treatment process is considered to be one of the important anthropogenic source of N2O. Therefore, the research on the generation of N2O in wastewater...

Endocrine disrupting chemicals (EDCs) showed variety and widely distributed in the environment. The presence of EDCs was the most typical in water bodies. EDCs in water accumulated in human and other organism to a certain extent would harmfully interfere the normal functioning of the nervous system,...

Water resources in Chinese rural areas were becoming precious because of the polluted water environment. In this paper, the status of rural areas in China has been reviewed. The typical pollutants in rural raw water bodies were different from urban raw water bodies. In rural water environment, organic...

In order to reveal the influence of reaction conditions on the phosphorus crystallization to recover phosphorus from wastewater with low P concentration, an alternate A/O biofiltration system for simulated domestic wastewater treatment was carried out and the effluent from anaerobic filter was considered...

Steam system is one of the key aspects of energy saving and consumption reduction in iron and steel enterprise. On the basis of analysis the utilization status and utilization potential of steam system in iron and steel enterprises, this paper establishes a steam system energy utilizing efficiency assessment...

For the sake of the shortage of phosphorus resources and the present situation of municipal sludge treatment and disposal, the necessity of recovery of phosphorus from municipal sludge is analyzed, whereas the methods of phosphorus releasing from solid phase to liquid phase in sewage sludge, such as...

In this paper, a review on the mechanism of denitrifying phosphorus removal and the enrichment of denitrifying phosphorus-accumulating organisms in the process of nitrogen and phosphorus removal, such as A2/O and SBR, were presented, as well as the influence factors of enrichment were also carried out....

With the rapid development of China's large-scale mariculture, the emissions of mariculture wastewater are increasing, which had already exceeded land-based sewage, and becoming a serious marine environmental problem, therefore, the treatment and control of large-scale mariculture wastewater have been...

With the development of modern industry and communications industry, a variety of metal wires are used more and more. At the same time, the number of cables required waste recycling is also increasing and the environment pollution has become more serious. Currently, cable for waste recycling technology...

Nitrous oxide （N2O） is one kind of potent greenhouse gas which can destroy ozone layer and lead to acid rain. Furthermore, nitrous oxide is quite easy to be converted into the secondary particle pollutants which can aggravate haze in certain weather conditions. Effective control of N2O emission has...

Recently, with the rapid development of industry, the pollution of organic compounds and ammonia nitrogen is serious in source water. It is difficult to ensure the removal efficiency of ammonia nitrogen and organic compounds in effluent by conventional treatment technology. The article brings out the...

This paper reviews the status and progress of biological denitrification and phosphorus removal. The mechanism of denitrification and phosphorus removal is analyzed briefly, and the characteristic of some denitrification and phosphorus removal process is also compared. The new process and new technology...

Airport ecological community is a prospective subject of environmental protection, and is the development direction of airport building. But there is no universal set of formal evaluation system for airport ecological community. From the connotation of airport ecological community, this paper discusses...

In the static conditions, experiments were carried out to study the purification ability of Eichhornia crassipes and Pistia stratiotes from varying concentrations of landfill leachate. The results show that Eichhornia crassipes and Pistia stratiotes were poisoned to death completely in high concentration...

The hydrometallurgical process of leaching molybdenum and nickel from black shale without reagent was investigated. The extraction of Mo and Ni from molybdenum-nickel ore by oxygen pressure leaching, which exploit the characteristic of molybdenum-nickel minerals contain high concentration amorphous sulfide...

Molten steel temperature is a key parameter related to LF refining, and it has an important influence on steel quality and casting. Aimed at a steel ladle with capacity of 300 tons, a heat transfer model was developed. Ladle wall and bottom lining temperature distribution curve was obtained. The factors...

Molten steel temperature in ladle after converter tapping has a strong effect on yield rate of alloy, dosage of deoxidizing agent and production efficiency. A mathematical model taking ladle thermal state into account was established for temperature prediction of molten steel during tapping and it was...

Compared with conventional activated sludge system, applied magnetic field or adding magnetic materials in activated sludge system exhibits a better performance of enzyme activity, sludge settling, microbial activity. It also shows an obvious influence on bacterial activity, dissolved oxygen and pollution...

Anammox process has been recently recognized as a promising technology for nitrogenous contaminants removal. of the anammox attracted more attention because of its lower sludge production and cost of without adding organic carbon source and aeration, In this study, the development of anammox, application...

The grassland ecological protection subsidiary-award policy is a new policy, with the largest scale and widest range in China since its foundation. This policy isalso expected to bethe most importantlong-termgrassland ecosystem protection policy and measurement. From a macroscopic perspective, the effects...

By making use of the experimental system of explosive load digital laser dynamic caustics, it is to carry out dynamic crack analysis for the tip crack initiation and propagation process of precracks near the blast hole and study the directional crack controlled blastting mechanism, thus obtaining changes...

Through the analysis of the key issues of Wind-solar photovoltaic hybrid generating system (WPGS) and electric system, this paper proposes a WPGS method applied to pure electric vehicles. Establish a mathematical model of WPGS in the Simulink environment, make simulation analysis on the vehicle based...

The effect of leaching conditions on the enriching iron was studied after pre-treatment of pyrite cinder. And the influence of acid leaching temperature, leaching time, pH value and the ratio of liquid to solid on enriching iron was done. The results show that, when the acid leaching temperature was...

The experiment selected zeolite from ten absorption agent to adsorb potassium. Through the investigated of amount of zeolite, adsorption time and temperature, found the best parameters. When zeolite was used with 2g, adsorption time was 60min and temperature was 20℃,the extraction rate was 66.67%.The...

The paper focuses on separating the coarse slime for the particle size ranging from 0.3 mm to 2 mm in the teetered bed separator. The product yield and ash are researched as well as the partition ratio. The result shows that R-Z model and Das model give prediction with worse precision，Asif model and...

Development and utilization of new energy is to optimize the energy structure, an important measure to improve the quality of the environment. Universal application of new energy technologies in rural was targeted in Qinhuangdao City of Hebei Province. The promotion of rural biogas digesters, solar and...

A facile approach was introduced for the synthesis of hybrid-microspheres (MSs) of melamine formaldehyde resin (MF) and aluminum hydroxide (Al). Wherein, the uniform MF MSs were firstly prepared under acid conditions, and then hybridized with aluminum hydroxide under urea solution presence and decomposition...