In this paper, according to the debris flow problem in the region of karst through fault fracture zone, a test concerning the evolution of permeability for mud rock were carried out. Such conclusions were gained: initial deposition deformation and micro crack closing play a greater influence on the evolution...

With people's strengthened environmental awareness and the decrease of free formaldehyde content in water soluble polyvinyl alcohol (PVA) building adhesive, the problems about mildewing and change of quality in PVA adhesive are getting people's attention. The reasons for the adhesive mildewing were studied...

With the development of China economy the demand of electric power is increasing. Power grid entered a rapid development stage and a series of problems about power grid construction projects' investment is becoming more and more attention. First, combined with the content of the power grid infrastructure...

The safety of production in mines are significantly affected by Ordovician limestone water disaster from coal floor, it is very important to evaluate and forecast floor water invasion. Analyzing its influence factors and setting as evaluation indexes for risk assessment of floor water irruption. The...

The qP-wave equation is one of extremely important question in seismic exploration, seismology, and so on. However, its poor stability, the traditional finite difference scheme for qP-wave equation modeling suffer instability easily and numerical dispersion seriously. This paper propose a novel difference...

GKS -mappings and GKS-majorized mappings are introduced, and maximal element theorems for GKS -mappings and GKS-majorized mappings are established in GFC-spaces. As application, a new equilibrium existence theorem for systems of general quasiequilibrium problems is obtained.

Water injection is a main method in the development of oil field in order to obtain high recovery efficiency, especially for the complex reservoir. This paper is concerned with water injection development of complicated stratum reservoir. It introduced the special condition of the water injection area,...

Coal is used as the basic energy source in China, however, the exploitation and utilization of coal has a serious environmental impact. Compared to coal and petroleum, the LNG has less storage space, easy transportation and storage, large calorific value, and higher safety performance. Therefore, we...

A comprehensive mathematical model has been revised to estimate greenhouse gas (GHG) emissions by urban wastewater treatment plants (WWTP) resulting from on-site activities. The contribution of individual processes and well-management levels of WWTPs to the production of GHGs in hybrid treatment system...

Rapid urbanization brings a quick growth of urban environmental pressure. Food consumption is taken as one of the most resource demanding and polluting daily activities in urban life, and is also the important part of urban environmental impact. We calculated the environmental impact of urban food consumption...

Shale gas and coal-bed methane are very important unconventional resources. Shale gas and coal-bed methane are the most effective supplement of the conventional fossil energy, and the quantity of these resources are abundant. So the shale gas and coal-bed methane have been gained comprehensive attention...

According to the energy development policy and energy structure adjustment in China, this paper puts forward the utilization strategy of goafs based on correspondence analysis. Firstly, the correspondence analysis was used to discriminate the goafs with hidden collapse risk and research the collapse...

In view of the roadway threatened by confined water are prone to water-inrushing during operation service, industrial test of supporting parameter optimization had been carried out in deep mine. This paper analyzes time effect of water inrush and prevention measures, and put forward the optimization...

System efficiency of pumping wells is an important indicator of whether the oil well running well. The higher the single well system efficiency, the more balance in whole system, and the less consumption of electricity. The results of test show that the pumping wells average system efficiency of Chaheji...

In order to investigate the effect of heavy metals of the gangue on the surrounding soil, fresh gangue and soil samples along from certain gangue mountain were collected. Nine heavy metals of Cu, Pb, Zn, Cd, Ni, Cr, As, Hg and Ba were detected and the relevance of gangue and soils was analyzed. Several...

Under strategies of sustainable development, it is worth analyzing the matter of energy efficiency, therefore, how to improve the energy efficiency of enterprises has a very important significance. In order to effectively evaluate and analyze the economic efficiency of Chinese coal enterprises, this...

Heterotrophic bacteria play important roles in the biogeochemical cycling of key elements and serve as crucial links between dissolved organic carbon and sinking particles. Trace elements can directly and indirectly affect heterotrophic bacteria abundance. Two microcosm experiments were onboard in different...

From the analysis and arragment of historical data of wind turbine pitch motor temperature wind speed and other related parameters of hebei chigu wind farm in 2015 ,the paper obtains historical data using 10 minutes as acquisition unit under various operating conditions of wind turbine pitch system from...

The aquifer water-abundance evaluation and classification play an important role in the prevention and control of coal mine water disasters. Based on attribute mathematical theory and similar coefficient determining method, this paper propose an attribute mathematical systematically model for the aquifer...

With the continuous growth of energy load, causing environmental problems have become increasingly prominent. Nitrogen oxides and sulfur dioxide and other gases cause serious environmental pollution. Harm of carbon dioxide, soot and heavy metals is increasingly prominent. Therefore energy conservation...

Based on the meteorological and hydrological data collected from in Xiangxi River watershed during 1974 -2010,the mutation point of the sediment yield and precipitation were detected with the help of Pettitt test,accumulative anomaly analysis and double mass curve analysis . Meanwhile ,the proportion...

Galanga essential oil (GEO) liposomes were prepared by ethanol injection method and were characterized by size, polydispersity index (PDI) and zeta potential. Furthermore, the quality evaluation was conducted using the morphology observation and preliminary stability test. It was shown that Galanga essential...

A study of characteristics and speciation of 7 heavy metals in agricultural soil near mining smelting of Hezhang were analyzed. The heavy metal concentration were determined by using ICP-OES, the chemical fraction concentrations of heavy metal extraction were used a modified BCR-SEPs. Tucker 3 was used...

This paper briefly describes the relevant conclusions of the mixed finite volume method is mainly based on a set and two mesh mixed finite volume method on triangular mesh, also lists the convergence results corresponding format.

SnS2/TiO2 composite photocatalysts with high visible-light photocatalytic activity were synthesized via the hydrothermal treated from tin (IV) chloride pentahydrate, citric acid, thioacetamide and commercial P25 TiO2 at 150 §C for 12h. Powder X-ray diffraction and transmission electron microscopy revealed...

Based on the topological theory and MATLAB program, electrotopological state indexes (En) were calculated for 114 polycyclic aromatic sulfur heterocycles. A six-element regression model of quantitative structure-retention relationship (QSRR) for retention index (RI) as a function of En was constructed...

Arable land is the soul of land resources and has the core status of national food security. In this study, according to the resources(arable land natural quality and production capacity)and environment(soil environment)combined perspective, definition the concept of arable land health, explore the principles...

Climate change has been one of the most serious problems faced by people. In order to reduce CO2 emission, the study is to analyze reasonable traffic mode shares through the proposed optimization model. On the basis of literature review and experience on low carbon planning in traffic system, an optimization...

A sustainable development country was defined as "a country or a region has a capacity of the health continuous growth, against the undue consumption of resource, based on the existing conditions without considering the emerging technical breakthroughs". A country's sustainable development capacity was...

An analysis of strength, weakness, opportunity, and threat (SWOT) was conducted to compare the management of crop straw using three different disposal methods including traditional household energy utilization, biomass briquette technology and biochar technology. The results indicated that the biomass...

In order to obtain characteristics of spatial distribution of restaurants in built-up area of Chuxiong city, the paper used average center, median center, center element, standard distance, direction distribution, k-means clustering method and buffer analysis to analyze it, then these conclusions could...

Appropriate digestion of environmental sample, including soil, sediment and dust, plays a key step in their total heavy metal detection. In order to explore the optimized digestion method, 8 kinds of commonly used hybrid acids groups were selected to simultaneously detect total concentrations of Pb and...

Due to long-term development of water injection and vague awareness of heterogeneity in Tou Tai oilfield, remaining oil form and gather, which form potential area. In order to resolve this problem, fine division and correlation of strata is needed. In guidance of theory in high-resolution sequence, considering...

In this paper, we conduct research on the novel spectrum allocation algorithm based on the graph coloring. Today, with the constant development of wireless communication technology, people demand for it is growing. The current communication resources are becoming increasingly nervous, the lack of spectrum...

This paper established the Measurement Model of Sustainable Development to determine the level of sustainable development of one country by processing the data with some fuzzy sets methodologies. Then We took Madagascar for an example, using the Principal Component Analysis and the data inside World...

In order to explore spatial distribution of placenames of YI language in Yunnan province, the paper used Getis-Ord General G, spatial autocorrelation, clustering and abnormal values and Getis-Ord Gi* analysis methods to analyze it, then these conclusions could be drawn as follows. The spatial distribution...

The propose of optimal configuration of micro grid is to reduce economic costs,enhance power supply reliability and improve environmental performance. This article introduces the basic structure of diesel-wind-solar-battery micro grid and power supply model. Taking the minimum annual value cost as economical...

Aiming at the characteristics of high gas coal seam hosting and the problem in the process of coal gas control, this article mainly focus on the research of the gas drainage technology in the goaf and the coupling characteristics with the explosion proof device. First of all, it describes the comprehensive...

When the nuclear accident of equipment system happens, the right decision can be taken to reduce the consequences and harm of the accident. Considering the fuzziness and multi-objective of the nuclear emergency decision of equipment system accident and aiming at the deficiency of the traditional AHP...

Base on elastodynamics, complex function method with mapping function and Green's function method are used to investigate the scattering of SH waves by an elliptic inclusion with a partially debonded region. The bi-material half space is divided into two parts along the vertical interface to investigate...

In this work, the realization of density reinitialization with Smoothed Particle Hydrodynamics (SPH) techniques is examined. A self-adaptive density reinitialization method is proposed. Instead of using fixed step intervals for reinitialization, this method obtains oscillation of density field by introducing...

The availability of the equipment system is calculated with the Monte Carlo simulation and GO method based on the principle and operation characteristics of the equipment system in this paper. The analysis results show that this method has high simulation accuracy and can more accurately and objectively...

Currently, how to innovative use of big data becomes hot issues. Cloud computing, a new generation of information processing technology to examine the key issues in the development of modern cities, especially by means of data processing, data completely solve the problem that need to solve in the urban...

Graphite phase carbon nitride (g-C3N4) as a novel semiconductor photocatalysts attracted widespread attention in recent years. In this paper, the lamellar g-C3N4 nano-materials prepared from solid urea was used as a photocatalyst to degrade the simulated dye wastewater under visible light irradation....

This work experimentally used the corncob to product hydrogen with Thermoanaerobacterium thermosaccharolyticum M18. The initial pH of culture medium, particle size of the corncob and NaOH pretreatment condition were researched and optimized to get high yield and efficiency of hydrogen production. Moreover,...

The aim of this paper is to research variation of phenolic yields in bio-oil and the effect of interactions of three components in biomass, fast pyrolysis experiments were done with cellulose, xylan (as an alternative to hemicellulose) and lignin in tube furnace at different temperatures. Phenolic yields...

In the traditional three-phase four-bridge inverter control strategies, such as SAPWM, 3-D SVM, the control system of them are quiet complex, difficult to achieve engineering application, and the stability is poor. Therefore, in this paper, based on the combination of the model predictive current control...

Under the research background that large scale new energy base located in the Hexi corridor area, in view of typical high-energy loads in Gansu province, such as silicon carbide, aluminum electrolytic, focus on key electrical equipment in production processes, adjustable features of high-energy loads...

Hydrogen production by conversion of lignocellulosic biomass is both sustainable and environmentally friendly, which has been paid more and more attention all over the world. It is also a great significance to face and alleviate fossil fuels consumption and climate change. The update research advance...

Based on 53 years of daily meteorological data from 1961 to 2013 provided by 19 meteorological stations in Hebei Provence, seven algorithms of Penman-Monteith (P-M), Hargreaves-Samani (H-S), Irmark-Allen (I-A), Pristley-Taylor (P-T), Makkink (M-K), Penman-Van Bavel (PVB), 1948 Penman(48-PM) were used...

Two irrigation treatments (W1,total irrigation amount was12L.W2,total irrigation amount was 6L) and three vermiculite laying methods (Z0, no vermiculite. Z2, vermiculite was laid on the surface of the pot.Z2, vermiculite was laid in the bottom of the pot) were designed in the trial. The results showed...

According to the new application requirements of outdoor air quality monitoring system,a novel outdoor air quality device was designed in this paper.The device utilizes solar power supply, combined with digital control, wireless communications, LED display and other technologies, to realize air quality...

Fertigation (Integrated management of water and fertilizer) aims to control irrigation water and nutrient application comprehensively according to crop requirements, in order to promote fertilizer nutrients uptake by water, and to enhance water and nutrient use efficiency in farmland. This paper analyzed...

Self-assembly fishbone-like PbMoO4 were fabricated via separation of Pb2+ from plumbeous solution and combining with MoO42- in another solution containing organic dye, based on a supported liquid membrane (SLM) system. The photocatalytic activity of PbMoO4 to degrade the organic dye was measured, which...

Surface water in Hangjiahu area is characterized by high content of NH3-N and organic micro-pollutants, which is in need of biological pretreatment process in water treatment plant. Based on the comparison of the characteristics of four biological pretreatment processes such as biological oxidation pond,...

A nano ZnO/polyaniline composites was obtained in situ polymerization of polyaniline nano zinc oxide surface, using ammonium persulfates as the oxidant, through a silane coupling agent KH550. And the secondary Doped Nanometer ZnO/polyaniline was obtained using HCl, phosphoric acid and sulfosalicylic...

When disassembling and checking the outer cold water pipeline of the third cooling tower in Tianshengqiao Station, we found that the scaling circumstances of the outer cold water pipeline inwall of the 1# tower, 2# tower and 3# tower are very different from that of the radiating coiler. In the 3 cooling...

This paper was directed to solve the energy-saving and environmental protection technology. Solved the practical problem of the significant reduce of mechanical property when we putted the heat transfer pipes into the concrete pile, and solved the problem of the thin air layer between the concrete and...

In the present research, single-factor experiments and a three-variable, five-level central composite design were performed to study on the ionic liquids-based ultrasoni-assisted extraction of total flavonoids from Manilkara zapota leaves. The optimum parameters were: 0.95 M [C4MIM]Br, liquid/ solid...

In this paper, a new kind of porous metal fiber sintered sheet (PMFSS) with high porosity was fabricated with cutting stainless steel fiber. And heat transfer experiments were conducted to investigate the effect of porosity and flow rate on the heat transfer properties of PMFSS. Metal fibers formed a...

In order to improve the hydrophilicity and mechanical strength of the membrane, the modified PVDF ultrafiltration membranes were prepared by the phase inversion method with different contents of nano graphene dispersed uniformly in the PVDF casting solution. In the experiment, the effect of graphene...

A new kind of Naphthalene Formaldehyde Superplasticizer (M20N80) was prepared through the modification of black liquor and Naphthalene Formaldehyde Superplasticizer (N) through an Fe2+-H2O2 reaction system. The synthesis process and synthesis mechanism of M20N80 was introduced. Infrared spectrum analysis...

In this study, wheat straw loaded with neutral red was reused to adsorb congo red (CR) from aqueous solution in a fixed-bed column. Compared to wheat straw, adsorption capacity of NR-loaded wheat straw towards CR was significantly higher. The the flow rate, the influent concentration of CR and bed depth...

In this study, the ability of wheat straw to adsorb neutral red (NR) from aqueous solution was investigated in a fixed-bed column. The effects of the flow rate, the influent concentration of NR and bed depth on breakthrough curves, were studied. The adsorption quantity was 26.4 mg/g at initial NR concentration...

Frictional behaviors of nitrile rubber of screw pump stators with liquid nitrile rubber (LNBR) as a plasticizer with different mass portions(5,10,15,20) are investigated by the MPV-600 wear tester, and their physical properties and curing characteristics are studied. The morphologies of worn surface...

11 atmospheric particulate matter sampling sites was created around Miyun reservoir to analyze the mineral composition, element concentration and sources of atmospheric particulate matter pollution by using ICP-MS and XRD analysis. The results show that there are many iron minerals and some unweathered...

We establish a three dimensional current field using Mike3 Flow Model in the Beibu Gulf. The accuracy is verified by comparing the current data with the measured data of an offshore oil platform. We calculate the wind-tide coupled current by adding the daily mean wind field. On this basis and decoupling...

In this paper, we propose a small-world network model composed of fractional-order R”ssler oscillators. We investigate the phase synchronization in this fractional-order chaotic oscillator network. Through numerical simulations, it is found that the fractional-order chaotic phase synchronization is dependent...

A stannate conversion coating was designed for AM60B magnesium alloys. The influences of temperature and time on the surface morphology and phase composition have been tested using scanning electron microscope (SEM) and X-ray diffraction (XRD), respectively.Additionally,potentiodynamic polarization tests...

In this paper, we established a 3D nonlinear finite element analysis to high-strength bolt T-stub beam-to-column connections, Study and discussion the influence of beam section height to the hysteretic behavior, ductility and dissipation capacity of the beam-to-column connections . The results showed...

In this work, we report an approach to prepare helical nanofibers via co-electrospinning. The results of the experiment demonstrate that Composite spinneret is necessary for the formation of helical fibers. The off-centered system could produce more uniform helical structures. In order to explore the...