With the wide application of concrete materials, the problem of concrete property degradation caused by external environment condition has drawn the attention of civil engineers. In order to study the influence of environmental factors on the durability of normal strength concrete (NSC), three groups...

The corrugated steel pipes utilize the advantages of steel, such as high ductility, tensile, compressive and shear strength. So the problem of foundation deformation and uneven settlement of foundation can be solved nicely. The corrugated steel pipes show good adaptability for adverse geological condition....

At present, the heavy metal pollution has become one of serious environmental problems which has drawn the great attention to scientists. Biochar has great sorption capacity to heavy metals. It has become one of hotspots research of soil science and environmental science because of its huge application...

The mechanical property and wave velocity of fine sandstone after different high temperature such as 25 400 600 800 and 1000 , be test studied by the servo-controlled testing machine RMT-150B and ultrasonic nondestructive testing instrument TUA2000A. The test results show that: (1) the sensitivity of...

Glass fiber reinforced plastics of composite material briefly as FRP, with the properties of high strength, light, corrosion preventive, easy to be Processing convenience and industrialization, which is applied in many fields. Although it has been applied in building, only to small element or unit such...

The interfacial debonding behavior of short-fiber-reinforced composites (SFRC) can be an interesting subject for many investigators. In this paper, the effects of interphase properties on the interfacial debonding behavior of SFRC are investigated. Based on the shear lag model, the initial strain of...

Epoxy resin composites were prepared via in situ polymerization of diglycidyl ether of bisphenol a epoxy monomer and 4,4'-diaminodiphenyl methane, using multiwalled carbon nanotubes and hexaphenoxycyclotriphosphazene as additives. The morphologies of the specimens were investigated using scanning electron...

The possible use of activated carbon (COASAC) prepared from camellia oleifera abel shells (COAS) by phosphoric acid activation as a biosorbent in the removal of Cr (VI) from aqueous solution was demonstrated. The effect of different parameters such as initial concentration of Cr (VI), dose of adsorbent,...

Effects of different Al additions (3wt.%, 5wt.%, 7wt.%, 9wt.% Al) on as-cast microstructure and properties of Mg-Al-1Si-0.5Sr alloy were studied. The average grain size decreases and then increases with the increasing of Al additions. There are polyhedral shape, fine fibers shape, a few Chinese script...

The Fe2O3 nanopowders were prepared by Solid Phase Reaction. The phase composition, microstructure, magnetic properties and gas sensor properties were investigated by XRD, TEM, VSM and gas sensor measuring system. It was shown that the precursor could be transformed into -Fe2O3 of the spinel structure...

Polyaluminocarbosilane (PACS) is an important precursor of SiC ceramics. And the molecular distribution of PACS has an essential influence on the properties of its derived ceramics. The importance of absolute molecular weight analysis of PACS and the convenience of gel permeation chromatography ( GPC)...

TDI based Thermoplastic polyurethane/graphene nanoplatelets(TPU/GNs) thermal conductive composite was in situ synthesised at room temperature, using polytetramethylene glycol(PEMG) as soft segment,4-Methyl-m-phenylene diisocyanate (TDI) as hard segment, 1,4-butanediol (BDO) as chain-extending agents,...

The ES-U3160 reinforced fabrics with toughening function were prepared by adhering the Ex-situ elasticizer polyethersulphone homogeneously on reinforced fabrics according to Ex-situ toughening technology. Composites were prepared by RTM process taking U3160 and ES-U3160 fabrics as reinforcement. The...

Studied the curing reaction of bisphenol A epoxy resin DER331 system by the way of non-isothermal DSC and phenomenological model, using n-stage reaction and phenomenological model determined the curing kinetics equation, the results showed when the ratio of the epoxy resin DER331 and curing agent was...

Curing reaction of bisphenol-A epoxy resin were researched by non-isothermal DSC. The experiment result showed that the cured structure were excellent when the proportion between the bisphenol-A epoxy resin DER331 and curing agent DEH622 was 100:30, the reaction heat was 358.53 J/g which is 4 to 9 times...

Bismaleimide(BMI) structural foams employing carbon naotubes (CNTs) as functional fillers were prepared in this paper. Physical dispersion methods, such as mechanical mixing, ball milling and calendering process (three-roll milling), were adopted to disperse CNTs in the bismaleimide matrix to foam. The...

In view of the problems like incomplete penetration caused by the traditional MAG welding, laser-MAG hybrid welding of 12 mm thick corrosion resistance steel was studied by using the SMA490BW as the research object, which was the material of high speed train bogie. By comparing weld formation, residual...

In this paper, germanium oxides/oxynitrides were prepared in different gases. The effects of different gas ambients on the electrical properties and reliability of Ge MOS capacitors were analyzed. The experiment results showed that the nitride incorporation could improve the performances of Ge MOS capacitors...

In order to analysis the type of XLPE cable partial discharge, and grasp characteristics of partial discharge caused by different defects. In this paper, we use a 10kV 30-meter-long XLPE cable and design different types of defects. Then we collect the PD data of different defect model by PD data acquisition...

In order to study the application of Weibull distribution in cable partial discharge pattern recognition. We apply a 10kV 30m XLPE cable for this study. Then design four kinds of typical artificial defect model and analyze each of defect model’s discharge pulse signals. Finally, estimate the Weibull...

Quality control data of heavy metal content (in terms of Pb) detected by atomic absorption spectroscopy in moulded polyethylene packaging material were analysed. A hypothesis of normal distribution was accepted at the 95% confidence level. Established individual and moving range charts indicated that...

Li/LiCo1/3Ni1/3Mn1/3O2 and Li/graphite half cells filled with methyl acetate (MA) with 1M LiPF6 function very well. Cells filled with 1 M LiPF6 in EC:DMC:EMC:MA(1:1:1:3) show good capacity retention 147.5 mAh g-1 after 50 cycles at 25 °C. Electrochemical performance of Li-ion batteries is analyzed via...

Spinel LiNi0.5Mn1.5O4 cathode has attracted considerable attention because of its high energy density and operating potential. However, current carbonate electrolytes cannot meet the demand of this high voltage cathode. Here, we demonstrate that fluoroethylene carbonate (FEC) substantially improve the...

Fe2SiO4@C nanocomposites are prepared via a solid state reaction by controlling different calcinating temperature (600 °C 700 °C and 800 °C) under the flow of nitrogen gas. XRD analysis indicates that a typical -Fe2SiO4 phase is detected in the Fe2SiO4@C nonocomposites calcinated at 700 °C and 800 °C....

The paper presents a novel method for the spectrophotometric determination of trace Cu2+ after flotation separation using sodium chloride-ammonium thiocyanate-dodecyl dimethyl benzyl ammonium chloride system.The effects of the dosages of NH4SCN and dodecyl dimethyl benzyl ammonium chloride (DDBAC),various...

Interactions of polycyclic aromatic hydrocarbons (PAHs) with graphene quantum dot (GQD) and graphene oxide quantum dot (GOQD) were probed by local density approximation of density functional theory with empirical dispersion correction. Simulation reveals that van der Waals force is the main mechanism...

In the progress of industrial production, coal gangue, fly ash and other wastes was produced, which contains aluminum, iron, silicon and other important components of coagulants. Made full use of those materials could change it from waste into valuable products and used for wastewater treatment which...

A new extraction of flavonoids from navel orange peel by optimization of ultrasound-assisted were studied , The effects of ethanol concentration, liquid/solid ratio, extraction temperature, ultrasonic time, and extraction time were investigated. The results showed that: the extraction yield of flavonoids...

It’s been widely used that Synchronize data Sampling with GPS clock. But, the precision should be improved when it’s used for dielectric loss test in a substation. In this article, it’s studied that a portable testing system which based on high-precision sampling synchronously with GPS and wireless....

Interconnected hierarchical porous carbon (IHPC) was prepared by a poly(high internal phase emulsion) (polyHIPE) and carbonation method based on phenolic-formaldehyde resin for supercapacitors. Structural and morphological characterizations of IHPC were carried out using field emission scanning electron...

It has become an action plan to develop biodiesel in China. The botanical and laboratory investigations together with literature surveys had been used to prospect potential plants for biodiesel development. Based on field surveys and collections of specimens and samples, 422 oil-bearing plant species...

The MnOx nanowires loaded by cerium oxide are synthesized using hydrothermal method and impregnation method. The products exhibit excellent performance on selective catalytic reduction denitration experiments at low temperature. Meanwhile, the obtianed Mn Ce composite oxide are characterized by X-ray...

To verify the battery bracket fatigue life of electric bus , the finite element model of the battery bracket is built, and the equivalent stress distribution of the frame was got. Multi-body dynamics vehicle model was built in ADAMS/Car. The simulation analysis was conducted based on the road spectrum...

Ag/AgCl/Ag3PO4 plasmonic nanocatalysts were prepared through the ion exchange and subsequently light-induced process. The obtained samples showed a high photodegradation capacity for prometryn, bentazone and metribuzin under visible light irradiation. Effects of reduction time (RT) and Cl/P in the synthesis...

Viscosity restrain the road performance of asphalt mixture with geothermal regeneration. In the design and construction of the geothermal renewable asphalt pavement, the thickness of the regenerated layer is one of the most important factors that affect the mechanical response of the material. In order...

This study designed a green one-pot method for furfural production from corn cobs that were heterogeneously catalyzed by recoverable solid-acid ZSM-5. The highest furfural yield of 78.5% was obtained under the following conditions: 473 K, 30% ZSM-5, 15 mL of toluene, and 500 mM of NaCl for 2 h. Catalyst...

The amino modification montmorillonite was prepared using the cetyl trimethyl ammonium bromide as modifier by the microwave irradiation and common heating method. According to the analysis of infrared spectra, scanning electron microscope and specific surface area, it is found that the larger amount...

In this paper, we prepared Ni/C, Pd/C and Pd-Ni/C binary alloy nano-catalysts by the impregnation-reduction method. The structures of all catalysts were characterized by XRD and TEM. The electro-catalytic performance of all catalysts on H2O2 reduction were studied by cyclic voltammetry(CV) and linear...

The aim of the present research was to prepare an organic iron compound, Lycium barbarum polysaccharide iron complex (LBP-Fe), and evaluate its antioxidant abilities on scavenging super oxide radicals and DPPH radicals in vitro. LBP-Fe was prepared by chemically modification using chloride ferric and...

The six prism type Ce0.7La0.3O2- solid solution was prepared by reverse co-precipitation method with urea and Na2CO3 as double precipitant. The reverse method favored the washing of precipitate and formation of rod-like CL. Using urea as a homogeneous precipitating agent before precipitation with Na2CO3...

Electrical joint compound is widely used in metal connections of high-voltage electrical equipment. Based on studying a defect of electrical equipment connection fittings, the influence of electrical joint compound on the temperature rise of electrical equipment was studied according laboratory experiment...

To observe the improvement of Schisandra and Epimedium extract (WY) on the memory ability in mice. Methods: ICR male mice were randomly divided into control group, low-, medium- and high-dose WY groups. The mice were intragastrically given the same volume of distilled water, 300 mg/kg WY, 600 mg/kg WY,...

In this paper the issues of impervious performance based on fly ash clay are analyzed in detail. The specimen preparation experiment and variable head permeability experiment are introduced. The experimental results of this paper can provide reference for practical engineering application of fly ash-modified...

The organo-montmorillonite supported nanoscale zero-valent iron material (M-NZVI) was synthesized to degradate decabromodiphenyl ether (BDE-209). The kinetic and influence factors of apparent rate constant on debromination of BDE-209 by M-ZVI were studied, the experiment was conducted to investigate...

With the development of large capacity and high parameters of power plant boiler, water wall high temperature sulfur corrosion of coal-feed boiler is becoming more and more frequent. Some of these corrosion even have affected the boiler operation safety. In this review, the domestic research in high...

Taking example for Pu'er raw tea 7542(106) in paper, sample pre-treatment conditions ( Headspace) and detection of the gas chromatography mass spectrometry (GC-MS) were optimized. Under the condition of optimization, the chromatographic fingerprints of nine batches of Pu'er raw tea 7542 sample for different...

Noise from the power substation is an arousing environmental issue in recent years. Noise has also been strictly required by GB12348-2008. Noise measuring on certain power substation stations show that noise indices in most stations exceed the Class 1 level according to GB12348-2008. Porous aluminum...

A low-carbon cement (LCC) consists of 10% of cement clinker and 90% of industrial wastes was prepared, properties of the LCC such as setting time, soundness, consistency, as well as the compressive and flexural strength were examined. It is shown that early strength of the cement was slightly lower,...

The lack of well test interpretation techniques applicable to chemical flooding reservoirs has restricted the formation evaluation and project design in EOR (Enhanced Oil Recovery) production. In this study, a two-phase five-component well test model for polymer-surfactant flooding is proposed which...

Viscous fingering phenomenon happens during CO2 flooding because of viscosity differences between CO2 and crude oil. It leads to premature breakthrough of displacement fluid and decrease of sweep efficiency. In this paper, a three dimensional Diffusion-Limited-Aggregation model based on pressure-oriented...

A novel hierarchical Fe3O4/TiO2 hollow microspheres were prepared by combining sol-gel process, hydrothermal etching technology, and high-temperature calcination. The microspheres displayed excellent performance in the photodegradation of methylene blue under visible light. The Fe3O4/TiO2-LiNO3 composite...

Nanoencapsulated n-octadecane with polyaniline shell as composite thermal energy storage material was synthesized using emulsion polymerization method. In this composite material, the n-octadecane was employed as the core material that is the latent heat storage phase change material (PCM), and the polyaniline...

Methyltrimethoxysilane (MTMS) was used as the precursor to prepare organically modified silica (ormosil) aerogel powder. The preparation was done in two steps. In the first step, MTMS was transformed into a gel through crosslinking by a small amount of sodium silicate, and the gel was broken into small...