The triaxial compressive strength of medium-grained sandstone after different high temperature about on 25 400 800 and 1000 be researched by the servo-controlled testing machine RMT-150B. The test results show that: (1) it is still a strong liner relationship between the triaxial compressive strength...

In this paper, Rare earth (La, Eu, Sm) hydroxide nanorods have been prepared by facile hydrothermal treatment of the corresponding bulk oxide powders. The obtained samples were characterized in detail by scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and transmission electron microscopy...

There are many factors can determine the module of gear. One of the most important is the strength of the gear noise and quality. Reduce the modulus, increase the tooth width can make the reduction of noise and can reduce the quality of the transmission conversely. This paper is based on the dynamic...

Using maleic anhydride as raw material, sodium tungstate as catalyst, hydrogen peroxide as oxidizing agent, calcium hydroxide as initiator, the synthesis conditions of the best scale inhibition performance of poly epoxy succinic acid were studied by using the method of polymerization: maleic anhydride...

In this paper, it is established the model of air-conditioning system and a simplified model of cooling system in the vehicle. That model is based on the test data. One-dimensional model has been corrected by the three-dimensional calculation results. Therefore, the one-dimensional model also reflects...

Structural features of enzymatic hydrolysis lignin from the corn stalks and furfural residue was compared with lignin extracted from paper-making black liquid (PBL). Lignin was characterized by FT-IR, GPC, 13C- and 1H- NMR analysis. Enzymatic hydrolysis lignin from the corn stalks (CS) had a 12.2% higher...

In order to study the effect of water on the rock compressive strength, mechanical data for different water content of siltstone uniaxial loading process are analyzed, the results show that: 1) siltstone compressive strength decreases as the water content is increased, the damage of water to siltstone...

Reinforcement corrosion in concrete is an important factor that affects the durability of reinforced concrete structures. In marine environment, especially, non-longitudinal cracks accelerate the intrusion of chloride ions into the concrete structure. Chloride ions destroy the passive film on the surface...

Bottom water coning is the main problem in the development of bottom water reservoirs and barrier layer in these reservoirs can control bottom water coning in some degree, so the research of the effect of barrier layer in bottom water reservoirs is carried out. This paper, in streamline simulation method,...

With pineapple leaf fiber as the raw material, refined dry jute is obtained through refined processing, which is blended with cotton to trail-produce 30S pineapple leaf fiber/cotton (30/70) blended yarn. Through the combination of industry, university and research and by cooperating with the textile...

By means of ABAQUS, the numerical model of grouting-sleeve reinforcement-connection component under the action of axial tension load was established, and the influence of grouting- material compressive-strength on the stress distribution, the displacement distribution at grouting- material, reinforcement...

The flotation separation behaviours of mercury (II) by sodium chloride-potassium iodide-octadecyl trimethyl ammonium chloride system were studied.The effects of different parameters,such as the dosages of KI and octadecyl trimethyl ammonium chloride(OTMAC),vari- ous salts and acidity etc. on the flotation...

An experiment is carried out to simulate siltstone tunnel water inrush with both the water pressure and no water pressure by biaxial rigid servo-controlled system. The PCI-2 acoustic emission(AE) system produced by American physical acoustics corporation is used to collect data of the AE in the process...

By means of finite element software ABAQUS, the numerical model of grouting-sleeve reinforcement-connection component under the action of axial load was established. Two kinds of loading system were considered, one was axial tension load with constant loading rate, and another was unidirectional cyclic...

A new ash grinding process was proposed,with the application of vertical grinding mill systems to grinding,sorting,and collection process The process by designing a new type of vertical grinding system to solve the small particles of fly ash in the state is not easy grinding problem,significantly reducing...

In order to plug water channeling of fractured tight oil reservoir, a new type of copolymer as the main agent is used for deep profile control and oil displacement. This copolymer is synthesized with modified cellulose and acrylamide, which has relatively lower viscosity and can meet the requirements...

Reactive molecular dynamics simulations (MD) have been performed to investigate how the decomposition of bulk Cyclotrimethylenetrinitramine (RDX) is affected by electrical field. The rate of RDX molecules loss with time and time evolution of the total populations of various key molecules were evaluated...

Al/Pb-0.8%Ag and Al/Pb-0.75%Ag-0.03%Co anodes were successfully obtained by electrodeposition from methanesulfonic acid. The relation of silver content(y/m%×104) in Pb-Ag coatings and Ag+ concentration(x/mgdm-3) of electrolyte was . The results of anode polarization curves and Time-Potential curves showed...

The red clay has high moisture content,high plasticity,high void ratio and other special engineering properties,especially when the subgrade surface dehydrates,it shrinks and cracks,caused the subgrade to have some diseases.Taking the subgrade filling from the Liupanshui inner Expressway as the research...

In this study, a new bi-layered silk fibroin (SF)/ chitosan (CS) wound dressing was investigated. The morphology, cytocompatibility and effect on open wound healing in rats were studied. The results show that the SF/CS wound dressing has homogeneous porous structure and support the attachment and proliferation...

Study the effects of diesel engine emission characteristics with different adding proportions of ethanol on a DI diesel engine. The results show that with the increasing of ethanol blending proportions, the diesel exhaust gas decreases with the addition of ethanol, the emission of NOX also reduces significantly,...

With the rapid development of power transmission and transformation projects in China, steel supporting structure has already became the most popular structural form for these structures, and high-strength steel (normally means the steel with the nominal yield strength in the scope of 460MPa and 1100MPa)...

The event that some lightning rod was fractured and collapsed at the tubular joint of lightning rod occurred in some transformer substation recently. The mechanical property of the tubular joint of lightning rod and frame column for transformer substation was analyzed in this paper based on the structural...

The event that some lightning rod was fractured and collapsed at the tubular joint of lightning rod occurred in some transformer substation recently. The stress concentration at the tubular joint area was the main reason which caused this failure. This paper proposed the solution to recover the collapsed...

General petroleum asphalt is a common inexpensive impermeability of waterproof material, but its some performance limits its development. In order to make up for the defect and reduce the cost,we discussed the preparation of waterproof coating made of petroleum asphalt which is modified by BRA in this...

Tight oil and gas reservoir have a huge reserve all over the world. The shape and distribution of fractures in tight formation are the key contributors to high-efficient exploitation. An effective description of fractures is significant and fundamental for the study of fractures in tight reservoirs....

Viscoelastic properties is an important indicator to characterize the mechanical properties of materials, due to join a large number of crumb rubber makes viscoelastic properties of rubber asphalt are very different from other types of asphalt. In this paper, through theoretical analysis and Laplace...

In this paper, the immune adsorbents were prepared for adsorption of aflatoxin M1 in milk. The copolymerization of glyceryl methacrylate (GMA) and methyl methacrylate (MMA) microspheres were prepared using dispersion polymerization with azodiisobutyronitrile (AIBN) as initiator in ethanol-aqueous medium...

This paper conducts a study on the detection method of common antibiotics ofloxacin(OFL) in different water. With high performance liquid chromatography- diode array detector(HPLC-DAD) as the detecting method, the chromatographic detection condition and pretreatment method of the samples are in the study...

Ceramic Insulator is an important part of the electric power equipment.When the deposition of pollutant in the air contamination environment is serious, the uniform distribution of voltage in the ceramic insulator bunch will be changed in the real working environment and leads to an accident. This paper...

Seismic design of underground structures is an important part in earthquake engineering. Numerous simplified calculation methods have been raised in the seismic design of horizontal structures. According to the Chinese code in the seismic design of subway structure which was put forward 2014, it is crucial...

This paper presents the analyses of the influence of the weak layers on the excavation-induced deformation in the sub-sea tunnel. The finite element software ABAQUS is adopted to investigate the stability of the surrounding rock in the case of inclined weak layers with various angles, and the stress...

High pressure mercury and nitrogen adsorption had been conducted on outcrop and core samples for studying the pore structure characteristics about shale in eastern uplift of Liaohe depression. The results showed that: The pores mainly are nano-scale and irregular in size and arrangement. The nitrogen...

The discharge of wastewater which contains dyes, represents serious environmental problem and receives public health concern. It has become a big challenge to degrade and mineralize these dyes. Advanced oxidation processes (AOPs), based on the production of hydroxide radicals are effective methods to...

According to the telescoping tube failure problems, and the drainage vehicle displacement is 3000 m3/h, T-shaped inflatable sealing ring parameters were analyzed. Using the finite element software ANSYS to build numerical simulation models. Sealing performance under different inflatable pressures, different...

A survey on hexapod walking robots and gait planning is presented. For the discrete landing points, the redundant DOF of legs and the impending body, the performance of hexapod walking robots is better than wheeled robots and tracked robots. The prototypes of hexapod walking robots and its up-to-date...

This paper introduces design of mix proportion of recycled Micro-surfacing technology mixing with a certain amount of Recycled Asphalt Mixture referred to as the RAP and its application in preventive maintenance for Yunnan Yong wu highway.

During the process of natural gas hydrate drilling, hydrate cuttings will decompose at a certain position, which promotes the formation of complex multiphase flow in annulus. Aiming at this, dynamic model of hydrate mass transfer decomposition is established considering temperature and pressure. On the...

The article studied the influence of pH to the gelling properties and stability of HPAM/Cr3+, the results shows that the alkaline environment could promote the gelation rate and strength. The gelation rate can be lifted properly by increasing the pH value. The HPAM/Cr3+ which exist in the alkaline has...

Fractured horizontal wells are widely applied in the development of tight reservoirs nowadays, which will stimulate the seepage zone, reduce resistance near the wellbore and increase productivity. Through analyzing all factors affecting fracturing development effectiveness, select the key factors, and...

Analysis of design methods of humidity regime for multilayered wall structures based on cellular autoclave composites is realized. Relevance of arrange of study of cellular composite work humidity is proved. Experimental studies were curried up as well as results of sorption wetting and water vapor transmission...

The Middle Submember of Member Three of Shahejie Formation of Paleogene (Es3~Z Member) in the west of Niuzhuang Sub-sag of Shengli Oil Field is the research object of this article. In this article, the porosity and permeability of the Es3~Z Member are statistically analyzed and calculated from well sampling...

In order to analyze the bearing capacity of monopile foundation and elevated pile foundation for offshore wind turbines, models were established using finite element analysis software Abaqus and design software FDOW. Bearing capacities of the monopile foundation and elevated pile foundation were compared...

Titanium dioxide (TiO2) photocatalyst and diatomite adsorbent were made into a paper-like composite by a papermaking technique using pulp and ceramic fibers as sheet matrix. Simulated wastewaters that contain methylene blue (MB) bleached in photocatalytic TiO2-diatomite sheet was investigated under UV...

The paper studied formaldehyde emission (FE) of E0 class blockboards by desiccator and gas analysis method. Results showed that for the same formaldehyde emission value got from desiccator method, the gas analysis (GA) values were quite different. It was suggested to use gas analysis method to evaluate...

In order to investigate the effect of ultra-fine smash on the separation results of Shenfu semi-coke, the impact crusher was used to explore the relation between the degree of dissociation and the particle size and ash content. Additionally, the operating parameters of separation device of impact crusher...

The purpose of the paper was to test the floc performance in the process of flocculation by applying to the micro eddy water purification technology and machine vision floc-line detection methods. During the tests, the experiment consisted of detecting the flocs equivalent characteristics such as the...

as the global resources is increasingly scarce and the environment is worse, people put forward the higher request for building materials and environmental protection. And bamboo is economy ,renewable and environmental protection. Apply bamboo instead of steel to concrete plate, increase the hollow rate...

After adding passivators in corrosive sulfur-containing transformers, conducted follow-up research and monitoring on the effectiveness and comsumption of passivator, and monitor the quality of transformer oil after adding passivator, which aims to provide a reference for the operational monitoring after...

The article study the effect and different conditions of degradation phenol in waster water samples via Ultrasound (US), H2O2, fenton reagents oxidation technology. Experiments show that the degradation of phenol only use of single US or H2O2 treatment is not ideal while US used in conjunction with Fenton...

According to the mechanical defects of polypropylene (PP), we blended modification of PP with calcium carbonate (CaCO3). We used the blends of CaCO3 and PP as the research object to test the mechanical properties of CaCO3/PP composite materials with different proportions and studied the influence that...

Yellow River reservoir water, which is slightly polluted and owns a high content of suspended particles, is studied as raw water in this paper. Online particle counting instrument is used to detect and track the particle content of raw water. Potassium permanganate pre-oxidation process combined with...

The probabilistic restitution model was adopted by fitting probability functions with Gauss-Hermite method for the integral inlet separator particle trajectory simulation compared with deterministic restitution model and elastic collision model. Result shows that the above three bounce models perform...

Mesoporous silica FDU-12 with different morphologies has been successfully hydrothermal synthesized under static or stirring conditions by changing the water-bath temperature. The as-synthesized materials were characterized by X-ray powder diffraction(XRD), N2 adsorption-desorption, scanning electron...

Most of marine diesel engine faults is caused by the wear. So, wear analysis is particularly important. In this paper, we have got the wear state and wear mechanism of the marine Cummins diesel engine by analyzing the selection of two typical oil sample with the oil ferrography analysis technology, and...

This paper presents the current researches about temperature profiles in multilayered flexible. The measurement methods of temperature profiles to the prediction model for temperature distribution in pavement structures are summarized and discussed. The temperature influence on bearing capability and...

Warm Mix Asphalt is a new type of asphalt mixture which can reduces the mixing temperature and emissions. A kind of warm agent (LRT) is chosen in this study. Hot and warm mix asphalt mixture were designed and their high temperature, low temperature, moisture sensitivity and fatigue pavement performance...

Shengli lignite (SL) was thermal dissolved (TD) in a toluene/ethanol mixed solvent and the dissolved matters was further analyzed with gas chromatography/mass spectrometry (GC/MS). 15 arenes were detected and their structure were identified by GC/MS. The analysis of these high-valued arenes from soluble...

Shale gas reservoirs have become the focus of considerable attention as primary energy resource over the past decades worldwide. Numerical modeling technique plays a critical role in providing the essential tools for evaluating and managing the development of such complex systems. Gas flow in shale formation...

To master internal performance and design method of 2D-CD nozzle,the internal performance of 2D-CD nozzle was investigated by numerical simulation method.The influence of circular-to-rectangular transition duct outlet area to inlet area ratio and circular-to-rectangular transition duct length on the...

In this paper the whole design method of an integrated bump inlet with an S-shape diffuser at its design Mach number 1.7 is presented. The model of the intake system with airframe is established based on the aircraft's flight task requirements. Then CFD analysis result indicates the low-momentum boundary...

A series of numerical simulations had been conducted on nozzles with different divergent geometrical parameters, and each nozzle’s flow field had been simulated under different working conditions. The effects of divergent angle and divergent wall length on nozzle performance had been analyzed. The results...

A rapid nozzle performance analysis methodology and project for two-dimensional convergent-divergent nozzle have been developed. A one-dimensional isentropic flow model is employed to calculate the parameters of nozzle internal flow field. And the skin friction coefficient is used to correct the non-isentropic...

With middlings of TBS underflow from Shanxi serving as sample, recleaning experimental study was conducted in order to improve the recovery of coke. Lab single-cell flotator was used as the main separation device. The ash content of sample was 17.84%, collecting agent dosage and pulp density were separately...

For the problem that prediction of coal ash fusion characteristics of blending coals for gasification,using genetic algorithm (GA) to optimize BP neural network on two aspects. Firstly, optimizing hidden layer nodes by binary coding,and getting the best optimal topology of network.Then using real encoding...

Reactor pressure vessel (RPV) is exposed to deadweight, pressure, heat expansion, seismic load, pipe loads and etc under operating , accident and hydrostatic test conditions. Due to geometric discontinuity, the nozzle belt is reluctant to stress concentration, which is the key part in structure analysis....

In this work, chitosan/graphene/TiO2 (CS/GR/TiO2) composites for the removal of Cr(VI) was prepared and characterized by FT-IR, XRD, Raman spectroscopy, TEM, SEM and N2 adsorption-desorption measurements. The composites could retain large specific surface area of graphene, the mesoporous structure of...

This paper presents the preparation for phase change materials(PCM) with different phase change temperature for use in refrigerated transport equipment. The optimal preparation condition of HSD-1 as the PCM was confirmed. The thermo-physical properties of the modified HSD-1 were investigated by cooling...

Waste rock and tailings of a mine generate acid mine drainage due to oxidization during long-term stacking, and this may cause serious harm to the environment. 1-year-old, 5-year-old, 10-year-old and 20-year-old waste rock of Dexing Copper Mine are chosen in the experiment for acid generation research....

For further research on microscopic pore characteristics and its geological accumulation significance of coal bed, coal samples from drilling holes of Baode, Shanxi province in China were collected to perform scanning electron microscopy (SEM), mercury injection and low-temperature nitrogen sorption-desorption...

Three commercial wood activated carbons for air purification were selected for static adsorption/desorption of formaldehyde. The influence of the pore structure, surface functional groups and particle size of the activated carbon on the static adsorption of formaldehyde, and temperature on the desorption...

In order to analyze the relationship between structural characteristics and toxicity of aniline and phenolic compounds in leather chemicals, the molecular connectivity indices, the molecular shape indices, electrical topology status relationship indices and electrical distance vectors of 36 kinds of...

To ensure wheel body of the hoisting sheave strength and stability condition. For the purpose of wheel body lightweighting. There are two schemes to reduce body weight.Reduce the spokes at the same time increase the ring stiffened plate, and reduce the spokes at the same time change the spokes width...

Using three-dimensional simulation software AVL FIRE establish a direct injection diesel model.Analyzes the effects of water content of emulsified diesel on the combustion progress of diesel engine.The results showed that with the diesel water content increasing, the maximum cylinder pressure generally...

Natural gas is a vital component of the world's supply of energy and a clear energy. Underground natural gas storages are underground facilities for storing natural gas. Optimization on tubing sizes for preventing corrosion in underground natural gas storage well is mainly to prevent erosion. In order...

The changes of underwater level have great impacts on the seepage field and the stability of reservoir landslide. The permeability coefficient is the principal factor that impacts on the changes of underwater. Based on the landslide in Three Gorges Reservoir area, the computing model was established...

The reservoir landslide stability is closely related to the fluctuation of reservoir level. The main influence factors are fluctuation rate and permeability of landslides. The landslide was chosen as the research object in the three gorges reservoir area, and studied the changing characteristics of stability...

The buried pipeline leakage has tremendous impact on the surrounding environment, while crude oil migration and residues of contaminants in the soil porous media law is an important basis for the detection and elimination Considering the characteristics of oil multiphase flow in porous media, we establish...

Purpose To establish a practical, fast and accurate identification method of tortoise shell, falsify amplified polymorphism DNA (RAPD) randomly and provide reliable basis for identification of tortoise shell. Method We use the Alkali cracking method to extract mitochondrial DNA from the tortoise shell...

The Third mining area 33073 roadway of Zhaozhuang Coal Mine is a large section and broken coal roadway, after tunnel excavation, the emergence of large deformation surrounding rock phenomenon. By using simulation software roadway FLAC3D original support scheme simulation analysis, we found the original...

Ground stress is the most primary stress in earth's crust and not disturbed by engineering. In underground engineering, the fundamental cause of the deformation of surrounding rock is the influence of ground stress after the roadway excavation. Ground stress testing can provide basic design parameters...

Hongyuan Coal Mine belongs to low gas permeability coal seam, its permeability coefficient is lower than 0.1m2/(MPa•d), so the gas extraction will be difficult to do and the efficiency of extraction will be low, underground gas extraction has been using polyurethane to seal hole and this method exits...

The traditional lacquer technology is a kind of crafts, by taking plant paint as raw material, using a variety of techniques to protect and decorate the object surface. The plant paint has the characteristic of environmental protection, pollution-free and renewal, and its material advantages can not...