Aqueduct is a kind of overhead conveyance structure crossing the river, road, thrust, valley and so on. Analyzing the truss aqueduct and the cable-stayed aqueduct through model design, structure calculation and comparative analysis. Through the static load experiment, bearing quality of cable-stayed...

Recently, greenhouse effect caused by greenhouse gas emissions is becoming an increasingly heated topic. Developing a low-carbon economy is becoming a trend both abroad and at home. China is a main carbon emission country as well as the largest developing country. It is important to take prompt actions...

The dynamic mechanical response process of the projectile impacting on the recovery system was analyzed by numerical simulation method. The deformation and failure morphology of the recovery system under the impacting experiments, including deformation data at any time during the impact experiment, were...

The paper builds water quality assessment forecast model by adopting four algorithms which are decision tree, BP neural network, Logistic recursion and RBF neural network and analyzes the result. The forecast result shows that RBF neural network is the fittest method and its rate of accuracy is high...

This paper suggests that Natural condition and ecologic environment and spatial dimensions are the first important factor. Different kind of tourism resort locates at various districts with different characteristics of natural setting and ecologic environment within Sichuan Province, western China. Different...

An HPLC method to determine fluroxypyr esters was established. Methods The SinoChrom ODS-BP (5 m, 4.6mm×200mm) column was used. The mobile phase was consisted of methanol-water(volume ratio 85:15). The flow rate was 1.0mL/min. The column temperature was room temperature. The wavelength was 235nm. Results...

In order to price stock option better, it gets a new process of stock price which has a long correlation of binary tree based on classic financial random binary tree with no-arbitrage asset pricing model. We think investors drive the price of the stock and suppose that the premise of stock price which...

Under differentiated products and distinct cost condition, companies will not price at marginal cost, therefore they can achieve positive profits. Bertrand paradox can be solved to some extent. On the basis of price competition, companies can adopt price cooperation to improve their profit. With equal...

Aiming at correcting two-dimensional rotating-mirror’s reading in optical scanning or rotation,in this paper,a reading correction method based on optical transmission matrix is proposed. A mathematical model based on the measurement principle of two-dimensional turntable in the system is applied to get...

Calix[6]arene hydroxamic derivatives were synthesized by two steps using calix[6]arene, ethyl bromoacetate and hydroxylamine hydrochloride as the main raw materials, and were characterized by infrared spectroscopy. The extraction of U(VI) by calix[6]arene and its hydroxamic derivatives on various experimental...

Aiming at the problem of wastewater treatment system, the Navier-Stokes equations of incompressible flow were calculated by one-direction staggered grid method. The reason and inhibiting method of the unreasonable pressure field was dicussed in the article. The expressions of correction equations of...

Due to the phase modulation is more sensible to early local gear faults than the amplitude modulation. This paper proposed a new method using phase demodulation based on resonance band for early detection of gear tooth cracking fault. The proposed scheme based on the fact that gear tooth crack can excite...

SZ36-1 oil field is an offshore oilfield with serious lost circulation as well as formation damage. To avoid lost circulation and formation damage during workover in offshore oil fields, a novel multi-functional Fuzzy-Ball Workover Fluid (FBWF) was developed and used in well C22 and well F20 of SZ36-1...

In this paper we investigate the interrelation between the concentration of nutrients and the density of Chaetoceros and algae I (algae with appropriate external replenishment), we establish mathematic model to describe the dynamic evolution behaviors between the three; The stability state of material...

Reaction exothermicity over -alumina supported gold catalysts could be well controlled by addiing appropriate dopant. The addition of adopant FeOx and CeO2 could transfer active species Au0 to AuIII resulted in different reaction mechanism of CO oxidation in the absence and presence of H2.

The development of social economy puts forward higher demand for English personnel. Traditional college English teaching mode has low efficiency and leads to the deficiency of comprehensive ability for students. The scaffolding teaching method based on constructivism can improve the learning autonomy...

Optimization analysis on Electrical Insulation Performance was conducted using ANSYS soft for ITER axial insulation breaks. The optimal parameters of Li, and R have been achieved. The analysis results showed that the value of the maximal electric field in GFRP section is 3.396kV/mm. This position locates...

Steel reinforced recycled concrete as a kind of new environmental protection structure. The steel is arranged on the recycled concrete can make up for the defect of recycled concrete and can improve the loading ability of components. It has good mechanical properties so that attracted more and more attention...

This paper studies the model of ELID grinding material removal rate, proposes a new model of material removal rate and then conducts theoretical analysis and experimental verification. Studies show that the theoretical calculation results of the model and the actual measurement results are in good agreement,...

This document first determine LiaoShen regional old industrial relocation area soil type and the type of soil pollution, on the basis, comparing different foundation soil pollution treatment methods, confirmation has different processing methods according to different requirements.

The new process method of combining nylon brush roller grinding technology as agrinding and polishing with the grinding of high precesion, high efficiency, loe coast and other advantage, is a kind of processing method can be used in grinding process and objective, new abrasives used for new this procedure(nylon...

A new technology to obtain a fine-structured and high-toughness HAZ of HSLA steel for high heat input welding is developed using metallurgical thermodynamics, physical chemistry of metallurgy and material processing methods synthetically in this study. A kind of HSLA steel is designed in this experiment....

Using the oxide of high melting-point and high stability to pin the grain boundaries is an effective method to improve the welding performance of the HSLA steel in this study. A kind of HSLA steel is designed in this experiment. The thermal stability second phase particles which would not be dissolved...

A new technology to obtain a fine-structured and high-toughness HAZ of HSLA steel for high heat input welding is developed using metallurgical thermodynamics, physical chemistry of metallurgy and material processing methods synthetically in this study. A kind of HSLA steel is designed in this experiment....

The rapid development of the large steel structure brings a great opportunity for steelmaking industry. The steel plates not only have the strength and toughness but also can withstand the high energy input welding. Using the magnesium oxide of high melting-point and high stability to pin the grain boundaries...

For the international and environment pressure, it is urgent for China to reduce pollutant and greenhouse gases. One of the very useful method is to use clean energy. But for the complicated technology and high price of clean energy, it is very difficult for clean energy industry to self-commercialized....

The development of Internet technology promotes the growing popularity of Internet applications. The relatively free and open network environment makes mass communication pattern changed. Wide sources of information, fast speed of transmission and the boost of the public free speech cause the public...

It was found that aluminum foam material have sound insulation and absorption, electromagnetic shielding, anti explosion, anti bullet penetration, special high strength sandwich plate.etc. So the aluminum foam material can be used to manufacture carrier deck, light-weight and quick mounting bridge, the...

The fatigue performance study of high-strength engineering machinery steel is of great significance, as they often bear the reciprocating cycle load, which prone to fatigue fracture damage. Recently, the requirement of fatigue test of kinds of high grade steel is increasing rapidly. However, the existing...

This paper mainly focus on the principles and methods for measurement used in MTI (Motion Track Instrument) in an effort to study the feasibility of the inclusion of MTI in parameters measurement on human-rifle system. Focused on the fixation of MTI on the rifle and the motion features of human-rifle...

As the aluminum alloy car body was used to the lightweight design of railway vehicle, the fatigue reliability has become a key issue. In order to analyze the fatigue strength of aluminum alloy car body, the Goodman fatigue limit diagram was drawn according to the mechanical characteristics of aluminum...

Solution heat treatment and subsequent precipitation aging operations of Ti-6Al-4V alloy were conducted, and erichsen test was performed. Detailed microstructure was carefully observed by light optical microscopy (LOM). Influence of heat treatment on hot-rolled sheet forming of Ti-6Al-4V alloy was investigated....

In this paper, Ti-6Al-4V alloy was water cooled from three different temperatures after solution treating. The microstructure of the specimens after thermomechanical treatment testing was observed by light optical microscopy (LOM) and scanning electron microscopy (SEM), respectively. The hardness of...

In this paper, the acicular ferrite nucleation induced by inclusions in pipeline steel welding heat affected zone is researched, including the acicular ferrite nucleation induced by the in-situ reaction inclusions, the acicular ferrite nucleation induced by the formed inclusions after the micro-alloying...

In this paper, the HAZ of pipeline steel in high heat input welding is researched, including the microstructure and properties of HAZ, the embrittlement of HAZ and the existing problems and solutions of HAZ. The results show that the welding normalized zone is the best part of the HAZ. The main embrittlement...

The characteristic of chemical composition of X80 pipeline steel, the microstructure and the existing problems under the condition of high heat input welding were introduced in this paper. The micro-alloyed process of Nb, Ti, V elements in X80 pipeline steel and the influence on the mechanical properties...

A blue phosphorescent cavity organic light-emitting Devices (MOLED) is obtained. The structure is Glass/DBR /ITO /MoO3(1nm)/TcTa(40 nm)/CBP: FIRPIC( 30nm, 6%)/TPBI(35nm)/LiF(1nm)/Al(80nm). For comparing, the OLED without cavity is also fabricated. The effect of microcavity structure on phosphorescent...

Poly(methyl methacrylate) thin films were prepared through solvent casting method followed by thermal treatment to completely remove the residual solvent. All three different tactic PMMAs were studied; the PMMA solution was made in chloroform at various concentrations, with 0.1wt% QDs added against the...

The process bogie is a special equipment for bullet train maintenance. Frame is the main the main load-bearing frame in the process bogie, and its fatigue strength directly affects the safety performance of the entire process bogie. According to the actual maintenance needs, the project design a process...

Two stainless steel bolts of the motor components assembly fractured after serving for eight hours. The fracture feature and cause of the bolt were analyzed by appearance observation, micro and macro observation on fracture surfaces, metallographic examination, hardness testing. The results show that...

Plasma process was carried out on ZK60 Mg alloy to explore the effects of different negative voltage on the characteristics of coatings. Surface and cross-section morphologies, coating thickness and corrosion resistance of coatings were investigated by scanning electron microscopy (SEM), energy disperse...

Fiber metal laminates (FMLs) are hybrid structures consisting of metal sheets and fiber reinforced plastic layers. Glass reinforced aluminum laminates (GLARE) reflects the combination of aluminum alloy layers and glass fiber reinforced layers. It is utilized in the aircraft upper fuselage and the leading...

In this work, effects of Ethylene-vinyl acetate copolymer (EVA) and Dicumyl peroxide (DCP) on injection molding of recycled polyethylene (PE) materials obtained from a waste disposable drip tape are studied. Under injected at 175-230°C and 35-40 MPa, the recycled PE materials with EVA showed good injection...

Based on the characteristic distortion and the influence factors of cone parts by cold extrusion, cold extrusion process of a center hole conical part is simulated by Abaqus software, then the shape of the hole generatrix after cold extrusion is obtained by this method. According to simulation, the relation...

Based on the finite element analysis software Pamstamp, the box-shaped parts deep drawing process of 2B06-O aluminum alloy is simulated analysis. By comparing die corner radius and blank holder force of the box-shaped parts, a reasonable determination of the die corner radius and blank holder force are...

Additives, printing ink and other chemicals in packaging may influence safety of the food. Standard solutions of eight organic compounds were prepared. By gas chromatography and mass spectrometry technology, benzene, isopropyl alcohol, ethyl acetate, ethyl benzene, cyclohexanone, m/p-Xylene, o-Xylene...

Through research and analysis about smart home, a smart home system based on service encapsulation and equipment abstract solutions have been proposed. It’s combining pervasive computing and mobile computing technique centered on home intelligent gateway, through the device abstract and service encapsulation...

With self-developed pulse weld device, stainless steel 1Cr18Ni9Ti is pulse welding repaired under three different conditions. Metallographic specimens are prepared respectively. Metallographic observation results show that the size of pores in the fusion zone and the pulse weld layer increases along...

Commercial cutting tools of sintered high speed steel and carbide were used to heavy milling 6N01-T5 aluminum thin-walled hollow W-shape structures under four kinds of cooling conditions. The results showed that the cutting forces increased dramatically when cutting the weld seam or the intersectant...

After nanguo pear respectively were dealt with water to wash, base paper packaging and nano-TiO2/chitosan coated antibacterial paper packaging, and stored for some time, its sensory index and physiological index were measured and made comparative analysis. The determination results based on sensory index...

Porous silicon (PS) with 6.13 nm average pore diameter, 20.6 m thickness layer and 70.8% porosity prepared by galvanostatic electrochemical anodisation of p-type silicon wafer in aqueous hydrofluoric acid (HF)/ethanol electrolyte. The freshly prepared PS was processed by time effect, nitric acid treatment,...

The continuous ECAE forming process of Al–Zr resistant heat alloy was simulated by nite element method with DEFORM-3D.The rigid viscoplastic finite element model of continuous ECAE forming process was established. The feasibility of continuous ECAE forming process was verified. The effective stress and...

In this paper, the ABAQUS finite element model is established. using the stress distribution of the components during the calculation analysis, we analyzed the working mechanism of steel pipe steel reinforced concrete composite column shear components, it is concluded that P - U curve of the shear component...

The nonlinear optics is a new and important branch in the field of optical physics. Compared with the traditional optics, the nonlinear optics can produce many special phenomena such as frequency doubling, optical limiting, two-photon absorption and so on. Therefore, it has great potential for application...

High silicon content silicone-acrylate block copolymerization emulsion by vinyltriethoxysilane acrylate(VTS), octamethylcyclotetrasiloxane(D4) and acrylic ester was synthesized in this paper. About 20wt% silicon gave the latex film characteristic of rubber by the study on the resilience and tensile curve...

A type of connection was proposed to connect buckling restrained braces in reinforced concrete frames. Performance under Monotonic load of the joint were analyzed by ABAQUS, the development of cracks and deformations is studied, and the ultimate state and the failure mode are determined. In addition,...

SAPH440 and Q235 these two materials are automotive sheet metal,through the experiment on mechanical properties, microstructure and bulge forming ability have a comparative study between them. The experimental results showed that: SAPH440 mechanical performance is better than that of Q235,it has small,...

Nanoparticles filled silicone rubber is widely used in electric encapsulation for its excellent insulating properties, thermal and optical stability. This paper focuses on the effect of nano-Al2O3 on the properties of phenyl silicone rubber at low loading ( 1%). Nano-Al2O3 was modified by silane coupling...

In this study, unbalanced magnetron sputtering approach was used to prepare SiC film by using high-purity Si target. SiCO films were synthesized by reactive radio-frequency sputtering from a SiC target with oxygen gas. Nano-indentation and scratch test were used to study the mechanical properties of...

In this paper, Cd2+ was absorbed by the carboxylated bagasse hemicellulose, and the kinetics has been studied. The results show that absorption of the carboxylated bagasse hemicelluloses to ions Cd2+ can be well described by the pseudo second-order kinetics model. The theoretical value of the maximum...

A finite element model was developed to study the damage mechanisms of composite laminates under high velocity impact conditions. Modified Hashin failure criteria were used for the fiber breakage prediction. Cohesive elements were defined between two adjacent layers in the target laminate for the prediction...

In order to reduce head injury in the collision between pedestrian and vehicle, and explore a variety of influence factors of laminated glass on the impact injury. Several laminated glass impact damage effect factors are considered to establish a series of simulation models, crash simulation calculations...

A numerical tee joint valve model was set up in this paper. The numerical forming simulation was implemented. The load of the upper punch was predicted. The final temperature field shows that varying temperatures are within the feasible forging temperature region. The results from the numerical simulation...

When the replacement of cement and fly ash strength 28d 3d have the same amount of 10% of the rise. Experimental Comparison of mechanical properties of fly ash by different grinding time when grinding 15min replace an equal amount of 10% of cement, mortar best. And draw 15min when grinding through microscopic...

The traditional reinforcement method of highway tunnel lining crack is difficulft to constuct and brings about structure damage. The reinforcement method of new steel strip with carbon fiber and crack perfusion not only constructs simply, but also brings less destruction to the lining structure and has...

To enhance the utilization rate of wind energy, introduce a new kind of Movable Wind-drive Device and research the influence of crosswind on aerodynamic performance of wind turbine in wind-drive device. Based on blade coordinate system and feline coordinate system, carry on a vector decomposition of...