In order to solve the problem of water-rich loess tunnel in construction process, the paper based on the idea of underground water environmental balance, use the Kuniaki Sato empirical formula and underground runoff modulus to build correlation function, get the permeability coefficient. Then we combine...

According the bridge 132 meters long tapered continuous curved box-girder bridge as the research object. Divide the continuous beam bridge models into vertical bending, pure torsion, lateral bending and longitudinal movement of the four sub-direction. Each energy of the vibration mode also divided into...

Due to their geometry, continuous curved bridge under gravity load will produce torque, which danger to bridge structure. In order to reduce the weight of load torque, with the method of asymmetric reinforcement, this paper introduces the three forms of prestressed reinforcement, through optimizing combination,...

The kinematic wave equation is selected to describe one-dimensional overland flow. The Lattice Boltzmann method which different from macroscopic numerical methods is introduce to solve this partial differential equation. By comparing to analytical solution, good fitting results are got. In addition,...

Microstructure and properties of Al-Mg-Si-Li alloys with different Mg content were investigated. The microstructure was observed by optical microscopy, the phases were determined by X-rays diffractometry, the hardness was monitored by Vickers, the mechanical properties were determined by tensile tester,...

As the problem of vehicle fuel consumption and environmental pollution has caused wide public concern over the recent years, improving vehicle fuel economy is extremely urgent. Through vehicle fuel consumption test on mini cars based on New European Driving Cycle (NEDC), the impact of energy-conserving...

The description based on the microscopic theory of sand fabric, the novel amplitude parameters decrypting the spatial arrangement of non-spherical particles is defined, and the verification with the microscopic test for Toyoura sand is conducted. The spatial arrangement of non-spherical particles form...

Aiming at the problems of disease and adverse geological section of peat soil, the entity test project, the settlement deformation law of peat soil roadbed is analyzed, and the theoretical calculation results and the actual monitoring results of test section compares the total longitudinal settlement....

A new application of high resolution continuum source flame atomic absorption spectrometry has been developed for the determination of Ca, Fe, Zn and Mn in chicken feed. Under the selected determination conditions, the correlation coefficients better than 0.998, the relative standard deviations less...

During the concrete pouring process, the long downtime would weaken the bonding strength between old and new concrete layers. The bonding parts would like to form horizontal cracks, especially winter intermittent surface in the severe cold region, of which cracks would easily propagates from surface...

The solidtosolvent ratio, ethanol concentration, extraction temperature and extraction time were investigated for extracting total flavonoids from wolfberry. The optimal conditions were found to be extracted at the ratio of material to solvent 1:20 (g/mL), 60 for 40 min with 70% (v/v) ethanol. The D101...

Based on Weijiadi mine No.2 cross-cut West water storage repairing engineering, through on-site investigation, theoretical analysis, FLAC numerical simulation, field tests and monitoring metheds to study The Supporting Technology for Repairing the Main Roadway in Mine under Complicated Conditions, the...

CFRP is widely used in the area of reinforcement because of its many advantages, but ordinary methods of past can not give full play to high-strength properties of CFRP.Therefore, new technology of concrete structures strengthened with prestressed CFRP emerges as the times require. At the same time,the...

As a renewable energy, ethanol from lignocellulosic biomass has developed technologically in many ways. Effective pretreatment can enhance the enzymatic saccharification of cellulose by removing lignin and hemicellulose from raw material. Different alkaline pretreatment technologies were studied to find...

In order to study the stress distribution features of the surrounding rocks a long the circle tunnel after the roadway excavated and the radius size of there leased circle, first analysis of the stress distribution characteristics of the surrounding rock, on this basis, circular tunnel for the elastic...

To reduce NOx emission, LnPW (Ln= La, Ce, Pr, Nd, Sm, Eu, Gd, Yb, Y; PW= PW12O40) were prepared and used for NOx adsorption and decomposition. The adsorption results showed that NOx adsorption capacity on LnPW were lower than phosphotungstic acid (HPW). After doping with HPW, the NOx adsorption ability...

Using microwave technology enhanced flocculation treatment of oilfield wastewater containing polymer .Chose the wastewater COD removal efficiency as an evaluation index, investigated four kinds of flocculants, such as AlCl3, FeCl3, PAC, PAF in the microwave irradiation and no microwave irradiation two...

As Jining City integrated gymnasium suspend-dome structure an example, the prestress tension process was carried out finite element simulation analysis by using inverse analysis of construction. The vertical displacement of the control joints and the top rod maximum stress ratio of roof were comparably...

FRP is new type of composite material which substitute for reinforcing steel bar in concrete structure and can solve wear problem caused by steel bar rusting.The result of its bond behavior with concrete is one of the key technologies for its popularization and application to reinforced concrete structure.We...

Using recoverable anchor cable is a good way to resolve problems about underground space occupation and waste of money . So the recoverable anchor cable applied in engineering has long and meaningful significance .this treatise uses the resistance to plucking of anchor cable in the certain unit dismantling...

A large number of coal-fired flue gas is the culprit that caused by air pollution and acid rain. Based on this reason, lime/limestone-gypsum wet flue gas desulfurization(FGD) process as the main desulfurization technology are used by most countries to control emissions of SO2,at the same time generating...

Aiming at the common asphalt pavement structure combination, large general finite element software is used to build the three-dimensional model based on the multi-layer elastic system theory. The pavement structure vertical displacement and stress are analyzed entirely under the even speed moving load....

Aiming at the common asphalt pavement structure combination, large general finite element software is used to build the three-dimensional model based on the multi-layer elastic system theory. The pavement structure vertical displacement and stress are analyzed entirely under the moving load. The results...

Horizontal driving machine (HDM) will directly affect the moderating effect of automobile seat, it is necessary to carry out quality inspection. This paper first puts forward the overall design of HDM test platform, then clamping devices are designed and a complete testing platform model is build

For the optically variable films series, using the boundary conditions of electromagnetic waves, we have given the propagation wave equation of S-polarized light wave in the optical variable film system with razor-thin metal film, which can be used to calculate electromagnetic field distribution and...

Considering the difference of phase-shift direction and amplitude attenuation direction when the optical wave propagates in conductive medium, with the boundary conditions of optical wave at the interface of the media, we derive the recurrence formula reflection coefficient for the S-polarized optical...

At present, rarely research is done about the loading process of cable net curtain wall with spring mechanism, therefore, how to select the spring stiffness at the cable end and what role the spring play in the process of loading become the very concern for curtain wall designers. Therefore, based on...

In the process of use, cold-formed thin-walled steel composite floor should undertake the upper floor vertical load, transfer wind load and seismic force to the shear wall, so that the composite floor must have good bearing capacity. However, using theoretical derivation to calculate the bearing capacity...

The post-construction settlement of soft soil subgrade is one of the main problems of railways and highways that troubling builders and designers. Reducing the post-construction settlement has a great significance. This article presents the treatment and precautions of design. Finally, it gives a brief...

Tunnel engineering is an important part of the development and utilization of underground space especially in the city. To alleviate traffic pressure, improve the efficiency of traffic greatly. This paper will use the numerical simulation software FLAC3D, to simulate the Subway tunnel excavation. Analysis...

In this paper, we investigate the oscillation of second-order half-linear neutral dynamic equations with distributed deviating arguments. By using the generalized Riccati transformation and the inequality technique, we establish some new oscillatory criteria for all solutions to second-order half-linear...

For the characteristics of that the center of mass and stiffness centre do not overlap and that presence of translational and torsional vibrations under earthquake to the eccentric structure, MRE damper is used to control the translation-torsion coupling effect of eccentric structure under seismic action....

It was investigated for statistical analysis on impact toughness of welded joints between B610CF and 16MnR steel using shielded metal arc welding (SMAW) and mixed gas arc welding (MGAW) method. Low temperature(-20 C) impact toughness experiments and normal temperature(20 C) impact toughness experiments...

Modern tram has been gradually applied to the public transportation in China due to its humanity, efficiency, ecology and environment-friendly. In the initial stage of development, however, nu-merous problems occurred in terms of function-orientation, route selection during initial imple-mentation, construction...

In order to solve the problem of autonomous dynamic control for unmanned surface vehicle (USV) under the unknown environment, the course and speed cooperative control method based on adaptive fuzzy algorithm is studied in this paper. A fuzzy control algorithm is designed of which the inputs are the deviation...

Composite wallboard will arise various problems of its surface quality which will affect the appearance as well as the durability of the composite wallboard if they are slight and influence the using function otherwise.This article mainly conducts systematically about the quality defects, get through...

The paper is aimed at the phenomenon of red clay subgrade disease,taking the subgrade filling from the Yuqing-Kaili Expressway as the research object,the soil mechanics as the theoretical foundation,the testing technology of geotechnical engineering as the method resrearched the change regulation of...

Sensitivity analysis as an alternative approach can take structural parameters as variable and achieve the relationship only with one time analysis. The study on frequency sensitivity of a transmission tower is actively carried out in this study. The three dimensional analytical model of a transmission...

Rock anchor foundation is an economy and advanced foundation form which is especially applica-ble for wind tower construction in mountain area. Installation of expansion anchor head at the bot-tom of full length grouted rock anchors can serve to reduce the anchorage length and increase pullout resistance...

In the study ,the coordination of GFRP rebar and concrete working performance are studied from two aspects of theory and experiment. By Making 9 groups of GFRP - concrete standard drawing specimen standard drawing and three groups of reinforced concrete specimen ,Getting the damage characteristics of...

Bracket has experienced vicissitudes for hundreds of years in Chinese traditional wooden architechture, so that the natural color on its surface had long been faded, however, the marvelous sculptures on it has always been suggesting that the lives of the ancients and it is the fantastic designs exquisite...

Running is the cantilever method is adopted in the study of the construction of continuous rigid frame bridge construction monitoring.The bridge with high pier and large cross-border, narrow bridge deck and other characteristics, high construction requirement and great technical difficulties.According...

Quality evaluation of bridges stopped building for a long period in highway extension projects is not only critical to re-recognize quality (precondition for follow-up construction) but to adopt treatment measures for bridges. Nevertheless, studies on this issue are quite few at home and abroad so far....

The delay precision of common detonator is not good, the actual time delay often have big difference with blasting design in real blasting engineering, and the blasting effect is difficult to control. While high precision digital detonators are instead of chemical drugs by original electronic control...

TCable system is an important part of the aircraft.As the plane "nervous system",cable system is the important role of carrying out electricity, assigned signal and transmission tasks,but also to provide contact information between each system control. The volume and weight of the cable is restricted...

In order to deeply understand the loading characteristics of the subway station and summarize the factors that influence the loading of the structure,we need to adopt the method of simulation to analyze the loading of the structure.The main structure static is simulated in ANSYS using an example of interchange...

In recent years, the complex high-rise buildings are increasing.The complex structure and transfi-nite structure often need to adopt the medium earthquake design. This paper first introduces the concept and design method of the medium earthquake design.Then,take a taransfinite frame shear wall structure...

At the two embedded solid depth, research on the displacement, bending moment and shear stress of micro-pile composite structure have been studied based on the FLAC3D program. Results show that: micro pile maximum bending moment occurs in the vicinity of the sliding surface, the maxi-mum shear stress...

According to the surrounding environment condition, the rock engineering site condition and the excavation depth, soil-nailing wall as its main form combining with the practical engineering case.the paper introduces the characteristics of the engineering and design soil-nailing wall excavation and check...

This article mainly analyses different representations of bridge seismic damage and their causes, discuss mostly the analytic means of bridge structures’ elastic-plastic earthquake response and the design method of ductile earthquake-resistance. In the end, the developing trends of the method in future...

In this paper the measured blast vibration signal of tunnel between Huaxin station and Huangmugang station of Shenzhen subway line 7 was analyzed, with blasting excavation way of benching tunneling construction method using different maximum charge of explosives. The peak vibration velocity and main...

In this paper, according to the principle of Hough transform, using the multi - directional image information of an object to calculate the pixel points of the object in the space, and get the real three-dimensional image from the object surface texture mapping which is composed of pixel points. This...

In mobile learning concept . In the first part, the reconstruction of the digital learning resources classification model is established, and then the the cloud based education platform "teacher student subject knowledge ontology" three-dimensional space application model based on. Finally, it designs...

According to the base theory of heat transfer, a thermodynamic for the permanent synchronous motor of hybrid electric vehicle was studied. The conception of temperature modulation factor was introduced; the temperature raise impacting the fundamental characteristics for motor was analyzed. Then the thermodynamic...

The nickel deposits of different microstructures were obtained by electroforming with abrasive-assisted, .The effects of friction strength on the surface morphology and the microstructures of the deposits were studied. The results indicate that the deposits with homogeneous microstructures were obtained...

As the most commonly used method in speed governor for marine diesel engine, PID control method is not very effective for nonlinear systems with big variation of parameters. To improve the dynamic precision of diesel speed governor, a fuzzy PID hybrid controller of parameter self-adjusting is put forward...

The high temperature heat pump water heater experiment of R1234ze was established, and the performance of water heater was studied on different conditions. The experimental results show that the water heater of R1234ze has shown good performance, which the discharge temperature is no more than 110 Cand...

Application of the Hydromechanics and the Momentum theorem, the driving critical velocity on wet pavement formula is established. It presents the tire-water-slope finite element modeling process. Through comparing the deformation rule of the loaded tire on horizontal ground and slope ground, analyses...

In this paper, 42.5 sulfate aluminate cement mixing pozzolan was used to prepare fast early strength concrete to reduce the application costs by the equivalent of cement, Pozzolan content, sand ratio, water-cement ratio investigated by orthogonal experiment method to seek meet with the strength requirements...

Application of ground polymer cementitious material can reduce resource consumption and environmental pollution. Chemical composition and polymerization mechanism were analyzed, in order to promote the research and application of the polymer materials. Technology principle of Isothermal conduction calorimetry,...

Recommended dosage and type of warm mix agent widely used at present were investigated in order to determine the technical performance of warm-mixed asphalt and its mixture. The warm-mix agent’s effect on asphalt performance were analyzed based on the three major indexes experiments of asphalt, and the...

In this paper, a modeling method of coordinated control object of supercritical power plant unit is studied. Combined with the actual operating history data of the power plant, by using experimental modeling method, this paper firstly gets the modeling structural according to the dynamic characteristics...

In order to get the engine simulation model used for the development of control strategy, the offline model and real-time model of self-developed gasoline engine by FAW of direct-injection turbocharging were built based on AMESim software. The results of simulation were compared with that of actual engine...

Spherical composite ribbed shell is made of thin reinforced concrete shell and composite ribs, which has many advantages such as large span, high rigidity, and large bearing capacity and low cost. It is one of the urgent issues to considering the mechanical performance under dynamic loading. Based on...

This work reports a new method of producing nanostructure arrays on monocrystal Si wafers. During the course of electrochemical anodic etching in HF solution, nanostructure arrays formed on N-type Si wafers under laser illumination ( =650nm). A field emitting scanning electronic microscope (FESEM) was...

An amphiphilic RAFT agent was synthesized, which could polymerize with monomers as Reversible Addition-Fragmentation Chain Transfer Polymerization route. The resulting RAFT agents were characterized by FT-IR and 1H NMR. The dispersing ability of synthesized RAFT agent was evaluated. Organic phthalocyanine...

The main body model of the tracked vehicle and the crawler system were established by RecurDyn/Track LM and Pro/E , and the assembly was completed in the RecurDyn environment. Using multi-body dynamics software RecurDyn with specific surface parameters for dynamic simulation, to obtain and analyze the...

This paper presents a new method of injection of high voltage pulses (IHVP) during commutation in order to shorten current’s rising-edge time and reduce the torque ripple. A quantitative method for choosing the voltage magnitude and the pulse width is put forward with trapezoidal back EMF under square...

Based on the analysis of structure and working principle of the vortex microbubble generator, the generator’s prototype is made and the experiment system is established by us. Under different working conditions the experimental researches on the performance have been done. A better working condition...

In this paper, a kind of rotary and building ridge combined work machine was designed and manufactured on a rice paddy production. The tractor was used and land rotary tillage and ridging were completed at the same time. It mainly consists of the traction frame, machine frame, gearing parts, rotary parts,...

Service composition, which can realize the added value of service, is the core to implement service oriented manufacturing system. The paper mainly studies the method of abstract service aggregation based on composable correlation drove by the user’s service request. First, the several related definitions...

For the flow control over a backward-facing step, two types of right-angle-shaped plasma actuators are specially designed with the electrodes connected in series and parallel manner, respectively. And this paper deals with the special design electrodes for avoiding the limited effects from the interaction...

Based on the model of coordinated control object, this paper firstly eliminates the strong coupling between the input and output variables using feedforward compensation decoupling method. The fuzzy adaptive PID controller, using the decoupled model, is designed and optimized for the main steam pressure...

During mining the high stress soft coal seam, usually adopted traditional method should leave large width coal pillar, which cause severe loss of coal resources, at the same time due to the system stiffness of the high stress soft rock roadway surrounding rock is very low, the plastic deformation is...

The emphasis of this paper is to study the high frequency dynamic characteristic of high-power transducer based on giant magnetostrictive material. A prototype of high-power magnetostrictive transducer using in kHz magnitude frequency situation is introduced. The accurate inductance relation in magnetostrictive...

With the increasing levels of automation, building of heating’s automatic level have a considerable development. So, quality of heating has been greatly improved. However, in actual operation remain exist extensive management. So, heating field need a heating quality evaluation system to evaluate the...

Background on modern safety monitoring of building maintenance equipment, the technology of ZigBee is applied. Steel wire rope monitoring system of window cleaning machine is researched in this paper. Its key question is to achieve low speed, low cost and low-power consumption. Star topology of wireless...

Macro-mechanical properties of wet concrete are important for concrete structure design because the pore saturation in concrete has great influence on the mechanical properties of concrete. The research states of macro-mechanical characteristics of wet concrete were introduced in the filed of tests and...

Critical for flanging of square tributary junction on cylindrical steel tube is to determine the shape and sizes of pre-machined hole. In order to investigate precise shape and sizes of the pre-machined hole, an optimized design model is established. The forming process during flanging is simulated with...

Detection method of colloidal gold immunochromatography assay concentration using colorimetric principle, when tested in liquid reagent on antigen and antibody response, reagent detection area change color, and compared to standard color grade then the concentration can be qualitative analysis. At present,...

Thin-walled cylindrical shells under axial compression are commonly found in a wide range of civil engineering steel shell structures, including silos, towers, chimneys and tanks. Buckling of axially compressed cylindrical shells has been one of the most active areas of shell buckling research. The purpose...

The uniform design is significantly different from other categories of costume design, and the uniform design is mainly based on the industrial characteristics and principles, i.e., the uniform must adequately reflect and adapt to the characteristics of work environment, object and target. While fabric...

In view of the current shortage of electric forklift hydraulic elevating mechanism, a new type of hybrid forklift elevating mechanism was proposed. The design calculation was executed according to the maximum load, elevating height, elevating speed and other related design parameters. At the same time,...

Route planning and optimization is significant for milk run system. Therefore, taking minimizing the transportation cost as objective, a route optimization model of milk run was developed. For the discreteness of solution, a discrete firefly algorithm based on bi-layer coding was proposed. Finally, through...

The formation of N-doped graphene (NG) use hydrothermal method with urea as reducing agent and nitrogen source. The surface elemental composition of the catalyst was analyzed through XPS, which showed the atomic ratio of N/C is 5.0%, indicative of the effective N-doping. The Au@Pt core-shell nanoparticles...

The plane strain fracture toughness KIC values of 2124 aluminum alloy plate of T-L and L-T orientation of thickness of 30 mm, 40 mm, and 50 mm were tested by using the standard compact tension specimen. The KIC anisotropic degree and mechanism of different thickness of 2124 aluminum alloy were studied...

Photovoltaic technology has been widely studied as one of the most promising new energy technologies around the world. The critical problem is, however, low conversion efficiency has hindered its development. This paper has analyzed effective factors to conversion efficiency in photovoltaic power system...

In view of design purpose on the welding robot of different tanks, The purpose of this research is to welding robot motion controller is applied to the tank cover, the system adopts solution of “PC + motion controller”. The paper analyses the selection of F28335 motion controller, Through the way of...

There are some new water-cooled ingot caster were built in some steel plant in China for produce large flat ingot to meet the increasing requirement of the large ingot. While as the ingots become larger, there may cause many metallurgical imperfections, such as segregation, surface defects, etc. For...

The blades are the key components of industrial steam turbine, and the manufacturing of the blade is about one third of total manufacturing. Reduction of the number of the blades is will lower the manufacturing cost. In the present paper, the aim of the research is to develop high efficient highly loaded...

The mechanism of combinatorial approach was reviewed first and then the passive mixers and active mixers for discovering new kinds of non-metallic materials by the use of combinatorial approach were introducted. By active or passive mixing, combinatorial approach was used to find close relatinship butween...

In this article, the volume average method of fluid flow in porous media is introduced and the unit volume resistance is analysed, then the Brinkman-Forchheimer extended Darcy model is obtained. Numerical results of fluid flow in porous media are solved, numerical results show that fluid flow in porous...

In this article, the porous media fluid flow experimental apparatus and five groups of solid particle parameters containing porous media are introduced. And the friction factor curve is drawn along with the change of Reynolds numbers according to the pressure drop-flow relationship. According to the...

Chlorine analyzer is broadly used for determination of residual chlorine or total chlorine in water. It is very important to evaluate its performance and needed to be calibrated by metrology organizations. But there is no standard or regulation for chlorine analyzer calibration in our country. The calibration...

Aiming at automobile gears, the three-level manufacturability evaluation system was proposed. The system includes the structural processing evaluation, the machinability evaluation of features and comprehensive evaluation. This paper mainly introduces the first and second level manufacturability evaluation....

Haze formation process and the reason were analyzed in the paper, and its harm to human health, particularly pollutants from thermal power industry was a key factor. In order to control the atmosphere environment worsen, and gradually improved the air quality, shorten time of the haze weather harm to...

This paper introduced an Antibacterial Carbon/silver film thermal fabric designed by using thermoprint and fitting technique,and introduced the base fabric selection Product specifications technological process process parameters and key technologies detailedly,then tested antibacterial property tear...

Shake table test is considered to be a very intuitive and efficient way of studying structure seismic response. With more long multi span bridges been built and a larger proportional scale structure tests are towards, the capacity of shake tables and table numbers are insufficient. Sacrifice has been...

Gravure printing machine Oven hot air dynamic performance and structural demensions directly affect the drying effect of print. In this paper, fluid mechanics is used to analyze kinematic and dynamic behavior of hot air flow in the oven of a gravure printing machine. The CFD method was adopted to do...