This paper establishes the stratosphere propeller geometry model, using Pointwise software to generate grid structured grid. The flow field of the propeller at the altitude of H=20km in different wind speed and different rotate speed are simulated using the software FLUENT. The SST turbulence model and...

In order to find out the influence to fault based on fully-mechanized sublevel caving of thick coal seam, the software UDEC was used to establish the numerical model. The measuring points were arrangeed on the coal seam roof every 100m to monitor the relative displacement of upper wall and footwall under...

The perovskite cathode material of SrFe0.9Sb0.1O3- (SFS) was prepared by glycine-nitrate process (GNP). The SFS oxides sintered at 1150,1200 and 1250 §C for 10 h were crystallized into a single phase perovskite structure, respectively. The effect of sintering temperature on crystal structure, conductivity...

Dietary fiber obtained from mango peel (MPDF) by fermentation with lactic acid bacteria and ultrafine grinding was treated by dynamic high-pressure homogenization (DHPH). And the effect of DHPH conditions on composition and physicochemical properties of mango peel dietary fiber was investigated by determining...

In this paper, the influence of serial resistance Rs and shunt resistance Rsh for PV cells are studied. The series resistance Rs has a great influence on the output characteristics of the PV cells. Therefore, it is particularly important to solve the value of Rs for the model of solar cells. Rsh is very...

A pot experiment was carried out to study the effects of exogenous abscisic acid (ABA) on the resistance of Capsella bursa-pastoris under salt stress. Spraying ABA increased the root, stem, leaf and shoot biomasses of C. bursa-pastoris under salt stress. ABA applications also enhanced the plant height...

A pot experiment was carried out to study the effects of exogenous abscisic acid (ABA) on the photosynthesis of Capsella bursa-pastoris under salt stress. Under salt stress, the chlorophyll a, chlorophyll b and total chlorophyll contents of C. bursa-pastoris showed no obvious changes at low ABA concentrations...

Nonlinear transformation between the isoparametric and the Cartesian coordinates may make the elements more sensitive to mesh distortion. By using the second kind of quadrilateral coordinate method QACM-II, which can keep the transformation always linear between the area and the Cartesian coordinate...

Additional displacement fields based on internal parameters were used widely in finite element method to increase the order and complementary of displacement polynomials, thus accuracy and insensitivity to mesh distortion of elements can be improved significantly. To ensure that the element could pass...

In the frozen area, the freeze-thaw cycle may lead to the separation of the concrete spray and the slope in the spray anchor structure, resulting in failure of the spray anchor structure.In this paper, the gravity of the spray layer itself is decomposed by the force equivalence principle and the Saint-Venant...

Many concrete shear walls are always subjected to high gravitational loads and prone to brittle shear failure under the lateral seismic loading which probably leads to the collapse of the whole shear walls system. This paper aims to present a new method of using slit steel plates to retrofit reinforced...

Biological enzyme is a new type of soil reinforcement material, it is based on biological enzymes curing agent to achieve. As a biological enzyme reinforcement material, its greatest advantage is no pollution to the environment, but also to ensure good mechanical and road performance. In order to study...

The application of energy-saving materials in construction should maximize the conservation of resources, minimize the impact of the environment, health and comfort oriented, to achieve "people, nature, construction" of the three harmonious unity of the building. In this paper, the application and development...

China's current green building materials management is imperfect, there are still many shortcomings. Actively building green building materials management system based on BIM technology, combined with the characteristics of green building materials and its relationship with BIM technology, it is urgent...

The Landslide Surge is a common natural disaster, which has the strong non-linear feature. In this paper, the SPH method is used to numerically simulate the generation and propagation of the surge which is caused by the sliding of Submarine and Aerial sliders in 2D. The comparison with the experimental...

What kinds of aspects are included in public services of urbanization? How many problems are there? How to solve them? In this paper, the author applies relevant systematic and scientific theories to treat the construction of public service problems as a system, and considers basic public services, social...

Condition monitoring can greatly reduce the cost of Pumping Station, To have reliable operation its condition must be monitored constantly. the paper presents a monitoring system of Pumping Station based on FPGA. The system uses EDA development software Max + plus to achieve modular design in FPGA, such...

Traditional manual parameter debugging is subjective and requires professional experience. To make up for the deficiencies, a new kind of parameter debugging approach based on complex genetic algorithm is proposed to calibrate the parameters of Xin'anjiang model. The proposed approach combines genetic...

By incorporation of silica fume, magnesium oxychloride cement(MOC) with high water-resistance property can be formed. Here, the effects of silica fume on compressive strength, water-resistance property, hydration product and microstructure were investigated. X-ray diffraction and scanning electron microscopy...

Multi-criteria evaluation (MCE) is the main method for failure analysis of buried pipeline. In multi-criteria evaluation, the effect of weights on results is obviously. In order to reveal the internal mechanism of the influence of weights, detailed analysis of criteria and order weights were carried...

Failure analysis of underground casing pipe is very important for engineering protection. Failure of underground casing pipe is affected by many factors, and shows very strong spatial variability. Therefore, a predictive model is constructed based on geostatistics, in which spatial variability is taken...

Put forward the remote monitoring plan of pumping station by introducing the difficulties of the management and operation of the pumping station. The paper realized the transmission of running data and image at pumping station field equipment by using wireless communication technology. The paper introduced...

The effective way to resolve the shortage of agricultural irrigation water resources is the research and application of new water-saving technology of surface irrigation in China. The aim of this paper is to improve the quality of field irrigation and water use efficiency, introduced two advanced water-saving...

Water is the foundational natural resource and strategic economic resource, which plays an important role in maintaining ecosystem and environment. Considering that the flood water resources are a special form, the floodwater utilization is a special way of surface water resource utilization. Based on...

The resettlement project in Southern Shaanxi is featured with a large amount of planning and construction in the scope of town. Due to the disconnection with the village and town planning and the lack of overall consideration on the ecological environment, problems have occurred such as the disorder...

In order to study the dynamical behavior of stiffened plates of steel box girder with trapezoidal stiffeners, FE software ANSYS and its secondary development are used to build the model of the stiffened plate. The plate, transverse diaphragms and trapezoidal stiffeners are all modelled by Shell63 Element,...

The problem of the balance of the rectangular thin plate with two adjacent edges fixed the other two adjacent edges free under the uniform load is solved by using the minimum potential energy of mixed variables. The solution process is clear, and the deflection surface equation is given. Through the...

Knot is the commonest surface defect, which has the greatest impact on lumber. A image processing method was designed using Matlab image processing toolbox in this paper, which combined with mathematical morphology theory. Based on plenty of experiments, two turning coordinate points of piecewise linear...

The long-term high-pressure consolidation test, of which the maximum consolidation pressure is 6 MPa and the longest consolidation duration is 34 months, is selected to simulate the deformation characteristics of the main compression soil layer (depth of 100 ~ 300 m) based on the study of the deep foundation...

Different structure types of buildings have different structural characteristics and seismic performance. Earthquake disaster investigation and damage analysis results of different types of buildings can reflect the existing problems of China's urban residential buildings in the seismic structure design...

Based on the superposition method for computing deflections of beams, the method of equivalent replacement beams is proposed for calculating displacements of beams. This method can be used to investigate the problems of deformation of statically determinate beams and indeterminate beams. This method...

In order to clarify the technical layout and development trend of water pollution control research in China, this paper analyzes the related domestic patent application of the water pollution control from 1985 to the present based on the Soopat patent search database, and analyzes the time layout of...

According to the application demand of the present water supply system of the Internet of things, designing the high precision liquid level measure and transmit circuit,especially,for the requirements of pressure measuring range and linear precision,using for pressure measurement and control of modern...

Based on the meteorological data, Kunming located in the subtropical plateau monsoon climate area, is proved to have clear dry and wet seasons with aboundant precipitation.The light and heavy rain have a great influence on surface runoff.The average annual evaporation is more than the precipitation which...

Variations in the acoustic emission parameters of normal concrete (NC), steel fiber reinforced concrete (SFRC), and nano SiO₂ fiber concrete (NSFC) with the increase in loads under four-point bending load were studied. Distribution law of acoustic emission signals and its correlations with flexural strength...

The collapsibility has become a key material property to study strength and deformation behavior of loess, which is closely related with its micro structural character. In this paper, the authors firstly obtained simple micro-structural parameters both on loess samples of before and after collapsing...

The effect of enhancement agents on the efficiency of electrokinetic (EK) remediation of contaminated soils has been extensively studied in the past few years. However, the larger scale ex suit EK remediation with enhancement agents has been rarely reported. In this study, medium-scale EK remediation...

With the continuous development of urban construction in China, the urban planning and design are also put forward higher requirements. In order to achieve the regional characteristics as possible as, it is necessary to focus on the regional design in the urban planning and design and clarify the urban...

The unsaturated seepage theory was employed to calculate the seepage field of geomembrane faced sandy-gravel dams with different heights. The influences of the location and size of defect on the phreatic line and seepage flux of dam were analyzed particularly. The results revealed that the change trends...

In this paper, the composition, defects and microstructures of titanium ingots prepared by Electron Beam Cold Hearth Melting are studied. The results show that the defects of the titanium ingot are mainly distributed in the final solidified position, The microstructure is mainly composed of dense columnar...

In order to study the effect of lateral soil movement on the bearing behavior of the pipe pile, the six pipe piles under different lateral soil movement and different lateral movement position have been tested in lab. The displacement of pile top for the lateral displacement of the soil, the soil pressure...

Pile foundation of buildings have not only bear the load from the upper structure, but also bear the earth pressure from the slope, its load transfer mechanism is more complicated. Hence, it is important to study the pile-slope interaction mechanism, and to improve the lateral capacity of pile foundation....

In order to verify the conclusion of push-out test and further analyze the influence of each parameter on the hat-shaped shear connector, a finite element analysis model of shear connector was established; To study the influence of the change of the diameter of the steel plate of the hat-shaped shear...

China puts forward the green development strategy in the "Twelve-Five Year" Plan. In the report of "The 18th National Congress of the Communist Party of China, "green" is the core of ecological civilization construction of five development concepts, "green" is the core of ecological civilization construction....

A Hamiltonian mthod is proposed to solve the steady state heat conduction problem. Due to the completeness property of the eigensolutions, any solution vector can be easily described by linear combination of the fundamental solutions. The method can be used to directly solve various boundary condition...

In this paper, we introduce the Hamiltonian system to study bending problems of elastic cantilever-beam. The variational method and the variable seperation method are employed to establish the dual governing equations. Due to the completeness property of the eigenvectors, the solution can be expressed...

In this paper, we introduce the symplectic method into the quasi-static analysis of the viscoelastic circular cylinders, with the emphasis on the local effects. By using the of variable separation method, all the general eigenvectors of the problem are obtained analytically. The traditional Saint-Venant...

In this paper, the governing equation of static analysis for frame structures is presented with the geometric nonlinearity considered. In the process of derivation, the updated Lagrange format is adopted. It is deduced for general three-dimensional solid elements first and then simplified for one-dimensional...

In this paper, the governing equation of dynamic analysis for frame structures is derived, with geometric nonlinearity considered. In the process of derivation, the updated Lagrange format is adopted and the elemental equilibrium equation is established at current configuration and then transformed into...

In order to study the project measures for enhancing the hydrodynamic of Guazhuhu lake, the selected range included diversion works and lake surroundings. A two-dimensional mathematical model numerical simulation method was used to calculate the hydrodynamic factors, such as flow velocity and water level,...

Magnesium phosphate cement blended with Portland cement were cured in MgCl2, Na2SO4, NaCl, HCl and NaOH solutions, and the compressive, flexural strength and microstructure were approached and their corrosion resistance were studied. The results show that the corrosion resistance of magnesium phosphate...

Particle size distribution of fly ash conforming to variable distribution functions were obtained. Fractal dimension of the fly ash were calculated and mechanical properties of the resulting mortar were studied. The results show that the fractal dimension of fly ash with varied particle size distributions...

This study adopts urban flood control systems into a cellular automata flood model (Caflood) for simulating the temporal and spatial evolution of urban flood. Caflood, which is different from the traditional hydrological model, using the cellular automata (CA) technique to simulate storm flood. The paper...

Establishing the mathematical model of energy consumption of chillers, pump, cooling towers, air conditioning units and coils in the conventional air conditioning system. Analyses energy consumption factors from experiments and simulations to provide the optimized variable flow scheme for the whole central...

An experimental investigation on vortex-induced vibration of plane gate with submerged flow is carried out by a combination of 3D-PIV technique and multi-channel vibrating data acquisition system. In order to explore the mechanism of gate vibration, the experiment is to synchronously test the distribution...

In recent years, the outbreak of natural disasters is becoming more and more frequent, which makes the damage to people's property and life getting worse and worse. Therefore, how to distribute emergency relief supplies after the disaster becomes very important. In this paper, taking the urgent needs...

Chongqing is a typical mountainous city with a lot of less developed mountainous townships which are important components in the process of pursuing the mission of sustainable development in China. It is appreciated that the investment on infrastructure projects in these less developed townships is the...

This paper presents a novel LNG air vaporizer that evaporates LNG using hot air generated by a solar wall. The simulation results and an overview of the thermal performance assessment are presented in this work. The simulations were made by use of the CFD software FLUENT to investigate the variation...

Lining crack is a primary disease in water conveyance tunnel engineering, and accurate analysis of the stability of lining structure with cracks is critical. Based on the theory of fracture mechanics, the contact model has been used to simulate the contact friction effect of crack surfaces. Combined...

The characteristics of energy consumption and exhaust air of different types of buildings is introduced. The advantages and disadvantages of various heat recovery methods are discussed. According to the characteristics of different types of buildings, the scheme of exhaust heat recovery is determined.

Along with the increase of demand for bamboo, people has aroused the great importance to bamboo machinery automation, but now the low degree of the bamboo machine automation leading to the bamboo processing work is jointly by man-machine cooperation. This kind of excessive proportion of manual operation,...

This paper analyzes the relationship between building industrialization and labor productivity. Based on Cobb-Douglas production function, the labor productivity model is established to evaluate the effect degree of building industrialization of labor productivity, then a case study of China's construction...

The construction phase plays an important role in the project life cycle, consuming a lot of natural resources. The development of green construction is significant to develop sustainably by saving natural resource and protecting the environment, and its evaluation makes it possible to implement the...