Advances in Engineering Research

To determine optimum extraction process of volatile oil from flower of Scindepus aureus and analyze its chemical composition. The essential oils were extracted from S. aureus by microwave-assisted extraction (MAE), distillation time, solid-liquid ratio. Microwave Power were investigated with extraction...

Spatial-temporal changes of land use and landscape pattern dynamic of Four Seasons Flower Valley in Beijing mountainous area were analyzed from 2007 to 2013. The results showed that: Regional structure of ecosystems in FSFV was forest-farmland-grassland. Farmland was the dominant artificial type mainly...

In order to find a turbulent flow model which can accurately describe the internal mixing process of the nozzle adjustable jet pump, 8 combinations made up by four turbulence models (Standard κ–ξ, RNG κ–ξ, Realizable κ–ξ and RSM) and two wall functions (Standard wall functions and Non-Equilibrium wall...

According to the equilibrium condition of geometry relationship, we derived the formulas that can be used to calculate the loss of prestress of prestressing tendons with the double-end tensioning and the asymmetrical arrangement parabolic curves. Through an example of the bridge engineering, we described...

In this paper, fatigue tests of butt-welded joints, under four-point bending cyclic load, were conducted to investigate the influence of welding deformation on fatigue crack initiation life. It is found that the distribution of residual stress around the weld toe is changed depending on the welding deformation....

Reading is the process of college students' understanding of the world and their own knowledge, is the main channel to expand the knowledge perspective, and is the main means to enhance the comprehensive cultural quality. In the electronic information era, the investigation of digital resources in college...

ZE41 Magnesium (Mg) alloys are widely employed in the automotive and aerospace industries because of their advantageous qualities like lightest structural metal, corrosion resistant and better mechanical properties. Since it is highly cumbersome to machine this alloy of complex shapes using conventional...

With the continuous development of higher education, reasonable distribution of teaching resources has become an urgent problem in time and space. This question is a typical college course arrangement.Arranging Course problem is NP-complete a multiple target multi portfolio. We use an improved hybrid...

This paper outlines the basic structure of equipment maintenance work, analyzes the conditions and necessity for the emergence of green maintenance, from the different aspects of quantitative requirements, maintenance method, maintenance materials, maintenance energy , maintenance process and maintenance...

It was found that appropriately increase weight ratio as well as attention to control pH in sedimentation and reduction phases can enhance the treatment effect of chromium-containing wastewater and prevent hexavalent chromium content rebounding after processing.

Grind-hardening is a new technology for steel parts surface enhancing which uses thermal and mechanical composite effects on the parts in the grinding process. During the process, the workpiece surface generates hardened layer which improves the surface quality. As a key performance indicator of measuring...

The current research work is aimed at analyzing the total chloride content in concrete by adding Electric Arc Furnace (EAF) slag in percentages as alternative to conventional coarse and fine aggregates wherein the research is conducted to determine whether percentage changes of EAF slag could mitigate...

Energy Management System (EMS) is used as a renewable energy control strategy. This research uses photovoltaics and wind turbines, which is a suitable combination because photovoltaics work during the day while wind turbines can supply batteries that are used at night. The Energy Management System (EMS)...

Based on the Tersoff potential, we have investigated the effects of dislocations on the crystal growth rate of Si (110) rough interface by a molecular dynamics simulation. The atomic structures show that, the (110) interface morphology with a dislocation keeps flatness similar to that of dislocation-free....

In this chapter, the design of the refrigeration unit with the cooling capacity of 120W in the sightseeing beach is used to calculate the lighting area and the collector power of the vacuum tube collector from the solar radiation incident on the solar vacuum tube collector. The design principle of the...

After entering 21 century, education has been influenced by the informatization and globalization. The popularization of Internet and computer technology in education shows possibility in reforming traditional teaching modes. English MOOC is generated, and its teaching modes are combined the advanced...

Green Wall has an important effect on the outdoor thermal environment quality and the thermal comfort of pedestrian. Rational layout and green design can effectively alleviate the negative impact of "Heat Island", reducing the heating and air conditioning energy consumption of the buildings. This paper...

To create a modernization mine of safe and efficient production, the premise is that must be to ensure safety, economy, stability of the roadway support, and bolt support in coal roadway supporting systems plays an important role, in order to make the bolt support can better service for our modern mine....

Since the transmission efficiency and the transmission power of the existing resonant wireless power transmission (WPT) system with a single transmitter were lower, a compact resonant WPT system with dual transmitters was studied. There was a close coupling relationship between the dual transmitters...

High-speed high-precision data acquisition applications in modern industrial control field is very wide. The reasons of Environmental and circuit, the interference signal is introduced into the collection process inevitably, resulting in loss of precision and sampling error rate increases. When improving...

With the development of power electronics technology， how to improve the output quality of DC power supply has become an important subject of recent scholars' research. This paper put forward a new PWM control mode， the DC power supply output ripple is effectively suppressed. The theoretical basis is...

The paper explains the overview of domestic and international refrigerated transportation. It also points out some problems existing in the railway refrigerated transportation of China. The article discusses the reform of refrigerated transportation organization, the development of advanced refrigeration...

When some coefficients involved in nonlinear programming problems are taken as interval numbers, the problem becomes more challengeable than the original one. In the paper, a nonlinear programming problem with interval objective coefficients is considered, and a genetic algorithm is presented. Firstly,...

Though the artificial potential field applying to the path planning of mobile robot has the advantages of rapid respondent speed, small computation and real-time property, there are still problems such as the goal unreachable and existence of a local minimum point value, thus the improved artificial...

With boosting development demands for university information construction, the number of university application systems had been dramatically increased. However, many universities were lacking of pre-planning in the information construction, which had resulted in mutual independence of application systems,...

The double slanted cantilevers are used in some micro-structure designs, which have some unique characters. In this paper, the mathematical model of the double slanted cantilevers with irregular cross-section was investigated based on the theory of material mechanics. The moment of inertia and principal...

In the global tide of artificial intelligence, China has its own specific opportunities. Since the financial crisis, with the market environment, technological progress, factor conditions, the accumulation of capital and other major changes in the situation, China's industrial sector has emerged the...

In this paper, we removing the Kariba Dam and replacing it with 18 smaller dams along the Zambezi river. Furthermore, we set up three progressive models-the cascade dam system model, the long-term optimal dispatch of the new system model, and the successive linear programming optimal scheduling model,...

With the rapid development of urban landscape design, the lighting is more and more needed. Existing urban landscape and lighting design of the system is not perfect, according to the regulations of city road and park lighting standard to analyze, and the various forms of existing urban landscape and...

To solve the problem of current communication network for smart distribution automation, key technologies of heterogeneous networks were analyzed and researched, including network resource management, dynamic network selection and intelligent switching strategy as well as channel protection algorithm...

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...

To investigate the seismic behavior of autoclaved aerated concrete (AAC) roof panels, the bending experiment of 4 AAC slabs for estimating the deflection and moment capacity was made. All specimens were placed under a test frame using monotonically increasing load till failure. The experimental results...

China feudal society has seriously hierarchical characteristic, its clothes distinguish the status and rank from the color to the pattern. The pattern of Ming and Qing official uniform has special function and inheritance. The bird and beast patterns in representative official uniform not only contain...

According to the problem that uncertainty information is difficult to be merged during the decision process of multi-source irrigation information, a fusion method based on fuzzy rough sets and D-S evidence theory was proposed. Using the fuzzy rough set theory, the basic probability assignment function...

Plant is an important part of urban landscape features. Although the greening condition of the Winter City is limited, a good plant arrangement design can help to create a more comfortable and beautiful public space, which reflects urban characteristics and promotes ecological development. This paper...

In order to get accurate license plate location, a method of license plate location based on Sobel operator and mathematical morphology is proposed. Sobel operator and Dilation and closing operation are used to obtain approximate position of the license plate. Then three steps are adopted to get accurate...

Dynamic power optimization is an important part of the power optimization for embedded parallel processing. Dynamic power estimation is the premise for dynamic power optimization. The evaluation model with fast calculating speed and high accuracy can improve the efficiency for dynamic power optimization....

In aircraft control, getting the current aircraft attitude is foundation that we can control the flight of aircraft.In this paper,MUP6050 and HMC5883L sensors are used to measure aircraft attitude.As time goes on,the accumulation of integral error is growing,when the gyroscope is used to solver aircraft...

In the industry, the damage detection of stayed cable is an important research subject. A proper method for the vibration signal processing is indispensable. The Hilbert-Huang Transform (HHT), which has been successfully applied to many different fields in the last ten years, may provide a promising...

With the rapid and bursting development of computer science and sensor technology, efficient remote sensing (RS) image classification algorithm is ur-gently needed. There are plenty of applications of remote sensing image processing techniques. In this paper, we propose a new agricultural remote sensing...

Aiming at the poor reliability of targets destroy for single base surface-to-air-missile weapon system, and the existing shortcomings of anti-destroying ability for missile networking system, this paper research on system level surface-to-air-missile defense system network features. On the analysis of...

To reveal the effects of the different city environment (clean area and polluted area) on native trees, leaf functional traits of six native trees in Zhanjiang were studied. The relationship between leaf mass per area (LMA) and leaf functional traits were analyzed. The results showed that different leaf...

To study the effects of PCVD combined nitriding coating processing on cutting performance of high speed steel tool, the PCVD was performed on W6Mo5Cr4VZ (MZ) steel tools to get surface strengthening, tool surface micro-hardness before and after PCVD process was studied, wear property and bonding force...

Modern mobile communication technology and mobile learning theory combined with the mobile learning, provides a new model for Japanese listening learning. This system is based on the researches on the iOS platform. First of all, research by Cocoa touch, Media application, the Core service and the Core...

Objective: The literature remains controversial on ras gene mutation prognostic significance for survival in AML and MDS. In this paper, study meta-analysis of its occurrence and prognostic relevance in acute myeloid leukemia and Myelodysplastic syndromes. Methods: The PubMed, Cochrane Library, EBSCO,...

In this paper authors carefully research the strategic emerging industries of"manufacturing industry of intelligent equipment of using new energy power generation"through the outlook of Nantong (that is, taking the manufacturing industry development of intelligent equipment of using the new energy power...

In this work, an intermediate product DOPO-A was firstly synthesized through an addition reaction between triethoxyvinylsilane and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). Then DOPO-A was hydrolyzed to form DOPO-A' (silanol of DOPO-A) and the surface of expandable graphite (EG) was...

Transparent conductive thin films of aluminum-doped zinc oxide (ZAO) were prepared by radio-frequency magnetron sputtering with ZAO (98 wt% ZnO, 2 wt% Al2O3) as the ceramic target. The visible transmittance was investigated by ultraviolet–visible spectroscopy, the carrier concentration and Hall mobility...

Space plate-beam mixed unit model is established. Mechanical characteristics of a stiffening suspension cable reinforced steel truss bridge is analyzed preliminarily. The mechanical principles of the bridge type are discussed through studying the influence of stiffening suspension cable vector height,...

Based on Cellular Automaton (CA) and Monte Carlo method, this paper constructs a model to discuss the problem of merging after toll, and designs the shape, size, and merging pattern of the toll area. Firstly, the movement of the vehicle is broken down into three stages to establish the corresponding...

Through consulting relevant literature, during the current solution for space junk, the relatively perfect theories are the following kinds, laser removal technology, satellite debris collector, space garbage trucks, suicide satellite, and resistance-increase device. we proposed An Automatic Tool of...

Based on NC Code, in this paper, a kind of virtual descriptive language—V Code is designed and achieved for VA simulation. It is divided into three parts: scene setting code, motion controlling code and environment rendering code. At the same time, V Code definition, function classification, V Code interpreter...

Central orogenic belt means sandwiched between Tarim block, North China block and Yangtze block, it was EW distributed by Kunlun-Qilian-Qinling-Dabie-Sulu mountain chain and sandwiched between Lot composition, stretching more than 4,000 kilometers of Phanerozoic orogenic complex system. Qaidam Basin...

For three-tower cable-stayed bridge, the dynamic characteristics of the structure is studied by establishment of the finite element model. By changing structural parameters of thickness variation of the bridge panel and elastic modulus of concrete, some regularity of stiffness and dynamic properties...

In wireless sensor network protocol, a multi hop routing protocol based on density clustering is proposed to deal with the problem of large communication overhead, unbalanced node consumption and hierarchical routing. Protocol divide clusters by density based method, and transfer the data with the base...

The barrier toll is a crucial part of a freeway.The bottleneck of a freeway about safety and throughput is usually the fan-in area.In this paper, I put forward the merging model of barrier tolls (MBT) based on cellular automaton(CA) taking various factors which influence the merging of vehicles into...

To meet power cable construction underground in the city, it is necessary to ensure the normal operation of power cable. In this paper, we do the research about the compensation mode of cable line construction in Henan province, that is the difference mode and the construction mode, and analyzed with...

A novel substrate integrated waveguide (SIW) cavity-backed antenna using quarter mode SIW is proposed in this paper. The quarter mode SIW antenna is realized by splitting the SIW cavity into four parts along the fictitious quasi-magnetic wall, which can preserve the field distribution of original SIW....

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...

CGMCC5515(Rifr) were domesticated step by step. Pb-resistant bacteria (PbRB) of CGMCC5515 were selected in directional enrichment and screened with TTC from the pot rice rhizosphere soil with lead and other remediate material, the reverse screen model of simulation soil rice culture with reproducible...

Based on the method of nonlinear finite element, the dynamic response characteristics and fatigue life of soft rock at the bottom of the typical cross section of high speed railway are studied. The research result shows that the peak dynamic stress of the soft rock increases nonlinearly with the increase...

Many problems have occurred in using an 11-roll leveler in 2250 cross cutting line due to the increasing maximum strength of hot rolled coil. To determine the cause of these problems, a model to calculate the leveling capacity quickly is constructed using leveler’s structural parameters and force-energy...

This paper is focused on orchard vehicle rollover and tipping problems in its operation process. Firstly, seven degrees of freedom orchard vehicle ADAMS model is established. And then, it built up a driving stability control algorithm to adjust input speed by real-time pitch angle, roll angle and other...

This paper designed a CAN network analyzer based on USB bus technology, whose function including network analysis, protocol parsing and node simulation. The CAN network analyzer based on USB interface in this article is mainly composed of two parts - USB-CAN adapter and host computer interface. This...

Leak repair clamp is the preferred method for permanently repairing pinhole and crack-type pipeline leaks underwater, and the locking mechanism is a key component of it. In this paper, through the analysis on the bite-in theory and the failure mode of the locking mechanism of clamp, three principles...

To simulate the tread temperature rise of the working subway train in the process of its normal operation and to explore the temperature rise limit of wheel tread during operation, finite element numerical simulation was used in this paper. Based on heat transfer theory and finite element method, a three-dimensional...

With the development of automobile consumption increasingly civilians, how to choose a good family car has become a topic of growing concern. In the course of our purchase of cars, the appearance, performance and safety of the indicators are considered. In order to improve the dynamic performance of...

Energy Internet is the product of deep integration of energy and information, is an important fulcrum to promote the energy revolution. In existing traditional market transactions, independent power generation model of various energy results waste of energy resources, and low efficiency of the industry's...

In practical process of dynamic balancing, rotating speed, mass and angular location of trial weight will affect one-time balancing effect. In order to find the best balancing speed, trial weight mass and angle, computer simulation and experimental research are conducted. The results show that, one can...

Nanocrystalline ZSM-5 can be used as catalysts or catalyst supports,and it has higher catalytic efficiency compared with micro-sized ZSM-5 zeolite because of its large specific surface area,so it attracted wide attention.This paper mainly discusses the hydrothermal synthesis of nanocrystalline ZSM-5.Aluminium...

In this paper, a multi-objective optimization model is established for the search of missing aircraft considering the time, efficiency and cost. First, a probabilistic model is developed to determine the distribution of the aircraft's falling zone. Secondly, we provide a fair estimation of cost based...

The pushing chain is a novel telescopic mechanism used to push the object from one position to another rapidly. The position precision of the pushing chain influenced by various factors is very important to accomplish the task of pushing the object. To compensate the clearances and machining errors,...

In order to explicitly specify the force characteristics of tied arch bridge with trough girder, this paper focus on the tied arch bridge vertical stiffness analysis under different rigidity distribution between arch and girder. The paper based on a tied arch bridge with trough girder which the span...

As limited by the size and load, multi-array antenna can not be installed in the helicopters to achieve forward-looking SAR imaging. A "bistatic" forward-looking imaging program is proposed, which used a satellite to carry illuminator and a helicopter to carry receiver. Then the forward-looking SAR geometry...

Piezoelectric ceramic as a driver is applied to the deflection of nose, which is a kind of frontier missile control mode. In order to improve the efficiency and reliability of deflection mechanism, a design scheme of the control mechanism that piezoelectric ceramic actuator combined with improved PID...

This paper is based on a diversion tunnel excavation project, the rheological stability analysis was carried out on the excavation process. Due to large buried depth, tectonic stress and stress have influence on the safety of engineering. Based on the theory of unloading rock mass and rock rheology theory,...

Catalyst selection for the catalytic wet oxidation of pharmaceutical sludge was investigated. The selected catalysts include homogeneous catalysts, alkaline catalyst, Zeolite and supported Zeolite catalysts, and metallic oxide catalysts. Experiments were performed at 220 øC for 60 min with O2 initial...

The fire tests included fire load and fire temperature had been conducted to nine reinforced concrete frame structures with ISO834 standard heating up curve. Furthermore, the static load tests had also been done under room temperature to the above nine structures after cooling and one reinforced concrete...

Establishing complete quality supervision of vegetable production is an important measure and method to improve the quality of vegetables and ensure food safety. In this paper, an information system of vegetable safety production management has been designed, which has provided comprehensive information...

An analytical solution based on slab method is first proposed to calculate the rolling force and rolling torque in asymmetrical sheet rolling where the work roll radii, their speeds, and the interfacial frictions may be different. In the solution, the shear stress acting along the vertical sides of each...

SSH is a powerful open source framework of Java Web and a lightweight solution for develop J2EE enterprise-class Web application. For the characteristics of SSH framework configuration file content more, configuration complexity and difficult to grasp, study the core configuration files. Based on the...

This report presents the application of a Tuned-Mass Damper system to effectively reduce external vibrations experienced by the driver, caused by the random vibrations of the track conditions. The aim of this study is to investigate the impact of a tuned mass-damper (TMD) system on external vibrations...

the insulator is a kind of important electric components, because it plays a role in electrical insulation and plays a supporting role in mechanical, power system and even the development of the whole society to a higher degree of dependence on the performance of insulators, the requirements are also...

Large particle size limestone (CaCO3) is an important raw material used in many branches of industry. For lacking of reaction parameters of large particle size limestone, numerical analysis method is used to study the decomposition reaction kinetics of limestone to understand the thermal decomposition...

Ebola virus disease is a severe, often-fatal illness and has a case fatality rate up to 90%. Ebola crisis could severely do harm to the economies of Guinea, Liberia and Sierra Leone unless action is taken quickly. In order to eradicate the disease with the shortest time and the least cost, we build a...

During the course of aircraft manufacturing, there are large volumes of data which has complex relationships. In order to ensure the rationality of the assembly process, to reduce assembly costs and to improve assembly efficiency, centering on aircraft digital assembly process system, we studied in-depth...

The indoor temperature control process in air-conditioned room is a multiple-input multiple-output (MIMO), nonlinear and time-delay system. Whereas the traditional off-on control methods, traditional PID control and conventional fuzzy control, exist some advantages and disadvantages, so this paper has...

Is there a way to keep the temperature even throughout the bathtub as close as possible to the initial temperature without wasting too much water? In this paper, the bathtub system can be abstracted as the water tank temperature control model. Because many factors cannot be taken into account at the...

To realize the eye pupil center location in color face image, a new algorithm based on skin color segmentation and radial symmetry transform is proposed. The algorithm makes full use of the pupil and the surrounding region’s gradient variation characteristics and radial symmetry characteristic, which...

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...

In this paper, we design a LED driver, power factor correction circuit topology used + quasi resonant flyback type two level structure, the quasi resonant flyback type DC/DC transform part of the small signal model, design the system feedback loop parameters, to achieve the constant current drive + constant...

Tied arch bridge with trough girder mainly consists of girder, arch rib, suspender and prestressed steel bares for its superstructure. In terms of its overall mechanical performance, there are many factors affecting its mechanical performance.The factors are main girder section form, arrangement of prestressed...

The nano silica was used as the dispersed phase particle and the polyethylene glycol was used as the dispersed phase medium. The shear thickeing fluid(Thickening Fluid Shear, STF) which the SiO2 solid content of STF was 9%, 12%, 15%, 17% and 20%. The different concentration different molecular weight...

By a series of creep test on and natural environment, the development trend and law of C60 high-strength concrete creep on natural environment are analyzed and the creep law of reinforced concrete is discussed in this article.

The production of Portland cement accounts for approximately 8% of the 37 billion tonnes of carbon dioxide released into the atmosphere annually. Unlike traditional concrete, geopolymer concrete significantly reduces greenhouse gas emissions by up to 80% due to the absence of calcium carbonate conversion...

The monolayer MoS2 thin film was deposited directly on quartz substrate by chemical vapor deposition (CVD) approach using MoO3 and sulfur powders as reactants. Raman spectroscopic and photoluminescence (PL) spectroscopic analyses were conducted to evaluate the structural and optical property of the grown...

From the perspective of urban design, this paper investigates and records the soundscape in city blocks in the use of literature research, acoustic measurement, sound recording, soundscape walk, in-depth interview and other research methods. Based on data analysis, we use “place" concept and spatial...

To solve the problems of easily falling into local optimal solution and solving process instability for adaptive genetic algorithms, an improved adaptive genetic algorithm is presented by improving the crossover and mutation probability calculation method, which balances the solving stability and reliability...

In the paper, a digital optical communication system based on optical two-amplitude minimum shift keying (2AMSK) signal transmission with coherent detection is proposed. The simulation results show that, 100-Gb/s optical 2AMSK signal is successfully transmitted over 480 km standard single mode fiber...

We used the characteristics of the birds' wings, the blades of the fan are improved, and several factors that influence the noise of the bionic leaves are experimentally analyzed. Finally, the striped width of the leaves, the stripes of the leaves and the thickness of the leaves are taken as factors...