Advances in Engineering Research

Criteria of next generation aircraft, “quieter, cleaner and greener”, were dedicated by designers and stakeholders in the past decade years. New materials, different design philosophies and new manufacture technologies are used on civil aircraft in China. Gaps between China and abroad, in the fields...

Strange nonchaotic attractors exist in quasiperiodically forced system universally, which have fractal structure in geometry but no sensitivity to initial value, which also are among the international hotspot issues studied by nonlinear kinetics for the recent ten years. Many scholars have done a lot...

With the development of science and industry the rapid increase in time-delay systems has prompted more and more researchers to use intermittent control theory to analyze and synthesize the stability of the time-delay systems subject to actuator saturation and random perturbation. This note investigates...

The deformation behavior of aluminum alloy 5052 is studied by isothermal hot compression in a wide range of temperatures ranging from 300 °C to 450 °C and strain rates ranging from 0.01 s-1 to 1 s-1. The results show that the peak stress increases with the strain rate while decreases with the temperature....

According to the dynamic performance evaluation indexes of the vehicle, combining the performance requirements of the electric vehicle which paper studied, choosing the motor parameters, transmission ratio and the battery parameters respectively.The vehicle model is established in the ADVISOR software,...

Western China is confronting two urgent problems, rural poverty and environmental deterioration. The development of renewable energy boasts great potential to solve these two problems. In addition, developing renewable energy in rural areas of western China may result in several benefits, including meeting...

In the research of route planning, better balance between planning time and route quality should be achieved to reduce UAVs cost. This article is based on basic RRT (Rapidly-exploring Random Trees) and proposes an improved RRT_Connect algorithm which improves the way generating new node of the tree,...

In the case where the static threat a priori position information has been obtained, the threat avoidance of the unmanned combat aircraft can be realized by the pre-route planning method. In this paper, we study the planning method of evading route under the condition of known static threat. According...

The operation of cascade hydropower stations in dry season is an important problem. In dry season, there are two primary objectives: maximize cascade minimum output and maximize total power generation. Minimum output reflects the stability, security and reliability of hydropower. Power generation reflects...

This paper reviews the recent development of phase change cold storage technology for food cold chain application. According to the application field of cold chain, developments of phase change cold storage technology in cold storage and low temperature transport are introduced separately, such as hold-over...

Based on the actual operation of the simulation data and adopted PLC program control, it can become an independent system, by sampling, purging, gas sample, sample pretreatment, gas analysis, instrument calibration, program control and the signal output and other parts, and will be assisted with CO probe...

The integration of a large amount of renewable energy into the distribution network brings the severe consumptive problem. Compared to the traditional storage methods, in this paper, we propose a new solution which is to convert electricity into hydrogen by the electrolysis cell. What's more, by methanation...

On the basis of the study of the synthetic technology of sulfonated acetone formaldehyde polycondensate, the paper analyzes the polycondensate’s synthetic mechanism and advances the three-stage formaldehyde additive technology.

On the basis of studying water-sediment movement in the Lingdingyang sea area, sedimentation characteristics of the trial dredged-trough of immersed tube tunnel of HZMB are analyzed, with 17 groups of underwater topographic survey data and the measured results of fluid mud and silt unit weight in the...

A practical and fast fault ergodicity algorithm for the reliability evaluation of distribution system is proposed on the basis of a large number of analysis of the distribution network structure. The algorithm uses breadth first search and depth first search and the minimum path set for the load point...

This work represents the study of the effect of aspect ratio on coupled ring oscillators. The two different coupled ring oscillators i.e.., 3 × 2, 3 × 3 are designed in 90nm CMOS process. The frequency, phase noise and power consumption are measured for different aspect ratios also a comparative study...

The process of exploration and production in coal mines have many potential dangers so the coal mine safety problem has become the focus of social concern.Mine gas early warning system is an important measure that guarantee coal mine safety production because coal mine gas explosion is an important cause...

This paper is based on the traditional wind-storage combined power generation system. A two-dimensional cloud model is used to control the variable weight filter to analyze the relationship between filter time constant, energy storage capacity and power fluctuation. In order to take the battery charge...

With the development of industry and the progress of society, a kind of vehicle that can travel on the ground like a car and fly in the air like an airplane has become a research focus both at home and abroad. The method of bionic design and aerodynamic design method based on the combination of aesthetic...

In the distribution network, pole-type transformer is not only the most common device related to power supply safety and environmental beautification, but also in a large amount of number and needs a large number of maintenance. It is difficult to achieve the standardization. In view of the existing...

Cumulative energy response spectra can generally be used to estimate earthquake energy demand of structures. Some research findings show that the earthquake input energy demand is stable than other forms of energy demand, so it is important for scholars to research earthquake input energy demand and...

According to the connotation of urbanization, this paper constructs comprehensive evaluation index system of regional urbanization level from four aspects that population urbanization, economic urbanization, spatial urbanization and social urbanization, and uses the method of entropy to make comprehensive...

Pulse thermography has been proved an effective method for the quality testing of coating materials. Surface temperature variations not only reveal the shape and position of the defect, but also reflect the property of the second layer. In this paper, the relationship between surface temperature and...

The concept of Nano-sized semiconductor material and some of its basic properties such as small size effect, surface and interface effect, etc. are presented as well as how these basic properties explain its physics properties. This article also presents the preparative techniques and the applications...

WC/steel matrix composites with WC particles of 150 mesh as reinforced body and 5CrNiMo steel as matrix, were prepared by electroslag melting and casting technology. The content of WC was 45%. The influence of quenching temperature on the transformation regularity of reinforced body for WC/steel matrix...

In the experimental study of electric vehicle (EV) charging equipment performance testing, we found that when the EV charging equipment charged the power battery in a constant current mode, some charging devices output current contained a lot of current ripples. Thus, the index of voltage ripple coefficient...

Weaponry model architecture oriented to composition and reuse can improve modeling efficiency and ensure consistency of models, for developers can build weapon models by model composition and reuse. However, there are massive models in the field of military equipment, and the combination and inheritance...

Quantitative research on the soil erosion intensity in the mountain areas of Beijing was estimated via utilizing RUSLE model supported by GIS and RS technology. It is concluded that no erosion and slight erosion were the primary erosion intensities in the mountain areas of Beijing. The soil erosion was...

The effects of homogenization treatment on the electrical conductivity, tensile strength and microstructure of Al-B electrician round rod were investigated by means of tensile test, optical microscopy(OM), scanning electron microscopy (SEM), energy dispersive spectroscopy(EDS). The results indicate that...

The flexibility and convenience offered by mobile communication have made it one of the fastest growing areas of telecommunications, and communication security has become particularly significant and prominent. One of the most challenging security threats is the attack of rogue base station which posing...

The transverse free vibration of Timoshenko beams resting on viscoelastic foundation are studied. Complex frequency equations are obtained for pinned-pinned ends. The effects of beam and foundation parameters on natural frequencies are analyzed in numerical examples, and the characteristics of Timoshenko...

The intrusion detection algorithm calculates the deviation distance using Chi-square test statistic. The amount of calculation can be greatly reduced. Sample data coming from operating system LINUX and Windows8 was presented and compared. The results of this study show that the algorithm achieves the...

This paper presents a new type of clock system based on standard CMOS 0.18 m, 1.8V process. It can be used for 14bit, 500 MHz sampling frequency, time interleaving (TI) ADC. The clock edge reassignment technique has been introduced in this paper. Simulation has been run in Spectre under Cadence platform....

Based on results of biomass combustion and pyrolysis using TG-DSC analyzer, biomass thermodynamics characteristics were studied. Integrated heat model and differential heat model were used to determined biomass thermal behavior, and the former fitted the actual better; the heat capacities with temperature...

In the paper, we research how to locate the crash area of the lost plane. We take ocean currents, wind-driven currents etc. into consideration. Defining the best searching radius , we can obtain the best searching area. Wreckages are moving, we renew the searching area using . And we color these circle...

The reasonable and accurate assessment of the development level of the power grid is very important for a country's power grid construction and power distribution. The domestic and foreign power grid assessment index system, grid comprehensive evaluation methods are summarized in this paper, expounds...

In order to shorten the detection time of DSD series high frequency electric brush plating power supply, we designed a tester for the power supply, which can facilitate data analysis and maintenance of power supply for the staff. Working principle, the hardware structure and software flow are depicted...

The signal integrity problem has become a limit on current electronic system design and development. This paper studies the transmission performance for high-speed PCB complex interconnect structural model consists of via, solder ball and trace. Different length of traces and different radius of pads...

With the deepening of research, increasingly signal distortion and logic errors are no longer caused by the interconnection of line,in the multilayer interconnected system, the coupling and delay between the signals have a great influence on the performance of the system, Therefore, the VLSI circuit...

Anion-exchange membrane composed of chitosan (CS) and poly[(3-methyl-1-vinylimidazolium methyl sulfate)-co-(1-vinylcaprolactam)-co-(1- vinylpyrrolidone)] (PMVMS-co-VC-co-VP) was prepared by applying double cross-linking technique for alkaline membrane fuel cell (AMFC). Having tested the ion conductivity...

The electrostatic gyro monitor(ESGM) has complicated structure and needs a long time to start up ,it requires sailing at a uniform course and casting fin to reduce ship shake ,avoiding sailing at low latitude(6øN~6øS),which is difficult to achieve cause of the limitation of mission area and weather condition,in...

FIFO has been widely used in various data transmission systems due to its ability to temporarily store and manage data efficiently. In modern digital systems, ensuring efficient and reliable data transfer between components operating at different clock domains is a critical challenge. Asynchronous FIFO...

This paper mainly studies the optimization design method of annular slot in the cylindrical resonant cavity. Firstly, we illustrate the microwave resonant cavity perturbation method and radiation power's influence on the cavity; then using HFSS to simulate the radiation power calculation, in order to...

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

The Carbon fiber composite material has been widely used for its high specific strength, stiffness and many other excellent properties. But for the unidirectional carbon fiber composite, the transverse performance is much poorer than the longitudinal performance. Under the transverse load, interface...

This is a study on environment inside subway cabin under the effects of piston winds. Subway trains move fast in underground tunnels and induce strong piston winds which will change the atmospheric environment around every cabin. Through a more realistic Computational Fluid Dynamics approach with a full-scale...

Based on the convex geometry, a lot of endmember extraction algorithms have been proposed, in which N-FINDR algorithm use sample points in data cloud to construct simplex and maximize its volumn, it suitable for the images which contain “pure pixels”, we can randomly select pixels as the endmembers to...

To confirm the role and mechanism of gefitinib used as a new stent coating material on inhibition of smooth muscle cell proliferation, MTT assay was used to measure the cell proliferation and Western Blot was used to determine the expression of Caspase-3 and Bcl-2. Experiments showed that, compared with...

As the Tropical Rainfall Measuring Mission (TRMM) satellite completes more than a decade of operation, it has provided researchers throughout the world with a large volume of rainfall data. The Yangtze River is the longest river in China, it plays an important role in the regional water cycle, energy...

Network protocol conformance testing is a functional black box testing. It tests whether that if the implementation of a protocol consistent with consists with the protocol standards according to the protocol text description. A method of network protocol conformance testing with Petri net is presented....

The design is a function with a variety of rehabilitation training machine, for there are injuries and recovering patients. The multi-functional integrated set by upper training, lower body and unified protection protective function of limbs force patients were fully trained to play a role in rehabilitation.

In this paper, we study Moving Checkers Game, an interesting shifting checkers game consisting of n black checkers and 1 white checkers. We have proved that the minimum number of steps needed to play the game for general n is 2n+1. We have also presented an optimal algorithm to generate all of the optimal...

With the rapid development of science and technology, three-dimensional modeling technology bridges will continue to progress, which is widely used in bridge engineering, bridge design can contribute to enhance the quality, thus contributing to the sustainable development of the bridge project. Three-dimensional...

The influence of different flapping wing models on the aerodynamic performance of a hovering insect is numerically investigated. Some simplified models are compared with the aerodynamic performance of the hovering fruit fly wing. With the increase in the complexity, two different models are considered...

In the first part of the paper, the models of electrolysis cell and AND were presented. Based on the models, the optimal model with the consideration of the network operation constraints in the distribution level is presented in this paper. Case studies were carried out to prove the advantages of the...

With the construction of the super-large foundation pit for Wuhan metro as the engineering background, this study predicted the deformation of supporting structure and the distribution of earth pressure in the active zone at different stages of step-by-step excavation and analyzed the “soil arching effect”...

The article discusses the developing of pastoralism in Kalmykia that is being studied in a limited number of works. Moreover, the researchers did not try to make comparative historical parallels with modernity. Even though nomadology has been developing over two centuries, in the modern period, discussions...

in recent years, the research and application of welding robot technology has made many outstanding achievements in seam tracking, off-line programming, path planning, intelligent control and so on. With the continuous development of computer technology, intelligent control technology and artificial...

Ferrocene, as a significant part of the organic synthesis, who can derivatives a large amount of compounds. This research expresses the progress from the preparation of 6-dichlorobenzene- 5-cyclopentadienyliron to the formation of 6-Bis(phenoxy)- 5-cyclopentadienyliron. Nesmeyanov’s theory, throughout...

With the increasing need for flame-retardant optical cable currently, requirements for flame-retardant levels of optical cable differ in various occasions. This paper introduces the differences between optical cables with different flame-retardant levels, focuses on describing the design of a fire-resistant...

A modulated float-assisting, Bulletproof, stab resistant cloth is designed; the preparation method and corresponding product are brought forward. The cloth is composed of the coat, the standardized modules and components. The cloth has a neck protection body, the coat and crotch portion protecting body....

Paralytic shellfish poisoning (PSP) toxins are potent neurotoxins mainly produced by marine dinoflagellates. However, the increasing number of findings of toxin-producing bacteria in dinoflagellate intracellular cells supports the hypothesis of the bacterial origin of PSP toxins. Although toxigenic bacteria...

An Extreme Learning Machine (ELM)-based novel channel estimation algorithm is proposed for orthogonal frequency division multiplexing (OFDM) communication system with multi-path propagation characteristics. In addition, a low-pass filter is utilized to filter the noise components which are separated...

This paper presents the results of a study on the fatigue damage of concrete under uniaxial compression. Based on the experiment results, the change law of fatigue modulus is put forward. Then the paper presents a fatigue damage model. By reference to the concept about the damage variable defined by...

Under the background of formulating environmental tax policy, the polluting enterprises will lobby the government legislative branch and try to lower the standard of environmental tax policy to maximize their own interests. In order to realize the real effect of environmental tax policy, effective measures...

Establishment of safety risk warning system of highway construction project can prevent accident effectively. Four warning situations have been ascertained, such as low safety capacity of highway construction project, reduction of safety capacity of highway construction project, existence of major safety...

The molten Al (aluminum) droplets collision research was conducted to investigate the collision mechanism in high temperature field. By using the 3D printing technology, the solid Al was melted into liquid by high-frequency electromagnetic heater, and the collision process was recorded by high speed...

This paper presents a 14-bit 500MSPS ADC in 0.18 um CMOS process. By interleaving two 250MSPS ADCs, a sample rate of 500MSPS is achieved. The offset, gain error and time skew between the two channels are calibrated in the background. The measurement shows that the ADC has performances of 10.6 bits ENOB,...

New ultrasonic-assisted argon-arc clad injection technology was adopted, and Ni60A was as cladding powder, TiC, TiN, WC, and Co powder as spraying powder, thus Q235 steel plate was strengthened with Ti(C N) particle reinforced the nickel wear-resistant coating. The influence of the coating thickness...

In this paper, we establish a Temporal-Spatial Distribution of Space Debris Prediction Model based on Kessler model. We deduce debris' flux and the probability that space objects be hit by debris in certain space-time. Next, we make predictions about debris' distribution with different diameters, in...

With the fresh water crisis coming people all around the world put their eye on the seawater desalination. " Asking the ocean for freshwater", has become a common choice in many countrys,which means seawater desalination becomes an important way to solve the problem of freshwater. A lot of high energy...

With development of the mobile technology, the quantity of the mobile application is also growing, and how to ensure the quality of the application has become a hot topic. Android is open platform for mobile devices, more and more developers like to develop application based on the Android system, which...

The antibacterial substance NO.026-?...?is obtained from Streptomyces avermitilis NO.026. It has significant antagonistic effect on Colletotrichum lycopersici. The stability test results showed that with the increase of temperature, the antifungal activity of active substance NO.026- I showed a downward...

The start of electrostatic gyro monitor(ESGM)requires sailing at uniform velocity and constant latitude .This is difficult to achieve and hard for the sailing . Analyzing the data of floating start base on the starting principle of ESGM .The result shows that, ESGM can use floating startmode in some...

Analysis of the seven steps of the Graph Data Modeling approach to obtain application functionality by utilizing the links (relationships) between entities (nodes) of the Named Entity Recognition (NER) entities was the aim of this study. The seven steps have two main models: the Initial and the Refactoring...

Silica gels catalysts containing undecatungstocobaltoindic heteropoly acid were prepared by means of sol-gel method. Infrared spectra revealed that the Keggin structure characteristic of InCoW11O397- anion was present in the silica gel skeleton. The regularity of the change of the characteristic peaks...

This study examined the possibility to remove color causing-compounds from effluent by pulse electrocoagulation. For better result, this work is focused on the comparison of energy saving effect at different current density, pulse frequencies. During the pulse electrocoagulation experiment using sacrificial...

Based on the principle of hydraulic mechanical stepless transmission is tracked vehicle hydraulic mechanical differential steering system can effectively improve the vehicle's steering can win, is has good prospects for development of a tracked vehicle steering model. Papers on tracked vehicle and its...

We reported a simple oleylamine-mediated method for preparation of Bi2S3 nanorod materials using BiCl3 and thiourea as reaction precursors. The as-obtained products were characterized by powder X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM)...

The relevant increase in the number of uncontrolled space debris is nowadays considered one of the main threats for future sustainability of space activities and space access. With the increase amount of space debris, space debris causes more widespread attention over the world. After analyzing the relationship...

We report on the visible-light responsive Bi-doped In2O3 nanospheres, which were synthesized via a simple solvothermal reaction between Bi(NO3)3•5H2O and In(NO3)3•4.5H2O in the presence of absolute ethanol and ethylene glycol by adding urea and annealing it at 400 0C. The effects of experimental parameters...

In this paper the three-dimensional design of animation which is based on computer software is studied. The method that is used to design the animation is introduced. Through the three-dimensional design of animation, the designers can use software like 3D-Max to animate the model and to exhibit the...

This study models the evolution of technology innovation network. Results argue that the growth of hybrid rice innovation network fellows S-curve by time; the innovation network fits preferential attachment as amended aging Lognormal distributions. And it implies that the degree distribution of the technology...

The scour process is closely related to the damage and failure of pipelines, so the study of the flow field around pipelines and the sediment transport below pipelines is especially important. Furthermore, the effects of scour propagation below submarine pipelines especially around span shoulders have...

In combination with one projectile engraving experimental facility, movement role of the facility and work principle of its parts are analyzed. And structural parameters are considered to have the most influence on the dynamic loading. A virtual prototype model is established by ADAMS (Automatic Dynamic...

Rutting is one of the most challenging and important distresses in steel deck pavement. The prediction of rutting depth is considered to be one of the most complex issues in pavement engineering. In this study, a large piece of linear track accelerated loading facility MLS66 was used to conduct the test...

According to the principle of SPC control chart, combined with the application module and service module of MES system, the SPC based MES system is realized, which contains Generation Control Chart sub module, Test Control Chart sub module, Product Field Monitor sub module, Data Acquisition sub module,...

In this work, we have synthesized N and S co-doped mesoporous carbons as highly efficient electrocatalysts to investigate the influence of annealing temperatures on electrocatalytic activity of N and S co-doped mesoporous carbon for oxygen reduction reaction (ORR) in alkaline media. The catalysts were...

For forthcoming 5G networks, Non-Orthogonal Multiple Access (NOMA) is a very promising technique. And in today’s world, Line of Sight communication is becoming increasingly harder to achieve. Hence, technologies like Reconfigurable Intelligent Surfaces (RIS) emerge. RIS-aided NOMA network is a widely...

As concrete-filled steel tube (CFST) is widely applied in practical engineering, it is also necessary to study its internal temperature in fire. This paper aims at discovering a simple method for measuring the temperature of CFST’s cross section. Through a series of tests, it is found that Abaqus finite...

Heating industry as a basic industry overall, leading effect on the development of the national economy, and is closely related to people's life. Since the founding of our country heating industry has been rapid development, but also there are very serious problems. China's building energy consumption...

At In the photovoltaic, maximum power point tracking technology is an inevitable problem. The perturbation method is simple to operate, easy to implement and so on, however, the traditional perturbation method tracks slowly and is easy to shake. This paper compares the tracking characteristics between...

A systematic study of the primary tar produced by Shubarkol coal distillation was conducted initially and demonstrated that it can be used to produce road and construction bitumen. Oxidation of coke-chemical tar allowed determining the optimum conditions (temperature and time) of the process, possibility...

This paper propose a novel algorithm to detect the center and boundary of iris in face images of low resolution for gaze tracking system. The algorithm localizes the eye accurately by face alignments and uses convolution to detect the approximate pixel of the iris center which can determines the iris...

This paper discussed that an algorithm solves the draw issue of number depth recognition. Depth recognition methods have used many fields and have wide development prospect. Many scientific research institutions and scholars are studying the depth recognition. When user writes in an MR system, a depth...

Live work on distribution network is an effective measure to avoid interruption maintenance and ensure normal electricity services. This paper mainly describes the organizational and technical measures and safety precautions for the live work on distribution network.

The research ranges of optimal operation for large pumping stations were analyzed. Energy losses of power transmission and transformation, pumping stations and water transmission should be considered when optimal models are constituted. Under the circumstances of pumping certain discharge or volume,...

In order to reduce outage time of the transformer after the single-phase fault, the fault phase is considered by using the spare device with similar parameters. However, the use of single-phase transformers with similar parameters to replace can lead some problems of operation because of the different...

Wind give the ship with sails auxiliary thrust, and the distribution route of wind energy resource has a significant impact on energy saving of ship with dual-sail. Rayleigh wind speed distribution model of Nanjing, Shanghai and Nantong city on the Wuhu to Shanghai route segments of Yangtze route is...

Along with the socio-economic development, more high living standards have being pursued by human beings. However, more time has been spent engaging in work and they have no extra time to look after their playthings (e.g., fishes, flowers). The primary objective is to design a smart monitoring and control...