Advances in Engineering Research

The contents and distributions of some heavy metals i.e., Cd, Cu, Pb and Zn in different tissues of horseshoe crabs including Carcinoscorpins rotundicauda and Tachypleus tridentatus from the Beihai coast of Beibu Gulf were investigated. The results indicated that the variation tendency of measured metals...

Around CRH380 EMU bogie assembly, considering the bogie structural characteristics, grouping, object-oriented modeling, 3D animation, multimedia technology combine design a set of virtual assembly bogie animation method using Pro/E, build three-dimensional parts assembly model and virtual assembly.3ds...

Modern large-scale gas turbine’s rotor is mainly rod fastening rotor. The contact friction force between wheels, the pre-tightening force of the rod and bearing system have an effect on the rotor dynamics. According to the structure characteristics of the rod fastening rotor, contact model is established....

Two kinds of Acrylonitrile-Butadiene-Styrene (ABS) resins (ABS749S and ABS757) were manufactured as MCPA6/ABS copolymer alloys by in situ polymerization and their crystallization properties were analyzed by Differential Scanning Calorimetry (DSC). The DSC results indicated that ABS did not change coexistence...

Silver nanoparticles (AgNPs), as a new material with good properties, has been widely used in many fields. With the increasing production and usage of it, more and more AgNPs are entering the water environment, which was suspected to impose ecological risk to the aquatic ecosystem. Based on the acute...

The microstructure and mechanical properties of AZ81 magnesium alloy have been studied by micro-analysis and tensile tests. The results showed that the alloy mainly consists of -Mg matrix, Mg17Al12. The tensile strength of AZ81 magnesium alloy is measured, The best tensile strength is 258MPa at 20 .

The plasma spraying Al2O3-13%TiO2 (hereinafter referred to as AT-13) ceramic coating on Q235B steel surface was dealt with laser remelting technique , then change of the microstructure and properties of the laser remelting AT-13 coating was studied. The experiment results show that the microstructure...

In the development of network dynamic website, PHP technology is comparatively more safe and convenient. In application, it is widely applied to update the stability of dynamic information. Through effective application operation, it can ensure effective information embedding, so as to realize the safety...

It’s an important research issue in a remote user authentication scheme for a multi-server environment. Recently, Li et al. proposed a scheme to remedy Lee et al.’s scheme to avoid the forgery attack, server spoofing attack and changing password easily. However, we find that Li et al.’s scheme is insecure...

In this paper, the internal flow field in an optical module of DUV laser was analyzed by ANSYS Fluent based on the finite volume method. The way of purging nitrogen was optimized according to the results of the analysis. After the optimization, a better nitrogen purge method was obtained, and a flow...

Regarding the current situation of E-logistics of Chinese logistics industry, there are still many problems to be concerned and resolved. This paper reviews the concepts and theoretical background of E-logistics System from previous researches. After acknowledging the essential issues on E-logistics...

In the past five years, intelligent driving technology has gradually matured, and autonomous driving technology has gradually moved towards the L3-L5 level, so the environmental perception system needs to continuously update its accuracy and stability. Sensors are one of the important ways to receive...

To study the effect of the projectile shape's influence in rotary penetration depth(RDP) of concrete target, LS-DYNA was used to simulate the process of the projectile rotary penetrating in the target under different projectile shape and different velocities. Simulation results prove that drilling-head...

With the development of market economy, complexity of market environment, strengthening legal supervision, increased operational risk and competition and other reasons, risk awareness has gradually increased in more and more industries and enterprise, therefore risk management is increasingly paid attention...

Recently a lot of projects have adopted crushed stone grouting piles to treat the soft soil foundation. As the conventional crushed stone grouting pile construction is easy to cause cement mortar to lose and poor pile body quality, this paper innovates on the conventional crushed stone grouting pile...

Five planting modes were designed to study photosynthetic characteristics, leaf area index and yield of peanut variety as Fu Hua 17 in order to provide theoretical basis for peanut yield increase in the sandy area. Results showed that the mode of peanuts planted for double rows in the border check with...

There is a certain kind of solid-state balance among individual buildings that within the same Vernacular architecture. Not all the understandings of it has formed the most common specifications and planning textbooks in current architecture, instead, some manifest as silent and hidden constructing principles...

In this work, a forward extrusion technology was developed for spur gear, which used in truck wheel redactor. In order to achieve better technological parameters combination, the finite element method (FEM) and orthogonal experiment were utilized to research the process of planet gear forward extrusion....

The process of gas-liquid two-phase flow of an IC anaerobic reactor (25L) was simulated by fluent software. Inner Cycle Flow Rate (QIC) under different volume loading rate(OLR), ratios of riser diameter to reactor diameter(Dr/D), ratios of reactor height to diameter (H/D) were investigated respectively....

As a key device to coal mining, the hydraulic pressure support is important for the safety of coal mine. Currently, most of design software for hydraulic pressure support are stand-alone version and only capable of fulfilling partial design work. They have been used for a long time and lacked software...

This paper sets the mathematical model of the single inverted pendulum,and analyzed the imperfection of PID control algorithm for inverted pendulum. Based on this case,the neural model reference control method is discussed in the paper.With the design of the inverted pendulum system with a model-reference...

The article introduced a model of water temperature distribution in bathtub. The model can be used to describe the distribution of water temperature in space. Based on the heat-transfer equation while taking temperature of each point in space into account, the authors design a model that can describe...

This paper presents a non-resonant dc magnetic field detector, which is composed of two aluminum strips and shear-mode piezoelectric materials. The operation of the magnetic field detector is based on the Ampere forces resulting from the current-carrying aluminum strips in dc magnetic field and the shear...

Photometric accuracy and precision are the most important technical parameters of spectrophotometers. In this paper, our three instruments, that is Datacolor SF600, X-Rite Color i7 and Varian Cary 5000 UV-VIS-NIR spectrophotometer, were inspected on their photometric precision for color measuring. Five...

The vehicle-terrain interaction model plays a critical role in off-road vehicle driving visual simulations. This paper present a new terrain deformation model for simulating vehicle-terrain interaction. The model simplifies the Bekker’s classic terramechanics model, and calculates terrain deformation...

Combining efficiency with previous research, this paper from the perspective of outgoing feeders start by analyzing a shipborne USB full-band solid state power amplifier VSWR test data, concluded: transmit power and there is a certain function of SWR, VSWR the frequency greater than 1.4 SSPA unable to...

With the continuous consumption of resources, the demands for energy and the consumption of non-renewable energy is growing more and more. Solar energy, as a green initiative non-polluting renewable energy, has a great prospect. But most conventional solar panels are fixed, causing the exploitation insufficient....

A graph is half-arc-transitive if its automorphism group acts transitively on its vertex set, edge set, but not arc set. Let n be a product of three primes. The problem on classification of the half-arc-transitive graphs of order n has been considered in [J Algebraic Combin 1(1992) 275-282, Discrete...

order to improve the reliability of aviation electronic sub-system in UAV, the analysis method based on Failure Mode and Effects Analysis (FMEA) is put forward. The risk factors and correction measurement feasibility parameters are quantified with fuzzy theory. Then the fault modes with higher risk priority...

Next generation network must be a situation that a variety of RATs (radio access technologies) coexist and integrate. Aiming at improving user’s QoS (Quality of Service) effectively, a mobile terminal access network selection strategy with multi-constraint conditions is proposed. Based on the preferences...

Based on the analysis of power consumption of the circuits, isolation transformers and secondary cables of traditional lighting systems, this paper proposes a long-term power efficient lighting system regarding LED airfield lamps, without modifying the topology of power circuit. New types of sine wave...

Gravitational Water Vortex Turbine (GWVT) has the advantage of harnessing hydro flow energy from the low head. Several research have been conducted to optimize the performance of this turbine type, one of which is by applying multistage rotor. This work is to study the effect of gap placement and phase...

This academic paper explores the flammability concerns associated with using the refrigerant R1234yf in refrigeration and air-conditioning systems. Since R1234yf is a flammable refrigerant, there is a potential risk of fire and explosion if there is an unexpected refrigerant leakage. The study investigates...

In order to solve the smart home electricity load optimization problem, this paper firstly analyzes the situation of smart home optimization frame and estimates the smart home electricity load model. The electricity load optimization control model is established to achieve the aim of helping smart family...

In recent years, with the development of artificial intelligence, more experts and scholars have joined in the research about facial expression recognition. Algorithms of feature extraction and facial expression recognition are put forward in succession, and each has advantages and disadvantages. A research...

In this study, two lab-scale reactors were set up and operated in this study, include a sequencing batch reactor for batch tests and a continuous predenitrification bioreactor for regular operation. Batch tests fed by Synthetic wastewater (acetate) and operated in intermittent aeration profile, demonstrate...

The model of lighting direct strokes on 10 kV distribution line in Guangzhou was built and the transient procedure was considered based on the software of PSCAD/ECTDC. The effect of arrest and ground resistance operating maintenance on lightning overvoltage in distribution networks has been discussed....

The diameter and spacing of 150 m, 200 m, 300 m stripe array on the surface of 304 steel were prepared by using M-DPSS-50 semiconductor laser device. Then, nitriding treatment on the textured surface was conducted by using well type gas nitriding furnace. The chemical composition, surface morphology...

Jianghan Basin is a typical Mesozoic-Cenozoic salt lake basin of East China, oil and gas reservoir with industrial utilization value was found in the Xingouzui Fm , Xingou Oilfield of this basin, the formation of which is closely related to the dolomite stratigraphy deposited in the salt lake. In order...

Antenna plays an important part in the satellite, the surface precision of which has an impact on its function parameter named gain. This article finds the method of decreasing the surface precision of the antenna by dividing the mesh into diverse formals. And the technique is able to improve the property...

The metering gateway table plays an important role in the electric energy measurement of power grid.The abnormal situation in the field operation will affect the accuracy and reliability of the gateway energy metering.The problems occurred in the operation are mainly related to the particularity of the...

With the development of science and technology, the application of implantable biomedical electronic devices which play an important role in biological research and medical diagnostics becomes increasingly popular[1]. Nowadays wireless energy transfer is one of the most popular research field, it can...

In this paper, by studying the principle of binocular stereo vision 3 d scanning imaging and scanning data splicing method. The author uses the binocular stereo vision method make a 3D scanning for parts and use NURBS curve reconstruction technology for reverse design of parts.

The microstructure and aging precipitated phases of Mg-12Gd-2Y-1Sm-0.5Zr alloy have been studied by micro-analysis XRD and EDS. Through the analysis it is found that the precipitated phases in the alloy contains Mg24Y5, Mg5Gd and Mg41Sm5. The tensile strength peak of Mg-12Gd-2Y-1Sm-0.5Zr alloy appears...

This paper analyzes the characteristics of image processing method based on nonlinear evolution equations, expounds the advantages, mechanism and theoretical basis of nonlinear evolution equations model in image processing algorithm, and uses the method of partial differential equation for image denoising...

A triangular metamaterial structure unit is presented and the effective permittivity and permeability parameters are retrieved from the transmission and reflection data. Simulation results show that the combined unit exhibits left-handed passband in terahertz (THz). Triangular electromagnetic metamaterial...

The Mesozoic sequence framework of the eastern Yihezhuang salient in Jiyang depression, which was a residual basin, was studied in order to improve the success rate of locating hydrocarbon reservoirs. First, through seismic profiles, well logs and cores, complemented with outcrops, totally 5 sequence...

When conventional algorithm mainly constructs CDS from a perspective of CDS scale, network energy balance issue will be neglected, making some nodes of oversize residual energy become dominating ones. Due to ultra-low energy, these dominating nodes will become inactive very soon, impacting network coverage...

Wide band gap hydrogenated amorphous silicon oxide(a-SiOx:H) films were prepared by radio frequency plasma enhanced chemical vapor deposition(RF-PECVD) method. Nitrous oxide(N2O), hydrogen(H2), silane(SiH4) were used as source gases. With the increase of N2O/SiH4 ratio from 0.5 to 2, the optical band...

Fan coal mine as one of the main equipment, electrical power, with 24h operation every day, there is a serious power consumption.Aiming at the problems of cyclone machine adjustment method, the use of 10 kV high-voltage inverter realize remote control, and have achieved good energy saving effect.

In the process of reclaimed rubber producing, the desulfurization is an important link of waste rubber recycling. It is directly affect the quality of the recycling reclaimed rubber. At present, there is no good desulfurization way for industrialization. Therefore, how to carry on the desulphurization...

The existing Cast-in-place reinforced concrete floor slab still has some shortcomings as the cracks caused by shrinkage, temperature difference and settlement of the Cast-in-place concrete are difficult to control, a large amount of on-site wet operation leads to noise and environmental pollution, and...

The electric bicycle has become the main part of non motor vehicles in small and medium-sized cities. Research on the traffic flow characteristic of the electric bicycle has important practical significance. Based on NaSch model, this paper models electric bicycle traffic flow with CA model and improves...

In this study, a series of corrosion tests are performed on 12 sliding pairs under complex marine environment and earthquake. Periodic-salt-spray accelerated corrosion test and wet-and-dry-cycle accelerated corrosion test are used to simulate the splash zone and atmospheric zone for an sliding pair....

Data Flow Analysis is a difficult issue in the domain of fault localization, and many software faults are related to the information of data flow. The dependency between the variants and the define-use chain are discussed in this paper, and trace the impact to the variants in the process of operation....

In order to solve the congestion problem caused by the more strict security check, we developed a mathematical method based on the Petri net model and the queuing theory. First, we get a linear fitting from the A column of data collected according to the queuing theory [1]. And we obtain the distribution...

This study investigates advanced operational amplifier (op-amp) architectures for gain enhancement, focusing on cascode, two-stage, and three-stage configurations in high-performance circuits. The cascode op-amp combines the high gain of common-source amplifiers with the wide bandwidth and low output...

With the increasing height of buildings, the frame-central core tube-outrigger structure system is widely used in super-tall buildings. At the same time, it becomes more and more popular to employ multi-outriggers in taller and super high-rise buildings. However, because of the fact that the vibration...

Mooring system design problem is to determine the anchor chain type, length and weight of the ball to make the buoy of the draft depth and swimming area and the angle of inclination of steel drum as small as possible. In this paper, we proposed the mooring system optimization design by mechanical analysis....

Cutting effect was unconsidered so far for Chaff Corridor (CC) both in theoretic analysis and operational engineering; different position's Blanket Efficiency (BE) of constant chaff-density CC is different as results of radar-lobes cut a chaff volume, which means there are limited chaffs which have jamming...

Auto-cascade refrigeration system using multiple non-azeotropic refrigerants, taking advantage of the difference between the evaporation temperature of high and low boiling point components, applying the single-stage compression, by the way of internal cascade to obtain a larger working temperature range,...

Internal development human resource management system is a system which originated in Japan is considered a high performance human resource management system. A large number of Chinese enterprises, especially the state-owned monopoly enterprise have the typical characteristics of the internal development...

In the past 20 years, numerous in-pipe inspection robots (IPIRs) have been designed and utilized. According to the propulsion mechanism amount, these in-pipe inspection robots (IPIRs) can be summarized into two categories, i.e. single locomotion system and multiple locomotion system. This paper presents...

In order to study the loads and responses for structures impacted by exhausted gas jets, a jet impinging plate is investigated numerically, As well as the computational fluid dynamic method are utilized to simulate the jet flow, the finite element method are imposed to calculate structure responses....

We propose a new approach based on estimating illumination veil. The algorithm for non-uniform illumination of fog image has a good result. Given a degraded image, minimum intensity of RGB components of each point can be figured out as haze energy veil with the proposed guided filter, subtracting the...

The research of this paper can help medical researchers or ordinary people understanding the internal structure of heart and providing anatomic basis for clinicopathologic analysis of heart, heart anatomy teaching, surgical planning and visible simulation surgery of heart. Based on the heart anatomy...

Based on the current situation that the ordnance soldiers are lacking a complete set of professional skill appraisal assessment data, the present on the guarantee difficulty for live-fire training, a new simulation assessment platform was designed and realized in this paper, which included the theory...

In this paper, based on the lattice Boltzmann method (LBM) and the Oldroyd-B model, the decoupled solving method for the incompressible Navier-Stokes equation and advection-diffusion constitutive equation and the boundary processing formats are given. The flow of viscoelastic fluid in the planar 3:1...

The BER performance with consideration of phase fluctuation effect in space optical communication is investigated. When the phase fluctuation effect is considered, BER definitely increase which leads to the worse communication quality. Based on numerical simulation, BER is sensitive to the higher level...

In order to overcome the defect of open-loop detection of micro-gyroscope, based on comb capacitance detection of micro-structure, the working principle of electrostatic force suppressing capacitance comb vibration was analyzed. The Coriolis signal vibration amplitude of micro-gyroscope was extracted;...

Mineral flotation is a complex physical and chemical process that involves solid, liquid and gas phase separation. Many operating variables influence the efficiency of the separation process, and the mutual coupling effects have decisive influence on flotation performance indicators, both from the macro...

A control strategy which is used in hybrid energy storage system is proposed in this paper. This control strategy has combined low pass filter with multi-objective optimization. Besides, the problems of overcharge, over discharge and limitation of maximum power are considered, which has improved the...

This article aim at solving the problem of local optimal solution easily appear in structural optimization by the algorithm of bi-directional evolutionary structural optimization (BESO), and importing improved genetic algorithm (GA), put forward a new algorithm named bi-directional evolutionary structural...

In this paper, thermogravimetric analysis method was studied in biomass thermal conversion analysis. Theoretical simulation and experimental methods indicated the problems existing in the traditional thermogravimetric analyzer (TGA). On this basis, a new thermogravimetric analysis platform was developed....

With the current distribution network automation construction gradually promotion, distribution automation terminal large-scale applied in various regions of the country power grid. In the maintenance of distribution automation terminal operation, many problems was discovered to be widespread, such as...

In this paper, a mathematical model is established to simulate orientation distribution of plant fibers suspensions in ellipsoid extensional force field. Furthermore, the analytical solutions of differential equations on plant fibers orientation can be acquired in complex flow field.

Pretreatment of lignocellulose is a key step in a commercial biorefinery. To increase the cellulose mass fractions and enhance the enzymatic hydrolysis, sugarcane bagasse was pretreated with methods of dilute acid, dilute alkaline and acid coupled alkaline. The efficiency of these three methods is compared....

This paper expounds the characteristics of Gd and Mg-Gd binary alloys, Introduces the mechanism of Gd addition on the heat resistant magnesium alloys. Reviewed the research progress in magnesium alloys containing Gd on mechanical properties at room temperature and high temperature, and prospected their...

The application of Distributed Generation (DG) reduces the consumption of traditional energy, but it also brings certain challenge to relay protection because of its own characteristics. This paper analyzes that the injection or branching current will cause incorrect operation of over current protection....

In order to integrate increasing carbon sequestration of plants into vegetation restoration and reconstruction project in Guizhou karst area, the carbon storage, spatial distribution characteristics and carbon sequestration benefits of five kinds of disposition modes were studied in Karst Peak-Cluster...

This paper analyzes the benefits and limitations of several attendance systems that have been used in universities and describes the design of an Attendance System which combines the attendance recording and dormitory management. The system described in this paper is based on MySQL and featured by synergetic,...

With the increasing voltage classes of electric system, voltage stabling issue brings more and more severe constrains to the entire electric system. A throughout analysis of features and mechanism of voltage instability in electric system has guiding significance in assuring stability of the power grid....

With distribution automation full coverage, terminal debugging and operation and maintenance has become a key factor in practical application. Based on the IEC 61850 standard and IEC 61850-80-1, Information model mapping, combined with the IEC60870-5-104 extension, the scheme of self-discovery, self-registration...

Firstly, the fuzzy comprehensive is made for each risk factor of large-scale water conservancy and hydropower engineering in its life cycle’s each stage, and the fuzzy comprehensive evaluation vector is transformed into fuzzy scores, total risk of ecosystem in different development scale and value of...

The soft soil foundation is widely distributed in our country, with the features of high moisture content, high compressibility, low strength and poor water permeability, among which the geological condition of alternate soft and hard soil layers is also common, and the constructions built on such foundation...

The temperature change in roadbed is a process of dynamic change, is the key factor that influence the performance of subgrade. In order to research the subgrade temperature changes in permafrost regions, based on national highway 219 line Xinjiang-Tibet highway monitoring project, observed the temperature...

A low cost indirect type AC voltage regulating system is proposed to overcome the grid pollution of silicon controlled regulating circuit and the high cost of chopping sine wave regulating circuits. The system consists of full bridge rectifier, filter and full bridge inverter. The bipolar SPWM control...

With the rapid development of society, improve space utilization, modern city high-rise building height are also increasing rapidly, the glass wall clean, damage detection, equipment maintenance and other aspects of the problems keep cropping up. Using robots to replace human tasks not only reduces the...

In today's electrical age, error-prevention control and automatic safety device of biogas engine system is playing an important role in modernized production and life. Based on the conclusion of fuzzy-control algorithm, after making up bugs in the above DC speed regulating device and combining error-prevention...

In this paper, we use the first law of thermodynamics to obtain a differential equation. After comprehensively consider about evaporative heat loss, convection heat loss and radiation heat loss,we develop the model to discuss the temperature of the bathtub water for different time and different flow...

Surface pits in a-plane GaN have long been considered as a result of island coalescence in literature, while pits in c-plane GaN are the surface termination of screw dislocations. It is found in the paper that small surface pits on a-plane GaN also terminate perfect screw dislocations and partial dislocations...

This paper summarizes the current methods for solving micro-channel flows, and the direct simulation Monte Carlo (DSMC) method is used to simulate the Couette flow, which is the most classical gas micro-flow. The results show that the velocity slip is obvious in the transition regimes and the slip velocity...

This paper proposed a new way of crossover and mutation for genetic algorithm to prevent the local optima and guarantee the feasibility of the mutated path. Improving the adaptive adjustment of crossover and mutation probability to improve the search efficiency of the algorithm optimization. Contrary...

In order to reduce far-end crosstalk between LTCC microstrip lines, this paper proposes a novel structure that has an air-cavity in dielectric layer. Simulation model of LTCC microstrip lines was set up by using Ansoft HFSS, the far-end crosstalk (S14) was obtained, the effects of cavity height, cavity...

To improve the inclined lane car braking reliability, in this paper, the theoretical analysis of the braking force and the brake parameters of the inclined roadway are carried out, developed a new type of hydraulic track brake device. The device use two levels of the hydraulic cylinder symmetrically...

Molecular dynamics (MD) is a method for computationally evaluating the thermodynamic and transport properties of materials by solving the classical equations of motion at the molecular level. There are many algorithms that can be used to integrate the Newton’s equation of motion in the simulation process....

There are some problems in using and managing the educational resources of colleges and universities, such as uneven distribution of resources, Inconvenient to use, data redundancy, more maintenance personnel and low efficiency. There is often a branch in colleges and universities; there are plenty of...

Hbase combine Hive application platform can analysis of huge amounts of data easily. And querying on multi-join is the bottleneck of restricting the performance. To solve this problem designing a Join Engine between Hbase and Hive. It can read Hbase data and complete multiple table joins and optimization...

This paper points out the problems existing in the existing technology of socket, we design a new type of security socket, this paper introduces the basic structure of new type socket, illustrates the implementation process. Through reforming the socket internal structure, solve the problem of the plug...