Advances in Engineering Research

For further study on the principle and characteristics of multi-terminal VSC-HVDC system under the condition of the AC/DC hybrid power grid, firstly, this paper establishes the model of three-terminal VSC-HVDC system based on PSCAD/EMTDC. Secondly, according to the different transmission properties between...

This paper is to propose a management method of distribution network's wide-area reactive power control with low voltage-violated buses. The concept of voltage-violated bus was proposed, and based on this concept, the distribution network's reactive power control with low voltage-violated buses was established....

Assembly line is widely used in manufacturing system and assembly line balancing problem directly affects the productivity of the whole manufacturing system. In the actual situation of assembly process, optimizing a certain goal in the process of actual assembly individually may cause the neglect of...

For the uncertain change characteristics of transition matrix parameters in complex FPN system,this paper presents a parameters optimization algorithm based on CDEDPSO.This article focuses on the weight, threshold and certainty of FPN optimized model and these parameters are analyzed, improved and simulated...

In Vietnam, now many hydropower project adopts the EPC (engineering, procurement and construction) of the contract. However, in the implementation of these hydropower projects, the EPC general contractors are facing many difficulties, resulting in schedule delays and considerable losses . From the above...

Intelligent material is widely used in the semi-active vibration control systems due to its the advantages as simple control, responding quickly, easy control of characteristic parameters, low power consumption and strong robustness. In this paper, the damping device for machine tool based on intelligent...

Through the research on automated testing framework, the efficiency of automated testing can be improved, and the problems in the testing process be solved. The PATF framework provides a good solution for automated testing.

The air samples in two different stages (high temperature sterilization stage and fermentation stage) of penicillin fermentation workshop were sampled in fermentation process to investigate the pollution level of VOCs in fermentation exhaust. Results showed that the staggered variation of VOCs in penicillin...

Lead-rubber bearing (LRB) has small horizontal resistance under creep loads, and its post-yield stiffness reduces quickly under seismic excitations, while the hysteretic behavior of lead core dissipates the seismic energy; Fluid viscous damper (FVD), which is a speed-related energy dissipation device,...

Many marine bays have been polluted by various pollutants including Cr, and therefore understanding the migration rules and theories is essential to pollution control and environmental remediation. Jiaozhou Bay is a semi-closed bay located in Shandong Province, China. Based on the research on the distributions,...

This paper proposes a general overview of existing technologies and methods of organization of disassembly of end-of-life vehicles at the end of their operational stage. The experience of countries with the most effective ELV recycling systems has been analyzed in order to develop recommendations for...

In this paper, the Nostoc 106 has been taken as the test algae and the antioxidant effect of ascorbic acid in the process of killing cyanobacteria by UV-C radiation has been discussed through employing the ascorbic acid as the experimental subject. At the same time, the resistance effect of ascorbic...

The living environment is the base of the survival and development of human, its sustainable development is directly related to the extent of human life and it is one of most important content that measure the progress of human society and culture development. With the rapid development of economy and...

With the progress of the society and the development of information and communication technology, information system is rapidly expanding in various industries and fields. There are more and more data that these systems collect, process, and accumulate, and the growth rate of data volume is larger and...

With the decrease in the over ground utilizable space and increase in growth of metro structures, cut and cover structures are becoming rather impossible to conceptualize and construct. Hence they are slowly replaced by underground openings made by NATM methods. These tunnels could be using rock bolts...

A modified cup-burner apparatus with a vibrating-spiral micro feeder was developed for testing the extinguishing performance of superfine powder fire extinguishing agent (SPEA). The suspension velocity of SPEA particles was calculated using the suspension-grade-model (SGD). The formation mechanism of...

Continuous roll forming is a new sheet metal forming process for three-dimensional surface parts. In the process, the sheet metal is thinned non-uniformly in transverse direction by controlling the distribution of the gap between the upper and lower forming rolls, the longitudinal elongation is different,...

A design system for the sprout vertical cultivation device has been developed with Visual Basic and SolidWorks redevelopment technology. This system features a simple user interface and easy operation. Practical applications show that the system can work out the manufacturing materials required and update...

A mathematical model of the system of seismic vibrations, which consists of the flood dike of tailing dump, deposit material (tailings) and bottom ground layers, is developed. The model is represented as a contact boundary problem for the differential equation of shear-viscous lateral vibrations of the...

The main purpose of this research is to test the consistency of Big Five Personality Plus dimension and indicator on Mompreneur in Pangkalpinang City. The research method used is descriptive-quantitative, with respondents mompreneur in Pangkalpinang City who has a culinary business of 60 people. The...

A new classification method based on binary coding is proposed for composite information consisting of a variety of basic information types, which takes the composition of composite information into account at the initial stage of design, so it has high efficiency and good scalability in search operation,...

Voltage transformer (PT) is an instrument transformer, which is used to transform voltage on line. Chaoyang power supply company has occurred two 10kV three-phase five column voltage transformer burnt out accident. From the angle of accident analysis, the cause of the accident is analyzed. The main reason...

The small sugarcane harvester is the main model that it is fitted for hilly areas, but it is vulnerable to conveying failure. To breakthrough the limitation of individual harvester`s structural improvement traditionally, Traditionally structural improvement to the individual harvester is not generally...

To manage fishery resources in Indonesia with the principle of sustainability, it is necessary to apply the eco-fishing port concept. This study aims to develop a model for assessment of eco-fishing port with prevailing conditions and regulations in Indonesia. From the model that prepare, the application...

The article proposes a complex scheme of processing of fruit and berry and animal raw materials as a valuable source of physiologically valuable ingredients in human nutrition. The chemical composition of the powder of reindeer antlers and juice and phyto-powders of berries, cranberries was carried out...

This study aims to produce learning tools that are feasible to be used in the learning process. Learning tools developed are oriented towards guided inquiry models that aim to train students' scientific literacy skills. Learning tools consist of syllabus, lesson plans, student worksheets, and assessment...

Asphalt pavement is easily suffered from early damage under exposure to the natural environment. Regular pavement performance monitoring is mostly based on laboratory test, which could not simulate the actual pavement conditions effectively. Thus it is significant to develop an accelerated test facility....

The flowing bottomhole pressure (FBHP) of gas wells was affected by many factors. Although a lot of research works have been done to predict the FBHP and at least more than ten models were proposed, but no one can effectively provide an accurate results for all ranges of production data and conditions...

This paper introduces the method to calculating fractal dimension of aggregate. Analyze the fractal character of asphalt mixture aggregate. For dense-graded aggregate, the distribution of particles has one fractal model. But for gap-graded aggregate, the distribution of particles has two different multi-fractal...

To provide reference and according for further coating optimization, shorting process cycle and raising project benefit , the influence of curing agent content on the viscosity, applied time, hardness, combining power, drying time and corrosion resistance of the stainless steel flakes epoxy intermediate...

The forming process and SET-RESET mechanism of Pt/TiO2/Al resistive random access memory (RRAM) are investigated. Forming process was implemented by consecutive voltage sweep instead of one-step operation. After forming process, bidirectional self-rectifying characteristics was exhibited. In following...

With the rapid growth of China's economy and the development of industry, the demand of power quality in various departments of national economy is more and more strict. In the power system, reactive power plays a special role. The research on reactive power optimization of power system has significant...

The mechanical and pressure-sensitive properties of nano-Fe2O3 cement paste were experimentally studied. The experimental results showed that, except at the 7-day age, the compressive strength of cement paste doped with different amounts of nano-Fe2O3 measured at the 14-day and 28-day ages had a steady...

This paper investigates complementary filter de- signed for attitude estimation for low-cost inertial measurement unit and magnetometer. An error allocation strategy which focuses on two weight parameter matrices regulated according to output modulus of accelerometer and magnetometer auto-matically,...

This study aims to determine the user’s response to applying a web-based four-tier misconceptions instrument on the topic of work and energy (FTWEI). The method used is a mixed-method with explanatory sequential design. The subjects in this study were 30 high school students in grade ten who responded...

The reuse and recycling of plastic waste remain significantly below desirable levels, with uncollected plastic waste constituting 40% of the total, often ending up in landfills, clogging water bodies, polluting streets, and contributing to the plastic crisis. While the Indian government reports a 60%...

The increasing demand for high-efficiency power conversion in grid-connected systems has driven the development of advanced converter architectures. This paper proposes a novel grid-integrated power enhancement framework based on an 11-level cascaded H-bridge converter integrated with a Solid-State Transformer...

In recent years the molecular biology technology had achieved some development in national related areas; the environmental microbiology research offered some support to the molecular biology technologies. Since the environmental microbiology researchers achieved better improvement in prevention and...

In order to improve the reality of substation training environment, a 3D training system is developed to train operators' operating skills and ability to deal with accidents by means of a virtual reality environment. Functions, architecture, key technologies and application of the substation simulation...

Linear electro-mechanical actuator is used as a core component of large space mechanic and its position is measured by resolver. Velocity of the linear electro-mechanical actuator is calculated by the position data using the simple difference which always caused the phase lag issues. In order to reduce...

A new type of control system for the deicing robot on high voltage transmission line is designed in the article. Using the control system, the deicing robot can not only get rid of the ice of transmission line effectively, but also can detect the basic information, and comprehend the deicing and line...

The presence of nitrogenous substances in wastewater discharges has attracted attention because of the role of nitrogen in eutrophication of receiving waters. Nitrogen removal is an important aspect of present day wastewater treatment processes. However, conventional nitrification–denitrification treatment...

According to the space-volume average modal,the elastic modulus is estimated by the mineralogical composition and its content.This paper discusses correlation between mineralogical composition and elastic modulus of clay rock for geological repository at home and abroad.Some general conclusions are drawn...

This paper focuses on the full-duplex relaying with co-channel interference. Some closed-form expressions for outage probability of a decode-and-forward relay system are derived and the independent but not identically distributed Rayleigh fading is assumed. The analytical results are compared with the...

Ginseng is a rare medicinal medicine, has a long history of medicine. To the modern research on ginseng deepening, especially on the composition of ginseng in-depth analysis. Related research found that ginseng contains a variety of chemical composition, including protein, amino acids, vitamins, alkaloids,...

The nanograde particles of magnesium hydroxide [Mg(OH)2] with lamella morphology were synthesized by the method of electrodeposition. The effects of operation parameters, such as Mg2+ concentration and electric current density, interpolar distance and Na+ concentration on current efficiency of synthesis...

Site amplification is important in ground motion prediction. It describes the effect of soil sites on ground motions. The quarter-wavelength approximation for computing site amplification has been developed for several decades. It is validated by the data from the main shock of 2011 Tohoku-oki Earthquake,...

The coal bed methane (CBM) content is often relatively high where the immediate roof and floor of the coal seam are mudstone. In order to predict the CBM rich region, position of coal seam roof and floor and distribution of sandstone and mudstone are based on acoustic wave impedance inversion and pseudo-acoustic...

In order to improve the charging efficiency of photovoltaic power generation, Photovoltaic controller adopts STM32F103 as the main chip, Hardware IGBT power (IKW40N120H3), Three-phase alternating BUCK/BOOST circuit in parallel, The variable step disturbance observation Maximum Power Point Tracking (MPPT),...

The high voltage power metering system is mainly composed of a current transformer (CT), voltage transformer (PT), consisting of two wire electric energy meter and connecting them. In the high-voltage power metering system, current transformer is important electrical equipment. Structure of current transformer...

the main purpose of this article is the review of abilities of autonomous robots group application for monitoring of oil platform condition. The article contains functions performed by the robots group; the composition of the robots group; robots’ system firmware and possible robots’ location on an oil...

Pigments of Forsythia flowers were facilely extracted. Ultraviolet-visible (UV-Vis) absorption spectra of nanocrystal TiO2 film sensitized by Forsythia dyes, and photoelectric property of natural dye-sensitized solar cells (DSSCs) confirmed that the strong capacity of Forsythia visible light absorption,...

The development of thermal insulation materials that can be used in modern wooden houses noticed a large shift. But there are also some negative aspects which affect long-term quality of the thermal insulation properties. Influences as poor implementation or improper design are a problem that can be...

In order to evaluate the condition of the high voltage circuit breaker (HVCB) operating mechanism, a method based on the coil current (CC) waveform of the operating mechanism has been studied in this paper. A finite element method (FEM) with high accuracy has been used to establish an electromagnetic...

Finger recognition is an important basis of natural human-computer interaction, but existing researches are mainly on bare-hand finger recognition. Due to the fact that people need to wear gloves because of cold weather, working environment, etc, this paper presents a method to recognize gloved fingers...

The use of non-linear and time-varying electronic devices, such as rectifiers and inverters, makes the current waveform of the grid seriously distorted. The harmonics generated by those devices have bad effects on the generation and transmission of electric energy. To deal with these problems, a novel...

Three kinds of thermoplastic polyimides (TPIs) were prepared by pyromellitic dianhydride (PMDA) and three different flexible diamines, respectively. The micromorphology, thermal properties and mechanical properties of prepared samples were tested and investigated. FTIR confirmed the successful preparation...

Vision saliency detection has been applied in image preprocessing steps. The purpose of this paper is to introduce the research direction of image saliency detection and introduce the performance evaluation criteria and datasets of the model. Then investigated a variety of methods, introduced various...

Measurement of natural radioactivity in soil samples collected from Aizawl district, Mizoram, was carried out using gamma spectrometer 5”X 4” NaI (Tl) detector. Soil samples were collected from 15 different sites located in various parts of Aizawl district. The activity concentrations were measured for...

In order to research on the transport of chloride ions in prestressed box girders under coupling action of salt fog and fatigue loading, the volumetric strain and porosity as the intermediate variables, coupled processes was established based on the fatigue damage criterion. And compared with the related...

The article presents an algorithm of forming dynamic table of routs for multimodal passenger transportations. The algorithm selects the optimum route using one of criteria: fare, travelling time, comfort level. It is shown that the proposed method can find routs with minimum number of transfers. The...

Flanging is quite actively used in the manufacturing of workpieces with necks. Its prevalence in production explains the fact that there is a huge number of Russian and foreign researches discussing this operation, which unfortunately do not take into account the influence of the mechanical properties...

A numerical model of flow and temperature field in an air-cooled refrigerator freezer was established by CFD method and was validated by experiments. The results show that the simulation temperature is slightly lower than the experimental results; the maximum relative error is 1.89%. The numerical results...

Using investigation on As in Jiaozhou Bay in April and July 1981, this paper researched the vertical distribution and seasonal variation of As contents, and defined the mechanisms. Results showed that As contents in surface and bottom waters were both in order of spring > summer. The sedimentation of...

The text detection of advertising images is of great significance in current economic life. The traditional method of text detection often omits words or wrongly detects the text. In this paper, the deep learning algorithm is introduced to detect the text in the online advertising images. Based on the...

This paper explored the thermal performance of evacuated tube solar collector with/without a semicircular compound parabolic concentrator (CPC). The configurations of tested systems were: (1) the system without CPC, (2) the system with Model A CPC (3) the system with Model B CPC. This work investigated...

The change of water condition directly influences the composition and succession of regional vegetation communities. In this study, the Xiliaohe Plain was selected to systematically analyze the succession of vegetation's ecological pattern under the change of water condition in semi-arid area. Based...

In this paper, we have considered a phytoplankton-zooplankton system with toxic liberation delay. Firstly, we give the critical values of transcritical bifurcation. Then, we derive the normal forms and their unfolding with original parameters in the system near the bifurcation point by the normal form...

This work’s purpose is to study the industrial composting of organic waste as an environment for the development of research and production cooperation. The problem of the organic waste processing of the agro-industrial complex and housing and public services is one of the key factors of environmental...

The planned housing has been phenomenally developed in some big cities in Indonesia, included Yogyakarta. The housing has been built in various models as government’s policy for getting equity in diversity and for reducing housing backlog in Indonesia. The housing policy that is relevant to the problem...

In developing economies planned obsolescence (PO), and electronic waste (E-waste) are live topics of environmental and public health discourse, and this study serves to explore whether sustainable engineering practices (SEP), full utilisation of the lifespan of products, and enhancement of circularity...

A supercapacitor is a device used to store energy through electrochemical processes. Supercapacitors are used in many applications, such as batteries for electric cars. The material used for the electrodes determines the performance of the supercapacitor. Activated carbon is one of the most commonly...

Many researchers have studied the various properties of selfcompacting concrete (SCC) with the addition of several types of powders, utilizing both traditional and statistical (mathematical) methods. The novelty of our research is to use the response surface methodology (RSM) to develop a mathematical...

This study combined ANFIS with a bacterial foraging optimization algorithm (ANFIS-BFO) to predict the daily suspended sediment concentration based on the daily series data observed at the Rio Valenciano hydrological station near Puerto Rico, USA. Meanwhile, ANFIS with grid partition (ANFIS-GP), ANFIS...

Ground motion duration can significantly influence the dynamic response and cumulative damage of structures. To investigate the influence of ground motion duration on structures with pinch degradation behavior, this study used the seismic design spectra as the target spectra, and the spectra matching...

To improve the anti-crack performance of Al-Cu alloys, the geometries, relative stability as well as growth strategies of AlnCu (n=1-9) clusters were investigated with spin polarized density functional theory: BLYP. The results reveal that the Cu atom tends to convergence aluminum clusters to close-packed...

The choice of gas mediums will affect the reflected shock pressure and temperature during analyzing the shock tube. Different mediums in driver and driven section result in the Mach number disparity in the process of shock wave propagating, adversely affecting the reflected shock wave. Based on the ideal...

Android system is the most widely used smart phone operating system at present. As the Android system is a Linux based open source operating system, so anyone can operate it on the smart terminal, which brings seri-ous security problems. A security reinforcement scheme for mobile applications based on...

Using a chemical-ultrasonic process, a modified cellulose nanofibers aerogel, graphene oxide/cellulose nanofibers aerogel (GO/CNF) aerogel, was prepared, which was applied to adsorptive removal of sulfamerazine from water. The SEM, XRD and FTIR were used to characterize the GO/CNF. The as-prepared GO/CNF...

Corrosion can remain a huge obstacle to the rehabilitation project of Missan Oilfields in Iraq, which is detected with high corrosive H2S/CO2 contents. To minimize corrosion risks in the annulus, a packer fluid has been set between the tubing and the casing above the production interval, and to fill...

Complicated geological conditions and high level ground stress are often encountered with challenges in the construction of underground caverns. It is a key problem to ensure the stability of surrounding rock during construction and operation. The numerical method can be used to simulate and predict...

This paper design of a electronic code lock circuit under EPC system network. the system mainly including the minimum system SCM, password input matrix keyboard, password storage circuit, unlock circuit, LCD display circuit, buzzer alarm circuit and VD indicator circuit. The main program flow chart complete...

In this paper, tyred wheel dynamic response to road excitation during rolling has been simulated using finite element modelling in a graphical programming environment. The actual contact is an area not a single line and the contact edges are subject to continuous impacts during the rolling. The structural...

This paper presents the results of investigations recently done by our research group that improve the properties stability of GMI sensors by exploring the giant magneto-impedance (GMI) and the GMI-hysteresis of Co67Fe4.5Cu1Si12.5B15 amorphous thin strips, which was the most promising soft magnetic material...

With the rapid development of information technology, the popular online shopping came into being, which have lead to a huge number of online shopping packaging waste, and become an important source of environmental pollution in the world. In this paper, the present situation and main problems of online...

This paper investigates the wear mechanism of WC (tungsten carbide) drills in drilling titanium alloy (Ti-6Al-4V) with graphene oxide suspended cutting fluid and conventional coolant. By analysing cutting forces and examining the worn surface of the drills, wear progression in the cutting experiments...

This study investigated the use of nanoscale bilayers assembly for superhydrophilic and superhydrophobic surface modification on stainless steel plate. This study performed nanoscale bilayers assembly method ,as well as chemical vapor deposition (CVD) to perform fluorosilan treatment on the modification...

Graphite phase carbon nitride (g-C3N4) as a novel semiconductor photocatalysts attracted widespread attention in recent years. In this paper, the lamellar g-C3N4 nano-materials prepared from solid urea was used as a photocatalyst to degrade the simulated dye wastewater under visible light irradation....

With the rapid development of PV charging station with storage system, due to the inadequate utilization of solar energy in traditional off-gird charging stations and grid-connected charging stations, this paper present a novel connecting and off-grid PV charging station with storage system, which with...

With the popularity of the Internet of Things technology applications in various fields and the continuous improvement of technical level, the intelligence level of China's medical equipment industry is also growing. For example, the infusion monitoring system in the application of intravenous fluids....

Tin dioxide is one of the most promising anode materials for the next generation rechargeable Li-ion batteries owing to its high theoretical capacity (782 mAh g 1). The flower-like SnO2 clusters were successfully prepared via a facile one-step hydrothermal method using sodium stannate as a Sn source...

In this paper, we discussed the problem of two-dimensional (2D) direction of arrival (DOA) estimation for non-uniform L-shaped array, and for this, a low complexity multiple signal classification (MUSIC) algorithm is proposed. The proposed algorithm uses two one-dimensional searches to achieve the joint...

This paper synthetically analyzes and compares classical denoising methods, discussing their respective field of application, their denoising performance and influencing factors, etc. We summarize the advantages and disadvantages of these methods. Finally, vibration acceleration signal sampled on Diesel...

Hydrogen is very promising as engine fuel due to its excellent combustion and emission characteristics. In order to improve the emission of a spark-ignited gasoline engine car a set of hydrogen injection system was added to its gasoline engine and the engine can be fuelled with gasoline, hydrogen or...

The emissivity of different topographies of iridium films which were obtained using Ir(acac)3 (1.216×103 Pa) and hydrogen (5.575×104 Pa) in a cold-wall reactor at atmospheric pressure was studied. The bigger size the grains are, the uneven topography is obtained, the higher the emissivity is. The bigger...

It has been proved earlier, that boriding improves cobalt durabil-ity and that of the alloys under study during treating at room temperatures. The present paper describes the influence of diffu-sive boric coatings on the mechanical properties of cobalt alloys during treating at high temperatures, as...

In mining minerals by open-cast method, the environment is exposed to a powerful man-made impact, a significant part of which is associated with mass explosions during rock crushing. In preparation of rocks for excavation by blasting, a significant amount of dust and gases is emitted into the atmosphere;...

To achieve the green backfill of an abandoned open pit mine with a large difference chute process system, Fushun West open pit mine is used as the research subject. Based on the theory of gas-solid two-phase flow and the characteristics of large difference chutes, FLUENT numerical simulation software...

The traditional collaborative filtering algorithm has no overall quantitative understanding on users' preference. This paper proposes a collaborative filtering algorithm based on improved recommendation sorting. Based on the traditional collaborative filtering rating prediction, three kinds of weighted...

The development of underwater wireless sensor networks (UWSN) is attracting more and more attentions. The MAC layer protocols which are the important part of the network, dominate the method of each node sharing the channel, thus affect the performance of throughput, latency, energy consumption and other...