Advances in Engineering Research

Spread spectrum technology is an information transmission technology, which channel bandwidth occupied by the information that far exceed the minimum bandwidth necessary for transmission; the spectrum is ex-panded by a separate code sequence is complete, the coding and modulation method to achieve regardless...

In order to achieve the stable control for a double inverted pendulum system, linear quadratic Gauss optimal control was applied. Based on separation principle of LQG, firstly, the control law was proposed by the optimal control, and then a state feedback was obtained; whereas, the states of a system...

The airbag buffer landing device is an important part of the existing buffer device in China. Its low cost, flexible and lightweight, safe and reliable excellent features play an important role in the field of airdrop and aerospace. This paper summarizes the classification and research methods of the...

Based on the investigation of the distribution of strata in the downtown area of Guangzhou City, simulating the stress path of excavating foundation, the triaxial pressure tests on isotropic consolidation and K0 consolidation conditions, the lateral unloading tests and the axial unloading tests on mucky...

Due to the measurement noise, the accuracy of the double observers' cross-location method is low. Based on the Fisher information matrix of the double observers, the Cram,r-Rao low bound (CRLB) of the double-observers bearings-only tracking is figured out, the proposed optimal fit matrix decomposition...

The polycarboxylic slump-retaining admixture was synthesized by methyl allyl polyoxyethylene ether (TPEG) and unsaturated carboxylic acid in redox system. The factors influencing on performance of polycarboxylic slump-retaining admixture such as temperature, reaction time, acid alcohol ratio, the amount...

The anti-galloping method was proposed for the 6×1520 mm2 large cross section conductor. The galloping model was established by using nonlinear finite element method and considering geometric nonlinear, aerodynamic nonlinear and initial deformation. The galloping characteristics and the critical conditions...

With the rapid development of the mobile internet and the computer ability, the era of big data has come. This paper firstly describes the concept of big data, and then introduces the key technologies of big data in mobile communication network. Then, this paper gives the specific applications of big...

Reliability allocation is a significant part of reliability design. There are a number of factors that affect the reliability. A new method of reliability allocation is proposed based on the fuzzy theory and AHP method. The core of this method is to introduce the improved AHP method to determine the...

In the modern control system, especially the mechanical servo system, a suitable mechanical friction model is very important for the simulation verification of the control system or algorithm. At present, the traditional Dahl model has many defects in fitting the real friction and the simulation of the...

The advancement of technological society in general has stimulated in various fields, such as aeronautical civil mechanical naval and offshore engineering, a need to look for more sophisticated structural solutions. In many cases these solutions resort to lattice towers that, in order to meet several...

Magnesium-RE alloys are interesting materials since they have excellent room and high temperature mechanical properties. A recently developed as-cast Mg-5Y-3Sm-0.8Ca (wt.%) alloy exhibits attractive strength at room temperature, while its strength is poor at elevated temperature. In order to further...

Taking the DZ101 TBM(Tunnel Boring Machine) main beam as research object, with CAD/CAE used, a three-dimensional mechanical analysis model of the main beam was established. And then the static mechanical performance of the main beam was studied. The results show that: the maximum stress of main beam...

Proposed a combination predicting method based on innovation grey theory and neural network to improve the precision of spacecraft power predicting. Established innovation GM(1,1)+RBF combination predicting model with optimal predicting precision according to the spacecraft power seasonal fluctuating....

According to the needs for many people conducting a certain virtual experiment at the same time in different places, a multiplayer online virtual experiment system built by Kinect and Unity 3D engine is proposed. In this system, the Kinect is implemented to complete the motion operation, which can improve...

Uncertainty analysis of the parameters of conceptual rainfall-runoff models is studied via application of the Xin’anjiang (XAJ) model as a case study. A new research methodology is suggested. We suggest to fix a subset of insensitive parameters first, and then analyze the uncertainty of the other parameters....

To calculate a rudder system’s vibration characteristic, MSC Nastran was carried out to simulate an underwater model’s wet modes based on finite element method (FEM) and virtual mass method. The model was simplified from the rudder system using a torsion spring instead of the transmission parts. The...

TENON machining is an important and major processing for aero-engine precision forging blade. Traditional processing methods for TENON machining cannot meet the modern aero-engine performance, efficiency and environmental protection needs. In the paper, a "hard" clamping process method to machine blade...

This paper introduces energetic igniters fabricated using TaN film bridge by magnetron sputtering. It is inferred from the image of wet-etched TaN film bridge that film edge is clearly visible and relatively smooth with lateral erosion size of 5 ?m. The X-ray diffraction (XRD) and Temperature Coefficient...

In traditional Radio Frequency Identification (RFID) reader system, the electromagnetic energy cannot be transferred as much as possible, which is caused by the discrete resonance frequency of antenna. The energy transferred distance should be reduced by this reason. In this paper, Direct Digital Synthesizer...

The article presents a review of the current status of world power engineering, which is focused on the development of alternative and renewable energy sources (RES). The power resources' production and consumption tendency, as well as the evaluation of renewable energy sources usage in Russia, is analyzed....

Sand is the discrete particle material in meso level and irregular distribution of sand void space is showed anisotropy. The reasonable description of this feature is important to study on sand strength and deformation mechanism, and the anisotropy of pore space is studied by using the directional distribution...

Roadways that located around the beach often have some problems with seawater puddle caused by the tidal condition or commonly known as rob water. Therefore, it is better to apply steel slag with higher quality than ordinary aggregate as an alternative way to prevent the pavement damage. This research...

The paper considers climatic and weather specifics of the Arctic, identifying dangerous weather factors with the highest frequency. Specificity of flying in the Arctic and state-of-the-art in flight meteorology are considered. The authors define the tentative approaches to solving tasks in improving...

There are two basic models built in this paper to keep a hot bath when having a shower in the bathtub: fundamental heat-balance model and dynamic heat-balance model. A reasonable strategy to keep water temperature approximately constant and well-distributed is found in the former. The influence on water...

The excessive consumption of fossil fuels brings air pollution problem in Beijing, and integration of Beijing-Tianjin-Hebei will join a new coordinating development for future development, it will form a symbiosis pattern. How to choose the symbiosis pattern is a key issue of the development. This paper...

This paper designed the Pin-axis Resistance sensor based on the principle of Magnetostriction. The mathematic model of the sensor was established and simulated in Matlab / Simulink. In this paper , load experiment results of resistance sensor showed that resistance sensor's linearity decision coefficient...

The wireless video transmission process, due to the complexity and variability of wireless communication channels, requires the bitrates to be adjusted to match the dynamic wireless channel. An analysis of the video frame quality could be used as an important basis to adjust the wireless video bitrates....

Driving fatigue and even arm numbness can be caused by steering wheel jitters with engine idling. Objective measurement and subjective evaluation are applied of the analysis on the influencing factor of steering wheel jitter in two conditions, engine idling with air conditioning on and off. The prior...

Melody is the key perception of music. For the heavy sensory nerve deafness, the current cochlear implant (CI) user has the clinical effect on speech recognition, but the music melody and timbre perception is not acceptable, they could not normally perceive music information. Based on CI encoding principle...

We need to optimize and adjust the conventional bus network in the rail transit environment to give full play to the key role of the rail transit function and its overall benefits, to form smoothly linking combination of rail transit and conventional bus network. This paper is to analyze the defects...

In order to improve the quality of laser metal direct manufacturing parts, the Z increment mathematical model was established, and the optimal Z increment was solved theoretically. The results show that Z increment is the function of single-track single-layer forming height, and has nothing to do with...

This paper studies the Huangguogan anthracnose infected time and different concentration of 25% Pyraclostrobin EC (1500, 2000, 2500 times) in Huangguogan in different periods (before flowering, after flowering, young fruit period, fruit rapid growth period) control effect on Huangguogan anthracnose after...

In order to solve the design problem of the electromagnetic mechanism of the electromagnetic engine, a method for the design of electromagnetic mechanism is proposed by means of finite element method and magnetic circuit method. According to the structure characteristics of the electromagnetic mechanism,...

Environmental services are products of biological natural resources and their ecosystems in the form of tangible and indirect benefits (intangible), which include natural or recreational tourism services, water/hydrology protection services, soil fertility, erosion control, and flooding, beauty, uniqueness,...

Stunting is defined as a chronic malnutrition condition for children. The prevalence of children under five suffering from stunting in Indonesia in 2018 is still high at 30%, still very far from the standard set by WHO, which is 20%. With this high enough figure, of course, it will have an impact on...

Lean construction is one method that may reduce waste on construction projects. Waste is something that is non-value adding activities in the construction site. Implementing lean concepts into the construction industry is expected to increase the company’s productivity. In this study, we have reviewed...

This journal will describe how the kick handling time is reduced from the actual condition by applying Drillers The method in Well X. This well is an exploration well with the main objective at the 9,000 ft range of depth in Kujung Formation, which has been identified as a gas hydrocarbon reservoir zone....

Metal matrix composites of aluminium boron carbide have remarkable applications in gas turbine blades, aerospace, marine, automobile, aviation etc. Manufacturing of aluminium composites has many techniques, stir casting is one of the economical and very simple processes. In this present work, Aluminium...

In the context of designing integrated transportation hubs, scientifically determining the appropriate scale of diverse transportation connecting facilities holds a pivotal role. Utilizing the instance of Shengzhou Xinchang Station, we delineate the traffic functionalities and interconnectivity principles...

Solar panels are devices that can convert solar energy into electrical energy. People often install solar panels on building roofs, on open land, and even on vehicles like boats and electric cars to produce clean and sustainable electricity. Solar panels are an effort to reduce the use of fossil fuel-based...

3D printing, also known as additive manufacturing (AM), has emerged as a transformative technology that contrasts with conventional subtractive methods by building objects layer-by-layer from digital models. Since its development in the 1980s, it has revolutionized industries such as aerospace, healthcare,...

Autoclaved aerated concrete (AAC) possesses advantages such as lightweight, excellent thermal insulation, and good seismic resistance, making it widely utilized as the wall material in building structures. However, the interior environment of AAC is neutral or weak alkaline, which makes the reinforcing...

In this study, the effect of coolant flow and welding time on the joint quality in the spot welding process, especially on St 40 steel material, was evaluated. Spot welding, a common method in the automotive industry, involves the use of electric current to join metal plates by heating and melting the...

Distance protection allows you to protect power lines from short circuits to the ground. There are a lot of grounded transformers in the power system, which are a source of recharge current in case of short circuits to earth. This recharge affects the operation of distance protection and may cause non-selective...

The civil aviation transportation industry of our country is growing explosively. The hydraulic system of civil aircrafts is crucial to the whole civil aircraft. This paper focuses on the hydraulic system of civil aircraft, which includes the Relevant Parameters of Reliability, the prediction and the...

A interface equipment's design and application method is put forward, which can be used to guide related equipment vendors to complete the production and transformation of home appliances of power demand response and improve the enthusiasm of the residents participation in demand response.This paper...

In order to resolve the resonance problem of jack-up riser with drill string, the frequency equation of natural transverse vibration with compressive axial load and the length of the riser above the seabed as independent variable was derived in this paper. Then the frequency equation was solved by the...

In order to test the correctness and feasibility of high strain measured curve fitting method of pile, field tests of vertical bearing capacity of pile were carried out using prestressed concrete pipe pile. The following test results can be obtained: (1) According to the actual soil layer parameters...

With the advent of the information age, students in the day-to-day management of information will inevitably encounter some data processing problems. When the amount of data processing is large, it is difficult to meet the needs of calculation if the manual method is adopted, Accordingly, this paper...

With the development of large-scale wind turbine, the flexible deformation produced by the tower under random wind load has an important influence on wind turbine operation life. Considering flexible supporting of the tower for wind turbine and random wind load factors, the gearbox transmission system...

RTV is one of effective methods of power transmission equipment external insulation properties improving. However, the performance of RTV coating was affected by spraying operation, which was mainly artificial spraying on site. In this paper, automatic spraying equipment was developed to deal with the...

In this study, we focused on fragment of wrong lyrics that are heard or remembered wrongly and entered as query for lyric search. Concretely, we aimed to improve search accuracy by query conversion considering noise of word. We also tried to calculate word intimacy degree that indicates how much the...

The developments of information and communication technologies in combination with world-wide logistics processes can be seen as the main driver for distributed innovation processes. s. The key question is how multinational companies can manage such distributed innovation processes under the internet...

The aquifer water-abundance evaluation and classification play an important role in the prevention and control of coal mine water disasters. Based on attribute mathematical theory and similar coefficient determining method, this paper propose an attribute mathematical systematically model for the aquifer...

The consistency of power Li-ion batteries storage was researched at 20?and 40? environment temperatures. The results showed that the self-discharge rate of monomers of similar initial performance in storage will lead to inconsistency of monomer battery voltage after storage. That is to say, the battery...

In China’s energy reserves and production, the thick coal seams account for almost 45 per cent of national coal resources. It is in dominant position for coal mining. At present, mining methods of thick coal seam include slicing, top coal caving and large cutting height. Although these methods have achieved...

The narrow gap automatic MAG welding equipment in this article is a narrow gap gas metal arc automatic welding system developed by Wuhan University, which has remarkable advantages of low heat input and high efficiency. The low heat input reduces the tendency of grain coarsening and other bad non-equilibrium...

Based the present situation on the development of modern wood structure building at home and abroad, the problems including the technology lag, the single building form and the single application type of the modern wooden structure building are pointed out from the view of adaptation to climate, energy...

Wireless sensor network (WSN), which is usually composed of a large number of wireless communication nodes, is a new area of research in the field of information science. These nodes can be equipped with some sensor modules. Wireless network is an important part of the Internet of Things. With the sustainable...

The electric field distribution in the Gas insulated switchgear (GIS) gas chamber is an important factor for the design of GIS structure. The electric field distribution in the GIS gas chamber should be uniform as far as possible, to avoid excessive concentration of the electric field causing the occurrence...

Tuberculosis (TB) is known as an infectious disease caused by bacterium Mycobacterium Tuberculosis. It is one of the highest diseases that occur in Indonesia. The lung disease can be identified by analyzing the x-ray image of the lung. The problem that followed is that the x-ray images were analyzed...

This work demonstrates the use of the digital speckle correlation method to analyse the deformation of the metal aluminum films with glass substrate under temperature field. Our results can be adapted to further extend the applications and provide important reference for the designing of the key coating...

The intelligent dressing equipment, the important development direction of future mobile computing form smart helmet is one of the important equipment of intelligent wear equipment form, it is a multidisciplinary integrated embodiment of cutting-edge technology.This article mainly introduces the design...

This talk introduces the most widely used modern life science research, and its new developments in the 21st century, discovers the formation, breakthroughs, and developments of computing life science, discusses the carrier of computing life sciences, the ramification of biological mathematics, mathematical...

In order to study the optimal ratio of compound suitable for crop growth ,analyzed physical and chemical Characters and crop yield of compounded soil with feldspathic sandstone and Sand (proportion: 1:1, 1:2, 1:5) by plot test. The results showed that as the content of feldspathic sandstone decrease,...

It is a significant topic of the development of Chinese macro economy in medium and long term to build high-efficiency modern energy system and balance the relation between ecological environmental protection and development of economic society. Based on the theory of sustainable development, the domestic...

nano generator is a kind of generator based on nanometer magnitude, which can transform certain form of mechanical energy into electrical energy. In this paper, the current research status of nanoscale generator is reviewed, the classification and working principle of nanoscale generator are explained,...

The research on the implementation of the lessson study aims to obtain information on students' readiness in learning mathematics based on their cognitive style. There are two students' cognitive styles, field dependent and field independent cognitive styles. The method of obtaining information on students'...

It is well known that the traditional evil waveform evaluating method for Binary Phase Shift Keying (BPSK) or Quadrature Phase Shift Keying (QPSK) is the 2nd Order Step (2OS) thread model adopted by the International Civilian Aviation Organization (ICAO). Although there are some new methods to evaluate...

The wedge-raceway contact mechanical model, considering centrifugal force of wedge and the eccentricity of the inner ring and the outer ring of the one-way clutch, is established based on Hertz contact theory. The normal contact stiffness of the sprag one-way clutch is calculated by Newton iterative...

The porous carbon materials were prepared by the following processes of evaporation induction self-assembly (EISA), thermal polymerization process and calcination step at high temperature with the nano-zinc oxide as a hard template and phenol resin as carbon source. The as-prepared porous carbon materials...

Inductively coupled plasma optical emission spectrometric approach(ICP-OES) is used to determine the cadmium content in pyrotechnics used for fireworks and firecrackers. Element of cadmium is commonly found as impurity in chemical materials used for pyrotechnics in fireworks and firecrackers. Statistical...

The measurement result representation must contain both the value to be measured and the measurement uncertainty associated with the value, which is complete and meaningful. When the pavement permeability coefficient is measured on the road, the measurement results are given to the pavement seepage coefficient,...

Micro-blog has become a channel to obtain the information. The methods of obtaining microblog data are becoming less. With the upgrading and renewal of Sina API, the channel accessing the data sources is limited. From the current situation of data acquisition, the author tries to analyze the best way...

In this paper, the durability test of concrete structures is carried out, and the test results are counted and analyzed. Based on the calculation model of the amount of steel bar corrosion in concrete, combined with the atmospheric environmental parameters and testing data of the service of the concrete...

Today, the area of open sands in Kalmykia is 126.2 thousand hectares according to the data of deciphering satellite images. Desertification creates many socio-economic and demographic problems not only in the areas of desertification, but also on adjacent lands. The ecological ties of desert and semi-desert...

Banggai Kepulauan (Bangkep) Regency with an area of 21,988.56 km2, 30% of its territory is land, namely Peleng Island and several small islands, while the other 70% is in the form of sea. A small portion of the region experiences drought during the dry season and its geological factors, but in the next...

The Building Information Modeling (BIM) Repository is required to adapt to its users who access BIM objects independently through the Common Data Environment (CDE). BIM objects are not always easy for all users to understand and misperceptions may occur due to users’ varying abilities and learning styles....

The MDO Purifier aircraft is a very important auxiliary aircraft on board ships. This aircraft uses the basic principle of differences in the specific gravity of a substance so that these substances can be separated perfectly or in another way using the centrifugal principle. This part of the chapter...

There was flood event that occurred on January 30th, 2021 in Kuta Mandalika Lombok. There were many infrastructure damages but no injured people were reported. According to information, this January flood is the biggest flood that occurred in Kuta Lombok. The research method consists of is field survey...

The Group silo cement storage facility is an important facility for large modern cement producers and its architectural features are crucial to the quality and efficiency of the project. Based on the cement storage facility project of Indonesia Nanga Conch 2×3200t/d clinker raw cement production line...

Understanding how vegetation changes over time and across different areas is important for assessing ecological health and planning land use, especially in places experiencing rapid environmental shifts. This study looks at vegetation patterns in the Sylhet Division of Bangladesh using NDVI data from...

On the basis of field coastline investigation and high-resolution satellite images, an ESI database was established for Dapeng Bay and shorelines around it in Shenzhen by applying the Marine Oil-spill Emergency Response Decision Support and Dispatch Command System in this paper. An oil-spill shoreline...

A pot experiment was conducted to study the effects of exogenous abscisic acid (ABA) on photosynthetic characteristics of radish under aluminum (Al) stress. Five treatments were used in the experiment: seeds were soaked with 0 (CK), 1, 5, 10 and 20 mol-L-1 concentrations of abscisic acid solution. The...

According to the atmospheric information collection system has its own characteristics, to design a collection for long uninterrupted data transmission packet intermittent, low-power wireless sensor networks, and can automatically identify low energy equipment, restructuring forwarding path to extend...

In this paper, the use of ultrasound-assisted extraction of polysaccharides from Gracilaria discussed ultrasonic power, ultrasonic time, four factors affect the extraction temperature and ratio of liquid to solid on the extraction rate, test results show that: with the increase of liquid ratio, the dragon...

Face recognition has been a hot issue in the flied of computer vision, and face recognition is increasingly applied in the actual life. However, some low dimensional features such as Gabor, LBP, SIFT couldn't achieve a good performance of face feature presentation. So an algorithm which based on the...

With energy crisis and environmental crisis become more serious, photovoltaic energy storage system has increase development. In this article, the virtual synchronous generator second order model is introduced to provide control strategy for photovoltaic energy storage system. The simulation model is...

Abstract: The resulting background of medical virtual simulation technology and the advantage of application in clinical medicine training are analyzed, and emphatically introduce and discuss application research of virtual simulation technology in clinical skills training and assessment.

How to accurately and comprehensively unveil the toxic effect of graphene on the cells have always received extensive attention by many researchers. Owing to the opposition results in classical assay approaches, some researchers have attempted to adopt advanced analysis techniques. Our group successful...

The Fenton reaction under thermal-assistance was applied to the removal of chemical oxygen demand using chromate (COD) and color from dye wastewater in which initial COD was 5600-13000mg/L. The reaction temperature and time were 50 and 30 min. The initial concentrations of H2O2 and Fe2+ were 6g/L and...

In order to realize the accurate recognition of cucumber disease, the disease position of feature extraction is a crucial step, this study using computer image processing technology on cucumber disease image preprocessing and feature extraction. Using professional image acquisition device to obtain the...

This paper presents the intrinsic fluorescence characteristics of vitamin B1, B2 and B6 measured with 3D fluorescence Spectrophotometer. Three strong fluorescence areas of vitamin B2 locate at ?ex/?em=270/525nm, 370/525nm and 450/525nm, one fluorescence area of vitamin B1 locates at ?ex/?em=370/460nm,...

Soil parameters have important impacts on the response to earthquake damage. Refraction microtremor (REMI) method is of practical Refraction microtremor method uses the conventional seismic recording instruments during the progress of seismic data acquisition. It takes about 40s in one acquisition, which...

In this paper, we investigate the scalability of OpenFOAM for the viscoelastic solver which is implemented in our previous study on HPC platforms. Results show that the solver scales reasonably well up to 256 cores. Further profiling shows that the scalability is greatly restricted by global reduction,...

One of the ways of solving the problem of organising transport and technological service of oil-and-gas production processes is considered in the paper. The authors propose analysing the operation of the system of transport servicing of electric power generation management, when extracting oil and gas,...

With the development of mobile internet and the expansion of human interaction and communication requirements, mobile social networks are beginning to influence people's lives. Social networks have been widely used, but the problem of trust has always been the bottleneck that restricts the further development...

On the premise of fixed slurry consistency and concentration of sodium silicate, adjust proportion design of fly ash content 8 groups, cement-sodium silicate double liquid grouting material experimental study and mixture ratio design, through the collation and analysis of experimental data, concluded...

The carbonate foundation creep has significant difference between natural and moist condition under stress. Through field test of high fill carbonate foundation, it has shown that rocks have been in a long-term moist state, the total settlement of rocks creep in the moist state are significantly greater...