This paper reports an application of Numerical Weather Prediction (NWP) in the heat load forecasting field. The NWP is applied to obtain the correlated weather parameters of the heat load, and then the properly structured Artificial Neural Network (ANN) model is designed to perform the prediction. Satisfactory...

Although motor synchronization control system has already met high precision and high synchronization control based on virtual main spindle and relative coupling, it’s time-consuming to set parameter when most popular algorithm PID is applied in speed compensators to control relative coupling. To solve...

The flashover of polluted insulator is one of the serious problems which should be taken into account in the design and coordination of high voltage insulation. In order to clarify the influence of umbrella shape configurations on the pollution flashover characteristics of AC suspension porcelain insulators,...

This paper proposes a new procedure for out-of-step protection through the combination of a three-impedance element model with equal area criterion. The curve of the system is transferred into curve and then curve is applied to forecast whether the oscillation between the generator and the power system...

Merging unit timekeeping performance in the loss of synchronization signal, directly affect the synchronous acquisition of merging unit. At present, the test is only a test of pure time error. Further, the time error and the relationship between the synchronous sampling was not detected. This article...

Maximal frequent itemset is an important representation of frequent itemset. This paper focuses on how to achieve the maximal frequent itemsets over databases by sampling technique. We use a tree-based data synopsis to maintain the frequent itemsets, based on which, an efficient algorithm SMFI is proposed....

Zma1158 protein, consisted of 386 amino acids, was analyzed by bioinformatics tools. The result showed that Zma1158 was a typical NAC transcription factor in maize, and it may involve into abiotic stress response for the stress related cis-elements that detected in the promoter region of Zma1158.

The output of the PV array capacitance change influence the output efficiency of photovoltaic power generation system. The study of the circuit is a stand-alone photovoltaic power generation system, theoretical analysis and simulation results can be well combined with the PV array output suggests adding...

This paper describes a general relay system on the condition of a given bit-error-rate(BER). The message bits are transmitted with the assistance of a relay node using one-way amplify-and-forward(AF) relaying protocols, and the effect of modulation rate on energy efficiency (EE) is studied. First, we...

Based on the analysis of the existing Analog-to-Information Converter (AIC) under the framework of Compressed Sensing (CS), a novel model called the Parallel Multi-Filtered AIC (PMF-AIC) is proposed. In this model, the ideal integrators in the traditional AIC model are replaced by analog filters with...

The electric information acquisition system is a powerful support for smart grid by collecting information from users, and the acquisition success rate is required more than 99%. However, the stable operation of the system depends on the equipment performance, technology selection, mechanism, maintenance...

High voltage 4H-SiC Ti schottky junction barrier schottky (JBS) diode with breakdown voltage of 1200 V and forward current of 40 A has been fabricated. A low reverse leakage current below 1.02 × 10-4 A or 4.08 × 10-4 A/cm2 at the 25 and the reverse bias voltage of 1200 V has been obtained. The forward...

A new 2000V-4A Junction Barrier controlled Schottky (JBS) diodes module has been fabricated using 4H-SiC. The module is composed of two SiC JBS diodes, and it is used for rectifying circuits. By adopting the proper SBD metal ,optimized structures and fabrication process, we succeeded in achieving good...

A new design method of flyback switching power supply is proposed for wide input voltage application. The new design method is called the boundary conduction mode (BCM) design.The finished flyback converter can operate in very wide input voltage from 80V to 500V reliably with the proposed method. The...

With the increase of demand for energy, energy recycling is becoming a hot spot in recent studies.The problem of motor feedback braking energy feedback system in energy fluctuation was proposed,the system is based on the combination of the super capacitor energy storage.the super capacitor can feed common...

The paper based on “limited rationality” and “replication dynamics” ideas of evolutionary game theory, assumes that military enterprise and civil enterprise prefer to adopt a fixed strategy, establishes an evolutionary game model of resource sharing to analyze the key factors affecting the relationship...

In recent years, the photovoltaic generation has become an important form of distributed generation. PV is greatly influenced by outside conditions such as light and temperature, and causes the stronger intermittent and randomness of the power output. As a result, storage devices are needed to improve...

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...

Adopting high performance buffer is the foundation of the landing gear on the helicopter. Based on established models on Adams/Aircraft, a novel type of series double cavity buffer on the landing gear is investigated by dynamic simulation. Corresponding simulation and analysis are achieved, which is...

Community of complex networks has attracted much attention. For the problem, we propose a local heuristic genetic algorithm (LHGA). Mutation of LHGA is combined with local heuristic function from the perspective of networks dynamics and makes convergence rate of this algorithm expressively improved....

With the increase of XLPE cable we used in power network, the corresponding technology of on-line monitoring becomes increasingly important. For improving the accuracy of on-line monitoring assessment of XLPE cable, we researched an assessment method and device of XLPE cable’s insulation state by Fuzzy...

In view of the problem of AC injecting into DC bus in the substation, the harm of AC injection is described, the characteristics of AC injection are analyzed, the detection technology of AC injection is researched, and the insulation monitoring devices for DC power system is designed. The kind of this...

In this passage, a new method is proposed to predict the load of electric vehicles (EVs) on highway. In this method, a simplified highway network containing charging stations is established, based on which we can generate an adjacency matrix. Then the origin and destination (OD) of vehicles are extracted...

In view of the influence of grounding capacitance to low frequency signal injection method, a new detection technology is proposed based on DC bus to grounding capacitance. This method does not affect the normal operation of DC power system. The insulation monitoring devices for DC power system is designed....

In this paper, we investigate the effect of modulation rate on the energy efficiency of a two-hop communication system with the assistance of a half-duplex decode-and-forward (DF) relay, considering the given bit error rate (BER) and using the M-QAM modulation. First, we formulate the optimum model of...

Although the current opisthenar vein image acquisition is less demanding, but practical applications often require special equipment, this paper describes a theme based on Microsoft Kinect sensors opisthenar vein acquisition. Using Microsoft's Kinect sensor to collect the opisthenar vein image, introducing...

In order to study the mechanical properties of steel tubular columns filled with steel-reinforced high-strength concrete (STSRHC) under eccentric compression , this paper establishes the formula of bearing capacity , analyzes the effect of eccentricity, slenderness ratio, strength of materials and other...

The mathematic relationship between the given orientations of two-prism groups and the corresponding pointing position of outgoing beam is the basic prerequisite needed in applications of achromatic risley prisms to steer beam in free space. Based on vectorial law of refraction, this paper finishes the...

This application research adopts the development kit named DE1-SoC, which can realize real-time collection about the voice signal of the motor rotation, and remove noises with anti aliasing filter. We research the corresponding spectrum in frequency domain after the combining STFT transformation. Using...

The secondary circuit in substations is in a strong electromagnetic environment, and intelligent devices may be affected by electromagnetic disturbance signals. Meanwhile, with the local installation of intelligent devices, the electromagnetic disturbance of its working environment may be further strengthened....

GIS technology was introduced in the information management system of urban forest, and Tangshan City urban forestry management information system is established. The system has the capabilities for data acquisition, storage, analysis and updating of different kinds of spatial information. There were...

On the basis of the dynamic equations of rotor system with pedestal looseness, rub impact and crack, the random response method of rotor system with pedestal looseness is researched. The method is based on stochastic perturbation theory and the Kronecker algebra, matrix calculus and random perturbation...

The grounding body in the power transmission line engineering is buried underground for long term, which will be eroded by soil environment. If it passes by the DC grounding pole, corrosion will be aggravated. Aiming at the 220kV line engineering in 500kV Dongpo substation and the 110kV line engineering...

In order to effectively extracting out weak ship shaft-rate electric field signal immersed in strong ocean background noise, a multi sub-band sliding detection algorithm capitalizing on Empirical Mode Decomposition (EMD) with Fourth-Order Mixed Cumulant (FOMC) Diagonal Slice is proposed. Firstly, EMD...

In recent years, our country has been a great leap forward development, the level of industrialization of our country's economic and social development is to continue to improve, and this and the electrical automation control system design and application is not open. The electrical automation control...

In the case of information technology, the application of computer in various industries is becoming more and more extensive, which provides many opportunities for the development of computer electronic control technology. At present, the computer electronic control technology need to involve the subject...

at present, the inheritance of the intangible cultural heritage of the martial arts has been in a fix, but the application of digital technology provides a new way for the development of the martial arts. The digital technology system of the intangible cultural heritage is a digital service platform...

The matlab programis usuarallyused to make simulation of electromagnetic distribution and the transmission of waves, which dynamiclyshows the propagation of waves. This article focuses on simulating the dynamic process of the propagation, reflection andrefraction of uniform plane wave in a different...

The coming of the Internet + Era provides new chances and opportunities for protecting and inheriting Central plain martial arts as an intangible cultural heritage. The Central plain martial arts established the database of the intangible cultural heritage of Central plain martial arts by combining with...

Based on the analysis of Hard- and Soft- Iron effects of magnetometer’s errors, a tilted ellipse model for two-dimensional plane was formulated. According to the analytic geometry theory, a magnetometer calibration algorithm was proposed to calibrate the tilted ellipse into a standard circle by translation,...

In the mobile field strength test including road testing and so on, because of the complexity of the city electromagnetic environment, the received field strength value is easy to be affected by Fading and therefore the result is not accurate. In this paper, A Preprocessing Method for field strength...

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...

This paper introduces the currently manufacture process of seamless pipe and the main factors that reduced seamless pip quality and quantity during production. Developing a machine that can automatically detect center point of raw ingot and punch oriented hole besides, it’s controlled by a remote control...

In order to improve straightening precision and efficiency, theory analysis and experiment is adopted to build straightening stroke prediction model. A theoretical prediction model is built and analyzed based on elastic-plastic theory. Then, a strain measuring scheme is proposed based on wireless sensing...

The combination of different rock properties will make different effects of the Deformation and Failure in Overlying strata, this paper uses the ADINA finite element software to establish two-dimensional model to simulate analysis the four kinds of different overburden structures displacement field variation...

A two dimensional finite element model is established to simulate the effect of pore water pressure on stability of surrounding rock of roadway of soft rocks and the distribution laws of water pressure during coal mining, according to the engineering geological data. Simulation results show that, the...

the determination methods of semi-hollow profiles were introduced.A new protective die structure was analyzed.and the selection of design parameters was introduced.the structure has a good effect on improving the strength and the life of the die and the quality of the products was showed that it is a...

Using the computational fluid dynamics, heat transfer theory and mechanics theory to analyze the internal heat source types and heat transfer path of high speed gear box, and establishing the steady-state heat transfer model. Based on the finite element theory, the finite element model of fluid solid...

This research designs an ultrasonic range finder where a MSP430F413 embedded system is used as a controller system. The research presents the instrument architecture with ultrasonic transmitted circuit, received circuit, embedded system. Also it study that the temperature and time interval error influences...

The clutch pressure plate was easy to produce high temperature and axial thermal deformation under the extreme operation conditions, which results in clutch ablation, torque transmission capacity /slip faults. In this paper, a new channel clutch pressure plate was proposed that set a radial cooling channels...

One leaning tower of 220 kV transmission line was taken as an example and a finite element model for the coupled tower-line system was established for investigating the effects of the uneven settlement on the transmission tower and line. The result shows that the bars of tower are compression-bending/tension-bending...

In view of the problem that the large-diameter pipeline gets out of the spreader in the hoisting process due to the insufficient spreader strength and rigidity caused by the large hoisting acceleration, a kind of special pipe spreader is designed; 3D software is used to establish the geometric model...

A conventional muffler of internal combustion engine is mostly constructed as a mixture or combination of perforated ducts, baffle or perforated baffle, expansion chamber, etc., and the noise reduction is limited and backpressure is high hence the fuel efficiency is low. In order to solve the problems...

The X80 pipeline steel for the west to east gas transmission project was successful produced, based on the hot strip mills equipment advantage. However, the impact toughness was unstable during the production. In this research, optical microscope, scanning electron microscopy (SEM) and energy dispersive...

Cellulose (CE), sawdust (SD) and wheat straw (WS) were subjected to triethoxysilane (AS) and methacriloxy propyl trimethoxy silane (MS), and maleic anhydride grafted polypropylene (MAPP) to improve interfacial bonding with matrix. Composites were prepared by these fibers as reinforcement. Tensile tests...

Surface treatment of three natural fibers including cellulose (CE), sawdust (SD) and wheat straw (WS) were carried out with triethoxysilane (AS), methacriloxy propyl trimethoxy silane (MS), and maleic anhydride grafted polypropylene (MAPP), respectively. Then the composites reinforced by these natural...

We propose a novel compact coupling for diesel generator sets, in which the coupling laminations and the generator fans share one bushing, thereby reducing the overall axial length of the generator set. The maximum stress and elastic deformation during operation were determined by finite element analysis...

Conducting polypyrrole (PPy) is an attractive class of electrode material to be used in supercapacitor. However, the main chain of PPy prone to rupture in the process of charging and discharging, which results in premature attenuation and decreasing of specific capacitance. The SDS-modified PPy is prepared...

Reconstructing surface from the large scattered data is a ubiquitous problem in reverse engineering. Implicit surfaces reconstruction methods using Multiquadric function have recently attracted attention for its high precision and continuous order. This paper get the relative efficient proportion of...

Elevated environmental awareness and an increasing concern with the global warming have stimulated the automotive, construction and packing industries to look for materials that can replace conventional synthetic fibers. Natural fiber appears as a good alternative since they are available in fibrous...

This paper expounds the selection of hardware, parameter Settings and software design in the PLC control system of the tobacco blending control system. It introduces the equipments composition, the control process, the method of flow control and the PID regulation of the tobacco blending technology during...

In order to make further explorations to the mechanism of underwater laser scribing, comparison of laser scribing in air and underwater under different power is conducted in this paper, at the same time simulation to melt splashing based on smooth particle dynamics is carried out. The results show that...

Traditionally, the pot used in cook-stoves have been constructed without paying much attention to their heat gains, while in the process of heat transfer with high temperature flue gas, it will lose a lot of heat. In sight of that, this paper introduces an improved pot with the incorporation of scientific...

Aimed to solve current collision problems between car head and truck rear, collision simulation of a novel type multistage rear protector is achieved, structure has been designed and optimized before. Based on conservation of energy theorem and regulations of dynamic collision test, dynamic explicit...

Dynamic explicit finite element analysis is practical and significant to study vehicle spiral rolling. By means of HyperMesh and LsDyna, numerical simulation is achieved with deformation, posture and acceleration obtained. During spiral rolling process, vehicle roof comes much close to occupant head...

Automotive industry chain service platform is to focus on a series of processes about the automobile industry's products, such as production, trading, evaluation, etc. Among this, the transaction mode and the suppliers evaluation system have high complexity. In view of the problems existing in the evaluation...

The ultimate strength of hull structure becomes more and more important in the whole life cycle. Many ways of assessment are developed in the design stage and the calculation accuracy can meet the need of safety. However, all methods of assessment are based on one-time collapse. This certain method is...

Tower crane operating environment uncertainties include lifting sway, wind load and air resistance and other factors. If we ignore these factors, it is difficult to accurately describe dynamic characteristics of the real system and difficult to realize automation of the tower cranes. This paper reveals...

According to the exist problem in process&manufacturing of large-diameter magnesium alloy tube workpieces, pre-deformation of as-cast alloy and extrusion from hollow billet were developed. The hot compression experiment results show that pre-deformation of as-cast alloy is of advantage to decrease flow...

Aiming at the problem that the installation of static strength test setup is not intuitive and it is difficult to check the existence of interference, this paper presents a method for automatic assembly of test loading equipment. The method is based on the CATIA two development technology CAA, the target...

With advantages of no mechanical contact, vacuum compatibility, oil-free, and high reliability, an eddy current damper (ECD) is designed for use in space. To obtain perfect damping characteristics, a conductor as an outer copper tube and two stationary plates, and an array of axially magnetized ring-shaped...

In the process of inflation and stabilization descent for the parachute, a coupling effect is generated between the the structure deformation and changes in the flow field around the canopy, which is significant important as well as the dynamic effect of the parachute. Besides, the peak value of the...

PC/ABS blend has widely used in vehicle industry. In this dissertation, fracture toughness of PC/ABS blend was studied. The specimens were prepared under various injections molding conditions, such as filling time, melting temperature and mold temperature. The fracture mechanisms were examined with a...

This paper develops a new type of pneumatic flexible joint, which is composed of flexible air bag, spring plate and restriction element, which is composed of two artificial muscles. It has a degree of freedom. In order to study the bending deformation and gripping ability of the joint, the experimental...

In this paper, numerical analysis of the high speed and small herringbone groove hydrodynamic lubricating bearing’s bearing capacity,rotational speed effected on the bearing’s eccentricity ratio and temperature rise, film thickness,oil film pressure distribution was solving by Reynolds equation under...

This paper studied on the fatigue experiment of two CRTSIII slab ballastless tracks on subgrade under high-speed train load, one was the track structure with self-compacting concrete thickness of 70 mm (the 70's), the other was 90 mm (the 90's). The two tracks were made of 1:1 full-scale test models...

Using the mean-field approximation, we employ the transverse Ising model with the next nearest-neighbor interactions to investigate the phase transitions in a ferroelectric thin film. The dependence of the Curie temperature on the transverse field, the surface exchange interaction and the thin film thickness...

Facing the impact of rapid urbanization and the problems of environmental deterioration, how to manage the development of landscape and green spaces in rural townships has become an important issue in China. However, how and to what extent can the patterns and changes of green spaces in the rural townships...

The microstructural evolutions and properties of the surface composite produced via the friction stir nitriding (FSN) method on Ti-6Al-4V alloy were investigated. Due to the optimized process parameters and suitable mixed gas proportion for a limited combustion reaction between Ti and N2, a composite...

The application of light emitting diodes (LEDs) for supplemental lighting is expected to increase quality of tomato seedlings in north greenhouse with less cost. Experiments were carried out to investigate the effect of supplemental lighting by LEDs with two different spectral qualities (blue, red and...

A series of high concentration of vanadium catalysts were prepared by the citric acid method and was evaluated for the selective catalytic reduction of NOx by ammonia (NH3-SCR) at middle-low temperature (180-280oC). Experimental results showed that V-W/SiTiOx exhibited the good activity on NH3-SCR reactions,...

The Internet is filled with opportunities for learning, communicating, and sharing information. It is a valuable resource for children and adults alike. Like any large community, however, the online world presents some underlying risks, especially for children. Parents need to be aware of some of the...