This paper addresses a modified method of extracting acoustic pulse based on the multi-band spectral subtraction and the frequency band variance. In this method, the acoustic pulse is detected, the noise spectrum is estimated and subtracted from the acoustic pulse spectrum. By abandoning the late reverberation...

The motion sensing interactive devices can greatly enhance the sense of immersion. In this paper, the flow of the interaction with the HTC Vive is sums up five step. Analyzes the positioning principle of the HTC Lighthouse and introduce the function of the HTC thumbstick. Then defines the quaternion,...

Based on low frequency load-shedding practice experiments of Xinyang power supply company, work principles as 'three reports, one examination and a table modification' is proposed to improve the management of power grid in substitute district. The methods introduced in the paper is proved to be effective...

This project is a residential area, the project is composed of two towers and commercial podium, is a collection of commercial, office in a body's comprehensive construction, where two towers total height 46.8m. The project according to a class of building lightning protection grounding design, roof...

The generation of solar power are known to be seriously influenced by many factors, such as temperature, humidity, et al. These factors cause the fluctuations of solar power system. This paper considers those fluctuations of different terms by using actual historical data and the different distribution...

The paper introduces a flow simulation based clustering algorithm for wireless sensor network. The algorithm is fully decentralized. The proposed algorithm is inspired by simulating flow in the network. The algorithm clusters the nodes that are at distance of at most k hops from the cluster head while...

The digital channel receiver must have the ability of processing large number of data,A improved digital channel arithmetic is proposed, This algorithm put digital down conversion before decimation and filtering operation .Moreover the algorithm is realized by using FPGA parallel process. The key design...

Satellite systems progressively operate in higher frequencies, such as the Ka bands. The signals in Ka band system are seriously affected by the environment constraint. A significant percentage of the VENESAT-1 (Venezuelan Satellite) footprint has the coverage service area over the Amazonian. Due to...

The Amazon has the world's largest tropical forest and about the half of all freshwater in the world. The construction of the wire guided communications systems is denied byinternational environment regulation because the Amazon is a worldwide protected area.Satellite communications systems represents...

The laser-induced damage threshold (LIDT) of KDP crystal affect directly the increase of laser power. In order to research the influence of metal impurities in the subsurface of KDP crystal on LIDT, analyzed the impurities composition and relative content of two kinds of KDP crystal samples by fluorescence...

Compressed sensing is a new data compression method which can recover a sparse or compressible signal from a small number of linear and non-adaptive measurements. To solve the problems of high sampling rate and massive data storage faced by traditional collection and compression methods of power quality,...

Neutral point voltage balancing is an inherent problem of three-level rectifier. This paper first analyzed the cause to the neutral point voltage deviation of the DC-side three-level rectifier, and studied the charge and discharge transient processes of the two DC-side capacitors and the harmonic characteristics...

2 m InGaAsSb/AlGaAsSb quantum well laser with AlGaAsSb as barrier layer and InGaAsSb as potential well layer. The composition and strain of the material have an important influence on the energy level position and band structure of the quantum well, which affects the performance of the laser. In this...

For the operating characteristics of limited capacity micro-grid, power quality disturbance impacting on the micro-grid is to be significantly larger than the civilian power grid, especially the transient power quality disturbances can not be ignored. By combining the advantage of wavelet transform and...

In this paper, a Space Keying Shift(SSK) system based on a Single Photon Avalanche Diode (SPAD) receiver is presented. SSK modulation has the advantage of faster transmission rate than OOK modulation, and the implementation complexity is not high, it will become a widely used modulation method in single...

Using first-principles computations, the structural, electronic properties of P - and P -Si3N4 in the pressure ranges of 40-50 GPa were investigated systematically, and the band structures and density of states have been analyzed in detail. the results show both P - and P -Si3N4 are insulators, and there...

Every time a car's brake is applied a lot of energy is wasted. Physics tells teaches that energy cannot be destroyed. So when the car slows down, the kinetic energy that was propelling it forward has to go somewhere. Most of it simply dissipates as heat and becomes useless. That energy, which could have...

In order to solve the problem of wide-range and high-precision angle measurement, a kind of grating-angle measurement system was designed. The grating sensor was used as output part of angle measurement signal, and the grating signal hardware decoding programme was designed applying CPLD, which achieved...

We propose a method based on MUSIC and Chaotic Monkey algorithm for measuring direction and positioning with the sparse linear array sensor on the discharge source. First, we de-noise and focus on the linear array signals. Then, we get the angle of the incoming signal by MUSIC algorithm. Finally, we...

The analysis of electromagnetic scattering characteristics of the static target after years of development has formed a mature and complete system, the electromagnetic scattering characteristics of target motion analysis in the last few years has become a hot and difficult problem for researchers and...

This paper mainly analyses on the influence of Congyi grid voltage caused by small hydropower station. The mechanism of high voltage has been expounded. Based on the ETAP simulation, comprehensive comparison of various measures of operational and governance effect has been carried out , the optimization...

In the process of supervision and inspection of Jiangxi power grid, there are some phenomena in 35kV Xin'an substation, such as abnormal sound from transformer and capacitor, and overheating in capacitor. The bus and capacitor power quality test found serious harmonic exceeding. Two methods of harmonic...

Aimed at the character of the numerous instruments and the high price in large-scale aircraft cabin, a half-entity emulation method of using virtual instrument with actual panel is presented. According to the basic active status and performance parameter of certain engine, a multinomial fitting method...

A low complexity carrier phase estimation (CPE) algorithm for 16-QAM systems is investigated in this paper. In the proposed CPE algorithm, the QPSK partitioning scheme is adopted to divide the symbols into three classes (C1, C2 and C3). The symbols in C1 and C3 are used to achieve the coarse estimation...

In order to improve the reliability of redundant CAN bus communication network, in this paper, a dual CAN bus redundancy communication system based on DSP is designed. In the hardware, a dual CAN redundant interface circuit based on TMS320F2808 chip is designed; in the software, a dual CAN bus communication...

The oxygen vacancies of Y3Fe5O12(YIG) influence on the magnetic proximity effect (MPE) in Au/YIG heterostructures has been studied by first principles calculations based on the density functional theory (DFT). The results show that one oxygen vacancies can reduce the two neighbor Fe3+ to Fe2+ and MPE...

This paper designed the signal acquisition system of surface EMG signal. The hardware part chooses the biological signal acquisition device Thought of Technology company. At the same time, in order to further analysis and the requirement of real-time system, PC communication software based on Matlab....

.In this paper, according to large quantity of historical statistics, we have established a model which could successfully forecast the power charge in two regions. Because of the different efforts between weekdays, weekends and holidays, we made a piecewise function[1] to decrease the error. The method...

The dynamic behaviors of 2 vortex in nanodot driven by microwave magnetic elds is investigated by micromagnetic simulations. The spin dynamics are analyzed by extracting the magnetic excitation spectrum from Fourier transform. Four resonance peaks are observed. Domain-wall resonance mode has been identified...

This thesis firstly analyzes some indexes as daily maximum load, daily minimum load, daily difference between peak and valley and daily load rate in two different regions. And then it makes a stepwise regression analysis on the relationship between the above indexes and various climate factors, so as...

Porous Fe micro-flakes with uniform size and well-defined shape have been successfully synthesized by hydrogen thermal reduction of the -Fe2O3 precursor flakes. The thicknesses and planar sizes of those porous flakes fall into the range of 208-375nm and 10-23 m, respectively. Static magnetic properties...

The optimization scheduling method for islanded micro-grid operation is studied in this paper. The typical structure of islanded micro-gird and function of each component are introduced. Based on the analysis of operational characteristics of PV, wind turbine generation and energy storage system, the...

In order to amplify the output signal of an infrared detector, this paper analyzes the principle of infrared detector and noise characteristics of the amplifier circuit, and based on JFET devices and operational amplifiers a low frequency low noise amplifier is designed. The simulation shows that the...

Concentrated solar power is one of the most promising technique for significantly reducing the consumption of fossil fuels. In this paper, a quasi-two-dimensional tracking solar concentrator- module heliostat (M-H) collector and its tracking mechanism are discussed. Comparing to the traditional two-dimensional...

In this paper, we propose a novel inertial-assisted slam system intended for low-cost micro aerial vehicles (MAVs). The system sensor assembly consists of color camera, depth camera and a inertial measurement unit (IMU) with three-axis accelerometers/gyroscopes. We use IMU data to enable probability-based...

Rotor UAV is a small, lightweight and low-cost unmanned vehicles. In recent years ,it has been widely used in production and daily life. With the rotor unmanned aerial vehicles more and more appear in people's work and life, UAV flight safety issues have become a concern. Many researches on controllability...

This paper presents a centralized anti-islanding method on large-scale PV power plants. Contrast to traditional perturbation technology based on single photovoltaic inverter, this method employs a centralized protection device to inject current disturbance onto the photovoltaic power plants, and the...

A method based on the empirical mode decomposition (EMD) threshold de-noising algorithm is proposed since eddy current array signal is mixed with more high frequency noise. This algorithm consists of four steps: (i) The signal is decomposed into IMFs by EMD, (ii) the signal is recombined based on energy...

RFID (Radio frequency identification) is an emerging technology that can usher enormous opportunities in agricultural product industry. This paper presents a review of applications of RFID in traceability, cold chain monitoring, livestock management, supply chain management. It also discusses the basics...

Aiming at the problem that the traditional soybean koji-making in the production process automation level is not high, the product quality and poor stability. This paper presents a new is proposed to realize the intelligent monitoring system of soybean koji-making based on embedded WEB. This project...

In this paper, we introduced the theory of static electricity protection for heating and pasting equipment. Conductors were electrically conductive objects, in which there were free to move the charge; we studied the metal conductor, which was characterized by the existence of lots of free movement of...

To detect anomaly sensing data, in some existing methods, a sensor node first checks its sensing data. Only the node finds its data may be anomalous, it turns to other nodes for further detection. This reduces the energy consume, but it introduces the risk of cheat. Since sensor nodes are often physically...

Taking into account the development trend of distributed photovoltaic power generation, there will be a high permeability of PV in the future distribution network, and the traditional three stage current protection will be no longer applicable because of the malfunction or rejection. In order to maximize...

Diode is the foundation of semiconductor devices.This paper analysis the electrical conductivity of microstructure of solar panels in the Power supply system of gelatinization equipment. We discussed the formation process of PN junction, theoretical analysis of electrical conductivity.In this paper we...

Food material heating equipment need to resist temperature interference amplifier circuit. Although the collector current has increased when the ambient temperature rises, but the partial amplifier circuit to make adjustments quickly to suppress the increase in the trend, making the collector current...

Gelatinization equipment need to resist temperature interference amplifier circuit. When the ambient temperature increases, although the collector current increases, but the partial bias amplifier circuit to make adjustments quickly to suppress the increase in the trend, making the collector current...

This paper introduces the design of 13.56MHZ long distance RFID reader based on ISO14443A protocol. The hardware block diagram and the software flow chart of the reader are given. According to the experiment simulation, the sending signal and the receiving signal waveform are shown. The processor uses...

The effect of pulse wave shape on Taylor cone jetting behavior in electrohydrodynamics micro jet process has been investigated by using the ethyl alcohol solution. The square wave, trapezoid wave and triangular wave with different amplitude have been used in the experiment. The sequential images gathered...

This paper is pointed at the optimization of flush atmospheric data system sensors placement, and developed the optimization methodology based on the non-dominated sorting genetic algorithm II (NSGA-II). First, the physical model of sensor system is analysed, then, designs the objective function and...

It is extremely important to evaluate the efficiency of equipment. There are some papers studying the method of evaluating efficiency, while they don't consider environmental impact. In this article a method for evaluating efficiency of electronic equipment with environmental impact is put forward, based...

Performance of feature extraction and representation, sticking point of image recognition task, will directly influence the accuracy of final recognition. The traditional feature extraction algorithm of vein recognition is based on the sufficient prior knowledge of analysis on vein information characteristics,...

This paper citation network analysis scientific knowledge mapping tool, which called CiteSpace information visualization software rendering, obtained China's development of intelligent agriculture, hot topics and research trends in recent years, at the same time design a system based on Intelligent fertilization...

The absorption coefficient, refractive index and optical fingerprint characteristics were acquired by terahertz time-domain spectroscopy in the range of 0.4~1.5THz of the capsule drug ofloxacin. The results show that ofloxacin had multiple absorption peaks with different intensities within the frequency...

The research and development of the electric energy efficiency management experiment system aims at elevating the related technology and management level of energy efficiency in Hubei Electric Power Company by means of constructing the electric energy efficiency management experiment system. In this...

The main objective of DTN routing is to transfer the message to the largest extent. In another words, the delivery ratio is the most important evaluation index of DTN routing. The priority of data package in DTN network is the degree of importance of the data package and data packages with different...

The application prospect of underwater imaging detection is wide in the fields of military operations, marine development and engineering applications. Considering the complex marine environment, the energy transfer process of underwater imaging sensor is analyzed on the basis of optical seawater transmission...

There are several error estimates to atmospheric light in the algorithm of image defog based on dark channel prior which the operation efficiency is low. In this paper we propose an improved method to solve these problems. Comparing with the original defogging image, the computing time of our algorithm...

With the electric energy consumption monitoring equipment is the foundation to carry out energy-saving work, strengthening the monitoring of energy consumption especially power consumption monitoring work in China to improve energy efficiency, realize the sustainable development of the energy, construction...

Appliance specific energy monitoring is perceived as a prerequisite for reducing energy usage in households.In this paper, a non intrusive monitoring method is introduced, and a power identification algorithm based on transient detection is introduced. Then the simulation experiment is carried out by...

This paper describes the design of the architecture and circuit block of the RX receiver's equalizer, which is used to reduce the inter-symbol-interference(ISI) in high-speed transmission backplane, and a 3,75Gbps configurable Continuous Time Linear Equalizer (CTLE) and 3-tap configurable Decision Feedback...

Plating factors of graphic design of copper patterns and plasma pretreatment of dry film were investigated to find their effects on bottom-up plating quality of copper pillars. The thickness of copper pillars is examined using scanning electron microscope. John's Macintosh Product software is used to...

Compared with the ordinary books scanner's complexity and huge size, the design of a USB-based scanner module was much acceptable.In the module, the OV7670 was used for image acquisition, and two AVAGO optical sensors were used to acquire the position coordinates of the area which would be scanned. A...