According to the landmark feature, the paper guides UAV precise landing with machine vision technology. Firstly, the author analyzes the principle of visual navigation based on the landmarks. According to the imaging principle of machine vision, the paper uses projection matrix method to solute the conversion...

Wireless power system via magnetic resonance coupling has been widely used in numerous fields, thus, this technology has been studied by many researchers for different problems, and influence factors on system power and efficiency are proposed in some papers. By applying lumped parameter circuit theory,...

The effect of potassium hypermanganate (KMnO4) as an oxidant on pickling behavior in HCl-based electrolyte and the surface quality of original hot-rolled and blasted 430 stainless steel (430-SS) plate are studied using weight-loss tests, microstructure analyses (scanning electron microscope and laser...

Developed an acoustic imaging system applied in acoustic test. The acoustic array is made up of 260 MEMS microphones and control by a FPGA, which also in charge of transferring data by optical fiber. The mainframe is control by a FPGA. A DSP is in charge of processing the data from acoustic array. Two...

In view of non-standard question of the current construction project managers' "moral" qualities structure this article investigated, studied and analyzed domestic and foreign structure of construction project managers' "moral" qualities. referring to the domestic and foreign existing qualities structure...

To achieve a fluid energy recovery by piezoelectric generator, a piezoelectric wind energy harvester (PWEH) is presented and investigated experimentally. Making use of the force generated by the flow of wind to vibrate the piezoelectric material, the mechanical energy harvested from the vibration of...

Fault feature extraction is a challenge for fault diagnosis of rotating machinery. The vibration signals measured from rotating machinery are usually non-stationary and nonlinear. Especially, the useful fault characteristics are too weak to be identified at the early stage. In order to solve the problem,...

The stability of soft soil roadbed is a key factor for the properties and quality in motion of highway or railway. The process of stable soft soil roadbed has protracted nature. The stable of soft soil roadbed depend on the internal structure, composition, volume and external environment. Based on a...

The Blinking jamming is the intentional and deliberate transmission or retransmission of amplitude, frequency, phase, or otherwise modulated intermittent or pulse signals for the purpose of misleading in the interpretation or use of information by electronic systems. In this paper, it is shown how blinking...

In this paper, researchers propose a method to build a natural human-robot interaction system based on Kinect sensor. Taking the advantage of skeleton tracking technology, researchers can easily get the depth data from Kinect sensor and capture body movements, which greatly simplify the recognition algorithms....

Cutting force measurement is an essential requirement in the machining process. Hence, various methods of measuring the cutting force have been proposed by many researchers. In this study, a new type of tool holder with force sensing element is designed to measure the three-dimensional cutting force...

With the continuous development of the social economy, the demand of the whole society is bigger and bigger. To improve the level of electricity service and meet user demand for electricity, power grid companies must work to change the structure of power grid development, establish and develop smart...

Nowadays the society is the age of information, the computer technology and network technology have been widely used in all walks of life, which effectively improve the competitive power of enterprises and promote the healthy development of the society. With the rapid development of economy, it also...

Combining with the structure characteristics of sonar cavity and the theory of the self-noise prediction, the wall of sonar platform affected by the mechanical vibration is simulated by elastic thin plate and the rectangular cavity is the simulation of sonar cavity, the theoretical analysis model of...

In order to investigate the oxidation characteris-tics of residual coal of goaf under different oxygen concentration environment, the discarded coal is collected from the actual workplace to analyze the particle size distribution, then five coal samples are prepared by the same granularity ratio. The...

This paper establishes the system of differential equations model of Electronic Power Steering (EPS), which is based on the characteristics of EPS system, and then establishes the simulation model of simulink. According to the state space model of the system that have obtained, researchers get controllability...

The nonlinear flow characteristics induced by the geometrical features in various flow areas are often ignored. The strictly dynamical symmetry assumption is not sufficient to design the hydraulic control system by adopting the proportional valve, and the research about the proportional valve model can...

As one of the key equipment of mining, rotary drills have a high incidence of failure. In the actual application, it is hard to fault diagnosis for roller transfer. In order to solve this problem, design a roller transfer control of fault self-diagnosis system with the fuzzy clustering analysis method...

The online condition monitoring system diagnoses power equipment health status. And now it is one of the major issues to improve the reliability of the power system by preventing a potential failure in advance. Since there are too many different condition monitoring techniques are used, they need to...

In order to control the fault state of the distribution network, a power distribution network fault risk early warning system is developed. This system divides the distribution network fault into three levels failures, equipment level failure, feeder level failure, and system level failure. By calculating...

To analyze and evaluate the distribution network failure interruption, this paper establishes the comprehensive evaluation index power distribution network failure interruption. By using the normal cloud model, this paper also realizes the risk evaluation of power distribution network fault. First, fault...

After power distribution feeder fault, it is required to identify fault section, isolate the fault quickly, and then to restore the power supply of the non fault section. To solve the problem of power supply recovery of multi linked lines, the design of the software of distribution network fault recovery...

The calculation of the building differential pressure (DP) setpoint based on the water flow-rate is discussed in this paper. How to find the coefficient (k) of water piping system in any case is the key in the calculation. The condition of the building DP calculation is documented to make sure its correction....

The laboratory buildings are not main part of industrial buildings in the developing countries like China. However, the energy intensity of those buildings is on the top of industrial buildings because of requirement of temperature and relative humidity control. As an example in this paper, the recommissioning...

The DC motor of Control system is a control algorithm for most PID. In this paper, a kind of intelligent ultra short feedback endocrine controller is designed, which is based on the mechanism of hormone secretion regulation, and is applied to the control of DC motor. The endocrine controller includes...

Influences of different coiling processes on microstructure transformation and mechanical properties and microstructure of ultra-high strength steels (UHSS) were investigated. Microstructure and distribution characteristics were obtained. Samples were proceeded by a controlled rolling (CR) followed by...

In order to solve the contradiction between finite laboratory resource and ever-increasing students, a networking laboratory system based on serial communication server is designed and implemented. The campus network user can monitor the actual laboratory system through the serial relocation software...

This paper builds a novel coupled model which includes the electric circuit and the magnetic circuit of the three-phase five-legged transformer under direct current (DC) bias. In the magnetic circuit model, the eddy-currents, the iron core topology and the saturation characteristics of the core material...

A novel transmission-line model (TLM) of the three phase transformers under direct current (DC) bias is built. In the model, the differential terms in the transformers circuit model are discretized. The saturation characteristic and the hysteresis effect of the core material are described on the basis...

Electrical control system plays a decisive role in the running performance for a permanent magnet biased magnetic bearing. Power amplifier, as a part of the electronic control system, its performance directly affects the suspension system. Therefore, the amplifier design is an important part of the system....

The finite element method and analytical method are combined to optimize the ratio between rotor slot width and rotor tooth pitch, in order to reduce the cogging torque in line-start permanent magnet synchronous motors. Based on energy theory equation and Fourier transform, the simulation analysis results...

The inhibition of noise and vibration on switched reluctance motor (SRM) was studied in this paper to improve the speed regulation system. Nonlinear dynamic simulation model based on the SRM is studied based on torque estimation method of torque ripple. Time-varying and nonlinear characteristics of SR...

To use high-quality drilling fluid to inhibit underground shale collapse, researchers must first evaluate many types of drilling fluid suppression performance. The method of evaluating the performance of the drilling fluid can be recovered by the rolling recovery test, the expansion of the drilling fluid,...

There will be a variety of factors restricting the development of the condensate gas reservoirs in the process of mining depletion. There are many important implications for the actual production to study the results of these factors of recovery ratio. Taking advantage of the high temperature high pressure...

This paper presents a wide-area coordinated control strategy for voltage stability, which is based on multi-agent systems and wide area measurement system. The strategy combines the effectiveness of the Multi-layer secondary voltage control and the real time of wide area measurement system. It improves...

An approach based on data mining and relationships exploration is presented for estimating the static voltage stability relative margin of power systems. The data set is created based on simulations by the software PSS/E. The input variables selected for estimation are corresponding to the relationships...

The displacement and deformation of soil mass is the important index in civil engineering. In this paper, white light digital image analysis in frequency domain is introduced to measure the continuous displacement of soil mass. This method has the characteristics of whole-field, non-contact measurement...

The Internet of things is an important part of the next generation information technology. Also it is a vital development stage of the “informationization” era. The internet of things can connect the traditional urban gas industry to the network information platform. By changing the mode of production,...

In order to decrease the influence of failure occurred in the distribution network, and improve the reliability, this paper proposes a design of the distribution network firewall protection terminal. Statements are described in detail, including the overall architecture of the system, the communication...

Most thrust bearing group’s lubrication ways of screw drill are the drilling fluid lubrication. Abrasive wear and drilling fluid corrosion could happen easily on thrust bearing group in this lubrication way. Aiming at this problem, through analyzing the structure of traditional transmission shaft assembly...

This paper presents a LabVIEW-based control system for magnetic resonance sounding (MRS) instrument applied to groundwater detection. The system is designed with a top-down approach. The paper detects groundwater up to 150m depth by using this system to control MRS instrument to transmit large alternating...

The building industry output value accounts for 7% of the GDP in Guangdong province, but the problem of imbalanced development exists; the competitiveness in the 21 prefectures is uneven. Based on the statistical data of each city in Guangdong province from the year of 2005 to 2013, applying DEA model,...

This article carries out a new method to find out and compensate the roll eccentricity online in the strip cold rolling process. Firstly, the roll eccentricity signals are found out from the massive process data by a soft measurement method, secondly, this signals in time domain is converted into signal...

Shift schedule is an important parameter for automatic transmission vehicle calibrations, which directly affects the vehicle's power and fuel economy. This paper tries to establish a system to optimize shift performance based on the styled driver model. First researchers proposed to imitate the real-world...

With the rapid growth of private car ownership in the city, parking is difficult in the residential area and chaotic parking problems have become increasingly prominent. In view of the phenomenon this paper makes electronic toll collection technology as the core design of a set of residential parking...

On the basis of establishing control system model of voice coil linear motor, saturated link and dead zone link of nonlinear systems are made Simulink simulation to implement the optimization of control system. B&R Automation Studio integrated development environment is used to automatically generate...

With the rapid development of modern industry, the video detection technology is used more and more widely. In the video detection technology, the video image superposition technique occupies the most important position. This paper proposes a system based on video image overlay of TMS320DM6446, and makes...

In this paper, the influence of slope on the spreading characteristics of fire smoke in the semi-transverse ventilated tunnels was studied by using the FDS simulation. Through simulation experiments, the reasonable smoke exhaust strategies for preventing fire smoke from spreading in the sloping tunnel...

Based on the acoustic field distribution and directivity characteristics when leakage happens in the boiler furnace, the propagation model has been firstly analyzed theoretically and simulated numerically in this paper. Then a shell model has been established to make the sound field simulation and line...

The type of neutral point grounding is a key technology and hot point for marine high voltage power system. In order to study the special type of neutral point grounding for marine high voltage power systems, the feature of various types of neutral point grounding for general marine power systems was...

In this paper, an athlete physical distribution trainer is designed to help athletes train allocation of physical in runway class sports rationally. In order to improve athletic performance, based on the analysis of overall structure and controlling system of the physical distribution trainer, this paper...

Based on the law of athlete physical distribution in this paper, an athlete physical distribution trainer is designed and studied. It can help athletes in track class sports rational allocation of physical training to improve sports performance. This article describes the working principle of physical...

The project transaction modes have a profound impact on the project schedule, quality and investment objectives. In this paper, the design flow of the project transaction mode is presented according to the general principles of engineering design. Besides, the key issues involved in the design process...

By using the fixed point theorems and the decomposition and synthesis technique, the existence results for impulsive neutral functional differential equations with delay argument are established. An example to illustrate the main results is given.

With the continuous development of the social economy, the energy demands of the whole society become larger and larger. Energy shortage and environmental pollution have attracted widespread attention. Under the circumstance of higher energy consumption and the heavy pollution of the traditional electrical...

In order to enhance the plug and play function of new energy power generation in DC microgrid, to increase the utilization of renewable energy and to improve the performance of DC bus voltage, a hierarchical control strategy of DC microgrid is proposed. This hierarchical control strategy is composed...

This paper illustrates a low energy consumption and high accuracy WSN (wireless sensor network) that provides an intelligent gas inspecting system in coal mines, which offsets the shortage of mine cable monitoring system. The substation of coal mine gas inspecting system was designed by CC2530 SOC that...

Smart home gateway is the key to external access networks and smart home network connection device, and it can accept signals from different external networks, transmitting signals to an smart home device via home network to control and manage a home network internal device, introduces the technical...

This paper designs a security system for warehouse’s security. Based on linux and S3C2440, this system’s peripheral devices include temperature sensors, humidity sensors, cameras, web clients, Android clients, fans, and led. It uses the temperature sensor to monitor the temperature and fire, uses camera...

Actual dynamic lift is an important index to measure the load capacity of agricultural unmanned aerial vehicle (AUAV). In real operation, it is difficult to obtain the accurate value of dynamic lift, which is easily affected by environmental factors, such as wind and other disturbances. In this paper,...

Intuitively display system operation parameters are the basis of the implementation for belt conveyor speed regulation and energy-saving control. This paper presents a speed regulation remote monitoring system of belt conveyors based on PLC and king view technology to meet the requirements of visibility,...

In order to track nominal output power of photovoltaic (PV) battery effectively and consider the feature of non-linear output, researchers present a Radial Basis Function and Back Propagation (RBF-BP) combination neural network based on genetic algorithm (GA) optimization to use in PV maximum-power-point-tracking...

The long term field scale experiment was performed for six years since 2008 in West-Liaoning Province, P. R. China. Furrows were made in autumn using deep-plough, straws were put into opened furrows using straw returning machine, and then the furrows were buried by soil back-filling plough and forming...

To solve the increasingly serious resource and environmental problemsA, explored the method of the green design and manufacturing for the architectural engineering machinery.Researchers Researchers have made a lot of progresses in the following areas: Selection of green materials and some green manufacturing...

An integrated machine with automatic sprinkling and feeding functions for Nereis farming was presented in this paper. Different from traditional manual feeding method, the machine is assembled on a vehicle chassis which is driven by engine and electricity. A cam mechanism is fixed on the back axle of...

Garlic is a popular crop planted widely around the world, but garlic planting is a heavy work. This paper proposed an automatic machine which can achieve the automation of garlic planting. Based on the study of the main structure of the machine, the connection and transmission relationship of the machine...

This paper described the compound injection (PFDI) technology that combines the port fuel injection (PFI) and gasoline direct injection (GDI) system, and optimized the injection parameters by experiments to meet different requirements for mixture concentration at different conditions to improve power...

With the State Grid Corporation of China pays more attention to distribution network, its investments are unceasingly enhanced. A plenty of distribution network construction projects are carried out gradually. At present, the evaluation of distribution network projects effect is to mainly rely on manual...

Failure of “display number of remaining bombs does not match the actual number of remaining bombs” occurs in powered inspection and shoot of aircraft cannon control system, the principle of aircraft can­non control system is introduced, the reasons of failure of “display number of remaining bombs does...

Failure of cannon shot stopped occurs after the first firing when aircraft cannon air-to-ground attac­king. The working principle of cannon is analyzed, and the reason is found out with reproducing the failure. The correctness of solutions is validated through the ground target experimentation.

This paper introduces in detail steps as how to analyze and eliminate the abnormal dangerous failure: fuel injection of a certain aircraft’ fuel supercharging system by safe and quick means when out-field experimental equipment is limited so as to break a new path to eliminate faults of the out field.

In order to enhance the timeliness and accuracy of the soft measurement method of the ESC for electric-wheel vehicle, an improved soft measurement algorithm was designed. The improved algorithm was built based on an improved UKF. The improved UKF sampling strategy used scaled minimal skew sampling method...

Mountain red earth is a kind of relic ancient clay remained on the Yunnan Plateau formed under the influence of paleo climate, but this soil has experienced degradation recently. To understand the mechanism and effects of such degradation, this study examined the mountain red earth based on the analysis...

The distributed hydrological model of rainfall-runoff for the two small scale basins of the different topographic conditions were developed for the main objective to provide method reference for the further studies on distributed hydrological model of the small-scale basin. The Liudaogou Basin located...

Aiming at the analog circuit performance online evaluation demand of the largest interval principle and underlying geometric structure, two online methods of dimension reduction are proposed for analog circuit performance evaluation from the angle of feature extraction, First, a supervised method of...

Aimed at the armored vehicle weapon system cables’ characteristics and the requirements of their parameter-testing, a kind of tester which realizes the automatic detection of the cables is designed. The tester is based on the principle of voltage comparion, which is controlled by an embedded controller...

This paper introduces a low dropout regulator (LDO) by bipolar process. This LDO is composed of a starting circuit, a bandgap reference, an amplifier and power transistors. The bandgap produced a reference voltage about -1.25V, this voltage will be amplified to -5V by the error amplifier, power transistors...

Soil heavy metal pollution has become a focus of attention in the world. The poplar trees have some characteristics: easiness to plant, quick growth, strong resistance, and large biomass. Therefore, the poplar is taken as the example and this paper studies the enrichment characteristics of different...

Jinsha River Dry-hot valley is the typical region of soil degradation in southwest of China. In order to understand the mechanism and the effect of the soil degradation, sampled the dry red soil from the Jinsha River Dry-hot valley, researches and analysis were made in the surface 0~20cm soil aggregates...

A mathematical formula matching algorithm is proposed. Firstly, this paper creates the tree presentation of the mathematical formula by its MathML presentation markup, normalizes the tree structure by rule base, and then horizontally traverses the tree to normalize the variable names to get the structure...

Naproxen is one of common non-steroidal anti-inflammatory drugs (NSAIDs). Its pharmacological properties vary with different configurations. In order to improve the drug efficacy, it is significant to prepare high enantiopure drugs. In this study, carica papaya lipase (CPL) and papain extracted from...

This paper designed a high-temperature and high-pressure environment simulation device, and simulated the temperature and pressure environment for downhole instrument performance testing and calibration on the ground. The device can meet the low energy consumption, small control precision, easy removal...

The top-down construction method has complex construction organization and many courses. Whether on theory or practice, quite a lot of problems need to be solved. In this paper, researchers used the finite element program Midas GTS to simulate THE foundation pit excavation of subway station in Hefei...

Based on the features of the high technology enterprises in Leshan and DEA, this paper is to probe into the performance evaluation criteria for the high-technology industrial clusters, so that it will provide some useful advice for the development of the high technology enterprise clusters in Leshan.

Based on the Shapely Value, this paper analyzed the profit allocation among the cooperative enterprises in a supply chain, and tried to optimize it to apply specifically to an agricultural supply chain of Sichuan.

Currently, multiple modulation schemes based on QPSK are applied more and more widely. They are involved in digital microwave communication system, digital satellite communication system, broadband access, mobile communication and cable television system. QPSK is quarternary phase-shift keying. It characterizes...

Effects of using different year of humic acid on millet growth and water and fertilizer use efficiency was studied in a field experiment in a semi-arid and arid region in 2011-2014. Four-year results showed that after using humic acid, the soil moisture content was increased by 0.20%-40.41% over that...

The application of masonry buildings with frame and seismic-wall in the lower stories in the “5.12” Wenchuan earthquake disaster area was very extensive. The main damage characteristic of this kind of structure was summarized through field investigation where a large number of examples appeared. Overall,...

The code coverage analysis of large-scale software is a project that needs management skills to accomplish. The paper does research on how to apply Project Management Body of Knowledge (PMBOK) to the code coverage analysis based on its techniques and process. The initiating process group focuses on three...

With the three generations of development; Avionics systems has tended to miniaturization; integration; and intelligence development. IMA is integrated and distributed that use electronic systems for commercial aviation COTS software (DRE). IMA is integrated and complex logic structure that requires...