Abstract:When projectile launched by ground operations for weather modification did not burst in the air and land, it would damage to the ground personnel or important facilities. In order to avoid the damage, using remote sensing image, global positioning system and geographic information technology, this paper designed and developed an analysis system for safe firing area of antiaircraft guns and rocket. The system extracts the object information from the highresolution remote sensing image of Spot in the system database and the GPS positioning information of the operation terminal system. Combined with the trajectory parameters of different types of rocket and antiaircraft guns, this article analyzed the safe firing area. The results of firing area analysis are intuitive, reliable, convenient and quick operation, providing a scientific basis for safety of ground operations for weather modification.

Abstract:In order to realize the test of multi channel DVI video signal based on high speed avionics bus, the design scheme of airborne multichannel DVI video signal distributor is proposed. According to the characteristics of electric bus multichannel DVI video signal rate high speed, realtime and multiway, complete video signal conversion module, signal shunt module circuit design, realize data acquisition processing and shunt gigabit network video signal transmitting function. The experimental results show that the airborne high speed bus Video Splitter without affecting the original video link condition, solve the highspeed shunt avionics bus multichannel DVI video signal drawing requirements.

Abstract:In order to further study reference and application value of the intelligent car in our daily life,TI′s MSP430G2553 single chip microcomputer minimum system is taken as the intelligent trolley′s control and detection core in this design. A design scheme of the intelligent trolley based on lowpower singlechip microcomputer is presented.To realize tracking,obstacle avoidance,voice recognition,night illumination and buzzer alarming, microcomputer constantly monitors status of the voice recognition module, infrared reflection module, motor drive module, buzzer alarm module and night detection by control program. After testing system, the car runs flexibly and smoothly, of which the hardware part works stably and possesses high reliability.

Abstract:With regard to the electronic scale′s problems such as the material of the electronic scale cantilever beam, weighing method and unitary function, this article proposes a design of the steel cantilever beam type electronic scale which uses MCU as a controller, electric resistance strain gauge pasted on the steel cantilever beam as weighing sensors, combines matrix keyboard circuit, LCD display circuit, A/D conversion circuit and voice broadcast circuit, etc. Such electronic scale has the function of measuring the weight between 5.00 g to 500 g. When the weight is below 50 g, the weighting error will be less than 0.5 g; when the weight is above 50 g, the weighting error will be less than 1 g; Such electronic scale has the function of unit price setting, amount accumulating according to the weight; the machine also has the net weight function (i.e. deducting the packing′s weight) and the voice broadcast function. The whole system adopts the storage battery as its storage battery which improves the portability and the reusability of the system. The experiment verifies that this system has the advantages of high measure precision, clear display, stable performance, etc., could be used in diversified situations. This design, therefore, has a certain guiding significance to the improvement of the cantilever beam type electronic scale.

Abstract:It was proposed to design an impedance analyzer based on the virtual instrument technique and an impedance analyzer was developed utilizing the automatic balance bridge impedance measurement method. A signal generating card and data acquisition card were selected to provide the exciting voltage signal and acquire the two voltage signals simultaneously with a high sampling rate, respectively. A measuring and controlling software was developed with LabVIEW to control the instruments, measure the impedance and analyze the data. It has been demonstrated through the tests that: the measurement error of impedance is below 5% with the frequency ranging from 20 Hz to 500 kHz and the impedance ranging from 1 Ω to 500 kΩ; the frequency scanning points, displaying and saving of the measurement results can be configured flexibly and conveniently through the software. The impedance analyzer developed based on the virtual instrument technique can be used in more general applications and has a wider measurement range. It can be operated more conveniently and the function can be extended and reconfigured more easily. Furthermore, the performance can be upgraded or degraded through an appropriate selection of the signal generating and data acquisition cards and parameters of the measurement circuit according to the real requirements. The development cost is controllable and the required time is short. Therefore, the design approach for an impedance analyzer is well applicable to the development of instruments in the scientific research and teaching laboratories.

Abstract:Voltage sag has become an increasingly prominent issue in power quality. In this paper, a new voltage sag detection method based on Hilbert transform and morphological filter is proposed to solve the problem of low accuracy and poor realtime performance in voltage sag detection. The basic principle of Hilbert transform for voltage sag detection is discussed. The concept of mathematical morphology is introduced, and the morphological filter is constructed based on it. The selection of filter parameters is given. The performance of this method in voltage sag caused by singlephasetoground fault is analyzed and compared with singlephase dq transformation method. Simulation results show that the method can detect the sag amplitude and phase more quickly and accurately.

Abstract:This design is based on S7200 series PLC and white high power LED lamp. According to the characteristics of the tunnel, the intelligent lighting control system is designed. The video vehicle detector for detecting vehicle speed and vehicle, brightness detector is mainly used to detect the light intensity, according to the PLC video vehicle detector and brightness detector signal acquisition, after calculation, to the tunnel lamp group (LED lamp group) output brightness command for stepless regulation. The communication mode between PLC and PC is Ethernet. The experimental results show that this design can greatly save tunnel friction power. In theory, the design can be applied to all kinds of light source and the length of the tunnel.

Abstract:The base station for indoor coverage on common processing platform (mini CRAN) is a LTE base station of miniaturization,lowpower,high capacity based on general processor. Because of the time synchronizationthat TDLTE system need，so this paper presents a IEEE1588 time synchronization programme in mini CRAN.In Base band Unit pool the masterslave synchronization model is used to achieve time synchronization and transmit 1588 time synchronization packets to the subordinate,the transmission time delay of 1588 packets in switch can be calculated with transparent clock model.By using the 1588 time analyzer test the time delay，the time delay can be in positive and negative 200 ns，and it reachs the TDLTE base station system requirements.

Abstract:Reef radar is an important part of the construction of maritime defense，but reef area is small, the environment is bad,away from the mainland, The author analyzes the reef radar design and in the process of using such as workers tension, protection and guarantee problem, Summed up the reef radar design must strengthen comprehensive protection, automation, intelligent, modular design, on this basis, from the target admission automation intelligent design, modular design, fault detection fast repair design, the integrated protection design aspects discussed reef radar design , improve the radar environment adaptability, easing the burden on the operation and the security personnel, to ensure the operational give full play to the performance of radar.

Abstract:As for the problems like single control mode and unavailable longrange wireless control, a wireless greenhouse control system based on STM32F103RBT6 MCU and Internet of Things is designed. The system collects temperature, humidity, CO2 concentration and other information through the NRF905 wireless transmission module to the STM32 master control system. After the system temperature, humidity, CO2 concentration exceeds the limit, the system sends the information to the user remotely through the GSM module. At the same time, the relay module is controlled to regulate the environment of the greenhouse through the Bluetooth wireless transmission. Through the field test, the system can control the greenhouse equipment according to the onthespot environmental information, which fully proves the reliability and the feasibility of the system.

Abstract:Because of the test data is not unified, the test efficiency of the ATE is low and the cost is wasted. In order to overcome this problem, we analyzed the processing methods of each STDF file module and designed a conversion program using LabWindows/CVI software environment for Specification of STDF files, which is the test data standard format for ATE. By this algorithm, the bidirectional conversion between binary file STDF and text file is completed. By comparing the generated text and standard ATD text, the correctness of the program transformation is verified. In the end, the conversion program is embedded in the domestic BC3192V50 ATE, it realized the uniform of the test data. The result of the test shows that this algorithm can efficiently achieve bidirectional conversion, the structure of the test data is regulated and the analysis ability of the test data is improved.

Abstract:In the data transmission process of the spcaceborne radar, it is inevitable to be influenced by various interferences and get bit errors because of its working environment and highspeed transmission characteristics. In order to reinforce the highspeed signal and protect the process of transmission from disturbing, one of the perfect codes called golay code is taken and it can crrect include 3 error bits. Extended golay code can be created when a parity check bit is added at the end of golay code, by the way, its encode and decode curcuits were designed. Accoeding to the extended golay code generate matrix and parity matrix, as well as a hard decision decoding algorithm, the curcuits were implemented based on FPGA by verilog hardware description language, including parallel encoder/decoder and serial encoder/decoder. Finally, the behavior simulations showed that the extended golay code’s encoder could influently encod, at the same time the decoder could correct any combination within 3 bit errors when simulate the spaceborne radar was interfered and get error bits, it surely achieved the expected goal to reinforce the data transmission process.

Abstract:This paper mainly designs a bidirectional LLC resonant converter with symmetrical structure about the analysis of theory and optimization design of parameters to reduce the loss of power switching. Firstly, the operating principle of the converter is analyzed by the approach of fundamental component method(FHA) to obtain the DC voltage gain versus. The paper also analyses the impaction of load and parasitic parameters on ZVS and ZCS of power switches. A reasonable quality factor and resonant parameters are designed to ensure that the converter will not enter the capacitive working area. Finally, the simulation model of bidirectional LLC resonant converter is built in the saber simulation software, and the feasibility and accuracy of the parameter optimization design are verified by the simulation results and theoretical analysis.

Abstract:The numerical simulation of the flow and heat transfer in a portable thermostatic bath with spiral baffles to rotational viscometer calibration under different flow and structure parameters is developed. The temperature response characteristics of fluid in the rotational viscometer are investigated. SIMPLE algorithm is used to solve the pressurevelocity coupled governing equations employing QUICKtype scheme for variables discretization. Realizable kEpsilon Model is adopted for modelling turbulence. The numerical results show that when the number of spiral baffles in the water jacket increases, compared with the heating condition, Thermal stratification phenomena of fluid within the cup in cooling condition is enhanced, which is not conducive to meet the temperature uniformity requirements for viscosity liquid which to be measured. When the temperature difference between heating and cooling condition is same, for Installed different spiral baffles structure heating temperature response is basically the same as 0.24 ℃/min. Cooling temperature response decrease with the increasing number of spiral baffles, and the maximum difference is 0.036 ℃/min. With a fixed flow rate, temperature response of thermostatic bath increases with the increase of heat flux density. While just change flow rate, the temperature response of thermostatic bath with different structure is not obvious.

Abstract:In view of the demand of high quality life and the application of the existing desk lamp can’t meet the requirements of intelligent home, the design and production of a realtime operating system based on the STM32 multifunction intelligent desk lamp. This design is based on STMicroelectronics CotexM3 core microcontroller STM32 as the main controller, the hardware circuit and write the corresponding software program to achieve intelligent lamp light regulation, Bluetooth short distance communication, humancomputer interaction, measuring room temperature display function, realtime control sensor, makes the lamp control more convenient, more intelligent. The experiments show that the design of the intelligent desk lamp using STM32 to the table lamp system for multi task management, enhance the stability of the system, improve the system′s realtime performance.

Abstract:In order to make a reasonable verification on the condition of small samples of airborne fire control radar detection range index, and save the cost of test, based on the analysis of the commonly used evaluation method of radar detection range is insufficient, according to characteristics of radar detection distance test, put forward using t distribution theory in mathematical statistics, according to the radar detection range was estimated t distribution method, radar detection distance distribution with t distribution center, while the test sample is predicted. The radar detection distance of small sample t distribution test method, which can reduce flight test vehicles, test results are credible. Practice has proved that the method has obvious advantages and application prospects.

Abstract:An indoor lowvoltage powerline carrier communication transmission model is proposed, which is suitable for multi branch topology, multi load impedance in the frequency band of 1~300 MHz. The transfer function is derived from the parameters of the wire material itself and its environment. The model is based on the transmission efficiency of each connection section, than the total transmission efficiency of the system is obtained. According to the measured amplitudefrequency characteristics, the theoretical model is modified to make it possible to simulate the transmission characteristics of different model topologies. The proposed model is helpful in frequency bands preselection for actual power line systems.

Abstract:Aiming at the inherent disadvantages of traditional cascade speed regulation system such as serious harmonic pollution and low power factor, a voltage cascade speed regulation system based on PWM inverter was designed.The mathematical model of PWM inverter in dq coordinates was derived in detail. In order to eliminate the coupling and nonlinear, the exact linearization decoupling additional variable structure control strategy was adopted, and the construction of control law was deduced. And the speed current double closed loop PI control was used by the IGBT chopper circuit to get the control chart of the system. Finally the effectiveness of control strategy was simulated by MATLAB. The results proved that the control strategy not only could achieve smooth and stepless speed regulation, but also could achieve the purpose of improving power factor, eliminating harmonic and saving energy.

Abstract:The dead reckoning was originally used for ship positioning in sailing,the cost of the used accelerometer, magnetic compass and gyroscope is high and those size is big.With the development of MEMS technology,the size,weight and cost of accelerometer,digital compass and gyroscope are greatly reduced.So it can be applied in pedestrian navigation.According to the principle of the dead reckoning, GPS/INS tightly integrated navigation system INS 1200 can be ued to conduct navigation experiment, collect realtime data.Experimental data is solved according to the dead reckoning and coordinate transformation algorithm.The positioning maps after coordinate transformation are simulated by MATLAB.The simulation result shows that the dead reckoning owns higher navigation accuracy in short time.There is greater significance for navigation in short time.

Abstract:Inferring the gene regulatory network (GRN) structure from data is an important problem in computational biology. However, it is a computationally complex problem and approximate methods such as heuristic search techniques, restriction of the maximumnumberofparents (maxP) for a gene, or an optimal search under special conditions are required. The limitations of a heuristic search are well known but literature on the detailed analysis of the widely used maxP technique is lacking. The optimal search methods require large computational time. We report the theoretical analysis and experimental results of the strengths and limitations of the maxP technique. Further, using an optimal search method, we combine the strengths of the maxP technique and the known GRN topology to propose a novel algorithm. This algorithm is implemented in a Bayesian network framework and tested on biological, realistic, and in silico networks of different sizes and topologies. It can overcome the limitations of the maxP technique and show superior computational speed when compared to the current optimal search algorithms.

Abstract:In this study, a improved controller, aiming at “swing of plugin and takeaway of capacitor” and “operating frequently” of the traditional ninezone control method and combining the fuzzy control theory, based on fuzzy control is designed which fits for lowvoltage reactive power compensation of factories. This fuzzy controller adopts twoinput and singleoutput structure, with voltage deviation and reactive power deviation as the control variables. The reactive power compensation is the controlled variable, and the triangular membership function is selected. In order to verify the feasibility of this fuzzy controller, a reactive power compensation model based on this controller is established. The simulation results show that the proposed fuzzy controller is feasible, which solves the problem of switching vibration, improves the accuracy of the system and improves the quality of the power grid.

Abstract:In the study of geomagnetic field, firstly, the distribution model of geomagnetic field and its secular variation should be established. While the international geomagnetic reference field (IGRF) is used to describe the global geomagnetic field and its secular variation of the geomagnetic field model standard, the international association of geomagnetism and aeronomy (IAGA) every five years is given a set of spherical harmonic coefficients and the international geomagnetic reference field (IGRF). The distribution of the earth′s basic magnetic field and its secular variation is indicated by the spherical harmonic analysis method, which is usually called the spherical harmonic mode of the geomagnetic field. In this paper, through the preparation of the program to complete the calculation of the geomagnetic field, and then use the calculation of the geomagnetic data, draw the geomagnetic elements contour map. Therefore, this program can be calculated at any point of the geomagnetic elements of the value and draw its contour map.

Abstract:The selection of test points is the basic problem of analog circuit fault diagnosis.How to find the least number of test points to isolate all the fault circuit has become the focus of the study.Commonly used test point selection methods are mostly fault dictionary method.The study found that if a particular fault in the circuit can only be isolated by a special test point，then taking this special test point out can greatly simplify the fault dictionary, by finishing the selection of the remaining valid test points and the removal of redundant test points, the best set of test points can be chosen. This method is called special test point isolation algorithm. Through compared experiment, it is found that the proposed algorithm balances the requirements of time and accuracy in test point selection. What is more, it has a higher efficiency.

Abstract:In order to solve the current local blur degree, resulting in poor effect of image restoration, this paper recovered from image feature point detection and filtering angle, proposed image restoration algorithm SIFT feature point detection and based on Wiener filter. First of all, according to the characteristics of the scale space extrema, key point positioning and direction of distribution, the design of feature descriptor, fuzzy image feature point distribution, to establish the coordinates of the center of the purpose of disc restoration model. Then, based on the characteristics of the point spread disk function, coupled with Fourier transform and least squares filtering, an unconstrained Wiener filter operator is designed to achieve the purpose of image restoration. Finally, according to the characteristics of the corner location to guide the restoration of the filter disk function to calculate the starting position, based on software engineering to achieve the restoration algorithm. The experimental results show that compared with the current restoration algorithm, the restoration technique has higher accuracy and stability.

Abstract:An image inpainting metod combining with Hough transform was proposed to inpainting the inevitable scanline dropping in satellite cloud image, which was based on median filtering. This method on the basis of scanline dropping positioning, was only collected neighboring pixels in vertical direction, and adjusted the window size according to the number of abnormal points. The total variation, the adaptive sliding average, and the adaptive median filtering which combined with Hough transform, have been compared from the high realtime requirement, subjective vision and evaluation parameters aspects. The simulation results show that this improved median filter based on scanline dropping distribution characteristics is more suitable as a satellite cloud image inpainting method.

Abstract:Because of the insulator string creepage distance calculation needs to along one axis section, in this paper, a method of extract axle wire of insulator strings based on the cross ratio invariance is proposed. Firstly, the point cloud data are obtained by Kinect, then on the basis of the Mahalanobis distance discriminant method to eliminate the center data and retainthe umbrella skirt data; Secondly, according to the crossratio invariancebetween the umbrella skirtof insulator strings, the direction vector of axle wire is limited to estimate; Finally, we fitting the centers of the umbrella skirt in crossratio invariance, and the global optimal equation of the central axis of insulator string is obtained. The experimental results show that, our method can extract a the global optimal, accurate and efficient central axis, and it will provide effective support for subsequent creepage distance measurement.

Abstract:Wheel is an important part of the vehicle, the wheel tread profile of the online realtime detection is of great significance. To realize the noncontact online measurement, automatic detection scheme based on image processing can measure wheel tread profile and geometric parameters timely and accurately. The laser irradiate the wheel, there is a band on the tread of the wheel. It is the wheel tread profile. Through analyzing the image taken by CCD, it can achieve the line and curve information in the tread profile with image processing and Hough transform. Some steps are proposed to improve the method, including image proprocessing、edge detection and clustering storage algorithm. To analyzing the method, taking experiments compare with traditional method. The result proves the method in this paper can detect the wheel tread profile and geometric parameter accurately and effectively.

Abstract:To get the size of small work pieces by noncontact means, a new method is proposed in this paper which is based on the invariance of cross ratio with noncalibrated CCD cameras. After the images of work pieces being remotely acquired by camera and preprocessed, edges as well as some other features of the work piece will be detected and extracted. According to two orthogonal sets of parallel line markers with known spacing on the measuring table, the size of the work piece is obtained. Experimental results indicate that this kind of method used in length measurement system has similar precision to the traditional techniques which first of all must have their cameras calibrated. At the same time it can be simply operated and adapted to various situations. The measured length of work pieces ranges from 0mm to 500 mm and the measuring error is less than 0.4%.

Abstract:In order to solve the problem of low efficiency by manual way of identification, this paper uses HALCON software as a platform to identify the invoice number. Firstly, the image preprocessing is carried out, which includes transforming the original image into single channel image, image enhancement, Gaussian filtering, threshold segmentation and connected region segmentation; Secondly, the mathematical morphology of the pretreated image is processed, And then ,the figures of the split; Finally, the number of the invoice number is identified by MLP (multilayer perceptual classifier). By comparing with the manual method, the results show that the invoice number can be quickly and accurately identified by the method based on HALCON, which can effectively reduce the workload of the staff and improve the efficiency of the work.

Abstract:Insulator location is a premise condition of noncontact creepage distance measurement. Dependent on the morphology and distribution characteristics of the insulator, we proposed a method of insulator localization based on Hough transformation and RANSAC algorithm. Firstly, we obtained the edge of the insulator image with Canny edge detection, and dependent on the characteristics of the insulator is shaped like a circle, we combined Houghcircle transformation to test. Secondly, according to the characteristics of the insulator spacing roughly equal and the insulator string like a straight line, we fitted the center points of the circles with the modified RANSAC algorithm. Finally, we traversed the straight line and located insulator with a red rectangular box. The experimental results have shown that this method can locate the insulator effectively, which provides the basis for the subsequent research of the insulator detection and so on.

Abstract:In recent years, GPS technology and embedded technology have a good application in navigation, positioning, measurement and other fields. In order to research and analyze the performance of three kinds of common positioning algorithms (least square method, weighted least square method and kalman filter), for different receivers and considering the performance, cost, operation efficiency, stability, and other aspects of the problems, this paper designs a GPS positioning system based highperformance ARM. The experiment uses two different kinds of receivers(NEOM8T,LEA6T). The practical operation results show that the three filtering algorithms can improve the positioning accuracy of GPS, but it has different degrees of optimization performance on the receiver with different performance. This study provides an effective reference value for selection of location algorithm in engineering implementation, at the same time, GPS positioning system with highperformance provides a good base of hardware and software for differential positioning technology, carrier phase measurement, integrated navigation and other cuttingedge technology research, and has important significance in the field of satellite navigation and positioning.

Abstract:With the development of the military avionics system, airborne data bus transfer rate is higher and higher, the standard GJB289A bus (1 mbps) have been unable to meet the demand of the development of high throughput airborne data bus, so the highspeed GJB289A bus technology is one of the current development trend of airborne data bus.In order to study of highspeed GJB289A bus technology, in particular the need to build a simulation system.This paper introduces how to build a highspeed GJB289A bus simulation system, topological structure, working principle, supporting software, further expounds the importance of highspeed GJB289A bus simulation system, for the subsequent research and engineering application of highspeed GJB289A bus to provide technical basis.

Abstract:Master slave synchronization has been widely studying because of its fast convergence speed and high synchronization precision as a synchronization methods of Ad Hoc networks based on TDMA. In order to improve the convergence speed and synchronization precision of masterslave synchronization, solve some problems in existing masterslave synchronization protocol, this paper proposes a new synchronization method for ad hoc networks using the life cycle of network nodes. This paper discuss the implementation of the synchronization method in detail with the time frame design and the time slot access, then the convergence time and synchronization accuracy of the network nodes in different access scenarios are tested by OPNET simulation software. The simulation results show that when the number of access conflicting nodes reaches a maximum, the longest synchronization time in different network state does not exceed 1s, and the synchronization error between the source node and the 6 jumps node is only 0.37 ms.The fast convergence and accuracy of the synchronization method are verified.

Abstract:In the integrated modular avionics (IMA), strict space and time partitioning management ensures that different applications running on the same module can share processing resources. According to the requirements of system hardware resources and applications, the multitype constraints of partition are defined, which makes the partitioning and timedivision access scheduling become complex combinatorial optimization problems. By combining the preprocessing of partition allocation with satisfiability modulo theories (SMT) to solve the scheduling table, it is possible to reduce the number of variables at the time of assertion and partition scheduling, and improve the efficiency of the solution. The preprocessing process uses the maximum clique problems algorithm, and then transfer the rest of the district constraints into the logical expression that SMT can identify, using the formal solution to get the time of each partition scheduling. The feasibility of this method is verified by different numerical examples, and the advantage of the preprocessing process for quickly judging the satisfaction requirement and shortening the solution time is illustrated.

Abstract:The demand for accurate speed measurement increases with the rapid development of electronic science and technology in recent years. As the key component of speed measurement radar, the hardware circuits in realtime speed measurement radars have essential impact on the accuracy and realtime performance of the measurement results. Thus it is important to design high performance hardware circuits for speed measurement radars. This paper presents a hardware design for the speed measurement radars to improve the accuracy and realtime performance of radar systems. The hardware platform is based on fieldprogrammable gate array (FPGA) thus the digital signal processing technique can be exploited to process the radar signals and control the radar system. The experimental results show that the proposed radar system maintains high performance for both low and high frequency signals。Thus the proposed system is applicable in real applications。

Abstract:Radial artery pulse wave contains a very rich cardiovascular system of physiological and pathological information, it is cardiovascular disease prevention, diagnosis and treatment of great significance. The current detection of cardiovascular equipment is divided into two categories: one for the detection of a comprehensive machine, but the volume is too large, the price is high; and the other although small size, low price, but the detection function of a single, both larger application limitations. Therefore, this paper uses the ARM + DSP microprocessor as the core, through the piezoelectric film sensor realtime collection of pulse waveform, through the signal conditioning circuit to deal with noise, baseline drift and power frequency interference on the pulse wave, according to pulse wave characteristics and blood pressure information Ten cardiovascular parameters were calculated, the system integration uC/OSIII microoperating system and STemWin graphical interface to achieve display and interactive features, and finally to achieve miniaturization of equipment, detection of diversification, low price and easy operation of the market demand. Experimental results show that the system hardware and software design is reasonable, can be effective and accurate detection of cardiovascular parameters of users.

Abstract:An Acousticmagnetic EAS system based on ARM CortexM3 is designed owing to bad antijamming ability, detection sensitivity, low detection range and high rate of false positives faults in common EAS system.This paper introduces the working principle and hardware structure diagram of acousticmagnetic EAS system, analyses the acousticmagnetic tags signal in time domain and frequency domain characteristics, proposes FFT spectrum analysis, signal crosscorrelation, calculate the least squares fitting line slope variance calculation, calculation of signal peak value and peak varieties of acousticmagnetic tags signal algorithm, and describes the system software design of the algorithm in detail.The practice test proves that the system has strong antijamming performance, high detection sensitivity, wide detection range, low rate of false positives, etc.

Abstract:To overcome the difficulty of choosing the dynamic model and giving the strength of noise that applying the Kalman filter will face, this paper presents an algorithm of noise adaptive Kalman filtering for video point target tracking, based on the characteristic of video point targets. To better fit the dynamics of a video point target, the twostage dynamic model, which can changes its form with regard to the value of correlation time constant, has been chosen as the state transition model for Kalman filtering. Moreover, the process noise is estimated according to the dynamic model and the observation data. Meanwhile, the observation noise is estimated according to the grey value distribution in each image. Then the process noise and the observation noise are adaptive. According to the outfield experimental result, the methods we proposed could effectively ensure the tracking accuracy.

Abstract:The InGaAs/InP avalanche photodiode (InGaAs/InP APD) has been one of the core devices for singlephoton detection at the nearinfrared wavelengths. The localization of the singlephoton detection has become a trend. The 1.25 GHz sine wave as the gating pulse was applied to the InGaAs/InP APD in Geiger model. Due to the capacitive response of the APD itself, The generated avalanche signal triggered by the singlephoton was buried in the spike noise. By using the lowpass filter method, we can extract the effective avalanche signal from the peak noise. In order to explore the performances of the domestic InGaAs/InP APD, we measured the related parameters of the domestic at different temperatures and different detection efficiencies, such as dark count rates, afterpulse probability, timing jitter,and we compared the parameters with the imported APDs’. When the domestic InGaAs/InP APD worked in -25 ℃ and the detection efficiency at 10%, the dark count can be as low as 9.9×10-7 /gate, the afterpulse is only 1.5%.From this, we could conclude that the research of the domestic InGaAs/InP APD is close to the foreign level, but there is still room for the improvement.

Abstract:Shaft rate magnetic field signals produced by the unmanned helicopters in maneuver flight is an important physical fields, which is difficult to be stealth. Unmanned helicopters can be detected and identified by analyzing the shaft rate magnetic signal, and the status of the unmanned helicopters can be monitored. In this paper, the magnetic field sensors are used to detect the shaft rate magnetic field signals of the unmanned helicopters. Short time Fourier transform for timefrequency analysis is applied to deal with the measured data. The testing results show that the specific shaft rate magnetic field signals of 5~40 Hz which are related to unmanned helicopter’s status are generated in unmanned helicopters maneuver flight. According to the characteristics of the signal, detection and identification of unmanned helicopters are realized. The detection method has a good effect in the real data application.

Abstract:A wireless multichannel nerve electrical stimulation system is designed，the hardware contains wireless communication part, nerve stimulator, the control software includes software based on labVIEW. Wireless communication module contains communication module based on Bluetooth and 2.4 G remote control transceiver, to facilitate debugging and actual remote control. Nerve stimulator unit contains the common lithium battery 3.7 V boosting transformer circuit, STM32 minimum system, bipolar voltage controlled constant current source circuit, 4channel analog switch. In order to realize the multipoint simultaneous control, the stimulator has four separate output channels and arbitrarily two of the four channels can realize concurrent output. Each channel has configurable waveform parameters such as pulse frequency, pulse rate, intensity. The result of the experiment shows that under load lower than 10 kΩ, this wireless multichannel nerve stimulation system can realize realtime multichannel remote control of about 500 meters.

Abstract:Aiming at the problem of signal distortion and late maintenance of wired transmission in remote monitoring of dykes, some problems such as difficulty in developing wireless communication technology and high cost. By using sensor multinode measurement combined with RS485 wired transmission, 2.4 G wireless networking and GPRS network. A lowcost, lowpower, easytodevelop data remote radio transmission scheme is put forward,the system can realize highprecision , largescale and allweather dam slope automatic monitoring. After testing, the system has high accuracy, strong antiinterference, remaining in the same state angle sensor to measure, and the relative error is less than 0.2%. It also has a good linearity between -30° and +30°. The temperature sensor can meet the accuracy of ±5 ℃,and the humidity sensor can meet the precision of +3%.During the testing process, the wireless network is stable and the remote data transmission is reliable, and the monitoring interface is intuitive and clear.The system has practical value in dam slope stability and slope protection detection.

Abstract:Photovoltaic power generation technology has become increasingly mature, and photovoltaic power generation has been greatly promoted, so that new energy can be more fully utilized. In view of the problem that the photovoltaic battery can not be effectively monitored in the process of power generation, this paper designed a set of photovoltaic power generation monitoring system based on the PC monitoring software built by VS2012 and the Internet of things technology. In this paper, for each part of the system design are introduced, including the brief introduction of the controller and inverter, PC software design, the detailed introduction of system communication, has carried on the system diagram drawing system，and has drawed the system block diagram of the system. Experimental results and field applications show that the system can effectively monitor the photovoltaic power generation, and make an early warning in time.

Abstract:For most RF microwave systems, microwave power is an essential evaluation index. For small and medium microwave power source systems, in order to meet the testability of the system, it is necessary to increase the quantitative detection of the output power. In this paper, a simple, practical and economical design method of microwave power detection module is introduced in detail. The method realized the detection of the high precision peak power, pulse repetition frequency and pules width by linear detection，sample hold，data sampling and software calibration methods. The test data are compared with the actual measurement of power meter and oscilloscope, and the measurement precision of the module developed by this method is verified.