Abstract：The software and hardware requirements are relatively fixed in the standard system of the smart energy meter. The energy meter are integrally designed, once the hardware or software failure, can only take the form of the replacement of the whole device. In this paper, based on the IR46 standard, the author puts forward the technical scheme of the dual MCU smart energy meter, which is separated from the measuring MCU and the management MCU. This paper focuses on the main functions of the two MCUs, technical indicators and the corresponding key technologies of the two MCUs. The research results of this paper will have a good reference value for the development of the smart meter and its MCUs of the next generation.

Abstract：Java card is a smart card running a small Java based operating system that can dynamically be upgraded. This article introduce developers to the security issues of the Java card virtual machine that should be taken into account when implementing a Java card platform. This article studies vulnerabilities of the Java card virtual machine and tries to identify its shortcomings. Further studies illustrate the impact of various threats. Finally some defensive technology are presented to counteract the threats. The test results can tell the defensive technology is valid for the security of the Java card platform.

Abstract：Aiming at the problem of high power consumption caused by broad operating frequency band and high date rate of broadband power line communication(PLC) chip and based on the introduction of broadband PLC communication unit and chip，low power design techniques are analyzed in detail from various aspects of operating frequency band, physical layer, MAC layer and chip level around the influencing factor of chip power dissipation. Currently the broadband PLC chip and module have been developed successfully, and test results show the power consumption can fully meet the requirement of broadband PLC communication unit in electric energy data acquisition system for state grid.

Abstract：With its coverage widely and access easily characteristic, PLC technology has been popularized in meters reading and home automation domains，but the channel of PLC is not perfect, there are critical power noise and all kinds interference existed. Long time practice proved that the best way to overcome the problem of PLC channel is channel coding. In HomeplugAV standard give out a double binary Turbo coding structures, but for commercial reason, this Turbo interleave structure has become the patent product of oversea telecommunication equipment manufacturer, if use this Turbo directly, maybe cause intellectual property disputes in future. In this paper, we give out a different Turbo interleave patterns ,which performance is better than HomeplugAV with the same complexity level, then give out the simulation results.

Abstract：A high voltage generator circuit with low voltage is presented in this paper. Using voltage doubler circuit to get a higher voltage, charge pump circuit generates a 15 V high voltage for electrically erasable programmable read-only memory(EEPROM) normal operation in 1.3 V low voltage. A negative temperature divided voltage circuit was designed to realize a 15 V high voltage with complementary to absolute temperature(CTAT). EEPROM′s reliability was improved when the temperature changes from -40 ℃ to 85 ℃. The high voltage generator circuit has been implemented in 0.13 μm Embedded CMOS technology when the supply voltage varies from 1.3 V to 1.75 V. Its area is 600 μm×80 μm.

Abstract：In recent years, there is an increasing need to control rotary motion，as a result photoelectric encoder is widely used. It also puts forward higher requirements for the precision and resolution of photoelectric encoder. It is pointed out that the development of photoelectric signal compensation technology provides an important guarantee for improving the accuracy of photoelectric encoder. The principle of photoelectric encoder and four indicators to measure the quality of photoelectric signal is introduced. Starting from the four indicators, the domestic and international current research status of adaptive compensation technology for encoder signal is summarized. Finally, the advantages and limitations of the existing compensation methods are analyzed, the development trend of photoelectric encoder signal compensation method is prospected.

Abstract：A design method of dual-core security chip was introduced, and with the implemented dual-core security chip used in POS equipment as an example, the principle and function realization was elaborated. At present, the pure basic security chip is a single core implementation scheme, mainly through monitoring whether encounter attack to clear the confidential data. Based on this, a special dual-core technology is designed, making the confidential data run in closed environment which is completely isolated from the practical application, putting an end to the possibility that the confidential data may be induced to be stolen through the application terminal.

Abstract：Frequency synthesizers are indispensable parts of a RF(Radio Frequency) system. This paper makes a study of how to design a frequency synthesizer by using a digital PLL(Phase-locked Loops) ADF4351 and a Spartan-6 FPGA(Field Programmable Gate Array). This paper mainly discusses the principles of ADF4351, the SPI(Serial Peripheral Interface) communication between the two parts, and the design of the PCB(Printed Circuit Board)，and also give key HDL(Hardware Description Language) codes and the result of its performance. The characteristics of this frequency synthesizer is low-cost, resource-saving, and easy to construct or upgrade. It has the best performance between 100 MHz and 700 MHz with SFDR(Spurious-free Dynamic Range) of around 40 dB.

Abstract：In order to solve the problem that the coarse-grained cryptographic logic array control overhead is large and the control efficiency is low, this paper propose an array of four layer control model based on the study of the three layer control model of some main array processing architectures, and achieve efficient control of the AES, A5-1 and other symmetric algorithms on the scale of 4×4 programmable control network. The synthesis result of DC shows that the total area is 13 712 μm2 under the 65 nm CMOS process, which is equivalent to the number of 0.95 million NAND gates, accounting for 0.37% of the array area. The highest frequency of AES and A5-1 control flow reaches 1 389 MHz and 1 190 MHz, respectively, which can meet the application requirements of small area and fast speed. Comparing the four layer control model and the three layer control model in six performances, the overall performance of the former is much better than the latter, and it can meet the requirements of efficient control of any network interconnection structure array.

Abstract：For adaptive MIMO-OFDM wireless baseband transmission system, this paper proposed a parallel multiplexing FPGA realization method of radix 4 FFT/IFFT algorithm, and made the research and simulation of FPGA implementation for adaptive digital modulation, STBC coding and FFT/IFFT module. The simulation results show that the design realized the function of the modules, and good performance, has certain application value.

Abstract：A second order ΔΣ Time-to-Digital Converter(TDC) is proposed to achieve high resolution and wide signal bandwidth. The proposed TDC based on gated-ring oscillator(GRO)-based TDC achieves second order quantization noise shaping with a time accumulator using time difference adders. Implemented in SMIC 28 nm CMOS process. Spectre simulation results show the noise floor of the TDC within 1 M bandwidth is about -82 dBps2/Hz which corresponds to a 50 Ms/s Nyquist-rate TDC and with 2 ps steps. The TDC power consumption depends on the time difference between input edges, typically about 1.19 mW for 1 ns interval measurement. Limited by the structure, the input range of this type of TDC is small.

Abstract：In order to realize the low cost, miniaturization and large capacity design requirements of chipless RFID tag, this paper presents a design of chipless radio frequency identification(RFID) dual polarized label which is compact and can be printed completely based on conductor natural resonance. Using the polarization characteristics of the resonator, the number of bits of data stored in the fixed UWB band is doubled by polarization multiplexing under two kinds of plane wave excitation of vertical polarization and horizontal polarization. The 18 bit encoding capacity can be achieved within 22.69×22.69 mm2 size. Through the simulation, the radar cross section(RCS) curve of the tag is obtained, and the feasibility of the tag structure is verified.

Abstract：A displacement transducer system using magnetostrictive technology with Profibus-DP communication protocol supported is designed. This system is based on the architecture of ARM+FPGA. The FPGA is used to generate the excitation pulse signal, capture the echo, control the interfaces and so on. The ARM is selected as the master chip of the system to realize the functions such as calculating the displacement, compensating the nonlinearity of the displacement and temperature drifting, controlling the communication etc. The testing results show that the designed system fulfils Profibus-DP protocol and the designed displacement transducer has the resolution of 10 μm, and the measuring precision is within ±0.1 mm. Also the temperature drifting is controlled with in a predetermined range. The whole system works stably under field environment and has a good performance of anti-interference.

Abstract：In order to solve the information security issues in current industrial control system(ICS), this paper presents a trusted architecture for ICS. Firstly, this paper analyzes the traits of ICS, system module, and control sequences. Then using the concept of trusted computing, this paper designs the static measurement, secure transition, and verifies the safety of the calculation result. This method is effective to make it safer in ICS's startup, configuration, and runtime processes. This architecture will enhance the ICS′s ability of defense.

Abstract：In order to extract the driving area information of the unmanned vehicle, an algorithm of driving area information extraction of the multi-layer lidar is proposed. First, the curb point set is obtained by combining the feature of the radar return data with the data interval density distribution and the resulting road-point clustering is achieved by using KNN-OPTICS algorithm based on weighted Euclidean distance KNN. Then, both sides of the curb are fitted using the least square method. Finally，the improved OPTICS algorithm is used to cluster the obstacle points on the road surface, and the position, distance and size of the obstacle are calculated. Using the method of data interval density distribution, the curb points will not be affected by the obstacle and the road surface. The improved OPTICS algorithm is no longer bound by Eps and can distinguish the noise accurately. It solves the problem that the obstacle information is inaccurate due to noise. Experimental results show that the algorithm is accurate and effective.

Abstract：In order to solve the stability problem in flight control of four-rotor aircraft, especially the accuracy of attitude calculation. An improved EKF algorithm is proposed, the attitude data of the four-rotor are processed with two EKFs. And the state variables and the covariance are weighted and combined into the output state and covariance of the four-rotor to solve the attitude of the four-rotor in real time. The algorithm effectively overcomes the influence of non - Gaussian white noise on aircraft attitude calculation and reduces the filtering deviation of the attitude data. The simulation results show that the algorithm is better than the normal EKF algorithm, compared with normal EKF，the mean square error of improved EKF is reduced by 43.8%. The algorithm can effectively improve the robustness of the system. In the final test, the experiment is carried out on the four-rotor with NI myRIO as a core controller, and the correctness and validity of the improved EKF algorithm on the four- rotor system are verified, the algorithm can also satisfy the demand of real-time control.

Abstract：Aiming at the problem that the azimuth angle of the gyroscope exists integral error and the interference of the magnetic compass in the electronic compass solution, the Kalman filter and the complementary filter is proposed in the navigation system. Firstly, the optimal compute quaternion is obtained by Kalman filtering, and then the complementary filter algorithm is used to compensate the drift of the gyroscope to obtain the corrected quaternion.The obtained quaternionand Kalman filter to get the optimal estimate of the number of quaternion again and through the Kalman filter for the optimal estimation of the quaternion, and then achieve accurate positioning. In the experiment, compared with no filtering algorithm and single complementary filtering algorithm, the results show that the algorithm can not only solve the divergence problem of azimuth error, but also effectively solve the problem of magnetic field interference.

Abstract：Introducing the relay nodes in D2D（Device-to-Device） communication can extend the range of cellular coverage and improve the system performance. The selection of relay nodes is the key point in relay-assisted D2D communication. In this paper, a relay-assisted resource allocation algorithm is proposed. The selection of relay nodes is discussed, and the optimal relay nodes is considered both social relation factors and distance factors. This scheme guarantees the QoS（Quality of Service）of the communication link and maximizes the system throughput. The simulation results show that both distance and social factors have great influence on D2D communication, and considering the two factors are much better than only considering the social factors or distance factors.

Abstract：Aiming at the problem that the system platform and the development software are not easy to realize the cross-platform data communication, a cross-platform data communication scheme is proposed. On the basis of the functional analysis of data communication, it designs the whole system, splits the system modules, realizes the separation of the underlying network and the upper application. In the underlying network communication, through the application of the data packet size dynamic adjustment, large file intelligent compression and overload selective packet loss technical means, it realizes the overall optimization of the data communication. The local Socket message encapsulation technology is used in Qt platform to achieve inter-process and machine message communication, and realize the Windows message compatibility at the interface level. In different operating system platform,using their own optimal file sharing strategy, the file operation between machines is realized.

Abstract：In order to solve the problem of low utilization of spectrum resources，a global optimization algorithm for resource allocation based on Lagrangian duality is proposed for hybrid heterogeneous networks constructed by cellular users and D2D users. Under the condition of guaranteeing the QoS of cellular users, the algorithm firstly allocates the lightest uplink user resource block of the cellular users to D2D users, then the algorithm constructs the Lagrangian dual function, and iteratively calculates the optimal transmit power of the D2D users.The results show that the algorithm can maximize the throughput of the resource blocks in the system and make full use of them, and obviously improve the system throughput.Furthermore, the transmission power increases with the number of iterations, and when the number of iterations reaches 21, this trend will stabilize.

Abstract：An accurate network model and cell structure extraction method for the composite right-left handed transmission line(CRLH-TL) are proposed, which simplifies the design scheme of multi-section CRLH-TL. In the past, the conventional CRLH-TL network model and its cellular extraction method neglected the end-couple and space-wave effects, and the multi-section CRLH-TL structure cannot be designed accurately by the network parameters of the single cell. The precise network model is based on the simulation data of the cell structure, and the network parameters of the single cell and the distal effect are obtained, for the rapid and accurate design of multi-section CRLH-TL structure to lay the foundation. With this model method, the CRLH-TL leaky antenna with 30 unit cells is designed with the exact network model and extraction method. Compared with the CST full-wave simulation results, the calculation error of the radiation angle and the radiation beam width is less than 1° and 2° , which verifies the accuracy of the exact network model.

Abstract：Beidou′s short-message communication, which is a special feature of Beidou satellite navigation and positioning system, is especially used in the area which is beyond the coverage of general public communication. However, because of the limit in frequency of communication and the length of packet, the efficiency of Beidou′s short-message is not very high. To solve this, a compression method based on Beidou short-message is presented. This compression method includes two steps. The first step is called lossy compression. In this step, Spinning Door Transformation(SDT), which is a common compression algorithm in database field, is as a core algorithm for the stage of lossy compression. In addition, a revised BP Neural network PID controller is designed to adjust some parameters used in SDT. The second step is called lossless compression. A method called front extra byte lossless compression is presented in this paper. After a series of experiments, it can be concluded that the original industrial data has finished compressed successfully. In addition, variable precision of compression could be available during the compression.

Abstract：The existing BS(base station) sleep policy faced with the problem that how to improve energy efficiency while ensuring business QoS. This paper presents a method that Micro-BS and macro-BS cooperate to improve the energy efficiency of the system in intensive scene. First, the micro-BS with low service requirements enter the sleep state, in order to save the energy. Second, due to the wide coverage of the macro-BS, it can be considered as collaborative BS to assist the dormant micro-BS in dealing with some service. Finally, the different types of services are classified into multiple groups, so that macro-BS and micro-BS can separately process these services based on their features. The simulation results show that the proposed scheme has advantages over the existing BS sleep energy saving scheme.

Abstract：In order to meet the increasing requirements of mobile communication, the research of fifth generation(5G) communication system attracts people′s attention. In order to increase the system capacity, the Non-Orthogonal Multiple Access(NOMA) as a new multiple access technology is likely to be used in 5G. Using the Successive Interference Cancellation(SIC) technology in the receiver, multiple signals can be superposed together. This paper combines NOMA with the Multiple Input Multiple Output(MIMO) technology together which uses the zero-forcing beamforming. Each beam can have multiple users, and this paper discusses the user′s pairing. To improve the performance of the system, the user pairing algorithm considering the characteristics of the zero-forcing beamforming is proposed. Simulation results show that the algorithm has a good performance.

Abstract：An image retrieval method with high performance is proposed, which combing with texture classification and modified Fisher vector to realize image retrieval. First, the image is divided into non-overlapping image sub-blocks, each image sub-block is classified according to complexity of texture, and different features are extracted for different classes of image sub-blocks. Second, features are encoded by modified Fisher vector based on posterior probability, and the distance between two feature vectors is calculated segmentally according to product quantification and asymmetric distance calculation method, for rapid computing a similarity index and executing image retrieval. Experimental results for image retrieval on Holidays dataset show that, this method has high precision and recall, and less query time consuming.

Abstract：Since the cost of mobile device based remote control system is high, this design achieves the remote control system through the HTML5. The HTML5 client achieves the cross platform, regardless of the compatibility of the smart phone or computer platform. Through sending commands to the server and forwarding the command to the smart device, this design achieves the remote control. In addition, the Websocket owns the feature of the real-time and its outstanding advantages make procedures to achieve low delay.

Abstract：Coal mine gas early warning can be regarded as security classification problem, and the data show unbalanced distribution characteristics. Therefore, this paper presents a Cost-sensitive Hybrid Measure Attributes Selection Multi-Decision Tree(CHMDT) algorithm. It combines C4.5 and CART by hybrid measure as the attribute split selection method, which also considers cost-sensitive factor. The algorithm uses multi-decision tree building method based on different root node. The paper first uses 11 imbalanced data sets to illustrate the validity of the algorithm. Experimental results show that the proposed method can effectively deal with imbalanced datasets and improve the prediction accuracy of minority class under the high total accuracy performance. Moreover, the experimental results on coal mine gas early warning data show that the proposed algorithm can effectively improve the predicting performance of coal mine gas data.

Abstract：For the characteristic in processing signal of inertial sensor, the immune quantum evolutionary algorithm combining with orthogonal matching pursuit algorithm was designed for inerial sensor signal. The orthogonal matching pursuit was the key of the method, and the immunologic mechanism was introduced into quantum evolutionary algorithm. Firstly, in order to accelerate atomic search processing, the superposition of quantum codes was used to construct immune body, and the immune clone operation was taking to expanding population. Quantum crossover operation avoided the algorithm falling into local optimum at the same time. Then inerial sensor signal was reconstructed by taking optimal matching atom at each iteration to reduce the noise effectively. The simulation results verify that static signal zero drift value was greatly improved, and SNR was increased by about 10.48 dB mostly, and the dynamic signal′s mean square error was decreased 28.551(″/s). Compared with the traditional reconstruction algorithm under the same conditions, not only the noise was reduced effectively, but also time-consuming of the algorithm reduced by 4 s. Finally, the real-time processing of inertial sensor signal is achieved.

Abstract：Collaborative filtering algorithm is widely used in personalized recommender systems. However, prior collaborative filters which rely on pair-wise similarities, are barely applicable when faced with cold start scenarios, namely with new users or new items. To solve this problem, a novel recommender algorithm tailored for cold start is proposed, which is based on matrix factorization and neural network. Firstly, a matrix factorization is applied to the ratings, which finds out users′ vector representation in a latent preference space. Secondly, a neural network mapping users′ attribute data to their preference vector is trained. Finally, the recommender fuses the preference vectors originated from users′ historical ratings and from attribute data, to give smoothed recommendations to cold start users, veteran users and users in between. Empirical analysis on the MovieLens dataset demonstrates that when evaluated on new users, the proposed algorithm can boost prediction accuracy significantly.

Abstract：This paper mainly focus on the design of a dynamic resonance compensating device, which is based on the orthogonal magnetic core. By changing the inductance value of the device through different current input, the wireless charging system can be kept at the resonant state and maintain power transmission efficiency of the system. According to the experiment analysis, the device can effectively overcome the influence of the relative position between the primary and secondary coil, as well as the influence of load changing.

Abstract：The batteries with different performance advantage are adopted to cooperative control motor, allocated load output power reasonably,the problem of frequently large current discharge seriously affect the power battery life is solved. And through the monitoring and comparison of the SOC of the two batteries to adjust the optimal discharge threshold of the power battery, so that the battery power of the two batteries is basically used up at the same time. Simulation model is given by using MATLAB software to demonstrate the control system can accord to the load demand to adjust work mode intelligently. Start battery meet the peak power demand, so that power battery work in the smooth power range. The design prolonged the service life of power battery. Capacity balance control enables full utilization of two battery power and has a strong practical value.

Abstract：This paper presents a comparative investigation of single-stage BOOST and SEPIC power factor controller. Because of the careful design of parameters, the two converters operate in continuous conduction mode and have the same power level. A comparison among the two proposed topologies in terms of power factor，total harmonic distortion，efficiency and output voltage ripple factor is also performed. The value of the two converters in practical application based on the analysis is also presented. Finally, a LED driver was built to verify the correctness of the analysis result.

Abstract：In order to improve the lifespan of the LED driver and optimize its overall performance，this paper presents a novel non-isolated AC-DC converter based on CUK converter. The topology is implemented by adding a MOSFET to the basic CUK converter. In this paper，the structure is analyzed in detail and the LTspiceIV software is used on the open loop and closed loop simulation. Finally，the correctness of the analysis is verified by experiment.

Abstract：For the demand of the real-time detection and tacking of the spot in space laser communications，a image acquisition, transmission and display system was designed based Cameralink protocol. By using the programmable logic devices，the image data was received through Cameralink protocol and cached in on-chip RAM，then it was serial conversion high speed without compression. The data was transmitted to the host computer by a single mode fiber. The system architecture, transceiver hardware and software design et al. were discussed in detail. A experiment system was set up, and the experimental results show when the system will operate at a rate up 2.5 Gb/s，the image was accurately decoding and stable, reliable transmitted. The advantages of this system is high bandwidth, high quality images and high anti-jamming level. It meets the needs of the project application.

Abstract：Fault management technique is a method of avoid component/system failure of some or all, an important technology of protecting avionics systems and even aircraft safety and maintenance. For integrated modular avionics(IMA) system architecture showing the features of fault-intensive, multi-class, mutual influence and spread, a multilevel fault management mechanism was discussed. By fault detection measures, health monitoring mechanism, fault filtering methods and fault handling tools, with the reference of IMA system’s oriented domain hierarchical classification method, an avionics system multilevel fault management mechanism with module level, integrated regional level and aircraft level was realized, which makes avionics system failure can be automatically collect, filter, grade distribution and take over, failure spread was prevented and the aircraft safety was increased. Test and verification show the design meets the requirements，it has been applied in an aircraft.

Abstract：In order to reduce the driver and occupant injury, the airbag control system has become an important safety protection equipment. With the increasing number of airbags, it′s getting higher required on the real-time performance and the speed of ECU controller. At the same time, in order to increase the anti-interference and stability of the ignition algorithm, this paper designed an airbag control system based on 32 bit microprocessor MPC5634M. The system includes TLE6710Q integrated chip to achieve power management and ignition control, the system also includes MMA6825BKW acceleration sensor to detect the vehicle body acceleration. The software was programmed to determine if the airbag should be ignited by means of a variable width moving window integral algorithm. The test results show that the control system can effectively solve the problem of false positive ignition and false negative ignition, so as to improve the accuracy and stability of the algorithm.

Abstract：This paper introduces a passive sound detection system based on TMS320C6657, a dual-core DSP. The 24-bit simultaneous sampling ADC, FPGA and MCU are used to realize data acquisition, signal processing and human-computer interaction. The design of acoustic target orientation and identification software based on dual-core DSP is described in detail. The measured results show that this detection system has improved the performance of the existing system.