Abstract:In the process of obtaining video，many factors lead to the degradation of the video quality，and lower the spatial resolution of video；on the other hand，the exposure time and the frame rate of camera limit the time resolution of video. Video super-resolution reconstruction is an effective way to improve the temporal resolution and the spatial resolution of video，which has aroused wide concern in computer vision and image processing fields. In this paper，the concept of video super-resolution is described and the development phases in recent years are reviewed. In addition，some of the key technologies are analyzed. Furthermore，the challenges in this field are pointed out. Finally，the application of video super- reconstruction technology is prospected.

Abstract:With the development of Internet applications, users’ demand for bandwidth is soaring sharply. Meanwhile，along with the development of broadband access technology, the endpoint can also adopt multiple network accesses. But due to one-way communication of traditional Transmission Control Protocol(TCP)，the waste of resources will exist. To this end，IETF has specifically proposed Multi-Path TCP(MPTCP) to implement TCP multiplexing，thereby enhancing the efficiency and robustness. This paper gives a review of the IETF’s research on MPTCP，including MPTCP architecture, routing and congestion control, aiming to provide a reference for deeply studying.

Abstract:The information-based radar terminal system provides a new technical platform for realizing radar remote display and control. Compared with the traditional radar terminals, the processing of information package is the core of the information-based radar terminal, it records all the information needed by radar terminal system, provides a good foundation for the implementation of the radar's remote control and display. Based on this, this paper applies the mature networking technology to realize the terminal remote control and display radar system. This system bears the advantages of strong generalization and low cost. The design has been applied in the actual project and shows stable performance.

Abstract:Aiming at the problem of beam-dwell scheduling for digital array radar，the algorithm based on analyzing scheduling interval was studied. This algorithm analyzed the dwells applied to be executed in one scheduling interval and introduced pulse interleaving. The scheduling criterion took both priorities and deadlines into account fully，with the Task Drop Ratio，Hit Value Ratio，Time Utilization Ratio as evaluation indexes. The simulation results showed that the modified deadline criterion mainly emphasized the urgency of tasks，while the modified priority criterion mainly emphasized the importance of tasks；the deadline-priority and priority-deadline scheduling criterions could make good balance between urgency and importance，thus superior to other criterions in overall performances.

Abstract:According to mathematical definition, airborne single-station ranging only based on Doppler shift measurement can be realized by the approximation to Doppler changing rate equation. On this basis, the expressing of average for Doppler changing rate in a time interval is researched. On condition that airborne measuring station is in uniform linear flight motion, the analysis shows that the average value of Doppler changing rate is directly related to the product of tangential velocity at two terminals and is inversely relative to radial distance at end position in a time interval. And the analog calculation verifies that the better ranging result can be obtained only from this average expression. As contrasted to existing method, the ranging method derived in this text requires neither to detect Doppler changing rate directly nor to be used with other location method. At the same time, according to research effort in documentation, the airborne single-station ranging can be realized only based on frequency measurement after detecting and obtaining the measured signal center frequency. The result in this text has laid an application foundation for directly utilizing Doppler principle to realize accurate ranging.

Abstract:Target orientation using multiple passive buoys was studied. A kind of passive target orientation algorithm based on least square algorithm was put forward under the condition of knowing the range differences between each buoy and target, namely, a method to realize target orientation while making the square of localization error least. Based on the analysis of localization rule and localization error of this algorithm, orientation performances were simulated by using Monte-Carlo for far-field and near-field cases. Under the condition of some hypothesis, the effects of different measured range differences on the target location error, location RMS error and bearing error were analyzed by simulation, and the orientation performances under two cases of far-field and near-field targets were analyzed and compared.

Abstract:To tackle with the parameter uncertainty in emitter recognition problem, a recognition method based on least square error model is presented. First, the square error of characteristic parameters is calculated relative to those in database for the emitter, then, the degree of membership of the emitter is determined based on least square error. Unlike geometrical distance model and cloud model, the proposed model takes multi-values and correlation of each parameter(PRF,PW and ASV) into account. Simulation results show that the emitter recognition rate of this model is higher than that of the geometrical distance model and cloud model by 5% and 40% respectively.

Abstract:The main differences between warhead and bait are their movement ways in the midcourse of ballistic missiles，and rolling motion is the major way for bait. The motion model was established based on physical，movement and scattering characteristics of midcourse rolling targets，and the mathematical expression of the wideband Linear Frequency Modulation(LFM) radar echo was deduced．Then wideband radar echoes were simulated and rolling period was estimated based on the changes of target radial length．The simulation results indicate that the wideband radar echoes of midcourse rolling targets have something to do with the target attitude motion parameters and the physique parameters，which will provide an important basis for midcourse target identification.

Abstract:A novel quasi-Yagi antenna was proposed with broad-band and broad-angle characteristics. CST microwave studio, high frequency structure simulation software based on Finite Integration Method(FIM)，were used to analyze the antenna performances. Two methods to extend beam width were simulated，and the method of adding rectangle microstrip patches as radiating element was selected at last. After being optimized with simulation software，the results of the modified quasi-Yagi show more than 120°beam width both in E-and H-plane and a relative bandwidth about 40% for Voltage Standing Wave Ratio(VSWR) of less than 2.

Abstract:To reduce the noise of receiving front-ends，the design and fabrication of an ultra-wide band Low Noise Amplifier(LNA)，were presented based on negative feedback and wide band matching technologies. The amplifier tube ATF-54143 made by Avago was chosen for this design，whose key indexes were simulated and optimized by using ADS2009. The test results indicate that the gain is greater than 24 dB；the flatness is lower than ±2 dB over the four octaves 0.2 GHz-3.2 GHz. Noise Figure(NF) is below 1.2 dB over 0.2 GHz-2 GHz；and less than 1.5 dB over 2 GHz-2.6 GHz；less than 2 dB over 2.6 GHz-3.2 GHz. The good performance of this amplifier satisfies the requirement of engineering application，and it can be applied to the receiver front-end of communication systems.

Abstract:When the transmitters work，there would exit an initial phase difference between different carrier waves，which causes serious influence on calculating the pattern of an antenna array. A method of measuring phase difference based on Hilbert transform was proposed，and an effective method of phase compensation was also introduced. The phase difference of the transmitter’s output signals was obtained by Hilbert transform，and then was taken as a parameter of the compensation algorithm to compensate the phase difference. The simulation results show that the influence caused by initial phase difference can be reduced by adopting this method.

Abstract:Frequency Agile Radar(FAR) is recognized as the most promising radar，which is divided into incoherent and coherent types. Focusing on the varied phenomena of the remote sensing curves for Local Oscillator(LO) power in a certain FAR，this paper analyses the reasons of their variation during test basing on the Frequency Agile techniques, LO system, telemetry readings etc. The working condition of this LO system is proved to be in normal at last, which removes the long-standing worry about the key capability of this type of equipment from judge department，and exerts great engineering benefits.

Abstract:Audio graphic equalizers are implemented by filter banks. State-of-the-art algorithms either suffer poor performance in frequency response, or work on high complexity. When two adjacent bands are expected to lift or attenuate by equal amount, huge ripples appear in frequency response. This paper analyzes inter-band interference model, and the relationship between peak gain with its spectral leakage in bell filter. Finally, an offline design method and a reference look-up table are presented to reduce the complexity and eliminate the spectral ripple.

Abstract:Some methods of symbol rate blind estimation are introduced. And the basic method based on the cyclic correlation is briefly reviewed. A fast realization method of symbol rate blind estimation based on the cyclic correlation is proposed through theoretic analysis. The method adopts FFT instead of the cyclic frequency scanning. The analysis of the calculation amount shows that the new method is faster than the basic one. Simulation results validate the method. Finally, the defects of the method are analyzed and the solutions are introduced.

Abstract:The variable step-size affine projection algorithm attracts wide attention for its advantages of simple frame, fast convergence rate and so on. However, the high complexity of this algorithm limits its application. To reduce its complexity，a new method is proposed which changes its step size based on evolving order. According to the condition of convergence on the Mean-Square Deviation, the algorithm decreases its order as iteration goes on. Simulation results show low complexity, fast convergence rate，and low misadjustment of the proposed algorithm.

Abstract:This paper mainly study the edge extraction algorithm of thenar palmprint image. Some classical edge detection operators and Hough transform are introduced. The wavelet modulus maxima multi-scale edge detection method is highlighted. A multi-scale Gaussian edge detector is constructed. According to the characteristics of cross-scale transfer of wavelet transform modules for the noise and the image edge, the method of wavelet modulus maxima multi-scale edge detection is adopted to extract the edge of the thenar palmprint image. The experiment results show that this algorithm can reduce the effects of noise and detect rich edge details; meanwhile, the position of fused edges is precise. Whereas, it has the deficiency of poor continuity at the edges.

Abstract:Aiming at the actual application of communication countermeasure, a new method about accurately estimating the hop duration was proposed for the Frequency-Hopping(FH) signals. It applied Short Time Fourier Transform(STFT) to process FH at first, then obtained the peak sequence from the results of STFT, and sampled the peak sequence in single-bit way, so the hop duration estimation could be obtained from the final single-bit sample sequence. The algorithm was simulated and its results and performance were analyzed. It is showed that the algorithm is efficient when SNR is greater than -1 dB. The method is simple, effective and easy to be implemented.

Abstract:To tackle with the problem that the rotation of displaying image disturbs the operator in modern weapon aiming system，this article proposes a kind of design for eliminating display rotation of image-watching-aiming-system based on Field Programmable Gate Array(FPGA). This scheme obtains rotation carriage information from the plat roof carriage sensor，rotates the displaying image reversely，eliminates the rotation of displaying image，and conveniences the aiming of operators. This scheme also expands the ability of changeable focus successively，solves the inconsistence of resolution ratio between the displaying and the operational stick，and improves the perfect precision of aiming.

Abstract:Since Comprehensive Test Ban Treaty to ban all nuclear weapons test explosions has been passed, Quantification of Margins and Uncertainties(QMU) for certifying the availability of the Nuclear Stockpile in the USA is a newly presented method. It is able to reveal the failure fact efficiently and give QMU in assessment combining with the information of tests and numerical simulations. Although QMU is still under development, it can provide a reference for the effectiveness evaluation of complex systems. The determination of the critical characteristic parameters is one of the key techniques in QMU. In this paper，a method is presented to quantitatively analyze the relational degree between the requests on critical characteristic parameters and the characteristic parameters，by utilizing the uncoiling matrix of critical characteristic parameters，then the critical characteristic parameters of the product are determined.

Abstract:Signal detection is the primary job and the key technology in cognitive radio. In this paper，in order to get a superior detection performance under low Signal Noise Ratio(SNR)，a method based on the sample autocorrelation of received signals is adopted to detect the existence of authorized users’ signals. Then Binary Phase Shift Keying(BPSK) signals and the captured digital television signals are adopted as signal sources to simulate the detection algorithms in MATLAB simulation. The detection results demonstrate that the adopted method outperforms energy detection in Rayleigh fading channel and under low SNR(RSN≤–14 dB) conditions. Moreover，the overall correlation degree of received signals show some effects on detection probability.

Abstract:It is difficult for a force sensor to measure the force when it is in the centrifuge acceleration field. Basing on the fundamental principles on the force measurement and the force analysis of a six-dimensional force sensor in centrifuge acceleration field, this paper introduces a decoupling method in the force measurement, and develops a set of software for measuring six-dimensional force in centrifuge acceleration field.Test results has validate the effectiveness of this software.

Abstract:This paper presents a permanent magnet vibration-based power generator based on Micro Electro Mechanical Systems(MEMS) technology. It can scavenge vibration energy and convert it into electrical power. It includes a fixed micro coil and a movable permanent magnet attached on a nickel planar spring integrated with silicon frame. The two-layer copper micro coil and nickel planar spring on silicon are fabricated using bulk-silicon micromachining and microelectroplating technique. Two prototypes with different coils and same magnet-spring system are assembled and tested. Prototype A can generate maximal load voltage of 51 mV and load power of 5.89 μW at 222 Hz resonant frequency and 9.8 m/s2 acceleration. At the resonant frequency of 247 Hz，prototype B generates maximum load voltage of 62 mV and load power of 6.4 μW for acceleration of 9.8 m/s2. The coil’s area of 6.25 mm2 in prototype B is only 28? of that of 22.56 mm2 in prototype A，however，the load voltage and load power are increased by 21.6? and 8.6?，respectively. The analysis about the difference of output performance of two prototypes is also given in this paper.

Abstract:There exit similarities as well as a great difference between embedded software testing and common software testing. Embedded system testing has close relationship to system software & hardware platform, and also has special requirements on test environment and test methods. Test case design is the core of software testing, which determines the effect of software testing. Software testing environment can be more easily injected for test case and directly affects the efficiency of software testing. This paper discusses embedded software testing techniques，analyzes the method to generate test case by using UML, presents the principle about adopting VI technique to construct simulation test environment. A certain embedded software system has been tested by using the methods proposed in this paper.

Abstract:This paper proposes an arithmetic of 3-D house rebuilding based on image understanding according to the standard rules of graphics in the architecture industry. The arithmetic picks up midlines of walls from the architecture drawing in order to obtain the whole topology of the house combining the rules of architecture drawing, image understanding and artificial intelligence; and then distinguishes two important members: door and window from the graphic; at last rebuilds the 3-D house. The result of the experiment indicates that the arithmetic is effective for actual architecture drawings with the help of man-machine conversation.

Abstract:Accurate spare forecast is the basis of effective logistics supporting. An analytic method was put forward according to the reliability and maintenance parameters to determine the spare demand. Based on platform of Exspect and Petri net，a simulation method was used to calculate an example task. The spare demand was determined and different spare support schemes were compared to obtain the optimized value. The effectiveness of this simulation model was demonstrated through a particular case.

Abstract:In order to reduce the expenses for developing radar simulative training software, to enhance the flexibility of the software, and to shorten the development cycle，a kind of developing method of simulative training software based on ActionScript was put forward according to its requirements and characteristics. Taking the simulation of target and locus as an example, the developing process of this software was explained in detail. The results indicate that the development method for similar software based on script language is simple, vivid and highly efficient.

Abstract:P2P software is widely used in networks．It is a very important issue that how to identify P2P data flows fast and effectively. The traditional P2P identification methods are not suitable to widely applied dynamic port and the content encryption. Combining with data mining classification, this paper proposes a new decision algorithm based on distance decision function according to the dynamic characteristics of P2P flows, including IP packets numbers，percent of UDP and link-numbers. The experiment results show that P2P data flows can be identified and predicated quickly and effectively using this algorithm, therefore P2P flows can be monitored.

Abstract:With the rise of offshore oil development projects，drilling platforms in sea towage operations have been developed rapidly，and towing operation has attracted more concern and attention. In this paper，the composition and working principle of rig towing and ship dynamic monitoring system are discussed in detail, reasonable proposals of implementing each functional unit are put forward. The application of the system has greatly improved the modern management of the offshore drilling platform and the ship, and realized high efficiency and safety of towing vessel mobilization. It can provide a reference to the related industries.