Abstract: For resolving the poor efficiency in reducing the positioning error and low stability in the location algorithm based on RSSI trangle`s centroid,this paper provide an improved localization algorithm.By the simulation results show that the improved triangle centroid localization algorithm has higher efficiency in reducing the positioning error and performance,meanwhile,ensuring the stability of positioning.

Abstract: To improve the performance of web cache,a new cache replacement algorithm named PGDSF-AI is proposed.The Algorithm is based on multi-Markov chains prediction model and characteristics of user browsing is used.Firstly,the Web users are classified according to browsing characteristics and a classified-Markov is built for a classified users,and then multi-Markov chains prediction model is constructed.Then,the prediction model is forecasted based on user access sequence and the target set of prediction is formed.When the cache has not enough space to accommodate new request,replace the key which is the smallest and does not belong to the target set of prediction.The average interval is used to avoid objects long time no access retaining in the cache.Experimental results have showed that the proposed algorithm had good performance.

Abstract: This paper presented a improved SIFT algorithm,and applied this algorithm in image matching.Firstly, integrated the Canny algorithm into the improved algorithm,excluding the edge points.Then,ratio between the first and the second closest distance is used to match the 96-dimensional vectors.Finally,eliminating the inaccurate matching by using RANSAC method.The experimental results show that,compared with the original SIFT algorithm,the modified algorithm can effectively improve the precision of image matching,and the matching time is decreased about 15%.

Abstract: Based on the analysis on UVM,this paper focuses on the implementation method of reusability and automation.The reusability is reflected by the horizontal and vertical reuse of verification components and the inheritance and combined reuse of verification scenarios.Automation implementation relies on Field-Automation mechanism,script-controlled RAL model generation at platform constructing phase and the simulation results realtime compare online at platform running phase.Finally,the PCI Express Controller verification has been completed to illustrate the method of building the structured UVM verification platform rapidly guided by automate and reuse approach.Verification results show that the automation and reusability implementation method can significantly improve verification efficiency.

Abstract: A large integer multiplier is the engine of cryptography chip and determines the performance of cryptography chip.In this paper,we propose a new implementation of radix-4 modified Booth encoding,which has a shorter delay than methods proposed in previous works.Upon this encoding method,we also propose a new structure of 256-bit three stage pipeline multiplier.After synthesizing based on SMIC 0.18μm CMOS process,the critical path delay of the multiplier is 3.77ns,which is superior to that of other multipliers.

Abstract: This paper uses tabu algorithm to optimize the topology and puts forward the methods which is choosing topology reconstruction is involved in all nodes or directly to connect the surviving nodes before and after death node on the chain according to whether death nodes is on the long chain,in the event of node dies.At the same time,when cluster leader is choosing,the paper presents a algorithm which is comprehensive consider that the energy consumption of minimum residual energy nodes in the next round,residual energy of nodes and the distance to base station,in data transmission phase,compares the distance of the nodes to the next hop node with the distance of the node to the cluster head nodes,chooses the shorter path.Simulation results show that the lifetime of the first dead node is more than 4.9times of such node in PEGASIS,the death time of half of the nodes is also longer,so as to improve the survival time of the whole network.

Abstract: As a popular Non-Volatile Memory technology,Phase-Change Memory(PCM)is considering as the most potential candidate for DRAM due to its comparable read latency with DRAM,high capacity and low idle power. But hybrid memory architecture which consists of both PCM and DRAM is suggested due to asymmetric read-write and limited endurance of PCM device.In this paper,we propose an efficient management with hotspots controlling to reduce power consumption and improve PCM lifetime for PCM-DRAM flat hybrid main memory system to avoid the dense read or write access to memory hotspots caused by locality.

Abstract: An improved GAF which changes the perfect square network into regular hexagon as well as hierarchical group control mechanisms achieves a better purpose of saving electricityThe analysis of GAF and improved GAF algorithm on the basis of MATLAB in high-speed environment and low-speed environment shows that the improved GAF precedes GAF in network lifetime,average data transmission delay and packet delivery rate

Abstract: Traditional target hovering detection methods have many limits and shortages which cannot accurately determine the target behavior.In this paper,object trajectories are gridded,a new target detection method for moving object trajectories was proposed.Firstly,the moving targets were detected with the background difference method.Secondly,the moving target in image sequence was tracked according to the Camshift algorithm.Then the moving target trajectory in the defense area was gridded and some statistics were analyzed.At last,the hovering behavior was detected and the alarm was triggered.The experiment results show that this method can judge several typical hovering behavior accurately and in real-time.

Abstract: On the basis of existing algorithms,this paper,adapting 3*3template,improve the algorithm.Without reducing the real-time,it simplifies the hardware structure.As result of simulation and analysis results of experimental,it can be concluded that the feasibility of this algorithm in image filtering processing,and can meet the real-time requirement.

Abstract: Introducing chaotic factor as a local operator of cuckoo search algorithm,a method was presented to calculate two dimensional numerical integration based on chaotic cuckoo search(CCS)optimization algorithm.CCS algorithm selected some initial partition points randomly on the both direction range in rectangular integral domain and then to optimize these points.Points optimized would be as the segmentation nodes to solve two dimensional numerical integration.The experimental results show that our algorithm is easy to implement and has fast convergence speed and high integral value accuracy.Therefore,CCS is an effective method for solving the two dimensional numerical integration.

Abstract: The problem of Multi-tag collision is inevitable in the RFID system so that anti-collision algorithm is the key to realize the tag identification rapidly.In this paper,an improved binary search anti-collision algorithm is proposed based on some related anti-collision algorithm.This algorithm uses collision bits to construct quad tree, which reduces the search times and the amount of transmission information of readers to improve the system efficiency.The experimental results show that the proposed algorithm performs significantly better than the existing anti-collision algorithms.

Abstract: In this paper,a method of image retrieval based on block local binary pattern is proposed.To improve the original LBP,the average local gray level of a 3×3local area is used to calculate the value of LBP instead of the gray value of its central pixel.Then,the image is divided into several different sub-blocks.Thus the better local features of the image can be extracted.Compared with the method of original LBP,the result of experiment shows that the method of image retrieval based on blocked local binary pattern can achieve higher precision.

Abstract: The characteristics of cloud computing such as openness,sharing,make the access control more complicated in cloud computing than it in traditional environment.In order to guarantee the security and reliability of cloud users and the data on the cloud server in the accessing process,this paper put forward an access control model named CT-RBAC in cloud computing.This scheme divided the security level of the data on the cloud server and cloud users,and introduced the set of task situation,what′s more,it achieved the access control policy from five aspects.Finally,it gave out the implementation process of cloud users access the data in the cloud.The analysis results indicate that CT-RBAC has its obvious advantages.This scheme improves the monitoring ability of the object owner to the cloud server,guarantees the security and reliability of data,and ensures the well flexibility.

Abstract: To the problem of low efficiency and high energy consumption for the traditional forest fire prevention methods,this article discussed the significance of forest fire prevention based on Sea computing,and put forward the implementation of forest fire recognition algorithm based on Sea computing.Firstly,used Qt/Embedded to design according to the characteristics of the sensor node.Then,used 24-bits additive color model and Sobel operator to complete the decision of color and region based on the features of forest fire.Finally,the results were fed back to the sink node.This algorithm could automatically analysis image captured by camera and complete the decision of fire in sensor node.The experiments showed that,compared to the traditional methods of forest fire prevention, this algorithm not only completed the instant detection and recognition of forest fire,but also achieved high accuracy rate and low time-consuming at the same time.

Abstract: On-chip debug is essential for design and development of embedded systems and software.UART based in-circuit debug system is designed for our PKU-DSP II system-on-a-chip.With the assist of debug data channels and pipeline control unit within the processor,the on-chip debug module can support functions such as hardware/ software breakpoint,single-stepping,system reset as well as online program downloading and debug software with GUI is developed for host computer.Accurate pipeline control technique and proper handling of pipeline missuspending provide the debug system the advantage of zero timing overhead.The FPGA prototyping results show that the proposed design is correct and the hardware cost increases by no more than 3% without reducing the performance of the system.

Abstract: Considering the redundant feature points,high computational complexity,low robustness in image mosaic method based on scale invariant feature transform(SIFT)algorithm,a steady and fast image mosaic algorithm is proposedThis paper introduces Harris corner operator into the process of extracting feature points based on SIFT algorithmThe improved SIFT algorithm picks out Harris corners from the SIFT feature points when checking them in multi-scale space,chooses feature points that stand for image informationPERANSANC algorithm is used to compute the homography matrix between the two imagesThen the detected corners are regarded as moving objects in the images,located accurately by the KLT track algorithm and the homography matrix is refinedThe experiments verify the algorithm's efficiency and robustness

Abstract: The typical PID control has been unable to satisfy the requirements of industrial robot control at present,an application method based on an improved genetic algorithm for industrial robot control PID is proposedFirst industrial robot for a simple description,then the idea of using bacterial conjugation,for conventional genetic algorithm was improved,combined with PID control robot is proposed an adaptive PID control strategyThe simulation shows that the improved genetic algorithm can make the robot adaptive PID control rapid convergence to the desired value,the convergence of high precision,and for regular outside interference,a certain degree of robustness to meet the requirements of robot control

Abstract: The comments issued by the Water Army were repeatability and similarity.A method to find Water armies in weibo based on Text similarity was proposed.Comments are represented by signatures.By indexing the signatures on efficient B-Tree,the whole system had extreme processing efficiency.According to the repeatability and similarity characteristics of the comments issued by the Water Armies,the users which defined as Water Armies had a high number of occurrences when analyzed on the same or similar comments.And then analyzed the comments published by those users,found that those comments were almost similar.Experiments showed that this method could find the Water Armies accurately and effectively.

Abstract: In this paper,we pose semi-supervised ontology algorithm under the framework of the regularization such that the information of unlabeled data is fully integrated into the calculation model.At the same time,the data is embedded in the feature space,and feature space regularization semi-supervised ontology learning algorithm is given via the feature representation theory.Two experiments show that the new algorithm for specific applications with high efficiency.

Abstract: This paper builds a FPGA verification and test system for cryptographic chip based on PCIE communication.The system provides the method of FPGA verification before tapeout and test after tapeout for SM234 cryptographic chip.Using FPGA implements logic of the cryptographic chip to verify the chip function and reduce the risk of tapeout.Meanwhile,the system provides a feasible chip test scheme for the post test to cut down the test time.Given the requirement of high-speed data transmission,the system selects the PCIE bus to complete the data transmission between card and computer,improves the efficiency of SM234 cryptographic chip verification and test plan.

Abstract: A 3th-order active-RC complex filter is fabricated in 0.18μm CMOS process for the wireless sensor network Radio-Frequency receiver.The centre frequency of complex filter is 3MHz and the-3dB bandwidth can be programmed to 250kHz or 500kHz or 1MHz or 2MHz.The simulation results show that,the passband gain is about 10dB,the image rejection ratio is greater than 35dB,the noise figure is less than 45dB and the third-order intercept point is greater than 29 dBm,The circuit consumes about 0.9mA current.Through the certification of the simulation,the performance indexes of this design can meet need of the Wireless Sensor Networks Radio-Frequency receiver.

Abstract: According to the power consumption of 2.4GHz active RFID tag,the paper proposes a dynamic frequency modulation low power design method.Tag uses NXP′s LPC1758MCU and TI′s CC2520RF chip.The frequency is controlled by changing CPU clock source,configuring PLL value and CPU clock frequency divider.Tag adjusts the CPU clock frequency adaptively according to the characteristics of the code fragment operation.It is found that the power consumption on standby of the tag of dynamic frequency CPU is half of common tag from the outcome of experiment.

Abstract: According to the phenomenon,an integrated design program was advanced which combines fault diagnosis with Hardware Evolution.By making full use of the advantage about Evolvable Hardware(EHW),like selforganizing,adaptive,self-repair and so on,accurate faults location was avoid so as to realize the self-repair of faults.The preconditions of achieving faults self-repair based on EHW were analyzed,and the theory of Evolution Dictionary was advanced.By combing fault diagnosis with EHW organically,the available technology methods of faults self-repair are extended.

Abstract: In this paper,the constant speed control system of hydraulic control frequency stabilization based on feedforward and PID control technology is researched,compared with the situation that the complicated electronic converters that the traditional variable speed wind power is required need high cost.After that,this paper comes up with the composite speed control method and proceed with the field test.Through the field test,the system can ensure the constant speed output of the motor and meet the high quality power requirements.

Abstract: In recently years,radio frequency identification(RFID)technology has been widely used.For security issues of RFID,this paper analyzes the advantages and disadvantages of several recently proposed protocols and gives some comparisons of the security properties.A new secure and efficient RFID mutual authentication protocol based on Hash function is proposed.The scheme established by the refreshed dynamically and self-synchronize of the tag's ID has the properties of untraceability,indistinguishability,resistant to the replay attack,spoofing attack,desynchronize attack and denial of service attack etc.,so it can effectively solve the security issues of the RFID system.The scheme is especially applied in low cost、limited computation and large-scale RFID system.

Abstract: In order to improve the network efficiency,this paper present a kind of TCP-Like congestion control algorithm used in the transmission based on RTP/RTCPAlgorithm uses the TCP validation mechanism and the flow model and the parameter definition of RRT and overtime clock value is presentedAIMD is used to improve window control mechanisms and adjust the transmission rate of RTP data frameAt the same time the TCP retransmission mechanism is completely abandoned to ensure the continuity of streaming and real-timethe experimental results show that the algorithm enhances the network bandwidth utilization and improves the congestion control capabilities and fairness