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Considering the problem of the highly dependence on the accuracy model information of the industrial control process, an online PID parameter tuning method is proposed based on the simultaneous perturbation stochastic approximation (SPSA) algorithm and the traditional PID control only by the input and output data of the system. Interfering with each component of the PID controller parameters simultaneously,...
Physical Unclonable Function {PUF) is severely threatened by modeling attacks. This paper proposes a novel Polymorphic PUF for CPU+FPGA SoC. We fully exploit the dynamic reconfigurability of the SoC to minimize the Challenge Response Pair (CRP) correlation so as to resist modeling attacks. An asymmetric RO pair is proposed to produce the response. Experiments on real CPU+FPGA SoCs show the high resistance...
Physical Unclonable Function (PUF) is a new hardware security primitive that exploits the manufacturing variations of integrated circuits. Traditional arbiter PUF is vulnerable to machine learning based modeling attacks due to its linearity. Current mirror PUF uses non-linear current mirror to bring non-linearity into the challenge-response relationship and is claimed resistant to modeling attacks...
In order to meet the requirement for automatic production, a pollination robot system for tomato flower on the inclined-wire culture was designed. The robot is composed of a platform vehicle, a binocular vision system, a manipulator with four degrees of freedom and an end-effector. Based on the tomato cultivation restriction, a collision-free motion of the manipulator was planned to move the end-effector...
Real-time obstacle avoidance is one of the key issues to successful applications of mobile robot in the complex and unknown environment. However, now commonly used local obstacle avoidance strategies have some deficiencies. For example, VFH is superior to path planning, but it is not optimal when encountering with a obstacle which suddenly appears in front of the mobile robot. By the development of...
In frontier-based exploration, the primary work is to iteratively detect frontiers and generate frontier points to guide the mobile robot to explore the unknown environment. However, most frontier detection algorithms detect the frontiers by processing the entire map data. This is a time-consuming process. In this work, we present a novel approach to dynamically generate safe and reachable frontier...
Multi-CCD panoramic camera electronic image stabilization is a technique which uses image processing to reduce the wave-like fluctuation among multi-camera images caused by camera carrier jittering. In fact, real-time processing is necessary in video stabilization applications, the previous methods cannot satisfy the requirement of real-time processing. There are several steps in need of real-time...
CCSDS File Delivery Protocol is an important protocol providing reliable delivery services for space communications. In this paper, a periodical service curve model for CCSDS file delivery protocol of deferred negative acknowledgement with Fractional Brownian Motion (FBM) as arrival model of spatial data service flow is established. Meanwhile, numerical analysis upon delay bounds, throughput and bit...
Aiming at the shortages of positioning technology in Wireless Sensor Networks (WSNs), a fuzzy positioning algorithm based on WSNs is proposed. Line segments connecting anchor nodes intersect and the algorithm regards intersection points as sample points which should assist with the positioning and improve positioning precision when there are fewer anchor nodes. The positional relationship of the sample...
The ant colony algorithm of routing technology in a communication network had a broad of applications. The usage of ant colony algorithm to exchange data for distributed databases had not been studied deeply yet. On the purple of solving the dynamic, real-time data exchange problems, the ant colony algorithm model with multi Constraints for routing a data packet was discussed in this paper, to realize...
We demonstrate a stabilized single-longitudinal–mode fiber ring laser using tandem-Fabry–Pérot-microcavities (T-FP-MCs) as the all-fiber intracavity filter. The T-FP-MCs are formed with short adjustable air gaps between pairs of vertical cleaved single-mode fiber ends without mirror-coating deposition. The T-FP-MCs' spectral filtering effect is analyzed with the Rouard's method. Mode-hopping-free...
Quality of service routing (QoSR) is a routing mechanism based on the data flow request and available network resources. Generally in information communication a Dijkstra algorithm for traditional uni-cast network transmission was adopted to calculate the shortest path of a peer-to-peer routing. Based on an improved Dijkstra algorithm for dynamic and realtime transmission on WAN, the QoS routing algorithm...
Due to the inability of traditional keyword-based retrieval using semantic meaning in Peer-to-Peer networks, large bandwidth is wasted; meanwhile desirable information is still far beyond the search results most algorithms could gain. How to locate the needed peer accurately and how to obtain requested information rapidly are important issues. In this paper, through an automatic study mechanism toward...
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