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A low noise interface application-specific integrated circuit (ASIC) for capacitive accelerometer is presented in this paper. A low-noise low-offset charge integrator is proposed to improve performance of the system. Correlated double sampling, closed-loop operational mode and PID controller are employed in this circuit to minimize the noise, offset and improve stability of the system. Meanwhile,...
One simple binaphthyl-bridged salicylidene Schiff base (2,2'-bis(3,5-dichloro-2-hydroxybenzylideneamino)-1,1'-binaphthyl (BCHB)) was successfully synthesised and modified into the channel of mesoporous molecular sieve SBA-15, which was functionalized with 3-aminapropyltriethoxysilane, through the hydrogen bond assembly. Detailed characterizations such as X-ray diffraction, transmission electron microscopy,...
In this paper, we present a new look at the sensing-throughput tradeoff problem. Distinguishing with the previous work, the throughput in our paper is defined as the number of data bits per second received correctly rather than the achievable rate. This choice facilitates the investigation on optimizing throughput for a frame based wireless data transmission scheme from a general point of view. Our...
Dynamic spectrum access (DSA) provides a more flexible spectrum management method versus the current command and control method and promises much higher spectrum utilization efficiency. By this paradigm, secondary users can use vacant spectrum while guaranteeing non-interference to incumbent users. Therefore, spectrum awareness is a required function in DSA, and cooperative spectrum sensing is widely...
Cognitive radio is a novel technology which can efficiently improve the spectrum utilization. Spectrum sensing is one of the most critical components of cognitive radio technology. In this paper, we investigate the performance of spectrum sensing using diversity technique. Energy detection is utilized to check the presence of primary signal. For the case where equal gain combining technique is utilized...
We present a compressive wide-band spectrum sensing scheme for cognitive radios. The received analog signal at the cognitive radio sensing receiver is transformed in to a digital signal using an analog-to-information converter. The autocorrelation of this compressed signal is then used to reconstruct an estimate of the signal spectrum. We evaluate the performance of this scheme in terms of the mean...
We consider a compressive wide-band spectrum sensing scheme for cognitive radio networks. Each cognitive radio (CR) sensing receiver transforms the received analog signal from the licensed system in to a digital signal using an analog-to-information converter. The autocorrelation of the compressed signal is then collected from each CR at a fusion center. A compressive sampling recovery algorithm that...
We propose sensing protocols for a cognitive dual-hop relay system where transmission from source (S) to destination (D) is accomplished over two phases with the assistance of a relay (R). A naive sensing protocol is to perform sensing at S and R before the respective transmission phase. This leads to substantial loss in spectral efficiency. We propose a sensing protocol where sensing is only performed...
We present sensing and communication protocols for a dual-hop sensor relay network operating on secondary basis in licensed spectrum. We consider a two-phase communication protocol: in the first phase, the source node transmits to the relay and in the second phase, the relay node transmits to the destination node. A naive sensing protocol is to perform sensing in slots that are scheduled prior to...
A key problem of a mobile robot system is how to localize itself and detect objects in the workspace. In this paper, a multiple sensor based robot localization and object pose estimation method is presented. First, optical encoders and odometry model are utilized to determine the pose of the mobile robot in the workspace, with respect to the global coordinate system. Next, a CCD camera is used as...
In this paper, an automated industrial fish cutting machine, which was developed and tested in the Industrial Automation Laboratory (IAL) of the University of British Columbia, is presented including its hardware structure, control sub-system, fault diagnosis sub-system and the remote monitoring sub-system. First, the hardware of the machine including the mechanical conveyer system, pneumatic system...
Robot-assisted urban search and rescue is an emerging topic in the field of robotics and it calls for new approaches of control. The focus of this work is the application of fuzzy logic in the grasping of objects with unknown characteristics such as rigidity and surface texture. In the task of disaster response, a rescue robot will encounter both living and non-living objects in the field. Then, the...
The future of robotics is not limited to factories and homes, and is extending to robot-assisted urban search and rescue. This paper proposes a new application of neural networks in this emerging field of research. Specifically, a neural network with feedforward architecture using the backpropagation learning algorithm is implemented in order to determine the positioning of a robotic gripper that...
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