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A generalization of the Chinese Remainder Theorem (CRT) combining method is proposed to design much more and better quasi-cyclic (QC) LDPC codes when the parity check matrices of the component codes are given. It can design a much larger class of QC-LDPC codes with similar performance by loosening the condition for determining the intermediate parameters.(More)
A feedback belief propagation (BP) decoding algorithm for low-density parity-check convolutional codes is proposed. The proposed algorithm can activate the variable nodes more efficiently by applying feedback decoding at each decoding iteration. Compared with the on-demand BP algorithm, the proposed algorithm has a doubled convergence speed and causes only(More)
Anodic growth of TiO(2) nanotubes has attracted intensive interests recently. However, the as-prepared TiO(2) nanotubes are usually amorphous and they generally need to be crystallized by sintering above 450 °C. Here, we report on a facile method to crystallize amorphous anodized TiO(2) nanotubes at a low temperature. We find that, simply by immersing them(More)
Anatase type nitrogen-fluorine (N-F) codoped TiO(2) nanobelts were prepared by a solvothermal method in which amorphous titania microspheres were used as the precursors. The as-prepared TiO(2) nanobelts are composed of thin narrow nanobelts and it is noted that there are large amount of wormhole-like mesopores on these narrow nanobelts. Photocatalytic(More)
ZnO microspheres sensitized by CuInSe(2) and CuInS(2) nanoparticles, which were synthesized by a solvothermal method and have a size about 20 and 3.5 nm, respectively, were used to a photodegradation of rhodamine B under an irradiation of mercury lamp. Results show that the photocatalytic activities of the ZnO/CuInSe(2) and the ZnO/CuInS(2) are much higher(More)
In order to overcome the disadvantages of traditional Functional Endoscopic Sinus Surgery (FESS), a novel passive endoscopic robot for sinus surgery is designed in this paper. This paper mainly focuses on the design of the prototype of a novel passive endoscopic robot and the lock methods of the passive joints. The design of the robot is divided into two(More)
In this paper, we study the secrecy outage probability (SOP) of an opportunistic relay selection scheme where an optimal relay is selected based on the delayed feedback from the multi-antenna destination. We present a new exact closed-form expression of the SOP, and two kinds of asymptotic form of SOP are further derived to explicitly show secrecy(More)
This paper expounds the working principle of pharmacy robot vision system combining with the mechanical structure of the pharmacy robot. Firstly, the visual system takes the digital images of ampoules and penicillin bottles by the CCD camera. Secondly, we use the functions of OpenCV to extract the ROI of bottle image, filter, segment, and extract the(More)
Endoscopic nasal surgery is with minimal invasiveness for the surgical treatment of chronic sinusitis or other nasal diseases. During the endoscopic surgery, the surgeon uses one hand to hold the endoscope and the other hand to hold the surgical instruments within the nasal cavity. In some cases, the endoscope has to be held by the assistant when the(More)