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Wang M.,Hebei University of Technology | Wang M.,Tianjin Key Laboratory of Electronic Materials and Devices | Hao N.,Hebei University of Technology | Wang X.,Hebei University of Technology
Guangxue Xuebao/Acta Optica Sinica | Year: 2014

Two-dimensional binary barcode are generated by pulse coupled neural network (PCNN) combined with position information of firing pixel can be used for mirror symmetry traffic sign images recognizing, in order to explore its character of anti-interference, salt and pepper noise is induced, anti-interference characters before and after pre-processing are tested at different division levels in RGB color space, respectively. Experiments are carried out based on 117 traffic signs images, including 45 yellow forbidden signs, 43 red warning signs, and 29 blue instruction signs in GB5768-1999. Experimental results show that two-dimensional binary barcode can distinguish mirror symmetry traffic signs and has better anti-interference characters than one-dimensional binary barcode. Highest matching rate is 97% when three channels in RGB color space are processed respectively under the influence of 1% salt and pepper noise. ©, 2014, Guangxue Xuebao/Acta Optica Sinica. All right reserved. Source


Jiao H.,Hebei University of Technology | Jiao H.,Tianjin Key Laboratory of Electronic Materials and Devices | Yuling L.,Hebei University of Technology | Yuling L.,Tianjin Key Laboratory of Electronic Materials and Devices | And 5 more authors.
Journal of Semiconductors | Year: 2015

TSV (through silicon via) is an emerging technology, which can realize micromation compared with the conventional packaging and extend Moore's law. Chemical mechanical polishing (CMP) is one of the most important steps in the process of TSV manufacture, and it is an enabling technology to extend Moore's law in the past two decades. Low pressure, low abrasive and low pH value are the main requirements for copper interconnection. In this paper, the effect of different kinds of TSV slurry with FA/O II or FA/O IV type chelating agent on CMP are studied. All kinds of slurry used in this study are alkaline with no added inhibitors. From the experiment results, it can be seen that the copper removal rate and surface roughness achieved by using the FA/O IV type chelating agent with a low pH value is superior to using the FA/O II type chelating agent. © 2015 Chinese Institute of Electronics. Source


Hong J.,Hebei University of Technology | Hong J.,Tianjin Key Laboratory of Electronic Materials and Devices | Liu Y.,Hebei University of Technology | Liu Y.,Tianjin Key Laboratory of Electronic Materials and Devices | And 5 more authors.
Journal of Semiconductors | Year: 2015

The effect of a novel alkaline TSV (through-silicon-via) slurry with guanidine hydrochloride (GH) on CMP (chemical mechanical polishing) was investigated. The novel alkaline TSV slurry was free of any inhibitors. During the polishing process, the guanidine hydrochloride serves as an effective surface-complexing agent for TSV CMP applications, the removal rate of barrier (Ti) can be chemically controlled through tuned selectivity with respect to the removal rate of copper and dielectric, which is helpful to modifying the dishing and gaining an excellent topography performance in TSV manufacturing. In this paper, we mainly studied the working mechanism of the components of slurry and the skillful application guanidine hydrochloride in the TSV slurry. © 2015 Chinese Institute of Electronics. Source


Hou J.,Hebei University of Technology | Hou J.,Tianjin Key Laboratory of Electronic Materials and Devices | Xia K.,Hebei University of Technology | Xia K.,Tianjin Key Laboratory of Electronic Materials and Devices | And 4 more authors.
Journal of Information and Computational Science | Year: 2015

The point at issue is to cure the problem of low calculation speed, lower recognition accuracy in the surface defects detection algorithm for strip steel. A novel surface defects detection method of strip steel based on Semi-definite Programming SVM (SDP-SVM) algorithm which is going to be proposed. The whole process of the defects detection algorithm includes extracting stripping steel image, ascertaining of defect image, preprocessing defect image, extracting defect features, classifying defects by SDP-SVM and confirming defect types, etc. Finally, simulate various defect images in the process of actual production which is based on the defects detection algorithm proposed in this manuscript. The results show that the algorithm has greatly improved compared to the traditional SVM algorithm both in accuracy and speed. The algorithm has a widespread application prospects with a more comprehensive approach, precision in application and practical utilization. Copyright © 2015 Binary Information Press. Source


Lu J.,Hebei University of Technology | Lu J.,Tianjin Key Laboratory of Electronic Materials and Devices | Hu Y.,Hebei University of Technology | Hu Y.,Tianjin Key Laboratory of Electronic Materials and Devices | And 6 more authors.
Zhongguo Jiguang/Chinese Journal of Lasers | Year: 2015

The all-optical wavelength conversion (AOWC) based on parallel dual-pump for polarization multiplexing 16 quadrature amplitude modulation arthogonal frequency division multiplexing (16QAM-OFDM) signal in semiconductor optical amplifier (SOA) is theoretically analyzed and simulated. The theoretical analysis and simulation results show that the polarization multiplexing 16QAM-OFDM signal can be received without crosstalk after AOWC by direct-detection, besides that several conditions which affect the AOWC conversion efficiency in this system are analyzed, such as frequency spacing of parallel pumps, SOA injection current, average power and the azimuth of optical signal. This simulation results also validate the correctness of theoretical analysis at the same time. ©, 2015, Science Press. All right reserved. Source

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