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Hierarchical Visual Attention Model for Saliency Detection Inspired by Avian Visual Pathways

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IEEE/CAA Journal of Automatica Sinica 2019年第2期6卷 540-552页

作者： xiaohua wang Haibin Duan the State Key Laboratory of Virtual Reality Technology and Systems School of Automation Science and Electrical Engineering Beihang University the State Key Laboratory of Virtual Reality Technology and Systems School of Automation Science and Electrical EngineeringBeihang University the Peng Cheng Laboratory

Visual attention is a mechanism that enables the visual system to detect potentially important objects in complex environment. Most computational visual attention models are designed with inspirations from mammalian visual ***, electrophysiological and behavioral evidences indicate that avian species are animals with high visual capability that can process complex information accurately in real time. Therefore,the visual system of the avian species, especially the nuclei related to the visual attention mechanism, are investigated in this paper. Afterwards, a hierarchical visual attention model is proposed for saliency detection. The optic tectum neuron responses are computed and the self-information is used to compute primary saliency maps in the first hierarchy. The "winner-takeall" network in the tecto-isthmal projection is simulated and final saliency maps are estimated with the regularized random walks ranking in the second hierarchy. Comparison results verify that the proposed model, which can define the focus of attention accurately, outperforms several state-of-the-art *** study provides insights into the relationship between the visual attention mechanism and the avian visual pathways. The computational visual attention model may reveal the underlying neural mechanism of the nuclei for biological visual attention.

关键词： Avian visual pathways bio-inspired saliency detection visual attention

Biologically adaptive robust mean shift algorithm with Cauchy predator-prey BBO and space variant resolution for unmanned helicopter formation

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Science China(Information Sciences) 2014年第11期57卷 195-207页

作者： wang xiaohua DUAN HaiBin State Key Laboratory of Virtual Reality Technology and Systems Beihang University

Visual tracking technology can provide measurement information for unmanned helicopter formation and thus, more attention is being paid to this research area. We propose a novel mean shift(MS) algorithm that is both adaptive and robust for unmanned helicopter formation and apply it to the leading unmanned helicopter tracking. The movement of an unmanned helicopter is very flexible and changeable, which makes the tracking there of more difficulty than for common targets. In creating an algorithm that can adapt to the acceleration of the unmanned helicopter and estimates both the scale and orientation of the movement changes, we combine the traditional MS with the bio-inspired Cauchy predator-prey biogeography-based optimization(CPPBBO)evolutionary algorithm, and also the space variant resolution(SVR) mechanism of the human visual system(MS-CPPBBO-SVR). To demonstrate the effectiveness and robustness of the proposed method and justify the importance of the CPPBBO algorithm and SVR mechanism at the same time, a series of comparative experiments were carried out. The experimental results of the proposed MS-CPPBBO-SVR method are compared with other competitive tracking methods, such as MS, MS with SVR(MS-SVR), MS-SVR with several other optimization algorithms, and the robust particle filter algorithm. The experimental results demonstrate that our proposed tracking approach, MS-CPPBBO-SVR, is more adaptive, robust and efficient in target tracking than the other methods.

关键词： unmanned helicopter formation tracking mean shift biogeography-based optimization(BBO) predator-prey space variant resolution(SVR)

Image retrieval based on color features integrated with anisotropic directionality

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Journal of Systems Engineering and Electronics 2010年第1期21卷 127-133页

作者： Jing Bai xiaohua wang Licheng Jiao Key Laboratory of Intelligent Perception and Image Understanding of Ministry of Education of China Institute of Intelligent Information Processing Xidian University Xi'an 710071 P. R. China

A novel image retrieval approach based on color features and anisotropic directional information is proposed for content based image retrieval systems （CBIR）. The color feature is described by the color histogram （CH）, which is translation and rotation invariant. However, the CH does not contain spatial information which is very important for the image retrieval. To overcome this shortcoming, the subband energy of the lifting directionlet transform （L-DT） is proposed to describe the directional information, in which L-DT is characterized by multi-direction and anisotropic basis functions compared with the wavelet transform. A global similarity measure is designed to implement the fusion of both color feature and anisotropic directionality for the retrieval process. The retrieval experiments using a set of COREL images demonstrate that the higher query precision and better visual effect can be achieved.

关键词： image retrieval color histogram directionlet transform anisotropic similarity.

Design of twodimensional digital filters using neural networks

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Journal of Systems Engineering and Electronics 2005年第4期16卷 767-771页

A new approach for the design of two-dimensional （2-D） linear phase FIR digital filters based on a new neural networks algorithm （NNA） is provided. A compact expression for the transfer function of a 2-D linear phase FIR filter is derived based on its frequency response characteristic, and the NNA, based on minimizing the square-error in the frequency-domain, is established according to the compact expression. To illustrate the stability of the NNA, the convergence theorem is presented and proved. Design examples are also given, and the results show that the ripple is considerably small in passband and stopband, and the NNA-based method is of powerful stability and requires quite little amount of computations.

关键词： 2-D linear-phase FIR digital filters neural network convergence theorem stability.

Inactivated properties of activated carbon-supported TiO_2 nanoparticles for bacteria and kinetic study

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Journal of Environmental Sciences 2008年第12期20卷 1527-1533页

作者： LI Youji MA Mingyuan wang Xiaohu wang xiaohua College of Chemistry and Chemical Engineering Jishou University Hunan 416000 China

The activated carbon-supported TiO2 nanoparticles(TiO2/AC)were prepared by a properly controlled sol-gel *** effects of activated carbons(AC)support on inactivated properties of TiO2 nanoparticles were evaluated by photocatalytic inactivation experiments of Escherichia *** key factors affecting the inactivation effciency were investigated,including electric power of lamp, temperature,and pH *** results show that the TiO2/AC composites have high inactivation properties of *** in compari...

关键词： inactivation activated carbon-supported TiO2 sol-gel method bacteria

Using the resource-environment-economy coordination degree model to guide China's national blue bay remediation action plan in Qingdao

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Journal of Oceanology and Limnology 2020年第6期38卷 1846-1857页

作者： SUI Xiaotong wang xiaohua ZHAO Lingdi School of Economics Ocean University of ChinaQingdao 266000China Marine Development Studies Institute of OUC Key Research Institute of Humanities and Social Sciences at UniversitiesMinistry of EducationQingdao 266000China Sino-Australian Research Centre for Coastal Management UNSW CanberraBC 2610Australia

The China National Blue Bay Remediation Action Plan(NBBRAP)is a crucial step towards achieving the overall goal of building a maritime power and a beautiful *** paper presents the resource-environment-economy(REE)composite system from the three-dimensional perspective of ***,through the coordination degree model of the composite system based on the order degree of subsystems,empirical analysis of the coordination degree of the REE composite system in a typical coastal city Qingdao from 2005 to 2016 was carried *** indicate that the degree of coordination and interactive coordination of the REE composite system in Qingdao were in a low-quality ***'s economy development depended largely on the expense of over-exploitation of resources and environmental degradation in *** policy implementation was less persistent in 2009-2010 and *** immediate stimulating effect was significant,making the coordination degree of the REE composite system fluctuate in a volatile *** of the coordination degree of the REE composite system has practical guiding significance for the successful implementation attainment of the NBBRAP target in Qingdao and is conducive to deepening the learning and promotion of this plan in other coastal cities.

关键词： China National Blue Bay Remediation Action Plan resource-environment-economy coordination

Effect of allogeneic umbilical cord mesenchymal stem cell transplantation in a rat model of hepatic cirrhosis

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Journal of Traditional Chinese Medicine 2015年第1期35卷 63-68页

作者： Yang Lihua wang Yun wang xiaohua Liu Yanqing Institution of Traditional Chinese Medicine and Western Medicine Nanjing University of Chinese Medicine Institute of Digestive Endoscopy & Medical Center for Digestive Diseases the Second Affiliated Hospital of Nanjing Medical University

OBJECTIVE：To determine the effects of human umbilical cord mesenchymal stem cell （UCMSC） transplantation, alone or in combination with tanshi- none IIA （Tan ⅡA） on hepatic cirrhosis in rats. METHODS： A rat model of cirrhosis was established. Rats were divided into control, UCMSC, and UCSMC plus Tan IIA groups. Rats in the UCMSC group were injected via the tail vein with 0.2 mL Dil-labeled UCMSC suspension. Intraperitoneal Tan ⅡA injections （20 mg/kg） were started on the day of UCMSC transplantation in the UCMSC plus Tan IIA group, and continued for 7 consecutive days thereafter. Rats were sacrificed 1 day, 3 days, 1 month, and 3 months after transplantation and the numbers of Dil-labeled UCMSCs colonizing the liver were determined. Albumin （ALB） and alanine aminotransferase （ALT） levels were measured in venous blood, and mRNA and protein expression lev- els of human ALB and cytokeratin （CK）-18 in liver tissues were determined by reverse transcrip- tion-polymerase chain reaction and western blotting, ***： Serum ALT levels were significantly lower and serum ALB levels significantly higher in rats in the UCMSC group compared with the control group （P 〈 0.05）. Hepatic CK-18 and ALB mRNA and protein expression levels increased after transplantation, and were significantly higher in the UCMSC plus Tan ⅡA group compared with the UCMSC group （P 〈 0.05）.CONCLUSION： Human UCMSCs transplanted into rats with liver cirrhosis can grow and differentiate into hepatocyte-like cells resulting in improved liver function in vivo. Tan ⅡA further influenced transplantation outcomes.

关键词： Liver cirrhosis Umbilical cord Mesenchymal stem cells Tanshinone Transplantation

Efficient hybrid method for time reversal superresolution imaging

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Journal of Systems Engineering and Electronics 2015年第1期26卷 32-37页

作者： xiaohua wang Wei Gao Bingzhong wang School of Physical Electronics University of Electronic Science and Technology of China

An efficient hybrid time reversal（TR） imaging method based on signal subspace and noise subspace is proposed for electromagnetic superresolution detecting and imaging. First, the locations of targets are estimated by the transmitting-mode decomposition of the TR operator（DORT） method employing the signal subspace. Then, the TR multiple signal classification（TR-MUSIC）method employing the noise subspace is used in the estimated target area to get the superresolution imaging of targets. Two examples with homogeneous and inhomogeneous background mediums are considered, respectively. The results show that the proposed hybrid method has advantages in CPU time and memory cost because of the combination of rough and fine imaging.

关键词： time reversal(TR) decomposition of the time-reversal operator(DORT) method multiple signal classification(MUSIC) method superresolution imaging

Analgesic effect of acupuncture at Hegu (LI 4) on transvaginal oocyte retrieval with ultrasonography

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Journal of Traditional Chinese Medicine 2013年第3期33卷 294-297页

作者： Jianwei Zhang xiaohua wang Ruisha Lü Reproduction and Heredity Center Combining Traditional Chinese Medicine with Western Medicine in Hospital Affiliated to Shandong University of Traditional Chinese Medicine Shandong University of Traditional Chinese Medicine Master Degree Candidate of 2006 Grade in Shandong University of Traditional Chinese Medicine

OBJECTIVE: To observe the analgesic effect of acupuncture at Hegu (LI 4) in vitro fertilization-embryo transfer (IVF-ET) transvaginal oocyte retrieval using ultrasonography and explore its mechanism. METHODS: Ninety patients undergoing IVF-EF oocyte retrieval were randomly divided into three groups: an acupuncture group with needles inserted into bilateral Hegu (LI 4) points, a placebo group given placebo needles, and a control group with routine oocyte retrieval. Each group had an indometacin enema 30 min before the operation. We compared the pain-rated index (PRI), visual analogy scale (VAS), and present pain intensity (PPI) immediately after operation and 1 h after operation. We also determined the neuropeptide Y (NPY) level of the follicular fluid. RESULTS: PRI, VAS, and PPI after operation and 1 hafter operation in the acupuncture group were significantly lower than those in the control group (P0.05) was observed in PRI,VAS, and PPI after operation and 1 h after operation between the placebo group and the control *** NPY level of the follicular fluid in the acupuncture group was significantly higher than that in the control group (P0.05) was observed in the NPY level of the follicular fluid between the placebo group and the control group. CONCLUSION: The analgesic effect of acupuncture at Hegu in transvaginal oocyte retrieval using ultrasonography may be related to the increase in the NPY level of the follicular fluid.

关键词： Acupuncture Hegu (LI 4) Analgesics,non-narcotic Oocyte retrieval Neuropeptide Y