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Molding a Positive Image
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作者 Ogallo Oluoch 《ChinAfrica》 2012年第7期32-32,共1页
THE increased presence of Chinese companies, a majority of Kenyans and Nigerians believe, is positively impacting their economy.
关键词 Molding a positive image
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Research on Urban Tourism Image Positioning:A Case Study of Dengfeng in Henan Province
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作者 Tian Dajiang Liu Jiaming +1 位作者 Li Shanshi Wang Run 《Chinese Journal of Population,Resources and Environment》 2012年第4期35-38,共4页
Aiming at facilitating the research of urban tourism image positioning,this paper summarizes the domestic and abroad theories on urban tourism image and analyzes its significance for cities.With Dengfeng as an example... Aiming at facilitating the research of urban tourism image positioning,this paper summarizes the domestic and abroad theories on urban tourism image and analyzes its significance for cities.With Dengfeng as an example,its goal is to boost development of Dengfeng tourism,which is an excellent tourism city in China.This paper presents its current urban tourism developing situation,positions its tourism image,concludes the plan of image brand and proposes promotional slogans based on the analysis of Dengfeng tourism local features,its core elements and perceptions of visitors. 展开更多
关键词 urban tourism image positioning Dengfeng methods of image consultation
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Reorientation Research of Xian's City Image
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作者 Yi Zhang Kai Zhang 《International English Education Research》 2014年第10期25-27,共3页
Although over the years, Xi'an City Image has formed clear public perception imagery, but the lack of a distinctive strategic positioning made the image of the city has not yet achieved the unity of understanding. It... Although over the years, Xi'an City Image has formed clear public perception imagery, but the lack of a distinctive strategic positioning made the image of the city has not yet achieved the unity of understanding. It is not conducive to the dissemination of the Xi'an city image and improves core competitiveness. Stand at a different angle on the image of the city of Xi'an positioning the current situation, different leaders, experts and scholars put forward a different position, the positioning feature of the overall showing as abstract and fuzzy. As an attempt, by analyzing the Xi'an government documents and the Xi'an real advantages as well as its competitiveness in the country, this article will re-position the city image of Xi'an. 展开更多
关键词 Xi'an City image City Location City image Positioning
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The Research of Indoor Positioning Based on Visible Light Communication 被引量:10
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作者 WANG Chunyue WANG Lang +3 位作者 CHI Xuefen LIU Shuangxing SHI Wenxiao DENG Jing 《China Communications》 SCIE CSCD 2015年第8期85-92,共8页
The key techniques in indoor positioning based on visible light communication and the state of the art of this research were surveyed. First, the significance of indoor positioning based on visible light communication... The key techniques in indoor positioning based on visible light communication and the state of the art of this research were surveyed. First, the significance of indoor positioning based on visible light communication from two aspects of the limitations of current indoor positioning technology and the advantages of visible light communication was discussed; And then, the main four technology of indoor positioning based on visible light communication were summarized and the triangulation of RSS method and the principle of image positioning were introduced in detail; Next, the performance characteristics of various typical algorithms were compared and analyzed; In the end, several suggestions on future research of indoor positioning based on visible light communication were given. 展开更多
关键词 visible light communication indoor positioning imaging positioning RSS
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Visual positioning of rectangular lead components based on Harris corners and Zernike moments 被引量:4
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作者 王祖进 黄筱调 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2586-2595,共10页
With the increasing necessities for reliable printed circuit board(PCB) product, there has been a considerable demand for high speed and high precision vision positioning system. To locate a rectangular lead component... With the increasing necessities for reliable printed circuit board(PCB) product, there has been a considerable demand for high speed and high precision vision positioning system. To locate a rectangular lead component with high accuracy and reliability, a new visual positioning method was introduced. Considering the limitations of Ghosal sub-pixel edge detection algorithm, an improved algorithm was proposed, in which Harris corner features were used to coarsely detect the edge points and Zernike moments were adopted to accurately detect the edge points. Besides, two formulas were developed to determine the edge intersections whose sub-pixel coordinates were calculated with bilinear interpolation and conjugate gradient method. The last experimental results show that the proposed method can detect the deflection and offset, and the detection errors are less than 0.04° and 0.02 pixels. 展开更多
关键词 visual positioning Harris corners Zernike moments edge detection sub-pixel image registration
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Determining the imaging plane of a retinal capillary layer in adaptive optical imaging 被引量:1
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作者 杨乐宝 胡立发 +4 位作者 李大禹 曹召良 穆全全 马骥 宣丽 《Chinese Physics B》 SCIE EI CAS CSCD 2016年第9期110-116,共7页
Even in the early stage,endocrine metabolism disease may lead to micro aneurysms in retinal capillaries whose diameters are less than 10 μm.However,the fundus cameras used in clinic diagnosis can only obtain images o... Even in the early stage,endocrine metabolism disease may lead to micro aneurysms in retinal capillaries whose diameters are less than 10 μm.However,the fundus cameras used in clinic diagnosis can only obtain images of vessels larger than 20 μm in diameter.The human retina is a thin and multiple layer tissue,and the layer of capillaries less than10 μm in diameter only exists in the inner nuclear layer.The layer thickness of capillaries less than 10 μm in diameter is about 40 μm and the distance range to rod&cone cell surface is tens of micrometers,which varies from person to person.Therefore,determining reasonable capillary layer(CL) position in different human eyes is very difficult.In this paper,we propose a method to determine the position of retinal CL based on the rod&cone cell layer.The public positions of CL are recognized with 15 subjects from 40 to 59 years old,and the imaging planes of CL are calculated by the effective focal length of the human eye.High resolution retinal capillary imaging results obtained from 17 subjects with a liquid crystal adaptive optics system(LCAOS) validate our method.All of the subjects' CLs have public positions from 127 μm to 147 μm from the rod&cone cell layer,which is influenced by the depth of focus. 展开更多
关键词 liquid crystal device adaptive optics capillary layer position retinal imaging
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Magnetoacoustic position imaging for liquid metal in animal interstitial structure
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作者 Xiao-He Zhao Guo-Qiang Liu +1 位作者 Hui Xia Yan-Hong Li 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第5期346-353,共8页
Magnetoacoustic tomography with magnetic induction(MAT-MI),as a new kind of in-vivo imaging method,has potential application value in interstitial fluid research.In this paper,we propose the application of MAT-MI with... Magnetoacoustic tomography with magnetic induction(MAT-MI),as a new kind of in-vivo imaging method,has potential application value in interstitial fluid research.In this paper,we propose the application of MAT-MI with liquid metal serving as a tracer of the interstitial structure to study its fluid behavior,and use it to implement the positional imaging of the spatial distribution of liquid metal.Owing to the particularity of liquid metal magnetoacoustic pressure(MAP)signals,we propose an envelope analysis method to extract the rising edge of the amplitude envelope of the detected waveform as effective position data.And for the first time,we propose the method of superpositing pixel matrix to achieve the position imaging of liquid metal.Finally,the positional imaging of the liquid metal sample embedded in the gel is achieved to have relatively accurate results.This study provides a method of effectively extracting data and implementing the position imaging for liquid metal in the interstitial structure in the frame of MAT-MI. 展开更多
关键词 magnetic acoustic tomography with magnetic induction(MAT-MI) liquid metal interstitial structure position imaging
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Tracking of Labelled Stem Cells Using Molecular MR Imaging in a Mouse Burn Model <i>in Vivo</i>as an Approach to Regenerative Medicine
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作者 Zeba Qadri Valeria Righi +1 位作者 Shasha Li A. Aria Tzika 《Advances in Molecular Imaging》 2021年第1期1-15,共15页
Therapies based on stem cell transplants offer significant potential in the field of regenerative medicine. Monitoring the fate of the transplanted stem cells in a timely manner is considered one of the main limitatio... Therapies based on stem cell transplants offer significant potential in the field of regenerative medicine. Monitoring the fate of the transplanted stem cells in a timely manner is considered one of the main limitations for long-standing success of stem cell transplants. Imaging methods that visualize and track stem cells<i> in vivo</i> non-invasively in real time are helpful towards the development of successful cell transplantation techniques. Novel molecular imaging methods which are non-invasive particularly such as MRI have been of great recent interest. Hence, mouse models which are of clinical relevance have been studied by injecting contrast agents used for labelling cells such as super-paramagnetic iron-oxide (SPIO) nanoparticles for cellular imaging. The MR techniques which can be used to generate positive contrast images have been of much relevance recently for tracking of the labelled cells. Particularly when the off-resonance region in the vicinity of the labeled cells is selectively excited while suppressing the signals from the non-labeled regions by the method of spectral dephasing. Thus, tracking of magnetically labelled cells employing positive contrast<i> in vivo</i> MR imaging methods in a burn mouse model in a non-invasive way has been the scope of this study. The consequences have direct implications for monitoring labeled stem cells at some stage in wound healing. We suggest that our approach can be used in clinical trials in molecular and regenerative medicine. 展开更多
关键词 Burn Wounds Cell Labeling Cell Tracking Cellular Imaging Magnetic Resonance Imaging (MRI) Molecular Imaging positive Contrast Imaging Stem Cells
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Neural Mechanism in Emotion Regulation by Simultaneous Recording of EEG and fMRI
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作者 LUO Jin-hong ZOU Ling +1 位作者 QIAN Nong ZHOU Ren-lai 《Chinese Journal of Biomedical Engineering(English Edition)》 2013年第1期7-14,共8页
The combination of electroencephalogram (EEG) and functional magnetic resonance imaging(fMRI) is a very attractive aim in neuroscience in order to achieve both high temporal and spatial resolution for the non-invasive... The combination of electroencephalogram (EEG) and functional magnetic resonance imaging(fMRI) is a very attractive aim in neuroscience in order to achieve both high temporal and spatial resolution for the non-invasive study of cognitive brain function. In this paper, we record simultaneous EEG-fMRI of the same subject in emotional processing experiment in order to explore the characteristics of different emotional picture processing, and try to find the difference of the subjects' brain hemisphere while viewing different valence emotional pictures. The late positive potential(LPP) is a reliable electrophysiological index of emotional perception in humans. According to the analysis results, the slow-wave LPP and visual cortical blood oxygen level-dependent (BOLD) signals are both modulated by the rated intensity of picture arousal. The amplitude of the LPP correlate significantly with BOLD intensity in visual cortex, amygdala, temporal area, prefrontal and central areas across picture contents. 展开更多
关键词 emotional processing late positive potential functional magnetic resonance imaging blood oxygen level-dependent
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Marine target detection based on Marine-Faster R-CNN for navigation radar plane position indicator images 被引量:2
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作者 Xiaolong CHEN Xiaoqian MU +2 位作者 Jian GUAN Ningbo LIU Wei ZHOU 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2022年第4期630-643,共14页
As a classic deep learning target detection algorithm,Faster R-CNN(region convolutional neural network)has been widely used in high-resolution synthetic aperture radar(SAR)and inverse SAR(ISAR)image detection.However,... As a classic deep learning target detection algorithm,Faster R-CNN(region convolutional neural network)has been widely used in high-resolution synthetic aperture radar(SAR)and inverse SAR(ISAR)image detection.However,for most common low-resolution radar plane position indicator(PPI)images,it is difficult to achieve good performance.In this paper,taking navigation radar PPI images as an example,a marine target detection method based on the Marine-Faster R-CNN algorithm is proposed in the case of complex background(e.g.,sea clutter)and target characteristics.The method performs feature extraction and target recognition on PPI images generated by radar echoes with the convolutional neural network(CNN).First,to improve the accuracy of detecting marine targets and reduce the false alarm rate,Faster R-CNN was optimized as the Marine-Faster R-CNN in five respects:new backbone network,anchor size,dense target detection,data sample balance,and scale normalization.Then,JRC(Japan Radio Co.,Ltd.)navigation radar was used to collect echo data under different conditions to build a marine target dataset.Finally,comparisons with the classic Faster R-CNN method and the constant false alarm rate(CFAR)algorithm proved that the proposed method is more accurate and robust,has stronger generalization ability,and can be applied to the detection of marine targets for navigation radar.Its performance was tested with datasets from different observation conditions(sea states,radar parameters,and different targets). 展开更多
关键词 Marine target detection Navigation radar Plane position indicator(PPI)images Convolutional neural network(CNN) Faster R-CNN(region convolutional neural network)method
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A novel 2-dimensional cosmic ray position detector based on a CsI(Na) pixel array and an ICCD camera
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作者 葛永帅 王志刚 +14 位作者 俞伯祥 谢宇广 章爱武 薛镇 刘颖彪 高龙 牛顺利 蔡啸 方建 孙希磊 吕绮雯 宁飞鹏 周莉 胡涛 吕军光 《Chinese Physics C》 SCIE CAS CSCD 2012年第11期1101-1105,共5页
A novel 2-D cosmic ray position detector has been built and studied. It is integrated from a CsI(Na) crystal pixel array, an optical fiber array, an image intensifier and an ICCD camera. The 2-D positions of one cos... A novel 2-D cosmic ray position detector has been built and studied. It is integrated from a CsI(Na) crystal pixel array, an optical fiber array, an image intensifier and an ICCD camera. The 2-D positions of one cosmic ray track is determined by the location of a fired CsI(Na) pixel. The scintillation light of these 1.0× 1.0 mm CsI(Na) pixels is delivered to the image intensifier through fibers. The light information is recorded in the ICCD camera in the form of images, from which the 2-D positions can be reconstructed. The background noise and cosmic ray images have been studied. The study shows that the cosmic ray detection efficiency can reach up to 11.4%, while the false accept rate is less than 1%. 展开更多
关键词 cosmic ray 2-D position CsI(Na) crystal pixel array optical fiber array image intensifier ICCD camera
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