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Blind Multipath Identification: A Weighted Linear Prediction Approach

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The Journal of China Universities of Posts and Telecommunications 2003年第4期10卷 39-44页

作者： WANG bao-yun,zheng bao-yu(Department of Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, P.R. China) Department of Information Engineering Nanjing University of Posts and Telecommunications Nanjing 210003

Blind channel identification exploits the measurable channel output signaland some prior knowledge of the statistics of the channel input signal. However, in many scenarios,more side information is available, In digital communication systems, the pulse-shaping filter inthe transmitter and the anti-aliasing filter in the receiver are often known to the *** of this prior knowledge can simplify the channel identification problem. In this paper,we pose the multipath identification problem as solving a group of linear equations. While we solvethe linear equations in the least-square meaning, a weight matrix can be introduced to improve theperformance of the estimator. The optimal weight matrix is derived. Compared with the existingLinear Prediction (UP) based multipath identification approach, the proposed approach offers asubstantial performance gain.

关键词： linear prediction blind channel identification multipath channel

Affinity peptide developed by phage display selection for targeting gastric cancer

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World Journal of Gastroenterology 2012年第17期18卷 2053-2060页

作者： Wen-Jie Zhang Yan-Xia Sui Arun Budha Jian-bao zheng Xue-Jun Sun Ying-Chun Hou Thomas D Wang Shao-Ying Lu Department of General Surgery The First Affiliated Hospital of Medical School Xian JiaotongUniversity Xi＇an 710061 Shaanxi Province China The Third Hospital of Chengdu Chengdu610031 Sichuan Province China Shaanxi Normal University Xi＇an 710061Shaanxi Province China Department of Medicine Division of Gastroenterology and Hepatology School of Medicine Universityof Michigan Ann Arbor MI 48109 United States

AIM:To develop an affinity peptide that binds to gastric cancer used for the detection of early gastric ***:A peptide screen was performed by biopanning the PhD-12 phage display library,clearing non-specific binders against tumor-adjacent normal appearing gastric mucosa and obtaining selective binding against freshly harvested gastric cancer *** binding of selected peptides was confirmed by bound phage counts,enzyme-linked immunosorbent assay,competitive inhibition,fluorescence microscopy and semi-quantitative analysis on immunohistochemistry using different types of cancer ***:Approximately 92.8% of the non-specific phage clones were subtracted from the original phage library after two rounds of biopanning against normal-appearing gastric *** the third round of positive screening,the peptide sequence AADNAKTKSFPV(AAD) appeared in 25%(12/48) of the analyzed *** the control peptide,these values were 6.8 ± 2.3,5.1 ± 1.7,3.5 ± 2.1,4.6 ± 1.9 and 1.1 ± 0.5,*** values for AAD peptide were statistically signif icant(P < 0.01) for gastric cancer as compared with other histological classif ications and control ***:A novel peptide is discovered to have a specific binding activity to gastric cancer,and can be used to distinguish neoplastic from normal gastric mucosa,demonstrating the potential for early cancer detection on endoscopy.

关键词： Gastric cancer Peptide Phage library Molecular imaging Early detection Immunohistochemistry Enzyme-linked immunosorbent assay

Target classification with low-resolution radar based on dispersion situations of eigenvalue spectra

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Science China(Information Sciences) 2010年第7期53卷 1446-1460页

作者： CHEN Feng, LIU HongWei, DU Lan & bao zheng National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China National Laboratory of Radar Signal Processing Xidian University Xi’an China

Most low-resolution radar systems, especially ground surveillance radar systems, work at relatively low pulse repeat frequency (PRF) and with short time-on-target (TOT) (duration in scanning). Low PRF leads to Doppler ambiguity and short TOT results in low Doppler resolution, which poses a problem to target classification with low-resolution radar based on the jet engine modulation (JEM) characteristic of radar echo. From the pattern classification viewpoint, we propose a method of using dispersion situations of JEM eigenvalue spectra to categorize aeroplanes into three kinds, namely turbojet aircraft, prop aircraft and helicopter. We analyze the mathematical model of JEM echoes consisting of a series of line spectra and regard them as a sum of several series of harmonious waves. Classification features can be extracted based on the harmonious wave sum model. Some schemes for extracting features from echoes within or between pulses are proposed. Low-dimensional features are extracted to reduce computation burden. Our methods do not compensate for the fuselage echoes and are insensitive to the variation of fuselage Doppler. The feasibility of our methods is demonstrated by simulation experiment.

关键词： jet engine modulation (JEM) low-resolution radar low pulse repeat frequency (PRF) short time-on-target (TOT) target classification

Additive Rank-1 Preservers Between Hermitian Matrix Spaces Over Quaternion Division Algebra

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Chinese Quarterly Journal of Mathematics 2007年第4期22卷 482-491页

作者： HAN Jing-wen zheng bao-dong Department of Mathematics Tianjin University of Finance and Economics Tianjin 300222 China Department of Mathematics Harbin Institute of Technology Harbin 150001 China

Let Q be the quaternion division algebra over real field F, Denote by Hn（Q） the set of all n x n hermitian matrices over Q. We characterize the additive maps from Hn（Q） into Hm（Q） that preserve rank-1 matrices when the rank of the image of In is equal to n. Let QR be the quaternion division algebra over the field of real number R. The additive maps from Hn （QR） into Hm （QR） that preserve rank-1 matrices are also given.

关键词： additive map quaternion division algebra Hermitian matrix rank

Multiwavelets based denoising of SAR Image

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Multiwavelets based denoising of SAR Image

2000年第16届世界计算机大会

作者： Li Wan-She bao zheng Key Lab for RSP Xidian University

＜正＞In this paper,we studies Synthetic Aperture Radar （SAR） images with the multiwavelets transform, presents a new denoising method of multiwavelets to reduce the coherent speckle noise.A lot of experiments approve that this new method not only suppresses the speckle noise effectively,but also preserves as many target characteristics of original images as *** shows that this denoising method offers a very attractive alternative to suppress the coherent speckle noise of the SAR images.

关键词： SAR image Speckle Multiscaling function multiwavelets

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两通道正则正交的主分量滤波器组设计

电子学报 2001年第3期29卷 326-328页

作者：水鹏朗保铮西安电子科技大学雷达信号处理重点实验室西安710071

本文研究了两通道正则正交的主分量滤波器组设计 .给出了正则乘积滤波器的参数表示。

关键词：正则正交设计主分量滤波器组可行解迭代算法

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高分辨圆迹环扫合成孔径雷达成像方法

系统工程与电子技术 2013年第9期35卷 1846-1853页

作者：廖轶包敏邢孟道保铮西安电子科技大学雷达信号处理国家重点实验室陕西西安710071 西安电子科技大学电子工程学院陕西西安710071

圆迹环扫合成孔径雷达(circular trace scanning synthetic aperture radar,CTSSAR)是一种新型合成孔径雷达(synthetic aperture radar,SAR)成像模式,受其圆弧飞行轨迹的影响,直线运动轨迹模型下的成像算法不再适用。针对这一问题,提出... 详细信息

圆迹环扫合成孔径雷达(circular trace scanning synthetic aperture radar,CTSSAR)是一种新型合成孔径雷达(synthetic aperture radar,SAR)成像模式,受其圆弧飞行轨迹的影响,直线运动轨迹模型下的成像算法不再适用。针对这一问题,提出了一种新的CTSSAR成像方法。该方法首先在误差允许的范围内对其圆弧运动轨迹下的斜距方程作四阶近似,再求解方程得到驻相点的精确解析解,获得信号的二维频谱,并以此推导了相应的成像算法,补偿了不同距离处的目标的相位,实现高分辨率成像。在整个的推导过程中只做了一次合理的高阶近似,因此获得的二维频谱具有较高的精度。同时对于实际中可能遇到的运动误差问题,给出了一种解决思路。最后,点目标的仿真对比结果验证了成像算法的有效性与运动补偿方案的可行性。

关键词：圆迹环扫合成孔径雷达二维频谱运动补偿卡尔丹方程

Effects of baicalin in CD4 + CD29 + T cell subsets of ulcerative colitis patients

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World Journal of Gastroenterology 2014年第41期20卷 15299-15309页

作者： Feng-Yan Yu Shao-Gang Huang Hai-Yan Zhang Hua Ye Hong-Gang Chi Ying Zou Ru-Xi Lv Xue-bao zheng Traditional Chinese Medicine Institute Guangdong Medical College Guangdong Provincial Hospital of University City Branch Traditional Chinese Medicine Institute Guangdong Medical College Guangdong Key Laboratory of Natural Medicine Research and Development School of Traditional Chinese Medicine of Southern Medical College

AIM: To evaluate the role of baicalin in ulcerative colitis (UC) with regard to the CD4+CD29+ T helper cell, its surface markers and serum inflammatory cytokines.

关键词： Ulcerative colitis Baicalin CD4+CD29+ Cytokines Nuclear factor-κ B

Comparison of 5-hydroxytryptophan signaling pathway characteristics in diarrhea-predominant irritable bowel syndrome and ulcerative colitis

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World Journal of Gastroenterology 2016年第12期22卷 3451-3459页

作者： Feng-Yan Yu Shao-Gang Huang Hai-Yan Zhang Hua Ye Hong-Gang Chi Ying Zou Ru-Xi Lv Xue-bao zheng Traditional Chinese Medicine Institute Guangdong Medical University Dongguan 524023 Guangdong Province China University City Branch Hospital of Guangdong Provincial Hospital of Traditional Chinese Medicine Guangzhou 510006 Guangdong Province China Guangdong Key Laboratory of Natural Medicine Research and Development Guangdong Medical College Zhanjiang 524023 Guangdong Province China

AIM: To study differences in the visceral sensitivity of the colonic mucosa between patients with diarrheapredominant irritable bowel syndrome(IBS-D) and those with ulcerative colitis(UC) in remission and to relate these differences with changes in the 5-hydroxytryptophan(5-HT) signaling pathway. METHODS: Gastrointestinal symptoms were used to determine the clinical symptom scores and rectal visceral sensitivity of patients with IBS-D and patients with UC in remission. Blood levels of 5-HT and5-hydroxyindoleacetic acid(5-HIAA) were measured using an HPLC-electrochemical detection system. The levels of 5-HT 3 receptor(3R), 4R, and 7R m RNAs in colonic biopsy samples were detected using reverse transcription-polymerase chain reaction. The protein expression of TPH1 was analyzed by Western blot and ***: Abdominal pain or discomfort, stool frequency, and the scores of these symptoms in combination with gastrointestinal symptoms were higher in the IBS-D and UC groups than in the control groups. However, no significant differences were observed between the IBS-D and UC remission groups. With respect to rectal visceral sensitivity, the UC remission and IBS-D groups showed a decrease in the initial perception threshold, defecating threshold and pain threshold. However, these groups exhibited significantly increased anorectal relaxation pressure. Tests examining the main indicators of the 5-HT signaling pathway showed that the plasma 5-HT levels, 5-HIAA concentrations, TPH1 expression in the colonic mucosa, and 5-HT3 R and 5-HT5 R expression were increased in both the IBS-D and the UC remission groups; no increases were observed with respect to 5-HT7 R ***: The IBS-D and UC groups showed similar clinical symptom scores, visceral sensitivity, and levels of serotonin signaling pathway indicators in the plasma and colonic mucosa. However, the pain threshold and 5-HT7 R expression in the colonic mucosa were significantly different betwe

关键词： Stomach type diarrhea Diarrhea-predominant irritable bowel syndrome Ulcerative colitis in remission 5-Hydroxytryptophan