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Fast two-dimensional weighted least squares techniques for the design of two-dimensional finite impulse response filters

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控制理论与应用（英文版） 2013年第2期11卷 180-185页

作者： Ruijie ZHAO xiaoping lai School of Mechanical Electrical and Information Engineering Shandong University at Weihai Institute of Information and Control Hangzhou Dianzi University

This paper focuses on the design of two-dimensional （2D） quadrantally symmetric finite impulse response （FIR） filters, and presents three very efficient algorithms for the weighted least squares （WLS） design with a weight matrix that assigns four different weights to four different frequency bands. The first algorithm seeks for iterative solutions to the matrix equation describing the optimality condition of the design problem. The second algorithm aims at the limit solution of the solution sequence to the first algorithm, analytically obtained by using matrix diagonalization techniques. The third algorithm belongs to the category of iterative reweighting techniques. It uses the second algorithm as its iteration core, and aims at reducing the maximum magnitude error of the filter by iteratively adjusting the four entry values of the weight matrix. Design examples are provided to demonstrate the performance of the proposed algorithms.

关键词： 2D FIR filters Diagonalization Quadrantal symmetry WLS design

Antioxidative and hepatoprotective activities of the ethyl acetate fraction separated from the fruit of Livistona chinensis

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Journal of Traditional Chinese Medicine 2018年第4期38卷 523-534页

作者： Wang Chunli Zhang Liang Wu Meimei Jing Yuntiao lai xiaoping Huang Song Zhang Xiaojun School of Chinese Materia Medica Guangzhou University of Chinese Medicine

OBJECTIVE:To examine the antioxidative and hepatoprotective activities of the effective fraction separated from the fruit of Livistona chinensis(FLC)and to explore the possible ***:The antioxidative activities of the various fractions separated from FLC were analyzed by in vitro DPPH(1,1-diphenyl-2-picrylhydrazyl radical 2,2-diphenyl-1-(2,4,6-trinitrophenyl) hydrazyl,DPPH) radical and superoxide anion free radical(O^(2-)) scavenging *** potential hepatoprotective effects of the ethyl acetate fraction separated from FLC(EFLC) were examined in LO_2 cells and ***_2 cells were incubated with EFLC and exposed to H_2O_2-induced oxidative ***/C mice were orally administered EFLC for consecutive7 d,and fulminant hepatitis was induced by cauda vein injection of Con A on day ***:EFLC showed prominent antioxidative effects in DPPH-and O^(2-) scavenging *** pretreatment effectively protected LO_2 cells from H_2O_2-induced oxidative stress by decreasing apoptosis and raising the levels of antioxidant ***,EFLC protected mice against Con A-induced fulminant hepatitis by markedly reducing the serum levels of alanine transaminase and aspartate aminotransferase,attenuating histological damage of the mouse liver,and elevating the levels of glutathione peroxidase and total superoxide dismutase,while decreasing the contents of methane dicarboxylic aldehyde,tumor necrosis factor-α,and interleukin-1β in the mouse ***,EFLC pretreatment downregulated the protein expression of B-cell lymphoma 2(Bcl-2) associated X protein,caspase-3,caspase-8,Fas,and Fas L,while upregulating the protein expression of Bcl-2 in the mouse ***:These findings revealed that EFLC effectively protected against in vivo and in vitro liver injury,and the mechanism is closely associated with its antioxidative and anti-apoptotic properties.

关键词： Hepatitis Toxins Antioxidants Livisto-na chinensis Hepatoprotection

Intramedullary schwannoma of the upper cervical spinal cord:a case study of identification in pathologic autopsy

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Forensic Sciences Research 2017年第1期2卷 46-49页

作者： Xianxian Li Guangtao Xu Ruibing Su Junyao Lv xiaoping lai Xiaojun Yu Medicolegal Department Shantou University Medical CollegeShantouChina Department of Pathology Jiaxing University Medical CollegeJiaxingChina Department of Forensic Medicine Guangdong Medical UniversityDongguanChina

Intramedullary schwannoma of the upper cervical spinal cord is rarely reported in forensic *** herein report a case involving a patient who died of compression from an intramedullary schwannoma in the upper cervical spinal cord.A 30-year-old man initially presented with a five-day history of pain in the left chest that progressed to weakening in the left *** the patient was treated with analgesic poultices,he developed inspiratory dyspnoea and died while working the next day without having undergone any medical imaging examination or surgical *** and histopathological examinations revealed an intramedullary schwannoma in the left cervical spinal cord(C_(3)-C_(5))underneath the spinal nerve *** cause of death might have been asphyxia secondary to the tumour,which interfered with the nerve function in the respiratory *** finding suggests that an autopsy is essential for pathologists and medicolegists to comprehensively undertake their due obligation to obtain“the first evidence”,especially when there is a lack of directly related *** part of the central nervous system,the spinal cord could be systematically included in a routine pathological autopsy in some cases.

关键词： Forensic science forensic pathology asphyxia spinal cord intramedullary schwannoma

An OPRemez Approach to the Design of FIR Digital Filters

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An OPRemez Approach to the Design of FIR Digital Filters

Molecular epidemiology demonstrates that imported and local strains circulated during the 2014 dengue outbreak in Guangzhou, China

2000年第16届世界计算机大会

作者： lai xiaoping Control Engineering Department Shandong University at Weihai

＜正＞This paper considers the minimax design problem of FIR digital filters and proposes a new design *** proposed algorithm is a Remez exchange based one in which the coefficients of the filter are evaluated with an orthogonalized projection *** estimated coefficients are proved to be convergent to the true values for a given set of extremal *** examples show that the proposed OPRemez algorithm can be used to design filters with very high filter length,and that the algorithm takes fewer exchanges than the standard Remez exchange algorithm.

关键词： FIR filters Remez exchange orthogonalized projection

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Virologica Sinica 2017年第1期32卷 63-72页

作者： Geng Li Pan Pan Qiuyan He Xiujuan Kong Kailang Wu Wei Zhang Yuntao Liu Huiting Huang Jianbo Liu Zhongde Zhang De Wu xiaoping lai Xiaohong Liu Jianguo Wu School of Chinese Meterla Medica Guangzhou University of Chinese Medicine Guangzhou 510006China State Key Laboratory of Virology College of Life Sciences Wuhan University Wuhan 430072 China The First Affiliated Hospital of Guangzhou University of Chinese Medicine Guangzhou 510120 China Guangdong Province Traditional Chinese Medical Hospital Guangzhou 510120 China Guangdong Provincial Center for Disease Control and Prevention Guangzhou 511430 China

The dengue virus （DENV） is a vital global public health issue. The 2014 dengue epidemic in Guangzhou, China, caused approximately 40,000 cases of infection and five deaths. We carried out a comprehensive investigation aimed at identifying the transmission sources in this dengue epidemic. To analyze the phylogenetics of the 2014 dengue strains, the envelope （E） gene sequences from 17 viral strains isolated from 168 dengue patient serum samples were sequenced and a phylogenetic tree was reconstructed. All 17 strains were serotype I strains, including 8 genotype I and 9 genotype V strains. Additionally, 6 genotype I strains that were probably introduced to China from Thailand before 2009 were widely transmitted in the 2013 and 2014 epidemics, and they continued to circulate until 2015, with one affinis strain being found in Singapore. The other 2 genotype I strains were introduced from the Malaya Peninsula in 2014. The transmission source of the 9 genotype V strains was from Malaysia in 2014. DENVs of different serotypes and genotypes co-circulated in the 2014 dengue outbreak in Guangzhou. Moreover, not only had DENV been imported to Guangzhou, but it had also been gradually exported, as the viruses exhibited an enzootic transmission cycle in Guangzhou.

关键词： dengue virus (DENV) phylogenetic analysis envelope (E) gene enzootic transmission cycle

基于Logistic回归的在线广告并行运算模型

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计算机工程 2015年第8期41卷 42-45页

作者：赖小平广东理工学院信息工程系广东肇庆526100

在线广告是各大互联网公司的主要盈利模式之一,目的是在满足用户的实时需求时,通过竞价和预测用户点击率等方式实现利润最大化。为实现上述目标,提出一种改进的在线广告并行运算模型。应用Logistic回归模型对用户的点击率进行建模,该模... 详细信息

在线广告是各大互联网公司的主要盈利模式之一,目的是在满足用户的实时需求时,通过竞价和预测用户点击率等方式实现利润最大化。为实现上述目标,提出一种改进的在线广告并行运算模型。应用Logistic回归模型对用户的点击率进行建模,该模型既包含关于长期历史信息的一次模型和二次模型因子,又包含短期的上下文因子。通过贝叶斯后验分布理论对参数计算进行推导,根据Thompson采样和预先计算2种方法改进模型计算效率。实验结果表明,该模型不仅具有较高的预测准确性,而且提高了算法的收敛速度与运行效率。

关键词：计算广告响应预测机器学习 Logistic回归点击率

1D-Convolutional Neural Network based Vibration Signal Fault Detection

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1D-Convolutional Neural Network based Vibration Signal Fault...

第32届中国过程控制会议(CPCC2021)

作者： Jixiang Wei Peng Lin Shicheng Yu Jiuwen Cao xiaoping lai Machine Learning and I-health International Cooperation Base of Zhejiang Province and with the Artificial Intelligence InstituteHangzhou Dianzi University

Convolutional neural networks(CNNs) are very good at picking up on patterns in the input image and have become widely used in computer *** the help of the excellent structured data processing ability of CNNs,a one-dimensional convolutional neural network(1 D-CNN) is constructed for fault detection and classification of time series data from vibration system of rotating machinery under various operating ***,a compact 1 D-CNN model with a wide convolution kernel is proposed in the first layer,and Dropout technology is used in the convolution layer to simulate training interference to enhance the anti-noise ***,a double 1 D-CNN model is proposed for cross-condition fault ***,the effectiveness of the method is verified by simulation of compressor instability data.

关键词： Fault detection One-Dimensional Convolutional Neural Network Domain adaptation Rotating machinery

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混合智能优化算法的SAR图像特征选择

遥感学报 2016年第1期20卷 73-79页

作者：张琴谷雨徐英赖晓平杭州电子科技大学通信信息传输与融合技术国防重点学科实验室浙江杭州310018 杭州电子科技大学生命信息与仪器工程学院浙江杭州310018

为提高SAR图像自动目标识别的准确率及实时性,提出了一种基于混合智能优化的SAR图像特征选择算法。首先,采用分形特征对SAR图像进行增强,基于分割后的图像提出了一种基于图像矩的方位角估计方法。然后基于未校正和校正后的图像分别提取Z... 详细信息

为提高SAR图像自动目标识别的准确率及实时性,提出了一种基于混合智能优化的SAR图像特征选择算法。首先,采用分形特征对SAR图像进行增强,基于分割后的图像提出了一种基于图像矩的方位角估计方法。然后基于未校正和校正后的图像分别提取Zernike矩、Gabor小波系数和灰度共生矩阵构成候选特征集合,使用遗传算法结合二值粒子群的混合优化算法实现SAR图像特征选择。最后,采用MSTAR数据库验证本文算法的有效性。实验结果表明,优化后的特征集合具有一定泛化能力,一方面提高了SAR目标识别的准确率,另一方面减小了SAR图像目标识别的时间。

关键词： SAR图像特征选择混合智能优化算法分形特征 Zernike矩

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动物线粒体遗传系统理论与应用研究进展

生物技术通报 2010年第3期26卷 25-30页

作者：陈念赖小平广州中医药大学中药学院广州510006

随着线粒体与人类疾病之间关系研究的不断深入,线粒体DNA及其编码的13个多肽的功能和进化引起了众多研究者的关注。作为有氧呼吸的后生动物主要的产能系统——线粒体电子传递系统(ETS)由线粒体和核基因组共同编码,自然选择被认为偏爱那... 详细信息

随着线粒体与人类疾病之间关系研究的不断深入,线粒体DNA及其编码的13个多肽的功能和进化引起了众多研究者的关注。作为有氧呼吸的后生动物主要的产能系统——线粒体电子传递系统(ETS)由线粒体和核基因组共同编码,自然选择被认为偏爱那些增强ETS功能的突变,此类突变可发生在线粒体或核编码的ETS蛋白中并引起积极的基因组间的相互作用,即"共适应"。线粒体DNA进化通常被认为遵循一种稳定的突变速率平衡中性模型,但有证据表明该假设可能并不可靠。对线粒体遗传系统研究的最新进展进行了综述,这对科学和合理地使用线粒体DNA分析技术具重要意义。

关键词：法医学线粒体DNA 多态性进化