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适于航空面阵CCD相机的H.264编码帧内预测算法

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光电子．激光 2014年第8期25卷 1558-1564页

作者：张然峰郝贤鹏吕增明韩双丽李进中国科学院长春光学精密机械与物理研究所吉林长春130033 中国科学院研究生院北京100039

为了提高H.264中帧内预测压缩编码效率,提出一种适于航空面阵CCD相机应用的H.264的新的帧内预测模式。其基本思想为：一个块中的每个像素预测值使用周围像素和权重采用一个N阶线性预测器计算得到,而权重值是由重构像素中与待编码像素的... 详细信息

为了提高H.264中帧内预测压缩编码效率,提出一种适于航空面阵CCD相机应用的H.264的新的帧内预测模式。其基本思想为：一个块中的每个像素预测值使用周围像素和权重采用一个N阶线性预测器计算得到,而权重值是由重构像素中与待编码像素的邻近块计算得到,可参考的邻近块使用l1范数评估。而权重值并不需要传输到解码器中而耗用大量时间。在H.264参考软件JM17.6上的实验结果表明,本文提出的帧内预测算法具有很好的率失真（RD）性能,与标准H.264帧内预测算法比较,对于图像而言,PSNR增加了0.57~0.17dB,比特率减少了9.71~3.94%;对于CIF格式视频序列,PSNR增加了0.05~0.14dB,比特率减少了1.23~1.52%;对于720p50格式视频序列,PSNR增加了0.01~0.05dB,比特率减少了0.25~0.47%。因此,本文算法非常适于航空面阵CCD相机的应用。

关键词：面帧CCD相机视频压缩 H 264压缩最小平方预测

采用非采样Contourlet变换与区域分类的红外和可见光图像融合

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光学精密工程 2015年第3期23卷 810-818页

作者：张蕾金龙旭韩双丽吕增明李新娥中国科学院长春光学精密机械与物理研究所吉林长春130033 中国科学院大学北京100039 东北师范大学物理学院吉林长春130024

提出基于多尺度变换和区域相结合的红外与可见光图像融合方法,用于有效保留红外图像与可见光图像中的空间信息及热目标信息,提升融合图像的可观测性和可理解性。首先,基于非采样Contourlet变换(NSCT)方法对红外和可见光图像进行初步融合... 详细信息

提出基于多尺度变换和区域相结合的红外与可见光图像融合方法,用于有效保留红外图像与可见光图像中的空间信息及热目标信息,提升融合图像的可观测性和可理解性。首先,基于非采样Contourlet变换(NSCT)方法对红外和可见光图像进行初步融合,采用基于局部能量的规则融合低通子带系数,根据尺度内各方向子带的相关性原则融合带通方向子带系数。然后,计算初次融合后所得的融合图像与源图像的结构相似性(SSIM),根据源图像与初次融合图像的结构相似程度对图像进行区域分类,得到相似区域分类标识图。最后,依据区域内各自的相似度特性,分别采用不同的融合策略进行二次融合,从而得到最终的融合结果。实验结果表明:该方法能够充分提取源图像的区域特征和纹理特征,融合结果在主观和客观评价上均优于目前流行的融合方法。与仅使用NSCT法进行融合相比,实验所采用的两组图像的质量评价指标分别提高了16%、85%、54%、36%和18%、102%、84%、41%。表明该方法在主客观评价上均优于双树复杂小波变换(DTCWT)、NSCT、冗余离散小波变换(RDWT)等方法。

关键词：图像融合红外图像可见光图像多尺度变换非采样Contourlet变换结构相似度

用于目标跟踪的大视场CCD相机自动调光方法及实现

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液晶与显示 2009年第6期24卷 928-933页

作者：张宇赵贵军李国宁金龙旭任建岳吕增明中国科学院长春光学精密机械与物理研究所吉林长春130033 中国科学院研究生院北京100039 总装备部沈阳军事代表局辽宁沈阳110013

针对用于目标跟踪的大视场CCD相机的特殊结构,为了获得高质量图像,提出了一种基于电子快门无级调节的自动调光方法,即通过实时调整CCD相机的曝光时间来实现快速、高精度调光。文中提出了多区域灰度加权的图像灰度均值提取方法,消除了因... 详细信息

针对用于目标跟踪的大视场CCD相机的特殊结构,为了获得高质量图像,提出了一种基于电子快门无级调节的自动调光方法,即通过实时调整CCD相机的曝光时间来实现快速、高精度调光。文中提出了多区域灰度加权的图像灰度均值提取方法,消除了因大视场CCD相机背景图像数据过多而给自动调光带来的影响。系统采用FPGA内置RAM,通过乒乓缓存策略保证调光算法的实时性。通过对CCD相机的辐射定标和外景成像实验表明:该调光方法在辐亮度为25.697～260.548W/***区间内具有良好的图像质量,不仅满足调光速度快、实时性好、适应性强的要求,而且与无调光模式工作状态比较,CCD相机的动态范围增大了20倍,满足调光范围宽的要求。

关键词：目标跟踪大视场电子快门无级调节

Fabrication of polyetheretherketone(PEEK)-based 3D electronics with fine resolution by a hydrophobic treatment assisted hybrid additive manufacturing method

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International Journal of Extreme Manufacturing 2023年第3期5卷 519-532页

作者： Liexin Wu Li Meng Yueyue Wang ming lv Taoyuan Ouyang Yilin Wang Xiaoyan zeng Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074People’s Republic of China

Additive manufacturing(AM)is a free-form technology that shows great potential in the integrated creation of three-dimensional(3D)***,the fabrication of 3D conformal circuits that fulfill the requirements of high service temperature,high conductivity and high resolution remains a *** this paper,a hybrid AM method combining the fused deposition modeling(FDM)and hydrophobic treatment assisted laser activation metallization(LAM)was proposed for manufacturing the polyetheretherketone(PEEK)-based 3D electronics,by which the conformal copper patterns were deposited on the 3D-printed PEEK parts,and the adhesion between them reached the 5B high ***,the 3D components could support the thermal cycling test from-55℃ to 125℃ for more than 100 ***,the application of a hydrophobic coating on the FDM-printed PEEK before LAM can promote an ideal catalytic selectivity on its surface,not affected by the inevitable printing borders and pores in the FDM-printed parts,then making the resolution of the electroless plated copper lines improved *** consequence,Cu lines with width and spacing of only60μm and 100μm were obtained on both as-printed and after-polished PEEK ***,the potential of this technique to fabricate 3D conformal electronics was demonstrated.

关键词： PEEK fused deposition modeling hydrophobic treatment laser activation metallization integrated manufacturing of 3D electronics resolution

Sortilin-induced lipid accumulation and atherogenesis are suppressed by HNF1b SUMOylation promoted by flavone of Polygonatum odoratum

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2023年第11期24卷 998-1013页

作者： Fang LIU Shirui CHEN Xinyue ming Huijuan LI Zhaoming zeng Yuncheng lv Guangxi Key Laboratory of Diabetic Systems Medicine&Institute of Basic Medical Sciences Faculty of Basic Medical SciencesGuilin Medical UniversityGuilin541199China Hunan mingshun Pharmaceutical Co. Ltd.Shaodong422800China

This study aims to investigate the impact of hepatocyte nuclear factor 1β(HNF1b)on macrophage sortilin-mediated lipid metabolism and aortic atherosclerosis and explore the role of the flavone of Polygonatum odoratum(PAOA-flavone)-promoted small ubiquitin-related modifier(SUMO)modification in the atheroprotective efficacy of ***1b was predicted to be a transcriptional regulator of sortilin expression via bioinformatics,dual-luciferase reporter gene assay,and chromatin ***1b overexpression decreased sortilin expression and cellular lipid contents in THP-1 macrophages,leading to a depression in atherosclerotic plaque formation in low-density lipoprotein(LDL)receptor-deficient(LDLR−/−)*** SUMO1-modified sites were identified on the HNF1b protein and co-immunoprecipitation confirmed its SUMO1 *** SUMOylation of HNF1b protein enhanced the HNF1b-inhibited effect on sortilin expression and reduced lipid contents in ***-flavone treatment promoted SUMO-activating enzyme subunit 1(SAE1)expression and SAE1-catalyzed SUMOylation of the HNF1b protein,which prevented sortilin-mediated lipid accumulation in macrophages and the formation of atherosclerotic plaques in apolipoprotein E-deficient(ApoE−/−)*** with SAE1 abrogated the improvement in lipid metabolism in macrophage cells and atheroprotective efficacy in vivo upon PAOA-flavone *** summary,HNF1b transcriptionally suppressed sortilin expression and macrophage lipid accumulation to inhibit aortic lipid deposition and the development of *** anti-atherosclerotic effect was enhanced by PAOA-flavone-facilitated,SAE1-catalyzed SUMOylation of the HNF1b protein.

关键词： Atherosclerosis Lipid accumulation Hepatocyte nuclear factor 1β(HNF1b) Flavone of Polygonatum odoratum SUMOylation

Impact of Coronary Artery Anatomy in Arterial Switch Operation:In-hospital and Post-discharge Outcomes

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Current Medical Science 2022年第3期42卷 642-649页

作者： Shu-yuan WANG Qing-yu zeng Li ZHANG Qing lv ming-xing XIE Department of Ultrasound Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Clinical Research Center for Medical Imaging in Hubei Province Wuhan 430022China Hubei Province Key Laboratory of Molecular Imaging Wuhan 430022China Shenzhen Huazhong University of Science and Technology Insititute Shenzhen 518057China

Objective The influence of the coronary artery anatomy on the prognosis of patients receiving an arterial switch operation(ASO)is currently controversial,and the risk factors for this operation may change in more complicated *** study aimed to investigate the influence of coronary artery anomalies on the in-hospital and post-discharge outcomes of ASO in patients with transposition of the great arteries(TGA)and Taussig-Bing anomaly(TBA).Methods We retrospectively reviewed 206 patients who underwent ASO from January 2007 to December *** median age at operation was 33[interquartile range(IQR):20–71]*** follow-up time was 7.2 years(IQR:4.0–10.3 years).Results Coronary anomalies were present in 86 patients(41.7%),with 9(4.4%)of them having a single coronary *** coronary features included intramural courses in 5(2.4%)patients,ostial stenosis in 1(0.5%)patient,and accessory coronary artery orifices in 5(2.4%)*** were 32(15.5%)in-hospital deaths and 8(4.6%)post-discharge deaths,yielding an overall survival of 81.3%,80.7%and 79.9%at 1,5 and 10 years,*** due to ASO has been drastically decreased since *** with a single coronary artery had higher rate of in-hospital mortality,but this finding was not statistically *** earlier surgical era(OR:2.756)and a longer cardiopulmonary bypass time(OR:2.336)were significantly associated with in-hospital mortality,while coronary patterns were *** intramural coronary artery(HR:10.034)and a patient age of older than 1 year at the time of ASO(HR:9.706)were independent predictors of post-discharge *** ASO remains the procedure of choice for TGA with coronary anomalies with acceptable in-hospital and post-discharge outcomes in terms of overall survival and freedom of ***,intramural coronary artery is an independent risk factor for post-discharge *** surgery within the 1st year of life helps improve overall m

关键词： congenital heart disease complex coronary artery early mortality late mortality learning curve

基于算法状态机FPGA的空间TDICCD相机控制器

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太赫兹科学与电子信息学报 2013年第4期11卷 650-654页

作者：李进金龙旭韩双丽张然峰吕曾明郝贤鹏中国科学院长春光学精密机械与物理研究所吉林长春130033 中国科学院研究生院北京100039

针对目前基于数字信号处理(DSP)的空间时间延时积分电荷耦合器件(TDICCD)相机控制器可靠性差、资源耗费和功耗大、程序重调能力差等问题,提出了一种算法状态机现场可编程门阵列(FPGA)的空间电荷耦合器件(CCD)相机控制器。控制器使用FPG... 详细信息

针对目前基于数字信号处理(DSP)的空间时间延时积分电荷耦合器件(TDICCD)相机控制器可靠性差、资源耗费和功耗大、程序重调能力差等问题,提出了一种算法状态机现场可编程门阵列(FPGA)的空间电荷耦合器件(CCD)相机控制器。控制器使用FPGA代替DSP,控制程序使用VHDL语言编写。使用自主研发的地面检测设备进行实验,实验结果表明,相机控制器可以稳定正常地工作,控制CCD拍摄的图像清晰,未发生串行现象。整个控制程序占用FPGA资源较少,占用LUTs和Block RAMs分别为38%和20%,满足空间CCD相机应用的需求。

关键词：电荷耦合器件相机控制器现场可编程门阵列算法状态机

Finite Groups with Some Bounded Codegrees

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Acta Mathematica Sinica,English Series 2024年第7期40卷 1778-1784页

作者： Dong Fang YANG Yu zeng Heng lv School of Mathematics and Statistics Southwest UniversityChongqing400715P.R.China Department of Mathematics Changshu Institute of TechnologyChangshu215500P.R.China

For a characterχof a finite group G,the number cod(χ) := ∣G:ker(χ)∣/χ(1)is called the codegree ofχ.In this paper,we give a solvability criterion for a finite group G depending on the minimum of the ratioχ(1)^(... 详细信息

关键词： Finite group codegree degree simple group

Significance and challenges of stereoselectivity assessing methods in drug metabolism

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Journal of Pharmaceutical Analysis 2016年第1期6卷 1-10页

作者： Zhuowei Shen Chuang lv Su zeng Institute of Drug Metabolism and Pharmaceutical Analysis Zhejiang Province Key Laboratory of Anti-Cancer Drug Research College of Pharmaceutical Sciences Zhejiang University Biogen Idec Cambridge

Stereoselectivity in drug metabolism can not only influence the pharmacological activities, tolerability, safety, and bioavailability of drugs directly, but also cause different kinds of drug-drug interactions. Thus, assessing stereoselectivity in drug metabolism is of great significance for pharmaceutical research and development （R＆D） and rational use in clinic. Although there are various methods available for assessing stereoselectivity in drug metabolism, many of them have shortcomings. The indirect method of chro- matographic methods can only be applicable to specific samples with functional groups to be derivatized or form complex with a chiral selector, while the direct method achieved by chiral stationary phases （CSPs） is expensive. As a detector of chromatographic methods, mass spectrometry （MS） is highly sen- sitive and specific, whereas the matrix interference is still a challenge to overcome. In addition, the use of nuclear magnetic resonance （NMR） and immunoassay in chiral analysis are worth noting. This review presents several typical examples of drug stereoselective metabolism and provides a literature-based evaluation on current chiral analytical techniques to show the significance and challenges of stereo- selectivity assessing methods in drug metabolism.

关键词： Enantiomer Chiral chromatography Capillary electrophoresis Mass spectrometry NMR Immunoassay