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An Improved Time-Domain Inverse Technique for Localization and Quantifcation of Rotating Sound Sources

Chinese Journal of Mechanical Engineering 2023年第5期36卷 304-314页

作者： Xiaozheng Zhang yinlong li Yongbin Zhang Chuanxing Bi Jinghao li liang Xu Institute of Sound and Vibration Research Hefei University of TechnologyHefei 230009China Volkswagen(Anhui)Automotive Company limited Hefei 230000China East China Electric Power Test&Research Institute China Datang Corporation Science and Technology General Research Institute Co.LTDHefei 230088China

The time-domain inverse technique based on the time-domain rotating equivalent source method has been proposed to localize and quantify rotating sound sources. However, this technique encounters two problems to be addressed: one is the time-consuming process of solving the transcendental equation at each time step, and the other is the difculty of controlling the instability problem due to the time-varying transfer matrix. In view of that, an improved technique is proposed in this paper to resolve these two problems. In the improved technique, a de-Dopplerization method in the time-domain rotating reference frame is frst applied to eliminate the Doppler efect caused by the source rotation in the measured pressure signals, and then the restored pressure signals without the Doppler efect are used as the inputs of the time-domain stationary equivalent source method to locate and quantify sound sources. Compared with the original technique, the improved technique can avoid solving the transcendental equation at each time step, and facilitate the treatment of the instability problem because the transfer matrix does not change with time. Numerical simulation and experimental results show that the improved technique can eliminate the Doppler efect efectively, and then localize and quantify the rotating nonstationary or broadband sources accurately. The results also demonstrate that the improved technique can guarantee a more stable reconstruction and compute more efciently than the original one.

关键词： Rotating sound sources De-Dopplerization Time-domain equivalent source method

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The Potential Distribution Prediction of Oncomelania hupensis Based on Newly Emerging and Reemergent Habitats-China,2015−2019

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China CDC weekly 2021年第5期3卷 90-93,I0001,I0002页

作者： Yanfeng Gong yinlong li lijuan Zhang Shan Lv Jing Xu Shizhu li National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionChinese Center for Tropical Diseases ResearchWHO Collaborating Centre for Tropical DiseasesNational Center for International Research on Tropical DiseasesMinistry of Science and TechnologyKey Laboratory of Parasite and Vector BiologyNational Health Commission of ChinaShanghaiChina

What is already known about this topic?Oncomelania hupensis(***)is the only intermediate host of Schistosoma *** distribution of *** is affected by a series of climate,geographical,sand ocioeconomic factors,which reflect the risk areas of *** is added by this report?There were certain geographical aggregations in the potential high distribution areas of ***,which were mainly distributed in Poyang Lake area,Dongting Lake area,and the middle and the lower reaches of the Yangtze *** are the implications for public health practice?Monitoring and forecasting the distribution of *** is conducive to improving the early warning capabilities of the potential risk of schistosomiasis transmission and progressively promoting the elimination of schistosomiasis nationwide.

关键词： Schistosoma schistosomiasis pens

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Sentinel Surveillance of Schistosomiasis—China,2021

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China CDC weekly 2023年第12期5卷 278-282页

作者： Suying Guo Hui Dang yinlong li lijuan Zhang Fan Yang Junyi He Chunli Cao Jing Xu Shizhu li National Institute of Parasitic Diseases Chinese Center for Disease Control and PreventionChinese Center for Tropical Diseases ResearchNHC Key Laboratory of Parasite and Vector BiologyWHO Collaborating Centre for Tropical DiseasesNational Center for International Research on Tropical DiseasesShanghaiChina

Introduction:This report analyzes the national surveillance data for schistosomiasis in 2021 to understand the current status and provide evidence for further policy actions to promote *** analysis is in line with the National Surveillance Plan of Schistosomiasis,which was revised in 2020 to adapt to the new stage of moving towards ***:Data from the 2021 national surveillance of schistosomiasis in humans,livestock,and snails were collected from 13 provincial-level administrative divisions(PLADs)and analyzed using descriptive epidemiological *** antibody-positive rate and area of newly discovered and re-emergent snail habitats were ***:In 2021,a total of 31,661 local residents and 101,558 transient population were screened for antibodies using indirect hemagglutination assay(IHA).Of those who tested positive,745 local residents and 438 transient population underwent further parasitological examination,with only one stool-positive result in the transient ***,12,966 livestock were examined using the miracidia hatching test,with no positives *** total area of newly discovered and re-emergent snail habitats was 957,702 m^(2) and 4,381,617 m^(2),*** infected snails were found using the microscopic dissection method,but six pooled snail samples were reported as positive using the loopmediated isothermal amplification method for detecting specific sequences of ***,in Anhui and Jiangxi ***:The prevalence of schistosomiasis among humans and livestock was found to be low,however,a potential transmission risk was identified in certain *** reduce the risk of transmission,a comprehensive control strategy should be continued and new techniques should be implemented in the surveillance and early warning system.

关键词： transient elimination Anhui

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Recent advances in photochemistry for positron emission tomography imaging

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Chinese Chemical Letters 2024年第8期35卷 149-162页

作者： Jing-Jing Zhang Lujun Lou Rui Lv Jiahui Chen yinlong li Guangwei Wu lingchao Cai Steven H.liang Zhen Chen Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest BiomassJiangsu Key Lab of Biomass-Based Green Fuels and ChemicalsInternational Innovation Center for Forest Chemicals and MaterialsCollege of Chemical EngineeringNanjing Forestry UniversityNanjing 210037China Department of Radiology and Imaging Sciences Emory UniversityAtlantaGA 30322United States

As a powerful noninvasive imaging technology,positron emission tomography(PET)has been playing an important role in disease theranostics and drug *** successful application of PET relies on not only the biological properties of PET tracers but also the availability of facile and efficient radiochemical reactions to enable practical production and widespread use of PET *** recently,photochemistry is emerging as a novel,mild and efficient approach to generating PET *** this review,we focus on the recent advances in newly developed photocatalytic radiochemical reactions,innovation on automated photochemical radiosynthesis modules,as well as implementation in late-stage radiolabeling and radio-pharmaceutical synthesis for PET *** believe that this review will inspire the development of more promising radiolabeling protocols for the preparation of clinically useful PET agents.

关键词： Positron emission tomography(PET) Fluorine-18 Carbon-11 Photocatalysis Automation Late-stage functionalization

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基于气路参数融合的涡扇发动机性能退化预测

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航空动力学报 2021年第11期36卷 2251-2260页

作者：郭庆李印龙中国民航大学航空工程学院天津300300

针对单参数驱动的涡扇发动机性能退化预测精度不高的问题,提出了一种基于气路参数融合的涡扇发动机性能退化预测的方法。通过监测发动机性能退化过程中多源参数,采用专家经验和核主成分分析相结合的方法,进行发动机性能参数的选择和融合... 详细信息

针对单参数驱动的涡扇发动机性能退化预测精度不高的问题,提出了一种基于气路参数融合的涡扇发动机性能退化预测的方法。通过监测发动机性能退化过程中多源参数,采用专家经验和核主成分分析相结合的方法,进行发动机性能参数的选择和融合,从而构建健康参数。基于非线性Wiener过程构建涡扇发动机退化模型,采用极大似然方法求得发动机退化模型的离线参数估计值;由于不同发动机性能退化的差异性,基于贝叶斯更新理念对随机参数进行实时更新,可以实现对单台发动机的性能退化实时预测。通过实例验证,采用此方法在预测末端方均根误差为0.028 3,整体预测精度提升了54.5%,可以辅助指导维修决策。

关键词：性能退化预测涡扇发动机多参数融合核主成分分析非线性Wiener

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Discovery and evaluation of a novel ^(18)F-labeled vasopressin 1a receptor PET ligand with peripheral binding specificity

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Acta Pharmaceutica Sinica B 2024年第9期14卷 4014-4027页

作者： Junqi Hu yinlong li Chenchen Dong Huiyi Wei Kai liao Junjie Wei Chunyu Zhao Ahmad Chaudhary Jiahui Chen Hao Xu Ke Zhong Steven H.liang Lu Wang Weijian Ye Center of Cyclotron and PET Radiopharmaceuticals Department of Nuclear Medicine&Key Laboratory of Basic and Translational Research on Radiopharmaceuticalsthe First Affiliated Hospital of Jinan UniversityGuangzhou 510630China Department of Radiology and Imaging Sciences Emory UniversityAtlant1GA 30322USA Department of Pharmacy Sun Yat-sen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China

The arginine-vasopressin(AVP)hormone plays a pivotal role in regulating various physiological processes,such as hormone secretion,cardiovascular modulation,and social *** studies have highlighted the V1a receptor as a promising therapeutic ***-depth insights into V1a receptor-related pathologies,attained through in vivo imaging and quantification in both peripheral organs and the central nervous system(CNS),could significantly advance the development of effective V1a *** address this need,we develop a novel V1a-targeted positron emission tomography(PET)ligand,[^(18)F]V1A-2303([^(18)F]8),which demonstrates favorable in vitro binding affinity and selectivity for the V1a *** tracer binding in peripheral tissues was also confirmed through rigorous cell uptake studies,autoradiography,biodistribution ***,[^(18)F]8 was employed in PET imaging and arterial blood sampling studies in healthy rhesus monkeys to assess its brain permeability and specificity,whole-body distribution,and kinetic *** research indicated[^(18)F]8 as a valuable tool for noninvasively studying V1a receptors in peripheral organs,and as a foundational element for the development of next-generation,brain-penetrant ligands specifically designed for the CNS.

关键词： Vasopressin Autism V1a receptor Positron emission tomography PET imaging Radiolabeling Fluorine 18 Kinetic modeling

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Rapid Assessment on Potential Risks of Schistosomiasis Transmission—7 PLADs,China,2019 and 2021

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China CDC weekly 2021年第51期3卷 1089-1092页

作者： Junyi He Hongqing Zhu Ziping Bao lijuan Zhang yinlong li Ting Feng Suying Guo Wangping Deng Can Wang Hui Dang Tiewu Jia Chao Lyu Zhiqiang Qin Chunli Cao Jing Xu Shizhu li Xiaonong Zhou National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention(Chinese Center for Tropical Diseases Research)NHC Key Laboratory of Parasite and Vector BiologyWHO Collaborating Centre for Tropical DiseasesNational Center for International Research on Tropical DiseasesShanghaiChina.

Summary What is already known about this topic?Oncomelania hupensis(***)and livestock are main infection sources of *** schistosome infected *** and livestock’s feces are important risk factors in the transmission of *** is added by this report?The potential risks of schistosomiasis transmission remain prevalent,giving an early warning to local government with information on existing transmission *** is expected that the effectiveness and efficiency of schistosomiasis surveillance could be improved by conducting rapid risk assessment at the beginning of transmission season.

关键词： schistosomiasis Schistosomiasis conducting

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Schistosomiasis Surveillance--China,2015−2018

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China CDC weekly 2020年第3期2卷 39-43页

作者： yinlong li Hui Dang lijuan Zhang Guangping li Xiaowei Shan Min Yuan Songjun Ding Yun Feng Meifen Shen Jia Xu Yanjun Jin Haijuan Du Wencheng Lu Wenqian Tang Dianwei Jiang Yi Yuan Shan Lyu Shizhu li Xiao-nong Zhou National Institute of Parasitic Diseases Chinese Center for Disease Control and Prevention/Chinese Center for Tropical Disease Research/WHO Collaborating Center for Tropical Diseases/National Center for International Research on Tropical DiseasesMinistry of Science and Technology/Key Laboratory of Parasite and Vector BiologyMinistry of HealthShanghaiChina Hunan Provincial Institute of Schistosomiasis Control YueyangHunanChina Hubei Provincial Center for Disease Control and Prevention WuhanHubeiChina Jiangxi Provincial Institute of Parasitic Diseases Control NanchangJiangxiChina Anhui Provincial Institute of Schistosomiasis Control HefeiAnhuiChina Jiangsu Institute of Schistosomiasis Control WuxiJiangsuChina Yunnan Institute of Endemic of Diseases Control and Prevention DaliYunnanChina Institute of Parasitic Diseases Control and Prevention Sichan Center for Disease Control and PreventionChengduSichuanChina Shanghai Municipal Center for Disease Control and Prevention ShanghaiChina Zhejiang Academy of Medical Sciences HangzhouZhejiangChina Center for Disease Control and Prevention of Guangdong Province GuangzhouGuangdongChina Guangxi Zhuang Autonomous Region Center for Disease Prevention and Control NanningGuangxiChina Fujian Provincial Center for Disease Control and Prevention FuzhouFujianChina Chongqing Municipal Center for Disease Control and Prevention ChongqingChina

Background The prevalence of schistosomiasis in China is at the lowest level in history,and sentinel surveillance sites of schistosomiasis have fully covered all epidemic areas of *** article has analyzed the surveillance data for the last four years and can help guide the next stage of surveillance work at the national level,including the scope of surveillance,surveillance content,and surveillance methods,*** Data from the National Schistosomiasis Surveillance System were *** infection rate of schistosomiasis among the human population,livestock,snails,and the change of the breeding area of snails in sentinel surveillance sites for four consecutive years were analyzed,and the trends in schistosomiasis prevalence in surveillance sites were *** The prevalence of schistosomiasis in all sentinel surveillance sites of China showed downward trends from 2015 to 2018 with infection rates decreasing in this time period for local human population(0.05%to 0.00%),the floating population(0.020% to 0.003%),and cattle(0.037% to 0.000%).No infected snails were found during the *** 2015 to 2018,the total area of newly found habitats of snails(Oncomelania hupensis,***)were 34,730 m^(2),1,367,694 m^(2),18,944 m^(2),and 50,420 m^(2),and the total area of re-emergent habitats of snails(***)were 822,194 m^(2),1,391,779 m^(2),1,516,292 m^(2),and 1,750,558 m^(2),*** and Implications for Public Health Practice The prevalence of schistosomiasis in human and livestock is going down and is sustained at a very low level,but new and re-emerging habitats of *** are new challenges regardless of the achievement of schistosomiasis ***,two actions are necessary to effectively further reduce the transmission risk of schistosomiasis:1)taking effective measures to control the source of infection of schistosomiasis;and 2)reducing the breeding areas of ***.

关键词： sustained Schistosomiasis breeding

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空间相机匀速扫描干扰补偿控制方法

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中国空间科学技术 2021年第2期41卷 125-132页

作者：张艾林喆李婧李寅龙北京空间机电研究所北京100094

针对空间相机匀速扫描中的周期干扰,研究永磁同步电机(PMSM)抗扰控制问题。为了解决传统状态观测器与内模原理补偿方法形式复杂、计算量大的问题,结合敏感器测量输出和系统模型推导出干扰量,并在重构干扰的基础上,采用超前输入补偿策略... 详细信息

针对空间相机匀速扫描中的周期干扰,研究永磁同步电机(PMSM)抗扰控制问题。为了解决传统状态观测器与内模原理补偿方法形式复杂、计算量大的问题,结合敏感器测量输出和系统模型推导出干扰量,并在重构干扰的基础上,采用超前输入补偿策略快速抑制扰动影响。该方法形式简洁,计算量小,经数学仿真和试验验证,可有效抑制系统正弦扰动,改善稳态性能,减少相机抖动,满足空间成像需求。

关键词：空间相机扫描控制永磁同步电机周期干扰推力波动

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对等结构下的相对导航源选择研究

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航空兵器 2021年第4期28卷 43-48页

作者：张天舒李寅龙海军航空大学山东烟台264001

在集中式与分布式结构基础上建立基于对等式结构的模型,针对对等式结构下无源定位相对导航的源最优选择问题,利用高斯-牛顿法设置相对导航卡尔曼滤波器初值使其快速收敛,定义时间、位置、几何、综合误差因子,设置不同仿真环境研究距离... 详细信息

在集中式与分布式结构基础上建立基于对等式结构的模型,针对对等式结构下无源定位相对导航的源最优选择问题,利用高斯-牛顿法设置相对导航卡尔曼滤波器初值使其快速收敛,定义时间、位置、几何、综合误差因子,设置不同仿真环境研究距离、速度、时间偏差和几何分布位置对相对导航精度的影响。仿真表明,偏差与相对导航精度呈反比关系。当待定位节点与导航源连线夹角为90°时,导航精度最高,导航源直线配置时,宽基线方案的精度要明显优于窄基线方案,且四源定位的精度优于两源、三源定位。本文建立的算法模型能够较好分析不同因素对定位误差的影响。

关键词：对等式结构相对导航卡尔曼滤波初始偏差几何分布位置雷达信号目标跟踪

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