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THE HAUSDORFF MEASURE FOR THE SAMPLE PATH OF THE WESTWATER PROCESS

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Chinese Annals of Mathematics,Series B 1996年第3期17卷 375-388页

作者： zhou xianyin(Depatment of Mathematics, Beijing Normal University Beijing 100875, China) BEIJING NORMAL UNIV DEPT MATHBEIJING 100875PEOPLES R CHINA

It is proved that φ(s) = s2 log |logs| is the correct function to give the Hausdorff measureof a sample path of the Westwater process.

关键词： Hausdorff measure Wiener process Westwater process Sojourn time

ON THE RANGE OF RANDOM WALKS IN RANDOM ENVIRONMENT　

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Chinese Annals of Mathematics,Series B 1995年第1期16卷 131-138页

作者： zhou xianyin(Department of Mathematics, Beijing Normal University, Beijing 100875, China.) BEIJING NORMAL UNIV DEPT MATHBEIJING 100875PEOPLES R CHINA

The range of random walk on Z￣d in symmetric random environment is investigated. As results, it is proved that the strong law of large numbers for the range of random walk on Zdin some random environments holds if d... 详细信息

关键词： Law of large numbers Ergodic theorem Range of random walk Random environment Effective resistance.

“一校两点,普特协同”的乡村残疾儿童融合安置模式探究

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现代特殊教育 2024年第18期 45-51页

作者：赵斌陈鸿宇刘静静杨晖周贤银西南大学教育学部特殊教育学院重庆400715 重庆市万州区特殊教育中心重庆404130 重庆市奉节县特殊教育学校重庆404600

乡村融合教育是融合教育的重点和难点。为妥善安置乡村地区适龄残疾儿童青少年接受教育,A县于2018年因地制宜地提出并实践以特殊教育学校、地方教育委员会、普通学校及家长为实施主体的“一校两点”乡村融合教育安置模式,取得了一定成... 详细信息

乡村融合教育是融合教育的重点和难点。为妥善安置乡村地区适龄残疾儿童青少年接受教育,A县于2018年因地制宜地提出并实践以特殊教育学校、地方教育委员会、普通学校及家长为实施主体的“一校两点”乡村融合教育安置模式,取得了一定成效。未来“一校两点”融合教育安置模式仍需进一步优化,形成以普特协同机制为内核的乡村融合教育发展新路径。

关键词：乡村残疾儿童融合教育一校两点普特协同

Cathodic shift of onset potential on TiO_(2)nanorod arrays with significantly enhanced visible light photoactivity via nitrogen/cobalt co-implantation

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Chinese Physics B 2021年第5期30卷 114-119页

作者： xianyin Song Hongtao zhou Changzhong Jiang College of Materials Science and Engineering Hunan UniversityChangsha 410082China

Despite anionic doping has been widely implemented to increase the visible light activity of TiO_(2),it often gives rise to a dramatical anodic shift in current onset ***,we show an effective method to achieve the huge cathodic shift of TiO_(2) photoanode with significantly enhanced visible light photo-electrochemical activity by nitrogen/cobalt *** nitrogen/cobalt co-doped TiO_(2)nanorod arrays(N/Co-TiO_(2))exhibit a cathodic shift of 350 mV in onset potential relative to only nitrogen-doped TiO_(2)(N-TiO_(2)).Moreover,the visible-light(λ>420 nm)photocurrent density of N/Co-TiO_(2) reaches 0.46 mA/cm^(2),far exceeding 0.07 mA/cm^(2) in N-TiO_(2)at 1.23 V versus reversible hydrogen electrode(RHE).Systematic characterization studies demonstrate that the enhanced photo-electrochemical performance can be attributed to the surface synergic sputtering of high-energy nitrogen/cobalt ions.

关键词： ion implantation TiO_(2) surface sputtering photo-electrochemical water splitting

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阿赛线低输量正反输温降规律研究

辽宁石油化工大学学报 2024年第6期44卷 59-64页

作者：尚培娟韩吉普王毅杰田静茹黄启玉周贤胤中国石油大学(北京)机械与储运工程学院/城市油气输配技术北京市重点实验室北京102249 中国石油华北油田公司二连分公司内蒙古锡林浩特026000 中国石油吉林油田分公司二氧化碳开发公司吉林松原138000

利用SPS仿真软件建立正反输仿真模型,对处于低输量工况的阿赛线管道进行正反输运行模拟,并研究了正反输过程中沿线油温随时间的变化规律,以及反输输量对反输温降的影响。结果表明,正输稳态下沿线油温逐渐降低;反输开始沿线油温先降低后... 详细信息

利用SPS仿真软件建立正反输仿真模型,对处于低输量工况的阿赛线管道进行正反输运行模拟,并研究了正反输过程中沿线油温随时间的变化规律,以及反输输量对反输温降的影响。结果表明,正输稳态下沿线油温逐渐降低;反输开始沿线油温先降低后升高,达到稳态后油温逐渐降低;反输进站油温先降低后稍有升高,最终趋于稳定;明确了正反输过程中原油最低温度为存留原油被完全推出管道时的进站温度;反输输量越大,反输过程中的最低油温越高,达到反输稳定状态也更快。通过SPS仿真软件模拟分析得出的正反输工艺温度变化可为确定阿赛线正反输运行方案提供一定依据。

关键词：含蜡原油低输量正反输 SPS仿真温度

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Cucurbit[8]uril-mediated phosphorescent supramolecular foldamer for antibiotics sensing in water and cells

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Chinese Chemical Letters 2022年第2期33卷 851-854页

作者： De-Ao Xu Qing-Yang zhou xianyin Dai Xin-Kun Ma Ying-Ming Zhang Xiufang Xu Yu Liu College of Chemistry State Key Laboratory of Elemento-Organic ChemistryNankai UniversityTianjin 300071China

A phosphorescent supramolecular foldamer is conveniently constructed by the 1:1 host-guest complexation with cucurbit[8]uril and 1,2-diaminocyclohexane-bridged 4-(4-bromophenyl)-pyridinium salt. The tightly compact host-guest complexation in molecular foldamer can greatly suppress the fluorescence emissive channel and promote the intersystem crossing from singlet to triplet states, thus leading to the green phosphorescence at ambient temperature in aqueous solution. More intriguingly, the phosphorescence emission shows very rapid and sensitive responsiveness to different antibiotics in both inanimate milieu and living cells. Remarkably, the limit of detection of such binary inclusion complex toward sulfamethazine can reach as low as 1.86 × 10^(-7) mol/L. Thus, it is envisaged that this supramolecular nanoplatform featuring unique complexation-enhanced phosphorescence emission may hold great promise in sensing and detecting many other biological targets under physiological environment.

关键词： Supramolecular assembly Cucurbiturils Supramolecular foldamer Phosphorescence sensing Antibiotics detection

Natural evidence of coronaviral 2′-O-methyltransferase activity affecting viral pathogenesis via improved substrate RNA binding

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Signal Transduction and Targeted Therapy 2024年第6期9卷 2819-2834页

作者： Jikai Deng Shimin Yang Yingjian Li Xue Tan Jiejie Liu Yanying Yu Qiang Ding Chengpeng Fan Hongyun Wang xianyin Chen Qianyun Liu Xiao Guo Feiyu Gong Li zhou Yu Chen State Key Laboratory of Virology RNA InstituteCollege of Life Sciences and Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhanChina School of Medicine Tsinghua UniversityBeijingChina School of Basic Medical Sciences Wuhan UniversityWuhanChina Animal Bio-Safety Level Ⅲ Laboratory/Institute for Vaccine Research Wuhan University School of MedicineWuhanChina

Previous studies through targeted mutagenesis of K-D-K-E motif have demonstrated that 2′-O-MTase activity is essential for efficient viral replication and immune ***,the K-D-K-E catalytic motif of 2′-O-MTase is highly conserved across numerous viruses,including flaviviruses,vaccinia viruses,coronaviruses,and extends even to ***,we observed a stronger 2′-O-MTase activity in SARS-CoV-2 compared to SARS-CoV,despite the presence of a consistently active catalytic *** further identified critical residues(Leu-36,Asn-138 and Ile-153)which served as determinants of discrepancy in 2′-O-MTase activity between SARS-CoV-2 and *** residues significantly enhanced the RNA binding affinity of 2′-O-MTase and boosted its versatility toward RNA *** interest,a triple substitution(Leu^(36)→Ile^(36),Asn^(138)→His^(138),Ile^(153)→Leu^(153),from SARS-CoV-2 to SARS-CoV)within nsp16 resulted in a proportional reduction in viral 2′-O-methylation and impaired viral ***,it led to a significant upregulation of type I interferon(IFN-I)and proinflammatory cytokines both in vitro and vivo,relying on the cooperative sensing of melanoma differentiation-associated protein 5(MDA5)and laboratory of genetics and physiology 2(LGP2).In conclusion,our findings demonstrated that alterations in residues other than K-D-K-E of 2′-O-MTase may affect viral replication and subsequently influence *** changes in nsp16 residues is crucial as it may aid in identifying and assessing future alteration in viral pathogenicity resulting from natural mutations occurring in nsp16.

关键词： pathogenesis impaired alterations

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采用HHT与CNN的刀具磨损状态监测

组合机床与自动化加工技术 2023年第10期 169-173,178页

作者：周粤段现银武汉科技大学机械自动化学院湖北430081 武汉科技大学机械传动与制造工程湖北省重点实验室湖北430081

为实现刀具磨损状态监测的智能化及高精度,提出一种将希尔伯特黄变换改进算法与卷积神经网络相结合的监测方法。首先,采用敏感固有模态函数筛选方法改进希尔伯特黄变换,提取出刀具信号的时频特征;其次,运用MATLAB微调卷积神经网络生成... 详细信息

为实现刀具磨损状态监测的智能化及高精度,提出一种将希尔伯特黄变换改进算法与卷积神经网络相结合的监测方法。首先,采用敏感固有模态函数筛选方法改进希尔伯特黄变换,提取出刀具信号的时频特征;其次,运用MATLAB微调卷积神经网络生成刀具磨损监测迁移模型;最后,运用典型的卷积神经网络迁移模型进行实验验证。结果表明,与传统时频变换相比,希尔伯特黄变换提取的时频图更加精细,能有效防止频谱泄露的问题,刀具磨损识别平均准确率达到94.09%,提升近15%;与希尔伯特黄变换相比,改进后的希尔伯特黄变换能避免虚假固有模态分量问题,监测效果进一步提升,达到96.8%,证明了所提监测方法的有效性。

关键词：希尔伯特黄变换卷积神经网络敏感固有模态函数刀具磨损状态监测

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输电线路分段地线感应取能方法研究

电力自动化设备 2019年第3期39卷 219-223页

作者：毛先胤马晓红彭赤代州杨军贵州电网有限责任公司电力科学研究院贵州贵阳550002 贵州电网有限责任公司贵州贵阳550002 电子科技大学机械与电气工程学院四川成都611731

利用导地互感公式推导了不同相线电流情况下地线损耗功率,在此基础上提出了一种可应用于分段地线网络的地线取能方法,并基于所提方法设计了取能设备。该取电装置具有输入动态范围大、转换效率高、抗干扰能力强的特点。在导线负荷满足要... 详细信息

利用导地互感公式推导了不同相线电流情况下地线损耗功率,在此基础上提出了一种可应用于分段地线网络的地线取能方法,并基于所提方法设计了取能设备。该取电装置具有输入动态范围大、转换效率高、抗干扰能力强的特点。在导线负荷满足要求的情况下该装置可以替代光伏电源实现对在线监测设备的稳定供电。

关键词：输电线路地线取能电磁感应稳压电路