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Event-Triggered Asynchronous Guaranteed Cost Control for Markov Jump Discrete-Time Neural Networks With Distributed Delay and Channel Fading

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IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS 2018年第8期29卷 3588-3598页

作者： Yan, Huaicheng zhang, Hao Yang, fuwen Zhan, Xisheng Peng, Chen East China Univ Sci & Technol Minist Educ Key Lab Adv Control & Optimizat Chem Proc Shanghai 200237 Peoples R China Hubei Normal Univ Coll Mechatron & Control Engn Huangshi 435002 Peoples R China Griffith Univ Sch Engn Gold Coast Qld 4222 Australia Shanghai Univ Sch Mechatron Engn & Automat Shanghai 200072 Peoples R China

This paper is concerned with the guaranteed cost control problem for a class of Markov jump discrete-time neural networks (NNs) with event-triggered mechanism, asynchronous jumping, and fading channels. The Markov jump NNs are introduced to be close to reality, where the modes of the NNs and guaranteed cost controller are determined by two mutually independent Markov chains. The asynchronous phenomenon is considered, which increases the difficulty of designing required mode-dependent controller. The event-triggered mechanism is designed by comparing the relative measurement error with the last triggered state at the process of data transmission, which is used to eliminate dispensable transmission and reduce the networked energy consumption. In addition, the signal fading is considered for the effect of signal reflection and shadow in wireless networks, which is modeled by the novel Rice fading models. Some novel sufficient conditions are obtained to guarantee that the closed-loop system reaches a specified cost value under the designed jumping state feedback control law in terms of linear matrix inequalities. Finally, some simulation results are provided to illustrate the effectiveness of the proposed method.

关键词： Asynchronous control event-triggered mechanism fading channels guaranteed cost control Markov jump neural networks

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X射线数字成像技术检测钢筋浆锚搭接灌浆密实度的试验研究

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施工技术 2018年第10期47卷 127-130页

作者：王卓琳李向民高润东许清风张富文谢莹上海市建筑科学研究院上海市工程结构安全重点实验室上海200032 北京天助瑞邦影像设备有限公司北京100176

采用X射线数字成像技术分别对波纹管约束和螺旋箍筋约束的钢筋浆锚搭接试件的灌浆密实度进行了检测。结果表明,X射线数字成像技术的检测效果优于X射线胶片成像法;通过X射线数字成像技术获得的图像信息,可以清楚地判定单排孔道内部灌浆... 详细信息

采用X射线数字成像技术分别对波纹管约束和螺旋箍筋约束的钢筋浆锚搭接试件的灌浆密实度进行了检测。结果表明,X射线数字成像技术的检测效果优于X射线胶片成像法;通过X射线数字成像技术获得的图像信息,可以清楚地判定单排孔道内部灌浆段和非灌浆段的界面,并可以区分双排孔道内不同高度的灌浆段界面。采用该方法检测200mm厚普通预制剪力墙及310mm厚预制夹心保温剪力墙内浆锚搭接灌浆密实度的效果均可行。

关键词：检测钢筋浆锚搭接数字成像 X射线灌浆密实度

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Ecotoxicity of Caenorhabditis elegans following a step and repeated chronic exposure to tetrabromobisphenol A

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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019年第Mar.期169卷 273-281页

作者： Liu, fuwen Zaman, Waqas Qamar Peng, Hongjiang Li, Chao Cao, Xue Huang, Kai Cui, Changzheng zhang, Wei Lin, Kuangfei Luo, Qishi East China Univ Sci & Technol State Environm Protect Key Lab Environm Risk Asse Sch Resource & Environm Engn Shanghai 20023Z Peoples R China Yonker Environm Protect Co Ltd Branch Shanghai Shanghai 200051 Peoples R China Longking Environm Protect Co Ltd Branch Shanghai Shanghai 200331 Peoples R China

To better understand the toxicity of tetrabromobisphenol A (TBBPA), its effects on the model nematode Caenorhabditis elegans were investigated. Following a step and repeated chronic exposure from L4-larvae to day-10 adult, physiology endpoints (growth and locomotion behaviors including head thrashes, body bends and pumping rate), biochemical endpoints (reactive oxygen species, superoxide dismutase activity, catalase activity), and molecular stress-related gene expression were tested at environmentally relevant concentrations of TBBPA (0.01-100 mu g/L). The results showed that concentrations of TBBPA greater than 10 mu g/L, clearly influenced the physiology behaviors (growth and locomotion endpoints). Under repeated exposure, C. elegans exhibited adaptive responses in head thrashes and pumping rate. Compared to toxicity evaluation following repeated chronic exposure, a significantly greater response was induced at the same concentration following a step chronic exposure. Reactive oxygen species production was significantly enhanced following a step and repeated TBBPA exposure at the concentrations of 1 and 10 mu g/L, respectively. qRT-PCR showed that ctl-1, ctl-2, ctl-3 and sod-3 expression significantly increased, which was obviously correlated with physiological and biochemical behaviors under both treatment conditions according to Pearson correlation test analysis. sod-3 and ctl-2 mutations were more sensitive than the wild-type N2 under a step chronic TBBPA exposure at a level of 10 mu g/L. Thus, chronic exposure to TBBPA induces an oxidative stress response in C. elegans, with ctl-2 and sod-3 playing a vital role in TBBPA-induced toxicity in nematodes.

关键词： Caenorhabditis elegans Tetrabromobisphenol A A step chronic exposure Repeated chronic exposure Oxidative stress Environmental risk

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胶原蛋白肽联合海藻酸钠通过下调NLRP3炎症小体表达改善小鼠宫腔粘连

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中国实验动物学报 2023年第10期31卷 1296-1303页

作者：程怡怡赵伟伟宋振峰童福雯刘刚张花施磊磊郭志坤王现伟潘莹孙永琨新乡医学院第三附属医院河南新乡453003 新乡医学院基础医学院河南新乡453003 新乡医学院三全学院河南新乡453003 河南省医用组织再生重点实验室河南新乡453003 南通业盟新材料股份有限公司江苏南通226000

目的探讨胶原蛋白肽(collagen peptide,CP)联合海藻酸钠(sodium alginate,SA)对子宫内膜损伤的修复作用及机制。方法将48只SPF级雌性C57BL/6N小鼠随机分为假手术组、模型组和治疗组,每组各16只。模型组采用微创法经小鼠子宫颈向宫腔注射... 详细信息

目的探讨胶原蛋白肽(collagen peptide,CP)联合海藻酸钠(sodium alginate,SA)对子宫内膜损伤的修复作用及机制。方法将48只SPF级雌性C57BL/6N小鼠随机分为假手术组、模型组和治疗组,每组各16只。模型组采用微创法经小鼠子宫颈向宫腔注射95%乙醇造成子宫内膜损伤,制备小鼠宫腔粘连模型;假手术组向宫腔注射0.9%生理盐水;治疗组向宫腔注射95%乙醇后给予宫腔注射CP+SA混合液。于造模7 d后每组分别取8只小鼠采集样本用于各项检测。HE染色观察小鼠子宫组织病理形态学变化;改良Masson三色染色观察子宫内膜纤维化情况;Western Blot检测子宫组织中炎症因子NLRP3、ASC、Caspase-1、IL-1β、IL-18蛋白表达水平;ELISA检测小鼠血清中炎症因子IL-1β、IL-18的表达。各组剩余的8只小鼠按照雄雌比例为1∶2合笼,记录各组小鼠妊娠数量,于妊娠第14天处死妊娠小鼠,记录胚胎数量。结果(1)与假手术组相比,模型组小鼠子宫内膜厚度变薄,子宫内膜纤维化增加,并有炎症细胞浸润。此外,模型组子宫组织中炎症因子NLRP3、ASC、Caspase-1、IL-1β和IL-18蛋白表达水平以及血清中炎症因子IL-1β和IL-18水平均显著高于假手术组(P<0.05)。(2)与模型组相比,治疗组小鼠子宫内膜损伤程度、子宫内膜纤维化程度及炎症细胞浸润均减轻;此外,治疗组子宫组织中炎症因子NLRP3、ASC、Caspase-1、IL-1β和IL-18蛋白表达水平及血清中炎症因子IL-1β和IL-18水平均显著低于模型组(P<0.05)。(3)与假手术组相比,模型组小鼠生殖能力下降(P<0.01);与模型组相比,治疗组小鼠生殖能力明显改善(P<0.01)。结论CP和SA联合应用可有效改善宫腔粘连模型小鼠子宫组织病理改变,减轻子宫内膜损伤、炎症反应及纤维化程度,改善小鼠生殖能力,其作用机制可能与下调NLRP3炎症小体表达有关,为CP和SA联合应用治疗宫腔粘连提供可靠的实验依据。

关键词：宫腔粘连胶原蛋白肽海藻酸钠 NLRP3炎症小体

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北羌塘坳陷上三叠统沉积模式及对油气勘探的启示

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沉积与特提斯地质 2022年第3期42卷 465-480页

作者：刘中戎杨平张国常范志伟韩京谭富文占王忠曾胜强卫红伟何磊何佳乐中国石油化工股份有限公司勘探分公司四川成都610041 中国地质调查局成都地质调查中心四川成都610081 自然资源部沉积盆地与油气资源重点实验室四川成都610081

基于北羌塘坳陷上三叠统基干剖面实测资料,开展地层层序划分对比和沉积相研究,建立沉积演化模式,揭示对羌塘盆地油气勘探的指示意义。结果表明:(1)北羌塘坳陷晚三叠世卡尼期—诺尼期可以划分为2个Ⅲ级层序,区域上沉积了4套地层,第1个Ⅲ... 详细信息

基于北羌塘坳陷上三叠统基干剖面实测资料,开展地层层序划分对比和沉积相研究,建立沉积演化模式,揭示对羌塘盆地油气勘探的指示意义。结果表明:(1)北羌塘坳陷晚三叠世卡尼期—诺尼期可以划分为2个Ⅲ级层序,区域上沉积了4套地层,第1个Ⅲ级层序对应于甲丕拉组(LST)和波里拉组(TST、HST),第2个Ⅲ级层序对应于阿堵拉组(SMT、TST和HST)和夺盖拉组(RST);(2)北羌塘坳陷甲丕拉组沉积期主要沉积相为扇三角洲和三角洲,波里拉组沉积期可分为沿岸生物礁模式、远端变陡缓坡模式和碳酸盐岩台地模式,阿堵拉组沉积期主要以海岸、浅海陆棚相和三角洲相为主;(3)波里拉组外缓坡亚相和阿堵拉组浅海陆棚相可形成良好的灰泥岩类烃源岩,其中以阿堵拉组广覆式浅海陆棚相泥质烃源岩最重要,波里拉组油苗以海相成因和中高成熟度为主,主要来源于波里拉组外缓坡亚相泥灰岩,后期低熟油来自阿堵拉组浅海陆棚相混合型有机质。北羌塘坳陷发育多个大型富烃凹陷,上三叠统具有良好的生烃成藏条件,研究对深化羌塘油气地质认识,聚焦油气勘探目的层系具有重要地质意义。

关键词：羌塘盆地上三叠统层序沉积模式成藏模式

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产后胎盘残留植入磁共振成像的诊断评价与临床意义

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临床医药实践 2021年第7期30卷 523-525页

作者：符福文张杰梁敏群阎光辉阳春市人民医院广东阳春529600

目的:探讨产后胎盘残留植入磁共振成像(MRI)的诊断评价与临床意义。方法:选取2018年8月—2020年8月17例产后胎盘残留患者临床资料进行分析,根据MRI平扫和增强扫描结果,对残留胎盘大小、子宫肌层受累程度、强化特点、T1WI及T2WI信号特征... 详细信息

目的:探讨产后胎盘残留植入磁共振成像(MRI)的诊断评价与临床意义。方法:选取2018年8月—2020年8月17例产后胎盘残留患者临床资料进行分析,根据MRI平扫和增强扫描结果,对残留胎盘大小、子宫肌层受累程度、强化特点、T1WI及T2WI信号特征等指标进行分析。结果:5例正常胎盘残留可见子宫结合带连续、光滑且均匀;5例胎盘残留粘连可见子宫肌层受压变薄,子宫结合带中断、模糊;7例胎盘残留植入可见子宫肌层局限性变薄,且胎盘组织以结节形式侵入肌层。MRI可较为清晰地显示胎盘组织残留部分大小,最小为34.8 mm×28.7 mm×34.2 mm,最大为98.5 mm×67.4 mm×128.4 mm;T1WI高信号8例,等信号7例,T2WI高信号11例,等信号6例。增强扫描可见胎盘有明显强化。胎盘附着处子宫肌层厚度为(4.2±2.1)mm,显著薄于对侧子宫壁厚度[(15.1±8.4)mm]。结论:使用西门子ESSENZA 1.5MRI机对产后胎盘残留病例进行分析,能够客观评价胎盘形态,对附着处和侧壁子宫肌层的厚度、与残留胎盘组织关系能够较为清晰地显示,对胎盘残留的诊断和评价有重要意义,为胎盘残留的早期诊断和治疗提供依据,有利于改善预后。

关键词：胎盘磁共振成像子宫肌层滞留

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100km Optical Chirp Chain BOTDA with Spatial Resolution of 4m

100km Optical Chirp Chain BOTDA with Spatial Resolution of 4...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Guangzhe Wu Bozhong Li Ying Wang Can Li Li Deng Xiaomeng Xia He Lu Wei Jin Qian Wang fuwen Bai Chao Ma Xinyan Zhou Hanlin Lei Chao Hu Liwei Huang Liyan zhang Biao Shui Hongyan Zhou Jun Wu State Grid Information & Telecommunication Branch Beijing China Stata Key Laboratory of Optical Fibre and Cable Manufacture Technology Yangtze Optical Fibre and Cable Joint Stock Limited Company Wuhan China Hubei Optics Valley Laboratory Wuhan China

We proposed OCC-BOTDA using pattern recognition algorithm and differential pulse-width pair technique, which can improve the spatial resolution and sensing range effectively. A spatial resolution of 4m is achieved wit... 详细信息

关键词： Optical fibers Optical fiber sensors Chirp Asia Scattering Optical fiber communication Pattern recognition

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The role of den quality in giant panda conservation

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BIOLOGICAL CONSERVATION 2019年 231卷 189-196页

作者： Wei, Wei Swaisgood, Ronald R. Owen, Megan A. Pilfold, Nicholas W. Han, Han Hong, Mingsheng Zhou, Hong Wei, fuwen Nie, Yonggang zhang, Zejun China West Normal Univ Key Lab Southwest China Wildlife Resources Conser Minist Educ 1 Shida Rd Nanchong 637009 Peoples R China San Diego Zoo Global Inst Conservat Res 15600 San Pasqual Valley Rd Escondido CA 92027 USA Chinese Acad Sci Inst Zool CAS Key Lab Anim Ecol & Conservat Biol 1 Beichenxi Rd Beijing 100101 Peoples R China Chinese Acad Sci Ctr Excellence Anim Evolut & Genet Kunming 650223 Yunnan Peoples R China

Small features in ecological systems are often underrepresented in conservation monitoring, management and policy. Tree cavities and other forms of refuge play disproportionately large ecological roles due to their importance for shelter and rearing vulnerable offspring. Giant panda (Ailuropoda melanoleuca) cubs are highly altricial, and dependent on dens. In Fengtongzai-a reserve with cavity-containing old growth forest-we measured 19 structural and microhabitat variables in potential tree dens. We also established data loggers in rock cavities in Foping Nature Reserve (which due to logging does not contain old growth) and tree cavities in Fengtongzai to monitor temperature and humidity inside and outside dens to evaluate microclimatic buffering. Fengtongzai pandas selected tree dens that were better concealed, with large interiors and entrances but smaller entrance to interior ratios. Microclimate inside dens differed dramatically from ambient conditions outside: in cold weather dens were warmer, in hot weather dens were cooler, dens were less humid and dens had more stable microclimates. Dens used by maternal pandas were warmer, drier and less variable than tree and rock cavities that were not used. Tree dens showed better capacity to buffer against extremes of temperature and humidity than did cave dens. Our findings have important conservation implications, including the value of den sites and the need for better monitoring and management. Specifically, management practices that preserve large old trees may increase carrying capacity and any experimentation with artificial dens as a conservation intervention should reference our findings on structural and microclimatic characteristics of preferred den sites.

关键词： Cavity-dependent species Deforestation Denning ecology Forest management Microclimatic buffering Thermal habitat

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2021年湖南省学校诺如病毒感染暴发疫情流行病学分析

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实用预防医学 2023年第8期30卷 918-921页

作者：岳文芳段红英刘富强张斯钰蔡富文夏梦芝颜洁湖南省疾病预防控制中心湖南长沙410005

目的探讨2021年湖南省学校报告的15起诺如病毒感染暴发的流行病学特征,为制定预防控制策略提供科学依据。方法收集2021年1月1日—12月31日湖南省通过“突发公共卫生事件管理信息系统”中报告的学校诺如病毒感染暴发疫情资料,应用描述性... 详细信息

目的探讨2021年湖南省学校报告的15起诺如病毒感染暴发的流行病学特征,为制定预防控制策略提供科学依据。方法收集2021年1月1日—12月31日湖南省通过“突发公共卫生事件管理信息系统”中报告的学校诺如病毒感染暴发疫情资料,应用描述性流行病学方法进行分析。结果2021年湖南省报告学校诺如病毒感染暴发疫情15起,报告病例711例,罹患率为1.70%;主要发生在小学和初中(均为5起),其次为高中(3起);均发生在冬春季(3—4月和12—1月)。疫情传播途径主要为人传人(10起),经水传播(4起)和食物传播(1起)引起的疫情较少;疫情持续时间与疫情报告及时性(r=0.535,P<0.05)、单起疫情发病人数(r=0.809,P<0.001)呈显著或极显著正相关。人传人与经水传播差异有统计学意义(χ^(2)=128.32,P<0.001);人传人与经食物传播差异有统计学意义(χ^(2)=16.50,P<0.001);而经水传播与经食物传播差异无统计学意义(χ^(2)=2.58,P>0.05)。对15起暴发疫情病毒分型,其中8起由GII型诺如病毒引起,占53.33%。结论2021年湖南省学校诺如病毒感染暴发疫情主要发生在小学及初中;传播途径多为人传人。

关键词：学校诺如病毒暴发流行特征

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Novel Optical Fibers Assisting Electric Telecommunication Network Construction

Novel Optical Fibers Assisting Electric Telecommunication Ne...

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Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Guangzhe Wu Bozhong Li Li Deng Xiaomeng Xia He Lu Wei Jin Qian Wang Ying Wang Can Li fuwen Bai Hanlin Lei Xinyan Zhou Liwei Huang Chao Hu Liyan zhang Biao Shui Hongyan Zhou Jun Wu State Grid Information & Telecommunication Branch Beijing China State Key Laboratory of Optical Fibre and Cable Manufacture Technology Yangtze Optical Fibre and Cable Joint Stock Limited Company Wuhan China Hubei Optics Valley Laboratory Wuhan China

G.654.E fiber can provide a new solution for ultra-long distance transmission for power backbone communication network. 200μm G.657.A1 fiber can increase the fiber number of OPGW in power access communication network.

关键词： Optical fibers Optical fiber losses Optical fiber cables Optical attenuators Optical fiber networks Reliability engineering Communication networks

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