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A decouple-decomposition noise analysis model for closed-loop mode-localized tilt sensors

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Microsystems & Nanoengineering 2023年第6期9卷 297-307页

作者： Kunfeng Wang XingYin Xiong Zheng Wang liangbo Ma BoWen Wang WuHao Yang Xiaorui Bie zhitian li XuDong Zou The State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijingChina Ming Hsieh Department of Electrical and Computer Engineering University of Southern CaliforniaLos AngelesCAUSA Shangdong Key Laboratory of Low-altitude Airspace Surveillance Network Technology QiLu Aerospace Information Research InstituteJinanChina

The development of mode-localized sensors based on amplitude output metrics has attracted increasing attention in recent years due to the potential of such sensors for high sensitivity and ***-localization phenomena leverage the interaction between multiple coupled resonant modes to achieve enhanced performance,providing a promising solution to overcome the limitations of traditional sensing *** noise plays a key role in determining the resolution of mode-localized sensors,as the output metric is derived from the measured AR(amplitude ratio)within the weakly coupled resonator ***,the amplitude noise originating from the weakly coupled resonator's closed-loop circuit has not yet been fully *** paper presents a decouple-decomposition(DD)noise analysis model,which is applied to achieve high resolution in a mode-localized tilt sensor based on a weakly coupled resonator closed-loop *** DD noise model separates the weakly coupled resonators using the decoupling method considering the nonlinearity of the *** integrating the decoupled weakly coupled resonators,the model decomposes the weakly coupled resonator's closed-loop circuit into distinct paths for amplitude and phase noise *** DD noise model reveals noise effects at various circuit nodes and models the system noise in the closed-loop circuit of the weakly coupled ***/Simulink simulations verify the model's accuracy when compared to theoretical *** the optimal operating point,the mode-localized tilt sensor achieves an input-referred instability of 3.91×10^(-4°)and an input-referred AR of PSD of 2.01×10^(-4°)⁄√Hz using the closed-loop noise *** model is also applicable to other varieties of mode-localized sensors.

关键词： weakly couple overcome

Novel nondelay-based reservoir computing with a single micromechanical nonlinear resonator for high-efficiency information processing

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Microsystems & Nanoengineering 2021年第5期7卷 71-81页

作者： Jie Sun Wuhao Yang Tianyi Zheng Xingyin Xiong Yunfei liu Zheng Wang zhitian li Xudong Zouu The State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijingChina School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of SciencesBeijingChina QILU Aerospace Information Research Institute JinanChina

Reservoir computing is a potential neuromorphic paradigm for promoting future disruptive applications in the era of the Internet of Things,owing to its well-known low training cost and compatibility with *** has been successfully implemented by injecting an input signal into a spatially extended reservoir of nonlinear nodes or a temporally extended reservoir of a delayed feedback system to perform temporal information *** we propose a novel nondelay-based reservoir computer using only a single micromechanical resonator with hybrid nonlinear dynamics that removes the usually required delayed feedback *** hybrid nonlinear dynamics of the resonator comprise a transient nonlinear response,and a Duffing nonlinear response is first used for reservoir *** to the richness of this nonlinearity,the usually required delayed feedback loop can be *** further simplify and improve the efficiency of reservoir computing,a self-masking process is utilized in our novel reservoir ***,we numerically and experimentally demonstrate its excellent performance,and our system achieves a high recognition accuracy of 93%on a handwritten digit recognition benchmark and a normalized mean square error of 0.051 in a nonlinear autoregressive moving average task,which reveals its memory ***,it also achieves 97.17±1%accuracy on an actual human motion gesture classification task constructed from a six-axis IMU *** remarkable results verify the feasibility of our system and open up a new pathway for the hardware implementation of reservoir computing.

关键词： nonlinear delay remove

A flame-retardant binder with high polysulfide affinity for safe and stable lithium–sulfur batteries

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Science China Chemistry 2024年第3期67卷 1028-1036页

作者： Guowei Yu Guofeng Ye Cheng Wang Chenyang Wang Zhaoyun Wang Pu Hu Yu li Xi-Xi Feng Shuang-Jie Tan Min Yan Sen Xin zhitian liu Hubei Key Laboratory of Plasma Chemistry and Advanced Materials Hubei Engineering Technology Research Center of Optoelectronic and New Energy MaterialsSchool of Materials Science and EngineeringWuhan Institute of TechnologyWuhan 430205China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

lithium-sulfur(li-S) batteries have shown promises for the next-generation, high-energy electrochemical storage, yet are hindered by rapid performance decay due to the polysulfide shuttle in the cathode and safety concerns about potential thermal runaway. To address the above challenges, herein, we show a flame-retardant cathode binder that simultaneously improves the electrochemical stability and safety of batteries. The combination of soft and hard segments in the polymer framework of binders allows high flexibility and mechanical strength for adapting to the drastic volume change during the li(de)intercalation of the S cathode. The binder contains a large number of polar groups, which show the high affinity to polysulfides so that they help to anchor active S species at the cathode. These polar groups also help to regulate and facilitate the li-ion transport, promoting the kinetics of polysulfide conversion reaction. The binder contains abundant phosphine oxide groups, which, in the case of battery's thermal runaway, decompose and release PO· radicals to quench the combustion reactions and stop the fire. Consequently, li-S batteries using the new cathode binder show the improved electrochemical performance, including a low-capacity decay of 0.046% per cycle for 800 cycles at 1 C and favorable rate capabilities of up to 3 C. This work offers new insights on the practical realization of high-energy rechargeable batteries with stable storage electrochemistry and high safety.

关键词： lithium–sulfur battery polymer binder polysulfide affinity flame retardancy

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外资进入广播影视文化产业蠡说

中国广播电视学刊 2005年第2期 27-28页

作者：李稚田北京师范大学艺术与传媒学院

自2002年党的十六大召开以来,在文化产业中占举足轻重之位的广播电影电视,年年都会传来令人兴奋不已的好消息.2004年,最重要的好消息之一应属广电总局连续颁发的第43、第44号两个有关资本运作的重要法令.

关键词：广播产业影视产业文化产业外资资本运作

武术运动动作三维图像非显著性区域自适应增强系统设计

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现代电子技术 2018年第13期41卷 56-60页

作者：李志田广西师范学院师园学院广西南宁530226

针对传统增强系统一直存在效率低、效果不佳的问题,提出基于中心环绕法优化Retinex增强模型的武术运动动作三维图像非显著性区域自适应增强系统设计。在图像空间域上,通过均值滤波法对武术运动动作三维图像进行去噪处理,采用梯度算子求... 详细信息

针对传统增强系统一直存在效率低、效果不佳的问题,提出基于中心环绕法优化Retinex增强模型的武术运动动作三维图像非显著性区域自适应增强系统设计。在图像空间域上,通过均值滤波法对武术运动动作三维图像进行去噪处理,采用梯度算子求出能够反映武术运动动作三维图像的梯度向量,并在图像的空间域上采用微分算子对武术运动动作三维图像进行锐化处理。以此为基础,采用SSR算法进行求解、加权,获取武术运动动作三维图像中准确的非显著性区域,引入中心环绕法对武术运动动作三维图像进行估计,引入Retinex增强模型对武术运动动作三维图像非显著性区域进行自适应增强处理。实验结果表明,采用该设计系统的增强效率、增强效果均要优于传统增强系统,具有一定优势。

关键词：武术运动动作三维图像非显著性区域自适应增强系统均值滤波

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文山西畴“女子太阳节”文化密码初探

文山学院学报 2016年第1期29卷 14-17页

作者：李稚田北京师范大学艺术与传媒学院北京100875

西畴女子太阳节的神话具有很高价值,它所蕴含的女性祭祀仪式,作为"文化遗留物",具有更高的文化价值。它补上了母系氏族婚制向父系氏族婚制进化的一个文化链环,是宝贵的"文化遗存"。

关键词：云南西畴女子太阳节文化遗留物婚制进化

英国基础教育数字化:基于国家战略下的多层次全方位推进

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基础教育参考 2023年第10期 34-42页

作者：李志甜马早明华南师范大学教育科学学院广州510631 国家教材建设重点研究基地华南师范大学港澳台教材综合研究基地

20世纪60年代以来,英国不断将信息化、数字化运用到教育中。在英国数字化教育和教育技术的发展过程中,英国官方尤其是英国教育部从政策制定、经费划拨到效果评估、实施推进、商业运营、市场开发等各方面给予支持和保障,使英国中小学的... 详细信息

20世纪60年代以来,英国不断将信息化、数字化运用到教育中。在英国数字化教育和教育技术的发展过程中,英国官方尤其是英国教育部从政策制定、经费划拨到效果评估、实施推进、商业运营、市场开发等各方面给予支持和保障,使英国中小学的师生和管理者在数字化教育的落地方面获得了自主权,也使英国基础教育实施者和管理者之间沟通交流的渠道畅通,更大程度上保障了英国数字化教育的成效。

关键词：英国教育数字化基础教育教育技术网络安全国家战略信息素养

创新·创意·创业:试论影视传媒专业的教育改革

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浙江传媒学院学报 2008年第5期15卷 52-54页

作者：李稚田北京师范大学艺术与传媒学院

文章提出新兴的普通高等院校影视专业深化教育改革的问题。认为要在全国建设创新型国家的大背景下,大力培养学生的创意与策划能力,并提升他们的创业意识,才能做大做强中国的影视产业和其他文化产业。

关键词：影视教育文化产业创新型国家创意创业

miR-29a靶向调控PDGFB促进非小细胞肺癌细胞凋亡

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基因组学与应用生物学 2020年第3期39卷 1301-1306页

作者：李维青姜福胜李志田张旭刚首都医科大学附属北京世纪坛医院北京100038

为了探究miR-29a对非小细胞肺癌细胞增殖和凋亡的影响及分子机制,本研究通过荧光定量PCR检测肺癌组织、癌旁组织、肺癌细胞以及人正常肺支气管上皮细胞BEAS-2B中miR-29a的表达,在肺癌A549转染miR-29a mimics后,使用荧光定量PCR和CCK-8... 详细信息

为了探究miR-29a对非小细胞肺癌细胞增殖和凋亡的影响及分子机制,本研究通过荧光定量PCR检测肺癌组织、癌旁组织、肺癌细胞以及人正常肺支气管上皮细胞BEAS-2B中miR-29a的表达,在肺癌A549转染miR-29a mimics后,使用荧光定量PCR和CCK-8法分别检测miR-29a的表达以及各组细胞的活力,使用流式细胞术检测A549细胞凋亡;通过荧光定量PCR检测肺癌组织、癌旁组织PDGFB m RNA的表达,采用Western blot检测PDGFB蛋白的表达;使用双荧光素酶报告基因检测miR-29a可能的靶基因;在肺癌A549细胞转染miR-29a mimics后继续转染PDGFB过表达质粒,通过qPCR和Western blotting分别检测PDGFB mRNA和蛋白的表达。结果表明,与癌旁组织相比,miR-29a在肺癌组织的表达显著下调(p<0.01),PDGFB在肺癌组织的表达显著增加(p<0.01);转染miR-29a mimics后,肺癌A549细胞中miR-29a表达显著增加(p<0.01);CCK-8法结果显示miR-29a mimics组A549肺癌细胞在24 h和48 h后细胞增值率较miR-NC对照组显著降低(p<0.01);流式细胞术结果显示miR-29a mimics组的细胞凋亡率较miR-NC对照组显著增加(p<0.01);与miR-NC+PDGFB 3’UTR WT组相比,miR-29a mimics+PDGFB 3’UTR WT组的荧光强度显著降低(p<0.01);荧光定量PCR和Western blotting显示miR-29a mimics+PDGFB组PDGFB m RNA和蛋白表达量与miR-29a mimics+vector组相比显著增加(p<0.01)。本研究结果表明miR-29a在肺癌组织和肺癌细胞株中低表达,及抑制PDGFB的表达并且促进肺癌细胞凋亡。

关键词： miR-29a 肺癌细胞 PDGFB 细胞凋亡