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Chinese Journal of Aeronautics 2024年第4期37卷 421-435页

作者： shihao xu Changzhu WEI Litao ZHANG Rongjun MU School of Astronautics Harbin Institute of TechnologyHarbin 150001China Beijing Institute of Control&Electronics Technology Beijing 100038China

This paper develops a novel Neural Network(NN)-based adaptive nonsingular practical predefined-time controller for the hypersonic morphing aircraft subject to actuator faults. Firstly, a novel Lyapunov criterion of practical predefined-time stability is established. Following the proposed criterion, a tangent function based nonsingular predefined-time sliding manifold and the control strategy are developed. Secondly, the radial basis function NN with a low-complexity adaptation mechanism is incorporated into the controller to tackle the actuator faults and uncertainties. Thirdly, rigorous theoretical proof reveals that the attitude tracking errors can converge to a small region around the origin within a predefined time, while all signals in the closed-loop system remain bounded. Finally, numerical simulation results are presented to verify the effectiveness and improved performance of the proposed control scheme.

关键词： Hypersonic morphing aircraft(HMA) Neural network(NN) Adaptive control Practical predefined-time control Fault-tolerant control

Polyimide covalent organic frameworks as efficient solid-state Li^(+) electrolytes

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Science China Chemistry 2024年第5期67卷 1647-1652页

作者： xu Liu Shi Wang Siqi Liu Chengfang Liu Xiangchun Li Jian Wu Dazhi Li shihao xu Chongyang Liu Wen-Yong Lai State Key Laboratory of Organic Electronics and Information Displays(SKLOEID) Institute of Advanced Materials(IAM)School of Chemistry and Life SciencesNanjing University of Posts&TelecommunicationsNanjing 210023China

Covalent organic frameworks(COFs) are attractive porous crystalline materials with extremely high stability, easy functionalization, and open channels, which are expected to be unique ion conductors/transporters in lithium ion batteries(LIBs). Despite recent advances, low ion conductivity and low transference number, resulting in low charging/discharging rate, low energy density, and short battery life, are the main issues that limit their direct application as solid electrolytes in LIBs. Here, we designed and synthesized a novel polyimide COF, namely, TAPA-PDI-COF, with abundant C=O groups, which has been successfully employed as high-performance solid electrolytes by doping TAPA-PDI-COF and succinonitrile(SN). Both the well-defined nanochannels of COFs and SN confined in the well-aligned channels restricted the free migration of anions, while C=O on COFs and CN groups of SN enhanced Li^(+) transport, thus achieving a high ion conductivity of 0.102 m S cm^(-1)at 80 °C and a high lithium-ion transference number of 0.855 at room temperature. According to density functional theory(DFT)calculations, Li-ion migration mainly adopted in-plane transport rather than the axial pathway, which may be due to the shorter hopping distances in the planar pathway. The results suggest an effective strategy for the design and development of all-solidstate ionic conductors for achieving high-performance LIBs.

关键词： lithium ion batteries(LIBs) covalent organic frameworks(COFs) solid-state ion conductors solid-state electrolytes ion conductivity

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超大断面浅埋软弱围岩市政隧道施工分析

科学技术创新 2024年第11期 125-128页

作者：许世豪中亿丰建设集团股份有限公司江苏苏州

随着市政道路工程逐渐完善,隧道断面不断增大,常面临超大断面浅埋软弱围岩的施工工况,对隧道施工提出更高的要求。本文经过对常见施工方法的分析,结合某工程项目对隧道施工方法进行详细阐述,通过建立双侧壁导坑法模型以及交叉中隔壁法模... 详细信息

随着市政道路工程逐渐完善,隧道断面不断增大,常面临超大断面浅埋软弱围岩的施工工况,对隧道施工提出更高的要求。本文经过对常见施工方法的分析,结合某工程项目对隧道施工方法进行详细阐述,通过建立双侧壁导坑法模型以及交叉中隔壁法模型,对两种工法进行比对,关注围岩位移的监测,控制支护变形以及地面沉降等问题,选择最佳施工工法。

关键词：超大断面软弱围岩市政隧道施工方案

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非小细胞肺癌免疫治疗的研究进展

转化医学杂志 2024年第2期13卷 284-287页

作者：徐世豪钱俊昆明医科大学附属德宏医院德宏州人民医院心胸外科云南德宏678400

非小细胞肺癌(NSCLC)是具有高发病率和病死率的恶性肿瘤。尽管化疗和分子靶向治疗不断优化,但晚期NSCLC患者的5年生存率仍较低。目前,免疫检查点抑制剂治疗在抗肿瘤领域中取得了重大突破,特别是程序性死亡受体-1/程序性死亡配体-1抑制... 详细信息

非小细胞肺癌(NSCLC)是具有高发病率和病死率的恶性肿瘤。尽管化疗和分子靶向治疗不断优化,但晚期NSCLC患者的5年生存率仍较低。目前,免疫检查点抑制剂治疗在抗肿瘤领域中取得了重大突破,特别是程序性死亡受体-1/程序性死亡配体-1抑制剂治疗被认为是NSCLC治疗的主要手段。本文就NSCLC的免疫治疗研究现状及相关问题进行综述。

关键词：肺肿瘤癌非小细胞肺免疫治疗靶向治疗程序性死亡受体-1 程序性死亡配体-1 免疫检查点抑制剂综述

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一种简化的高温热管启动模型

原子能科学技术 2024年第1期58卷 84-92页

作者：王政苟军利徐世浩单建强西安交通大学核科学与技术学院陕西西安710049

热管堆具有体积小、结构紧凑、功率密度高和固有安全性好等优点,被认为是深空和深海任务中最有前途的候选之一。为了研究其启动特性,建立兼顾计算精度及求解效率的热管启动模型至关重要。本文在充分考虑吸液芯区工质的熔化及气液界面处... 详细信息

热管堆具有体积小、结构紧凑、功率密度高和固有安全性好等优点,被认为是深空和深海任务中最有前途的候选之一。为了研究其启动特性,建立兼顾计算精度及求解效率的热管启动模型至关重要。本文在充分考虑吸液芯区工质的熔化及气液界面处的蒸发和冷凝现象的基础上,建立了基于二维导热的热管壁和吸液芯区热阻网络模型。对于蒸汽区,基于尘气模型(DGM),研究分析了两种不同模拟方式的求解精度和计算效率。通过对不同碱金属热管实验的模拟,验证了模型的准确性。结果表明,模型能较好地模拟高温热管的启动特性,简化的等效热阻模型具有更高的计算效率,其更适合于热管堆系统的启动特性模拟。

关键词：热管堆启动特性高温热管等效热阻模型

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Non-contact optical characterization of negative pressure in hydrogel voids and microchannels

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Frontiers of Optoelectronics 2022年第1期15卷 113-120页

作者： shihao xu Xiaowei Liu Zehua Yu Kang Liu MOE Key Laboratory of Hydrodynamic Transients School of Power and Mechanical EngineeringWuhan UniversityWuhan 430072China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

Negative pressure in water under tension,as a thermodynamic non-equilibrium state,has facilitated the emergence of inno-vative technologies on microfluidics,desalination,and thermal ***,the lack of a simple and accurate method to measure negative pressure hinders further in-depth understanding of the properties of water in such a *** this work,we propose a non-contact optical method to quantify the negative pressure in micron-sized water voids of a hydrogel film based on the microscale mechanical deformation of the hydrogel *** tested three groups of hydrogel samples with different negative pressure inside,and the obtained results fit well with the theoretical ***,we demonstrated that this method can characterize the distribution of negative pressure,and can thus provide the possibility of investigation of the flow behavior of water in negative *** results prove this technique to be a promising approach to characterization of water under tension and for investigation of its properties under negative pressure.

关键词： Hydrogel Negative pressure Non-contact Optical

经颅磁刺激疗法治疗孤独症谱系语言障碍患儿的效果

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中国民康医学 2024年第2期36卷 74-76,90页

作者：应晓瑞朱青许诗浩商丘市第一人民医院康复科河南商丘476000

目的:观察经颅磁刺激疗法治疗孤独症谱系语言障碍患儿的效果。方法:选取2019年3月至2021年11月该院收治的81例孤独症谱系语言障碍患儿进行前瞻性研究,采用随机数字表法分为观察组(41例)和对照组(40例)。对照组给予语言刺激联合心理干预... 详细信息

目的:观察经颅磁刺激疗法治疗孤独症谱系语言障碍患儿的效果。方法:选取2019年3月至2021年11月该院收治的81例孤独症谱系语言障碍患儿进行前瞻性研究,采用随机数字表法分为观察组(41例)和对照组(40例)。对照组给予语言刺激联合心理干预治疗,观察组在对照组基础上给予经颅磁刺激疗法,比较两组治疗前后神经因子指标水平、发育指标和沟通能力评分。结果:治疗后,观察组睫状神经营养因子、胶质细胞源性神经营养因子、脑源性神经营养因子及重神经生长因子水平均高于对照组,动作能、应人能、语言能、应物能及发育商评分均高于对照组,引发沟通、对他人反应及交谈技巧评分均高于对照组,差异均有统计学意义(P<0.05)。结论:在语言刺激联合心理干预治疗基础上给予经颅磁刺激疗法治疗孤独症谱系语言障碍患儿,可提高神经因子指标水平、发育指标和沟通能力评分,其效果优于单纯语言刺激联合心理干预治疗。

关键词：经颅磁刺激疗法语言刺激心理干预孤独症谱系语言障碍神经因子发育沟通能力

城乡中国视角下农民住房保障路径优化研究——以浙江诸暨为例

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世界农业 2024年第7期 111-121页

作者：徐世豪李哲敏王玉庭中国农业科学院农业信息研究所北京100081 中国农业科学院研究生院北京100081

住房是群众安身立命之所,保障农民居住权益关系国计民生。本文基于城乡中国的视角,在分析由乡土中国向城乡中国转型引发的农民住房需求分化基础上,剖析浙江诸暨围绕农民住房保障所开展的实践探索及其成效,提出城乡中国阶段农民住房保障... 详细信息

住房是群众安身立命之所,保障农民居住权益关系国计民生。本文基于城乡中国的视角,在分析由乡土中国向城乡中国转型引发的农民住房需求分化基础上,剖析浙江诸暨围绕农民住房保障所开展的实践探索及其成效,提出城乡中国阶段农民住房保障的优化路径,进而为其他正处于城乡中国转型阶段的地区提供实践参考。研究发现:一是随着城乡中国转型,农民住房需求在原有宅基地分配需求的基础上增加了改善性住房、城乡间可进可退的住房保障、城乡衔接的住房保障等多元需求;二是浙江诸暨面对城乡中国转型所带来的农民住房需求分化,结合宅基地制度改革,通过优化宅基地分配、推行多户共建、建设农村保障房等方式,初步构建了适应城乡中国阶段的农民住房保障路径;三是各地可从完善农民居住权益实现方式、建立健全城乡融合的住房保障体系、构建宅基地市场化配置机制等方面着手,结合宅基地制度改革,持续优化农民住房保障路径。

关键词：城乡中国宅基地制度改革住房保障路径优化

Rare-earth ions coordination enhanced ratiometric fluorescent sensing platform for quantitative visual analysis of antibiotic residues in real samples

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Chinese Chemical Letters 2023年第6期34卷 278-281页

作者： shihao xu Lingfei Li Dan Lin Liang Yang Zhenyang Wang Changlong Jiang Institute of Solid State Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China Key Laboratory of Photovoltaic and Energy Conservation Materials Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China

Levofloxacin(LVFX)as a representative drug of quinolone antibiotics is widely used in clinical,and its residues enriched in water bodies and sideline products seriously damage human *** is imperative to develop a real-time/on-site sensing method for monitoring residual ***,we report a portable sensing platform by utilizing a composite fluorescent nanoprobe constructed by the cerium ions(Ce^(3+))coordination functionalized Cd Te quantum dots(QDs)for the visual and quantitative detection of LVFX *** fluorescent probe provides a distinct color variation from red to green,which shows a good linear relationship to LVFX residues concentrations in the range of 0-6.0μmol/L with a sensitive limit of detection(LOD)of 16.3 nmol/*** smartphone platform with Color Analyzer App installed,which could accomplish quantified detection of LVFX in water,milk,and raw pork with a LOD of 27.9nmol/*** facile sensing method we proposed realizes rapid visualization of antibiotics residual in the environment and provides a practical application pathway in food safety and human health.

关键词： Rare-earth ions Ratiometric fluorescence probe Smartphone sensing platform Quantitative detection Levofloxacin

Redox-active conjugated microporous polymers as electron-accepting organic pseudocapacitor electrode materials for flexible energy storage

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Science China Chemistry 2022年第9期65卷 1767-1774页

作者： xu Liu Gengzhi Sun Yujiao Gong Cheng-Fang Liu Shi Wang shihao xu xuanli Yang Lei Yang Wen-Yong Lai State Key Laboratory of Organic Electronics and Information Displays Institute of Advanced MaterialsNanjing University of Posts&TelecommunicationsNanjing 210023China Key Laboratory of Flexible Electronics&Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 211816China Frontiers Science Center for Flexible Electronics Key Laboratory of Flexible Electronics of Ministry of Industry and Information TechnologyNorthwestern Polytechnical UniversityXi’an 710072China

Efficient energy storage devices,***,are being intensively pursued to address the environmental and energy *** high-performance pseudocapacitors are based on inorganic materials,while organic materials with broader synthetic tunability have attracted increasing *** recent progress,electron-deficient(n-type)organic pseudocapacitive materials for flexible energy storage are highly demanded yet remain largely *** a novel set of n-type perylene diimide(PDI)based conjugated microporous polymers(CMPs),namely,CMP-1,CMP-2 and CMP-3,have been created to integrate excellent desirable characteristics as organic pseudocapacitor electrode materials for flexible energy *** light of electron-accepting redox-active sites,hierarchically porous structures,as well as amide-linked networks,the PDI-CMPs electrodes displayed n-type pseudocapacitive behaviors with high capacity(139-205 F g^(-1)at 0.5 A g^(-1)),wide and negative biases(-1.0 to 0 V ***/AgCl),and long cycling ***-3 consisting of tetraphenylmethane three-dimensional(3D)building block and PDI units demonstrates not only higher capacitance but also better performance stability because of the higher specific surface area and faster diffusion kinetics as compared to its counterpart *** supercapacitors(SCs)based on CMP-3 and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)(PEDOT/PSS)exhibited wider potential window(1.8 V)and higher capacitance(17.4 m F cm^(-2))compared with symmetric SCs based on PEDOT/PSS ***,CMP-3 also demonstrates attractive potentials as the anode for rechargeable Li-ion *** study sheds light on the fundamental understanding of the key structural parameters that determine their electrochemical and transport properties,thus opening a new door for the rational design of efficient and stable n-type organic electrode materials for flexible energy storage applications.

关键词： flexible energy storage organic pseudocapacitors conjugated microporous polymers n-type electrode materials supercapacitors