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对近年全国卷高考数学试题的研究及其启示

河北理科教学研究 2019年第4期 47-51,60页

作者：卢燕霞童其林福建省龙岩市教育研究科学院 364000 福建省龙岩市永定区城关中学 360100

课标全国卷的试卷结构和题型具有一定的稳定性和连续性,对近9年全国高考理科数学Ⅰ卷客观题和主观题考查题型及考查频率进行统计和分析显示,课标全国卷的试卷结构和题型具有一定的创新性——"新"在试题形式,"新"在知识内容,"新"在解题... 详细信息

课标全国卷的试卷结构和题型具有一定的稳定性和连续性,对近9年全国高考理科数学Ⅰ卷客观题和主观题考查题型及考查频率进行统计和分析显示,课标全国卷的试卷结构和题型具有一定的创新性——"新"在试题形式,"新"在知识内容,"新"在解题方法或研究方法.得到的启示是:在教学过程中,要重视"四基"、夯实"四基";要深入研究历年高考真题,获得基本数学活动经验;利用典型例题提高解题水平;重视归纳总结,正思和反思等.

关键词： 2010-2018 高考数学研究启示

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三点共线的证明方法与运用

河北理科教学研究 2019年第1期 32-34页

作者：熊文进童其林福建省龙岩市永定区城关中学

三点共线的证明方法很多,具体运用时选择一种最简单的行之有效的方法是我们必须考虑的.平时教学时,要注意三点共线的证明方法的渗透,注意分散教学和集中教学.

关键词：三点共线解析几何立体几何平面向量证明方法

Stretchable Luminescent Perovskite‑Polymer Hydrogels for Visual‑Digital Wearable Strain Sensor Textiles

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Advanced Fiber Materials 2023年第5期5卷 1671-1684页

作者： Xinxin Li Long Chen Shuanglong Yuan Hua tong qilin Cheng Huidan Zeng Lei Wei Qichong Zhang Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore

The integration of a display function with wearable interactive sensors offers a promising way to synchronously detect physiological signals and visualize pressure/***,combining these two functions in a strain sensor textile is a longstanding challenge due to the physical separation of sensors and display ***,a water-stable luminescent perovskite hydrogel(emission band approximately 25 nm)is constructed by blending as-prepared CsPbBr_(3)@PbBr(OH)with stretchable polyacrylamide(PAM)*** facile introduction of CsPbBr_(3)@PbBr(OH)endows the hydrogels with excellent optical properties and a high mechanical strength of 51.3 kPa at a fracture strain of 740%.Interestingly,the resulting hydrogels retain bright green fluorescence under conditions including water,ultraviolet light,and extensive stretching(>700%).As a proof-of-concept,a novel wearable stretchable strain sensor textile based on these hydrogels is developed,and it displays visual-digital synergetic strain detection *** can perceive various motions on the human body in real time with electronic output signals from changes in resistance and simultaneously readable optical output signals,whether on land or *** work provides a meaningful guide to rationally design perovskite hydrogels and accelerates the development of wearable visual-digital strain sensor textiles.

关键词： Metal halide perovskites Stretchable luminescent hydrogels Strain sensor textiles Amphibious Visualdigital synergies

Boosting triplet self-trapped exciton emission in Te(IV)-doped Cs_(2)SnCl_(6) perovskite variants

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Nano Research 2021年第5期14卷 1551-1558页

作者： Ruosheng Zeng Kun Bai qilin Wei tong Chang Jun Yan Bao Ke Jialuo Huang Liushun Wang Weichang Zhou Sheng Cao Jialong Zhao Bingsuo Zou School of Physical Science and Technology MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and MaterialsGuangxi Key Laboratory of Processing for Non-ferrous Metals and Featured MaterialsGuangxi UniversityNanning530004China School of Materials Science and Engineering Guilin University of Electronic TechnologyGuilin541004China School of Physics and Electronics Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of Ministry of EducationKey Laboratory for Matter Microstructure and Function of Hunan ProvinceSynergetic Innovation Center for Quantum Effects and ApplicationHunan Normal UniversityChangsha410081China

Perovskite variants have attracted wide interest because of the lead-free nature and strong self-trapped exciton (STE) emission. Divalent Sn(II) in CsSnX3 perovskites is easily oxidized to tetravalent Sn(IV), and the resulted Cs2SnCl6 vacancy-ordered perovskite variant exhibits poor photoluminescence property although it has a direct band gap. Controllable doping is an effective strategy to regulate the optical properties of Cs2SnX6. Herein, combining the first principles calculation and spectral analysis, we attempted to understand the luminescence mechanism of Te4+-doped Cs2SnCl6 lead-free perovskite variants. The chemical potential and defect formation energy are calculated to confirm theoretically the feasible substitutability of tetravalent Te4+ ions in Cs2SnCl6 lattices for the Sn-site. Through analysis of the absorption, emission/excitation, and time-resolved photoluminescence (PL) spectroscopy, the intense green-yellow emission in Te4+:Cs2SnCl6 was considered to originate from the triplet Te(IV) ion 3P1→1S0 STE recombination. Temperature-dependent PL spectra demonstrated the strong electron-phonon coupling that inducing an evident lattice distortion to produce STEs. We further calculated the electronic band structure and molecular orbital levels to reveal the underlying photophysical process. These results will shed light on the doping modulated luminescence properties in stable lead-free Cs2MX6 vacancy-ordered perovskite variants and be helpful to understand the optical properties and physical processes of doped perovskite variants.

关键词： Cs_(2)SnCl_(6)perovskite variants equivalent ion doping self-trapped exciton(STE)emission electron-phonon coupling first principles calculation

Maternal zinc alleviates tert-butyl hydroperoxide-induced mitochondrial oxidative stress on embryonic development involving the activation of Nrf2/PGC-1αpathway

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Journal of Animal Science and Biotechnology 2023年第4期14卷 1730-1743页

作者： Liang Huang Wei Gao Xuri He tong Yuan Huaqi Zhang Xiufen Zhang Wenxuan Zheng qilin Wu Ju Liu Wence Wang Lin Yang Yongwen Zhu State Key Laboratory of Livestock and Poultry Breeding South China Agricultural UniversityGuangzhou 510000China tongren Polytechnic College Tongren 554000China Enping Long Industrial Co.Ltd Enping 529400China

Background Mitochondrial dysfunction induced by excessive mitochondrial reactive oxygen species(ROS)damages embryonic development and leads to growth *** The purpose of this study is to elucidate whether maternal zinc(Zn)exert protective effect on oxidative stress targeting mitochondrial function using an avian *** In ovo injected tert-butyl hydroperoxide(BHP)increases(P<0.05)hepatic mitochondrial ROS,malondialdehyde(MDA)and 8-hydroxy-2-deoxyguanosine(8-OHdG),and decreases(P<0.05)mitochondrial membrane potential(MMP),mitochondrial DNA(mtDNA)copy number and adenosine triphosphate(ATP)content,contributing to mitochondrial *** vivo and in vitro studies revealed that Zn addition enhances(P<0.05)ATP synthesis and metallothionein 4(MT4)content and expression as well as alleviates(P<0.05)the BHP-induced mitochondrial ROS generation,oxidative damage and dysfunction,exerting a protective effect on mitochondrial function by enhancing antioxidant capacity and upregulating the mRNA and protein expressions of Nrf2 and PGC-1α.Conclusions The present study provides a new way to protect offspring against oxidative damage by maternal Zn supplementation through the process of targeting mitochondria involving the activation of Nrf2/PGC-1αsignaling.

关键词： Embryonic development Maternal zinc Mitochondrial function Oxidative stress

Semi-global weighted output average tracking of discrete-time heterogeneous multi-agent systems subject to input saturation and external disturbances

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Control Theory and Technology 2023年第3期21卷 315-333页

作者： qilin Song Yuanlong Li Yijing Xie Zongli Lin Department of Automation Shanghai Jiao Tong UniversityShanghai 200240China Department of Electrical Engineering University of Texas at ArlingtonArlington 76019TXUSA Charles L.Brown Department of Electrical and Computer Engineering University of VirginiaCharlottesville 22904-4743VAUSA

In this paper,we revisit the semi-global weighted output average tracking problem for a discrete-time multi-agent system subject to input saturation and external *** multi-agent system consists of multiple heterogeneous linear systems as leader agents and multiple heterogeneous linear systems as follower *** design both the state feedback and output feedback control protocols for each follower *** particular,a distributed state observer is designed for each follower agent that estimates the state of each leader *** the output feedback case,state observer is also designed for each follower agent to estimate its own *** these estimates,we design low gain-based distributed control protocols,parameterized in a scalar low gain *** is shown that,for any bounded set of the initial conditions,these control protocols cause the follower agents to track the weighted average of the outputs of the leader agents as long as the value of the low gain parameter is tuned sufficiently *** results illustrate the validity of the theoretical results.

关键词： Distributed average tracking Input saturation Low gain feedback Heterogeneous multi-agent systems Output regulation

Amplitude-Integrated Electroencephalography Predicts Outcome in Patients with Coma After Acute Brain Injury

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Neuroscience Bulletin 2018年第4期34卷 639-646页

作者： Wendong You qilin Tang Xiang Wu Junfeng Feng Qing Mao Guoyi Gao Jiyao Jiang Department of Neurosurgery Ren Ji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200127China Shanghai Institute of Head Trauma Shanghai 200127China

Prognostication of coma patients after brain injury is important, yet challenging. In this study, we evaluated the predictive value of amplitude-integrated electroencephalography （aEEG） for neurological outcomes in coma patients. From January 2013 to January 2016, 128 coma patients after acute brain injury were prospectively enrolled and monitored with aEEG. The 6-month neurological outcome was evaluated using the Cerebral Performance Category Scale. aEEG monitoring commenced at a median of 7.5 days after coma onset. Continuous normal voltage predicted a good 6-month neurological outcome with a sensitivity of 93.6% and specificity of 85.2%. In contrast, continuous extremely low voltage, burst-suppression, or a flat tracing was correlated with poor 6-month neurological outcome with a sensitivity of 76.5% and specificity of 100%. In conclusion, aEEG is a promising predictor of 6-month neurological outcome for coma patients after acute brain injury.

关键词： Amplitude-integrated electroencephalography -Coma Acute brain injury Outcome

Accurate regulation of carbon skeletons bonded to Fe-N4 single atom nanozymes for efficient generation of reactive oxygen species

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Science China Chemistry 2024年

作者： Fuchun Nan qilin Wei tongtong Kou Yuxuan Zhao Lanbo Shen Dawei Li tong Chang Lingyun Wang Fangfang Lang William W.Yu School of Chemistry and Chemical Engineering Ministry of Education Key Laboratory of Special Functional Aggregated MaterialsShandong Key Laboratory of Advanced Organosilicon Materials and TechnologiesShandong University Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion Science Center for Material Creation and Energy ConversionShandong University Department of Urology Qilu Hospital of Shandong University Jinan Central Hospital Shandong First Medical University School of Integrated Circuits Shandong University Shandong Provincial Maternal and Child Health Care Hospital Qingdao University

Rational design of single atom nanozymes （SAzymes） could be achieved through the accurate configuration regulation of metal coordination sites,nevertheless,the un-defined carbon environment of traditional SAzymes synthesized by high-temperature pyrolysis makes it difficult to unveil the influence of carbon skeletons with enzyme mimicking activities of ***,we investigated the relationship between the carbon skeletons and the enzyme mimicking activities through the construction of a series of fullyπ-conjugated covalent organic polymer （COP）-based SAzymes with analogous *** experimental results and theoretical calculations demonstrated that carbon skeletons bonded to the Fe-N4catalytic sites strongly affect the enzyme mimicking activities of COP *** the number of benzene rings in carbon skeletons was 1,the COP SAzyme possessed much more remarkable oxidase （OXD） and peroxidase （POD） mimicking activities,and further reducing or increasing the benzene rings would dramatically inhibit the enzyme mimicking ***,the fantastic enzyme mimicking activity of COP-1 could be applied to colorimetric detection of biological molecules and degradation of *** results provide a new perspective for the rational fabrication of SAzymes with high catalytic efficiency.

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Serum level changes of inflammatory cytokines in patients with moderate to severe acne vulgaris treated with dual-wavelength laser

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Chinese Journal of Plastic and Reconstructive Surgery 2023年第2期5卷 47-52页

作者： Yang Liu qilin Sun Hui Xu Gang Ma Pinru Wu Department of Dermatology Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China Department of Laser and Aesthetic Medicine Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China Department of Plastic and Reconstructive Surgery Shanghai Ninth People’s HospitalShanghai Jiao Tong University School of MedicineShanghai 200011China

Background:Acne vulgaris(AV)is a common inflammatory skin *** various mechanisms have been indicated in the etiopathogenesis of AV,the exact pathophysiology remains *** lasers have been used to treat AV;however,the serum level changes of inflammatory cytokines after laser therapy have not been *** aimed to investigate the relationship between inflammatory changes and remission on the opposite side in patients with moderate to severe AV after treating half of the face with 595-and 1064-nm dualwavelength ***:In total,18 patients(9 male and 9 female)between 16 and 35 years of age with moderate to severe AV were evaluated in the *** severity was classified according to the Pillsbury grading system of *** were randomized to receive a series of two treatment sessions at intervals of 2 weeks and followed up at 2 weeks after the final treatment.A 3 mL blood sample was drawn from every subject each time,and serum levels of inflammatory cytokines such as interleukin(IL)-6,IL-8,and IL-22 were determined using enzyme-linked immunosorbent assay at baseline and 2 weeks after each *** was determined by a blinded assessment of photographs taken before and after the final ***:Inflammation was significantly reduced on both the treated and untreated sides,and symptoms of AV lesions were *** patients showed a significant increase in serum IL-22 levels after the first laser therapy,with no significant difference in serum IL-6 and IL-8 *** the second laser therapy,serum IL-6,IL-8,and IL-22 levels were significantly *** significant side effects such as bruising,edema,hyperpigmentation,hypopigmentation,or scarring were ***:Half-face treatment with 595-and 1064-nm dual-wavelength laser for moderate and severe AV showed a significant effect of full-face remission,which was associated with a gradual decrease in IL-6,IL-8,and IL-22 levels after half-fac

关键词： Acne vulgaris Dual-wavelength laser Inflammatory cytokines Serum