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数字赋能与智慧教育下数字测图课程教学探索与实践

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测绘工程 2025年第1期34卷 74-80页

作者：陈允芳刘尚国刘凤英山东科技大学测绘与空间信息学院山东青岛266590

数字赋能与智慧教育催生了基于富媒体资源的新形态教学,数字测图技术正由信息化测绘向智能化转型。文中梳理了数字测图系统硬软件配置、数据采集与处理模式,给出了其虚拟仿真实现流程;基于在线课程集群、虚拟仿真教学及技能竞赛需求,设... 详细信息

数字赋能与智慧教育催生了基于富媒体资源的新形态教学,数字测图技术正由信息化测绘向智能化转型。文中梳理了数字测图系统硬软件配置、数据采集与处理模式,给出了其虚拟仿真实现流程;基于在线课程集群、虚拟仿真教学及技能竞赛需求,设计了理虚实、线上线下、课内课外一体化新形态教学模式;最后定义了测绘专业素养与技能指标,以探讨智能化测绘下专业创新人才培养新标准。

关键词：数字赋能智慧教育富媒体新形态教学虚拟仿真数字素养与技能智能化测绘

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COF-derived Co nanoparticles@N-doped carbon electrocatalysts for high performance Zn-air batteries

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Chinese Journal of Chemical Engineering 2023年第11期63卷 43-50页

作者： Jie Wei Chengcai Zhao Ming Chen fengying liu Limin Zhao Hui Zhao Zhong-Yong Yuan School of Materials Science and Engineering Liaocheng UniversityLiaocheng 252000China College of Chemistry and Chemical Engineering Xinyang Normal UniversityXinyang 464000China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) School of Materials Science and EngineeringNankai UniversityTianjin 300350China

Precise modulation of the structure and composition of electrocatalysts is critical for promoting the kinetically sluggish process of oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Covalent organic frameworks(COF)offer a novel way to create highly efficient electrocatalysts due to their tunable composition,structure and surface ***,we report a high-efficiency bifunctional electrocatalyst comprising Co nanoparticles embedded within N-doped carbons(Co@NCs)for Zn-air batteries(ZABs).The Co@NC is yielded via the coordination of a triazine COF with Co-containing precursors and subsequent calcination under inert *** as-prepared Co@NC exhibits remarkable ORR/OER performance and great potential in rechargeable *** liquid ZAB constructed with Co@NC provides both high specific capacity and power ***,the ZAB exhibits a voltage gap of 0.8 V during discharge and charge cycles and high stability for 220 h compared to the Pt/C-assembled *** strategy for regulating electrocatalytic activities of COF-derived carbon materials could be expanded for creating various carbon catalysts.

关键词： COF Co@NC Composites Electrochemistry Catalysis Zn-air battery

SinoDuplex: An Improved Duplex Sequencing Approach to Detect Low-frequency Variants in Plasma cfDNA Samples

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Genomics, Proteomics & Bioinformatics 2020年第1期18卷 81-90页

作者： Yongzhe Ren Yang Zhang Dandan Wang fengying liu Ying Fu Shaohua Xiang Li Su Jiancheng Li Heng Dai Bingding Huang College of Big Data and Internet Shenzhen Technology UniversityShenzhen 518118China Department of Research and Development Sinotech Genomics Inc.Kanxing Road 3399Shanghai 201314China Department of Integrated Traditional and Western Medicine In Oncology The First Affiliated Hospital of Anhui Medical UniversityHefei 230022China Department of Radiation Oncology Fujian Medical University Cancer Hospital and Fujian Cancer HospitalFuzhou 350014China Institute of Synthetic Biology Shenzhen Institute of Advanced TechnologyChinese Academy of ScienceShenzhen 518005China

Accurate detection of low frequency mutations from plasma cell-free DNA in blood using targeted next generation sequencing technology has shown promising benefits in clinical *** sequencing technology is the most commonly used approach in liquid *** molecular identifiers are attached to each double-stranded DNA template,followed by production of low-error consensus sequences to detect low frequency ***,high sequencing costs have hindered application of this approach in clinical ***,we have developed an improved duplex sequencing approach called Sino Duplex,which utilizes a pool of adapters containing pre-defined barcode sequences to generate far fewer barcode combinations than with random sequences,and implemented a novel computational analysis algorithm to generate duplex consensus sequences more *** Duplex increased the output of duplex sequencing technology,making it more *** evaluated our approach using reference standard samples and cell-free DNA samples from lung cancer *** results showed that Sino Duplex has high sensitivity and specificity in detecting very low allele frequency *** source code for Sino Duplex is freely available at https://***/Sin Oncology/sinoduplex.

关键词： Next generation sequencing Liquid biopsy Circulating tumor DNA Duplex sequencing Low frequency variant

Homogenous Sn-doped K(Ta,Nb)O_(3) single crystals and its high piezoelectric response

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Journal of Materiomics 2022年第3期8卷 702-709页

作者： fengying liu Yuanyuan Zhang Limei Zheng Gang Tian Juan Du Le Zhao Xudong Chen Xuping Wang Minglei Zhao School of Physics Shandong UniversityJinan250100China Advanced Materials Institute Qilu University of Technology(Shandong Academy of Sciences)Jinan250014China College of Materials Science and Engineering Liaocheng UniversityLiaocheng252059China School of Electronic and Information Engineering Department of Physics Qilu University of Technology(Shandong Academy of Sciences)JinanShandong250353China

Perovskite K(Ta,Nb)O_(3)(KTN)single crystal has drawn great interests for its outstanding electro-optic performance and excellent piezoelectric ***,growth of compositionally uniform KTN single crystals has always been a great challenge for the great segregation difference between Nb and *** this work,we propose a thermal field optimization strategy to resolve this *** Sn doped KTN(Sn:KTN)single crystal with significantly reduced composition gradient(0.003 mol/mm,1/4 e1/8 of other KTN system),minimal TC variation(13℃)and excellent piezoelectric and dielectric response(d_(33)=373 pC/N andε^(T)_(33)=5206)has been successfully *** found that the functional properties of Sn:KTN were greatly affected by the near-room temperature tetragonal-cubic phase *** the intrinsic aspect,longitudinal lattice deformation becomes much easier,resulting in maximum piezoelectric(d^(*)_(33)),dielectric(ε^(T*)_(33)),elastic(s^(E*)_(33))and electromechanical coupling(k^(*)_(33))coefficients along polar direction[001]_(C).From the extrinsic aspect,both domain wall density and domain wall mobility are greatly improved for the reduced lattice distortion,which also contribute a lot to the functional *** work provides a simple and practical route for designing and growing high quality crystals,and more importantly,reveals the fundamental mechanism of the phase transitions/boundaries on the functional properties.

关键词： Low composition gradient High piezoelectric response PS extension/contraction T-C phase transition Sn:KTN

EXISTENCE OF MULTIPLE PERIODIC SOLUTIONS TO THREE-SPECIES DELAYED LOTKA-VOLTERRA MODEL WITH DISPERSION AND HARVESTING

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Annals of Differential Equations 2012年第2期28卷 234-241页

作者： fengying Wei , Juanfeng liu (College of Math. and Computer Science, Fuzhou University, Fuzhou 350108)

The positive periodic solutions to a three-species delayed Lotka-Volterra model with dispersion and harvesting terms are studied in this paper. By the coincidence degree theory, the sufficient conditions for existence... 详细信息

关键词： periodic solutions Lotka-Volterra system coincidence degree harve-sting

系统康复训练对全髋关节置换术患者功能恢复的影响

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中国综合临床 2007年第2期23卷 151-153页

作者：刘凤英承德医学院附属医院门诊部河北省承德市067000

目的评价全髋关节置换术（THA）患者进行系统康复训练俄乏果。方法86例THA患者随机分为实验组和对照组，每组43例。2组均给予常规治疗和护理，但实验组分阶段完成系统康复训练内容。于术前及术后第3周、第3、6及18个月进行Harris评分。... 详细信息

目的评价全髋关节置换术（THA）患者进行系统康复训练俄乏果。方法86例THA患者随机分为实验组和对照组，每组43例。2组均给予常规治疗和护理，但实验组分阶段完成系统康复训练内容。于术前及术后第3周、第3、6及18个月进行Harris评分。结果实验组和对照组术后Harris评分与术前比较差异具有显著性（P〈0．01）；实验组在术后第3及第6个月时Harris评分与对照组比较差异具有显著性（P〈0．05和P〈0.01）。结论系统康复训练是一项提高THA治疗效果的有效措施。

关键词：全髋关节置换康复训练 Harris评分

利用混合规则几何面的MMS激光扫描仪检校方法

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红外与激光工程 2020年第2期49卷 164-172页

作者：陈天恩王冬刘凤英山东科技大学测绘科学与工程学院山东青岛266590

提出了一种利用混合规则几何面进行车载移动测量系统(MMS)激光扫描仪外参数检校的方法。该方法利用现实环境中普遍存在的平面和圆柱面地物,结合平面和柱面可公式化的几何特征对激光点进行严密的数学方程式约束,通过非线性优化的方法精... 详细信息

提出了一种利用混合规则几何面进行车载移动测量系统(MMS)激光扫描仪外参数检校的方法。该方法利用现实环境中普遍存在的平面和圆柱面地物,结合平面和柱面可公式化的几何特征对激光点进行严密的数学方程式约束,通过非线性优化的方法精确求解激光扫描仪相对于MMS定位测姿POS系统的相对位置和姿态参数。实验结果表明:相对于只采用平面地物约束进行检校的方法,采用混合规则几何面联合约束检校的方法结果精度更高,距离残差中误差达到了0.006 m;同一车载平台、两套不同激光扫描仪系统检校后,点云叠合效果较好。该检校方法具有精度高、简便、快速、实用等优点,具有较强的工程应用价值。

关键词：车载移动测量系统激光扫描仪规则几何面外参数检校联合约束

High-pressure and high-tem-perature synthesis of MgB_2 and its superconductivity

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Chinese Science Bulletin 2001年第22期46卷 1932-1934页

作者： ZHU Jialin, LI Shaochun, YU Richeng, LI fengying liu Zhengxing & JIN ChangqingLaboratory for Extreme Condition Physics, Institute of Physics, Center for Condensed Matter Physcis and Beijing High Pressure Research Center, Chinese Academy of Sciences, Beijing 100080, China Laboratory for Extreme Condition Physics Institute of Physics Center for Condensed Matter Physcis and Beijing High Pressure Research Center Chinese Academy of Sciences Beijing China

The single-phase sample of MgB2 was prepared successfully at the temperature of 900℃ and under the pressure of 3 GPa. The structure of the sample was investigated using powder X-ray diffraction and Rietveld analysis. The results show that the structure of the sample belongs to the hexagonal structure with space group of P6/mmm, a=3.0861(5) A, c=3.5222(8) A. The magnetic and resistance measurements indicate that the superconducting transition temperature Tc is 39 K.

关键词： superconductivity magnetization resistance.

^(128—150)Ce偶偶核的低能谱和电磁跃迁的相互作用玻色子模型

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高能物理与核物理 2000年第11期24卷 1066-1072页

作者：张进富朴在渊刘凤英清华大学物理系北京100084 金日成综合大学原子能系赤峰民族师范高等专科学校物理系

采用相互作用玻色子模型研究了１２８—１５０Ｃｅ同位素核的低能正宇称态的能谱和电磁跃迁．应用简单的哈密顿量很好的描述它们的能谱和Ｅ２跃过．研究表明，这些偶偶Ｃｅ核是属于Ｕ（５）到ＳＵ（３）过渡核，而１４６Ｃｅ以后的核基... 详细信息

采用相互作用玻色子模型研究了１２８—１５０Ｃｅ同位素核的低能正宇称态的能谱和电磁跃迁．应用简单的哈密顿量很好的描述它们的能谱和Ｅ２跃过．研究表明，这些偶偶Ｃｅ核是属于Ｕ（５）到ＳＵ（３）过渡核，而１４６Ｃｅ以后的核基本是完全的转动核．

关键词：能谱电磁跃迁低能正宇称集体态