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尿液中锌的比色智能检测

分析科学学报 2024年第2期40卷 165-171页

作者：张子缓刘凤娇郑凤英骆嘉燚黄昭景梁洁玲郑静茵黄倩燕李顺兴闽南师范大学化学化工与环境学院福建漳州363000 福建省现代分离分析科学与技术重点实验室福建漳州363000

设计制备了对锌有特异性响应、负载显色剂Zincon的比色检测试纸。在滴入p H9.0的硼酸盐缓冲溶液后试纸呈红色,Zincon和试样中锌络合后,试纸颜色由红色转变为蓝色,以试纸颜色R通道值绘制标准曲线,可定量测定尿液中锌含量。建立以聚丙烯腈... 详细信息

设计制备了对锌有特异性响应、负载显色剂Zincon的比色检测试纸。在滴入p H9.0的硼酸盐缓冲溶液后试纸呈红色,Zincon和试样中锌络合后,试纸颜色由红色转变为蓝色,以试纸颜色R通道值绘制标准曲线,可定量测定尿液中锌含量。建立以聚丙烯腈(PAN)、聚乙烯吡咯烷酮(PVP)为载体的显色剂保护机制,以静电纺丝法保证比色传感器制备重现性。基于机器学习模型-深度卷积神经网络(Deepconvolutional neuralnetworks,DCNN)算法解决显色试纸光谱干扰问题,此算法具有较好预测精准度,搭载到智能手机APP,构成集“快速采样、数据处理和传输、实时、可视化检测”于一体的尿锌全分析系统。方法检测限低至0.1mg/L,可用于疾病的无创预诊,具有成本低、检测快、易操作、精度好与准确率高的优点。

关键词：尿锌机器学习比色检测疾病预防

Nitrogen-doped carbon@TiO_(2) double-shelled hollow spheres as an electrochemical sensor for simultaneous determination of dopamine and paracetamol in human serum and saliva

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Journal of Pharmaceutical Analysis 2022年第3期12卷 436-445页

作者： Hui Yang Gongxun Cao Yongjun Huang Ye Lin fengying zheng Luxiu Lin Fengjiao Liu Shunxing Li College of Chemistry Chemical Engineering and EnvironmentMinnan Normal UniversityZhangzhouFujian363000China Fujian Provincial Key Laboratory of Pollution Monitoring and Control Minnan Normal UniversityZhangzhouFujian363000China Fujian Key Laboratory of Separation and Analysis Science and Technology ZhangzhouFujian363000China

As the most commonly used antipyretic and analgesic drug,paracetamol(PA)coexists with neurotransmitter dopamine(DA)in real biological *** simultaneous determination is extremely important for human health,but they also interfere with each *** order to improve the conductivity,adsorption affinity,sensitivity,and selectivity of TiO_(2)-based electrochemical sensor,N-doped carbon@-TiO_(2) double-shelled hollow sphere(HeC/N@TiO_(2))is designed and synthesized by simple alcoholic and hydrothermal method,using polystyrene sphere(PS)as a ***,TiO_(2) hollow spheres(H eTiO_(2))or N-doped carbon hollow spheres(HeC/N)are also prepared by the same ***/N@TiO_(2) has good conductivity,charge separation,and the highly enhanced and stable current responses for the detection of PA and *** detection limit and linear range are 50.0 nmol/L and 0.3-50 mmol/L for PA,40.0 nmol/L and 0.3e50 mmol/L for DA,respectively,which are better than those of carbon-based ***,this electrochemical sensor,with high selectivity,strong anti-interference,high reliability,and long time durability,can be used for the simultaneous detection of PA and DA in human blood serum and *** high electrochemical performance of HeC/N@TiO_(2) is attributed to the multifunctional combination of different layers,because of good conductivity,absorption and electrons transfer ability from in-situ N-doped carbon and electrocatalytic activity from TiO_(2).

关键词： Electrochemical sensor Simultaneous determination Paracetamol Dopamine

Observer-based backstepping longitudinal control for carrier-based UAV with actuator faults

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Journal of Systems Engineering and Electronics 2017年第2期28卷 322-337页

作者： fengying zheng Ziyang Zhen Huajun Gong College of Astronautics Nanjing University of Aeronautics and Astronautics Nanjing 210016 China College of Automation Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

The paper presents the longitudinal control for the carrier-based unmanned aerial vehicle (UAV) system with unmeasured states, actuator faults, control input constraints, and external disturbances. By combining output state observer, adaptive fuzzy control, and constraint backstepping technology, a robust fault tolerant control approach is proposed. An output state observer with fuzzy logic systems is developed to estimate unmeasured states, and command filters rather than differentiations of virtual control law are used to solve the computational complexity problem in traditional backstepping. Additionally, a robust term is introduced to offset the fuzzy adaptive estimation error and external disturbance, and an appropriate fault controller structure with matching conditions obtained from fault compensation is proposed. Based on the Lyapunov theory, the designed control program is illustrated to guarantee that all the closed-loop signals of the given system are bounded, and the output errors converge to a small neighborhood of zero. A carrier-based UAV nonlinear longitudinal model is employed to testify the feasibility and validity of the control scheme. The simulation results show that all the controllers can perform at a satisfactory level of reference tracking despite the existence of unknown aerodynamic parameters and actuator faults. © 2017 Beijing Institute of Aerospace Information.

关键词： Actuators Aircraft control Backstepping Control system analysis Control theory Controllers Error compensation Fault tolerance Flight control systems Fuzzy control Fuzzy filters Fuzzy logic State estimation Three term control systems Unmanned aerial vehicles (UAV)

New Mode in Parasites Experimental Teaching --Application and Experience of Interactive Teaching with Digital Microscope System

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International English Education Research 2014年第9期 73-75页

作者： zheng fengying Teaching and Research Section of Medical Laboratory Science of Medical School Binzhou Polytechnic Binzhou 256600

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智能应急广播系统的开发与应用

电视技术 2023年第2期47卷 79-81,85页

作者：郑丰颖仙居县传媒中心(仙居县广电传媒集团、仙居县广播电视台) 浙江台州317300

智能应急广播系统的开发与应用,是完善基层应急广播体系、提升基层应急广播服务能力的重要路径。以浙江省仙居县为例,在概括介绍智能应急广播系统的基础上,对智能应急广播系统开发的技术方案以及系统的具体应用情况进行分析研究,进而总... 详细信息

智能应急广播系统的开发与应用,是完善基层应急广播体系、提升基层应急广播服务能力的重要路径。以浙江省仙居县为例,在概括介绍智能应急广播系统的基础上,对智能应急广播系统开发的技术方案以及系统的具体应用情况进行分析研究,进而总结出较为完善的基层智能应急广播系统开发与应用成果,为智能应急广播系统的开发与应用实践提供相关经验参考。

关键词：智能应急广播系统系统开发与应用基层应急广播体系

Study on Pseudolite System for BeiDou Based on Dynamic and Independent Aircrafts Configuration

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Study on Pseudolite System for BeiDou Based on Dynamic and I...

配比施肥对带状采伐毛竹林立竹数量和质量恢复的影响

第四届中国卫星导航学术年会

作者： Guohua Kang Longyu Tan Bing Hua fengying zheng Academy of Frontier Science NanJing University of Aeronautics and Astronautics College of Automation Engineering NanJing University of Aeronautics and Astronautics

This paper presents a pseudolite system for BeiDou based on dynamic and independent aircrafts configuration. Firstly, high-altitude and long-endurance unmanned aerial vehicles and airships are needed to obtain the best configuration by analyzing GDOP. Then aiming at the pseudolites’ positioning, a new integrated scheme was proposed, where distance between two aircrafts is utilized to improve the positioning accuracy. Simulation results show that GDOP is less than 3.5 and position precision of the pseudolite is 1.2m in the users’ area .The pseudolite system is able to provide moderate navigation service, when BeiDou position system is unavailable to users.

关键词： pseudolite BeiDou position system dynamic configuration integrated position

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南京林业大学学报（自然科学版） 2024年第2期48卷 79-85页

作者：李承基官凤英周潇张璇郑亚雄国际竹藤中心竹藤科学与技术重点实验室北京100102 江苏宜兴竹林生态系统国家定位观测研究站江苏无锡214200

【目的】毛竹(Phyllostachys edulis)是我国森林资源的重要组成部分,带状采伐是一种常用高效、可机械化的新型竹林经营模式,探究施肥对带状采伐后毛竹林恢复的影响机制,筛选最适施肥配比,可为毛竹林的高效及可持续经营提供参考。【方法... 详细信息

【目的】毛竹(Phyllostachys edulis)是我国森林资源的重要组成部分,带状采伐是一种常用高效、可机械化的新型竹林经营模式,探究施肥对带状采伐后毛竹林恢复的影响机制,筛选最适施肥配比,可为毛竹林的高效及可持续经营提供参考。【方法】于江苏宜兴林场选取立地条件较好的区域,选择出笋大年的毛竹纯林,在8 m带宽的带状采伐地设置主肥成分N、P2O5、K2O的质量比为2.0∶1.0∶1.0、3.5∶1.0∶2.0、5.0∶1.0∶2.5共3种配比(F1、F2、F3)的施肥试验,以不施肥为对照组。调查处理林地的主要生产力指标(出笋数量、成竹率、新竹胸径特征等),通过数据对比以及方差分析、线性关系拟合等,探究带状采伐毛竹林恢复过程中立竹质量和数量特征对施肥的响应机制。【结果】(1)配比施肥能够显著促进带状采伐毛竹林春笋萌发,但退笋现象明显,成竹率显著降低,施肥处理的林分立竹密度与对照无显著差异,林分的立竹数量特征恢复至伐前水平;(2)F2和F3处理能够显著提高新竹的平均胸径,提高中大径竹的占比,F2处理的新竹胸径-树高散点关系接近传统经营模式。【结论】带状采伐毛竹林立竹恢复的数量和质量特征对不同配比施肥的响应存在差异,但数量特征均能恢复至伐前水平,高氮高钾的配比施肥能够显著提高林分质量,以N、P2O5、K2O质量比为3.5∶1.0∶2.0的配比效果为佳。

关键词：毛竹带状采伐配比施肥质量恢复立竹密度

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基于坐标系动态变化的无人机着舰引导算法

中南大学学报（自然科学版） 2016年第8期47卷 2685-2693页

作者：郑峰婴龚华军甄子洋南京航空航天大学航天学院江苏南京210016 南京航空航天大学自动化学院江苏南京210016

针对无人机着舰区域动态变化,难以精确预估的问题,设计一种基于新坐标体系动态变化的自动着舰引导算法。在捕获阶段,新坐标系随无人机空间位置的变化而动态变化;在跟踪阶段,新坐标系随回收着舰区域的变化而动态变化,计算无人机在新坐标... 详细信息

针对无人机着舰区域动态变化,难以精确预估的问题,设计一种基于新坐标体系动态变化的自动着舰引导算法。在捕获阶段,新坐标系随无人机空间位置的变化而动态变化;在跟踪阶段,新坐标系随回收着舰区域的变化而动态变化,计算无人机在新坐标系下的速度和位置误差,经轨迹控制器修正误差,实现无人机的精确引导。以现役某型舰载无人机为对象,搭建综合仿真平台,设计飞行控制系统,优化轨迹控制器参数,加入舰尾流和导航误差,完成引导性能的验证与评估。研究结果表明:该自动着舰系统能引导无人机实现较精确地撞网着舰回收,着舰性能符合要求。

关键词：无人机自动着舰引导算法飞行控制轨迹引导

黏胶基植物抗菌纤维赛络紧密纺纱线的开发及性能

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上海纺织科技 2022年第12期50卷 40-43页

作者：刘维华毛雷郑凤英宋红娟刘莹滨州职业学院山东滨州256600 盐城工业职业技术学院江苏盐城224005

选用艾草纤维、薄荷纤维和板蓝根纤维3种黏胶基天然植物抗菌纤维分别开发了14.8tex紧密赛络纺纱线,对工艺流程、工艺参数及生产注意事项进行了分析。利用高效液相色谱法和气相色谱法测试了3种纱线中植物抗菌有效成分的含量,并测试纱线... 详细信息

选用艾草纤维、薄荷纤维和板蓝根纤维3种黏胶基天然植物抗菌纤维分别开发了14.8tex紧密赛络纺纱线,对工艺流程、工艺参数及生产注意事项进行了分析。利用高效液相色谱法和气相色谱法测试了3种纱线中植物抗菌有效成分的含量,并测试纱线抗菌性及毛羽、条干、强伸等性能指标,从微观结构上对各项性能进行了分析。结果表明:3种纱线都具有优良的抗菌性,其中艾草纤维纱线的抗菌性最好,板蓝根纤维纱线次之,薄荷纤维纱线较差;薄荷纤维纱线断裂强力较大、弹性最好,艾草纤维纱线断裂强力最差、弹性较差,板蓝根纤维纱线断裂强度最高、弹性最差;3种纱线毛羽较少,服用性能良好。

关键词：抗菌纺织品薄荷纤维艾草纤维板蓝根纤维赛络紧密纺