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Perpendicularly assembled oriented electrospinning nanofibers based piezoresistive pressure sensor with wide measurement range

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Nano Research 2024年第7期17卷 6493-6501页

作者： Xiaoxue Bi zhigang duan Xiaojuan Hou Shuo Qian Mengjiao Yuan Jiajun Hu Jie Zhang Yuchen Lu Yanli Liu Jian He Zhiling Peng Xiujian Chou School of Mechanical and Electrical Engineering North University of ChinaTaiyuan 030051China Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China School of Software North University of ChinaTaiyuan 030051China School of Information and Communication Engineering North University of ChinaTaiyuan 030051China

With the rapid development of wearable electronics,flexible pressure sensors have attracted wide attention in human–computer interaction and intelligent ***,it is a challenge to achieve a sensor with high sensitivity,wide measurement range,and wearing ***,we develop an oriented electrospinning thermoplastic polyurethane/polyacrylonitrile(TPU/PAN)nanofibers(OETPN)based piezoresistive pressure sensor(PONPS)in which the active layer and the electrode are assembled *** interdigital electrode is fabricated by spraying silver nanowires(AgNWs)on the OETPN through a mask *** active layer is composed of OETPN coated with MXene,encapsulated on the electrode by polyurethane(PU)*** porous structure of nanofibers membrane broadens the measurement range of the *** oriented nanofibers as active layer can improve the sensitivity in low pressure,because oriented nanofibers without interweaving nanofibers are more compressible than disordered *** prepared using the spraying method creates nanoscale microstructure and increases *** perpendicular assembly has greater response between the active layer and the electrode than the parallel assembly to improve the *** sensor exhibits high sensitivity(6.71 kPa^(−1),0.02–2 kPa)and wide measurement range(0.02–700 kPa).The sensor can detect weak signals such as radial artery.A pressure array constructed precisely represents the distribution of *** intelligent throat is created by combining machine learning algorithms with the *** can detect and recognize subtle throat vibrations while speaking,achieving recognition accuracy up to 100%using support vector machine(SVM)for five words with different *** fabricated sensor shows promising prospects in personal healthcare and intelligent robots.

关键词： oriented nanofibers perpendicular assembly parallel assembly intelligent throat machine learning algorithms

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Flexible wide-range multidimensional force sensors inspired by bones embedded in muscle

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Microsystems & Nanoengineering 2024年第3期10卷 49-61页

作者： Jie Zhang Xiaojuan Hou Shuo Qian Jiabing Huo Mengjiao Yuan zhigang duan Xiaoguang Song HuiWu Shuzheng Shi Wenping Geng Jiliang Mu Jian He Xiujian Chou Science and Technology on Electronic Test and Measurement Laboratory North University of ChinaTaiyuan 030051China School of Software North University of ChinaTaiyuan 030051China School of Mechanical Engineering Hebei University of ArchitectureZhangjiakou 075000China HBIS Group Co.Ltd. Shijiazhuang 050023China

Flexible sensors have been widely studied for use in motion monitoring,human‒machine interactions(HMIs),personalized medicine,and soft intelligent ***,their practical application is limited by their low output performance,narrow measuring range,and unidirectional force ***,to achieve flexibility and high performance simultaneously,we developed a flexible wide-range multidimensional force sensor(FWMFS)similar to bones embedded in muscle *** adjustable magnetic field endows the FWMFS with multidimensional perception for detecting forces in different *** multilayer stacked coils significantly improved the output from theμV to the mV level while ensuring FWMFS *** optimized FWMFS exhibited a high voltage sensitivity of 0.227 mV/N(0.5–8.4 N)and 0.047 mV/N(8.4–60 N)in response to normal forces ranging from 0.5 N to 60 N and could detect lateral forces ranging from 0.2–1.1 N and voltage sensitivities of 1.039 mV/N(0.2–0.5 N)and 0.194 mV/N(0.5–1.1 N).In terms of normal force measurements,the FWMFS can monitor finger pressure and sliding trajectories in response to finger taps,as well as measure plantar pressure for assessing human *** plantar pressure signals of five human movements collected by the FWMFS were analyzed using the k-nearest neighbors classification algorithm,which achieved a recognition accuracy of 92%.Additionally,an artificial intelligence biometric authentication system is being developed that classifies and recognizes user *** on the lateral force measurement ability of the FWMFS,the direction of ball movement can be distinguished,and communication systems such as Morse Code can be *** research has significant potential in intelligent sensing and personalized spatial recognition.

关键词： password Morse force

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高浓度废水处理及资源回收的研究

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化工设计通讯 2024年第3期50卷 135-137页

作者：段志刚奥福科技有限公司江西分公司江西南昌330001

立足于废水有效治理和资源回收利用为一体的原则,采用减压蒸发结晶法处理印染厂实际生产产生的酸性废水,处理后废水可达标排放;利用溶剂萃取法回收结晶盐中所含产品,回收率为83.2%,实现了废水的净化处理和资源综合利用双重效益。

关键词：酸性染料废水邻氨基苯磺酸蒸发结晶处理回收

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Prescribed Performance Evolution Control for Quadrotor Autonomous Shipboard Landing

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IEEE/CAA Journal of Automatica Sinica 2024年第5期11卷 1151-1162页

作者： Yang Yuan Haibin duan zhigang Zeng State Key Laboratory of Virtual Reality Technology and Systems the School of Automation Science and Electrical EngineeringBeihang UniversityBeijing 100083China State Key Laboratory of Virtual Reality Technology and Systems the School of Automation Science and Electrical EngineeringBeihang UniversityBeijing 100083 Virtual Reality Fundamental Research Laboratory Department of Mathematics and TheoriesPeng Cheng LaboratoryShenzhen 518000China School of Artificial Intelligence and Automation Huazhong University of Science and TechnologyWuhan 430074China

The shipboard landing problem for a quadrotor is addressed in this paper,where the ship trajectory tracking control issue is transformed into a stabilization control issue by building a relative position *** guarantee both transient performance and steady-state landing error,a prescribed performance evolution control(PPEC)method is developed for the relative position *** addition,a novel compensation system is proposed to expand the performance boundaries when the input saturation occurs and the error exceeds the predefined *** the wind and wave on the relative position model,an adaptive sliding mode observer(ASMO)is designed for the disturbance with unknown upper *** on the dynamic surface control framework,a shipboard landing controller integrating PPEC and ASMO is established for the quadrotor,and the relative position control error is guaranteed to be uniformly ultimately *** results have verified the feasibility and effectiveness of the proposed shipboard landing control scheme.

关键词： error integrating stabilization

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含氟废水处理存在的问题与对策

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山东水利 2024年第5期 66-67,70页

作者：张鑫任保纯段志杙济南水务集团有限公司山东济南250013

当前,随着光伏产业的快速发展,含氟废水的处理问题日益突出。本文针对含氟废水处理的现状,分析了含氟废水产生的源头以及目前现状,指出了当前含氟废水处理存在的问题。在此基础上,提出了一系列相应的解决对策,包括增建扩容污水处理厂、... 详细信息

当前,随着光伏产业的快速发展,含氟废水的处理问题日益突出。本文针对含氟废水处理的现状,分析了含氟废水产生的源头以及目前现状,指出了当前含氟废水处理存在的问题。在此基础上,提出了一系列相应的解决对策,包括增建扩容污水处理厂、改进工艺流程及处理技术、推广先进工艺、推进技术研发、提高废水回收利用率、强化监管等。旨在提高含氟废水处理效果,减轻对环境的负面影响,为光伏产业等产生含氟废水产业的可持续发展提供有力保障,为政府决策和规划及项目开展提供参考。

关键词：光伏产业污水处理含氟废水

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Surface diurnal warming in the East China Sea derived from satellite remote sensing

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Journal of Oceanology and Limnology 2018年第3期36卷 620-629页

作者： SONG Dan duan zhigang ZHAI Fangguo HE Qiqi Institute of Physical Oceanography Ocean CollegeZhejiang UniversityZhoushan 316021China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic Administration Hangzhou 310021China College of Oceanic andAtmospheric Sciences Ocean University of ChinaQingdao 266100China

Process of sea surface diurnal warming has drawn a lot of attention in recent years, but that occurs in shelf seas was rarely addressed. In the present work, surface diurnal warming strength in the East China Sea was calculated by the sea surface temperature(SST) data derived from the MODIS sensors carried by the satellites Aqua and Terra. Due to transit time difference, both the number of valid data and the surface diurnal warming strength computed by the MODIS-Aqua data are relatively larger than Terra. Therefore, the 10-year MODIS-Aqua data from 2005 to 2014 were used to analyze the monthly variability of the surface diurnal warming. Generally, the surface diurnal warming in the East China sea is stronger in summer and autumn but weaker in winter and spring, while it shows different peaks in different regions. Large events with ΔT≥5 K have also been discussed. They were found mainly in coastal area, especially near the Changjiang(Yangtze) River estuary. And there exists a high-incidence period from April to July. Furthermore, the relationship between surface diurnal warming and wind speed was discussed. Larger diurnal warming mainly lies in areas with low wind speed. And its possibility decreases with the increase of wind speed. Events with ΔT ≥2.5 K rarely occur when wind speed is over 12 m/s. Study on surface diurnal warming in the East China Sea may help to understand the daily scale air-sea interaction in the shelf seas. A potential application might be in the marine weather forecasts by numerical models. Its impact on the coastal eco-system and the activities of marine organisms can also be pursued.

关键词： Moderate-Resolution Imaging Spectroradiometer (MODIS) sea surface temperature (SST) diurnal warming East China Sea

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深层稠油油藏微生物吞吐技术研究与应用

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油田化学 2018年第3期35卷 499-502页

作者：杜勇段志刚中国石化胜利油田分公司山东东营257237

针对深层稠油油藏桩139块部分井注汽压力高、且二次DC冷采效果不好的低液低产现状,开展了微生物吞吐采油技术研究与应用。根据试验井所处的油藏特征和原油性质,优选了微生物复合吞吐体系主要成分,并按设计的注入段塞应用于桩西油田和太... 详细信息

针对深层稠油油藏桩139块部分井注汽压力高、且二次DC冷采效果不好的低液低产现状,开展了微生物吞吐采油技术研究与应用。根据试验井所处的油藏特征和原油性质,优选了微生物复合吞吐体系主要成分,并按设计的注入段塞应用于桩西油田和太平油田。结果表明,采用激活剂II(0.4%糖蜜+0.2%玉米浆干粉+0.2%糊精+0.2%NaNO3+0.02%(NH4)2HPO4)、含地芽孢杆菌属的外源菌液和0.1%槐糖脂类生物表面活性剂配制的微生物复合吞吐体系,在pH值为5的条件下,乳化原油效果好,产气量较大。在矿场以6 m3/h注入主段塞200 m3的微生物复合吞吐体系后,原油黏度降幅50.1%,增油有效期166 d,累计增油915 t,投入产出比1∶9.07,经济效益明显提高。

关键词：稠油油藏微生物激活剂外源菌表面活性剂

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NEW ALGORITHM TO CONSTRUCT DUAL FAMILY

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Chinese Science Bulletin 1988年第9期33卷 722-725页

作者：段志刚 Beijing Institute of Control Engineering

In this report, a new algorithm to construct a dual family of the Boolean function is presented. By double dual, all the prime implicate terms of the Boolean function or noncoherent fault tree can be obtained. To identify all the system failure modes in the field of fault tree analysis on the noncoherent system, the important concept of the prime implicate set (PIS) must

关键词： Boolean minimization factorization utilized repeatedly arbitrary steps nonempty eliminated letter

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函数波束形成声源识别性能分析及应用

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机械工程学报 2017年第4期53卷 67-76页

作者：褚志刚段云炀沈林邦杨洋重庆大学机械传动国家重点实验室重庆400044 重庆大学汽车工程学院重庆400044 重庆工业职业技术学院车辆工程学院重庆401120

函数波束形成声源识别算法能够有效克服传统波束形成存在的"主瓣"宽、"旁瓣"高且多等缺陷。基于传统波束形成及矩阵特征值分解理论,给出函数波束形成算法的理论推导。基于自主开发的算法程序进行单声源、不相干双声源的模拟仿真,结果表... 详细信息

函数波束形成声源识别算法能够有效克服传统波束形成存在的"主瓣"宽、"旁瓣"高且多等缺陷。基于传统波束形成及矩阵特征值分解理论,给出函数波束形成算法的理论推导。基于自主开发的算法程序进行单声源、不相干双声源的模拟仿真,结果表明:函数波束形成在识别单声源、不相干声源时均能有效地衰减旁瓣,提高识别分辨率,且能清晰地识别弱源;当声源不在聚焦网格点时,函数波束形成主瓣峰值输出随指数的增大而降低,出现失真的情况;传声器及测量通道频响失配情况对函数波束形成的成像影响很小。由函数波束形成峰值输出误差随指数的变化曲线,建议指数一般取16。进一步,不相干四声源的算例试验验证了算法的有效性及程序的正确性。对某汽车前围板的隔声薄弱环节识别中,除空调进风口及暖风机进出水管安装孔隔声薄弱环节以外,亦准确定位转向柱安装孔附近这一隔声薄弱位置,识别结果更全面,为进一步改进其隔声性能指明了方向。

关键词：声源识别波束形成互谱特征值分解试验

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木质材料等离子体改性研究进展

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世界林业研究 2017年第5期30卷 51-55页

作者：段志刚杜官本西南林业大学云南省木材胶黏剂及胶合制品重点实验室昆明650224

等离子体改性技术作为一种高效、绿色的处理工艺已广泛应用于催化剂合成、表面活化、化合物镀膜等研究及应用领域。其对木质材料改性研究从上世纪90年代至今已取得许多重要的实验及理论成果,可综述为:1)木质材料等离子体改性的特性;2)... 详细信息

等离子体改性技术作为一种高效、绿色的处理工艺已广泛应用于催化剂合成、表面活化、化合物镀膜等研究及应用领域。其对木质材料改性研究从上世纪90年代至今已取得许多重要的实验及理论成果,可综述为:1)木质材料等离子体改性的特性;2)木质材料等离子体改性的机理;3)等离子体改性木质材料的设备及工艺。文中在整理近年文献资料的基础上分析了文献中相互矛盾的结论,并对未来等离子体改性木质材料的研究方向提出建议。

关键词：木质材料等离子体表面改性

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