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Side-polished SMS based RI sensor employing macro-bending perfluorinated POF

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Opto-Electronic Advances 2021年第10期4卷 30-37页

作者： Xuezhi Zhang boyue yang Junfeng Jiang Kun Liu Xiaojun Fan Zhaozhu Liu Min Peng Guanlong Chen Tiegen Liu School of Precision Instrument and Opto-Electronics Engineering Tianjin UniversityTianjin 300072China Tianjin Optical Fiber Sensing Engineering Center Institute of Optical Fiber Sensing of Tianjin UniversityTianjin 300072China Key Laboratory of Opto-electronics Information Technology(Tianjin University) Ministry of EducationTianjin 300072China

A refractive index(RI)sensor based on perfluorinated plastic optical fiber(PF-POF)is introduced in this *** PF-POF as multi-mode fiber was side-polished(SP)to form a macro-bending single-mode-multimode-single-mode(SMS)*** ends of the sensor were closely connected to single-mode quartz optical fiber(SMF).The spectral char-acteristics of the sensor are measured,analyzed and *** results show that when the length of PF-POF is 8 cm,the macro-bending radius is 3 cm,and the SP-depth is 20μ*** intensity sensitivity reaches−219.504 dBm/RIU in the range of RI=1.330~1.356.A reference is provided for the application of PF-POF in RI sensor in the *** sensor is featured with low-cost,good flexibility and high efficiency.

关键词： refractive index sensor perfluoropolymer fiber optical sensing plastic optical fiber

陈皮提取物绿色合成纳米银无标记比色法检测汞离子

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化学与生物工程 2020年第8期37卷 51-56页

作者：杨博玥张卫孙奕董晨符伟杰诸杰水利部交通运输部国家能源局南京水利科学研究院江苏南京210029 水利部南京水利水文自动化研究所江苏南京210012 水利部水文水资源监控工程技术研究中心江苏南京210012 南京邮电大学材料科学与工程学院江苏南京210003

以陈皮提取物为还原剂和表面保护剂,一步法合成纳米银(Ag NPs)@陈皮,采用紫外可见吸收光谱、透射电镜及X-射线衍射等对其进行表征,并将Ag NPs@陈皮作为汞离子(Hg^2+)传感探针,采用比色法检测水体中Hg^2+。结果表明,Ag NPs@陈皮具有面心... 详细信息

以陈皮提取物为还原剂和表面保护剂,一步法合成纳米银(Ag NPs)@陈皮,采用紫外可见吸收光谱、透射电镜及X-射线衍射等对其进行表征,并将Ag NPs@陈皮作为汞离子(Hg^2+)传感探针,采用比色法检测水体中Hg^2+。结果表明,Ag NPs@陈皮具有面心立方结构,呈分散分布,形状近似球形,粒径为(39.35±0.83)nm。Ag NPs@陈皮可特异性识别Hg^2+,Hg^2+浓度在0.010~20μmol·L^-1范围内,Ag NPs@陈皮在408 nm处的吸光度下降百分比(Ic)与(lgcHg^2+)5/2呈良好的线性关系,检出限为8.93 nmol·L^-1(S/N=3)。河水水样Hg^2+加标回收率在101.8%~105.9%之间(n=3),RSD小于7%。该方法是一种快速、便捷、灵敏的Hg^2+比色检测方法,具有实际应用潜力。

关键词：绿色合成纳米银陈皮提取物汞离子检测比色法

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非接触式光电液体计量装置设计

自动化仪表 2020年第2期41卷 24-27页

作者：张卫杨博玥孙奕符伟杰张利茹王岩水利部交通运输部国家能源局南京水利科学研究院江苏南京210029 水利部南京水利水文自动化研究所江苏南京210012 水利部水文水资源监控工程技术研究中心江苏南京210012

针对目前水质在线分析仪器中液体计量方式存在的缺点,提出了一种新的非接触式光电计量装置。该计量装置仅需要一个蠕动泵、一个或多个三通电磁气阀、三通电磁液阀、光电开关和球形石英计量管等相互配合,就可以实现一种或多种不同液体体... 详细信息

针对目前水质在线分析仪器中液体计量方式存在的缺点,提出了一种新的非接触式光电计量装置。该计量装置仅需要一个蠕动泵、一个或多个三通电磁气阀、三通电磁液阀、光电开关和球形石英计量管等相互配合,就可以实现一种或多种不同液体体积的同时计量。通过在石英计量管中设计一个球形腔体,能够有效避免管路中气体对体积测量的干扰,也不必严格控制蠕动泵的转速,大大提高了液体的计量速度。该装置具有计量精度高、稳定好,成本低等优点,具有广阔的应用前景。

关键词：液体非接触式计量装置光电开关水质仪器球形石英计量管蠕动泵电磁阀

Robust Predictive Current Control of Induction Motors Based on Linear Extended State Observer

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Chinese Journal of Electrical Engineering 2021年第1期7卷 94-105页

作者： Yongchang Zhang Xing Wang Haitao yang boyue Zhang Jose Rodriguez Inverter Technologies Engineering Research Center of Beijing North China University of TechnologyBeijing 100144China School of Electrical and Electroric Engineering North China Electric Power UniversityBeijing 102206China College of Engineering Universidad Andres BelloSantiago 8370146Chile

Model predictive current control can achieve fast dynamic response and satisfactory steady-state performance for induction motor(IM)***,many motor parameters are required to implement the control ***,if the motor parameters used in the controller are not accurate,the performance may *** this paper,a new robust predictive current control is proposed to improve robustness against parameter *** proposed method employs an ultra-local model to replace the mathematical model of the ***,to improve the control performance,a linear extended state observer is developed for disturbance *** tests confirm that satisfactory tracking performance can still be obtained although the motor parameters may not be accurately set in the controller.

关键词： Induction motor drives current control predictive control observers robustness

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水质总磷自动消解装置工艺条件优化

化学与生物工程 2022年第2期39卷 52-54,68页

作者：孙奕张卫杨博玥郭志春茆文杰花迪黄晓丹符伟杰熊陈朱健勇水利部南京水利水文自动化研究所江苏南京210012 水利部水文水资源监控工程技术研究中心江苏南京210012 辽宁省水利事务服务中心辽宁沈阳110003

针对目前水质总磷在线分析仪存在消解温度高、消解时间长等缺点,设计了一种采用紫外光辅助催化氧化消解技术的总磷自动消解装置,并对消解工艺条件进行了优化。确定总磷的最优消解条件为:消解温度90℃、消解时间15 min、鼓入空气流量30 m... 详细信息

针对目前水质总磷在线分析仪存在消解温度高、消解时间长等缺点,设计了一种采用紫外光辅助催化氧化消解技术的总磷自动消解装置,并对消解工艺条件进行了优化。确定总磷的最优消解条件为:消解温度90℃、消解时间15 min、鼓入空气流量30 mL·min^(-1),在此条件下,可实现总磷的快速、高效在线消解,且消解效率能够达到国标要求。该消解装置模块化设计,具有成本低、安全可靠等优点,可以应用于新型总磷在线分析仪上。

关键词：水质总磷自动消解紫外光辅助催化氧化消解温度消解压力消解效率

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A novel investigation on the influence of Cu–P modifier on the microstructure, mechanical performance, and melting process of Al–50Si alloys treated by overheating

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Progress in Natural Science:Materials International 2021年第3期31卷 461-470页

作者： Tao Jiang Chuang Yu boyue Xu Wei Yu Guangming Xu Yong Li Zhaodong Wang Guodong Wang Key Laboratory of Electromagnetic Processing of Materials of Ministry of Education Northeastern University State Key Laboratory of Rolling and Automation Northeastern University

As an efficient modifier, phosphorus(P) can significantly reduce the size of primary silicon(Si) crystals. However,modifier can aggregate when the P content exceeds a certain proportion, which decreases refining efficiency. In this study, the evolution of microstructures and mechanical properties of Al–50 Si alloy have been studied by combining superheating and modification treatments. After modification, the mean size of the primary Si phase increased with superheating temperature, while the hardness decreased with increased superheating. Although the alloy was in an over-modified state when the modified content was 7 wt%, the overall alloy hardness was the highest. Nanoindentation tests were used to examine the mechanical properties of each alloy phase and the results showed that the nano-hardness of Al2Cu phase was 5.52 GPa, three times that of an Al matrix, and was considered to be the reason for increased alloy hardness after over-modification. This phenomenon indicated that, except for size and distribution of the primary Si phase, intermetallic compounds, such as Al2Cu, also played important roles in modifying alloy mechanical properties. The alloy melting process was observed in-situ using a laser confocal high-temperature scanning microscope and results indicated that the melting temperature of α-Al decreased with increased matrix Cu content. A model for calculating distortion energy was proposed and its rationality *** results showed that, with increased matrix Cu content, the distortion energy gradually increased,which was the main reason for decreased matrix melting temperature. Moreover, the existence of distortion energy was verified using the EBSD method.

关键词： Al–50Si alloy Nano-indentation In-situ observation Distortion energy

Disciplinary construction of rare books' preservation and conservation

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Journal of Library Science in China 2019年 165-166页

作者： YAO boyue ZHOU Yujiao 不详

Since the official implementation of China Rare Books Preservation Project in 2007,great achievements have been made in the preservation and conservation of rare ***,for the lack of specialized talents to be engaged in rare books’preservation and conservation,there is a long way to go to train enough talents to cater the realistic demands,and accordingly the disciplinary construction of rare books’preservation and conservation has become the focus of academic circles.

关键词： Disciplinary construction books

High urea induces depression and LTP impairment through mTOR signaling suppression caused by carbamylation

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High urea induces depression and LTP impairment through mTOR...

首届东方药理论坛暨2018年全国心脑血管药理学术会议、上海市药理学会第十九届学术年会

作者： Hongkai Wang Weiling Wang boyue Huang Jianhua Ran Baoxue yang Department of Pharmacology School of Basic Medical Sciencesand State Key Laboratory of Natural and Biomimetic DrugsPeking University

Background:Depression is one of the main factors lowering quality of life for patients with chronic physical *** is unknown whether a biological factor is implicated in ***,the end product of protein metabolism,has been considered to have negligible toxicity for a *** previous study showed depression phenotype in urea transporter (UT) B knockout mice,which suggests that

关键词： LTP High urea induces depression and LTP impairment through mTOR signaling suppression caused by carbamylation

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京师大学堂藏书楼(图书馆)藏书建设述略

大学图书馆学报 2023年第1期41卷 113-120页

作者：姚伯岳天津师范大学古籍保护研究院天津300387

京师大学堂经历了戊戌大学堂和壬寅大学堂两个阶段,其早期的藏书楼和后来的图书馆在藏书建设上都投入巨大。戊戌大学堂藏书楼虽然只存在不到两年的时间,但中文藏书应已超过5万册,此外还有数量可观的西文藏书,可惜在庚子事变中几乎尽遭... 详细信息

京师大学堂经历了戊戌大学堂和壬寅大学堂两个阶段,其早期的藏书楼和后来的图书馆在藏书建设上都投入巨大。戊戌大学堂藏书楼虽然只存在不到两年的时间,但中文藏书应已超过5万册,此外还有数量可观的西文藏书,可惜在庚子事变中几乎尽遭损毁。壬寅大学堂藏书楼的藏书建设基本上从头开始,但很快就超过了戊戌大学堂曾达到的藏书数量。1904年1月,藏书楼改称图书馆,继续多方采买图书。多年坚持不懈的藏书建设,使京师大学堂以其雄厚的文献典藏而无愧于全国最高学府的称号。

关键词：藏书建设京师大学堂藏书楼京师大学堂图书馆戊戌大学堂壬寅大学堂