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Self-assembled small molecular weight hydrogels of prodrugs

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Chinese Chemical Letters 2017年第9期28卷 1835-1840页

作者： yanfang zhou Xingyi Li Institute of Biomedical Engineering School of Ophthalmology & Optometry and Eye HospitalWenzhou Medical University Wenzhou 325027 China

Molecular self-assembly is very ordinary phenomenon in the biological process such as protein folding,DNA encoding and *** by this inherent biological process,nanostructure such as nanofibers,nanosphere,and so on formed by the therapeutic agents and its derivatives that can further self-assemble into supramolecular hydrogels have attained considerable attentions in the field of drug delivery due to its favorable features such as high and precise drug payload,carrier-free and excellent ***,the prodrug hydrogelator can be rationally designed to fine-tune over its drug release behavior and degradation in response to various biological stimulus（temperature,p H,ionic strength and etc.）.This review summarized and discussed the recent advancement in the self-assembled small molecular weight hydrogels of prodrugs.

关键词： Small molecular weight hydrogel Self-assembly Prodrug Drug delivery

Performances improvement of eosin Y sensitized solar cells by modifying TiO_2 electrode with silane-coupling reagent

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Chinese Science Bulletin 2009年第15期54卷 2633-2640页

作者： zhou yanfang LI XuePing ZHANG JingBo zhou XiaoWen LIN Yuan CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Chemical fixing of xanthene dye (eosin Y) on the surface of TiO2 electrode was carried out by modifying the electrode with silane-coupling reagent to obtain stable dye-sensitized TiO2 electrode. Such silane modification can not only evidently enhance the stability of dye-sensitized TiO2 electrode but also im-prove the energy conversion efficiency of the assembled cells by increasing short-circuit photocurrent (JSC) and open-circuit photovoltage (VOC). It was found that the improvements of cell performances differ depending on the composition of the electrolyte. The optimum cell of the cell performance was achieved in the electrolyte with 0.5 mol/L TBAI/0.05 mol/L I2/EC:PC(3:1 w/w), yielding JSC of 4.69 mA·cm?2, VOC of 0.595 V, fill factor (FF) of 0.64 and η of 1.78%. Different spectroscopic techniques including UV-Vis spectra, fluorescence spectra, EIS and dark current measurements were employed to derive reasonable analysis and explanations.

关键词： TiO2电极硅烷偶联剂太阳能电池染料敏化曙红Y 修改表演能量转换效率

Simulation and experimental verification of off-axis fiber Bragg grating bending sensor with high refractive index modulation

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Optoelectronics Letters 2022年第4期18卷 200-203页

作者： CUI Wei zhou yanfang YAN Zhonghua GUO Junqi YUE Yiting CHEN Hao Chongqing Engineering Research Center of Intelligent Sensing Technology and Microsystem Chongqing University of Post and TelecommunicationsChongqing 400065China

Off-axis FBG simulations were performed in this paper using a finite element method in conjunction with the conformal mapping technique to study the bending sensing characteristics of the off-axis FBG with high index *** refractive index(RI)increase of the grating region is taken into consideration for the mode field *** influences of high RI increase and the offset distance of the grating on the bending sensitivity were ***-axis FBGs with different offset distances were fabricated using femtosecond laser with phase mask technique in standard single-mode *** simulation results were verified by the experiment.A bending sensitivity of 0.055 d B/m^(-1) was achieved with an offset distance of 4μ*** simulation and experiment results suggest that the grating offset distance has a greater influence on the sensitivity of the off-axis FBG with high RI modulation than that with low RI *** proposed sensor structure and simulation results can provide suggestion for the design and processing of off-axis FBG bending sensors.

关键词： fiber bending offset

Research on a fiber sensing system for metal ion detection based on SPF-PCF-SPF structure and coated LPFG

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Optoelectronics Letters 2024年第4期20卷 211-215页

作者： GUO Junqi zhou yanfang ZHENG Wenyue XU Qianwen LIU Yu LI Renpu Chongqing Key Laboratory of Autonomous Navigation and Microsystem Chongqing University of Post and TelecommunicationsChongqing 400065China Chongqing Engineering Research Center of Intelligent Sensing Technology and Microsystem Chongqing University of Posts and TelecommunicationsChongqing 400065China

In order to provide a method for accurately detecting the concentration and types of heavy metal ions in water,a fluid ion detection system is *** consists of a side-polished fiber-assisted fluid structure and a long-period fiber grating(LPFG)coated with a metal chelating agent *** this study,both theoretical and experimental investigations are conducted to examine the sensing characteristics of the system towards copper ion and iron ion *** results demonstrate that under the premise of ensuring solution flow,the system can achieve specific identification of different types of heavy metal ***,it exhibits concentration sensing sensitivities of 9.23×10^(4) mL·nm/mol and 7.13×10^(4) mL·nm/mol for copper sulfate(CuSO_(4))and ferric chloride(FeCl_(3))solutions,***,this sensing system offers the potential for real-time detection of metal ions.

关键词： system fiber structure

Discussion on Priorities of Railway 5G-R Research and Development

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Chinese Railways 2023年第1期 13-17页

作者： JIANG Yongfu zhou yanfang Department of Track Communication&Signaling and Power SupplyChina State Railway Group Co.Ltd. 不详

As the railway sector intensifies its efforts in the technology research,system R&D and technology application of 5G-R,the paper conducts a preliminary study on its application frequency in terms of its frequency propagation,network carrying capacity,its ability to work as industrial pillar,system applicability,and the compatibility of 5G-R with other *** line with China's GSM-R application practice and the application needs,the paper focuses on the study of key technologies such as model alignment of base station equipment,and optimization of 5G-R terminal and core network,identifying the priorities for the China's efforts to develop 5G-R and providing references for the research and application of related technologies.

关键词： 5G-R frequency research base station equipment core network system R&D

Demand Analysis and Solution Exploration on 5G Carrying Railway Operational Services

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Chinese Railways 2023年第1期 18-24页

作者： LIU Ziyuan zhou yanfang China Academy of Railway Sciences Corporation Limited 不详

Given the overwhelmed GSM-R network in China,the railway sector has turned to the public network to promote railway communication *** 5G identified as the next-generation mobile communication network for railways,China has proposed a holistic approach for the building of intelligent railway via 5G public *** on the characteristics of 5G and the classic services of railway,the paper proposes a categorized carrying scheme for railway in mobile communication network,as well as a graded scheme based on *** paper then advises to accelerate the development of 5G-R equipment and adopt diverse mobile communication networks to carry railway business,which are of reference to future studies on the issue.

关键词： 5G-R GSM-R railway business communication requirements carrying scheme

The GSM-R Implementation Plan of Jakarta-Bandung High-speed Railway

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Chinese Railways 2024年第1期 46-51页

作者： WEN Shiya PENG Liangyong zhou yanfang(Translated) Electrification&Telegraphy Engineering Design Research Department China Railway Design Corporation 不详

GSM-R system mainly provides dispatching communication servicessuch as train operation dispatching, realizes wired and wireless dispatchingcommunication, and provides safe and reliable train-ground informationtransmission services for high-speed train operation control system. Jakarta-Bandung HSR is the first “going global” HSR with whole industry chain built by China. It isconstructed based on CTCS-3 train control system standard. In order to ensure the safetransmission of train control system information under high-speed operation environment, aset of GSM-R system implementation scheme suitable for Jakarta-Bandung HSR is establishedin combination with the actual situation of Jakarta-Bandung HSR, referring to China's GSMRsystem technical standards and according to its actual business requirements. It includesGSM-R core network, wireless subsystem and data number, which can provide reference forthe construction of wireless communication system for China's HSR “going global”.

关键词： Jakarta-Bandung HSR GSM-R core network train control

十二指肠充盈造影法超声检查壶腹占位的应用探讨

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中国超声医学杂志 2013年第9期29卷 810-811页

作者：周艳芳博兴县中医医院超声科

目的探讨应用十二指肠充盈超声造影法检查,在诊断壶腹占位的实用价值。方法对超声检查发现胆管梗阻征象者,进行常规超声检查及十二指肠充盈超声造影检查和分析壶腹部有无占位性病变,分别记录检查结果,并分组对比分析（A组:占位最大径10... 详细信息

目的探讨应用十二指肠充盈超声造影法检查,在诊断壶腹占位的实用价值。方法对超声检查发现胆管梗阻征象者,进行常规超声检查及十二指肠充盈超声造影检查和分析壶腹部有无占位性病变,分别记录检查结果,并分组对比分析（A组:占位最大径10 mm）。结果常规超声检查壶腹部占位显示率:A组约20%,B组33.3%,C组42.8%;而十二指肠充盈超声造影法检查对壶腹部占位病变的显示率:A组60%,B组83.3%,C组100%。结论十二指肠充盈超声造影法检查壶腹部占位,与常规超声检查在壶腹周围部占位相比,显示率明显提高。

关键词：十二指肠充盈超声造影法超声检查壶腹部占位

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矿用减速器齿轮根切半径的求法

煤矿机械 2019年第8期40卷 20-21页

作者：周艳芳长治职业技术学院

在德国进口的煤矿机械用减速器中,大量使用着根切齿轮,并且齿轮的齿根弯曲疲劳强度和使用寿命不会因此而过度降低,也就是说存在一个最佳的根切量以及对应的最佳变位系数,要确定最佳变位系数,首先得计算齿轮根切半径。

关键词：根切齿轮根切点根切半径展角