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SNR Improvement of QEPAS System by Preamplifier Circuit Optimization and Frequency Locked Technique

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Photonic Sensors 2018年第2期8卷 127-133页

作者： Qinduan ZHANG Jun CHANG zongliang wang Fupeng wang Fengting JIANG Mengyao wang School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application Shandong University Jinan 250100 China School of Physics Science and Information Technology and Shandong Key Laboratory of Optical Communication Science and Technology Liaocheng University Liaocheng 252059 China

Preamplifier circuit noise is of great importance in quartz enhanced photoacoustic spectroscopy （QEPAS） system. In this paper, several noise sources are evaluated and discussed in detail. Based on the noise characteristics, the corresponding noise reduction method is proposed. In addition, a frequency locked technique is introduced to further optimize the QEPAS system noise and improve signal, which achieves a better performance than the conventional frequency scan method. As a result, the signal-to-noise ratio （SNR） could be increased 14 times by utilizing frequency locked technique and numerical averaging technique in the QEPAS system for water vapor detection.

关键词： QEPAS system preamplifier circuit frequency locked method noise optimization

基于无人机遥感的作物表型参数获取和应用研究进展

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山东农业科学 2024年第4期56卷 172-180页

作者：曾世伟侯学会王宗良骆秀斌巫志雄王宏军聊城大学物理科学与信息工程学院山东聊城252000 山东省农业科学院农业信息与经济研究所山东济南250100

作物表型参数是由基因和环境因素决定或影响的作物生理、生化特征和性状。通过获取不同环境、不同生长时期的作物表型信息,可直观了解作物生长状况,以及时调整栽培管理措施,保障作物高效生产。无人机搭载RGB相机、光谱相机、激光雷达等... 详细信息

作物表型参数是由基因和环境因素决定或影响的作物生理、生化特征和性状。通过获取不同环境、不同生长时期的作物表型信息,可直观了解作物生长状况,以及时调整栽培管理措施,保障作物高效生产。无人机搭载RGB相机、光谱相机、激光雷达等传感器,可充分发挥灵活性好、获取数据效率高、成本相对较低等优势,实现作物表型参数信息的高效获取,同时,快速发展的图像处理和识别分类技术又为无人机遥感获取的作物表型参数信息提供了有效的处理和分析方法,从而使得作物监测更加便捷、高效。本文总结了无人机遥感获取作物表型参数信息的流程与方法,概括了基于无人机遥感开展作物株高、冠层覆盖度、叶面积指数、水分胁迫、生物量、产量等表型参数研究的现状,并对无人机遥感技术在作物表型参数信息解析方面的应用前景进行了展望,以期为充分发挥该技术在农业生产中的作用提供参考。

关键词：无人机遥感作物表型参数作物监测

Porous polyetheretherketone microcarriers fabricated via hydroxylation together with cellderived mineralized extracellular matrix coatings promote cell expansion and bone regeneration

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Regenerative Biomaterials 2021年第2期8卷 149-162页

作者： Shuo Sun Zixue Jiao Yu wang Zhenxu Wu Haowei wang Qingming Ji Yi Liu zongliang wang Peibiao Zhang Department of Spine Surgery The First Hospital of Jilin University1 Xinmin StreetChangchun 130021China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun 130022China

Porous microcarriers have aroused increasing attention recently by facilitating oxygen and nutrient transfer,supporting cell attachment and growth with sufficient cell seeding *** this study,porous polyetheretherketone(PEEK)microcarriers coated with mineralized extracellular matrix(mECM),known for their chemical,mechanical and biological superiority,were developed for orthopedic *** PEEK microcarriers were derived from smooth microcarriers using a simple wet-chemistry strategy involving the reduction of carbonyl *** treatment simultaneously modified surface topology and chemical ***,the microstructure,protein absorption,cytotoxicity and bioactivity of the obtained porous microcarriers were *** deposition of mECM through repeated recellularization and decellularization on the surface of porous MCs further promoted cell proliferation and osteogenic ***,the mECM coated porous microcarriers exhibited excellent bone regeneration in a rat calvarial defect repair model in vivo,suggesting huge potential applications in bone tissue engineering.

关键词： polyetheretherketone porous microcarriers mineralized extracellular matrix cell expansion bone regeneration

Improved hemostatic effects by Fe^(3+)modified biomimetic PLLA cotton-like mat via sodium alginate grafted with dopamine

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Bioactive Materials 2021年第8期6卷 2346-2359页

作者： Caili Lv Linlong Li Zixue Jiao Huanhuan Yan zongliang wang Zhenxu Wu Min Guo Yu wang Peibiao Zhang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of Sciences5625 Renmin StreetChangchun130022PR China School of Applied Chemistry and Engineering University of Science and Technology of China96 Jinzhai RoadHefeiAnhui230026PR China University of Chinese Academy of Sciences 19 Yuquan RoadBeijing100049PR China

The development of an excellent,bioabsorbable hemostatic material for deep wound remains a *** this work,a biodegradable cotton-like biomimetic fibrous mat of poly(L-lactic acid)(PLLA)was made by melt ***,SD composite was prepared by cross-linking sodium alginate(SA)with dopamine(DA).It was immobilized on the fibre surface,which inspired by mussel ***,Fe^(3+)was loaded onto the 0.5SD/PLLA composite by chelation with the carboxyl of alginate and phenolic hydroxy of *** haemostasis experiment found that the hemostatic time 47 s in ***,the bleeding volume was 0.097 g and hemostatic time was 23 s when 20Fe^(3+)-0.5SD/PLLA was applied in the haemostasis of the rat *** a result of its robust hydrophilicity and bouffant cotton-like structure,it could absorb a large water from blood,which could concentrate the component of blood and reduce the clotting ***,the addition of Fe^(3+)in the 0.5SD/PLLA had a significant effect on improve hemostatic *** also displayed excellent antibacterial property for Escherichia coli and Staphylococcus ***,it possesses superior hemocompatibility,cytocompatibility and ***,20Fe^(3+)-0.5SD/PLLA has high potential application in haemostasis for clinical settings due to its outstanding properties.

关键词： PLLA Melt spinning Sodium alginate Fe^(3+) Hemostasis Antibacterial

Ameliorative Effect of Ginsenoside RT-5 on CDDP-Induced Nephrotoxicity

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Wuhan University Journal of Natural Sciences 2015年第4期20卷 343-349页

作者： JIANG Yongtao QIU Xiaolei MA Jinbo Lü Guangyao wang zongliang ZHANG Jingwen FU Fenghua wang Hongbo Key Laboratory of Molecular Pharmacology and Drug Evaluation Yantai University Binzhou Medical University State Key Laboratory of Bioactive Substances and Functions of Natural Medicines Institute of Materia MedicaCAMS&PUMC

The aim of this study is to explore whether RT-5, one novel active ginsenosides from Ginseng, has protective effects against cisplatin（CDDP）-induced nephrotoxicity in vivo. One model of acute renal failure induced by CDDP in rats and one model of xenograft tumors of human cervical cancer in nude mice are established. Four groups are assigned： control, CDDP, RT-5, CDDP plus RT-5, in which the RT-5 is administered via oral gavage 24 h before CDDP intraperitoneal injection. The significant increase in blood urea nitrogen and creatinine are induced by CDDP treatment at 6 mg/kg, which are attenuated by pre-treated with RT-5 at 10 mg/kg. RT-5 could ameliorate CDDP-induced morphological damages in kidney by PAS staining, and reduce tubular apoptosis evaluated by TUNEL staining. Pretreatment with RT-5 notably inhibits CDDP-induced oxidative stress in kidney tissues. Interestingly, RT-5 does not interfere with the in vivo anti-cancer effects of CDDP against the growth of xenograft tumors in nude mice. These data suggest that co-treatment RT-5 with CDDP might attenuate the following nephrotoxicity without inhibiting its anti-tumor efficiency, which could provide one novel strategy for cancer treatment in clinics.

关键词： nephrotoxicity ginsenosides RT-5 cisplatin(CDDP)

Wavelength Dispersion Analysis on Fiber-Optic Raman Distributed Temperature Sensor System

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Photonic Sensors 2013年第3期3卷 256-261页

作者： Weijie wang Jun CHANG Guangping LV zongliang wang Zhi LIU Sha LUO Shuo JIANG Xiangzhi LIU Xiaohui LIU Yongning LIU School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology and Application Shandong University Jinan 250100 P. R. China Institute of Automation Shandong Academy of Sciences Jinan 250014 China

The influence of the wavelength dispersion on the temperature accuracy of the Raman distributed temperature sensor system （RDTS） is analyzed in detail, and a simple correction algorithm is proposed to compensate the fiber position error caused by the wavelength dispersion. The principle of the proposed algorithm is described theoretically, and the correction on each point along the entire fiber is realized. Temperature simulation results validate that the temperature distortion is corrected and the temperature accuracy is effectively improved from ＋5 ℃ to ±1 ℃.

关键词： Distributed temperature sensor wavelength dispersion correction algorithm

Gaseous sulfur trioxide induced controllable sulfonation promoting biomineralization and osseointegration of polyetheretherketone implants

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Bioactive Materials 2020年第4期5卷 1004-1017页

作者： Teng Wan Zixue Jiao Min Guo zongliang wang Yizao Wan Kaili Lin Qinyi Liu Peibiao Zhang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022PR China Department of Orthopaedics The Second HospitalJilin UniversityChangchun130041PR China Institute of Advanced Materials East China Jiaotong UniversityNanchang330013PR China Department of Oral&Cranio-Maxillofacial Surgery Shanghai Ninth People's HospitalShanghai Jiao Tong University School of MedicineShanghai Key Laboratory of StomatologyShanghai Research Institute of StomatologyShanghai200011PR China University of Science and Technology of China Hefei230026PR China

Fabricating a desired porous structure on the surface of biomedical polyetheretherketone(PEEK)implants for enhancing biological functions is crucial and difficult due to its inherent chemical *** this study,a porous surface of PEEK implants was fabricated by controllable sulfonation using gaseous sulfur trioxide(SO3)for different time(5,15,30,60 and 90 min).Micro-topological structure was generated on the surface of sulfonated PEEK implants preserving original mechanical *** protein absorption capacity and apatite forming ability was thus improved by the morphological and elemental change with higher degree of *** combination of the appropriate micromorphology and bioactive sulfonate components,the cell adhesion,migration,proliferation and extracellular matrix secretion were obviously enhanced by the SPEEK-15 samples which were sulfonated for 15 *** from this study revealed that controllable sulfonation by gaseous SO3 would be an extraordinarily strategy for improving osseointegration of PEEK implants by adjusting the microstructure and chemical composition while maintaining excellent mechanical properties.

关键词： Polyetheretherketone Sulfonation Micro-topology Mechanical strength Osteointegration

Dual-channel mechano-phosphorescence:a combined locking effect with twisted molecular structures and robust interactions

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Light(Science & Applications) 2024年第4期13卷 738-746页

作者： zongliang Xie Zhu Mao Hailan wang Yuxin Xiao Xiayu Zhang Tao Yu Zhongfu An Wei Huang Frontiers Science Center for Flexible Electronics Xi’an Institute of Flexible Electronics&Xi’an Institute of Biomedical Materials and EngineeringNorthwestern Polytechnical University127 West Youyi RoadXi’an 710072China. Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518100China. Shenzhen Institutes of Advanced Electronic Materials Shenzhen 518100China. Key Laboratory of Flexible Electronics&Institute of Advanced Materials Nanjing Tech University30 South Puzhu RoadNanjing 211816China

Organic mechanoluminescence materials,featuring dual emission and ultralong phosphorescence characteristics,exhibit significant potential for applications in real-time stress sensing,pressure-sensitive lighting,advanced security marking techniques,and material breakage ***,due to immature molecular design strategies and unclear luminescence mechanisms,these materials remain rarely *** this study,we propose a valuable molecular design strategy to achieve dual-channel *** introducing the arylphosphine oxide group into a highly twisted molecular framework,enhanced intra-and intermolecular interactions could be achieved within rigid structures,leading to dual-channel mechanoluminescence with greatly promoted ultralong *** investigations reveal the substantial boosting effect of intra-and intermolecular interactions on mechanoluminescence and ultralong phosphorescence properties by locking the highly twisted molecular *** work provides a concise and guiding route to develop novel smart responsive luminescence materials for widespread applications in material science.

关键词： channel luminescence locking

Gas Absorption Center-Based Wavelength Calibration Technique in QEPAS System for SNR Improvement

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Photonic Sensors 2018年第4期8卷 358-366页

作者： zongliang wang Jun CHANG Qi LIU Cunwei TIAN Qinduan ZHANG School of Physics Science and Information Technology and Shandong Key Laboratory of Optical CommunicationScience and Technology Liaocheng University Liaocheng 252000 China School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology andApplication Shandong University Jinan 250100 China

A simple and effective wavelength calibration scheme is proposed in a quartz enhanced photoacoustic spectroscopy （QEPAS） system for trace gas detection. A reference gas cell is connected an InGaAs photodetector for detecting the absorption intensity peak caused by the gas to calibrate the gas absorption center using distributed feedback laser diode （DFB-LD） with sawtooth wave driver current. The gas absorption wavelength calibration and gas sensing operations are conducted at a special internal to eliminate the wavelength shift of DFB-LD caused by the ambient fluctuations. Compared with the conventional wavelength modulation spectroscopy （WMS）, this method uses a lower lock-in amplifier bandwidth and averaging algorithm to improve signal noise ratio （SNR）. Water vapor is chosen as a sample gas to evaluate its performance. In the experiments, the impact of sawtooth wave frequency and lock-in amplifier bandwidth on the harmonic signal is analyzed, and the wavelength-calibration technique-based system achieves a minimum detection limit （MDL） of 790ppbv and SNR with 13.4 improvement factor compared with the conventional WMS system.

关键词： QEPAS DFB-LD wavelength calibration fiber gas sensor