Environmental Behavior of Organic Pollutants by Molecular Luminescence

[中文文摘]荧光光谱法作为一种测定痕量有机化合物和生化物质的高灵敏度和高选择性的测试手段 ,因其操作简单、运行成本低和非破坏性 ,在环境科学等方面得到了广泛的应用 .本文介绍了荧光光谱法研究PAHs与溶解态有机物间相互作用、同步荧光法研究溶解态PAHs的生物降解、荧光分析法直接研究溶解态PAHs的光降解以及用同步荧光法测定鱼胆汁中PAHs的代谢产物等几方面的工作 ,展示了荧光光谱法用于研究有机污染物的环境行为的应用前景。[英文文摘]As a high sensitive and relatively high selective method for determining the trace organic and biochemical compounds, the fluorometry has been widely applied in studies on environmental science due to its simplicity, low cost, and non-destructivity. The applications of fluorometry to the study on the environmental behavior of organic pollutants, including the study on the interactions between polycyclic aromatic hydrocarbons(PAHs) and dissolved organic matter by fluorometry, monitoring of biodegradation processes of pyrene(Py) by synchronous fluorometry , direct study of photolysis of dissolved PAHs by fluorometry and determination of 12hydroxy pyrene (12HP) in fish bile by synchronous fluorescence spectrometry were summarized. Experimental results showed that great future prospects of applications of fluorometry to the study on the environmental behavior of organic pollutants were demonstrated.国家自然科学基金项目 (20377035

Near Infrared Optical Detection System of Early Knee Osteoarthritis

膝骨性关节炎（kneeosteoarthritis，KOA）是一种多见于中老年人的骨关节病，它导致的痛苦和残疾严重地影响患者的生活质量。目前，常规的影像学方法，如X线平片，难以实现早期KOA的日常检测。近红外光谱（NearInfraredSpectroscopy,NIRS）技术可实现对早期OA软骨成分含量变化的检测。本文旨在研究出一套安全、无创、低成本、能对早期KOA进行实时在体检测的系统。 首先，本文跟踪了NIRS技术的发展和应用现状，以修正朗伯-比尔定律为基本原理，构建了膝关节软骨水含量的计算模型。 接着，用Videman造模法获得家兔KOA模型，研究了不同OA阶段近红外光谱的变化情况...Osteoarthritis (OA) is a kind of chronic joint diseases that is common in elderly people. It causes pains and disabilities which would seriously affect the sufferers’ life. At present, the conventional imaging methods, such as X-ray, are difficult to fulfill early OA detection daily. Near infrared spectroscopy (NIRS) can detect concentration changes of articular cartilage in early OA lesion. The p...学位：工学硕士院系专业：物理与机电工程学院_机械电子工程学号：1992011115275

Optical Imaging Methods for Early Detection of Osteoarthritis

介绍了光学相干层析成像技术、扩散光学层析成像技术和光声层析成像技术3种早期骨性关节炎光学成像检测技术.和X线平片常规影像诊断技术相比,光学相干层析成像技术可测量软骨的厚度,检测胶原结构的微小变化;扩散光学层析成像技术能测量软骨、滑液等结构的厚度和相应的吸收系数和散射系数;光声层析成像技术可探测胶原纤维网的恶化、变浑浊的滑液、骨的代谢功能障碍和软骨下骨的代谢过旺.最后对这3种成像检测技术的应用前景及早期骨性关节炎检测方法作了简要展望.Three kinds of optical imaging methods for early OA detection were reviewed in this paper,which are Optical Coherence Tomography(OCT),Diffuse Optical Tomography(DOT)and Photoacoustic Tomography(PAT).Compared with conventional imaging diagnostic techniques such as x-ray radiography,OCT can measure cartilage thickness and detect small changes of collagen structure;DOT is able to measure thickness,absorption coefficient and scattering coefficient of cartilage and synovial membrane/fluid;PAT could determine collagen fibril network deterioration,increased turbidity of synovial membrane/fluid,metabolic dysfunction of bone and high metabolism of subchondral bone.A brief outlook of these three methods application prospects was given in the end.TheNationalNaturalScienceFoundationofChina(Nos.61172046); NaturalScienceFoundationofFujianProvinceofChina(No:2011J01363

Room Temperature Phosphorescence of α-Bromonaphthalene Induced by β-Cyclodextrin in the Presence of Hexahydropyridine

[中文摘要]微量六氢吡啶(HHP)存在下,由于三元包络物α-溴代萘(-αB rN)/β-环糊精(-βCD)/HHP的形成,不经除氧就可观察到强而稳定的室温磷光(RTP)发射。详细研究了温度、pH值以及形成包络物的3种组分物质的浓度的变化对体系RTP的影响。在优化实验条件下,体系的RTP强度与-αB rN的浓度在2.0~20.0μmol/L范围内呈良好线性关系,α-B rN的检出限3.7×10-8mol/L。将所建方法用于合成样品中-αB rN的测定,实验结果表明该方法的加标回收率为92.4%;相对标准偏差小于1.57%(n=7)。[英文摘要]A strong and stable room temperature phosphorescence(RTP) emission was observed from the ternary inclusion complex of α-bromonaphthalene(α-BrN)/β-cyclodextrin(β-CD)/hexahydropyridine(HHP) without deoxygenation from solution in the presence of micro amount of HHP.The effects of temperature,pH values and the variation of concentrations of each component on RTP had been investigated.Under the optimal conditions,the analytical curve of α-BrN gives a liner dynamic range of 2.0-20.0 μmol/L with a detection limit of 3. 7 ×10- 8 mol/L. The experimental results demonstrated that the recovery of the proposed method was 92.4% with a relative standard deviation less than 1. 57% ( n = 7).国家自然科学基金资助项目(No20577037

Room temperature phosphorescence of alpha-bromonaphthalene induced by beta-cyclodextrin in the presence of hexahydropyridine

A strong and stable room temperature phosphorescence (RTP) emission. was observed from: the ternary inclusion complex of alpha-bromonaphthalene (alpha-BrN)/beta-cyclodextrin (beta-CD)/hexahydropyridine (HHP) without deoxygenation from solution in the presence of micro amount of HHP. The effects of temperature, pH values and the variation of concentrations of each component on RTP had been investigated. Under, the optimal conditions, the analytical curve of alpha-BrN gives a liner dynamic range of 2.0 - 20.0 mu mol/L with a detection limit of 3.7 x 10(-8) mol/L. The experimental results demonstrated that the recovery of the proposed method was 92.4% with a relative standard deviation less than 1.57% (n =7)

Power system abnormal data identification method

本发明涉及一种电力系统异常数据辨识方法，包括将电力系统正常数据作为训练样本，训练神经网络；将待检测数据输入训练后的神经网络，获得残差序列；基于仿射传播聚类算法对残差训练进行聚类；根据各个类别的特征和类内距离进行异常数据判断。本发明利用混沌粒子群算法来进行神经网络训练，同时采用仿射传播聚类算法来实现数据聚类，能够显著降低计算量，同时不依赖采样分布，有效地提高了电力系统异常数据辨识的准确性

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel