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The preparation and performance of visible-light-sensitized luminescent nanoparticles based on europium complex

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Chinese Chemical Letters 2014年第2期25卷 247-252页

作者： fu-Min Xue Ming-Hui liang Zhen-Hua Wang ling-Yu Luan fu-wei li Yan Cheng Guang-Sheng Shao Shandong Provincial Analysis and Test Center ShanDong Academy of Science National Center for Nanosicence and Technology China Banknote Ink Company

Long-wavelength-sensitized luminescent materials are desired for bio-detection. In this paper, we prepared a new kind of luminescent europium nanoparticles by a co-precipitation-condensation method. The luminescent europium complex Eu（tta）*** （tta = thenoyltrifluoroacetonate; bpt = 2-（N,N- di-ethylanilin-4-yl）-4,6-bis（pyrazol-l-yl）-l,3,5-triazine） was used as the active material, being encapsulated in the nanoparticles formed from 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane （PFOTS） and poly（styrene-co-methyl methacrylate） [P（ST-co-MMA）]. The prepared nanoparticles not only can be well dispersed in water but also were of high photostability. Importantly, the nanoparticles displayed maximal excitation wavelength at 425 nm as well as an extended excitation wavelength up to 480 nm and a quantum yield for Eu3＋ luminescence of 0.22 （λex= 425 nm, room temperature）.

关键词： Long-wavelength-sensitized luminescence Europium nanoparticles Co-precipitation-condensation Bio-detection

Quantum public-key crypto via EPR pairs

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 58-63页

作者： Xiang-Qun fu Hong-wei li Jian-Hong Shi Tan li Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography Information Engineering University Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China

With the development of quantum computing technology, quantum public-key cryptography is gradually becoming an alternative to the existing classical public-key cryptography. This paper designs a quantum trapdoor one-way function via EPR pairs and quantum measurements. Based on this, a new quantum public-key cryptosystem is presented, which offers forward security,and can resist the chosen-plaintext attack and chosen-ciphertext attack. Compared with the existing quantum public-key cryptos,eavesdropping can be automatically detected in this new quantum public-key cryptosystem under a necessary condition, which is also detailed in the paper.

关键词： quantum public-key crypto trapdoor one-way function EPR pairs

Thermodynamics and performance of Al/CuO nanothermite with different storage time

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Defence Technology（防务技术） 2021年第3期17卷 741-747页

作者： Cheng-ai Wang Jian-bing Xu Yun Shen Yue-ting Wang Teng-long Yang Ze-hua Zhang fu-wei li Rui-qi Shen Ying-hua Ye School of Chemical Engineering Nanjing University of Science&TechnologyNanjing210094People’s Republic of China Micro-Nano Energetic Devices Key Laboratory of MIIT Nanjing210094People’s Republic of China

The storage stability of energetic materials is important for its application. Here, the storage stability of Al/CuO nanothermite, which was prepared by electrospray method and stored with different storage time, was systematically researched. The activation energy of Al/CuO nanothermite was calculated by differential scanning calorimetry(DSC). The ignition temperature and the curve pressure history of Al/Cu O nanothermite was measured using ignition temperature measuring device and constant-volume pressurization tests, respectively. further, the thermites were characterized by X-ray Diffractometer(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscope(SEM) and Transmission electron microscopy(TEM). The results show that the morphology of the thermites did not change significantly. The activation energy was decreased from 254.1 k J/mol to 181.8 k J/mol after storage for 13 months. When stored for 0, 7 and 13 months, the peak pressures of Al/CuO nanothermite were 685.8 k Pa,626.3 k Pa and 625.5 k Pa, respectively. In addition to the ignition temperature, it was 775 ℃, 739 ℃ and754 ℃, respectively. This result indicated that the ignition and combustion properties of Al/CuO nanothermite are obviously reduced when stored for a long time, at room temperature.

关键词： Al/CuO Nanothermites Stroage stability Thermodynamics

Fabrication and characterization of AleCuO nanocomposites prepared by sol-gel method

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Defence Technology（防务技术） 2021年第4期17卷 1307-1312页

作者： Yue-ting Wang Xiao-ting Zhang Jian-bing Xu Yun Shen Cheng-ai Wang fu-wei li Ze-hua Zhang Jian Chen Ying-hua Ye Rui-qi Shen Department of Applied Chemistry School of Chemical EngineeringNanjing University of Science and TechnologyNanjing210094China Anhui Xinhe Defense Equipment Technology Corporation limited Anhui230000China

In this study,AleCuO nanocomposites were fabricated by sol-gel *** a contrast,the thermite was prepared by physical mixing at the equivalence ratio of 0.5,1,2,*** intermediates and samples as prepared were characterized by SEM and *** exothermic properties of the two samples prepared at different equivalence ratios were tested and the reaction products were characterized by *** SEM results show that the sample prepared by the sol-gel method demonstrates a micron-sized agglomerated sphere formed by a mutual wrapping of Al NPs and CuO NPs,and the particles are evenly distributed in the *** addition,when the content of Al powder is seriously insufficient,the heat release of the sample prepared by physical mixing is 1.6 times that of by sol-gel *** the increase of Al powder content,the exothermic properties of Al/CuO NPs prepared by sol-gel method began to increase significantly compared with physical mixing and the difference is 1.5 times when the equivalence ratio increases to *** can be concluded that the reason for this result may be attributed to the different mass transfer modes of components due to the different morphologies of samples.

关键词： Nanothermite Energetic materials Sol-gel Characterization

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光纤色散法测量闪烁体脉冲光谱

光学精密工程 2012年第2期20卷 264-269页

作者：魏福利王培伟西北核技术研究所陕西西安710024

提出了一种利用光纤波长色散测量脉冲光谱的方法。由于具有较宽光谱的脉冲光在一定长度的光纤中传播时会发生波形展宽,需要根据测量和标定结果校正展宽的波形才能得到光源的实际光谱曲线。标定时首先利用ps级脉冲光源对测量系统进行时... 详细信息

提出了一种利用光纤波长色散测量脉冲光谱的方法。由于具有较宽光谱的脉冲光在一定长度的光纤中传播时会发生波形展宽,需要根据测量和标定结果校正展宽的波形才能得到光源的实际光谱曲线。标定时首先利用ps级脉冲光源对测量系统进行时间响应标定,得到系统的时间响应函数;接着测量不同波长光的走时,得到不同波长的群折射率;最后测量光纤中的光谱衰减,得到各种波长的相对衰减或传输效率。利用以上3个标定结果,对波形进行数字逆卷积,并进行走时校正和衰减系数校正,即可对所得到的波形进行恢复。经实验测量和数据处理,得到了一种红光闪烁体的发光光谱曲线,其中心波长与用其他方法测到的中心波长的差小于2nm,谱线形状基本一致。研究显示,在脉冲光的脉冲宽度远小于其色散展宽时,可以利用光纤的波长色散对脉冲光的光谱进行测量。

关键词：光纤色散脉冲光谱发光光谱闪烁体

Proliferation and apoptosis property of mesenchymal stem cells derived from peripheral blood under the culture conditions of hypoxia and serum deprivation

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Chinese Medical Journal 2011年第23期124卷 3959-3967页

作者： fu wei-li JIA Zhu-qing WANG wei-ping ZHANG Ji-ying fu Xin DUAN Xiao-ning LEUNG Kevin Kar Ming ZHOU Chun-yan YU Jia-kuo Institute of Sports Medicine Peking University Third Hospital Beijing 100191 China

Background The proliferation and apoptosis property of mesenchymal stem cells derived from peripheral blood （PB-MSCs） were investigated under hypoxia and serum deprivation conditions in vitro so as to evaluate the feasibility for autologous PB-MSCs applications in cartilage repair. Methods MSCs were mobilized into peripheral blood by granulocyte colony stimulating factor （G-CSF） and AMD3100. The blood samples were collected from central ear artery of rabbits. Adhered cells were obtained by erythrocyte lysis buffer and identified as MSCs by adherence to plastic, spindle shaped morphology, specific surface markers, differentiation abilities into osteoblasts, adipocytes and chondroblasts in vitro under appropriate conditions. MSCs were cultured in four groups at different oxygen tension （20% 02 and 2% O2）, with or without 10% fetal bovine serum （FBS） conditions： 20% 02 and 10% FBS complete medium （normal medium, N）, 20% 02 and serum deprivation medium （D）, 2% 02 and 10% FBS complete medium （hypoxia, H）, 2% 02 and serum deprivation （HD）. Cell proliferation was determined by CCK-8 assay. Apoptosis was detected by Annexin V/PI and terminal deoxynucleotide transferase dUTP nick end labeling （TUNEL） staining. Results Spindle-shaped adherent cells were effectively mobilized from peripheral blood by a combined administration of G-CSF plus AMD3100. These cells showed typical fibroblast-like phenotype similar to MSCs from bone marrow （BM-MSCs）, and expressed a high level of typical MSCs markers CD29 and CD44, but lacked in the expression of hematopoietic markers CD45 and major histocompatibility complex Class II （MHC II）. They could also differentiate into osteoblasts, adipocytes and chondroblasts in vitro under appropriate conditions. No significant morphological differences were found among the four groups. It was found that hypoxia could enhance proliferation of PB-MSCs regardless of serum concentration, but serum deprivation inhibited proliferation at the later stage of cul

关键词： mesenchymal stem cells derived from peripheral blood hypoxia serum deprivation proliferation apoptosis

威廉斯的道德自我沉溺理论及其对当代中国道德教育改革的启示

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高等教育研究 2023年第4期44卷 17-23页

作者：傅维利深圳大学湾区教育研究院广东深圳518052

伯纳德·威廉斯把人的道德行为动机分为两阶,并认为若个体仅仅关注强化或维护自我道德形象的二阶目标就会导致道德自我沉溺。威廉斯的道德自我沉溺理论颇有新意,但存在两个尚未解决的重要问题。应当认识到:群体中人的一阶目标与二阶目... 详细信息

伯纳德·威廉斯把人的道德行为动机分为两阶,并认为若个体仅仅关注强化或维护自我道德形象的二阶目标就会导致道德自我沉溺。威廉斯的道德自我沉溺理论颇有新意,但存在两个尚未解决的重要问题。应当认识到:群体中人的一阶目标与二阶目标的构成关系存在从低到高的序列性发展形态;道德自我沉溺是内外两种力量共同作用的结果。综合以上认识,解决我国道德教育中的相关问题,应改革现行的评优表彰制度,逐步剔除其中容易引发学生出现道德自我沉溺倾向的外在诱导因素;改革现行的道德动机教育目标和方式,引导学生始终保持正确的道德发展方向。

关键词：伯纳德·威廉斯道德自我沉溺道德动机表奖制度

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高校学术评委的伦理困境及破解对策

清华大学教育研究 2022年第5期43卷 30-36页

作者：傅维利深圳大学湾区教育研究院广东深圳518060

学术评审伦理指的是,评委在评审工作中处理各种相关关系时所遵循的基本价值理念和行为准则。当前,高校学术评委面临的伦理困境主要有:公德与私德的冲突,不同学术伦理立场的纠结,学术评审权力与责任关系失衡引发的焦虑。破解对策是:坚持... 详细信息

学术评审伦理指的是,评委在评审工作中处理各种相关关系时所遵循的基本价值理念和行为准则。当前,高校学术评委面临的伦理困境主要有:公德与私德的冲突,不同学术伦理立场的纠结,学术评审权力与责任关系失衡引发的焦虑。破解对策是:坚持把伦理素养和学术素养作为选拔评委不可或缺的两个基本标准;抓好评委和领导干部两个关键少数的培训工作,以此引领风清气正的评审风气;协同运用技术、制度和道德三种约束、引领力量;以责任为逻辑起点,统筹平衡好评审权力和责任的关系,强化对评审失范行为的惩处力度。

关键词：学术评委伦理困境权力和责任公德与私德

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家庭教育资本的本质属性及投资风险管控

教育学报 2021年第6期17卷 134-145页

作者：傅维利深圳大学湾区教育研究院广东深圳518052

家庭教育资本是在内外部约束要素允许的条件下,家庭通过购买、置换等方式有目的地从外部获得的用于子女教育以取得预期教育收益的家庭教育资源。家庭教育投资具有收益多重性、持续性等特点,也蕴含一定风险。其风险主要有教育责任不当转... 详细信息

家庭教育资本是在内外部约束要素允许的条件下,家庭通过购买、置换等方式有目的地从外部获得的用于子女教育以取得预期教育收益的家庭教育资源。家庭教育投资具有收益多重性、持续性等特点,也蕴含一定风险。其风险主要有教育责任不当转嫁的风险、违反教育规律风险、投资收益误判风险、政策变动风险以及违反法律法规风险等。家庭教育投资风险管控的原则主要有家庭教育责任担当原则,把遵循教育规律放到风险管控重要位置的原则,信息分析、法规政策研判先行原则,量力而行的原则,及时精准投入的原则。

关键词：家庭教育资本风险管控资本本质属性家庭教育投资