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Chemical Research in Chinese Universities 2012年第3期28卷 434-437页

作者： HAN song-zhe WU yu-ting ZHANG Meng JIAO Jia-jun School of Chemistry and Molecular Engineering East China University of Science and TechnologyShanghai 200237P.R.China

Structural properties of nucleobase underlie their ultrafast excited-state dynamics and low fluorescence quantum yields, which cause effectively nonradiative decay process and render them like sunscreens. Thus, eight guanine analogs[N-2-（2＇-nitrobenzoyl）-guanine, N-2-（3＇-nitrohenzoyl）-guanine, N-2-（4＇-nitrobenzoyl）-guanine, N-2-（2＇-hydroxybenzoyl）-guanine, N-2-（4＇-methoxylbenzoyl）-guanine, N-2-（4＇-chloricbenzoyl）-guanine, N-2-（4＇- me- thylicbenzoyl）-guanine and N-2-（3＇,5＇-dinitrobenzoyl）-guanine] with different substituted benzoyls, except N-2-（4＇-chloricbenzoyl）-guanine, were newly synthesized. In contrast with guanine, they exhibit wider ultraviolet absorbent range, higher molar extinction coefficient and lower fluorescence intensity.

关键词： Guanine Ultraviolet absorber Acidamide

Quantum Hierarchical Agglomerative Clustering Based on One Dimension Discrete Quantum Walk with Single-Point Phase Defects

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Computers, Materials & Continua 2020年第11期65卷 1397-1409页

作者： Gongde Guo Kai yu Hui Wang song Lin Yongzhen Xu Xiaofeng Chen College of Mathematics and Informatics Fujian Normal UniversityFuzhou350007China School of Computing and Mathematics University of UlsterNorthern IrelandBT370QBUK School of Electronic Information Science Fujian Jiangxia UniversityFuzhou350108China

As an important branch of machine learning,clustering analysis is widely used in some fields,e.g.,image pattern recognition,social network analysis,information security,and so *** this paper,we consider the designing of clustering algorithm in quantum scenario,and propose a quantum hierarchical agglomerative clustering algorithm,which is based on one dimension discrete quantum walk with single-point phase *** the proposed algorithm,two nonclassical characters of this kind of quantum walk,localization and ballistic effects,are *** first,each data point is viewed as a particle and performed this kind of quantum walk with a parameter,which is determined by its *** that,the particles are measured in a calculation *** terms of the measurement result,every attribute value of the corresponding data point is modified *** this way,each data point interacts with its neighbors and moves toward a certain center *** last,this process is repeated several times until similar data points cluster together and form distinct *** experiments on the synthetic and real world data demonstrate the effectiveness of the presented *** with some classical algorithms,the proposed algorithm achieves better clustering ***,combining quantum cluster assignment method,the presented algorithm can speed up the calculating velocity.

关键词： Quantum machine learning discrete quantum walk hierarchical agglomerative clustering

The Structure and Properties of Polyethylene Oxide Reinforced Poly(Metaphenylene Isophthalamide)Fibers

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Advanced Fiber Materials 2022年第3期4卷 436-447页

作者： Qingquan song Wenwen Wu Yi Wang Junrong yu Zuming Hu Yan Wang State Key Laboratory for Modifcation of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China

In this paper,the efect of poly(ethylene oxide)(PEO)as an additive on the structure and properties of poly(m-phenylene dimethylene terephthalamide)(PMIA)fbers obtained by wet spinning was *** tensile strength of the composite fbers was substantially enhanced compared to the pure PMIA *** was due to the fact that the addition of PEO weakens the hydrogen bonding between PMIA molecular chains resulting in an improved orientation of the composite *** was found that the optimum PEO addition was 2%and the tensile strength of the composite fber was 4.74 cN/dtex,which was 76%higher compared to the pure PMIA ***,the heat resistance and fame retardancy of the composite fbers were basically unchanged compared to the pure PMIA *** modifcation method is simple,with low raw material cost and good stability,and has not only good academic value but also excellent industrial value.

关键词： Poly(metaphenylene isophthalamide) Polyethylene oxide Mechanical properties Hydrogen bonding

Environment Adaptive Deep Learning Classification System Based on One-shot Guidance

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Computers, Materials & Continua 2022年第12期73卷 5185-5196页

作者： Guanghao Jin Chunmei Pei Na Zhao Hengguang Li Qingzeng song Jing yu School of Telecommunication Engineering Beijing PolytechnicBeijing100176China Department of Mathematics Wayne State UniversityDetroit48202MIUSA School of Computer Science and Technology Tiangong UniversityTianjin300387China

When utilizing the deep learning models in some real applications,the distribution of the labels in the environment can be used to increase the ***,to compute this distribution,there should be the validation set that is labeled by the ground *** the other side,the dependency of ground truths limits the utilization of the distribution in various *** this paper,we carried out a novel system for the deep learning-based classification to solve this ***,our system only uses one validation set with ground truths to compute some hyper parameters,which is named as one-shot ***,in an environment,our system builds the validation set and labels this by the prediction results,which does not need any guidance by the ground ***,the computed distribution of labels by the validation set selectively cooperates with the probability of labels by the output of models,which is to increase the accuracy of predict results on testing *** selected six popular deep learning models on three real datasets for the *** experimental results show that our system can achieve higher accuracy than state-of-art methods while reducing the dependency of labeled validation set.

关键词： Deep learning classification distribution of labels probability of labels

Synthesis, Crystal Structure and Non-covalent Interactions Analysis of Novel N-Substituted Thiosemicarbazone

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Chemical Research in Chinese Universities 2019年第3期35卷 471-477页

作者： ZHANG Xing HUANG Jie ZHANG yu QI Fan WANG Sifan song Jirong Shaanxi Key Laboratory of Physico-inorganic Chemistry School of Chemical Engineering Northwest UniversityXi'an 710069P.R.China ministry of Science and Technology the Palace MuseumBeijing 100009P.R.China

()*￡-1 -(4-Fluorobenzylidene)^l-(4-ethylphenyl)thiosemicarbazone was synthesized via the reaction of 4-(4-ethylphenyl)thiosemicarbazide and 4-fluorobenzaldehyde. The title compound was characterized by FTIR, and 13C NMR, mass spectrometry and elemental analysis techniques. Structural property of the title compound was displayed by the X-ray single crystal diffraction. The title compound crystallized in triclinic space group Pl witli a=0.6494(4) nm,a=0.7971(5) nm, c=1.5492( 10) nm,a=83.690( 11)°,β=84.185(10)。γ=84.348(11)。molecular formula Ci6H16FN3S,Mr=301.39,V=0.7868(9) nm^3, Z=2, Dc=1.272 g/cm……3,^000)=316,“=0.213 mm-1, 5=1.02, 7?=O.O513, and cw7[Z>2o(Z)]=0.1662. The intennolecular interactions in the crystal structure were explained using the Hirshfeld surface and their associated two-dimensional fingerprint plots. The title compound showed C-H-S(l-x,-y,-z) and NH(1-y,-z) intermolecular interactions, and formed the supramolecular self-assemblies through R2^2(12) and R2^2(8) ring motifs. Shape index and curvediiess were performed to further understand some unique weak interactions, for instance, the weakπ…π stacking contacts in molecular structure witli difierent characteristic regions. Besides, the reduced density gradient(RDG) function provided a real-space function for discussing non-covalent interactions within molecule, such as hydrogen bonds, weak van der Waals interactions and attractive or repulsive effects.

关键词： Novel N-substituted thiosemicarbazone Non-covalent interaction Reduced desity gradient(RDG) function Hirshfeld surface analysis

以爱之名,科学助残——合肥市残疾人康复中心设计

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工程建设与设计 2024年第19期 20-22页

作者：周宇健张锦松杨学淳中机第一设计研究院有限公司合肥230601

在国家对于社会残疾人事业愈发关注和投入日盛的背景下,合肥市残疾人康复中心项目应运而生,满足了合肥市以及周边地区日益提升的残疾人康复需求。论文以该项目为例,从项目特性、建筑意向、功能整合等多方面进行探讨。

关键词：残疾人康复中心无障碍设计场地规划

黄河上游兰州段SCCPs污染特征及来源解析

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中国环境科学 2024年第5期44卷 2526-2533页

作者：程景隆贾柠屹胡柏丞郭雨轩宋世杰赵渊毛潇萱兰州大学资源环境学院甘肃省环境污染预警与控制重点实验室甘肃兰州730000

对黄河上游兰州段2023年枯水期和丰水期水环境中短链氯化石蜡(SCCPs)的污染特征、来源和生态风险展开调查.研究区水相、悬浮颗粒相和沉积物中SCCPs浓度水平分别为116.04~1057.74ng/L、1.89~68.93μg/g(干重)和121.65~428.97ng/g(干重).... 详细信息

对黄河上游兰州段2023年枯水期和丰水期水环境中短链氯化石蜡(SCCPs)的污染特征、来源和生态风险展开调查.研究区水相、悬浮颗粒相和沉积物中SCCPs浓度水平分别为116.04~1057.74ng/L、1.89~68.93μg/g(干重)和121.65~428.97ng/g(干重).水相中SCCPs浓度丰水期高于枯水期,而悬浮颗粒相中SCCPs浓度枯水期则要高于丰水期,沉积物中SCCPs浓度在主要排污口下游以及河流较缓处枯水期高于丰水期,研究区可能存在丰水期排污量增加的情况;SCCPs同系物以C_(10)、C_(11)组分和Cl_(5-7)组分占比最高.研究区SCCPs污染可能主要源于CPs产品的生产和使用以及大气迁移传输,其污染贡献率分别为67.21%和32.79%.根据加拿大环境部的风险判定标准,研究区河水和沉积物中SCCPs污染暂未构成显著的生态风险,但悬浮颗粒相中SCCPs较高的浓度需得到应有的重视.

关键词：黄河短链氯化石蜡来源解析生态风险

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海洋汞同位素的研究范式及最新进展

矿物岩石地球化学通报 2024年第4期43卷 689-705,I0002页

作者：孙若愚李程皓李松旌王钊陈筱玮袁晶晶刘羿天津大学地球系统科学学院表层地球系统科学研究院天津300072

汞(Hg)是一种具有生物毒性且能够全球传输的重金属元素,在海洋环境中易转化为神经毒素甲基汞并沿食物网进行富集和放大,危害生态系统和人类健康。准确约束海洋汞的来源、迁移与转化是理解海洋汞循环的关键,对更新现有海洋汞循环模型和... 详细信息

汞(Hg)是一种具有生物毒性且能够全球传输的重金属元素,在海洋环境中易转化为神经毒素甲基汞并沿食物网进行富集和放大,危害生态系统和人类健康。准确约束海洋汞的来源、迁移与转化是理解海洋汞循环的关键,对更新现有海洋汞循环模型和制定相关环境政策具有重要价值。近十多年发展起来的汞稳定同位素技术为研究环境中的汞循环以及生态环境效应开辟了新视野。汞同位素独特的“三维”分馏模式,特别是非质量分馏(MIF),为研究海洋汞循环带来了科学范式的改变,取得了一系列重要发现。本文从海洋汞的来源以及甲基汞的生成、迁移与转化两大方面的应用系统阐述了近十多年来汞同位素体系在示踪海洋汞循环方面的主要进展,重点剖析了汞同位素在远洋大气汞沉降途径以及甲基汞循环方面的应用等近期研究热点。未来需结合更精细的汞同位素测试手段以及汞同位素分馏控制实验进一步明确海洋汞同位素分馏的主要控制因素,拓展汞同位素的应用空间。

关键词：汞稳定同位素非质量分馏甲基汞沉降途径深海

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Identification of ferroptosis as a novel mechanism for antitumor activity of natural product derivative a2 in gastric cancer

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Acta Pharmaceutica Sinica B 2021年第6期11卷 1513-1525页

作者： Ying Liu Zan song Yajie Liu Xubin Ma Wang Wang yu Ke Yichao Xu Dequan yu Hongmin Liu State Key Laboratory of Esophageal Cancer Prevention&Treatment Key Laboratory of Advanced Drug Preparation TechnologiesHenan Key Laboratory of Drug Quality Control&EvaluationSchool of Pharmaceutical SciencesZhengzhou UniversityMinistry of Education of ChinaZhengzhou 450001China State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

Ferroptosis is a type of cell death accompanied by iron-dependent lipid peroxidation,thus stimulating ferroptosis may be a potential strategy for treating gastric cancer,therapeutic agents against which are urgently *** oridonin A(JDA) is a natural compound isolated from Jiyuan Rabdosia rubescens with anti-tumor activity,unclear anti-tumor mechanisms and limited water solubility hamper its clinical ***,we showed a2,a new JDA derivative,inhibited the growth of gastric cancer ***,we discovered for the first time that a2 induced ***,compound a2 decreased GPX4 expression and overexpressing GPX4 antagonized the anti-proliferative activity of ***,we demonstrated that a2 caused ferrous iron accumulation through the autophagy pathway,prevention of which rescued a2 induced ferrous iron elevation and cell growth ***,a2 exhibited more potent anti-cancer activity than 5-fluorouracil in gastric canc er cell line-derived xenograft mice ***-derived tumor xenograft models from different patients displayed varied sensitivity to a2,and GPX4 downregulation indicated the sensitivity of tumors to ***,a2 exhibited well pharmacokinetic characteristic ***,our data suggest that inducing ferroptosis is the major mechanism mediating anti-tumor activity of a2,and a2 will hopefully serve as a promising compound for gastric cancer treatment.

关键词： Jiyuan Rabdosia rubescens JDA derivative Gastric cancer Ferroptosis ROS GPX4 Ferrous iron Autophagy

Versatile inorganic-organic hybrid WOx-ethylenediamine nanowires： Synthesis, mechanism and application in heavy metal ion adsorption and catalysis

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Nano Research 2014年第6期7卷 903-916页

作者： Wei Li Fang Xia Jin Qu Ping Li Dehong Chen Zhe Chen yu yu yu Lu Rachel A. Caruso Weiguo song Beijing National LaboratoryforMolecularSciences (BNLMS) Institute ofChemistry ChineseAcademyofSciences Beijing 100190 China CSIRO Materials Science and Engineering Private Bag 33 Clayton South Victoria 3169 Australia PFPC School of Chemistry The University of Melbourne Melbourne Victoria 3010 Australia

Inorganic-organic hybrid WOx-ethylenediamine （WO/-EDA） nanowires have been produced by a simple, low-cost and high-yield solvothermal method. These WO/-EDA hybrid nanowires have unique lamellar mesostructures with an alternate stacking of an interconnected [WO6] octahedral layer and a monolayer of ethylenediamine molecules. This hybrid structure integrated the functionality of ethylenediamine with the stability of the WOx frameworks. In situ synchrotron- radiation X-ray diffraction is used to elucidate a possible formation mechanism of the hybrid WOx-EDA. The nanowire morphology, lamellar structure and abundant functional amino groups endow them with versatile abilities. For example, in heavy metal ion adsorption the WOx-EDA nanowires display exceptional adsorption capabilities of 925 mg·g^-1 for Pb^2＋ and 610 mg·g^-1 for UO2^2＋. The nanowires also show outstanding stability and activity as a heterogeneous base catalyst in the Knoevenagel condensation reaction at room temperature. The catalyst can be recycled and reused for 20 cycles with nearly 100% yields. This study provides a new strategy to design inorganic-organic hybrid materials, and offers a multifunctional material that is a highly efficient adsorbent and sustainable catalyst.

关键词： WOx-ethylenediamine nanowires synchrotron-radiation X-ray diffraction heavy metal water treatment catalysis