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Density Structure of the Papua New Guinea-Solomon Arc Subduction System

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中国海洋大学学报:英文版 2023年第5期22卷 1269-1276页

作者： xu Chong XING Junhui GONG Wei ZHANG Hao xu Haowei xu xiaoyu Key Laboratory of Submarine Geosciences and Prospecting Techniques MOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China QiLu Research Institute Aerospace Information Research Institute Chinese Academy of SciencesJinan 250002China

The Papua New Guinea-Solomon(PN-SL)arc is one of the regions with active crustal motions and strong geological actions.Thus,its complex subduction system makes it an ideal laboratory for studying the initiation mechanism of plate subduction.However,the PN-SL subduction system has not yet been sufficiently studied,and its density structure has yet to be revealed.In this paper,we used the free-air gravity data,Parker-Oldenburg density surface inversion method,and the genetic algorithm density inversion method to obtain the density structure of an approximately 1000-km-long northwest-southeast line crossing the PN-SL subduction system under the constraints of the CRUST1.0 global crustal model,onshore seismic data,and the LLNL-G3Dv3 global P-wave velocity model.The density structure shows that density differences between the plates on the two sides of the trench could play a significant role in plate subduction.

关键词： Papua New Guinea-Solomon plate subduction gravity anomaly density structure genetic algorithm

Aerosol deposition technology and its applications in batteries

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Nano Materials Science 2024年第1期6卷 24-37页

作者： Xinyu Wang Ramon Alberto Paredes Camacho xiaoyu xu Yumei Wang Yi Qiang Hans Kungl Ruediger-AEichel Yunfeng Zhang Li Lu National University of Singapore(Chongqing)Research Institute Chongqing401123PR China National University of Singapore Singapore117576 Fundamental Electrochemistry(IEK-9) Institute of Energy and Climate ResearchForschungszentrum Jülich52425JülichGermany

Aerosol deposition(AD)method is a kind of additive manufacturing technology for fabricating dense films such as metals and ceramics at room temperature.It resolves the challenge of integrating ceramic films onto temperaturesensitive substrates,including metals,glasses,and polymers.It should be emphasized that the AD is a spray coating technology that uses powder without thermal assistance to generate films with high density.Compared to the traditional sputter-based approach,the AD shows several advantages in efficiency,convenience,better interfacial bonding and so on.Therefore,it opens some possibilities to the field of batteries,especially all-solidstate batteries(ASSBs)and draws much attention not only for research but also for large scale applications.The purpose of this work is to provide a critical review on the science and technology of AD as well as its applications in the field of batteries.The process,mechanism and effective parameters of AD,and recent developments in AD applications in the field of batteries will be systematically reviewed so that a trend for AD will be finally provided.

关键词： Aerosol deposition Room temperature impact consolidation Ceramic film All-solid-state battery Spray coating technology

Analysis of morphological characteristics of gravels based on digital image processing technology and self-organizing map

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Journal of Arid Land 2023年第3期15卷 310-326页

作者： xu Tao YU Huan QIU Xia KONG Bo XIANG Qing xu xiaoyu FU Hao College of Earth Science Chengdu University of TechnologyChengdu 610059China Beijing SuperMap Software Co. Ltd.Beijing 100015China Sichuan Real Estate Registration Center Chengdu 610014China Chengdu Institute of Mountain Land and Disasters Chinese Academy of SciencesChengdu 610041China School of Earth Systems and Sustainability Southern Illinois University CarbondaleCarbondaleIL 62901United States of America Environmental Resources and Policy Southern Illinois University CarbondaleCarbondaleIL 62901United States of America Sichuan Institute of Land and Space Ecological Restoration and Geohazard Prevention Chengdu 610081China

A comprehensive understanding of spatial distribution and clustering patterns of gravels is of great significance for ecological restoration and monitoring.However,traditional methods for studying gravels are low-efficiency and have many errors.This study researched the spatial distribution and cluster characteristics of gravels based on digital image processing technology combined with a self-organizing map(SOM)and multivariate statistical methods in the grassland of northern Tibetan Plateau.Moreover,the correlation of morphological parameters of gravels between different cluster groups and the environmental factors affecting gravel distribution were analyzed.The results showed that the morphological characteristics of gravels in northern region(cluster C)and southern region(cluster B)of the Tibetan Plateau were similar,with a low gravel coverage,small gravel diameter,and elongated shape.These regions were mainly distributed in high mountainous areas with large topographic relief.The central region(cluster A)has high coverage of gravels with a larger diameter,mainly distributed in high-altitude plains with smaller undulation.Principal component analysis(PCA)results showed that the gravel distribution of cluster A may be mainly affected by vegetation,while those in clusters B and C could be mainly affected by topography,climate,and soil.The study confirmed that the combination of digital image processing technology and SOM could effectively analyzed the spatial distribution characteristics of gravels,providing a new mode for gravel research.

关键词： self-organizing map digital image processing morphological characteristics multivariate statistical method environmental monitoring

环保投资对第二类代理成本的影响——兼论内部控制的调节效应

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南京审计大学学报 2024年第2期21卷 46-57页

作者：吴良海徐小玉安徽工业大学商学院安徽马鞍山243032

基于我国2011—2021年沪深A股上市公司数据,实证分析了环保投资、内部控制与第二类代理成本三者之间的关系。结果表明:环保投资有利于第二类代理成本的降低,且内部控制对环保投资降低第二类代理成本具有抑制作用。机制检验表明,环保投... 详细信息

基于我国2011—2021年沪深A股上市公司数据,实证分析了环保投资、内部控制与第二类代理成本三者之间的关系。结果表明:环保投资有利于第二类代理成本的降低,且内部控制对环保投资降低第二类代理成本具有抑制作用。机制检验表明,环保投资能够通过提高公司信息透明度和提升ESG表现降低第二类代理成本。进一步分析发现,环保投资对第二类代理成本的影响在外部监督压力大、非重污染和大股东“掏空”动机较低企业显著,且内部控制的抑制作用在外部监督压力弱和大股东“掏空”动机低组企业显著,而在其他方面并不具有显著性差异。研究从经济后果视角揭示了环保投资所具有的公司治理功效,这对于“双碳”战略践行、公司治理效率提升以及投资者利益保护均有现实意义。

关键词：环保投资第二类代理成本内部控制公司信息透明度 ESG表现公司治理效率

季铵盐化糖原衍生物/明胶复合水凝胶抗菌材料的制备及性能

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精细化工 2024年第3期41卷 597-606页

作者：纪倩徐晓宇陈曦陈敬华江南大学生命科学与健康工程学院江苏无锡214122

首先,利用乙二胺对糖原进行氨基化修饰得到氨基化糖原衍生物(N-Gly);接着,利用2,3-环氧丙基三甲基氯化铵(简称季铵盐)对N-Gly进行部分季铵盐化修饰,得到季铵盐化糖原衍生物(QA-N-Gly);然后,以明胶为基材通过酰胺键交联制备季铵盐化糖原... 详细信息

首先,利用乙二胺对糖原进行氨基化修饰得到氨基化糖原衍生物(N-Gly);接着,利用2,3-环氧丙基三甲基氯化铵(简称季铵盐)对N-Gly进行部分季铵盐化修饰,得到季铵盐化糖原衍生物(QA-N-Gly);然后,以明胶为基材通过酰胺键交联制备季铵盐化糖原衍生物/明胶复合水凝胶(QA-N-Gly/Gel)。对糖原衍生物进行FTIR、1HNMR、粒径、Zeta电位以及微观形貌的考察,并对QA-N-Gly/Gel水凝胶进行了理化性能和生物性能评价。结果表明,糖原的氨基化和季铵盐化修饰成功,QA-N-Gly为均匀分散的纳米粒子,粒径分布在100~200 nm,Zeta电位为(93.9±1.7)m V,粒子带有明显的正电荷,具有抗菌性。糖原衍生物的加入可以提高明胶基水凝胶体系的机械强度和稳定性,QA-N-Gly/Gel的断裂应力为66.8 kPa,压缩模量为13.3 kPa。QA-N-Gly/Gel具有明显的抑菌作用,对金黄色葡萄球菌和大肠杆菌的抑菌率分别达到97%和50%。此外,QA-N-Gly/Gel无溶血性,细胞毒性低,NIH-3T3细胞的48 h存活率在80%以上。

关键词：糖原季铵盐明胶水凝胶抗菌材料功能材料

消费者偏好信息不对称下合同制造商高质量入侵策略研究

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运筹与管理 2024年第4期33卷 218-225,I0082-I0086页

作者：闵杰徐小禹欧剑曹宗宏安徽建筑大学数理学院安徽合肥230601

考虑由一个合同制造商(Contract Manufacturer, CM)和一个原始设备制造商(Original Equipment Manufacturer, OEM)组成的二级供应链,CM在为OEM代工的同时,也引入自己的品牌与OEM竞争。在OEM能够获取消费者质量偏好信息的前提下,分析不... 详细信息

考虑由一个合同制造商(Contract Manufacturer, CM)和一个原始设备制造商(Original Equipment Manufacturer, OEM)组成的二级供应链,CM在为OEM代工的同时,也引入自己的品牌与OEM竞争。在OEM能够获取消费者质量偏好信息的前提下,分析不同信息结构和CM高质量入侵行为对供应链成员定价决策的影响。研究发现,(1)CM入侵总是对自身有利,而对OEM不利。(2)信息不对称始终损害CM的利益,但只有在CM入侵且高低偏好市场之间的差异较大时才损害OEM的利润。(3)若真实市场偏好较高,且不掌握信息的CM对市场信心较弱,则OEM产品的定价能使所有消费者的需求都得到满足。(4)提高代工产品的质量在CM不入侵或者信息对称下对CM有利,而其余情况下是否有利与CM销售成本有关。进一步讨论了消费者偏好信息的作用,发现多数情况下OEM不获取消费者信息对自身更有利。

关键词：合同制造商入侵消费者偏好信息不对称信号博弈

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基于v3洋葱域名的比特币地址威胁程度分析

计算机工程 2024年第3期50卷 173-181页

作者：胡锦枫徐晓瑀陈云芳张伟南京邮电大学计算机学院江苏南京210023 江苏省联创软件研究院江苏南京210036

比特币可以在不透露使用者身份的情况下进行交换,导致其成为不法分子在暗网上进行违法活动的主要方式。为了追踪比特币非法交易,传统方法根据比特币的伪匿名性,在整个区块链上进行启发式地址聚类,没有充分利用比特币地址在暗网上的信息... 详细信息

比特币可以在不透露使用者身份的情况下进行交换,导致其成为不法分子在暗网上进行违法活动的主要方式。为了追踪比特币非法交易,传统方法根据比特币的伪匿名性,在整个区块链上进行启发式地址聚类,没有充分利用比特币地址在暗网上的信息。2021年Tor官方全面启用v3洋葱域名,使得以往的v2洋葱域名数据无法再作为分析的依据。设计并实现基于v3洋葱域名的比特币地址威胁程度的一体化分析框架TLAFDB。信息收集模块使用境外服务器解决地域限制并设置socks5h代理以支持暗网爬虫运行,使用洋葱种子地址在暗网中爬行收集最新的v3洋葱域名数据,信息清洗模块采用可同时覆盖Base58和Bech32编码的正则表达式以提取v3洋葱域名网页中的比特币地址,通过区块链搜索引擎***筛选存在真实交易的比特币地址,并建立其和所在v3洋葱域名的关联关系,信息分析模块采用人工分析和关键词匹配相结合的方法分类v3洋葱域名,赋予其关联的比特币地址类别和流行度并判定威胁程度。实验结果表明,TLAFDB收集了23627个v3洋葱域名网页,提取并分析1141个存在真实交易的比特币地址的类别、流行度和威胁程度,发现在暗网中同一个比特币地址常出现在大量的镜像洋葱域名网页上,超过95%的比特币地址被恶意使用,并且庞氏骗局交易量占高危比特币地址总交易量的99%。

关键词：暗网爬虫 v3洋葱域名比特币地址分类

Construction of Hsp90β gene specific silencing plasmid and its transfection efficiency

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Frontiers of Medicine 2007年第3期1卷 253-257页

作者： JI Yewei NIE Bin LI Ping xu xiaoyu ZHOU Yuanguo Molecular Biology Center Research Institute of Surgerythe Third Military Medical UniversityChongqing 400042China College of Pharmacology Chongqing University of Medical ScienceChongqing 400016China Department of Experiment Chongqing University of Medical ScienceChongqing 400016China

The purpose of this work was to construct the plasmid that could direct the synthesis of siRNA-like transcripts and thus mediate strong and specific repression of human heat shock protein 90β(Hsp90β)gene expression and to compare the transfection efficiency of the plasmids in varying conditions of transfection.Three 64 nt oligos corresponding to different regions of the target gene were chemically synthesized and annealed and were then ligated with pSUPER EGFP1 plasmid and double-digested with HindIII and BglII.Recombinant plasmids were transformed into Escherichia coli,DH5a,and the colonies were picked and grown in the Amp-agarose.The presence of positive clones was checked by the means of endodigestion and sequencing.Three cell strains,HepG2,Human umbilicus vein endothelium cells(HUVEC)and HeK293,were cultured.Then the plasmids were transfected into the cells at different ratios of plasmid to Lipofectamine.The transfection efficiency was measured by detection of enhanced green fluorescence protein(EGFP).The presence of positive recombinant clones were verified by double-digestion and sequencing.The bases inserted into the plasmids were correct and the positive colonies were named pSuper-Hsp90β1,pSuper-Hsp90β2 and pSuper-Hsp90β3.After optimizing the ratio of plasmid to Lipofectamine,we achieved high transfection efficiency in HeK293 cells.Transfection efficiency was still low in the HepG2 cells.In conclusion,the si-RNA-synthesizing plasmids targeting Hsp90βwere constructed and transfected into cells with different transfection efficiency.

关键词： HSP90 heat-shock proteins RNA interference transfection

“身份误认”、梦中梦与铁手——论鲁迅《弟兄》中的几个果戈理要素

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绍兴文理学院学报 2024年第1期44卷 9-15页

作者：徐晓宇江苏大学文学院江苏镇江212013

鲁迅小说《弟兄》采用了“身份误认”的情节模式,与果戈理《钦差大臣》中的情节设置十分相近;主角张沛君的梦境在诸多细节上与果戈理《肖像》中的“梦中梦”一致,而梦中张沛君关键的躯体特征——“铁手”——可能源于果戈理《维》中的... 详细信息

鲁迅小说《弟兄》采用了“身份误认”的情节模式,与果戈理《钦差大臣》中的情节设置十分相近;主角张沛君的梦境在诸多细节上与果戈理《肖像》中的“梦中梦”一致,而梦中张沛君关键的躯体特征——“铁手”——可能源于果戈理《维》中的妖怪维。小说中三者共同服务于暴露隐秘的罪恶,这同样也是果戈理的宗教思想在创作中力图达到的目的。

关键词：鲁迅果戈理《弟兄》《钦差大臣》《肖像》《维》