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基于地缘环境视角的地缘破碎带历史演进解析——以南高加索地区为例

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地理学报 2024年第6期79卷 1592-1611页

作者：巴士奇陈瑛姚宇阳李淦叶帅陕西师范大学地理科学与旅游学院西安710119 江苏理工学院文化与旅游学院常州213001

地缘破碎带是全球冲突和大国竞争的主要区域,具备外部挤压性、内部分裂性、过程动态性等基本特征,是域内外双重尺度作用下共同形成的地理区域。地缘破碎带的基本特征与发展模式契合于地缘环境研究的核心理念,在地缘环境视角下,地缘破碎... 详细信息

地缘破碎带是全球冲突和大国竞争的主要区域,具备外部挤压性、内部分裂性、过程动态性等基本特征,是域内外双重尺度作用下共同形成的地理区域。地缘破碎带的基本特征与发展模式契合于地缘环境研究的核心理念,在地缘环境视角下,地缘破碎带是一个以域内外多元行为体互动实践为核心的不断发展演化的地理区域。通过互动实践,破碎带产生的决策信息集成为制约相关行为体发生行动的物质性与理念性因素,在此约束下,这些决策行动在时序上的排列关联构成了破碎带历史演进的核心内容。选取亚欧交界处的南高加索地区为研究区域,自1991年南高加索三国独立以来,该地区历经复杂的内部冲突与外部博弈,是地缘破碎带分析的典型案例。本文构建出地缘环境视角下地缘破碎带历史演进的分析框架,从本底要素、关联要素、结构要素3类视角解析1991年南高加索地区三国独立后至2020年底的历史演进过程及阶段性特征,并从跨领域互动、跨尺度耦合和多元行为体博弈3方面分析推动演进的内在路径,以地缘政治学理论视角多维化呈现地缘破碎带的历史演进过程,尝试将地理学研究的区域性、综合性、尺度性等基本思维模式融入历史学与国际关系学研究中。

关键词：地缘破碎带地缘环境多元行为体历史演进南高加索地区

Are all primary omental infarcts truly idiopathic?Five case reports

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World Journal of Clinical Cases 2024年第24期12卷 5596-5603页

作者： Haldun Kar Danial Khabbazazar Nihan Acar Şebnem Karasu Halis bağ Fevzi Cengiz Osman Nuri Dilek Department of General Surgery Katip Celebi University Ataturk Training and Research Hospitalİzmir 35150Türkiye Department of Radiology İzmir Katip Celebi UniversitySchool of Medicineİzmir 35150Türkiye Department of Surgery İzmir Katip Celebi UniversitySchool of Medicineİzmir 35150Türkiye

baCKGRouND Idiopathic omental infarction(IOI)is challenging to diagnose due to its low incidence and vague *** differential diagnosis also poses difficulties because it can mimic many intra-abdominal organ *** hypercoagulability and thrombosis are among the causes of omental infarction,venous thromboembolism scanning is rarely performed as an etiological *** SUMmary The medical records of the 5 cases,who had the diagnosis of IOI by computed tomography,were *** majority of the patients were male(n=4,80%)and the mean age was 31 years(range:21-38).The patients had no previous abdominal surgery or a history of any chronic *** main complaint of all patients was persistent abdominal *** infarction was detected in all patients with contrast-enhanced computed *** treatment was initially preferred in all patients,but it failed in 1 patient(20%).After discharge,all patients were referred to the hematology department for thrombophilia *** 1 patient applied for thrombophilia screening and was homozygous for methylenetetrahydrofolate reductase(A1298C mutation)and heterozygous for a factor V Leiden *** IOI should be considered in the differential diagnosis in patients presenting with progressive and/or persistent right side abdominal *** risk factors such as hypercoagulability in patients with IOI is also important in preventing future conditions related to venous thromboembolism.

关键词： Omental infarction Acute abdominal pain Thrombophilia screening Factor V Leiden Methylenetetrahydrofolate reductase Case report

Bi_(2)Te_(3)基热电材料中的声子工程

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硅酸盐学报 2024年第1期52卷 203-217页

作者：刘志愿管希成李周马妮马俊杰巴倩夏爱林晋传贵安徽工业大学材料科学与工程学院安徽马鞍山243002 安徽工业大学先进金属材料绿色制备与表面技术教育部重点实验室安徽马鞍山243002 安徽大学材料科学与工程学院合肥230601 中国科学技术大学化学与材料科学学院合肥230026

Bi_(2)Te_(3)基合金因其优异的电输运性能和较低热导率在低温区热电材料中备受关注。然而由Bi_(2)Te_(3)基合金制造的热电发电或制冷器件转化效率仍较低,因此进一步提升Bi_(2)Te_(3)基材料的热电优值zT是关键。由于晶格热导率与电性能... 详细信息

Bi_(2)Te_(3)基合金因其优异的电输运性能和较低热导率在低温区热电材料中备受关注。然而由Bi_(2)Te_(3)基合金制造的热电发电或制冷器件转化效率仍较低,因此进一步提升Bi_(2)Te_(3)基材料的热电优值zT是关键。由于晶格热导率与电性能参数关联较少,在热电性能参数中较为独立,因此,在不影响电性能的前提下,通过声子工程降低晶格热导率成为提升zT值的重要方法。本文主要综述了近年来通过纳米改性、超晶格结构、纳米复合、掺杂和引入位错阵列等声子工程优化Bi_(2)Te_(3)基材料热电性能的主要研究进展。通过这些优化手段可以显著降低材料的比热容、声子群速度或声子平均自由程,Bi_(2)Te_(3)基材料的晶格热导率显著降低,热电性能大幅提升,为热电器件的应用提供科学和技术支撑。

关键词：碲化铋基热电材料声子工程晶格热导率热电性能

“一带一路”沿线国家数字经济合作的基础、挑战与路径

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河南社会科学 2024年第1期32卷 43-51页

作者：巴殿君吕博尧吉林大学东北亚研究中心吉林长春130012

数字经济是重塑全球竞争格局的关键力量,给共建“一带一路”国家的合作提供新的机遇。中国在“一带一路”倡议下积极推动与多个共建国家的数字合作,加强了数字经济领域的协调,使共建国家数字综合实力不断提高。随着新兴科技的快速发展,... 详细信息

数字经济是重塑全球竞争格局的关键力量,给共建“一带一路”国家的合作提供新的机遇。中国在“一带一路”倡议下积极推动与多个共建国家的数字合作,加强了数字经济领域的协调,使共建国家数字综合实力不断提高。随着新兴科技的快速发展,推动产业数字化转型,共建国家对数字经济的政策支持不断完善,数字基础设施得到加强,数字环境持续改善,我国数字经济蓬勃发展,为进一步的合作奠定了坚实基础。然而,共建国家在数字经济合作方面仍存在数字经济发展不平衡、网络安全威胁、数字规则机制建设滞后等问题。为应对这些挑战,需因地制宜地推动数字经济协调发展,构建全面的数字安全保障体系,妥善处理中美关系和数字领域的竞争,多层次地构建数字治理体系,加强话语权建设并构建战略互信,加大金融支持人才培育、鼓励创新力度,实现共建“一带一路”国家数字经济的共同发展和互利共赢。

关键词： “一带一路” 数字经济 “数字丝绸之路” 国际合作

Bio-based Waterborne Poly(Vanillin-Butyl Acrylate)/MXene Coatings for Leather with Desired Warmth Retention and Antibacterial Properties

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Engineering 2024年第5期36卷 250-263页

作者： Jianzhong ma Li ma Lei Zhang Wenbo Zhang Qianqian Fan Buxing Han College of Bioresources Chemical and materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China Xi’an Key Laboratory of Green Chemicals and Functional materials Xi’an 710021China College of Chemistry and Chemical Engineering Shaanxi University of Science and TechnologyXi’an 710021China Shaanxi Collaborative Innovation Center of Industrial Auxiliary Chemistry and Technology Shaanxi University of Science and TechnologyXi’an 710021China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China

This study presents a solvent-free,facile synthesis of a bio-based green antibacterial agent and aromatic monomer methacrylated vanillin(MV)using *** resulting MV not only imparted antibacterial properties to coatings layered on leather,but could also be employed as a green alternative to petroleum-based carcinogen styrene(St).Herein,MV was copolymerized with butyl acrylate(ba)to obtain waterborne bio-based P(MV-ba)miniemulsion via miniemulsion ***,MXene nanosheets with excellent photothermal conversion performance and antibacterial properties,were introduced into the P(MV-ba)miniemulsion by ultrasonic *** the gradual solidification of P(MV-ba)/MXene nanocomposite miniemulsion on the leather surface,MXene gradually migrated to the surface of leather coatings due to the cavitation effect of ultrasonication and amphiphilicity of MXene,which prompted its full exposure to light and bacteria,exerting the maximum photothermal conversion efficiency and significant antibacterial *** particular,when the dosage of MXene nanosheets was 1.4 wt%,the surface temperature of P(MV-ba)/MXene nanocomposite miniemulsioncoated leather(PML)increased by about 15℃ in an outdoor environment during winter,and the antibacterial rate against Escherichia coli and Staphylococcus aureus was nearly 100%under the simulated sunlight treatment for 30 ***,the introduction of MXene nanosheets increased the air permeability,water vapor permeability,and thermal stability of these *** study provides a new insight into the preparation of novel,green,and waterborne bio-based nanocomposite coatings for leather,with desired warmth retention and antibacterial *** can not only realize zerocarbon heating based on sunlight in winter,reducing the use of fossil fuels and greenhouse gas emissions,but also improve ability to fight off invasion by harmful bacteria,viruses,and other microorganisms.

关键词： MXene nanosheets Vanillin Styrene substitute Leather coating Photothermal conversion Warmth retention Antibacterial properties

科学-技术关联对高技术产业创新绩效的影响研究——对外技术依存度的调节作用

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情报学报 2024年第7期43卷 839-849页

作者：马亚雪巴志超曹祯庭孙建军南京大学数据智能与交叉创新实验室南京210023 南京大学信息管理学院南京210023 南京大学数据管理创新研究中心苏州215163

高技术产业是推动创新型国家建设的支柱产业,如何提升高技术产业创新绩效是优化经济结构、提高国家产业竞争力亟须解决的关键问题。高技术产业发展离不开科技协同创新的支撑,本研究以中国高技术产业为样本,采用科学论文与专利文献代表... 详细信息

高技术产业是推动创新型国家建设的支柱产业,如何提升高技术产业创新绩效是优化经济结构、提高国家产业竞争力亟须解决的关键问题。高技术产业发展离不开科技协同创新的支撑,本研究以中国高技术产业为样本,采用科学论文与专利文献代表科学与技术,提出面向特定产业的科学论文与专利文献映射方法,从知识内容关联层面测度中国高技术产业科学-技术关联程度,利用面板模型实证分析科学-技术关联对中国高技术产业创新绩效的影响机制,探究对外技术依存度在科学-技术关联与高技术产业创新绩效关联关系间的调节作用。研究结果表明:①17个中国高技术产业的科学-技术关联程度均相对较低,不同领域高技术产业的科学-技术关联演化特征存在差异;②科学-技术关联与高技术产业创新绩效之间呈现倒U形关系;③对外技术依存度对科学-技术关联与高技术产业创新绩效的倒U形关系具有负向调节作用。本研究可以为政府部门制定科技创新发展规划和技术引进政策、中国高技术产业关联科研机构和企业选择并调整创新方向提供参考。

关键词：科学-技术关联高技术产业创新绩效对外技术依存度

颠覆性技术的后向科学引文知识特征识别研究——以基因工程领域为例

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图书情报工作 2024年第1期68卷 116-126页

作者：马亚雪王嘉杰巴志超孙建军南京大学数据智能与交叉创新实验室南京210023 南京大学信息管理学院南京210023 南京大学数据管理创新研究中心苏州215011

[目的/意义]颠覆性技术对国家的政治、经济与社会安全起到重要的支撑作用。准确识别颠覆性技术特征,对于预见技术创新发展方向、优化国家创新战略布局具有重要意义。[方法/过程]聚焦专利引证科学论文(即后向科学引文)的知识特征对颠覆... 详细信息

[目的/意义]颠覆性技术对国家的政治、经济与社会安全起到重要的支撑作用。准确识别颠覆性技术特征,对于预见技术创新发展方向、优化国家创新战略布局具有重要意义。[方法/过程]聚焦专利引证科学论文(即后向科学引文)的知识特征对颠覆性技术的预见能力,首先,从被引科学论文的知识内容特征和施被引文献的知识关联特征两个方面,量化专利后向科学引文的知识特征;然后,采用逐步回归法初步识别与专利创新程度具有显著关联的候选特征;最后,引入机器学习算法与SHapley Additive exPlanations(SHAP)模型深度解析后向科学引文知识特征与专利创新程度的关联关系,进而识别具有颠覆性技术预测能力的专利后向科学引文知识特征。[结果/结论]基因工程领域的实证分析结果显示,除被引论文的知识组合新颖性外,其余后向科学引文知识特征均与专利创新程度存在显著的非线性关联关系。在一定阈值范围内,颠覆性技术的后向科学引文可能表现出较低的知识影响力和知识元多样性、较强的知识跨学科性,并且与施引专利之间存在较长的发表时间间隔和较大的知识内容相关性。

关键词：颠覆性技术后向科学引文特征识别基因工程

Effectively modulating spatial vortex four-wave mixing in a diamond atomic system

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Chinese Physics B 2024年第4期33卷 473-478页

作者：巴诺姜明奇费金友王丹蒋海林王磊王海华 National Demonstration Center for Experimental Physics Education College of PhysicsJilin Normal UniversitySiping 136000China College of Physics Jilin UniversityChangchun 130012China

Due to the spatial characteristics of orbital angular momentum,vortex fields can be applied in the fields of quantum storage and quantum *** study the realization of spatially modulated vortex fields based on four-wave mixing in a four-level atomic system with a diamond *** intensity and spiral phase of the vortex field are effectively transferred to the generated four-wave mixing *** changing the detuning of the probe field,the phase and intensity of the generated vertex four-wave mixing field can be *** the probe field takes a large detuning value,the spatial distribution of the intensity and phase of the vertex four-wave mixing field can be effectively tuned by adjusting the Rabi frequency or detuning value of the coupled *** the same time,we also provide a detailed explanation based on the dispersion relationship,and the results agree well with our simulation results.

关键词： coherent optical effects four-wave mixing orbital angular momentum

Removal of Dyes in Aqueous Media with Hydrochar base of Solid Tanneries Waste: Optimization Process and Application

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materials Sciences and Applications 2024年第7期15卷 168-185页

作者： Abdoul Ntieche Rahman Gervais Ndongo Kounou sakué Ngankam Eric Tamafo Fouegue Aymard Didier Kouotou Daouda Abdelaziz baçaoui Department of Chemistry Higher Teacher Training College Bertoua The University of Bertoua Bertoua Cameroon Department of Fundamental Sciences Institute of Wood Technology of Mbalmayo University of Yaound I Balmayo Cameroon Department of Chemistry Faculty of Science Semlalia University of Cady Ayyad Marrakech Morocco

The Response Surface Methodology (RSM) was used to optimise the conditions of preparation of activated hydrochar from tannery solid waste by hydrothermal carbonisation (HTC). The main factors such as residence time, moisture content and final carbonisation temperature were investigated during the optimisation of hydrochar preparation conditions. The three responses investigated are hydrochar yield, iodine and methylene blue indices. The results of experimental analyses showed that the yield of hydrochar decreases with increasing final temperature, leading to the formation of micropores inside the carbonaceous solid. The optimum conditions for preparing the following hydrochar were obtained: 83.10%, 390.44 mg∙g−1 and 259.63 mg∙g−1 respectively for the hydrochar yield, the iodine and methylene blue indices. The specific surface area of prepared hydrochar is 849.160 m2/g, SEM micrographs showed a porous heterogeneous surface and particularly, the hydrochar surface also revealed external pores on the hydrochar surface which acted as a pathway to the micropores. Fourier transform infrared (FTIR), however, showed a predominance of acid functions on the surface of the carbonaceous solids. Tests were carried out to eliminate indigo carmine in aqueous media. Activated hydrochar showed a high level of activity, with the Langmuir and Freundlich isotherms giving an adsorption quantity of 354.610 mol/g and a KF constant of 468.2489, respectively. The findings of the research revealed that hydrochar produced is well adapted for dyes removal.

关键词： Response Surface Methodology Hydrochar Tannery Hydrothermal Carbonization Adsorption