检索结果-南通市图书馆

文物保护与博物馆展示利用研究——基于刘家庄遗址出土青铜器保护修复成果的思考

在线全文

学校读者我要写书评

暂无评论

中国博物馆 2021年第1期 23-27,127页

作者：王传昌李铭蔡友振山东省文物保护修复中心济南250014 济南市考古研究所济南250014

文物保护既要治理文物病害,最大程度延长文物寿命,还应尽可能多的提取文物信息,让其能够"活"起来。保护成果可通过博物馆等场所进行展陈宣传,以彰显其历史、艺术及科学价值,树立和坚定"文化自信"。"济南刘家庄遗址出土青铜器保护修复项... 详细信息

文物保护既要治理文物病害,最大程度延长文物寿命,还应尽可能多的提取文物信息,让其能够"活"起来。保护成果可通过博物馆等场所进行展陈宣传,以彰显其历史、艺术及科学价值,树立和坚定"文化自信"。"济南刘家庄遗址出土青铜器保护修复项目"正是基于此种思考,开展青铜器科学分析、数字化技术应用以及最大程度保留原始信息,为后期科学展示与利用积累资料。通过文物保护讲好文物及其背后的故事,丰富山东地区商代文化内涵,并为此类文物保护提供有益借鉴。

关键词：博物馆藏品保护展示利用青铜器修复济南刘家庄遗址

在线全文

学校读者我要写书评

暂无评论

透闪石玉物相构成及沁蚀演化机理新解

文物保护与考古科学 2020年第6期32卷 1-12页

作者：王云鹏刘芳志王传昌马清林山东省文物保护修复中心山东济南250014 山东大学环境与社会考古学国际合作联合实验室山东青岛266237

中国是世界上玉文化源远流长的地区,随着玉文化研究的深入和玉学的兴起,玉石的物相构成及受沁演化机理成为学界和出土古玉鉴定中的重要问题。由于埋藏环境的作用,许多玉器出土时的面貌和成分结构已发生很大改变。本研究运用扫描电子显... 详细信息

中国是世界上玉文化源远流长的地区,随着玉文化研究的深入和玉学的兴起,玉石的物相构成及受沁演化机理成为学界和出土古玉鉴定中的重要问题。由于埋藏环境的作用,许多玉器出土时的面貌和成分结构已发生很大改变。本研究运用扫描电子显微镜及能谱仪(SEM-EDX)、显微激光拉曼光谱仪(MLRM)和傅里叶变换红外光谱仪(FTIR)等分析设备,对湖北省京山市苏家垄遗址春秋时期M88号墓棺内出土的4件玉器残片以及1件现代透闪石玉原石开展比较研究。研究确认透闪石玉中除了纤维状的矿物成分,还包含玻璃相的高级脂肪酸盐,分布于晶界及晶体间隙的玻璃相脂肪酸盐在玉石晶链间形成缓冲,使透闪石玉具有较高的韧性,不易崩碎。当腐蚀发生时,脂肪酸盐会变质分解溶出,部分会在玉石裂隙及疏松处富集并吸附其他物质,致使玉石受沁。脂肪酸盐大量流失后,透闪石玉晶链因失去缓冲而极易碎裂。此时,链状结构中Ca-O键和Fe-O键因强度低于Mg-O键而优先断裂流失,使得玉石内阳起石结构减少,外观由半透明向不透明转变,甚至白化。关于古代玉石中脂肪酸盐来源及其对玉石影响的研究,为古玉研究开拓了新的途径。

关键词：玉器受沁苏家垄遗址芈克墓玻璃相脂肪酸盐 SEM-EDX LRS FTIR

水泥混凝土路面加铺沥青路面的早期病害成因及对策研究

在线全文

学校读者我要写书评

暂无评论

中国高新科技 2021年第10期 99-100页

作者：王传昌北京佳和建设工程有限公司北京101300

公路作为我国重要的基础设施建设之一,承担着交通运输、居民出行等重要任务。但随着时间的推移,公路的早期病害逐渐显现,其中水泥混凝土路面加铺沥青路面兼具了水泥混凝土和沥青路面的病害特点,这些病害为公路的正常使用留下了潜在威胁... 详细信息

公路作为我国重要的基础设施建设之一,承担着交通运输、居民出行等重要任务。但随着时间的推移,公路的早期病害逐渐显现,其中水泥混凝土路面加铺沥青路面兼具了水泥混凝土和沥青路面的病害特点,这些病害为公路的正常使用留下了潜在威胁。文章分析了水泥混凝土路面加铺沥青路面的早期常见病害及其成因,并针对这些病害提出相应的对策,为我国公路建设、维护提供参考。

关键词：水泥混凝土沥青路面早期病害成因及对策

山东省可移动文物保护现状调查及保护对策研究

在线全文

学校读者我要写书评

暂无评论

人类文化遗产保护 2018年第1期9卷 1-5页

作者：王传昌山东省文物保护修复中心

对山东省可移动文物保存现状调查活动进行全面调查和总结,分析全省可移动文物受损情况、保护环境、保护修复力量和保护项目实施等问题。在此基础上,对提高保护修复能力的相关对策进行研究与思考,针对山东实施文化遗产保护提供工作思路... 详细信息

对山东省可移动文物保存现状调查活动进行全面调查和总结,分析全省可移动文物受损情况、保护环境、保护修复力量和保护项目实施等问题。在此基础上,对提高保护修复能力的相关对策进行研究与思考,针对山东实施文化遗产保护提供工作思路和相关保护对策。推动山东省可移动文物保护修复工作持续性发展。

关键词：山东省可移动文物保护修复

The reformation of catalyst:From a trial-and-error synthesis to rational design

在线全文

学校读者我要写书评

暂无评论

Nano Research 2024年第4期17卷 3261-3301页

作者： Ligang wang Jiabin Wu Shunwu wang Huan Liu Yao wang Dingsheng wang Department of Chemistry Tsinghua UniversityBeijing 100084China

The appropriate catalysts can accelerate the reaction rate and effectively boost the efficient conversion of various molecules,which is of great importance in the study of chemistry,chemical industry,energy,materials and environmental ***,efficient,environmentally friendly,and easy to operate synthesis methods have been used to prepare various types of *** previous studies have reported the synthesis and characterization of the aforementioned catalysts,more still remain in trial and error methods,without in-depth consideration and improvement of traditional synthesis ***,we comprehensively summarize and compare the preparation methods of the trial-and-error synthesis strategy,structure–activity relationships and density functional theory(DFT)guided catalysts rational design for nanomaterials and atomically dispersed *** also discuss in detail the utilization of the nanomaterials and single atom catalysts for converting small molecules(H_(2)O,O_(2),CO_(2),N_(2),etc.)into value-added products driven by electrocatalysis,photocatalysis,and ***,the challenges and outlooks of mass preparation and production of efficient and green catalysts through conventional trial and error synthesis and DFT theory are featured in accordance with its current development.

关键词： trial-and-error synthesis structure–activity relationships density functional theory(DFT)guidance nanomaterials atomically dispersed catalysts

Numerical Analysis of PRISM-PY Calculations for Hard-and Soft-Core Generic Polymer Models

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第4期42卷 532-543页

作者： Qiang wang Department of Chemical and Biological Engineering Colorado State University1370 Campus DeliveryFort CollinsCO80523-1370USA

Generic polymer models capturing the chain connectivity and excluded-volume interactions between polymer segments can be classified, according to whether or not the 3D integral of the latter diverges, into hard- and soft-core models. Taking homogeneous systems of compressible homopolymer melts (or equivalently homopolymer solutions in an implicit, good solvent) in the continuum as an example, we recently compared the correlation effects on the structural and thermodynamic properties of the hard- and soft-core models given by the polymer reference interaction site model (PRISM) theory with the Percus-Yevick (PY) closure (Polymers 2023, 15, 1180). Here we analyzed in detail the numerical errors and behavior of the interchain pair correlation functions (PCFs) given by the PRISM-PY calculations of these models using an efficient numerical approach that we proposed. Our numerical approach has the least number of independent variables to be iteratively solved, analytically treats the discontinuities caused by the non-bonded pair potential (such as that of the hard spheres) and takes only the inverse Fourier transform of the interchain indirect PCF between polymer segments (which is continuous and decays towards 0 with increasing wavenumber much faster than both the interchain direct and total PCFs), and is essential for us to accurately solve the PRISM-PY theory for chain length N as large as 106. To capture the correlation-hole effect, the real-space cut-off in the PRISM calculations should be proportional to the square root of N.

关键词： Generic polymer models Soft potentials Polymer reference interaction site model theory

Linear-Quadratic Pareto Cooperative Game for Mean-Field Backward Stochastic System

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2024年第3期37卷 947-964页

作者： wang Yu School of Control Science and Engineering Shandong UniversityJinan 250061China

This paper focuses on a Pareto cooperative differential game with a linear mean-field backward stochastic system and a quadratic form cost functional. Based on a weighted sum optimality method, the Pareto game is equivalently converted to an optimal control problem. In the first place,the feedback form of Pareto optimal strategy is derived by virtue of decoupling technology, which is represented by four Riccati equations, a mean-field forward stochastic differential equation(MF-FSDE),and a mean-field backward stochastic differential equation(MF-BSDE). In addition, the corresponding Pareto optimal solution is further obtained. Finally, the author solves a problem in mathematical finance to illustrate the application of the theoretical results.

关键词： Backward stochastic differential equation linear-quadratic control mean-field Pareto optimality

A multi-source information fusion layer counting method for penetration fuze based on TCN-LSTM

在线全文

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2024年第3期33卷 463-474页

作者： Yili wang Changsheng Li Xiaofeng wang Nanjing University of Science and Technology Nanjing 210094JiangsuChina State Key Laboratory of Explosion Science and Technology Beijing Institute of TechnologyBeijing 100081China

When employing penetration ammunition to strike multi-story buildings,the detection methods using acceleration sensors suffer from signal aliasing,while magnetic detection methods are susceptible to interference from ferromagnetic materials,thereby posing challenges in accurately determining the number of *** address this issue,this research proposes a layer counting method for penetration fuze that incorporates multi-source information fusion,utilizing both the temporal convolutional network(TCN)and the long short-term memory(LSTM)recurrent *** leveraging the strengths of these two network structures,the method extracts temporal and high-dimensional features from the multi-source physical field during the penetration process,establishing a relationship between the multi-source physical field and the distance between the fuze and the target plate.A simulation model is developed to simulate the overload and magnetic field of a projectile penetrating multiple layers of target plates,capturing the multi-source physical field signals and their patterns during the penetration *** analysis reveals that the proposed multi-source fusion layer counting method reduces errors by 60% and 50% compared to single overload layer counting and single magnetic anomaly signal layer counting,*** model's predictive performance is evaluated under various operating conditions,including different ratios of added noise to random sample positions,penetration speeds,and spacing between target *** maximum errors in fuze penetration time predicted by the three modes are 0.08 ms,0.12 ms,and 0.16 ms,respectively,confirming the robustness of the proposed ***,the model's predictions indicate that the fitting degree for large interlayer spacings is superior to that for small interlayer spacings due to the influence of stress waves.

关键词： Penetration fuze Temporal convolutional network(TCN) Long short-term memory(LSTM) Layer counting Multi-source fusion

Assessment of tree-ring mercury radial translocation and age effect in Masson pine:Implications for historical atmospheric mercury reconstruction

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2024年第4期138卷 266-276页

作者： Xu Liu Xun wang Dingyong wang College of Resources and Environment Southwest UniversityChongqing 400715China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

The tree ring has been regarded as an emerging archive to reconstruct historical atmospheric mercury(Hg)trends,but with the large knowledge gaps in the *** this study,we comprehensively evaluated the Hg source,radial translocation and age effect of Masson pine(Pinus massoniana)tree ring at *** in Chongqing,to assess the suitability of such tree ring as the archive of atmospheric *** showed that distinct variabilities among Masson pine tree-ring Hg concentration *** Hg concentration significantly increased along with stem height(P<0.05),indicating the Hg in tree rings mainly derived from foliage uptake atmospheric *** found a distinct age effect that the tree ring of young trees had the higher Hg ***,we used the advection-diffusion model to demonstrate how Hg concentration shifted by the advection or/and diffusion in tree *** modeling results showed that the advection induced radial translocation during the young growth period of tree was a plausible mechanism to result in the tree-ring Hg record largely different from the trend of anthropogenic Hg emissions in *** finally suggest that in further Hg dendrochemistry,better discarding the tree-ring Hg profile of the young growth period to reduce impacts of the radial translocation and age effect.

关键词： Masson pine Tree-ring mercury Radial translocation Tree age effect