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计算机断层扫描在工业遗产文物保护中的应用研究

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热加工工艺 2024年第17期53卷 78-83页

作者：巴玥温瑀燕山大学河北秦皇岛066004

针对工业遗产的钢材结构表面及内部的孔隙、裂缝等微观缺陷,采用计算机断层扫描系统进行三维可视化,检测出缺陷位置,随后采用激光再制造技术以Fe-Cr-Mo+8wt%Al2O3复合粉末对缺陷位置进行精确修复。结果表明:经激光再制造后试样表面裂纹... 详细信息

针对工业遗产的钢材结构表面及内部的孔隙、裂缝等微观缺陷,采用计算机断层扫描系统进行三维可视化,检测出缺陷位置,随后采用激光再制造技术以Fe-Cr-Mo+8wt%Al2O3复合粉末对缺陷位置进行精确修复。结果表明:经激光再制造后试样表面裂纹和气孔显著减少,修复层主要由固溶体FeCr相、碳化物M(Fe,Cr,Mo)7C3、金属间化合物Fe3Al和陶瓷相Al2O3组成,显著提高了原始表面的耐腐蚀性。

关键词：工业遗产激光再制造计算机断层扫描

“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

From Fostering to delusional Disorder of Filiation

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Open Journal of Psychiatry 2024年第4期14卷 283-286页

作者： Momar Camara Wissem Masmoudi El Hadji Makhtar ba Sokhna Seck Maïmouna Dieye Aïda Sylla department of Psychiatry and Medical Psychology Cheikh Anta Diop University Dakar Senegal thiaroye National Psychiatric Hospital Center Dakar Senegal Fann National University Hospital Center Dakar Senegal Albert Royer Childrens Hospital Dakar Senegal

Introduction: Fostering is a widespread practice in West Africa. It played an essential role in the circulation of children. the failure of its community regulation, not compensated by a legal framework, has made its practice precarious. Observation: A case study was conducted on Dior, who was hospitalised in a psychiatric ward for a delusional disorder of filiation. Dior was entrusted to her maternal grandmother and aunt at ages 2 and 9. During these fosterings, the place of the symbolic father was not substituted, causing a void that challenged her imagination. the outcome was an inscription in a genealogy where she had found herself with prestigious parents. Discussion: Fostering has strongly disrupted the family dynamics in Dior’s case. One of her options was to assume the paternal function, the use of which was perceived as a defiance or even a transgression. this same function would be a starting point of a psychosis whose filial character would only be an attempt at rectification where reality and imagination collide. Conclusion: Our study reveals the importance of stable parental figures at stake in fostering contexts, which constitute a risk factor for the development of a subsequent psychosis.

关键词： delusional Disorder of Filiation Psychopathology Interactions Fostering Family

Correlation of work function and stacking fault energy through Kelvin probe force microscopy and nanohardness in diluteα-magnesium

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Journal of Magnesium and Alloys 2024年第1期12卷 237-250页

作者： Yigit türe Ali Arslan Kaya Hüseyin Aydin Jiang Peng Servet turan Eskisehir technical University Porsuk Vocational SchoolElectronics and Automation DepartmentProgram of MechatronicsEskisehirTurkey Mugla Sitki Kocman University Engineering FacultyMetallurgy and Materials Engineering DepartmentMuglaTurkey Hüseying Aydın TUBITAK MRCTurkey Jiang Peng Chongqing UniversityChina Eskisehir technical University Engineering FacultyMaterials Science and Engineering DepartmentEskisehirTurkey

Electronic interactions of the Group 2A elements with magnesium have been studied through the dilute solid solutions in binary Mg-Ca,Mg-Sr and Mg-ba *** investigation incorporated the difference in the‘Work Function'(ΔWF)measured via Kelvin Probe Force Microscopy(KPFM),as a property directly affected by interatomic bond types,*** electronic structure,nanoindentation measurements,and Stacking Fault Energy values reported in the *** was shown that the nano-hardness of the solid-solutionα-Mg phase changed in the order of Mg-Ca>Mg-Sr>***,it was shown,by also considering the nano-hardness levels,that SFE of a solid-solution is closely correlated with its‘Work Function'***-hardness measurements on the eutectics andΔWF difference between eutectic phases enabled an assessment of the relative bond strength and the pertinent electronic structures of the eutectics in the three *** withΔWF and at least qualitative verification of those computed SFE values with some experimental measurement techniques were considered important as those computational methods are based on zero Kelvin degree,relatively simple atomic models and a number of *** asserted by this investigation,if the results of measurement techniques can be qualitatively correlated with those of the computational methods,it can be possible to evaluate the electronic structures in alloys,starting from binary systems,going to ternary and then multi-elemental *** investigation has shown that such a qualitative correlation is *** all,the SFE values are not treated as absolute values but rather become essential in comparative investigations when assessing the influences of alloying elements at a fundamental level,that is,free electron density *** study indicated that the principles of‘electronic metallurgy'in developing multi-elemental alloy systems can be followed via practical experimental methods,i.e.ΔWF measurements using KPF

关键词： Mg alloys Dilute alloys Work function Stacking fault energy Kelvin probe force microscopy Short range order Miedema Nanoindentation Eutectics

Permeability Estimation of Shale Oil Reservoir with Laboratory-derived Data: A Case Study of the Chang 7 Member in Ordos basin

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Applied Geophysics 2024年第3期21卷 440-455,616页

作者： Zhang Lin Gao Li ba Jing Zhang Meng-Bo JoséM.Carcione Liu Wei-Hua School of Earth Sciences and Engineering Hohai UniversityNanjingJiangsu211000 Exploration and development Research Institute of PetroChina Changqing Oilfield CompanyXi'an Shanxi710018 National Institute of Oceanography and Applied Geophysics(OGS) SgonicoTrieste 34010 Sinopec Geophysical Research Institute NanjingJiangsu211103

the shale oil reservoir within the Yanchang Formations of Ordos basin harbors substantial oil and gas resources and has recently emerged as the primary focus of unconventional oil and gas exploration and *** to its complex pore and throat structure,pronounced heterogeneity,and tight reservoir characteristics,the techniques for conventional oil and gas exploration and production face challenges in comprehensive implementation,also indicating that as a vital parameter for evaluating the physical properties of a reservoir,permeability cannot be effectively *** study selects 21 tight sandstone samples from the Q area within the shale oil formations of Ordos *** systematically conduct the experiments to measure porosity,permeability,ultrasonic wave velocities,and resistivity at varying confining *** reveal that these measurements exhibit nonlinear changes in response to effective *** using these experimental data and effective medium model,empirical relationships between P-and S-wave velocities,permeability and resistivity and effective pressure are established at logging and seismic ***,relationships between P-wave impedance and permeability,and resistivity and permeability are determined.A comparison between the predicted permeability and logging data demonstrates that the impedance–permeability relationship yields better results in contrast to those of resistivity–permeability *** relationships are further applied to the seismic interpretation of shale oil reservoir in the target layer,enabling the permeability profile predictions based on inverse P-wave *** predicted results are evaluated with actual production data,revealing a better agreement between predicted results and logging data and productivity.

关键词： shale oil reservoir P-wave impedance resistivity permeability rock physics experiment

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

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

考虑台地效应的泸定6.8级地震某框架结构震害调查与分析

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土木工程学报 2024年第6期57卷 136-151页

作者：潘毅任靖哲任宇赵靖轩巴振宁西南交通大学土木工程学院四川成都610031 西南交通大学抗震工程技术四川省重点实验室四川成都610031 中信建筑设计研究总院有限公司湖北武汉430014 天津大学天津300350

2022年9月5日四川省泸定县发生6.8级地震,在磨西台地上某框架结构的震害调查中,发现其东区和西区的框架结构出现不同程度的震害,且差异明显。其中,东、西区框架的首层柱上端均发生了“强梁弱柱”型破坏,西区框架中等及以上破坏等级的比... 详细信息

2022年9月5日四川省泸定县发生6.8级地震,在磨西台地上某框架结构的震害调查中,发现其东区和西区的框架结构出现不同程度的震害,且差异明显。其中,东、西区框架的首层柱上端均发生了“强梁弱柱”型破坏,西区框架中等及以上破坏等级的比例达到81%,而东区框架仅为13%,呈现出与台地边缘的强关联性。为分析东、西区框架结构震害差异的原因,采用FK-SEM方法分析了磨西台地的地震放大效应。计算结果表明,距离台地边缘越近,地震放大系数越大。其中,水平和竖向的地震放大系数在西区建筑场地分别为2.30和2.25,而在东区建筑场地则分别为2.01和1.99。在此基础上,采用磨西台站的地震动记录,对东、西区框架结构进行了震害模拟,分析了其破坏原因。研究结果表明:磨西台地边缘的地震影响系数的实际放大系数超过了《抗规》规定,存在不利地段影响和近场地震效应叠加的情况,仅按《抗规》不利地段进行考虑,多层框架结构难以实现“大震不倒”的设防目标;竖向地震作用是框架柱下端破坏的直接原因,主要破坏形态为偏拉、偏压破坏,水平地震作用导致其二次破坏;“仿雀替”构造对结构整体变形能力不利,是框架结构“强梁弱柱”型破坏的主要原因。根据震害调查和分析结果,建议在9度近断层设防地区,靠近台地边缘的多层框架结构,设计前宜对建筑场地进行分析,并考虑竖向地震的影响;在有民族特色的建筑设计中,应将“仿雀替”等装饰物与框架脱离,设计为非结构构件,以减少其对框架结构抗震性能的不利影响。

关键词：泸定地震震害调查台地效应震害模拟框架结构竖向地震

房地产企业粉饰负债测度及其对公司经营的影响

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金融发展研究 2024年第4期 32-43页

作者：巴曙松黄沁张兢北京大学汇丰金融研究院广东深圳518055 重庆大学经济与工商管理学院重庆401120 西南政法大学商学院重庆401120

在“房住不炒”“三道红线”等调控政策背景之下,房地产企业可能产生“粉饰负债”等机会主义行为,严重损害企业财务信息披露质量,进而干扰市场决策并削弱政策效果。因此,本文以2011—2022年中国沪深A股房地产上市企业为样本,测度房地产... 详细信息

在“房住不炒”“三道红线”等调控政策背景之下,房地产企业可能产生“粉饰负债”等机会主义行为,严重损害企业财务信息披露质量,进而干扰市场决策并削弱政策效果。因此,本文以2011—2022年中国沪深A股房地产上市企业为样本,测度房地产企业粉饰负债规模,并实证检验房地产企业粉饰负债对公司经营的影响。研究发现:中国房地产企业存在粉饰负债的机会主义行为;房地产企业粉饰负债,可以在短期内避免债务违约,在长期却使得投资效率降低和现金流约束加强,其本质是用短期利益去置换长期利益;国有产权能够发挥治理作用,在一定程度上缓解以上负向影响,而董事长性别与学历在短期内会有较弱的促进作用。

关键词：粉饰负债房地产企业过度负债金融监管

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