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区块链技术应用对公司纵向并购的影响:促进还是抑制

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现代财经（天津财经大学学报） 2024年第4期44卷 56-73页

作者：许汝俊湖北工业大学经济与管理学院湖北武汉430068

数字化转型时代已经到来,相关新技术应用场景也越来越丰富。基于此背景,本文研究区块链技术的应用是否提升了公司纵向并购率,并从区块链技术发展和产业链发展视角提出相关建议。研究表明,区块链技术的应用能够显著推动公司进行更多的纵... 详细信息

数字化转型时代已经到来,相关新技术应用场景也越来越丰富。基于此背景,本文研究区块链技术的应用是否提升了公司纵向并购率,并从区块链技术发展和产业链发展视角提出相关建议。研究表明,区块链技术的应用能够显著推动公司进行更多的纵向并购,提升纵向并购率,这种影响是通过降低信息成本、提高风险承担水平及提升产业链资源整合效率三条路径来实现。同时,区块链技术的应用引致更大规模的纵向并购能够显著提高相关公司价值。进一步研究发现,较低的供应链集中度会强化区块链技术对纵向并购率的影响,公司所处生命周期的差异会显著影响区块链技术的应用与纵向并购率之间的关系。本文丰富了区块链在资本市场行为领域的应用研究范畴,也为产业数字化转型下公司高效进行纵向并购提供了理论依据及实践参考。

关键词：数字化转型区块链产业链纵向并购

Polishing of Titanium Alloy Blade Root with Elastic Magnetic Toolic Tool

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稀有金属材料与工程 2024年第9期53卷 2413-2419页

作者： xu Chengyu Ji Dongfeng Zhang Yun Zhu Yongwei College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 211106China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China

Removal of milling marks at the root fillet of titanium alloy blade is a tough work because of the interference between the polishing tool and the workpiece.A polishing method based on elastic magnetic tool was *** software ANSYS Maxwell was used to simulate the effect of different pole orientation arrangements on the magnetic field distribution.A comparison of polishing effect was made between elastic and inelastic magnetic pole *** processing parameters of the elastic magnetic tool polishing for the blade root were optimized by orthogonal experiment(Taguchi)*** show that compared with the inelastic magnetic polishing tool,the elastic magnetic polishing tool with polyurethane as the pole carrier can effectively improve the surface quality of the polished *** the optimal processing parameters(rotational speed=900 r/min,feeding rate=6 mm/min,machining gap=1.5 mm and abrasive size=10‒14μm),the original milling marks at the blade root are effectively removed and the average surface roughness Ra is dropped from 0.95μm to 0.12μm,which verifies the feasibility of the elastic magnetic polishing tool in the surface finishing of the titanium alloy blade root.

关键词： titanium alloy blade root fillet elastic magnetic polishing tool processing parameters surface roughness

Improving innovation and entrepreneurship education in higher institutions: the impact of "Mass Entrepreneurship and Innovation" education on undergraduates' entrepreneurial intentions

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教育技术与创新 2024年第1期6卷 10-26页

作者： ShaoYing Lu Sun Ye XiaoShu xu Yuwei Zhao Graduate School Stamford International UniversityThailand Centre for Portuguese Studies Macao Polytechnic UniversityMacao 不详

The exploration of the way"mass entrepreneurship and innovation"(MEI)education influences students'aspirations to become entrepreneurs has grown into an important area of analysis in studies related to higher *** research intends to examine the consequences of MEI education on students'tendency towards entrepreneurship,and to put forward methods for augmenting the teaching of innovation and entrepreneurship in private higher educational *** achieve this objective,questionnaires and semi-structured interviews were employed in the study,which involved a total of 197 students and five education *** statistical analysis of the questionnaire data revealed that MEI education was positively related to students'entrepreneurial intentions,and that both entrepreneurial experience and family entrepreneurial background played moderating roles in this *** interview findings indicated that private universities could enhance educational reforms by designing talent training programs,developing diversified curricula,and developing more professional entrepreneurial platforms to encourage students'entrepreneurial *** study offers fresh insights for improving and perfecting the mechanism of innovation and entrepreneurship education in private universities.

关键词： Private universities Mass Entrepreneurship and Innovation MEI education entrepreneurial intention

Entrepreneurial Spirit for China in the New Era and Strategies for Cultivation

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China Economist 2024年第5期19卷 48-59页

作者： xu Yuanhua He Jun Sun Zao Li Xiaoke School of Economics Lanzhou UniversityLanzhouChina Institute of Industrial Economics Chinese Academy of Social Sciences(IIE-CASS)BeijingChina School of Economics and Finance Xi’an Jiaotong UniversityXi’anChina School of Economics Zhongnan University of Economics and LawWuhanChina

What type of entrepreneurial spirit is needed for China’s new era,and how can we unlock its innovation potential?Answers to these questions will unleash vital forces to drive China’s high-quality economic *** reviewing the theories,dimensions,features,and limitations of the entrepreneurial spirit in the Western context,we concluded that the entrepreneurial spirit in China’s new era,which is characterized by patriotism,innovation,trustworthiness,adherence to the law,fulfillment of social responsibilities,and a global horizon,has overcome the limitations that come with self-interested entrepreneurship in the context of Western *** is a major step forward in the development of theories on entrepreneurial *** the development context of the new era,this paper argues that the entrepreneurial spirit should become an important force at the individual level to implement the new development concept,foster the new development paradigm,and promote high-quality development in the new *** paper provides answers to the question of what type of entrepreneurial spirit China’s new era ***,this paper presents basic strategies for cultivating entrepreneurial spirit in the context of China’s new era,emphasizing the importance to promote the healthy growth of young entrepreneurs,ensure their business autonomy,develop a multi-tiered capital market,implement the factor market reforms,improve the business climate,and accelerate the digital transition.

关键词： Context of China’s new era context of Western economics entrepreneurial spirit high-quality development cultivation strategy

Entire Sign-Changing Solutions to the Fractional Critical Schr?dinger Equation

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Annals of Applied Mathematics 2024年第3期 219-248页

作者： Xingdong Tang Guixiang xu Chunyan Zhang Jihui Zhang School of Mathematics and Statistics Nanjing University of Information Science and Technology Laboratory of Mathematics and Complex Systems (Ministry of Education) School of Mathematical Sciences Beijing Normal University School of Mathematical Sciences Nanjing Normal University

In this paper,we consider the fractional critical Schr?dinger equation(FCSE)■ where■,N≥4,0

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安徽南部地区奥陶纪海相红层的分布及时代

地质科学 2024年第1期59卷 210-223页

作者：徐锦龙安徽省地质调查院合肥230001 古生物与地质环境演化湖北省重点实验室武汉430205

在充分收集前人奥陶系地层学、古生物学和沉积学等资料的基础上,对安徽南部地区奥陶系进行了系统梳理,开展皖东地1井和贵池冯村剖面奥陶纪海相红层系统研究,为地层对比、古气候和古地理恢复提供重要的科学依据。研究表明:奥陶纪海相红... 详细信息

在充分收集前人奥陶系地层学、古生物学和沉积学等资料的基础上,对安徽南部地区奥陶系进行了系统梳理,开展皖东地1井和贵池冯村剖面奥陶纪海相红层系统研究,为地层对比、古气候和古地理恢复提供重要的科学依据。研究表明:奥陶纪海相红层主要分布于紫台组、牯牛潭组、大田坝组、宝塔组、汤头组和胡乐组,时代为早奥陶世弗洛晚期至晚奥陶世凯迪中期;主要岩石类型为碳酸盐岩(瘤状泥质灰岩、网纹状灰岩、含生物碎屑灰岩和泥微晶灰岩等),少量碎屑岩(泥岩、含粉砂质泥岩、含粉砂质页岩);大多数属半深水海相红层,局部为浅水和深水海相红层;自北西向南东呈现一层式→二层式→三层式→二层式→一层式→零层式的横向变化,出现时代凯迪期→达瑞威尔期→弗洛期的纵向变化,海相红层的分布与沉积环境、古水温和不同地区构造性质密切相关;研究区海相红层不仅具有区域性(与湖北宜昌奥陶系具有对比性),而且具有全球性(中国主要块体),在地层划分与对比上具有重要的研究价值。

关键词：奥陶纪海相红层分布对比安徽南部地区

On a Hybrid Method for Inverse Transmission Eigenvalue Problems

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Annals of Applied Mathematics 2024年第2期40卷 139-160页

作者： Weishi Yin Zhaobin xu Pinchao Meng Hongyu Liu School of Mathematics and Statistics Changchun University of Science and TechnologyChangchunJilin 130022China Department of Mathematics City University of Hong KongKowloonHong KongChina

In this paper, we are concerned with the inverse transmission eigenvalue problem to recover the shape as well as the constant refractive index of a penetrable medium scatterer. The linear sampling method is employed to determine the transmission eigenvalues within a certain wavenumber interval based on far-field measurements. Based on a prior information given by the linear sampling method, the neural network approach is proposed for the reconstruction of the unknown scatterer. We divide the wavenumber intervals into several subintervals, ensuring that each transmission eigenvalue is located in its corresponding subinterval. In each such subinterval, the wavenumber that yields the maximum value of the indicator functional will be included in the input set during the generation of the training data. This technique for data generation effectively ensures the consistent dimensions of model input. The refractive index and shape are taken as the output of the network. Due to the fact that transmission eigenvalues considered in our method are relatively small,certain super-resolution effects can also be generated. Numerical experiments are presented to verify the effectiveness and promising features of the proposed method in two and three dimensions.

关键词： Inverse transmission eigenvalue problem linear sampling method neural network super-resolution

Construction of an Evaluation Index System for Innovation and Entrepreneurship Education in Vocational Colleges from Students’Perspective

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Journal of Contemporary Educational Research 2024年第9期8卷 10-16页

作者： Aihong Wang Yueming Zhan Wendie Wang Liqun xu Chongqing Energy College Chongqing 402247China

Innovation and entrepreneurship education is an essential content in the current teaching of colleges and universities and an important driving force to promote students’***,colleges and universities continue to strengthen the innovation of innovation and entrepreneurship teaching,and the construction of the evaluation system of innovation and entrepreneurship education is *** evaluation system is an important evaluation standard for innovation and entrepreneurship teaching and the basis for educational innovation,which is also a critical part of teaching that requires *** paper takes the construction of the evaluation index system of innovation and entrepreneurship education in vocational colleges as the research goal and understands the function of innovation and entrepreneurship evaluation as well as the evaluation principle through the literature analysis *** also analyzes the evaluation index system of innovation and entrepreneurship teaching from students’perspective to provide an effective reference for the implementation of innovation and entrepreneurship education in higher vocational colleges.

关键词： Student perspective Vocational college Innovation and entrepreneurship education Evaluation index system

Enhanced degradation of florfenicol by microscale SiC/Fe:Dechlorination via hydrogenolysis

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Chinese Chemical Letters 2024年第7期35卷 218-221页

作者： Yun-Fei Zhang Chun-Hui Zhang Jian-Hui xu Lei Li Dan Li Jin-Hong Fan Jiale Gao Xin Quan Qi Wu Yue Zou Yan-Ling Liu Dongguan University of Technology School of Environment and Civil EngineeringDongguan 523830China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Herein,the degradation of florfenicol(FLO)over zero-valent iron(ZVI)enhanced by SiC was systematically *** was found that 5 g/L of ZVI/SiC(1:3)at pH 3.0 could completely degrade 20 mg/L of FLO within 1 h,with a Kobsvalue of 0.0873 min^(-1),12.5 times greater than that of pure ZVI(0.0069 min^(-1)).Vibrating sample magnetometer(VSM)characterizations revealed that the use of SiC supporter reduces the magnetic intensity of ZVI,which mitigates iron particle agglomeration,increases Brunauer-Emmett-Teller(BET)surface area,and enhances FLO degradation ***,ZVI/SiC exhibits a much lower hydrogen evolution potential(HEP)and significantly higher corrosion currents compared to pure *** was proposed to undergo degradation via reductive dechlorination,involving a hydrogenolysis mechanism that entails the cleavage of theσ*** study provides new insights into the reduction hydrogenation mechanism of ZVI.

关键词： Zero-valent iron Silicon carbide Reductive dechlorination Hydrogenolysis Florfenicol