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贸易数字化与企业出口新空间——基于“多重平台”大数据的经验研究

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国际商务(对外经济贸易大学学报) 2025年第1期 36-54页

作者：余号殷凤上海社会科学院中国国际经济交流中心上海分中心上海200025 上海大学经济学院上海200444

推动贸易主体数字化转型与优化国际市场布局是中国对外贸易高质量发展的重点任务,探究二者之间的关系具有重要的现实意义。本文通过识别企业是否应用“多重平台”,探究贸易数字化对企业开拓出口新空间的影响及其机制。研究发现:贸易数... 详细信息

推动贸易主体数字化转型与优化国际市场布局是中国对外贸易高质量发展的重点任务,探究二者之间的关系具有重要的现实意义。本文通过识别企业是否应用“多重平台”,探究贸易数字化对企业开拓出口新空间的影响及其机制。研究发现:贸易数字化有利于企业进入新出口市场,拓宽出口市场的广度,以及挖掘出口市场的深度;贸易数字化企业能够克服与出口信息相关的固定贸易成本,并通过向新市场、更小规模市场出口以及培育创新能力拓宽出口市场的广度,也能够克服与出口距离相关的可变贸易成本,并通过提高交易效率、产品质量以及退出竞争力弱的旧市场挖掘出口市场的深度;全面、动态地考察企业使用数字技术的情况是解开“目的地集约边际增长之谜”的关键。

关键词：贸易数字化创新能力产品质量出口市场数字贸易

Experimental investigations on combined high and low cycle fatigue:Material-level specimen design and strain response characteristics

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Chinese Journal of Aeronautics 2025年第1期38卷 380-394页

作者： Xin DING Dawei HUANG Zixu GUO Han YAN Xiaojun YAN yinzhuoran WANG feng yin Xu LUAN Research and Development Center Gas Turbine Corporation Ltd.of Aero Engine Corporation of ChinaShenyang 110015China School of Energy and Power Engineering Beihang UniversityBeijing 100191China Department of Mechanical Engineering National University of SingaporeSingapore 117575Singapore School of Metallurgy Northeastern UniversityShenyang 110167China

The paper designs a novel material-level specimen and its dedicated fixture suitable for applying Combined high-and low-Cycle Fatigue(CCF)*** full-scale or simulation specimens,the CCF specimen eliminates geometrically induced stress gradients in the test *** data on CCF life and strain responses of ZSGH4169 alloy are acquired under different CCF *** Maximum Strain within Each(MSE)CCF cycle is demonstrated to be independent of the Low-Cycle Fatigue(LCF)loads and High-Cycle Fatigue(HCF)stress amplitudes,but exhibits a correlation with the Cycle Ratio of HCF/LCF(Rf).The growth law of MSE changes from linear to logarithmic as *** amplitudes in the dwell stage,observed unaffected by Rf,are quantified as a function of LCF nominal stresses and HCF stress ***,under a defined CCF load,strain amplitudes in the dwell stage remain *** peaks in the dwell stage in a single CCF cycle decrease in a power function with increasing HCF cycles.

关键词： Material-level specimen Low-cycle fatigue High-cycle fatigue Combined high-and low-cycle fatigue Fatigue life Strain response

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指向课程协同育人的跨学科主题学习路径设计

教学与管理 2025年第2期 24-28页

作者：殷凤张慧上海市浦东教育发展研究院上海200127 上海市浦东新区高桥镇小学上海200137

核心素养体系本身关注的是综合性素养,以落实“培养什么人”的教育目标。加强课程综合,注重关联,开展跨学科主题学习,强化课程协同育人功能,是新一轮课程改革的重要指向。以关联内容结构、融通核心素养、创设进阶活动、落实以评促学作... 详细信息

核心素养体系本身关注的是综合性素养,以落实“培养什么人”的教育目标。加强课程综合,注重关联,开展跨学科主题学习,强化课程协同育人功能,是新一轮课程改革的重要指向。以关联内容结构、融通核心素养、创设进阶活动、落实以评促学作为跨学科学习设计的路径,精准把握跨学科学习的取向,避免学科间的简单“拼盘”,从而真正实现课程的协同育人。

关键词：跨学科主题学习协同育人核心素养

从《燕行录》地名用字来看“堡”字的读音演变

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语言研究 2025年第1期45卷 61-64页

作者：姚晓娟汪银峰长春师范大学文学院

文章从《燕行录》地名用字“堡”“铺”混用入手，探讨现代汉语“堡”字pu音的产生及原因，进而梳理多音字“堡”的读音演变。研究认为除了bǎo音，文献著录的其他三个读音bǔ、pǔ和pù，均源于明代“堡”“铺”功能混淆，导致地名用... 详细信息

文章从《燕行录》地名用字“堡”“铺”混用入手，探讨现代汉语“堡”字pu音的产生及原因，进而梳理多音字“堡”的读音演变。研究认为除了bǎo音，文献著录的其他三个读音bǔ、pǔ和pù，均源于明代“堡”“铺”功能混淆，导致地名用字“堡”“铺”混称，“堡”字受“铺”读音影响产生的。由于方言读音差异，故略有不同。

关键词：《燕行录》地名读音 “堡”与“铺”

A SHIFT-SPLITTING PRECONDITIONER FOR NON-HERMITIAN POSITIVE DEFINITE MATRICES

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Journal of Computational Mathematics 2006年第4期24卷 539-552页

作者： Zhong-zhi Bai Jun-feng yin Yang-feng Su LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100080 China Department of Mathematics Fudan University Shanghai 200433 China

A shift splitting concept is introduced and, correspondingly, a shift-splitting iteration scheme and a shift-splitting preconditioner are presented, for solving the large sparse system of linear equations of which the coefficient matrix is an ill-conditioned non-Hermitian positive definite matrix. The convergence property of the shift-splitting iteration method and the eigenvalue distribution of the shift-splitting preconditioned matrix are discussed in depth, and the best possible choice of the shift is investigated in detail. Numerical computations show that the shift-splitting preconditioner can induce accurate, robust and effective preconditioned Krylov subspace iteration methods for solving the large sparse non-Hermitian positive definite systems of linear equations.

关键词： Non-Hermitian positive definite matrix Matrix splitting Preconditioning Krylov subspace method Convergence.

Restarted Full Orthogonalization Method with Deflation for Shifted Linear Systems

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Numerical Mathematics(Theory,Methods and Applications) 2014年第3期7卷 399-412页

作者： Jun-feng yin Guo-Jian yin Department of Mathematics Tongji University1239 Siping RoadShanghai 200092P.R.China Department of Mathematics The Chinese University of Hong KongShatinNTHong Kong

In this paper,we study shifted restated full orthogonalization method with deflation for simultaneously solving a number of shifted systems of linear *** analysis shows that with the deflation technique,the new residual of shifted restarted FOM is still collinear with each ***,the new approach can solve the shifted systems simultaneously based on the same Krylov *** experiments show that the deflation technique can significantly improve the convergence performance of shifted restarted FOM.

关键词： Shifted linear systems full orthogonalization method restarted Arnoldi process deflation collinear

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城市未来社区公共空间设计探究

工程建设与设计 2025年第2期 1-3页

作者：何银丰陆罡浙江省建筑设计研究院有限公司杭州310000

随着居民需求的日益多样化和个性化,科学合理地规划与设计未来社区公共空间,以满足居民多元化需求,提升社区整体功能与服务水平,已势在必行。基于此,论文对未来社区进行了简要分析,探讨城市未来社区公共空间的设计原则,从打造共享空间... 详细信息

随着居民需求的日益多样化和个性化,科学合理地规划与设计未来社区公共空间,以满足居民多元化需求,提升社区整体功能与服务水平,已势在必行。基于此,论文对未来社区进行了简要分析,探讨城市未来社区公共空间的设计原则,从打造共享空间、创建生态空间、完善学习空间、构造智能空间4个方面提出设计策略。

关键词：始版桥未来社区公共空间设计

Uniform Estimate for The Tail Probabilities of Randomly Weighted Sums

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Acta Mathematicae Applicatae Sinica 2014年第4期30卷 1063-1072页

作者： yin-feng WANG Chuan-cun yin Xin-sheng ZHANG Department of Statistics Fudan University School of Business Shanghai Dianji University School of Mathematical Sciences Qufu Normal University

Several authors have studied the uniform estimate for the tail probabilities of randomly weighted *** their maxima. In this paper, we generalize their work to the situation thatis a sequence of upper tail asymptotically independent random variables with common distribution from the is a sequence of nonnegative random variables, independent of and satisfying some regular conditions. Moreover. no additional assumption is required on the dependence structureof {θi,i≥ 1）.

关键词： uniform estimate randomly weighted sums upper tail asymptotically independence class D ∩ζ

Soluble ST2:A Novel Biomarker for Diagnosis and Prognosis of Cardiovascular Disease

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Current Medical Science 2024年第4期44卷 669-679页

作者： yin feng Li-qun HE Department of Cardiology Traditional Chinese and Western Medicine Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan430030China

The increasing incidence of cardiovascular disease(CVD)is a significant global health concern,affecting millions of individuals each *** diagnosis of acute CVD poses a formidable challenge,as misdiagnosis can significantly decrease patient survival *** biomarkers have played a vital role in the diagnosis and prognosis of CVDs,but they can be influenced by various factors,such as age,sex,and renal *** ST2(sST2)is a novel biomarker that is closely associated with different *** low reference change value makes it suitable for continuous measurement,unaffected by age,kidney function,and other confounding factors,facilitating risk stratification of ***,the combination of sST2 with other biomarkers can enhance diagnostic accuracy and prognostic *** review aims to provide a comprehensive overview of sST2,focusing on its diagnostic and prognostic value as a myocardial marker for different types of CVDs and discussing the current limitations of sST2.

关键词： soluble ST2 cardiovascular disease combined biomarker diagnosis and prognosis limitations