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Computer Modeling in Engineering & Sciences 2024年第8期140卷 1405-1427页

作者： Sen-Hui Wang Xi Kang Cheng Wang Tian-Bing Ma Xiang He ke yang School of Mechatronics Engineering Anhui University of Science and TechnologyHuainan232001China Institute of Energy Hefei Comprehensive National Science CenterHefei230031China

Accurately predicting the remaining useful life(RUL)of bearings in mining rotating equipment is vital for mining *** research aims to distinguish the features associated with the RUL of bearings and propose a prediction model based on these selected *** study proposes a hybrid predictive model to assess the RUL of rolling element *** proposed model begins with the pre-processing of bearing vibration signals to reconstruct sixty time-domain *** hybrid model selects relevant features from the sixty time-domain features of the vibration signal by adopting the RReliefF feature selection ***,the extreme learning machine(ELM)approach is applied to develop a predictive model of RUL based on the optimal *** model is trained by optimizing its parameters via the grid search *** training datasets are adjusted to make them most suitable for the regression model using the cross-validation *** proposed hybrid model is analyzed and validated using the vibration data taken from the public XJTU-SY rolling element-bearing *** comparison is constructed with other traditional *** experimental test results demonstrated that the proposed approach can predict the RUL of bearings with a reliable degree of accuracy.

关键词： Bearing degradation remaining useful life estimation RReliefF feature selection extreme learning machine

Ultrahard X-ray multifunctional application beamline at the SSRF

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Nuclear Science and Techniques 2024年第6期35卷 14-25页

作者： ke yang Zhao-Hui Dong Chun-Yin Zhou Zi-Long Zhao Dong-Xu Liang Sai-Chao Cao Ai-Guo Li Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

The ultrahard X-ray multifunctional application beamline(BL12SW)is a phase-II beamline project at the Shanghai Syn-chrotron Radiation *** primary X-ray techniques used at the beamline are high-energy X-ray diffraction and imaging using white and monochromatic *** main scientific objectives of ultrahard X-ray beamlines are focused on two research *** is the study of the structural properties of Earth’s interior and new materials under extreme high-temperature and high-pressure conditions,and the other is the characterization of materials and processes in near-real service *** beamline utilizes a superconducting wiggler as the light source,with two diamond windows and SiC discs to filter out low-energy light(primarily below 30 keV)and a Cu filter assembly to control the thermal load entering the subsequent optical *** beamline is equipped with dual *** first was a meridional bending Laue monochromator cooled by liquid nitrogen,achieving a full-energy coverage of 30-162 *** second was a sagittal bending Laue monochromator installed in an external building,providing a focused beam in the horizontal direction with an energy range of 60-120 *** were four experimental hutches:two large-volume press experimental hutches(LVP1 and LVP2)and two engineering material experimental hutches(ENG1 and ENG2).Each hutch was equipped with various near-real service conditions to satisfy different *** example,LVP1 and LVP2 were equipped with a 200-ton DDIA press and a 2000-ton dual-mode(DDIA and Kawai)press,***1 and ENG2 provide in situ tensile,creep,and fatigue tests as well as high-temperature *** June 2023,the BL12SW has been in trial *** is expected to officially open to users by early 2024.

关键词： Shanghai Synchrotron Radiation Facility Ultrahard X-ray High energy diffraction High energy imaging Engineering materials Earth science

Two imprinted genes primed by DEMETER in the central cell and activated by WRKY10 in the endosperm

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Journal of Genetics and Genomics 2024年第8期51卷 855-865页

作者： ke yang Yuling Tang Yue Li Wenbin Guo Zhengdao Hu Xuanpeng Wang Frédéric Berger Jing Li College of Life Science and Technology Huazhong Agricultural UniversityWuhanHubei 430070China Sanya Institute of Breeding and Multiplication Hainan UniversitySanyaHainan 572025China School of Tropical Agriculture and Forestry Hainan UniversityHaikouHainan 570228China Hainan Yazhou Bay Seed Laboratory SanyaHainan 572025China Gregor Mendel Institute Austrian Academy of SciencesVienna BioCenter1030 ViennaAustria

The early development of the endosperm is crucial for balancing the allocation of maternal nutrients to *** process is believed to be evolutionarily associated with genomic imprinting,resulting in parentally biased allelic gene *** Fertilization Independent Seed(FIS)genes,the number of imprinted genes involved in early endosperm development and seed size determination remains *** study introduces early endosperm-expressed HAIKU(IKU)downstream Candidate F-box 1(ICF1)and ICF2 as maternally expressed imprinted genes(MEGs)in Arabidopsis *** these genes are also demethylated by DEMETER(DME)in the central cell,their activation differs from the direct DME-mediated activation seen in classical MEGs such as the FIS ***,ICF maternal alleles carry pre-established hypomethylation in their promoters,priming them for activation by the WRKY10 transcription factor in the *** the contrary,paternal alleles are predominantly suppressed by CG ***,we find that ICF genes partially contribute to the small seed size observed in iku *** discovery reveals a two-step regulatory mechanism that highlights the important role of conventional transcription factors in the activation of imprinted genes,which was previously not fully ***,the mechanism provides a new dimension to understand the transcriptional regulation of imprinting in plant reproduction and development.

关键词： Imprinting Epigenetics DNAmethylation Seedsize Endosperm

The non-canonical poly(A)polymerase FAM46C promotes erythropoiesis

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Journal of Genetics and Genomics 2024年第6期51卷 594-607页

作者： ke yang Tiangi Zhu Jiaying Yin Qiaoli Zhangg Jing Li Hong Fan Gajing Han Weiyin Xu Nan Liu Xiang Lv Bone Marrow Transplantation Center The First Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310003China Liangzhu Laboratory Zhejang UniversityHangzhouZhejang 311121China Institute of Hematology Zhejiang UniversityHangzhouZhejiang 311121China The State key Laboratory for Complex Severeand Rare DiseasesHaihe Laboratory of Cell EcosystemDepartment of PathophysiologyInstitute of Basic Medical SciencesChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China Medical Epigenetics Research Center Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China

The post-transcriptional regulation of mRNA is a crucial component of gene *** disruption of this process has detrimental effects on the normal development and gives rise to various *** for novel post-transcriptional regulators and exploring their roles are essential for understanding development and *** a multimodal analysis of red blood cell trait genome-wide association studies(GWAS)and transcriptomes of erythropoiesis,we identify FAM46C,a non-canonical RNA poly(A)polymerase,as a necessary factor for proper red blood cell ***46C is highly expressed in the late stages of the erythroid lineage,and its developmental upregulation is controlled by an erythroidspecific *** demonstrate that FAM46C stabilizes mRNA and regulates erythroid differentiation in a polymerase activity-dependent ***,we identify transcripts of lysosome and mitochondria components as highly confident in vivo targets of FAM46C,which aligns with the need of maturing red blood cells for substantial clearance of organelles and maintenance of cellular redox *** conclusion,our study unveils a unique role of FAM46C in positively regulating lysosome and mitochondria components,thereby promoting erythropoiesis.

关键词： FAM46C TENT5C Poly(A)polymerase Erythroblasts Post-transcriptional regulation Erythroid-specific enhancer

Thickness dependence of superconductivity in layered GeP_(5)

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Rare Metals 2024年第3期43卷 1323-1328页

作者： Lin Wu ke-Meng yang Wei Gan Rui-Chun Xiao Ya-Jie Dai Xi Tang Hong Lin Hui Han Hui Li Information Materials and Intelligent Sensing Laboratory of Anhui Province Institute of Physical Science and Information TechnologyAnhui UniversityHefei230601China

Understanding the relationship between dimensionality and superconductivity has attracted substantial research *** this work,we report the effective modulation of superconductivity in GeP_(5)through *** superconducting phase transition temperature improves by~10%as the thickness of GeP_(5)decreases from bulk to~96 nm,behaving as a unique negative relationship between the superconducting phase transition temperatureand thickness.

关键词： superconductivity dimensionality

数字经济对先富地区带动后富地区的影响——基于空间调节效应的实证检验

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技术经济与管理研究 2024年第7期 37-42页

作者：杨可吉林大学党委组织部吉林长春130012 吉林大学东北亚学院吉林长春130012

中国式现代化是全体人民共同富裕的现代化。选取2003—2020年285个城市面板数据,通过构建空间外溢的区域经济增长收敛模型,实证检验数字经济如何促进先富地区带动后富地区实现共同富裕。研究发现:先富地区经济增长能够显著带动后富地区... 详细信息

中国式现代化是全体人民共同富裕的现代化。选取2003—2020年285个城市面板数据,通过构建空间外溢的区域经济增长收敛模型,实证检验数字经济如何促进先富地区带动后富地区实现共同富裕。研究发现:先富地区经济增长能够显著带动后富地区经济增长,数字经济在其中发挥了正向空间调节效应。通过研究省际分界线这一准自然实验发现,省际层面的制度性分割抑制了数字经济影响先富地区经济增长的空间调节效应。空间异质性分析发现,东部地区、西部地区中数字经济对先富地区经济增长的空间调节效应显著为正,中部地区不显著。对此,各级部门需加紧数字基础设施建设,改变地方政府目标函数、动力结构和行为方式,开展跨区域合作,为先富带动后富创造有利条件。

关键词：数字经济共同富裕地区经济经济增长

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银行网络结构与系统性金融风险传染

系统工程理论与实践 2024年第7期44卷 2120-2136页

作者：杨科王健辰田凤平华南理工大学经济与金融学院广州510006 中山大学国际金融学院广州510275 人工智能与数字经济广东省实验室(广州) 广州510330

随着我国银行业资金规模和成员数量的不断增加,愈发复杂的机构间关联网络逐渐成为潜在的风险传染渠道.本文采用GARCH-Copula-CoVaR模型测算了16家上市商业银行在系统性金融风险中的贡献规模,结合网络拓扑理论和滑动窗口法研究了银行网... 详细信息

随着我国银行业资金规模和成员数量的不断增加,愈发复杂的机构间关联网络逐渐成为潜在的风险传染渠道.本文采用GARCH-Copula-CoVaR模型测算了16家上市商业银行在系统性金融风险中的贡献规模,结合网络拓扑理论和滑动窗口法研究了银行网络结构特征的演化趋势,并进一步分析了银行网络结构对系统性金融风险传染的影响机制.研究结果表明:虽然银行部门“去中心化”效应愈发显著,网络稳定性和抗风险能力整体上得到改善,但仍应重视网络结构特征在系统性金融风险产生及辐射过程中起到的多重作用;处于网络中不同风险传染地位的银行同时满足宏微观审慎监管要求的难度存在较大差异,对极端风险敏感且在银行网络中扮演核心角色的银行更倾向于向整个系统输出更多风险,通常在风险传染过程中起主导作用;在危机时期,网络密度通常会出现剧烈变化,关联网络的稳定性失衡进一步加速了系统性金融风险的传染.本研究可为监管部门实时更新系统重要性银行名单和全面监管风险传染渠道提供思路,对提升金融市场抵御风险的能力以及防范和化解系统性风险等方面都具有重要的现实意义.

关键词：银行网络结构系统性金融风险影响机制

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不同力程排斥相互作用胶体粒子系统的摩擦特性

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物理学报 2024年第15期73卷 141-146页

作者：段浩炀杨柯欣曹义刚郑州大学物理学院:中原之光实验室郑州450001

利用朗之万分子动力学,数值研究了无序点钉扎衬底上二维胶体粒子系统的摩擦特性.本文考虑了三种不同的模型胶体粒子系统,每种系统中胶体粒子之间的相互作用均被模拟为两种不同力程的排斥势.研究发现:每种模型系统均存在两个最大静摩擦力... 详细信息

利用朗之万分子动力学,数值研究了无序点钉扎衬底上二维胶体粒子系统的摩擦特性.本文考虑了三种不同的模型胶体粒子系统,每种系统中胶体粒子之间的相互作用均被模拟为两种不同力程的排斥势.研究发现:每种模型系统均存在两个最大静摩擦力(第一最大静摩擦力f_(c1)^(d)和第二最大静摩擦力f_(c2)^(d));力程相近的短程排斥相互作用之间的干涉会导致粒子间排斥增强,从而导致f_(c1)^(d)的明显降低和f_(c2)^(d)以上沿外场驱动力方向上运动有序的加强.本文的研究结果有助于揭示具有不同力程相互作用胶体粒子系统的摩擦机制.

关键词：摩擦胶体塑性流动运动有序

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基于事件逻辑的PUFs认证协议形式化分析

华中科技大学学报（自然科学版） 2024年第2期52卷 69-76页

作者：钟小妹肖美华杨科罗运先华东交通大学软件学院江西南昌330013

提出两个事件时序概念与相关规则,用于分析事件关联消息类型为挑战数的时态性质,形式化抽象物理不可克隆函数(PUFs)随机会话秘钥生成功能,扩展事件逻辑(LoET)用于形式化分析PUFs安全协议的理论.以一个基于SRAM PUFs(基于静态随机存取存... 详细信息

提出两个事件时序概念与相关规则,用于分析事件关联消息类型为挑战数的时态性质,形式化抽象物理不可克隆函数(PUFs)随机会话秘钥生成功能,扩展事件逻辑(LoET)用于形式化分析PUFs安全协议的理论.以一个基于SRAM PUFs(基于静态随机存取存储器的PUF类型)的安全双向认证协议分析为例,形式化规约了协议基于PUFs随机秘钥生成和双向认证过程,基于扩展的事件逻辑,采用定理证明方法推理证明了该协议在合理假设下满足双向强认证性质.研究表明扩展的事件逻辑理论可用于设计和分析基于PUFs安全协议.

关键词：形式化方法事件逻辑(LoET) 物理不可克隆函数(PUFs) 双向认证协议定理证明

带p-Laplacian算子的分数阶微分方程半正系统正解的存在性

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东北师大学报（自然科学版） 2024年第1期56卷 29-39页

作者：杨可丽吴克晴江西理工大学理学院江西赣州341000

对一类带有p-Laplacian算子和含有分数阶积分的奇异非线性项的Riemann-Liouville型分数阶微分方程半正系统正解的存在性进行了分析与研究,其边界条件包括不同阶的分数阶导数、Riemann-Stieltjes积分和无穷点边值条件.基于相关Green函数... 详细信息

对一类带有p-Laplacian算子和含有分数阶积分的奇异非线性项的Riemann-Liouville型分数阶微分方程半正系统正解的存在性进行了分析与研究,其边界条件包括不同阶的分数阶导数、Riemann-Stieltjes积分和无穷点边值条件.基于相关Green函数的性质以及不动点指数定理,得到了参数属于合适区间时,该系统至少存在一个正解的充分条件.通过具体实例验证了所得结果的实用性.

关键词： p-Laplacian算子 Riemann-Liouville分数阶微分系统半正系统正解

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