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Microstructure Evolution and Mechanical Properties of Friction Stir Welded Al-Cu-Li Alloy

Acta Metallurgica Sinica(English Letters) 2024年第5期37卷 855-871页

作者： Peng chen Wenhao chen jiaxin chen Zhiyu chen Yang Tang Ge Liu Bensheng Huang Zhiqing Zhang School of New Energy and Materials Southwest Petroleum UniversityChengdu 610500China Sichuan Provincial Engineering Research Center of Advanced Materials Manufacturing Technology for Shale Gas High-Efficient Exploitation Southwest Petroleum UniversityChengdu 610500China College of Materials Science and Engineering Chongqing UniversityChongqing 400045China School of Mechatronic Engineering Southwest Petroleum UniversityChengdu 610500China School of Robot Engineering Yangtze Normal UniversityChongqing 408100China

The investigation concentrates on friction stir welded(FSW)Al-Cu-Li alloy concerning its local microstructural evolution and mechanical *** grain features were characterized by electron back scattered diffraction(EBSD)technology,while precipitate characterization was conducted by using transmission electron microscopy(TEM)aligned along[011]Al and[001]Al zone *** mechanical properties are evaluated through micro-hardness and tensile *** can be found that nugget zones exhibit finely equiaxed grains evolved through complete dynamic recrystallization(DRX),primarily occurring in continuous dynamic recrystallization(CDRX)and discontinuous dynamic recrystallization(DDRX).In the thermal-mechanically affected zone(TMAZ),numerous sub-structured grains,exhibiting an elongated morphology,were created due to partial DRX,signifying the dominance of CDRX,DDRX,and geometric dynamic recrystallization(GDRX)in this region.T_(1)completely dissolves in the nugget zone(NZ)leading to the formation of Guinier-Preston zones and increase ofδ′,β′and S′.Conversely,T_(1)partially solubilizes in TMAZ,the lowest hardness zone(LHZ)and heat affected zone(HAZ),and the residual T_(1)undergoes marked coarsening,revealing various T_(1)*** solubilization and coarsening of T_(1)are primary contributors to the degradation of hardness and strength.θ′primarily dissolves and coarsens in NZ and TMAZ,whilst this precipitate largely coarsens in HAZ and LHZ.σ,TB,grain boundary phases(GBPs)and precipitate-free zone(PFZ)are newly generated during FSW.σexists in the TMAZ,LHZ and HAZ,whereas TB nucleates in *** and PFZ mostly develop in LHZ and HAZ,which can cause strain localization during tensile deformation,potentially leading to LHZ joint fracture.

关键词： Al-Cu-Li alloy Friction stir welding Microstructure evolution Mechanical properties

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Reinforcement Learning-Based Energy Management for Hybrid Power Systems:State-of-the-Art Survey,Review,and Perspectives

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Chinese Journal of Mechanical Engineering 2024年第3期37卷 1-25页

作者： Xiaolin Tang jiaxin chen Yechen Qin Teng Liu Kai Yang Amir Khajepour Shen Li College of Mechanical and Vehicle Engineering Chongqing UniversityChongqing 400044China School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081China Department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooON N2L 3G1Canada School of Civil Engineering Tsinghua UniversityBeijing 100084China

The new energy vehicle plays a crucial role in green transportation,and the energy management strategy of hybrid power systems is essential for ensuring energy-efficient *** paper presents a state-of-the-art survey and review of reinforcement learning-based energy management strategies for hybrid power ***,it envisions the outlook for autonomous intelligent hybrid electric vehicles,with reinforcement learning as the foundational *** of all,to provide a macro view of historical development,the brief history of deep learning,reinforcement learning,and deep reinforcement learning is presented in the form of a ***,the comprehensive survey and review are conducted by collecting papers from mainstream academic *** most of the contributions based on three main directions—algorithm innovation,powertrain innovation,and environment innovation—provides an objective review of the research ***,to advance the application of reinforcement learning in autonomous intelligent hybrid electric vehicles,future research plans positioned as“Alpha HEV”are envisioned,integrating Autopilot and energy-saving control.

关键词： New energy vehicle Hybrid power system Reinforcement learning Energy management strategy

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Microbiome subsets determine tumor prognosis and molecular characteristics of clear-cell renal cell carcinoma:a multi-center integrated analysis of microbiome,metabolome,and transcriptome data

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Frontiers of Medicine 2024年第2期18卷 399-402页

作者： Wenjin chen Xiuwu Pan Wang Zhou Da Xu jiaxin chen Keqin Dong Weijie chen Brian Rini Xingang Cui Department of Urology Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghai200092China Department of Urology Third Affiliated Hospital of the Second Military Medical UniversityShanghai201805China Division of Hematology Oncology Vanderbilt University Medical CenterNashvilleTN37232USA

Dear editor,Patients with clear-cell renal cell carcinoma(ccRCC)potentially have a high recurrence rate of more than 40%[1].Patients receive radical or partial nephrectomy,sometimes assisted by targeted therapies or/and immune checkpoint inhibitors(ICIs),to improve overall survival(OS)[2].Large-cohort studies and large-scale human tissue sequencing have provided a series of molecular subtyping methods for precision medicine-based ccRCC risk stratification and therapeutic regimens,such as ClearCode34,the prognostic risk predictor[3],and seven subsets for ICI and angiogenesis blockade outcomes[4].However,these subtyping results are all based on human genomes without including the host microbiota,which may be non-negligible genome components.

关键词： editor negligible characteristics

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CircZFR promotes colorectal cancer progression via stabilizing BCLAF1 and regulating the miR-3127-5p/RTKN2 axis

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Science China(Life Sciences) 2024年第9期67卷 1881-1898页

作者： jiaxin chen Huijuan Wang Jianbin Xu Engeng chen Qing Meng Jiawei Wang Haoyi Xiang Wei Zhou Ge Shan Zhenyu Ju Zhangfa Song Department of Colorectal Surgery Sir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310016China Key Laboratory of Biological Treatment of Zhejiang Province Hangzhou 310016China Department of Pulmonary and Critical Care Medicine Regional medical center for National Institute of Respiratory DiseaseSir Run Run Shaw HospitalZhejiang University School of MedicineHangzhou 310016China Key Laboratory of Regenerative Medicine of Ministry of Education Institute of Aging and Regenerative MedicineJinan UniversityGuangzhou 510632China Department of Breast Surgery the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China Department of Orthopedic Surgery the Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China

Aberrant expression of circular RNAs(circ RNAs)is frequently linked to colorectal cancer(CRC).Here,we identified circ ZFR as a promising biomarker for CRC diagnosis and *** ZFR was upregulated in CRC tissues and serum exosomes and its level was linked to cancer incidence,advanced-stages,and *** both in vitro and in vivo settings,circ ZFR promoted the growth and spread while suppressing apoptosis of *** with circ ZFR overexpression promoted the proliferation and migration of cocultured CRC ***,epithelial splicing regulatory protein 1(ESRP1)in CRC cells may enhance the production of circ ***2-associated transcription factor 1(BCLAF1)bound to circ ZFR,which prevented its ubiquitinated ***,circ ZFR sponged mi R-3127-5p to boost rhotekin 2(RTKN2)*** TCP1-CD-QDs nanocarrier was able to carry and deliver circ ZFR si RNA(si-circ ZFR)to the vasculature of CRC tissues and cells,which inhibited the growth of tumors in patient-derived xenograft(PDX)*** together,our results show that circ ZFR is an oncogenic circ RNA,which promotes the development and spread of CRC in a BCLAF1 and mi R-3127-5p-dependent *** ZFR is a possible serum biopsy marker for the diagnosis and a desirable target for further treatment of CRC.

关键词： circZFR exosome ESRP1 BCLAF1 miR-3127-5p nanoparticle(NP)

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Revealing the formation mechanism of umami peptides in fermented broad bean paste based on peptidomics and macrogenomics

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Food Science and Human Wellness 2024年

作者： Yuqing Xie Jianhua Zhao Binbin Zhou Ping Liu Jie Zhao Min Xu jiaxin chen Hongbin Lin Jie Tang School of Food and Bio-engineering， Xihua University Chongqing Key Laboratory of Specialty Food Co-Built by Sichuan and Chongqing Chengdu Food Microbiology Key Laboratory of Sichuan Province

Umami peptides play important roles in the flavor of fermented broad bean paste (FBBP)， and proteases produced by microorganisms contributed to the production of umami peptides. In order to reveal the formation of umami peptides and their relationships with protease-producing microorganisms during the natural fermentation of FBBP， peptidomics and virtual screening were used to identify and screen umami peptides. Meanwhile， macrogenomics was used to analyze the abundance of microbial-derived protease genes during FBBP fermentation. Then， based on the Pearson correlation coefficient， the correlation network diagram of each protease-producing microorganism with umami peptides was constructed. The results showed that a total of two exopeptidases and four endopeptidases were annotated from FBBP. Staphylococcus， Lactobacillus， Aspergillus， and Weissella can produce most proteases. The species Lactobacillus＿curvatus， Dyella＿jiangningensis， Erythrobacter＿sp， and unclassified＿g＿Pantoea had strong correlation with umami peptides， and they may contribute to the process of protein hydrolysis to produce umami peptides. This study is expected to reveal the formation mechanism of umami peptides in FBBP， and the results of this study provided a better understanding of the relationship between proteases， microbiota， and core umami peptides in FBBP， which could help to improve the umami taste of Pixian Douban paste (PDBP) during fermentation.

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Evaluation of Application Value of 30 Introduced Flowering Shrubs in Landscape in Hefei City Based on AHP Method

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Journal of Landscape Research 2024年第3期16卷 70-72,79页

作者： DAI Mengting ZHAO Zhiyan GAO Feiyan GAO Miaomiao chen jiaxin Department of Architecture and Landscape Design Anhui Xinhua UniversityHefeiAnhui 230088China

The application effect of 30 introduced flowering shrubs in landscape in Hefei City was comprehensively evaluated by the analytic hierarchy process(APH).A comprehensive evaluation model was established by using factors such as plant type,resistance and drought tolerance of introduced flowering *** results show that the application effect of grade-I introduced flowering shrubs(including 12 kinds,***)was the best(j≥2.6),and that of grade-II introduced flowering shrubs(including 14 kinds,***×grandiflora‘Francis Mason’)was better(2.2≤j<2.6),while that of grade-III introduced flowering shrubs(including 4 kinds,***×vicaryi)was moderate(j<2.2).The evaluation results can provide reference for the application effect of introduced flowering shrubs in landscape in Hefei City.

关键词： Introduced flowering shrubs Landscape effect Comprehensive evaluation Analytic hierarchy process

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基于系统理论的中国-东盟网络安全合作系统构建研究

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情报杂志 2024年第2期43卷 33-40,24页

作者：肖军陈嘉鑫西南政法大学国家安全学院重庆401120 西南政法大学刑事侦查学院重庆401120

[研究目的]针对中国-东盟网络安全合作在观念、制度、人才、技术等方面存在的问题,构建合作系统框架,提出合作路径及解决方案,旨在提高中国-东盟网络安全合作的水平。[研究方法]通过文献分析,结合系统理论,从系统的要素、结构(功能)、... 详细信息

[研究目的]针对中国-东盟网络安全合作在观念、制度、人才、技术等方面存在的问题,构建合作系统框架,提出合作路径及解决方案,旨在提高中国-东盟网络安全合作的水平。[研究方法]通过文献分析,结合系统理论,从系统的要素、结构(功能)、环境等维度进行研究。[研究结论]中国与东盟在构建网络安全合作系统时可以实施以下路径:在系统要素方面,以网络空间命运共同体理念展开合作、以建立统一的网络安全制度规范框架进行合作、以构建网络安全人才培养培训教育体系保障合作、以创新网络安全技术加强合作;在系统结构(功能)方面,增强系统不同要素间的协同联动、准确把握系统要素最优与结构(功能)最优关系;在系统环境方面,在梳理可供利用的外部环境的基础上,重点利用经济、政治、文化环境优化系统。

关键词：中国-东盟网络安全合作网络空间命运共同体网络安全制度系统理论系统构建文献分析法

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长螺杆加强型胶合木梁柱节点力学性能

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同济大学学报（自然科学版） 2024年第5期52卷 759-767页

作者：舒展陈佳欣罗晶何敏娟上海大学力学与工程科学学院上海200444 上海师范大学建筑工程学院上海201418 同济大学土木工程学院上海200092

胶合木梁柱螺栓钢填板节点由于抗弯刚度较低,在结构设计中通常被视为铰接。提出了一种长螺杆加强型胶合木梁柱节点,为无支撑或剪力墙的中高层木结构体系中提供较好的刚性连接。设计并加工了3组不同长螺杆直径的节点试件,通过单调加载和... 详细信息

胶合木梁柱螺栓钢填板节点由于抗弯刚度较低,在结构设计中通常被视为铰接。提出了一种长螺杆加强型胶合木梁柱节点,为无支撑或剪力墙的中高层木结构体系中提供较好的刚性连接。设计并加工了3组不同长螺杆直径的节点试件,通过单调加载和往复加载试验探究了节点的抗弯刚度、抗弯承载力、破坏模式及耗能性能。通过ABAQUS有限元软件建立了节点力学模型,模拟结果与试验结果较为吻合,并基于该模型开展了参数分析。结果表明:该节点具有较高的抗弯刚度与抗弯承载力,经过合理构造后节点损伤主要集中在长螺杆,而长螺杆在破坏后易于更换,可提高节点韧性与使用寿命。参数分析结果表明,转动刚度与长螺杆直径及力臂呈正相关。基于试验与模拟的结果,提出了该类节点抗弯刚度及抗弯承载力的计算方法,为其在实际工程中的设计与应用提供参考。

关键词：木结构梁柱螺栓钢填板节点长螺杆刚性连接可更换构件抗震韧性

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术语英译中学者型译者身份与译者行为关系研究——以《淮南子》两译本中古代天文术语英译为例

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外国语文 2024年第1期40卷 110-121页

作者：许明武陈嘉昕华中科技大学外国语学院湖北武汉430074

2010年《淮南子》两部英译本问世,分别来自美国学者约翰·马绛团队和中国学者翟江月、牟爱鹏。基于“求真—务实”连续统评价模式,本研究对马译本和翟译本中230个天文术语英译的译者行为进行比较分析。研究发现,翻译内两译本均呈现“求... 详细信息

2010年《淮南子》两部英译本问世,分别来自美国学者约翰·马绛团队和中国学者翟江月、牟爱鹏。基于“求真—务实”连续统评价模式,本研究对马译本和翟译本中230个天文术语英译的译者行为进行比较分析。研究发现,翻译内两译本均呈现“求真为本,求真兼顾务实”的译者行为倾向,仅马译本有“译外超务实”倾向;学者型译者身份下“学者”和“译者”角色对两译本译者行为的影响程度不同,马译本充分保留“学者”特色,翟译本恪守“译者”本分。本研究考察了相同译者身份下译者行为的异同,进一步揭示了译者角色在翻译内外对译者行为的不同影响。

关键词：古代天文术语《淮南子》学者型译者 “求真—务实”

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人口老龄化与我国制造业智能化转型

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商业研究 2024年第2期 23-32页

作者：陈春明许雨佳陈佳馨哈尔滨理工大学经济与管理学院哈尔滨150040 中国社会科学院大学商学院北京102488

本文基于2011—2021年我国省级面板数据,构建中介效应模型实证检验老龄化对我国制造业智能化转型的作用机制。结果表明,总体上老龄化会促进我国制造业智能化转型,同时,人口老龄化还会通过以下路径对制造业智能化发展产生影响:人口老龄... 详细信息

本文基于2011—2021年我国省级面板数据,构建中介效应模型实证检验老龄化对我国制造业智能化转型的作用机制。结果表明,总体上老龄化会促进我国制造业智能化转型,同时,人口老龄化还会通过以下路径对制造业智能化发展产生影响:人口老龄化程度的加深将会推动技术创新,从而促进制造业向智能化转型;老年人口的不断增加使得家庭养老负担加重,挤占教育资本投入,进而通过抑制人力资本积累对制造业智能化转型产生不利影响;人口老龄化导致劳动力供给减少,冲击劳动力市场,提高劳动力成本,倒逼制造业进行智能化转型。

关键词：人口老龄化制造业智能化转型中介效应

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