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Sn影响镁合金显微组织和力学性能的研究现状及进展

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特种铸造及有色合金 2024年第3期44卷 305-316页

作者：吴宗钢韦皓博陈洁仪阮世会李晏杨明波重庆理工大学材料科学与工程学院重庆400050

综述了Sn单独添加以及Sn与其他元素复合添加对Mg-Al、Mg-Zn、Mg-Li或Mg-RE系等商用镁合金显微组织及力学性能影响的研究现状,并对Mg-Al-Sn、Mg-Sn-Zn、Mg-Sn-Mn、Mg-Sn-Ca/Sr、Mg-Sn-Bi和Mg-Sn-RE基等新型含Sn镁合金的研究开发进行了介绍。

关键词：镁合金含Sn镁合金显微组织力学性能

Zr对Mg-12Gd-4Y-1Zn镁合金挤压态显微组织和力学性能的影响

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特种铸造及有色合金 2024年第4期44卷 559-564页

作者：韦皓博陈洁仪吴宗钢阮世会李晏杨明波重庆理工大学材料科学与工程学院重庆400054

基于Mg-12Gd-4Y-1Zn试验镁合金,研究了Zr含量对合金挤压后显微组织和力学性能的影响。结果表明,在Mg-12Gd-4Y-1Zn镁合金中添加0.6%~1.2%(质量分数,下同)的Zr对合金组织中的第二相类型没有明显影响,但含Zr合金的晶粒被明显细化,其中添加0... 详细信息

基于Mg-12Gd-4Y-1Zn试验镁合金,研究了Zr含量对合金挤压后显微组织和力学性能的影响。结果表明,在Mg-12Gd-4Y-1Zn镁合金中添加0.6%~1.2%(质量分数,下同)的Zr对合金组织中的第二相类型没有明显影响,但含Zr合金的晶粒被明显细化,其中添加0.9%的Zr后合金的晶粒细化效果最佳。此外,添加0.6%~1.2%的Zr也可以明显改善合金挤压后的室温抗拉性能,其中添加0.9%的Zr后合金挤压后的抗拉强度和屈服强度相对较高,而添加1.2%的Zr的合金挤压后的伸长率相对较高。总体而言,添加0.9%的Zr可以使Mg-12Gd-4Y-1Zn试验合金挤压后获得较佳的综合力学性能。

关键词：镁合金 Mg-Gd-Y-Zn-Zr 晶粒细化抗拉强度

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双级时效对Mg-13Gd-5Y-0.6Mn-0.5Ca挤压镁合金析出相和力学性能的影响

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特种铸造及有色合金 2024年第6期44卷 803-807页

作者：韦皓博陈洁仪吴宗钢阮世会李晏杨明波重庆理工大学材料科学与工程学院重庆400054

研究了双级时效对Mg-13Gd-5Y-0.6Mn-0.5Ca挤压镁合金平衡相析出和力学性能的影响。结果表明,双级时效和单级时效均可有效提升试验镁合金的室温力学性能,但前者对于试验镁合金挤压后力学性能的提升明显高于后者,伸长率从挤压态的1.8%提升... 详细信息

研究了双级时效对Mg-13Gd-5Y-0.6Mn-0.5Ca挤压镁合金平衡相析出和力学性能的影响。结果表明,双级时效和单级时效均可有效提升试验镁合金的室温力学性能,但前者对于试验镁合金挤压后力学性能的提升明显高于后者,伸长率从挤压态的1.8%提升到2.5%。双级时效进一步改善试验合金性能的机理为促进Mg5Gd平衡相的析出。

关键词：镁合金 Mg-13Gd-5Y-0.6Mn 双级时效伸长率

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Opening-up Domestic Bond Market in the Support of China’s Supply-Side Reform

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Psychology Research 2022年第8期12卷 620-627页

作者： chen jieyi University of Edinburgh Edinburghthe United Kingdom

This paper studies the opening-up of domestic bond market in the support of China’s supply-side reform by examining the five core elements about the reform,namely overcapacity trimming,inventory de-stocking,financial deleveraging,cost reduction,and improvement of weak links in the *** examining the relationship between bond market opening-up and each element of the reform,the paper comes to the conclusion that the opening-up of domestic bond market is supportive to China’s supply-side reform.

关键词： opening-up bond market China’s supply-side reform Panda Bond

Influence of self-similar stresses on scenario earthquake construction:An example along the Tanlu Fault

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Science China Earth Sciences 2024年第5期67卷 1687-1697页

作者： Feng HU Huajian YAO Houyun YU Zeyu LU jieyi HOU Song LUO Zhigang SHAO Xiaofei chen School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Mengcheng Geophysical National Field Scientific Observatory Hefei 230026China Department of Earth and Space Science Southern University of Science and TechnologyShenzhen 518055China Institute of Earthquake Prediction China Earthquake AdministrationBeijing 100036China

As a famous deep and large fault in eastern China,the Tanlu Fault passes through Anhui,Jiangsu,and Shandong and into northeastern *** is important to improve the understanding of seismic hazard assessments in areas near *** start a scenario earthquake simulation in the M7.5 earthquake potential area of the Xinyi-Sihong segment of the Tanlu *** fault rupture length and width are constrained according to the scaling law of large intraplate earthquakes,the background normal stress is depth dependent,and the initial shear stresses are determined using trial and error by matching the earthquake *** the 120 km rupture length of the M7.5 earthquake,we compare the horizontal uniform stress model and self-similar stress perturbation *** findings reveal that the seismic source time function of the horizontal uniform stress model is similar to that of the Haskell model and that of the self-similar stress perturbation model is more similar to that of a real earthquake *** compare the dynamic rupture simulation and ground motion results under four different stress conditions and find that the shorter the characteristic length of the self-similar function is,the rougher the initial *** the M7.5earthquake with an epicenter in the vicinity of Suqian,the Xinyi-Tancheng segment,which is located in the IX-intensity zone north of the epicenter,vibrates more strongly on the northern side than on the southern side due to the influence of the lowvelocity zone and the peak slip *** response spectra analysis at stations in the study area is useful for improving the earthquake resistance capability.

关键词： Scenario earthquakes Self-similar stress Tanlu Fault Dynamic rupture Ground motion

A custom-designed panel sequencing study in 201 Chinese patients with craniosynostosis revealed novel variants and distinct mutation spectra

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Journal of Genetics and Genomics 2021年第2期48卷 167-171页

作者： Yingzhi Wu Meifang Peng jieyi chen Jinlong Suo Sihai Zou Yanqing Xu Andrew O.M.Wilkie Weiguo Zou Xiongzheng Mu Sijia Wang Department of Plastic Surgery Huashan HospitalFudan UniversityShanghai 200040China State Key Laboratory of Genetic Engineering at School of Life Sciences Fudan UniversityShanghai 200011China CAS Key Laboratory of Computational Biology CAS-MPG Partner Institute for Computational BiologyShanghai Institute of Nutrition and HealthUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200031China The State Key Laboratory of Cell Biology CAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200031China Department of Oral and Maxillofacial Surgery Affiliated Hospital of StomatologyChongqing Medical UniversityChongqing 401147China Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences Chongqing 401147China Forest Ridge School of the Sacred Heart BellevueWA 98006USA MRC Weatherall Institute of Molecular Medicine University of OxfordJohn Radcliffe HospitalOxford 0X39DSUK Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming 650223China

Craniosynostosis is a rare disease in which one or more of the cranial sutures in an infant skull prematurely fuses by turning into bone,with a prevalence of 1 in 2,000—2,500 individuals from reports in Western countries(Wilkie et al.,2017).It may restrict the growth of the brain,leading to some degree of morphological and functional abnormalities,and may affect the neurocognitive function of infants(Lattanzi et al.,2017).Genetic variants underlying craniosynostosis have been identified in cohort studies in Western populations.

关键词： patients turning

Single cell analysis unveils B cell-dominated immune subtypes in HNSCC for enhanced prognostic and therapeutic stratification

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International Journal of Oral Science 2024年第3期16卷 448-459页

作者： Kang Li Caihua Zhang Ruoxing Zhou Maosheng cheng Rongsong Ling Gan Xiong jieyi Ma Yan Zhu Shuang chen Jie chen Demeng chen Liang Peng State Key Laboratory of Oncology in South China Department of Oral and Maxillofacial SurgeryInstitute of Precision MedicineCenter for Translational MedicineThe First Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina Institute for Advanced Study Shenzhen UniversityShenzhenChina Hospital of Stomatology Guangdong Provincial Key Laboratory of StomatologyGuanghua School of StomatologySun Yat-Sen UniversityGuangzhouChina Senior Department of Oncology The Fifth Medical Center of PLA General HospitalBeijingChina

Head and neck squamous cell carcinoma(HNSCC)is characterized by high recurrence or distant metastases rate and the prognosis is *** is mounting evidence that tumor-infiltrating B cells(TIL-Bs)have a crucial,synergistic role in tumor ***,little is known about the role TIL-Bs play in immune microenvironment and the way TIL-Bs affect the outcome of immune checkpoint *** single-cell RNA sequencing(scRNA-seq)data from the Gene Expression Omnibus(GEO)database,the study identified distinct gene expression patterns in *** samples were categorized into TIL-Bs inhibition and TIL-Bs activation groups using unsupervised *** classification was further validated with TCGA HNSCC data,correlating with patient prognosis,immune cell infiltration,and response to *** found that the B cells activation group exhibited a better prognosis,higher immune cell infiltration,and distinct immune checkpoint levels,including elevated PD-L1.A prognostic model was also developed and validated,highlighting four genes as potential biomarkers for predicting survival outcomes in HNSCC ***,this study provides a foundational approach for B cells-based tumor classification in HNSCC,offering insights into targeted treatment and immunotherapy strategies.

关键词： prognosis elevated offering

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中国城市规模分布异化的资源错配效应研究

当代经济科学 2023年第3期45卷 44-58页

作者：张少华陈洁仪广州大学经济与统计学院广东广州510006

从城市规模分布的角度切入,探索城市规模分布偏离最优城市规模对城市资源错配的影响程度,考察产业专业化集聚和多样化集聚在其中的作用机制,分析不同产业集聚模式和不同级别城市规模的共荣发展形式。研究发现:(1)中国城市规模分布异化... 详细信息

从城市规模分布的角度切入,探索城市规模分布偏离最优城市规模对城市资源错配的影响程度,考察产业专业化集聚和多样化集聚在其中的作用机制,分析不同产业集聚模式和不同级别城市规模的共荣发展形式。研究发现:(1)中国城市规模分布异化显著恶化了城市层面的资源错配情况,而且不合理的城市规模分布造成了城市层面的资本错配而非劳动错配。(2)从资源配置区域来看,中部地区和收缩型城市的资源错配更为严重,形成了城市和产业发展中的“中部塌陷效应”;从资源配置程度来看,当存在资本配置过剩和劳动配置过剩时,不合理的城市规模分布将加剧城市层面的资源错配,说明城市层面的要素过度投入将导致城市的规模经济效应转变为拥挤效应,不利于城市和产业的共荣发展。(3)尽管不合理的城市规模分布会造成城市层面的资源错配,但是专业化集聚可以缓解这种效应。进一步分析表明,大城市更适合多样化集聚而非专业化集聚,而中小城市更适合专业化集聚而非多样化集聚。因此,优化城市规模分布,进而改善中国资源错配状况,是新常态时期城市经济高质量发展与区域协调发展的有效途径。

关键词：城市化城市规模资源错配产业集聚产业结构产业协调

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Profile of *** chen

Science China(Life Sciences) 2024年第10期67卷 2062-2063页

作者： chen, Songlin Yellow Sea Fisheries Res Inst Qingdao Peoples R China

For decades,*** has been engaged in fish germplasm preservation,sex control and research focusing on molecular breeding for disease *** discovered the first sex-specific molecular marker of fish(chen et al.,2007),deciphered the first fish genome(Chinese tongue sole)in China,revealed the sex determination mechanism in fish(chen et al.,2014),and created molecular sex control *** also discovered the molecular mechanism of metamorphosis in flatfish(Shao et al.,2017)and developed China's first fish disease-resistant breeding gene chip,“YUXIN No.1”.

关键词： technology breeding