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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1186-1200页

作者： Yujing Zhou siyi peng Yueling Guo Xiaoxiang Wu Changmeng Liu Zhiming Li School of Mechanical Engineering Beijing Institute of TechnologyBeijing100081China Shagang School of Iron and Steel Soochow UniversitySuzhou215137China School of Materials Science and Engineering Central South UniversityChangsha410083China

Here, the composition of TaMoNbZrTiAl refractory high entropy alloy (RHEA) is optimized by increasing Ti content to improve its mechanical property especially the ductility, through comparing two RHEAs with different Ti content. The RHEAs contain two body-centered-cubic (BCC) phases. The BCC phase in the dendritic region is rich in Ta, Mo and Nb, and the BCC phase in the interdendritic region is enriched in Zr, Ti and Al. The as-cast RHEA with a higher Ti content remains dendritic microstructures, and Ti is mainly enriched in the interdendritic region. After annealing treatment at 1300 ℃ for 48 h, the dendritic microstructures change into equiaxed-grain morphology, accompanied by needle-like micron precipitates at grain boundaries in the RHEA with higher Ti content. For the as-cast RHEAs, the fracture strain increases by ~ 6.6% and the uniform plastic strain increases by ~ 5.9% at the compression test due to the increase of Ti content. Our work offers a reference for the composition design of RHEAs and makes a preliminary exploration of the optimization of the microstructures and mechanical properties.

关键词： Refractory high entropy alloys Solidification Grain morphology Microstructure Mechanical property

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吉林省人参产业现状及发展建议

北方园艺 2024年第8期 136-142页

作者：车天浩彭思意闫昆梁运江延边大学农学院吉林延吉133002 哈尔滨师范大学计算机科学与信息工程学院黑龙江哈尔滨150500

吉林省作为我国乃至世界人参的主要产地,其人参产业的健康发展对中国特色农业的建设和地方经济的脱贫攻坚具有重要的示范意义。该研究采用相关的理论政策分析和吉林省人参产业园区实地调研的方法,从人参的产业结构、标准化体系、品牌建... 详细信息

吉林省作为我国乃至世界人参的主要产地,其人参产业的健康发展对中国特色农业的建设和地方经济的脱贫攻坚具有重要的示范意义。该研究采用相关的理论政策分析和吉林省人参产业园区实地调研的方法,从人参的产业结构、标准化体系、品牌建设和精深加工能力等情况,分析了现阶段吉林省人参产业的发展现状。面对韩国高丽参在世界市场的冲击、种参农户经营理念的落后、政府管控引导体系的缺乏、传统伐林种参模式的受限等问题,应大力推进人参在药食同源领域的发展、无公害农田栽种技术的实施、健全政策引导和市场监管的机制、创建互联网+营销平台等措施,从而有效推动吉林省人参产业的高质量发展。

关键词：吉林省长白山人参发展现状精深加工

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乳腺癌患者内分泌治疗相关骨关节疼痛发展轨迹及护理启示

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中华护理杂志 2024年第14期59卷 1732-1738页

作者：王莉杰彭思意陈婕君魏涛刘佳惠胡美红李旭英湖南省肿瘤医院护理部长沙市410013 湖南省肿瘤医院早期临床研究中心长沙市410013 湖南省肿瘤医院乳腺内科长沙市410013 湖南省肿瘤医院麻醉复苏室长沙市410013

目的探讨乳腺癌患者内分泌治疗相关骨关节疼痛发展轨迹的潜在类别及影响因素,为实施针对性的健康教育提供依据。方法采用便利抽样法,选取2022年1月—7月在湖南省某三级甲等肿瘤专科医院乳腺内科住院或门诊就诊的乳腺癌患者481例作为调... 详细信息

目的探讨乳腺癌患者内分泌治疗相关骨关节疼痛发展轨迹的潜在类别及影响因素,为实施针对性的健康教育提供依据。方法采用便利抽样法,选取2022年1月—7月在湖南省某三级甲等肿瘤专科医院乳腺内科住院或门诊就诊的乳腺癌患者481例作为调查对象。采用一般资料调查表、乳腺癌内分泌治疗患者症状评估量表、焦虑自评量表在患者治疗前1周内进行基线调查,采用乳腺癌内分泌治疗患者症状评估量表在患者治疗后3、6、9个月调查患者骨关节疼痛水平,采用增长混合模型、单因素分析和多元Logistic回归分析数据。结果共418例(86.90%)乳腺癌患者完成随访,发生骨关节疼痛235例(56.22%)。识别出骨关节疼痛发展轨迹的3个潜在类别,分别为高水平-缓慢上升组(11.48%)、低水平-缓慢上升组(44.74%)、无症状组(43.78%)。多元Logistic回归分析结果显示,焦虑、关节疾病史、每天睡眠时长、居住地、家庭月收入、每周运动次数是乳腺癌患者内分泌治疗相关骨关节疼痛水平发展轨迹潜在类别的影响因素(P<0.05)。结论乳腺癌患者内分泌治疗相关骨关节疼痛水平呈现不同的变化轨迹,临床医护人员应重视存在焦虑、关节疾病史、睡眠时间短、家庭经济状况差、居住在市区及每周运动次数少的患者疼痛水平的评估和干预。

关键词：乳腺肿瘤内分泌治疗芳香化酶抑制剂骨关节疼痛发展轨迹增长混合模型护理

How Does the Regional Comprehensive Economic Partnership Affect the Restructuring of Global Value Chains?

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China & World Economy 2023年第3期31卷 140-172页

作者： Zijie Fan siyi peng Wenjie Hu School of Economics&Trade Hunan UniversityChina.

This paper quantifies the way in which the Regional Comprehensive Economic Partnership(RCEP)afects the restructuring of global value chains(GVCs).It incorporates an inputoutput structure into a general equilibrium model,highlighting important differences between intermediates and final *** tarif reduction schedules for the RCEP agreement and Asian Development Bank Multi-Region Input-Output database,it evaluates the impact of the RCEP's tariff cuts on vertical specialization and the GVC position index of *** shows that the RCEP significantly increased vertical specialization and the weighted average number of stages for members for primary factors of production and final consumption,which led to more complex and longer production *** was mainly due to the trade creation in intermediates imported from member countries and those outside *** is an important finding,distinct from traditional trade models without aninput-output structure.

关键词： counterfactuals GVC position index RCEP vertical specialization

镁合金倾斜薄壁电弧熔丝增材制造工艺与力学性能研究

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材料工程 2024年第7期52卷 57-70页

作者：郑元翾韩启飞陈斌凌郭跃岭谭醴李星辰彭司弋刘长猛北京理工大学机械与车辆学院北京100081

电弧增材制造是一种以金属丝材为填充材料,以电弧作为热源的新型制造技术,易于制造大型复杂零件。通过往复单向路径实验,发现单向路径制造的斜壁有更好的形貌,飞溅少且表面光滑,并在有限元软件中建立了往复、单向制造路径仿真模型并求解... 详细信息

电弧增材制造是一种以金属丝材为填充材料,以电弧作为热源的新型制造技术,易于制造大型复杂零件。通过往复单向路径实验,发现单向路径制造的斜壁有更好的形貌,飞溅少且表面光滑,并在有限元软件中建立了往复、单向制造路径仿真模型并求解,仿真得到单向路径沉积温度267.4℃,沉积热应力357.4 MPa,往复路径沉积温度307.0℃,沉积热应力420.4 MPa,发现单向路径的热积累和热应力更低;以单向制造路径,采用电弧增材制造技术制备AM11,AM12,AM21三种不同斜率的斜壁样件,研究其组织和力学性能。结果表明:AM11,AM12,AM21的晶粒尺寸分别为35,39,42μm;AM21薄壁晶粒中析出相β-Mg17Al12比另外两种样品多且分布均匀、拉伸断口的韧窝更大且更多;AM21与AM11显微硬度在81.5HV左右,均高于AM12的73.1HV;且AM21的斜壁样件的水平、竖直方向抗拉强度为255.7,224.4 MPa,屈服强度为103.8,96.0 MPa,伸长率达到13.1%,8.2%,抗拉强度与伸长率均大于AM11和AM12,但屈服强度接近。AM21斜率薄壁具有更好的强度和塑性,验证了镁合金电弧增材制造的斜壁越接近垂直,其强度、塑性等力学性能越好。

关键词：电弧增材制造 AZ91D镁合金薄壁件微观组织力学性能断口组织

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新生儿PICC相关性血栓预防与管理的证据总结

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中国护理管理 2024年第3期24卷 418-424页

作者：方运霞刘佳惠林琴彭思意魏涛袁忠王童语李旭英湖南中医药大学护理学院长沙市410208 湖南省肿瘤医院乳腺内科湖南省肿瘤医院血管通道中心湖南省肿瘤医院早期临床中心湖南省肿瘤医院麻醉科湖南省肿瘤医院护理部

目的:总结新生儿经外周静脉置入中心静脉导管(PICC)相关性血栓预防与管理的证据,为临床医护人员提供循证依据。方法:系统检索国内外临床决策网站、指南网站、专业协会网站、循证文献资源库及原始文献数据库,检索时限为建库至2023年2月... 详细信息

目的:总结新生儿经外周静脉置入中心静脉导管(PICC)相关性血栓预防与管理的证据,为临床医护人员提供循证依据。方法:系统检索国内外临床决策网站、指南网站、专业协会网站、循证文献资源库及原始文献数据库,检索时限为建库至2023年2月。对纳入的文献进行方法学质量评价,结合专业判断、临床情境提取证据并进行汇总。结果:共纳入14篇文献,其中临床决策2篇,指南6篇,系统评价4篇,队列研究2篇。从风险评估、导管置入、导管维护、血栓诊断、血栓治疗、拔管等6个方面共汇总了31条证据。结论:本研究总结了新生儿PICC相关性血栓预防及管理的证据。医护人员可结合文化背景、临床情境选择证据,制定科学的血栓预防及管理方案,提升护理质量。

关键词：导管相关性血栓经外周静脉置入中心静脉导管新生儿证据总结

基于多学科全流程管理的抗肿瘤药物Ⅰ期临床试验受试者管理模式探讨

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肿瘤药学 2024年第2期14卷 222-228页

作者：赵姣李金花陈勇彭思意雷静肖羽乔湖南中医药大学护理学院湖南长沙410208 湖南省肿瘤医院早期临床研究中心湖南长沙410013 湖南省肿瘤医院护理部湖南长沙410013

目的基于多学科合作的全流程管理,探讨抗肿瘤药物Ⅰ期临床试验受试者管理模式并分析应用效果,为抗肿瘤药物Ⅰ期临床试验受试者的规范管理提供参考依据。方法建立多学科合作的全流程管理模式,对接受抗肿瘤药物Ⅰ期临床试验的受试者提供... 详细信息

目的基于多学科合作的全流程管理,探讨抗肿瘤药物Ⅰ期临床试验受试者管理模式并分析应用效果,为抗肿瘤药物Ⅰ期临床试验受试者的规范管理提供参考依据。方法建立多学科合作的全流程管理模式,对接受抗肿瘤药物Ⅰ期临床试验的受试者提供从入院前至出院后的全流程管理。结果实行多学科合作的全流程管理后,受试者临床试验方案违背发生率从10.3%降低到2.1%,受试者护理不良事件发生率从8.5%降低到1.1%,患者家属满意度得到提高。结论实施多学科全流程管理模式可有效降低抗肿瘤药物Ⅰ期临床试验方案违背率,并提高肿瘤受试者满意度和随访依从性,值得临床推广应用。

关键词：全流程管理多学科肿瘤受试者管理模式

Leaf area increases with species richness in young experimental stands of subtropical trees

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Journal of Plant Ecology 2017年第1期10卷 128-135页

作者： siyi peng Bernhard Schmid Josephine Haase Pascal A.Niklaus Institute of Evolutionary Biology and Environmental Studies University of ZürichWinterthurerstrasse 190CH-8057 ZürichSwitzerland

Aims Most biodiversity-ecosystem functioning research has been carried out in grassland ecosystems,and little is known about whether forest ecosystems,in particular outside the temperate zone,respond ***,we tested whether productivity,assessed as leaf area index(LAI),increases with species richness in young experimental stands of subtropical trees,whether this response is similar for early-season leaf area(which is dominated by evergreens)and seasonal leaf area increase(which is dominated by deciduous species),and whether responses saturate at high species *** We used a planted tree biodiversity experiment in south-east China to test our *** was determined three times by digital hemispheric photography in 144 plots that had been planted with 400 trees each,forming communities with 1,2,4,8 or 16 tree *** Findings LAI increased significantly with tree species richness in the fifth year of stand ***,but weaker,statistically non-significant trends were observed 1 year *** did not observe leaf area overyielding and the presence of particularly productive and unproductive species explained large amounts of variation in leaf area,suggesting that selection-type effects contributed substantially to the biodiversity effects we found in this early phase of stand *** sizes were moderate to large and comparable in magnitude to the ones reported for grassland ***(and tropical)forests harbor substantial parts of global net primary production and are critical for the Earth’s carbon and hydrological cycle,and our results suggest that tree diversity critically supports these ecosystem services.

关键词： BEF-China digital hemispheric photography field biodiversity experiment overyielding subtropical forest

Population genomic analysis reveals key genetic variations and the driving force for embryonic callus induction capability in maize

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Journal of Integrative Agriculture 2024年第7期23卷 2178-2195页

作者： peng Liu Langlang Ma siyi Jian Yao He Guangsheng Yuan Fei Ge Zhong Chen Chaoying Zou Guangtang Pan Thomas Lübberstedt Yaou Shen State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China/Maize Research Institute Sichuan Agricultural UniversityChengdu 611130China Department of Agronomy Iowa State UniversityAmesIA 50011USA

Genetic transformation has been an effective technology for improving the agronomic traits of ***,it is highly reliant on the use of embryonic callus(EC)and shows a serious genotype *** this study,we performed genomic sequencing for 80 core maize germplasms and constructed a high-density genomic variation map using our newly developed pipeline(MQ2Gpipe).Based on the induction rate of EC(REC),these inbred lines were categorized into three *** low-REC germplasms displayed more abundant genetic diversity than the high-REC *** integrating a genome-wide selective signature screen and region-based association analysis,we revealed 95.23 Mb of selective regions and 43 REC-associated *** variants had phenotypic variance explained values ranging between 21.46 and 49.46%.In total,103 candidate genes were identified within the linkage disequilibrium regions of these REC-associated *** genes mainly participate in regulation of the cell cycle,regulation of cytokinesis,and other functions,among which MYB15 and EMB2745 were located within the previously reported QTL for EC *** leaf area-associated variants with large effects were closely linked to several REC-related loci,implying a potential synergistic selection of REC and leaf size during modern maize breeding.

关键词： maize genetic transformation embryonic callus selective signal association analysis

Trade-offs between the accumulation of cuticular wax and jasmonic acid-mediated herbivory resistance in maize

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Journal of Integrative Plant Biology 2024年第1期66卷 143-159页

作者： Jiong Liu Lu Li Zhilong Xiong Christelle AMRobert Baozhu Li Shan He Wenjie Chen Jiasheng Bi Guanqing Zhai siyi Guo Hui Zhang Jieping Li Shutang Zhou Xi Zhang Chun‐peng Song School of Life Sciences Henan UniversityKaifeng 475004China State Key Laboratory of Crop Stress Adaptation and Improvement Henan UniversityKaifeng 475004China State Key Laboratory of Cotton Bio‐Breeding and Integrated Utilization Henan UniversityKaifeng 475004China Sanya Institute of Henan University Sanya 572025China Institute of Plant Sciences University of BernBern 3013Switzerland

Plants have evolved complex physical and chemical defense systems that allow them to withstand herbivory *** of a complex mixture of very-long-chain fatty acids(VLCFAs)and their derivatives,cuticular wax constitutes the first physical line of defense against ***,we report the function of Glossy 8(ZmGL8),which encodes a 3-ketoacyl reductase belonging to the fatty acid elongase complex,in orchestrating wax production and jasmonic acid(JA)-mediated defenses against herbivores in maize(Zea mays).The mutation of GL8 enhanced chemical defenses by activating the JA-dependent *** observed a trade-off between wax accumulation and JA levels across maize glossy mutants and 24 globally collected maize inbred *** addition,we demonstrated that mutants defective in cuticular wax biosynthesis in Arabidopsis thaliana and maize exhibit enhanced chemical *** transcriptomic and lipidomic analyses indicated that the gl8 mutant confers chemical resistance to herbivores by remodeling VLCFA-related lipid metabolism and subsequent JA biosynthesis and *** results suggest that VLCFA-related lipid metabolism has a critical role in regulating the trade-offs between cuticular wax and JA-mediated chemical defenses.

关键词： cuticular wax fall armyworm herbivore resistance jasmonic acid maize plant-herbivore interactions