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Achieving high-strain-rate and low-temperature superplasticity in an ECAP-processed Mg-Y-Er-Zn alloy via Ag addition

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Journal of Magnesium and Alloys 2023年第10期11卷 3765-3778页

作者： haoran wu Jinghua Jiang Zhenquan Yang Mengjia Li He Huang Ningfei Ge Aibin Ma Huan Liu College of Mechanicals and Materials Hohai UniversityNanjing 210000China Suqian Institute Hohai UniversitySuqian 223800China Center of Advanced Analysis and Gene Sequencing Zhengzhou UniversityZhengzhou 450003China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450003China Faculty of Georesources and Materials Engineering RWTH Aachen University52062Germany

The effect of adding a small amount of Ag on the microstructure evolution and superplastic properties of Mg-Y-Er-Zn(WEZ612) alloys was systematically *** basal texture of the refined WEZ612 alloy produced by equal channel angular pressing was altered to a non-basal structure upon the addition of *** addition also refined the grain size and promoted the formation of a large number of nano-14H-long period stacking ordered *** high-resolution transmission electron microscopy,many nano-precipitated phases were detected on the basal plane of the Mg-Y-Er-Zn-1Ag(WEZ612-1Ag) alloy,The nano-precipitated phases on the basal plane improved the thermal stability of the alloy,lowered the deformation activation energy(Q),and improved the stress sensitivity index(m).At 523 K with a strain rate of 10^(-2) s^(-1),the Q value of WEZ612 was higher than that of WEZ612-1Ag(299.14 and 128.5 kJ mol^(-1),respectively).In contrast,the m value of the WEZ612 alloy(0.16) was lower than that of the WEZ612-1Ag alloy(0.46).At 623 K with a tensile rate of 10^(-2) s^(-1),the WEZ612 and WEZ612-1Ag alloys were elongated by 182% and 495%,respectively,with the latter exhibiting high-strain-rate and low-temperature *** improved superplasticity of the WEZ612-1Ag alloy is attributed to the nano-precipitated phases,which effectively limit the cavity extension during superplastic deformation.

关键词： Magnesium alloys Long period stacking ordered(LPSO) Ag addition Nano-precipitates Superplastic behavior

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腹腔镜脾部分切除术在外伤性脾破裂中的应用分析

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中华肝胆外科杂志 2024年第7期30卷 544-546页

作者：吴浩然卜浩柳胜君冀定国刘驳强侯政叶劲松周后平中南大学湘雅医学院附属常德医院普外一科常德415000

探讨腹腔镜脾部分切除术治疗外伤性脾破裂的临床效果。回顾性分析2019年1月至2023年9月在中南大学湘雅医学院附属常德医院就诊的外伤性脾破裂行腹腔镜脾部分切除术的5例患者临床资料,其中男性4例,女性1例,年龄(47.0±14.3)岁。分析5例... 详细信息

探讨腹腔镜脾部分切除术治疗外伤性脾破裂的临床效果。回顾性分析2019年1月至2023年9月在中南大学湘雅医学院附属常德医院就诊的外伤性脾破裂行腹腔镜脾部分切除术的5例患者临床资料,其中男性4例,女性1例,年龄(47.0±14.3)岁。分析5例患者手术时间、术中出血量、术后住院时间、术后首次排气时间、术后并发症等。脾损伤分级(4级法):Ⅱ级4例,Ⅲ级1例。5例患者均顺利完成腹腔镜脾部分切除术,无围手术期死亡。5例患者手术时间为(182.2±76.4)min,术中出血量为(290.0±52.3)ml,术后首次排气时间为(2.8±0.6)d,术后住院时间为(7.0±3.2)d。无术后出血、胰瘘、腹腔感染等并发症。5例患者出院后随访12个月,1例患者出现血小板增多,峰值为736×109/L,予口服双嘧达莫至恢复正常上限,余患者血小板波动在200~400×10^(9)/L,CT复查均未见静脉血栓及脾梗死情况。腹腔镜脾部分切除术治疗外伤性脾破裂是安全可行的。

关键词：外伤性脾破裂脾部分切除术血小板增多正常上限术后住院时间出院后随访脾梗死胰瘘

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鄂尔多斯区内毛乌素沙地1987—2022年植被覆盖时空演变

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现代地质 2024年第3期38卷 674-682页

作者：尹永会孔祥生吴浩然刘玖芬王凯陈熹卓王寒冰张晶王小天中国地质调查局烟台海岸带地质调查中心山东烟台264000 自然资源要素耦合过程与效应重点实验室北京100055 内蒙古鄂尔多斯自然资源综合利用野外科学观测研究站内蒙古鄂尔多斯017000 鲁东大学山东烟台264025 中国地质调查局自然资源综合调查指挥中心北京100055

毛乌素沙地作为我国四大沙地之一,是沙漠化和防沙治沙研究的重点区域。遥感已成为地表时空分析的重要手段,但当前毛乌素沙地区域基于长时间序列、中高分辨率影像研究不足。利用Google Earth Engine云平台,结合Landsat-5 TM、Landsat-7 E... 详细信息

毛乌素沙地作为我国四大沙地之一,是沙漠化和防沙治沙研究的重点区域。遥感已成为地表时空分析的重要手段,但当前毛乌素沙地区域基于长时间序列、中高分辨率影像研究不足。利用Google Earth Engine云平台,结合Landsat-5 TM、Landsat-7 ETM+和Landsat-8 OLI长时序归一化植被指数,采用Sen+Mann-Kendall方法探究鄂尔多斯地区毛乌素沙地1987—2022年近35年植被覆盖时空演变,并结合气象数据进行驱动力分析。结果表明:(1)鄂尔多斯地区毛乌素沙地植被不断改善,植被覆盖整体呈增长趋势,NDVI变化量为+0.0028 a^(-1),NDVI增势呈先缓-后急-再缓的趋于平稳的阶段式变化特征;(2)植被改善的区域面积占比达98%以上,退化区域面积占比小于0.5%,空间上植被覆盖改善东部优于西部,南北部优于中部;(3)植被覆盖变化与自然水热变化无显著相关性。

关键词：植被覆盖趋势分析谷歌地球引擎毛乌素沙地

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5G Oriented Exponential Effective Signal to Interference plus Noise Ratio Mapping Algorithm Based on Channel Classification

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Journal of Donghua University(English Edition) 2018年第2期35卷 160-162页

作者： wu haoran YE Jianfang College of Information Science and Technology Donghua University Shanghai 201620 China

In the future the fifth generation( 5 G) communication systems,channel models may be very complicated and it is difficult to calculate equivalent signal to interference plus noise ratio( SINR)of a random fading channel. Therefore,methods for the calculation of equivalent SINR of a random fading channel are very *** this paper,an enhanced algorithm on the exponential effective SINR mapping( EESM) model for random fading channels was proposed. First, the optimal adjustment parameters of typical channel fading models including extended pedestrian A( EPA)model,extended vehicular A( EVA) model and extended typical urban( ETU) model were obtained by simulation. Then the proposed solution was used to actualize channel classification according to the maximum multipath delay and the average power of the random channel. The solution can determine the typical channel closest to random channel for obtaining the optimal adjustment value of EESM. The evaluation results indicate that the proposed one can improve the whole system throughput significantly and meanwhile the accuracy of the link prediction algorithm is also guaranteed.

关键词： the fifth generation (5G) signal to interference plus noiseratio (SINR) exponential effective SINR mapping (EESM) channel classification

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Geochronology and Geochemistry of Early Cretaceous Granitic Plutons in the Xing’an Massif, Great Xing’an Range, NE China: Petrogenesis and Tectonic Implications

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Acta Geologica Sinica(English Edition) 2019年第5期93卷 1500-1521页

作者： DONG Yu GE Wenchun TIAN Dexin JI Zheng YANG Hao BI Junhui wu haoran HAO Yujie College of Earth Sciences Jilin UniversityChangchun 130061China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Natural ResourcesChangchun 130061China Nonferrous Metals Geological Exploration Bureau of Zhejiang Province ShaoxingZhejiang 312000China Tianjin Center China Geological SurveyTianjin 300170China

In this study, we present zircon U-Pb ages, whole-rock geochemical data and Hf isotopic compositions for the Meiguifeng and Arxan plutons in Xing’an Massif, Great Xing’an Range, which can provide important information in deciphering both Mesozoic magmatism and tectonic evolution of NE China. The zircon U-Pb dating results indicate that alkali feldspar granite from Meiguifeng pluton was emplaced at ~145 to 137 Ma, and granite porphyry of Arxan pluton was formed at ~129 Ma. The Meiguifeng and Arxan plutons have similar geochemical features, which are characterized by high silica, total alkalis, differentiation index, with low P2O5, CaO, MgO, TFe2O3 contents. They belong to high-K calc-alkaline series, and show weakly peraluminous characteristics. The Meiguifeng and Arxan plutons are both enriched in LREEs and LILEs(e.g., Rb, Th, U and K), and depleted in HREEs and HFSEs(e.g., Nb, Ta and Ti). Combined with the petrological and geochemical features, the Meiguifeng and Arxan plutons show highly fractionated I-type granite affinity. Moreover, the Meiguifeng and Arxan plutons may share a common or similar magma source, and they were probably generated by partial melting of Neoproterozoic high-K basaltic crust. Meanwhile, plagioclase, K-feldspar, biotite, apatite, monazite, allanite and Ti-bearing phases fractionated from the magma during formation of Meiguifeng and Arxan plutons. Combined with spatial distribution and temporal evolution, we assume that the generation of Early Cretaceous Meiguifeng and Arxan plutons in Great Xing’an Range was closely related to the break-off of Mudanjiang oceanic plate. Furthermore, the Mudanjiang Ocean was probably a branch of Paleo-Pacific Ocean.

关键词： geochemistry geochronology Early Cretaceous highly fractionated I-type granite Great Xing'an Range

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经皮内镜下可撑开融合器用于腰椎后路椎间融合的疗效及影像学分析

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骨科临床与研究杂志 2024年第3期9卷 151-157页

作者：李亚坤何李明崔浩武浩然冯皓宇山西医学科学院山西医科大学第三医院山西白求恩医院脊柱外科太原030032

目的探讨经皮内镜腰椎后路椎间融合术(PE-PLIF)置入可撑开钛合金材质融合器进行椎间融合治疗腰椎退行性疾病的临床疗效。方法回顾性分析2019年5月至2021年7月于山西医科大学第三医院脊柱外科行PE-PLIF治疗72例腰椎退行性疾病患者的资料... 详细信息

目的探讨经皮内镜腰椎后路椎间融合术(PE-PLIF)置入可撑开钛合金材质融合器进行椎间融合治疗腰椎退行性疾病的临床疗效。方法回顾性分析2019年5月至2021年7月于山西医科大学第三医院脊柱外科行PE-PLIF治疗72例腰椎退行性疾病患者的资料;其中术中置入可撑开钛合金材质融合器(可撑开组)39例、静态PEEK融合器(静态组)33例。随访2年以上。比较两组患者手术前后的临床疗效评价指标和影像学数据,并最终通过Bridwell标准椎间融合分级及融合器沉降程度Marchi分级,计算腰椎椎间融合器融合率及沉降率。结果可撑开组与静态组的患者一般资料差异无统计意义(P>0.05)。两组手术时间、术中失血量、术后引流量、术后住院时间以及术后并发症等围手术期指标差异无统计学意义(P>0.05)。两组术后各个时间段的腰痛、腿痛视觉模拟评分(VAS)、Oswestry功能障碍指数(ODI)较术前明显改善(P0.05)。在末次随访的影像学指标中,两组的骨盆入射角较术前差异均无统计学意义(均P>0.05)。两组术后椎间隙的高度、椎管面积和腰椎前凸角等相关影像学指标均较术前明显改善(P0.05)。可撑开组融合器的椎间融合率(94.9%)与静态组融合率(93.9%)差异无统计学意义(χ^(2)=0.030,P=0.863),可撑开组融合器沉降率(17.9%)与静态组沉降率(18.2%)差异无统计学意义(χ^(2)=0.001,P=0.980)。结论PE-PLIF置入可撑开融合器能够达到与传统静态融合器同样的治疗效果,有助于减轻患者临床症状以及恢复脊柱的生理曲度,为未来临床的治疗提供参考意见。

关键词：内窥镜脊柱融合术腰椎

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中国农作物种质资源保护的研究进展

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杂交水稻 2024年第1期39卷 11-16页

作者：黄艳玲张从合严志王慧方玉周桂香吴浩然周乾李侠芳陈思安徽荃银高科种业股份有限公司/农业农村部杂交稻新品种创制重点实验室安徽合肥230088 上海中科荃银分子育种技术有限公司上海200233

农作物种质资源是保障国家粮食安全的战略性资源,其数量、质量以及鉴定和挖掘的深度和广度直接影响到国家粮食安全的可持续性。概述了中国主要农作物种质资源的保存、鉴定和利用现状,分析了农作物种质资源保护工作中存在的问题,并提出... 详细信息

农作物种质资源是保障国家粮食安全的战略性资源,其数量、质量以及鉴定和挖掘的深度和广度直接影响到国家粮食安全的可持续性。概述了中国主要农作物种质资源的保存、鉴定和利用现状,分析了农作物种质资源保护工作中存在的问题,并提出相关对策和建议,以为科技工作者在农作物种质资源保护工作中提供参考。

关键词：农作物种质资源遗传多样性基因组学深度鉴定基因芯片

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Development of sustainable and efficient recycling technology for spent Li-ion batteries: Traditional and transformation go hand in hand

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Green Energy & Environment 2024年第5期9卷 802-830页

作者： Zejian Liu Gongqi Liu Leilei Cheng Jing Gu haoran Yuan Yong Chen Yufeng wu Guangzhou Institute of Energy Conversion Chinese Academy of Sciences(CAS)Guangzhou510640China School of Engineering Science University of Science and Technology of ChinaHefei230026China Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development Guangzhou510640China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing100124China

Clean and efﬁcient recycling of spent lithium-ion batteries(LIBs)has become an urgent need to promote sustainable and rapid development of human ***,we provide a critical and comprehensive overview of the various technologies for recycling spent LIBs,starting with lithium-ion power *** research on raw material collection,metallurgical recovery,separation and puriﬁcation is highlighted,particularly in terms of all aspects of economic efﬁciency,energy consumption,technology transformation and policy *** and pathways for transformative full-component recovery of spent LIBs are explored,revealing a clean and efﬁcient closed-loop recovery *** methods are proposed for future recycling technologies,with a focus on how future research directions can be ***,based on life-cycle assessment,the challenges of future recycling are revealed from the LIBs supply chain and stability of the supply chain of the new energy battery industry to provide an outlook on clean and efﬁcient short process recycling *** work is designed to support the sustainable development of the new energy power industry,to help meet the needs of global decarbonization strategies and to respond to the major needs of industrialized recycling.

关键词： Spent LIBs Transformative recycling LCA analysis Policy guidance High value utilization

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考虑土体耦合作用的油井套管地震响应分析

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低温建筑技术 2024年第1期46卷 28-32页

作者：刘汉辰刘洋何锦涛范琳琳吴浩然西安工程大学城市规划与市政工程学院西安710048

为研究油井套管的地震响应,文中以某油井工程为背景,依据欧拉伯努利弹性地基梁建立了考虑土体耦合作用的套管横向振动模型。采用有限元软件Midas/GTS建立了油井套管-土体动力相互作用的数值模型。通过非线性时程分析,得到油井套管在汶... 详细信息

为研究油井套管的地震响应,文中以某油井工程为背景,依据欧拉伯努利弹性地基梁建立了考虑土体耦合作用的套管横向振动模型。采用有限元软件Midas/GTS建立了油井套管-土体动力相互作用的数值模型。通过非线性时程分析,得到油井套管在汶川地震波、Kobe地震波、Northridge地震波、人工地震波、El-Centro地震波下的位移、加速度响应。结果表明在地震作用下,油井套管的位移、加速度响应随着埋深的增加而减弱;与地面构筑物相比较,油井套管对地震波的响应有抑制作用;油井套管应力最大的位置出现在地面0m处和露出地面部分,并且这个位置是套管结构的最不利位置。研究结论可为地震区油井套管的抗震设计提供参考。

关键词：油井套管结构地震动力响应非线性时程分析

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Modulating vectored non-covalent interactions for layered assembly with engineerable properties

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Bio-Design and Manufacturing 2022年第3期5卷 529-539页

作者： Jiahao Zhang Sarah Guerin haoran wu Bin Xue Yi Cao Syed A.M.Tofail Yancheng Wang Damien Thompson Wei Wang Kai Tao Deqing Mei Ehud Gazit State Key Laboratory of Fluid Power and Mechatronic Systems School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China Future Science Research Institute Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 311200China Department of Physics and Bernal Institute University of LimerickCastletroyCo.LimerickLimerick V94T9PXIreland National Laboratory of Solid State Microstructure Department of PhysicsNanjing UniversityNanjing 210093China Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province School of Mechanical EngineeringZhejiang UniversityHangzhou 310027China School of Molecular Cell Biology and Biotechnology George S.Wise Faculty of Life SciencesTel Aviv University6997801 Tel AvivIsrael Department of Materials Science and Engineering Iby and Aladar Fleischman Faculty of EngineeringTel Aviv University6997801 Tel AvivIsrael

Vectored non-covalent interactions—mainly hydrogen bonding and aromatic interactions—extensively contribute to(bio)-organic self-assembling processes and significantly impact the physicochemical properties of the associated ***,vectored non-covalent interaction-driven assembly occursmainly along one-dimensional(1D)or three-dimensional(3D)directions,and a two-dimensional(2D)orientation,especially that of multilayered,graphene-like assembly,has been reported *** this present research,by introducing amino,hydroxyl,and phenyl moieties to the triazine skeleton,supramolecular layered assembly is achieved by vectored non-covalent *** planar hydrogen bonding network results in high stability,with a thermal sustainability of up to about 330°C and a Young’s modulus of up to about 40 *** introducing wrinkles by biased hydrogen bonding or aromatic interactions to disturb the planar organization,the stability ***,the intertwined aromatic interactions prompt a red edge excitation shift effect inside the assemblies,inducing broad-spectrum fluorescence covering nearly the entire visible light region(400–650 nm).We show that bionic,superhydrophobic,pillar-like arrays with contact angles of up to about 170°can be engineered by aromatic interactions using a physical vapor deposition approach,which cannot be realized through hydrogen *** findings show the feasibility of 2D assembly with engineerable properties by modulating vectored non-covalent interactions.

关键词： Vectored non-covalent interactions Layered assembly Supramolecular graphene Engineerable properties Physical vapor deposition

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