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Strengthening effect of prefabrication(10-12) tensile twinning on AZ80+0.4%Ce magnesium alloy and inhibition mechanism of discontinuous precipitation

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Journal of Magnesium and Alloys 2024年第5期12卷 1918-1930页

作者： Zhen Wang Xi Zhao Zhimin zhang Yaojin Wu Kai Chen Xianwei Ren Dengkui Wang Wei Wang School of Mechanical and Electrical Engineering North University of China Engineering Technology Research Center for Integrated Precision Forming of Shanxi Province North University of China

This paper provided an effective method to further improve the mechanical properties of the AZ80+0.4%Ce magnesium alloy wheel spoke. The effect of high strength and ductility was obtained with a yield strength of 295.36 MPa, an elongation of 10%, by the combination of pre-deformation(7% deformation) and two-stage aging treatment(120 ℃/9 h + 175 ℃/24 h). The evolution of the microstructure and properties of the alloy was explored under the coupling conditions of different pre-deformation degrees and multi-stage aging. The results show that, pre-deformation introduced a large number of(■) tensile twinning and dislocations, which greatly promoted the probability of continuous precipitates(CPs) appearing. On the contrary, the discontinuous precipitates(DPs) were limited by the vertical and horizontal twin structure. As a result, the pre-nucleation method of two-stage aging increased the proportion of CPs by 34%-38%. Owing to the DPs was effectively suppressed, the alloy's yield strength has been greatly improved. Besides, under multi-stage aging, the twin boundaries induce protruding nucleation to form static recrystallization by hindering the migration of dislocations, and the matrix swallows the twins, then the texture gradually tilts from the two poles to the basal plane. As an important supplement, the grain refinement and oblique texture promoted the improvement of the yield strength of the component.

关键词： Magnesium alloy Pre-deformed Two-stage aging Tensile twinning Continuous precipitates Texture

Building and sharing medical cohorts for research

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The Innovation 2024年第3期5卷 23-24页

作者： Guo-Bo Chen Siyang Liu Lei zhang Tao Huang Xiaohua Tang Yixue Li Changqing Zeng Department of Genetic and Genomic Medicine Zhejiang Provincial People’s HospitalAffiliated People’s Hospital of Hangzhou Medical CollegeHangzhou 310014China Ningbo Institute of Life and Health Industry University of Chinese Academy of SciencesNingbo 315000China School of Public Health(Shenzhen) Shenzhen Campus of Sun Yat-sen UniversityShenzhen 518017China China National GeneBank Shenzhen 518116China Shanghai Institute of Nutrition and Health Chinese Academy of SciencesShanghai 200031China Wenzhou Central Hospital Dingli Clinical Medical School of Wenzhou Medical UniversityWenzhou 325000China Guangzhou Laboratory Guangzhou 510320China Henan Academy of Sciences Zhengzhou 450046China

Cohort studies are costly and time consuming.They require not only laboratory equipment and assays but also collaboration from participants and health agencies.Due to cost constraints,they are often confined to a specific population.Nevertheless,they play a crucial role in providing fundamental insights for medical advancements,shedding light on the origins of diseases,and acting in socioeconomic influence in policy making.

关键词： consuming constraints insight

Pyridine-regulated Sb@InSbS3 ultrafine nanoplates as high-capacity and long-cycle anodes for sodium-ion batteries

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Rare Metals 2024年第5期43卷 2080-2092页

作者： Jia-Ying Ren Xiang-Lin Yu Chang-Miao Chen Xin-Yu Hu Ting Yang Ming zhang College of Materials Science and Engineering and College of Science Central South University of Forestry and Technology College of Semiconductors (College of Integrated Circuits) Changsha Semiconductor Technology and Application Innovation Research InstituteHunan University

Sb-based materials exhibit considerable potential for sodium-ion storage owing to their high theoretica capacities.However,the bulk properties of Sb-based materials always result in poor cycling and rate performances.To overcome these issues,pyridine-regulated Sb@InSbS3ultrafine nanoplates loaded on reduced graphene oxides （Sb@InSbS3@rGO） were designed and synthesized.During the synthesis process,pyridine was initially adopted to coordinate with In3+,and uniformly dispersed In2S3ultrafine nanoplates on reduced graphene oxide were generated after sulfidation.Next,partial In3+was exchanged with Sb3+,and Sb@InSbS3@rGO was obtained by using the subsequent annealing method.The unique structure of Sb@InSbS3@rGO effectively shortened the transfer path of sodium ions and electrons and provided a high pseudocapacitance.As the anode in sodium-ion batteries,the Sb@InSbS3@rGO electrode demonstrated a significantly higher reversible capacity better stability (445 m Ah·g-1at 0.1 A·g-1after 200 cycles and 212 mAh·g-1at 2 A·g-1after 1200 cycles),and superior rate (210 mAh·g-1at 6.4 A·g-1) than the electrode without pyridine (355 mAh·g-1at 0.1 A·g-1after 55 cycles and 109 mAh·g-1at 2 A·g-1after 770 cycles)Furthermore,full cells were assembled by using the Sb@InSbS3@rGO as anode and Na3V2（PO4）3as cathode which demonstrated good cycling and rate performances and exhibited promising application prospects.These results indicate that adjusting the microstructure of electrode materials through coordination balance is A·good strategy for obtaining high-capacity,high-rate,and longcycle sodium storage performances.

关键词： Sodium-ion battery Sb-based anode material Pyridine coordination Reduced size nanostructure Half/full cell

Multi-Scale Binocular Stereo Matching Based on Semantic Association

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Chinese Journal of Electronics 2024年第4期33卷 1010-1022页

作者： Jin ZHENG Botao JIANG Wei PENG Qiaohui zhang State Key Laboratory of Virtual Reality Techonology and Systems Beihang University School of Computer Science and Engineering Beihang University

Aiming at the low accuracy of existing binocular stereo matching and depth estimation methods, this paper proposes a multi-scale binocular stereo matching network based on semantic association. A semantic association module is designed to construct the contextual semantic association relationship among the pixels through semantic category and attention mechanism. The disparity of those regions where the disparity is easily estimated can be used to assist the disparity estimation of relatively difficult regions, so as to improve the accuracy of disparity estimation of the whole image. Simultaneously, a multi-scale cost volume computation module is proposed. Unlike the existing methods, which use a single cost volume, the proposed multi-scale cost volume computation module designs multiple cost volumes for features of different scales. The semantic association feature and multi-scale cost volume are aggregated, which fuses the high-level semantic information and the low-level local detailed information to enhance the feature representation for accurate stereo matching. We demonstrate the effectiveness of the proposed solutions on the KITTI2015 binocular stereo matching dataset, and our model achieves comparable or higher matching performance, compared to other seven classic binocular stereo matching algorithms.

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Agriculture green development in China: insights and advances

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Frontiers of Agricultural Science and Engineering 2024年第1期11卷 5-19,I0005页

作者： Jianbo SHEN Qichao ZHU Yong HOU Wen-Feng CONG Wen XU Jiuliang XU Zhichao AN Xiaoqiang JIAO Kai zhang Tianxiang YU Lin MA Oene OENEMA William J.DAVIES Fusuo zhang State Key Laboratory of Nutrient Use and Management College of Resources and Environmental SciencesNational Academy of Agriculture Green DevelopmentChina Agricultural UniversityBeijing 100193China Key Laboratory of Agricultural Water Resources Center for Agricultural Resources ResearchInstitute of Genetic and Developmental BiologyChinese Academy of SciencesShijiazhuang 050021China Wageningen Environmental Research Wageningen University&ResearchWageningen6700 AAthe Netherlands Lancaster Environment Centre University of LancasterLancasterLA14YQUK

Reconciling the tasks of producing adequate amounts of nutritious food for the increasing global population while preserving the environment and natural ecosystems simultaneously is an enormous challenge. The concept of agriculture green development(AGD) and the necessary governmental policies were developed to address the aforementioned challenge in China and to help achieve the related global sustainable development goals. Agriculture green development emphasizes the synergy between green and development;current agriculture has to transform from the intensive farming with high inputs, high environmental impacts and low resource-use efficiency to a more sustainable agriculture, in order to ensure an adequate supply of nutritious food while delivering environmental integrity, improved economic profitability,and social equity. A research program on AGD was established by China Agricultural University with four research themes, namely: green crop production, green integrated crop-animal production, green food and industry,and green ecological environment and ecosystem services, to provide a scientific basis for future developments and to facilitate the implementation of AGD in practice. AGD requires a multistakeholder approach, fueled by innovative and interdisciplinary research. Joint actions have to be taken by governments, farmers, supply industries, consumers, educators, extension services and researchers to support AGD. This requires strong coordination and public awareness campaigns. This review presents the progress that has been made over the past 5 years and makes recommendations for more research and development, in order to better deliver agricultural green and sustainable development on national and international scales.

关键词： Agriculture ecosystem services environmental protection food security green development multi-sectoral cooperation sustainable development

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The role of gut microbiota associated metabolites in digestive disorders

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Engineered Regeneration

Engineered Regeneration 2024年第2期5卷 228-246页

作者： Na Li Cheng Zhao Pingnan zhang Songting Wu Xiaotan Dou Saifei Xu Xiaoqi zhang Chunyan Peng Ying Xie Shuling Huang Lin Zhou Yonghua Shen Lei Wang Jinglin Wang Chenggong Yu Department of Gastroenterology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing210008China Division of Hepatobiliary and Transplantation Surgery Department of Gernal SurgeryNanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjing210008China

The gut has been a focal point in the research of digestive system disorders.The internal microbiota generates metabolites that function as signaling molecules and substrates,interacting with the intestinal wall and influ-encing host physiology and pathology.Besides,the gut microbiota and metabolites owe highly diverse types and quantities,posing challenges for quantitative analysis,and monitoring frequent interactions between diges-tive tract metabolites and the intestinal wall remains a challenge.However,research targeting gut microbiota metabolites has elucidated their relevance to digestive diseases.By modulating metabolites such as short-chain fatty acids,bile acids,and lipopolysaccharides,it is possible to intervene in the progression of diseases such as inflammatory bowel disease and non-alcoholic fatty liver disease.Currently,research on gut microbiota is advancing,and more work is required to explore the interactions between host,microbes and underlying mech-anisms.In this review,we have revisited the generation of gut microbiota-related metabolites,their impact on diseases,and modes of interaction,emphasizing the significant role of metabolites in digestive system disorders.It is believed that the linkage between gut microbiota and diseases in current research can be established through metabolites,providing a framework and foundation for research in the field of metabolomics and fundamental mechanisms.

关键词： Gut microbial metabolites Digestive disorders Inflammatory bowel disease(IBD) Non-alcoholic fatty liver disease(NAFLD)

Oxidative Desulfurization of Fuel Oil with H_(3)PO_(4)-based Deep Eutectic Solvents

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China Petroleum Processing & Petrochemical Technology 2024年第2期26卷 178-186页

作者： Li Xiuping zhang Jiayin Hou Liangpei Zhao Rongxiang School of Petrochemical Engineering Liaoning Petrochemical UniversityFushun 113001China

A series of Lewis-acid deep eutectic solvents (DESs) were synthesized by stirring phosphoric acid and zincchloride as raw materials at 80 °C to form H_(3)PO_(4)/nZnCl_(2) (n = 0.1, 0.25, 0.5, 0.75, 1). The DESs were characterized byFourier transform infrared spectrophotometry (FT-IR), thermogravimetry/differential thermogravimetry (TG/DTG), andelectron spray ionization mass spectrometry (ESI-MS). The DESs were used as both extractants and catalysts to removedibenzothiophene from fuels via oxidative desulfurization (ODS). Experiments were performed to investigated the influenceof factors such as composition of DES, temperature, oxidant dosage (molar ratio of O:S), DES dosage (volume ratio ofDES:oil), and number of cycles on desulfurization rate. The results indicated that the removal rate of dibenzothiophene (DBT)was affected by the Lewis acidic DESs, with that of H_(3)PO_(4)/0.25∙ZnCl_(2) reaching 96.4% under optimal conditions (Voil=5 mL,VDES=1 mL, an oxidant dosage of 6, T=50 ℃). After six cycles, the desulfurization rate of H_(3)PO_(4)/0.25∙ZnCl_(2) remained above94.1%. The apparent activation energy of dibenzothiophene (DBT) removal reaction was determined by a pseudo-first orderkinetic equation according to the Arrhenius equation to be 32.34 kJ/mol, as estimated. A reaction mechanism is proposedbased on the experimental data and characterization results.

关键词： deep eutectic solvents phosphoric acid zinc chloride oxidative desulfurization

5岁以上川崎病儿童合并冠状动脉病变的预测指标与风险模型构建

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中国当代儿科杂志 2024年第5期26卷 461-468页

作者：张华勇张勇华中科技大学同济医学院附属武汉儿童医院/武汉市妇幼保健院心血管内科湖北武汉430016

目的探讨5岁以上川崎病(Kawasaki disease,KD)儿童合并冠状动脉病变(coronary artery lesion)的预测指标并构建风险预测模型。方法回顾性分析2018年1月—2023年1月华中科技大学同济医学院附属武汉儿童医院收治的5岁以上KD患儿的临床资料... 详细信息

目的探讨5岁以上川崎病(Kawasaki disease,KD)儿童合并冠状动脉病变(coronary artery lesion)的预测指标并构建风险预测模型。方法回顾性分析2018年1月—2023年1月华中科技大学同济医学院附属武汉儿童医院收治的5岁以上KD患儿的临床资料,其中合并CAL 47例,未合并CAL 178例。采用多因素logistic回归分析探讨5岁以上KD儿童合并CAL发生的预测指标并构建风险预测模型,采用受试者操作特性曲线评价预测模型的效果。最后根据Framingham风险评分法对预测指标进行分层量化,计算各指标对5岁以上KD儿童合并CAL预测的贡献值并构建风险预测评分模型。结果多因素logistic回归分析显示,首剂静脉注射免疫球蛋白(intravenous immunoglobulin,IVIG)治疗前发热时长(OR=1.374,95%CI:1.117~1.689)、超敏C反应蛋白(hypersensitive C-reactive protein,hs-CRP;OR=1.008,95%CI:1.001~1.015)及血清铁蛋白(OR=1.002,95%CI:1.001~1.003)是5岁以上KD儿童合并CAL发生的预测指标。各指标预测CAL发生的最佳截断值为:首剂IVIG治疗前发热时长为6.5 d(AUC=0.654,95%CI:0.565~0.744),hs-CRP为110.50 mg/L(AUC=0.686,95%CI:0.597~0.774),铁蛋白为313.62 mg/L(AUC=0.724,95%CI:0.642~0.805)。据Framingham风险评分法对预测指标赋值并构建风险预测评分模型,将CAL发生的低、中、高危状态分别定义为发生概率20%,对应分值分别为0~4分、5~6分、≥7分。结论在5岁以上KD患儿中,首次IVIG治疗前发热时间较长、hs-CRP水平较高或血清铁蛋白水平较高者,易发生CAL。

关键词：川崎病冠状动脉病变预测指标风险预测模型儿童

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联合作战无人机情报处理与共享体系结构研究

舰船电子工程 2014年第7期34卷 47-50页

作者：齐智敏张明义陆军军官学院合肥230031

联合作战战场上如何实现情报的综合处理和全域共享,满足信息化战场态势感知对电子侦察情报的需求,已成为重要的研究课题。论文对目前我军无人机情报处理与共享的现状和存在的问题进行了分析与总结,尝试性地构建了适应我军无人机未来发... 详细信息

联合作战战场上如何实现情报的综合处理和全域共享,满足信息化战场态势感知对电子侦察情报的需求,已成为重要的研究课题。论文对目前我军无人机情报处理与共享的现状和存在的问题进行了分析与总结,尝试性地构建了适应我军无人机未来发展需要的情报处理与共享体系,并提出了对无人机情报处理与共享的发展展望。

关键词：联合作战无人机情报处理情报共享

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