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Nano Research 2024年第4期17卷 2360-2367页

作者： xiao-yan li Manyi Duan Pengfei Ou Department of Electrical and Computer Engineering University of TorontoTorontoOntario M5S 1A4Canada School of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610101China Department of Chemistry Northwestern UniversityEvanstonIL 60208USA

The discovery of metal-nitrogen centers as the active sites for electrolysis has aroused significant interest in utilizing single-atom catalysts for nitrogen reduction reaction(NRR).Properly designed nanostructured catalysts that strongly interact with nitrogen molecules(N_(2))can promote adsorption and activation,thereby resulting in efficient catalysts with high stability,activity,and *** this study,using density functional theory calculations,we selected monolayer black phosphorus(BP)as the substrate and screened a series of single-atom transition metals confined in tri-coordinated and tetra-coordinated active centers(without and with N dopants)to electro-catalyze *** a result,we have identified two promising candidates(Hf_(1)-N_(1)P_(2)-1 and Tc_(1)-N_(4)),which exhibit not only low overpotentials of 0.56 and 0.49 V but also high thermodynamic and electrochemical stability,as well as good selectivity towards NRR over the competing hydrogen evolution *** also demonstrate the ability of Hf_(1)-N_(1)P_(2)-1 and Tc_(1)-N_(4) to activate and hydrogenate N_(2) by donating electrons and regulating charge *** study not only predicts new BP-based promising catalysts but also provides guidance for the rational design of high-performance NRR electrocatalysts under ambient conditions.

关键词： N_(2) electroreduction reaction single-atom catalysts black phosphorus density functional theory high-throughput calculations

Alzheimer’s disease early diagnostic and staging biomarkers revealed by large-scale cerebrospinal fluid and serum proteomic profiling

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The Innovation 2024年第1期5卷 118-126页

作者： Qing-Qing Tao Xue Cai yan-yan Xue Weigang Ge liang Yue xiao-yan li Rong-Rong lin Guo-Ping Peng Wenhao Jiang Sainan li Kun-Mu Zheng Bin Jiang Jian-Ping Jia Tiannan Guo Zhi-Ying Wu Department of Neurology and Research Center of Neurology in the Second Affiliated Hospital and Key Laboratory of Medical Neurobiology of Zhejiang Province Zhejiang University School of MedicineHangzhou 310009China liangzhu Laboratory Zhejiang UniversityHangzhou 311100China Westlake Laboratory of life Sciences and Biomedicine Key Laboratory of Structural Biology of Zhejiang ProvinceSchool of Life SciencesWestlake UniversityHangzhou 310024China Institute of Basic Medical Sciences Westlake Institute for Advanced StudyHangzho 310024China Department of Neurology First Affiliated HospitalZhejiang University School of MedicineHangzhou 310009China Department of Neurology First Affiliated HospitalSchool of MedicineXiamen UniversityXiamen 361009China Innovation Center for Neurological Disorders and Department of Neurology Xuanwu HospitalCapital Medical UniversityNational Clinical Research Center for Geriatric DiseasesBeijing 100053China MOE Frontier Science Center for Brain Science and Brain-machine Integration School of Brain Science and Brain MedicineZhejiang UniversityHangzhou 310058China CAS Center for Excellence in Brain Science and Intelligence Technology Shanghai 200031China

Amyloid-b,tau pathology,and biomarkers of neurodegeneration make up the core diagnostic biomarkers of Alzheimer disease(AD).However,these proteins represent only a fraction of the complex biological processes underlying AD,and individuals with other brain diseases in which AD pathology is a comorbidity also test positive for these diagnostic *** ADspecific early diagnostic and disease staging biomarkers are *** this study,we performed tandem mass tag proteomic analysis of paired cerebrospinal fluid(CSF)and serum samples in a discovery cohort comprising 98 *** biomarkers were validated by parallel reaction monitoring–based targeted proteomic assays in an independent multicenter cohort comprising 288 *** quantified 3,238 CSF and 1,702 serum proteins in the discovery cohort,identifying 171 and 860 CSF proteins and 37 and 323 serum proteins as potential early diagnostic and staging biomarkers,*** the validation cohort,58 and 21 CSF proteins,as well as 12 and 18 serum proteins,were verified as early diagnostic and staging biomarkers,*** 19-protein CSF and an 8-protein serum biomarker panels were built by machine learning to accurately classify mild cognitive impairment(MCI)due to AD from normal cognition with areas under the curve of 0.984 and 0.881,*** 19-protein CSF biomarker panel also effectively discriminated patients with MCI due to AD from patients with other neurodegenerative ***,we identified 21 CSF and 18 serum stage-associated proteins re-flecting AD *** findings provide a foundation for developing bloodbased tests for AD screening and staging in clinical practice.

关键词： cerebrospinal Alzheimer fluid

Enhancing transjugular intrahepatic portosystemic shunt procedure efficiency with digital subtraction angiography image overlay technology in esophagogastric variceal bleeding

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World Journal of Gastrointestinal Surgery 2024年第9期16卷 2870-2877页

作者： xiao-yan li Yao li Wen-Qiang li Shuai Ju Zhi-Hui Dong Jian-Jun Luo Vascular and Wound Center Jinshan HospitalFudan UniversityShanghai 201508China Department of Vascular Surgery Institute of Vascular SurgeryZhongshan Hospital Fudan UniversityShanghai 200032China Department of Interventional Radiology Zhongshan Hospital Fudan UniversityShanghai 20032China

BACKGROUND Transjugular intrahepatic portosystemic shunt(TIPS)is a pivotal intervention for managing esophagogastric variceal bleeding in patients with chronic hepatic *** To evaluate the efficacy of digital subtraction angiography image overlay tech-nology(DIT)in guiding the TIPS *** We conducted a retrospective analysis of patients who underwent TIPS at our hospital,comparing outcomes between an ultrasound-guided group and a DIT-guided *** analysis focused on the duration of the portosystemic shunt puncture,the number of punctures needed,the total surgical time,and various clinical indicators related to the *** The study included 52 patients with esophagogastric varices due to chronic hepatic *** demonstrated that the DIT-guided group expe-rienced significantly shorter puncture times(Plirubin(P=0.001)and alanine aminotransferase(P=0.023).CONCLUSION The use of DIT for guiding TIPS procedures highlights its potential to enhance procedural efficiency and reduce surgical times in the treatment of esophagogastric variceal bleeding in patients with chronic hepatic schistoso-miasis.

关键词： Portal hypertension Digital subtraction angiography Image overlay technology Hepatic artery labeling Transjugular intrahepatic portosystemic shunt

贵州现代乡村表演与中华民族共同体意识的呈现——以贵州“村BA”与“村超”为例

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中南民族大学学报（人文社会科学版） 2024年第4期44卷 98-106,220页

作者：朱全国肖艳丽浙江师范大学人文学院浙江金华321000 浙江师范大学艺术学院浙江金华321000

从社会表演学与人类表演学的角度来看,贵州“村BA”与“村超”已经成为现代乡村表演的代表性存在。贵州“村BA”与“村超”之所以成为具有世界影响力的一种现象级的表演形式,主要原因有三点:一是它们满足了疫情后人们缓解焦虑、增强信... 详细信息

从社会表演学与人类表演学的角度来看,贵州“村BA”与“村超”已经成为现代乡村表演的代表性存在。贵州“村BA”与“村超”之所以成为具有世界影响力的一种现象级的表演形式,主要原因有三点:一是它们满足了疫情后人们缓解焦虑、增强信任、积极参与社会活动的心理需求;二是它们兼具民族传统体育、休闲体育、世界性与全民性、文化综合体等多种属性,满足了不同层面人们的精神需求;三是国家主流媒体的推动,互联网与各种自媒体以及完善的地方融媒体中心的热切关注,使其广泛传播。各个民族积极参与、团结和谐,展示了民众无处不在的家国情怀与对党的拥护,中华民族共同体意识自然而然地涌现出来。“村BA”与“村超”的成功案例,为铸牢中华民族共同体意识提供了一种由内而外的新思路。

关键词：现代乡村表演中华民族共同体意识村BA 村超民族文化

混合式学习背景下的大学生深度自主学习路径研究

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湖北开放职业学院学报 2024年第8期37卷 171-173页

作者：肖丽艳吉首大学外国语学院湖南张家界427000

线下线上混合式学习方式已经成为当前大学生学习的主要方式,而深度自主学习是对新时期大学生学习的新要求。学习分为浅层学习和深度学习、自主学习和非自主学习,研究发现深度自主学习学习效果更好。本文在分析浅层学习与深度学习、自主... 详细信息

线下线上混合式学习方式已经成为当前大学生学习的主要方式,而深度自主学习是对新时期大学生学习的新要求。学习分为浅层学习和深度学习、自主学习和非自主学习,研究发现深度自主学习学习效果更好。本文在分析浅层学习与深度学习、自主学习与非自主学习的差异后根据学习金字塔理论和费曼学习法提出了适合大学生学习的“参与+平台+输出+实践”四位一体学习法,并对于四位一体自主学习路径进行了细致剖析,具有实际的可操作性,进而推进教育教学改革。

关键词：混合式学习深度学习自主学习四位一体

Effects of boundary slippage on thin-film lubricationbetween two nonparallel plane plates

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Acta Mechanica Sinica 2012年第3期28卷 625-630页

作者： Shu-Hao Ban xiao-yan li College of Mechanical and Energy Engineering Changzhou University

Hydrodynamic lubrications between two plane plates with an intersection angle θ have been investigated us- ing the boundary slippage theory, and relations are obtained between dimensionless pressures and coordinate x, between bearing capacity, friction force, friction coefficient and di- mensionless slipping size factor. The results show that bear- ing capacity of two plane plates without boundary slippage significantly increases with increasing intersection angle θ when 0 〈 θ 〈 1°, whereas decreases with increasing in- tersection angle 0 when θ 〉 1°. The results also show that negative pressure occurs in fluid entrance region and bearing capacity decreases, and friction force and friction coefficient increase with the increase of dimensionless slipping size fac- tor.

关键词： Bearing capacity Boundary slippage Dimen-sionless slipping size factor Friction coefficient Hydrody-namic lubrication Negative pressure

可控构建分级多孔炭载CoP纳米颗粒催化剂用于高效氧还原反应

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新型炭材料（中英文） 2024年第3期39卷 526-537页

作者：闫晓丽王奎郝姝葳周广达杨浩伟张华郭俊杰太原理工大学材料科学与工程学院新材料界面科学与工程教育部重点实验室山西太原030024 华侨大学材料科学与工程学院福建厦门361021

为金属空气电池等热点能源器件中的阴极氧还原反应(ORR)设计低成本和高效率的无贵金属催化剂仍然是一项巨大的挑战。过渡金属磷化物(TMPs)因其可调的电子结构及优异的催化性能,有望替代贵金属催化剂。本文采用磷化策略(350℃下二次热解)... 详细信息

为金属空气电池等热点能源器件中的阴极氧还原反应(ORR)设计低成本和高效率的无贵金属催化剂仍然是一项巨大的挑战。过渡金属磷化物(TMPs)因其可调的电子结构及优异的催化性能,有望替代贵金属催化剂。本文采用磷化策略(350℃下二次热解),构建了一种在分层多孔炭框架上负载由掺氮炭壳包裹的CoP纳米颗粒催化剂(CoP@NC)。在二次热解过程中,Co纳米颗粒在NaH_(2)PO_(2)生成的PH_(3)气体下原位转化为CoP纳米颗粒,而载体的十二面体结构没有发生改变。在碱性条件下,CoP@NC电催化剂表现出优异的ORR活性,半波电位高达0.92 V,这归因于分散良好的CoP纳米颗粒与炭壳之间的协同耦合以及载体多孔结构实现的高效质量传输。此外,使用CoP@NC组装的锌-空气电池展现出1.51 V的高开路电压和210.1 mW cm^(-2)的功率密度。这项研究将有助于开发低成本和高效率的ORR电催化剂。

关键词：电催化剂 Co基催化剂金属磷化物 ORR 锌-空气电池

Acidogenic sludge fermentation to recover soluble organics as the carbon source for denitrification in wastewater treatment： Comparison of sludge types

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Frontiers of Environmental Science & Engineering 2018年第4期12卷 25-32页

作者： lin lin Ying-yu li xiao-yan li Environmental Engineering Research Centre Departmelt of Civil Engineering The University of Hong Kong Pokfulam Hong Kong China Shenzhen Engineering Research Laboratory for Sludge and Food Waste Treatment and Resource Recovery Graduate School at Shenzhcn Tsinghua University Shcnzhen 518055 China＊

For biological nitrogen （N） removal from wastewater, a sufficient organic carbon source is requested fbr denitrification. However. the organic carbon/nitrogen ratio in municipal wastcwatcr is becoming lower in recent years, which increases the demand for the addition of external organic carbon, e.g. methanol, in wastewater treatment. The volatile fatty acids （VFAs） produced by acidogenic fenncntation of sewage sludge can be an attractive alternative for methanol. Chemically enhanced primary sedimentation （CEPS} is an effective process that applies chemical coagulants to enhance the removal of organic pollutants and phosphorus from wastewater by sedimentation. In temls of the chemical and biological characteristics, the CEPS sludge is considerably different from the conventional primary and secondary sludge. In the present study, FeCI3 and PACI （polyalunfinum chloride） were used as the coagulants for CEPS treatment of raw sewage. The derived CEPS sludge （Fe-sludge and Al-sludge） was then processed with mcsophilic acidogenic fennentation to hydrolysc the solid organics and produce VFAs for organic carbon recovery, and the sludge acidogenesis efficiency was compared with that of the conventional primary sludge and secondary sludge. The results showed that the Fe-sludge exhibited the highest hydrolysis and acidogenesis efficiency, while the Al-sludge and secondary＇ sludge had lower hydrolysis efficiency than that of primary sludge. Utilizing ffie Fc-sludgc fermentation liquid as tbc carbon source for denitrificatiom more than 99%of nitrate removal was achieved in the main-stream wastewater treatment without any external carbon addition, instead of 35% obtained from the conventional process of primary sedimentation followed by the oxic/anoxic （O/A） treatment.

关键词： Sewage sludge Chemically enhanced primary sedimentation(CEPS) Acidogenic fermentation Organic carbon recovery Nitrogen removal

Correlation Between Microstructure and Mechanical Properties of 2219-T8 Aluminum Alloy Joints by VPTIG Welding

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Acta Metallurgica Sinica(English Letters) 2017年第5期30卷 438-446页

作者： Lan-Qiang Niu xiao-yan li liang Zhang xiao-Bo liang Mian li College of Materials Science and Engineering Beijing University of TechnologyBeijing 100124China

In this study, 2219-T87 aluminum alloys were butt welded by the double-pass tungsten inert gas arc welding process. And the softening behavior of fusion zone（FZ） and heat-affected zone（HAZ） was evaluated with the analysis of welding temperature field, grain size, alloying element distribution and precipitates evolution. Results show that the two FZs are almost the weakest regions in the joint, where the microhardness value is 76 and 78 HV, respectively. Microhardness of the HAZ generally grows along with increasing distance from fusion line except a valley value at the distance of about 4.5 mm. The mean grain size of two FZs is about 74.4 and 79.2 lm, whereas 41.5, 44.9 and 43.4 lm for the two measured HAZs and base metal（BM）, respectively. There is about 60.4% and 54.2% Cu consumed in the coarse whitish particles of FZs that have little strengthening effect, while the percentage is about 24.6% of BM that is almost the same as HAZ. A large number of strengthening phases h0 distribute dispersively in BM, whereas hardly any precipitates exist in FZ and HAZ adjacent to FZ. So the coarsening of grain size, reduction and segregation of alloying element content, and the precipitate evolution are regarded as the main causes of softening in FZ, while the precipitate evolution is the main factor of softening in HAZ.

关键词： 2219-T87 Aluminum alloy TIG welding Fusion zone Heat-affected zone Softening behavior

Recent advances of computational aeroacoustics

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Applied Mathematics and Mechanics(English Edition) 2015年第1期36卷 131-140页

作者： xiao-dong li Min JIANG Jun-hui GAO Da-kai liN li liU xiao-yan li School of Energy and Power Engineering Beihang University Beijing Aeronautical Science & Technology Research Institute of Commercial Aircraft Corporation of China Beijing Institute of Space Launch Technology Research and Development Center China Academy of Launch Vehicle Technology

Computational aeroacoustics （CAA） is an interdiscipline of aeroacoustics and computational fluid dynamics （CFD） for the investigation of sound generation and propagation from various aeroacoustics problems. In this review, the foundation and research scope of CAA are introduced firstly. A review of the early advances and applications of CAA is then briefly surveyed, focusing on two key issues, namely, high order finite difference scheme and non-reflecting boundary condition. Furthermore, the advances of CAA during the past five years are highlighted. Finally, the future prospective of CAA is briefly discussed.

关键词： aeroacoustics computational aeroacoustics (CAA) high order finite difference scheme non-reflecting boundary condition