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数字孪生在航空航天结构设计、制造和运维中的应用与展望

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图学学报 2024年第2期45卷 241-249页

作者：黄文恺梁智洪王明华张文丰王奕首厦门大学航空航天学院福建厦门361000 上海宇航系统工程研究所上海201108

数字孪生技术应用于航空航天领域是当前和未来的重要发展趋势,采取虚实结合方式模拟航空航天结构在不同工作状态下的行为和性能演化,可为结构的优化设计、高效率制造和低成本维护提供全方位的支持。综述了数字孪生在航空航天结构全生命... 详细信息

数字孪生技术应用于航空航天领域是当前和未来的重要发展趋势,采取虚实结合方式模拟航空航天结构在不同工作状态下的行为和性能演化,可为结构的优化设计、高效率制造和低成本维护提供全方位的支持。综述了数字孪生在航空航天结构全生命周期管理中的应用现状,总结了航空航天结构数字孪生存在的问题、挑战和发展趋势。

关键词：数字孪生航空航天结构健康监测结构设计制造智能运维

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‘东试早柚’果实无核成因探究

华中农业大学学报 2024年第05期43卷 91-97页

作者：刘承浪黄文铠闫素云周先艳董美超徐祥增高世德高俊燕柴利军邓秀新果蔬园艺作物种质创新与利用全国重点实验室/华中农业大学园艺林学学院云南省农业科学院热带亚热带经济作物研究所云南省热带作物科学研究所

为明确‘东试早柚’果实无核成因，以‘东试早柚’及其杂交群体为试材，利用醋酸洋红和苯胺蓝染色法、杂交授粉及分子标记等手段探究‘东试早柚’无核原因。结果显示：‘东试早柚’的花结构完整，花粉活力及萌发率分别为94.80%和86.20%... 详细信息

为明确‘东试早柚’果实无核成因，以‘东试早柚’及其杂交群体为试材，利用醋酸洋红和苯胺蓝染色法、杂交授粉及分子标记等手段探究‘东试早柚’无核原因。结果显示：‘东试早柚’的花结构完整，花粉活力及萌发率分别为94.80%和86.20%；‘东试早柚’自交表现为不亲和，而与‘沙田柚’杂交亲和；利用S5、S6基因型分子标记从‘沙田柚’×‘东试早柚’的175株杂交子代中共鉴定出F1代杂种164株，排除了‘东试早柚’雄性不育的可能；连续2 a田间试验观察显示，‘东试早柚’刺激性单性结实和天然单性结实的平均座果率分别为13.04%和25.56%。结果表明‘，东试早柚’自交不亲和并具有一定的单性结实能力是导致其无核的主要成因。

关键词： ‘东试早柚’ 雄性不育自交不亲和单性结实

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南海中央海盆海底初始扩张时间的重新认定

热带海洋学报 2024年第2期43卷 154-165页

作者：邱燕鞠东黄文凯王英民聂鑫广州海洋地质调查局自然资源部海底矿产资源实验室广东广州510075 中国石油大学(北京) 北京100031

由于磁异常条带识别的不确定性而使其具有多解性,因此对于应用磁异常条带对比得出的南海中央海盆海底初始扩张时间一直存在较大的争议。随着南海勘探活动的不断深入和资料的大量积累,有必要对这一重要问题给予重新认定。最新研究发现:... 详细信息

由于磁异常条带识别的不确定性而使其具有多解性,因此对于应用磁异常条带对比得出的南海中央海盆海底初始扩张时间一直存在较大的争议。随着南海勘探活动的不断深入和资料的大量积累,有必要对这一重要问题给予重新认定。最新研究发现:南海中央海盆初始扩张区域的南、北边缘发育晚始新世-早渐新世(T7-Tog)沉积层序,说明洋壳基底之上的最早沉积层年代要老于原来认识的32-33Ma。在南海,持续时间长、活动强烈、形成近东-西向构造体系的变革运动发生时间为40Ma左右。南海陆缘不整合面对比证实,将T8界面(37.2-40Ma)作为南海初始扩张的破裂不整合面更为准确。由此得出结论,南海中央海盆海底初始扩张时间应为39-40Ma左右。

关键词：海底初始扩张时间磁异常条带对比洋壳基底东-西向构造体系南海中央海盆

Data driven reduced modeling for fluidized bed with immersed tubes based on PCA and Bi-LSTM neural networksAuthor links open overlay panel

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Particuology 2024年第8期91卷 1-18页

作者： Jiabin Fang wenkai Cu huang Liu Huixin Zhang Hanqing Liu Jinjia Wei Xiang Ma Nan Zheng School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'anShaanxi 710049China

The fast and accurate reduced-order modeling of fluidized beds is a challenging task in the field of fluid dynamics,owing to their high dimensionality and nonlinear dynamic *** this study,a nonintrusive reduced order modeling method,the reduced order model based on principal component analysis and bidirectional long short-term memory networks(PBLSTM ROM),was developed to capture complex spatio-temporal dynamics of fluidized *** combining principal component analysis and Bidirectional long-short-term memory networks,the PBLSTM ROM effectively extracted dynamic evolution information without any prior knowledge of governing equations,enabling reduced-order modeling of unsteady flow *** PBLSTM ROM was validated using the solid volume fraction and gas velocity flow fields of a fluidized bed with immersed tubes,showing superior performance over both the PLSTM and PANN ROMs in accurately capturing temporal changes in the fluidization fields,especially in the region near immersed tubes where severe fluctuations ***,the PBLSTM ROM improved the simulation speed by five orders of magnitude compared to traditional computational fluid dynamics *** findings suggest that the PBLSTM ROM presents a promising approach for analyzing the complex fluid flows in engineering practice.

关键词： Reduced order modeling Fluidized bed Deep learning Bi-LSTM

Mass Transfer-Promoted Fe^(2+)/Fe^(3+)Circulation Steered by 3D Flow-Through Co-Catalyst System Toward Sustainable Advanced Oxidation Processes

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Engineering 2024年第5期36卷 264-275页

作者： Weiyang Lv Hao Li Jinhui Wang Lixin Wang Zenglong Wu Yuge Wang wenkai Song wenkai Cheng Yuyuan Yao National Engineering Lab of Textile Fiber Materials and Processing Technology(Zhejiang) Zhejiang Sci-Tech UniversityHangzhou 310018China Zhejiang Provincial Innovation Center of Advanced Textile Technology Shaoxing 312000China Jiangsu Ruiya Stirring Technology Co. Ltd.Yixing 214200China

Realizing fast and continuous generation of reactive oxygen species(ROSs)via iron-based advanced oxidation processes(AOPs)is significant in the environmental and biological ***,current AOPs assisted by co-catalysts still suffer from the poor mass/electron transfer and non-durable promotion effect,giving rise to the sluggish Fe^(2+)/Fe^(3+)cycle and low dynamic concentration of Fe^(2+)for ROS ***,we present a three-dimensional(3D)macroscale co-catalyst functionalized with molybdenum disulfide(MoS_(2))to achieve ultra-efficient Fe^(2+)regeneration(equilibrium Fe^(2+)ratio of 82.4%)and remarkable stability(more than 20 cycles)via a circulating flow-through *** the conventional batch-type reactor,experiments and computational fluid dynamics simulations demonstrate that the optimal utilization of the 3D active area under the flow-through mode,initiated by the convectionenhanced mass/charge transfer for Fe^(2+)reduction and then strengthened by MoS_(2)-induced flow rotation for sufficient reactant mixing,is crucial for oxidant activation and subsequent ROS ***,the flow-through co-catalytic system with superwetting capabilities can even tackle the intricate oily wastewater stabilized by different surfactants without the loss of pollutant degradation *** findings highlight an innovative co-catalyst system design to expand the applicability of AOPs based technology,especially in large-scale complex wastewater treatment.

关键词： Advanced oxidation processes 3D co-catalyst Flow-through mode Enhanced mass transfer Complex wastewater treatment

Supergravity effects on flame propagation and structure in hydrogen/air mixtures

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Acta Mechanica Sinica 2024年第6期40卷 31-38页

作者： wenkai Liang Chung K.Law Center for Combustion Energy Department of Energy and Power EngineeringTsinghua UniversityBeijing100080China Department of Mechanical and Aerospace Engineering Princeton UniversityPrinceton08544USA

In the current work,we investigated hydrogen/air flame propagation under supergravity *** show that when gravity is in the same/opposite direction as flame propagation,it leads to acceleration/deceleration of the flame,and that such an effect could substantially modify the flame propagation and structure at high gravity ***,for the absolute and relative flame propagation speeds,the gravity-affected flame speed shows opposite trends as the absolute flame speed is more affected by the local induced flow field,while the relative flame speeds are controlled by the super-adiabatic or sub-adiabatic flame *** gravity-affected thermal and chemical flame structures are also examined through the influence of the mixture equivalence ratio,pressure,and flame stretch.

关键词： Supergravity Flame acceleration Laminar flame speed Flame stretch Hydrogen

Q-BioLiP:A Comprehensive Resource for Quaternary Structure-based Protein-ligand Interactions

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Genomics, Proteomics & Bioinformatics 2024年第1期22卷 151-159页

作者： Hong Wei wenkai Wang Zhenling Peng Jianyi Yang School of Mathematical Sciences Nankai UniversityTianjin 300071China MOE Frontiers Science Center for Nonlinear Expectations Research Center for Mathematics and Interdisciplinary SciencesShandong UniversityQingdao 266237China

Since its establishment in 2013,BioLiP has become one of the widely used resources for protein-ligand ***,several known issues occurred with it over the past *** example,the protein-ligand interactions are represented in the form of single chain-based tertiary structures,which may be inappropriate as many interactions involve multiple protein chains(known as quaternary structures).We sought to address these issues,resulting in Q-BioLiP,a comprehensive resource for quaternary structure-based protein-ligand *** major features of Q-BioLiP include:(1)representing protein structures in the form of quaternary structures rather than single chain-based tertiary structures;(2)pairing DNA/RNA chains properly rather than separation;(3)providing both experimental and predicted binding affinities;(4)retaining both biologically relevant and irrelevant interactions to alleviate the wrong justification of ligands’biological relevance;and(5)developing a new quaternary structure-based algorithm for the modelling of protein-ligand complex *** these new features,Q-BioLiP is expected to be a valuable resource for studying biomolecule interactions,including protein-small molecule interaction,protein-metal ion interaction,protein-peptide interaction,protein-protein interaction,protein-DNA/RNA interaction,and RNA-small molecule interaction.Q-BioLiP is freely available at https://***/Q-BioLiP/.

关键词： Protein-ligand interaction Quaternary structure Protein-ligand binding site Protein-protein interaction Binding affinity

Ablation of drivers in patients with persistent atrial fibrillation refractory to pulmonary vein antral isolation: Target characteristics and 3-year outcomes

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中华医学杂志(英文版) 2024年第14期137卷 1747-1749页

作者： Shi Liang Qi Jie Wang Yanjiang Liao wenkai Li Xuexun He Shunan huang Lihong Tian Ying Liu Xingpeng Department of Cardiology Beijing Chaoyang Hospital Capital Medical University Beijing China

To the Editor: Pulmonary vein antral isolation (PVAI) is the cornerstone of catheter ablation techniques used in the treatment of patients with atrial fibrillation (AF). However, the outcomes of a PVAI-only strategy for persistent AF have proven suboptimal. The majority of patients with persistent AF may require further atrial ablation beyond PVAI. Ablation of AF drivers, a patient-tailored ablation strategy for persistent AF with a procedural endpoint of AF termination, has garnered increasing attention in recent years. We aimed to determine the electrogram (EGM) characteristics of AF drivers that can predict AF termination.

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关于她的痛苦——论中国当代文学“慰安妇”题材小说

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南方文坛 2021年第3期 168-174页

作者：黄文凯广西大学文学院南京大屠杀史与国际和平研究院

日本在二战期间实施了惨无人道的"慰安妇"制度,二十余万中国女性被日军强征为性奴隶,惨遭日军奸淫,受尽无数折磨,身心遭受巨大痛苦。由于日军在战败之际销毁了大量强征"慰安妇"的证据,东京审判未把性暴力作为专门罪行审判,以及受传统贞... 详细信息

日本在二战期间实施了惨无人道的"慰安妇"制度,二十余万中国女性被日军强征为性奴隶,惨遭日军奸淫,受尽无数折磨,身心遭受巨大痛苦。由于日军在战败之际销毁了大量强征"慰安妇"的证据,东京审判未把性暴力作为专门罪行审判,以及受传统贞洁观念的束缚,鲜有日军"慰安妇"制度幸存者勇于承认自身的遭遇,因而在战后该群体几乎处于噤声状态。对于她们的了解,更多人是从丁玲《我在霞村的时候》、谢冰莹《梅子姑娘》、王思季《朝鲜少女吟》以及陈定编剧的《秋子》等短篇小说或诗词戏曲了解到曾经存在过的"慰安妇"。

关键词：中国当代文学谢冰莹《我在霞村的时候》慰安妇强征性暴力东京审判贞洁观念