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地质力学学报 2025年第1期31卷 91-108页

作者：田旭文王彦兵朱姝姚鑫李显鑫中国地质科学院地质力学研究所北京100081 国网经济技术研究院有限公司北京102209 自然资源部活动构造与地质安全重点实验室北京100081

藏东南地区独特的地形地貌和气候条件特点,使之蕴藏着非常丰富的水电资源。为保障藏东南输电走廊北线的地质选线、建设和运营工作,文章通过归纳总结国内外文献资料,详细阐述了输电走廊北线沿线区域地质环境和主要地质安全隐患,并对藏东... 详细信息

藏东南地区独特的地形地貌和气候条件特点,使之蕴藏着非常丰富的水电资源。为保障藏东南输电走廊北线的地质选线、建设和运营工作,文章通过归纳总结国内外文献资料,详细阐述了输电走廊北线沿线区域地质环境和主要地质安全隐患,并对藏东南输电走廊进一步灾害识别与监测工作提出了合理建议。结果表明:藏东南输电走廊沿线构造活动强烈、活动断裂发育、强震频发、地形地貌差异显著、岩土体结构损伤和劣化等独特的区域地质环境,极易诱发地质安全隐患;藏东南输电走廊北线的地质安全隐患主要包括滑坡、崩塌、泥石流、雪(冰)崩、冰湖溃决和冻胀融沉等;沿线地质安全隐患的发育受控于极高陡的地形和复杂的地貌条件、升温融雪气候变化、强烈的断裂活动与频发的地震、内外动力耦合诱发的高位远程灾害链等因素;深入融合InSAR技术、光学遥感、无人机摄影测量、机载liDAR技术和在线实地监测等软防控手段的优势,可以有效打破藏东南输电走廊沿线灾害隐患错判、漏判、少判、智能化程度低和精准性差等困局。研究结果将为藏东南地区水电开发项目规划建设中的地质安全风险防控工作提供理论依据,也对藏东南地区可持续发展具有重要的现实意义。

关键词：输电走廊藏东南地区地质安全问题地质灾害工程地质遥感技术

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Effect of multiple-frequency ultrasound-assisted transglutaminase dual modification on the structural, functional characteristics and application of Qingke protein

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ULTRASONICS SONOCHEMISTRY 2023年 94卷 106317页

作者： li, Aijun Guo, Zehang Wang, Zhirong Yang, Qingqing Wen, Leyan Xiang, xuwen Kan, Jianquan Southwest Univ Coll Food Sci 2 Tiansheng Rd Chongqing 400715 Peoples R China Yangzhou Univ Coll Food Sci & Engn Yangzhou 225127 Jiangsu Peoples R China Chinese Hungarian Cooperat Res Ctr Food Sci Chongqing 400715 Peoples R China Minist Agr & Rural Affairs Peoples Republ China Lab Qual & Safety Risk Assessment Agriprod Storage Chongqing 400715 Peoples R China Chongqing Key Lab Special Food Co Built Sichuan & Chongqing 400715 Peoples R China 2 Tiansheng Rd Chongqing 400715 Peoples R China

Qingke protein rich in restricted amino acids such as lysine, while the uncoordination of ratio of glutenin and gliadin in Qingke protein has a negative impact on its processing properties. In this study, the effect of multiple-frequency ultrasound combined with transglutaminase treatment on the functional and structural properties of Qingke protein and its application in noodle manufacture were investigated. The results showed that compared with the control, ultrasound-assisted transglutaminase dual modification significantly increased the water and oil holding capacity, apparent viscosity, foaming ability, and emulsifying activity index of Qingke protein, which exhibited a higher storage modulus G' (P < 0.05). Meanwhile, ultrasound combined with transglutaminase treatment enhanced the cross-linking degree of Qingke protein (P < 0.05), as shown by decreased free amino group and free sulfhydryl group contents, and increased disulfide bond content. Moreover, after the ultrasound-assisted transglutaminase dual modification treatment, the fluorescence intensity, the contents of alpha-helix and random coil in the secondary structure of Qingke protein significantly decreased, while the beta-sheet content increased (P < 0.05) compared with control. SDS-PAGE results showed that the bands of Qingke protein treated by ultrasound combined with transglutaminase became unclear. Furthermore, the quality of Qingke noodles made with Qingke powder (140 g/kg dual modified Qingke protein mixed with 860 g/kg extracted Qingke starch) and wheat gluten 60-70 g/kg was similar to that of wheat noodles. In summary, multiple-frequency ultrasound combined with transglutaminase dual modification can significantly improve the physicochemical properties of Qingke protein and the modified Qingke proteins can be used as novel ingredients for Qingke noodles.

关键词： Qingke protein Modification Functional properties Application Qingke noodles

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Enhanced gas production from low-permeability hydrate reservoirs based on embedded discrete fracture models: Influence of branch parameters

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ENERGY 2023年第1期282卷

作者： Guo, Yang li, Shuxia Qin, xuwen Lu, Cheng Wu, Didi liu, Lu Zhang, Ningtao China Univ Petr East China Key Lab Unconvent Oil & Gas Dev Minist Educ Qingdao 266580 Peoples R China China Univ Petr East China Sch Petr Engn Qingdao 266580 Peoples R China Minist Nat Resources China Geol Survey Beijing 100037 Peoples R China Minist Nat Resources China Geol Survey Oil & Gas Resources Survey Beijing 100083 Peoples R China East China Bur Sinopec Explorat & Dev Res Inst Nanjing 210019 Peoples R China

The low permeability of marine hydrate reservoirs makes it difficult for trail results to meet the demand for exploitation. Hydraulic fracturing and multi-branch wells are the primary methods for enhancing productivity. This study proposed a new production enhancement method of multi-branch wells combined with multi-stage fracturing (MWMF) based on the embedded discrete fracture model (EDFM). By simulation of the Shenhu area, the multi-physical field evolution of the MWMF production process was first revealed, followed by the systematic analysis of the MWMF production enhancement effect with branch parameters. Results indicated that the cumulative gas production of MWMF increased by 327% compared with only horizontal wells. The production of four-branch wells exhibited a 7% reduction compared to horizontal wells using the MWMF method, suggesting increased branch numbers inhibit production. Increasing branch length was positively correlated with enhanced production. Notably, the influence of branch length on gas production became more pronounced as the number of branches increased. The interface of the three-phase layer (TPL) and hydrate-bearing layer (HBL) was the most suitable location for branch well placement. This novel study provides valuable insights into new applications of the MWMF method in developing low-permeability hydrate reservoirs.

关键词： Natural gas hydrate Multi-branch well Multi-stage fracture Embedded discrete fracture model Enhanced gas production

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心电信号的QRS波检测算法的研究

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兵器装备工程学报 2018年第9期39卷 171-175页

作者：李明星李旭雯魏鑫中国航天科工运载技术研究院北京分院北京102308 北京工业大学生命科学与生物工程学院北京100124 北京控制与电子技术研究所北京100038

对QRS波群快速、准确定位是心电信号自动检测和分析的关键,其前提条件是消除心电信号中的各种噪声干扰;针对提高QRS波群检测算法的抗噪性能,提出了一种基于经验模态分解方法和平稳小波变换相结合的QRS波检测方法;该方法对QRS波检测准确... 详细信息

对QRS波群快速、准确定位是心电信号自动检测和分析的关键,其前提条件是消除心电信号中的各种噪声干扰;针对提高QRS波群检测算法的抗噪性能,提出了一种基于经验模态分解方法和平稳小波变换相结合的QRS波检测方法;该方法对QRS波检测准确率高、定位精度好。

关键词： QRS波群经验模态分解小波变换模极大值

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Interphasial Chemistry Design for Seamless lithium Deposition in Anode-Free lithium Metal Batteries

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ADVANCED MATERIALS 2025年

作者： Song, Xuan liu, Cheng Zhang, Aiyuan Ding, li Zeng, Tianyou Lu, Yang Ou, Yu Hou, Wenhui Zhou, Pan Cao, Qingbin Yan, Shuaishuai liu, Zhi Peng, xuwen Zhou, Haiyu Xia, Yingchun Zhang, Weili liu, Hao liu, Kai Tsinghua Univ Dept Chem Engn Beijing 100084 Peoples R China China Acad Space Technol Beijing 100094 Peoples R China Beijing Mingyuan Space Elect Informat Technol Co L Beijing 100080 Peoples R China Tsinghua Univ Hefei Inst Publ Safety Res Hefei 230601 Peoples R China

Anode-free lithium metal batteries (AFLMBs) are promising due to ultrahigh energy density, reduced manufacturing costs, and enhanced safety through active lithium elimination. However, their practical implementation remains challenged by unstable electrode-electrolyte interfaces and the resulting rapid active species depletion. Herein, an ultrathin ion-conducting membrane (ICM) is designed, featuring uniformly distributed rigid benzenesulfonimide anionic groups and flexible lithiophilic groups containing ether oxygen groups. The constrained benzenesulfonimide anions enable exceptional charge separation and reduced spatial resistance, boosting lithium-ion mobility, while the integrated lithophilic network directs lateral lithium deposition through ionic nanochannels. This ICM layer effectively promotes the enrichment of anions at the interface and constructs stable anion-derived solid electrolyte interphases (SEI). Meanwhile, ICM layers with electron-insulating and ion-conducting properties can further prevent side reactions, and suppress dendritic li growth acting as a natural shield, resulting in seamless lithium deposition. Specifically, the li||Cu coin cells with ICM achieve 99.82% Coulombic efficiency. The AFLMBs assembled with ICM-coated copper foil (ICM Cu) and NCM811 deliver an energy density of 495 Wh kg-1 with 80.72% capacity retention after 100 cycles. The interphasial chemistry design strategy provides insights into the precise interfacial engineering to realize high-performance, high-safety battery systems and facilitates their development for practical applications.

关键词： anode-free lithium metal batteries dendrite suppression interphasial chemistry ion-conducting membranes solid electrolyte interphases

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Development of a nomogram to predict the incidence of acute kidney injury among ischemic stroke individuals during ICU hospitalization

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HEliYON 2024年第3期10卷 e25566页

作者： Ma, Buqing Jin, Guangyong Mao, Fengkai Zhou, Menglu li, Yiwei Hu, Wei Cai, xuwen Hangzhou First Peoples Hosp Dept Crit Care Med 261 Huansha Rd Hangzhou 310006 Zhejiang Peoples R China Hangzhou Normal Univ Affiliated Hosp Hangzhou Peoples R China Hangzhou Normal Univ Dept Neurol Affiliated Hosp Hangzhou Peoples R China

Background: limited clinical prediction models exist to assess the likelihood of acute kidney injury (AKI) occurrence in ischemic stroke individuals. In this retrospective study, our aim was to construct a nomogram that utilizes commonly available clinical features to predict the occurrence of AKI during intensive care unit hospitalization among this patient population. Methods: In this study, the MIMIC-IV database was utilized to investigate potential risk factors associated with the incidence of AKI among ischemic stroke individuals. A predictive nomogram was developed based on these identified risk factors. The discriminative performance of the constructed nomogram was assessed. Calibration analysis was utilized to evaluate the calibration performance of the constructed model, assessing the agreement between predicted probabilities and actual outcomes. Furthermore, decision curve analysis (DCA) was employed to assess the clinical net benefit, taking into account the potential risks and benefits associated with different decision thresholds. Results: A total of 2089 ischemic stroke individuals were included and randomly allocated into developing (n = 1452) and verification cohorts (n = 637). Risk factors for AKI incidence in ischemic stroke individuals, determined through LASSO and logistic regression. The constructed nomogram had good performance in predicting the occurrence of AKI among ischemic stroke patients and provided significant improvement compared to existing scoring systems. DCA demonstrated satisfactory clinical net benefit of the constructed nomogram in both the validation and development cohorts. Conclusions: The developed nomogram exhibits robust predictive performance in forecasting AKI occurrence in ischemic stroke individuals.

关键词： Ischemic stroke Acute kidney injury MIMIC -IV Nomogram Prediction model

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Development of an Interactive Medical Knowledge Graph Based Tool Set

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Procedia Computer Science 2023年 221卷 578-584页

作者： Xiaowei Xu xuwen Wang Meng Wu Hetong Ma liu Shen Jiao li Institute of Medical Information & Library Chinese Academy of Medical Sciences& Peking Union Medical College Beijing 100020 China Key Laboratory of Medical Information Intelligent Technology Chinese Academy of Medical Sciences Beijing 100020 China

The field of clinical research has reached a turning point in terms of the range and diversity of available data and their potential to improve human health and well-being. However, due to discipline-specific variances in terminology and representation, the data is often compartmentalized, disorganized, and inaccessible to a broad audience. In response to these challenges, we designed and evaluated a pilot knowledge graph-based MedKaaS tool capable of integrating existing clinical datasets and translating those data into insights intended to augment human reasoning and accelerate scientific research. In this paper, we present the architecture and performance of our system, which has been applied to several real-world use cases in collaboration with subject-matter specialists. The MedKaaS Tools are actively developed, with regular updates to performance and features. Our future plans include developing a more user-friendly interface and expanding the visualization capabilities for knowledge exploration.

关键词： knowledge graph visualization application programming interface biomedical data

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Preparation of a novel dual structure graded cemented carbides induced by bidirectional diffusion

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MATERIALS LETTERS 2022年 312卷 131689-131689页

作者： Wang, Qiwei He, xuwen li, Na Zhang, Weibin Du, Yong Shandong Univ Key Lab Liquid Solid Struct Evolut & Proc Mat Minist Educ Jinan 250061 Peoples R China Shandong Univ Suzhou Inst Suzhou 215123 Jiangsu Peoples R China China Acad Engn Phys Inst Mat Mianyang 621908 Sichuan Peoples R China Cent South Univ State Key Lab Powder Met Changsha 410083 Hunan Peoples R China

Based on the thermodynamic calculations, a novel dual graded WC-Co-Ti(C, N)-ZrC-HfC cemented carbides was designed and prepared by introducing the combination of spinodal decomposition and denitrification process. The dual graded structures of the cemented carbides have a smooth fcc-rich surface and toughness fcc-free interlayer, which can improve the coating adhesion and inhibit the cracks propagation. Microstructure characterizations and composition distributions elucidated the principle of multi-factors diffusion migration and the formation mechanism of dual structure graded layers.

关键词： Cemented carbides Thermodynamics Sintering Multilayer structure

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Multi-Stage Task Allocation Strategy for Uav Cluster in Multi-Object Tracking

SSRN

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SSRN 2023年

作者： liu, Yunping Niu, Tianyu Zhang, Tingting Sun, xuwen li, liansheng Zhou, li Jiangsu Province Atmospheric Environment and Equipment Technology Collaborative Innovation Center Nanjing University of Information Science and Technology Nanjing210044 China Army Engineering University of PLA Nanjing210001 China Dalian Naval Academy Dalian116018 China Beijing Institute of Control Engineering Beijing100094 China College of Marine Technology and Geomatics Jiangsu Ocean University Lianyungang Jiangsu222005 China

Multi-unarmed aerial vehicle (UAV) collaborative mission planning is a key technology for the intelligent development of UAV clusters at this stage, where mission assignment under multiple constraints is a core part of UAV mission planning technology. The poor planning ability of an UAV swarm often leads to resource waste and revenue reduction during mission execution, while the adoption of task allocation in the multi-target tracking of UAV clusters guarantees the highest profit. Algorithms of traditional pigeon-inspired optimization(PIO) and contract network protocol reflect defects of low timeliness and high time costs, respectively. Compared with these methods, the multilevel PIO algorithm maximizes the efficiency and profitability of the overall tracking task. A staged UAV cluster task allocation architecture was constructed to complete the global optimal initialization before tracking, and then a parallel auction contract network was employed to further perform the local optimal redistribution of each UAV. The simulation results suggest that this scheme not only guides cluster allocation in stages but also decreases the negotiatory time of a UAV cluster to in-crease the integral profitability under multiple constraints, such as prohibited areas. © 2023, The Authors. All rights reserved.

关键词： Profitability

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算法推荐视域下青年主流价值观培育的风险隐忧与优化策略

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廊坊师范学院学报(社会科学版) 2025年第1期41卷 62-69页

作者：石旭雯李睿天津医科大学医学人文学院天津300041 天津医科大学马克思主义学院天津300041

在数字化生存时代,算法推荐作为信息传播和话语生成的新范式,成为形塑青年价值观的社会权力。在资本逻辑作用下,算法推荐的不当运用催生了“过滤气泡”加剧“信息茧房”、“去中心化”加速“再中心化”、“流量至上”诱发“娱乐至死”... 详细信息

在数字化生存时代,算法推荐作为信息传播和话语生成的新范式,成为形塑青年价值观的社会权力。在资本逻辑作用下,算法推荐的不当运用催生了“过滤气泡”加剧“信息茧房”、“去中心化”加速“再中心化”、“流量至上”诱发“娱乐至死”等一系列风险隐忧,给青年群体的价值认知、价值认同和价值选择带来诸多负面影响。为此,必须优化算法推荐生态、创新算法推荐应用、强化算法推荐治理,对算法推荐发展、应用与治理的全过程加以矫治,多措并举,既发挥算法推荐的正向价值,又引领算法、规制算法和驾驭算法,使“算法”成为“善法”。

关键词：算法推荐青年主流价值观风险隐忧优化策略

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