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土壤元素失衡是导致高寒草甸退化的重要诱因

生态学杂志 2020年第8期39卷 2574-2580页

作者：刘敏孙经国徐兴良中国科学院地理科学与资源研究所北京100101 中国科学院大学资源与环境学院北京101408 北京林业大学林学院北京100083

土壤元素失衡是造成高寒草甸退化的关键诱因,明晰其过程与机制是高寒草甸生态系统可持续利用和退化草地恢复的重要内容。以我国典型青藏高原高寒草甸生态系统为研究对象,选取围封1年样地作为短期恢复、围封6年样地作为中期恢复及围封15... 详细信息

土壤元素失衡是造成高寒草甸退化的关键诱因,明晰其过程与机制是高寒草甸生态系统可持续利用和退化草地恢复的重要内容。以我国典型青藏高原高寒草甸生态系统为研究对象,选取围封1年样地作为短期恢复、围封6年样地作为中期恢复及围封15年样地作为长期恢复阶段,分析了这些样地的土壤基本理化性质。研究发现,退化高寒草甸的恢复未改变土壤pH,但增大了土壤保水能力和电导率。土壤有机碳和全氮含量随恢复进程变化敏感,而磷含量的变化并不明显,随着恢复时间的增加土壤C∶N,C∶P和N∶P显著升高,土壤可利用氮素特别是铵态氮的供应能力得到显著提升,长期恢复阶段的土壤铵态氮含量为短期恢复阶段的3.1倍。退化草地的恢复大幅度增加了高寒草甸生态系统地上生物量,这进一步增加了植物对土壤中的碳和氮输入,使土壤中的碳氮周转变快,诱发了植物-土壤之间的正反馈,形成良性循环,使退化草甸得以改善。本研究从退化高寒草甸恢复角度初步证实,土壤碳氮与磷元素比例失衡是造成高寒草地退化的重要诱因,研究结果对高寒草地的养护管理以及退化高寒草地的恢复工作具有重要意义。

关键词：有机碳氮磷养分高寒草甸退化恢复养分失衡

Optimization Strategies of Na_(3)V_(2)(PO_(4))_(3) Cathode Materials for Sodium‑Ion Batteries

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Nano-Micro Letters 2025年第2期17卷 204-251页

作者： Jiawen Hu Xinwei Li Qianqian liang Li xu Changsheng Ding Yu Liu Yanfeng Gao School of Materials Science and Engineering Shanghai UniversityShanghai 200444People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China

Na_(3)V_(2)(PO_(4))_(3)(NVP)has garnered great attentions as a prospective cathode material for sodium-ion batteries(SIBs)by virtue of its decent theoretical capacity,superior ion conductivity and high structural ***,the inherently poor electronic conductivity and sluggish sodium-ion diffusion kinetics of NVP material give rise to inferior rate performance and unsatisfactory energy density,which strictly confine its further application in ***,it is of significance to boost the sodium storage performance of NVP cathode *** to now,many methods have been developed to optimize the electrochemical performance of NVP cathode *** this review,the latest advances in optimization strategies for improving the electrochemical performance of NVP cathode material are well summarized and discussed,including carbon coating or modification,foreign-ion doping or substitution and nanostructure and morphology *** foreign-ion doping or substitution is highlighted,involving Na,V,and PO_(4)^(3−)sites,which include single-site doping,multiple-site doping,single-ion doping,multiple-ion doping and so ***,the challenges and prospects of high-performance NVP cathode material are also put *** is believed that this review can provide a useful reference for designing and developing high-performance NVP cathode material toward the large-scale application in SIBs.

关键词： Sodium-ion batteries Na_(3)V_(2)(PO_(4))_(3) Cathode materials Electrochemical performance Optimization strategies

Multi-model ensemble learning for battery state-of-health estimation:Recent advances and perspectives

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Journal of Energy Chemistry 2025年第1期100卷 739-759页

作者： Chuanping Lin Jun xu Delong Jiang Jiayang Hou Ying liang Zhongyue Zou xuesong Mei State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Shaanxi Key Laboratory of Intelligent Robots School of Mechanical Engineering Xi'an Jiaotong University Department of Electrical Engineering and Automation Luoyang Institute of Science and Technology School of Mechanical Engineering Hangzhou Dianzi University

The burgeoning market for lithium-ion batteries has stimulated a growing need for more reliable battery performance monitoring. Accurate state-of-health(SOH) estimation is critical for ensuring battery operational performance. Despite numerous data-driven methods reported in existing research for battery SOH estimation, these methods often exhibit inconsistent performance across different application scenarios. To address this issue and overcome the performance limitations of individual data-driven models,integrating multiple models for SOH estimation has received considerable attention. Ensemble learning(EL) typically leverages the strengths of multiple base models to achieve more robust and accurate outputs. However, the lack of a clear review of current research hinders the further development of ensemble methods in SOH estimation. Therefore, this paper comprehensively reviews multi-model ensemble learning methods for battery SOH estimation. First, existing ensemble methods are systematically categorized into 6 classes based on their combination strategies. Different realizations and underlying connections are meticulously analyzed for each category of EL methods, highlighting distinctions, innovations, and typical applications. Subsequently, these ensemble methods are comprehensively compared in terms of base models, combination strategies, and publication trends. Evaluations across 6 dimensions underscore the outstanding performance of stacking-based ensemble methods. Following this, these ensemble methods are further inspected from the perspectives of weighted ensemble and diversity, aiming to inspire potential approaches for enhancing ensemble performance. Moreover, addressing challenges such as base model selection, measuring model robustness and uncertainty, and interpretability of ensemble models in practical applications is emphasized. Finally, future research prospects are outlined, specifically noting that deep learning ensemble is poised to advance ens

关键词： Contrastive Learning

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浆液对破碎岩体强度恢复影响试验研究

煤炭技术 2016年第3期35卷 92-94页

作者：周斌许兴亮阳煤集团五矿山西阳泉045200 中国矿业大学矿业工程学院江苏徐州221008

破碎泥质岩体注浆加固过程中,由于注浆水灰比的不同,使得不同浆液析水率对受注泥质岩体强度的恢复不同。为此,对完整岩体和破碎岩体注浆胶结岩体试件进行单轴抗压测试。结果表明,注水泥浆液胶结后的强度为胶结前破碎岩石强度的2～5倍,... 详细信息

破碎泥质岩体注浆加固过程中,由于注浆水灰比的不同,使得不同浆液析水率对受注泥质岩体强度的恢复不同。为此,对完整岩体和破碎岩体注浆胶结岩体试件进行单轴抗压测试。结果表明,注水泥浆液胶结后的强度为胶结前破碎岩石强度的2～5倍,超细水泥浆液注浆后强度为破碎岩石强度的7～12倍,且破碎泥岩胶结试件的抗压强度随水灰比的增大而减小。

关键词：破碎岩体注浆加固岩体强度水灰比

小纪汗煤矿工作面顶板破断结构对巷道矿压影响规律研究

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煤炭学报 2017年第2期42卷 308-314页

作者：许兴亮田素川李俊生茅献彪中国矿业大学矿业工程学院江苏徐州221116 中国矿业大学深部煤炭资源开采教育部重点实验室江苏徐州221116 中国矿业大学深部岩土力学与地下工程国家重点实验室江苏徐州221116

针对我国西部矿区脆性煤体上覆厚层基本顶条件下二次采动时巷道围岩整体变形大与支护结构失效的工程难题,运用理论分析和现场实测的研究方法,对巷道上方基本顶破断结构及由此带来的巷道变形规律进行了研究。以工作面基本顶侧向破断的关... 详细信息

针对我国西部矿区脆性煤体上覆厚层基本顶条件下二次采动时巷道围岩整体变形大与支护结构失效的工程难题,运用理论分析和现场实测的研究方法,对巷道上方基本顶破断结构及由此带来的巷道变形规律进行了研究。以工作面基本顶侧向破断的关键块为研究对象,详细分析了巷道上方基本顶结构由一次采动时的固支悬臂梁结构转变为二次采动时的双拱结构而带来的煤柱中的应力演化规律,给出了基本顶侧向破断长度与煤层厚度、基本顶力学特性、上覆载荷和区段煤柱参数的量化关系式,得出了不同破断结构下煤柱载荷的表达式。结果表明:工作面超前段基本顶侧向断裂形成的"双拱"铰接结构是造成该类巷道矿压显现剧烈的主要控制原因,不合理的区段煤柱宽度会诱发叠加应力作用,导致巷道整体变形与支护结构失效。研究结果可为相似工程条件下巷道围岩控制和合理区段煤柱的留设提供借鉴。

关键词：基本顶结构中等煤柱演化规律叠加应力

Recent Advances in Fibrous Materials for Hydroelectricity Generation

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Nano-Micro Letters 2025年第2期17卷 109-133页

作者： Can Ge Duo xu Xiao Feng xing Yang Zheheng Song Yuhang Song Jingyu Chen Yingcun Liu Chong Gao Yong Du Zhe Sun Weilin xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123People’s Republic of China National Engineering Laboratory for Modern Silk Soochow UniversitySuzhou 215123People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123People’s Republic of China Department of Electrical and Computer Engineering University of MassachusettsAmherstMA 01003USA Department of Materials Imperial College LondonSouth Kensington CampusLondon SW72AZUK College of Textile Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai 201418People’s Republic of China

Depleting fossil energy sources and conventional polluting power generation pose a threat to sustainable *** generation from ubiquitous and spontaneous phase transitions between liquid and gaseous water has been considered a promising strategy for mitigating the energy *** materials with unique flexibility,processability,multifunctionality,and practicability have been widely applied for fibrous materials-based hydroelectricity generation(FHG).In this review,the power generation mechanisms,design principles,and electricity enhancement factors of FHG are first ***,the fabrication strategies and characteristics of varied constructions including 1D fiber,1D yarn,2D fabric,2D membrane,3D fibrous framework,and 3D fibrous gel are ***,the advanced functions of FHG during water harvesting,proton dissociation,ion separation,and charge accumulation processes are analyzed in ***,the potential applications including power supply,energy storage,electrical sensor,and information expression are also ***,some existing challenges are considered and prospects for future development are sincerely proposed.

关键词： Hydroelectricity Fibrous material Streaming potential Ion diffusion

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无汞锌锰糊式电池的研发及产业化

电池 2006年第6期36卷 441-442页

作者：白云徐星亮杨林重庆电池总厂重庆401120

以硼化合物与季胺盐形成复合型缓蚀剂,取代传统的有毒、有害缓蚀剂———HgCl2。以MgCl2和NH4Cl为主,辅以少量ZnCl2,组成新的三组分电解液体系,取代传统的ZnCl2和NH4Cl两组分电解液体系。电池内含汞量低于无汞电池1×10-4%的要求,达到... 详细信息

以硼化合物与季胺盐形成复合型缓蚀剂,取代传统的有毒、有害缓蚀剂———HgCl2。以MgCl2和NH4Cl为主,辅以少量ZnCl2,组成新的三组分电解液体系,取代传统的ZnCl2和NH4Cl两组分电解液体系。电池内含汞量低于无汞电池1×10-4%的要求,达到国家有关部门的要求。复合型缓蚀剂的缓蚀效果和电池的性能均达到GB8897.2-2005标准要求。电池厂采用该技术已生产上亿只R20和R14型糊式电池;该技术在行业内具推广前景、良好的环保和社会效益。

关键词：无汞锌锰糊式电池硼化合物季胺盐氯化镁

Resting-state brain network remodeling after different nerve reconstruction surgeries:a functional magnetic resonance imaging study in brachial plexus injury rats

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Neural Regeneration Research 2025年第5期20卷 1495-1504页

作者： Yunting Xiang Xiangxin xing xuyun Hua Yuwen Zhang Xin xue Jiajia Wu Mouxiong Zheng He Wang Jianguang xu School of Rehabilitation Science Shanghai University of Traditional Chinese MedicineShanghaiChina Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation Ministry of EducationShanghaiChina Department of Rehabilitation Medicine Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Department of Traumatology and Orthopedics Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghaiChina Institute of Science and Technology for Brain-Inspired Intelligence Fudan UniversityShanghaiChina Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence(Fudan University) Ministry of EducationShanghaiChina Human Phenome Institute Fudan UniversityShanghaiChina

Distinct brain remodeling has been found after different nerve reconstruction strategies,including motor representation of the affected ***,differences among reconstruction strategies at the brain network level have not been *** study aimed to explore intranetwork changes related to altered peripheral neural pathways after different nerve reconstruction surgeries,including nerve repair,endto-end nerve transfer,and end-to-side nerve ***–Dawley rats underwent complete left brachial plexus transection and were divided into four equal groups of eight:no nerve repair,grafted nerve repair,phrenic nerve end-to-end transfer,and end-to-side transfer with a graft sutured to the anterior upper ***-state brain functional magnetic resonance imaging was obtained 7 months after *** independent component analysis algorithm was utilized to identify group-level network components of interest and extract resting-state functional connectivity values of each voxel within the *** in intra-network resting-state functional connectivity were compared among the *** muscle reinnervation was assessed by behavioral observation(elbow flexion)and *** results showed that alterations in the sensorimotor and interoception networks were mostly related to changes in the peripheral neural *** repair was related to enhanced connectivity within the sensorimotor network,while end-to-side nerve transfer might be more beneficial for restoring control over the affected limb by the original motor *** thalamic-cortical pathway was enhanced within the interoception network after nerve repair and end-to-end nerve *** areas related to cognition and emotion were enhanced after end-to-side nerve *** study revealed important brain networks related to different nerve *** networks may be potential targets for enhancing motor recovery.

关键词： brain functional networks end-to-end nerve transfer end-to-side nerve transfer independent component analysis nerve repair peripheral plexus injury resting-state functional connectivity

Small extracellular vesicles derived from human induced pluripotent stem cell-differentiated neural progenitor cells mitigate retinal ganglion cell degeneration in a mouse model of optic nerve injury

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Neural Regeneration Research 2025年第2期20卷 587-597页

作者： Tong Li Hui-Min xing Hai-Dong Qian Qiao Gao Sheng-Lan xu Hua Ma Zai-Long Chi State Key Laboratory of Ophthalmology Optometry and Visual ScienceEye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina

Several studies have found that transplantation of neural progenitor cells(NPCs)promotes the survival of injured ***,a poor integration rate and high risk of tumorigenicity after cell transplantation limits their clinical *** extracellular vesicles(sEVs)contain bioactive molecules for neuronal protection and *** studies have shown that stem/progenitor cell-derived sEVs can promote neuronal survival and recovery of neurological function in neurodegenerative eye diseases and other eye *** this study,we intravitreally transplanted sEVs derived from human induced pluripotent stem cells(hiPSCs)and hiPSCs-differentiated NPCs(hiPSC-NPC)in a mouse model of optic nerve *** results show that these intravitreally injected sEVs were ingested by retinal cells,especially those localized in the ganglion cell *** with hiPSC-NPC-derived sEVs mitigated optic nerve crush-induced retinal ganglion cell degeneration,and regulated the retinal microenvironment by inhibiting excessive activation of *** analysis further revealed that hiPSC-NPC derived sEVs transported neuroprotective and anti-inflammatory miRNA cargos to target cells,which had protective effects on RGCs after optic nerve *** findings suggest that sEVs derived from hiPSC-NPC are a promising cell-free therapeutic strategy for optic neuropathy.

关键词： exosome miRNA neural progenitor cell neurodegeneration neuroinflammation neuroprotection optic nerve crush optic neuropathy retinal ganglion cell small extracellular vesicles