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Magnetically-responsive phase change thermal storage materials:Mechanisms,advances,and beyond

Journal of Energy Chemistry 2025年第2期101卷 485-510页

作者： yan gao yang Li Jinjie Lin Panpan Liu Xiao Chen Ge Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule & Structure Construction School of Materials Science and Engineering University of Science and Technology Beijing School of Physics and Astronomy Beijing Normal University Shunde Graduate School University of Science and Technology Beijing

Rapid advances in thermal management technology and the increasing need for multi-energy conversion have placed stringent energy efficiency requirements on next-generation shape-stable composite phase change materials(PCMs).Magnetically-responsive phase change thermal storage materials are considered an emerging concept for energy storage systems,enabling PCMs to perform unprecedented functions(such as green energy utilization,magnetic thermotherapy,drug release,etc.).The combination of multifunctional magnetic nanomaterials and PCMs is a milestone in the creation of advanced multifunctional composite ***,a timely and comprehensive review of composite PCMs based on magnetic nanoparticle modification is still ***,we furnish an exhaustive exposition elucidating the cutting-edge advancements in magnetically responsive composite *** delve deeply into the multifarious roles assumed by distinct nanoparticles within composite PCMs of varying dimensions,meticulously scrutinizing the intricate interplay between their architectures and thermophysical ***,we prognosticate future research trajectories,delineate alternative stratagems,and illuminate prospective *** review is intended to stimulate broader academic interest in interdisciplinary fields and provide valuable insights into the development of next-generation magnetically-responsive composite PCMs.

关键词： Magnetic nanoparticles Magnetic-thermal conversion Phase change materials Response mechanism Thermal energy storage

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Mass organic matter accumulation induced by rapid redox variations in lakes:Evidence from the Miaoxi area,Bohai Bay Basin,China

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Journal of Palaeogeography 2025年第01期14卷 291-313页

作者： Peng Sun Hai-Feng yang Fei-Long Wang Jun-Pei Yue yan-Fei gao You-Jun Tang School of Petroleum Engineering Yangtze University Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of Education Yangtze University Tianjin Branch of China National Offshore Oil Corporation College of Resource and Environment Yangtze University

The Member 4 of the Paleogene Shahejie Formation(Es4) in the Bohai Bay Basin is interspersed with a set of high-quality source rocks typified as intercalation of red and black mudstones. A large amount of petroleum(crude oil) originates from these source rocks. The Paleocene-Eocene Thermal Maximum(PETM)event occurred during the deposition of Es4 in the Bohai Bay Basin, and the organic matter enrichment model under this event is worth further investigation due to its relationship with and influence on petroleum accumulations. Well LK25-A, as the first oil exploration well drilled into the Es4 in Miaoxi area, serves as a valuable case to study organic matter accumulation. In this study, we integrate total organic carbon(TOC),Rock-Eval pyrolysis, microscopic observation, vitrinite reflectance(VRo), elemental analysis, and gas chromatography-mass spectrometry(GC-MS) to evaluate the hydrocarbon generation potential, organic matter types, thermal maturity, and sedimentary environment of the Es4 in Miaoxi area. The analysis of maceral and rock pyrolysis data reveals that Type I and Type II organic matter make up the majority of Paleogene mudstones in this region. The TOC and rock pyrolysis data show that mudstones in this area have high organic matter abundance and oil-generation potential. The measured vitrinite reflectance distribution of mudstone samples, which ranges from 0.3% to 0.74%, demonstrates that the Paleogene strata are at the immature to mature stage, and the samples from this area contain a sizable amount of bituminite and mineralbituminous groundmass. The analysis of biomarkers in the mudstone samples indicates that most of the mudstones in this area are in lacustrine and brackish-hypersaline lacustrine environment under a reducing condition, and some of the red mudstones in the Es4 are formed under a suboxic condition. Based on the size and morphology of the pyrite framboid, the redox conditions of the water mass during deposition or diagenesis are further

关键词： Hydrocarbon generation potential Biomarkers Optical microscopy Pyrite framboid Elemental geochemistry Red–black beds

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Unveiling solid-solid contact states in all-solid-state lithium batteries:An electrochemical impedance spectroscopy viewpoint

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Journal of Energy Chemistry 2025年第2期101卷 16-22页

作者： Jin-Liang Li Liang Shen Zi-Ning Cheng Jun-Dong Zhang Ling-Xuan Li Yu-Tong Zhang yan-Bin gao Chunli Guo Xiang Chen Chen-Zi Zhao Rui Zhang Qiang Zhang Tsinghua Center for Green Chemical Engineering Electrification Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical Engineering Tsinghua University College of Materials Science and Engineering Taiyuan University of Technology Advanced Research Institute of Multidisciplinary Science School of Materials Science and Engineering Beijing Institute of Technology Beijing Huairou Laboratory Institute for Carbon Neutrality Tsinghua University Shanxi Research Institute for Clean Energy Tsinghua University

All-solid-state lithium batteries（ASSLBs） are strongly considered as the next-generation energy storage devices for their high energy density and intrinsic *** solid-solid contact between lithium metal and solid electrolyte plays a vital role in the performance of working ASSLBs,which is challenging to investigate quantitatively by experimental *** work proposed a quantitative model based on the finite element method for electrochemical impedance spectroscopy simulation of different solid-solid contact states in *** the assistance of an equivalent circuit model and distribution of relaxation times,it is discovered that as the number of voids and the sharpness of cracks increase,the contact resistance Rcgrows and ultimately dominates the battery *** accurate fitting,inverse proportional relations between contact resistance Rcand（1-porosity） as well as crack angle was *** contribution affords a fresh insight into clarifying solid-solid contact states in ASSLBs.

关键词： All-solid-state lithium batteries Distribution of relaxation times Electrochemical impedance spectroscopy Equivalent circuit model Finite element method Solid-solid contacts

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Based on non-targeted metabolomics for differential components screening of Rosae Chinensis Flos and Rosae Rugosae Flos and their quality evaluation

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Traditional Medicine Research 2025年第2期10卷 1-15页

作者： Xu Liang Ni-Hui Zhang Zhi-Lai Zhan Guang-Lu Chang yan gao Xia Li Wen-Yuan gao School of Pharmaceutical Science and Technology Faculty of MedicineTianjin UniversityTianjin 300193China State Key Laboratory for Quality Ensurance and Sustainable Use of Dao-di Herbs China Academy of Chinese Medical SciencesBeijing 100700China Key Laboratory of Modern Chinese Medicine Resources Research Enterprises Tianjin 300402China

Background:Rosa chinensis *** Rosa rugosa *** not only of ornamental value,but also edible flowers and the flower buds have been listed in the Chinese Pharmacopoeia as traditional *** two plants have some differences in efficacy,but the flower buds are easily confused for similar *** addition,large-scale cultivation of ornamental rose flowers may lead to a decrease in the effective components of medicinal ***,it is necessary to study the chemical composition and make quality evaluation of Rosae Chinensis Flos(Yueji)and Rosae Rugosae Flos(Meigui).Methods:In this study,40 batches of samples including Meigui and Yueji from different regions in China were collected to establish high-performance liquid chromatography ***,the fingerprints data was analyzed using principal component analysis,hierarchical cluster analysis,and partial least squares discriminant analysis analysis chemometrics to obtain information on intergroup differences,and non-targeted metabolomic techniques were applied to identify and compare chemical compositions of samples which were chosen from groups with large *** compounds were screened by orthogonal partial least-squares discriminant analysis and S-plot,and finally multi-component quantification was performed to comprehensively evaluate the quality of Yueji and ***:The similarity between the fingerprints of 40 batches roses and the reference print R was 0.73 to 0.93,indicating that there were similarities and differences between the *** principal component analysis and hierarchical cluster analysis of fingerprints data,the samples from different origins and varieties were intuitively divided into four *** least-squares discriminant analysis analysis showed that Meigui and Yueji cluster into two categories and the model was reliable.A total of 89 compounds were identified by high resolution mass spectrometry,mainly were flavonoids and flavon

关键词： Rosa chinensis Jacq. Rosa rugosa Thunb. metabolomics chemometrics multiple component quantification quality evaluation

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“人智协同”的粮食全产业链节粮减损能力提升机制构建研究

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粮油食品科技 2025年第1期33卷 263-271页

作者：郑成功高艳中粮米业(盐城)有限公司江苏盐城224000 常州工学院江苏常州213032

为推进中国式粮食产业现代化发展,核心之一必须有效降低粮食全产业链粮食损失和浪费的难题,形成具有中国特色的粮食全产业链节粮减损的能力提升机制。以中粮集团为案例,深入剖析其在粮食全产业链节粮减损领域的实践工作。首先,探索构建... 详细信息

为推进中国式粮食产业现代化发展,核心之一必须有效降低粮食全产业链粮食损失和浪费的难题,形成具有中国特色的粮食全产业链节粮减损的能力提升机制。以中粮集团为案例,深入剖析其在粮食全产业链节粮减损领域的实践工作。首先,探索构建“人智协同”的新流程,将其应用于大语言模型和扎根理论方法结合的编码中。其次,通过“人智协同”对案例资料进行编码,对其结果进行分析,在此基础上,从归纳能力和演绎能力判别三个主流大模型作为“智”在开放式编码、主轴式编码和选择性编码的优势和劣势。最后,基于“人智协同”的初次结果,再次充分发挥“人”的抽象思维、逻辑推理和系统观等能力,构建出粮食全产业链开放式编码、主轴式编码和选择性编码的最终结果,并从各环节构建粮食全产业链节粮减损能力提升机制的理论逻辑,从而形成具有中国特色的粮食全产业链节粮减损新机制。

关键词：粮食全产业链节粮减损人智协同扎根理论大语言模型

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复合材料加筋板-钢板连接结构的力学性能研究

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兵器材料科学与工程 2025年第1期48卷 75-80页

作者：璩媛媛高燕郑州升达经贸管理学院建筑工程学院河南郑州451191

建筑结构在长期使用中面临着材料老化、强度衰减等问题,这不仅威胁着建筑物的结构安全,还影响其使用寿命,给人们的生命财产安全带来潜在风险。为提升建筑结构的安全性、可靠性,推动新材料与新技术的应用,开展建筑用复合材料加筋板-钢板... 详细信息

建筑结构在长期使用中面临着材料老化、强度衰减等问题,这不仅威胁着建筑物的结构安全,还影响其使用寿命,给人们的生命财产安全带来潜在风险。为提升建筑结构的安全性、可靠性,推动新材料与新技术的应用,开展建筑用复合材料加筋板-钢板连接结构的力学性能研究。将加筋板和钢板用两种不同方式连接成1、2两种结构样品,再分别用粘接+螺栓(结构1-A、2-A)、焊接+螺栓(结构1-B、2-B)加固连接,得到4个试样。用万能试验机测试其拉伸强度、剪切强度,并在不同热处理条件下对试样的剪切强度与弯曲强度进行测量。结果表明:结构2-B的载荷-位移曲线更高,拉伸强度更优,剪切强度相对更高。相比于结构1-A、结构2-A,1-B、2-B由于用焊接+螺栓加固,在高温下的剪切强度与弯曲强度较好,且结构2-B优势更大,力学性能更优。

关键词：建筑用复合材料加筋板-钢板连接结构力学性能拉伸强度

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基于混合语义的切片级智能合约重入漏洞检测

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计算机工程与应用 2025年第1期61卷 321-329页

作者：江姝晨牛保宁高彦太原理工大学计算机科学与技术学院山西晋中030600

针对现有基于深度学习的漏洞检测方法主要集中在源代码的单一表现形式上,无法完全捕获源代码中包含的丰富语义信息和结构信息,以及大多数方法基于函数粒度,检测样本存在大量与漏洞无关的冗余代码导致检测精度下降的问题,聚焦于智能合约... 详细信息

针对现有基于深度学习的漏洞检测方法主要集中在源代码的单一表现形式上,无法完全捕获源代码中包含的丰富语义信息和结构信息,以及大多数方法基于函数粒度,检测样本存在大量与漏洞无关的冗余代码导致检测精度下降的问题,聚焦于智能合约最严重的漏洞之一,即重入漏洞,提出一种基于混合语义的切片级智能合约重入漏洞检测方法SCHyVulDect。根据漏洞特征关键字对智能合约进行切片操作,获得合约切片;构建合约切片的代码图,通过图注意力网络(graph attention network,GAT)提取其深层语义信息。并使用双向长短期记忆网络(bidirectional long-short term memory,Bi-LSTM)和注意力机制,提取切片代码的上下文序列特征,将提取的图结构特征和序列特征进行融合,从而进行漏洞检测。实验结果表明,SCHyVulDect检测重入漏洞的精确率、召回率和F1值分别为96.36%、94.45%、91.70%,比现有的基于深度学习的智能合约漏洞检测方法的精确率提高13.03~18.00个百分点,具有较好的检测效果。

关键词：区块链智能合约漏洞检测图注意力网络混合语义

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电动汽车混合储能系统双判据多模式功率分配策略

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现代电力 2025年第1期42卷 176-182页

作者：邵雨晴张红娟高妍太原理工大学电气与动力工程学院山西省太原市030024

针对混合储能系统中电池和超级电容的功率分配问题,提出双判据多模式功率分配策略。以电动汽车的动力学模型为基础,综合直流母线功率和超级电容荷电状态两项参数,动态调整混合储能系统的工作模式;参考储能系统效率模型,调整电池和超级... 详细信息

针对混合储能系统中电池和超级电容的功率分配问题,提出双判据多模式功率分配策略。以电动汽车的动力学模型为基础,综合直流母线功率和超级电容荷电状态两项参数,动态调整混合储能系统的工作模式;参考储能系统效率模型,调整电池和超级电容的给定功率,实现混合储能系统的功率分配。搭建混合储能系统实验平台,开展电动汽车工况模拟和功率分配策略研究。实验结果表明:与采用固定比例功率分配策略相比,使用双判据多模式功率分配策略可将电池输出功率的均值和峰值分别降低16.98%和24.72%,并且将混合储能系统的能量利用率提升5.35%。

关键词：混合储能系统功率分配策略电动汽车电池超级电容

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Possible coexistence of superconductivity and topological electronic states in 1T-RhSeTe

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CHINESE PHYSICS B 2025年第2期34卷 111-116页

作者： Zhang, Tengdong Fan, Rui gao, yan Wu, yanling Xu, Xiaodan Yao, Dao-Xin Li, Jun yanshan Univ Sch Sci Hebei Key Lab Microstruct Mat Phys Qinhuangdao 066004 Peoples R China Sun Yat Sen Univ Sch Phys State Key Lab Optoelect Mat & Technol Guangdong Prov Key Lab Magnetoelectr Phys & Device Guangzhou 510275 Peoples R China

Transition metal dichalcogenides (TMDs), exhibit a range of crystal structures and topological quantum states. The 1T phase, in particular, shows promise for superconductivity driven by electron-phonon coupling (EPC), strain, pressure, and chemical doping. In this theoretical investigation, we explore 1T-RhSeTe as a novel type of TMD superconductor with topological electronic states. The optimal doping structure and atomic arrangement of 1T-RhSeTe are constructed. Phonon spectrum calculations validate the integrity of the constructed doping structure. The analysis of the electron-phonon coupling using the electron-phonon Wannier (EPW) method has confirmed the existence of a robust electron-phonon interaction in 1T-RhSeTe, resulting in total EPC constant lambda = 2.02, the logarithmic average frequency omega log = 3.15 meV and Tc = 4.61 K, consistent with experimental measurements and indicative of its classification as a BCS superconductor. The band structure analysis revealed the presence of Dirac-like band crossing points. The topological non-trivial electronic structures of the 1T-RhSeTe are confirmed via the evolution of Wannier charge centers (WCCs) and time-reversal symmetry-protected topological surface states (TSSs). These distinctive properties underscore 1T-RhSeTe as a possible candidate for a topological superconductor, warranting further investigation into its potential implications and applications.

关键词： superconductivity topological electronic state transition metal dichalcogenides 74.70.-b 63.20.kd 73.20.At 74.62.Dh 71.15.Mb

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电动汽车多参数模型预测制动能量跟踪策略

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汽车技术 2025年第1期 20-25页

作者：张巍高妍张红娟太原理工大学太原030024

针对电机制动能量回收率低和直流母线电压波动大的问题,提出了考虑电机功率、双向DC/DC变换器效率、超级电容电压等多个参数实时调整超级电容电流参考值的制动能量跟踪策略。采用储能单元的离散状态空间模型预测超级电容的电流和电压,... 详细信息

针对电机制动能量回收率低和直流母线电压波动大的问题,提出了考虑电机功率、双向DC/DC变换器效率、超级电容电压等多个参数实时调整超级电容电流参考值的制动能量跟踪策略。采用储能单元的离散状态空间模型预测超级电容的电流和电压,并结合系统中多个参数计算超级电容的电流参考值。使用基于比例积分(PI)的电流环控制超级电容电流实时跟踪参考值,实现超级电容对电机能量的跟踪。通过仿真分析和对比试验,结果表明:所提出的策略能够将制动能量的回收效率由55.93%提升至86.76%,直流母线的电压波动范围抑制在0.9%以内。

关键词：状态空间模型双向DC/DC 变换器制动能量跟踪

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