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逻辑序下自伴算子下确界的谱表示

数学学报（中文版） 2009年第6期52卷 1141-1146页

作者：杜鸿科窦艳妮陕西师范大学数学与信息科学学院西安710062

本文利用线性算子的谱理论给出了逻辑序下两个自伴算子下确界的谱表示.

关键词：自伴算子下确界逻辑序

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Establishing a new testing protocol of the electrochemical stability window for electric double-layer capacitors

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Science China Chemistry 2025年第01期 217-225页

作者： Ruilin Hou Xiaoxi Zhao Tingting Liang Qingyun dou Shan Xu Xingbin yan School of Materials Science and Engineering Sun Yat-sen University Laboratory of Clean Energy Chemistry and Materials Lanzhou Institute of Chemical Physics Chinese Academy of Sciences College of Engineering and Applied Sciences Nanjing University Center of Industrial Analysis and Testing Guangdong Academy of Science

The electrochemical stability window(ESW) is crucial for determining the energy density of electric double-layer capacitors(EDLCs). However, current ESW testing protocols of EDLCs are strongly affected by artificial factors, thereby leading to unreliable result. To solve this problem, we first identify the key shortcomings of the traditional protocols by analyzing their test principles. Subsequently, taking an aqueous carbon-based EDLC as an example, we design a side reaction descriptor to represent the response difference in the charging capacitance to side reactions between the cyclic voltammetry and galvanostatic chargedischarge methods. With the aid of this descriptor, we propose a new ESW testing protocol, which is not only able to completely avoid the adverse influence of subjective factors but also fully consider the operating condition limitations. The protocol can be extended from the single electrode to the full device. This work proposes a more rigorous definition of ESW and provides a reliable protocol for evaluating the ESW of EDLCs.

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以“融合式教学”推进高校思政课高质量发展的价值意蕴和实践理路

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黑龙江高教研究 2025年第1期43卷 104-111页

作者：任艳妮西安财经大学陕西西安710100

在教育数字化时代,高校思政课必然从线上线下“混合”式教学走向“融合”式教学阶段。数字化技术促发了高校思政课“融合式教学”新样态,将网络云课堂、线下专题教学课堂、翻转课堂、“克隆班”异地一同步课堂、社会大课堂等五大“融合... 详细信息

在教育数字化时代,高校思政课必然从线上线下“混合”式教学走向“融合”式教学阶段。数字化技术促发了高校思政课“融合式教学”新样态,将网络云课堂、线下专题教学课堂、翻转课堂、“克隆班”异地一同步课堂、社会大课堂等五大“融合式教学”新样态引入高校思政课改革,具有助力思政课教学向智能化、全景化、精准化与个性化迈进,促进思政课发展环境和整体生态发生转变的价值意蕴。坚持以学生为中心,差异性、个性化教学,技术服务于教学的实践原则,以内生机制保障“融合式教学”可持续发展的实践路径,不断提高思政课实效性,推进高校思政课高质量发展。

关键词：高校思政课 “融合式教学” 高质量发展实践理路

Deciphering the role of ultra-low-loaded rhodium in niFe-MIL-53 for superior oxygen evolution reaction

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Journal of Energy Chemistry 2025年第1期100卷 77-86页

作者： Jinzhi Jia Jinhua Zhang Kailu Guo Lanyue Zhang Gening Du Hao You Junfeng Huang Mudong Tu Hua Li Yong Peng Wei dou Cailing Xu State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering School of Materials and Energy Lanzhou University College of Chemistry and Chemical Engineering Luoyang Normal University

Designing highly active and stable electrocatalysts of oxygen evolution reaction （OER） is one of the crucial *** this study,a novel OER electrocatalyst,niFe-MIL-53 modified with ultra-low rhodium（Rh@niFe-MIL-53）,is successfully prepared via the hydrothermal ***-situ Raman spectroscopy and electrochemical impedance spectroscopy reveal that the doped Rh accelerates the phase transformation of niFe-MIL-53 and the in-situ formed Rh@niFeOOH is the actual active *** importantly,the enhanced reversibility of electrochemical reconstruction between niFeOOH and niFe（OH）2after doping Rh is beneficial for improving the electrochemical stability of the catalyst.X-ray photoelectron spectroscopy spectra show the strong electronic interaction between single-atom Rh and ni/Fe in Rh@***,theoretical calculations confirm that the integration of single-atom Rh into the niFeOOH successfully reduces the band gap,regulates the d-band center （εd）,accelerates the charge transfer,and optimizes the adsorption behavior of oxygen-containing intermediates,thereby lowering the energy barrier of rate-determining ***,the optimized Rh@niFe-MIL-53 exhibits excellent OER activity （240 mV） with a small Tafel slope of 48.2 mV dec-1and long-term durability (over1270 h at 10 m A cm-2and 110 h at 200 mA cm-2).This work presents a new perspective on designing highly efficient OER electrocatalysts.

关键词： X ray photoelectron spectroscopy

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

Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 517-532页

作者： Kaili Zhang Yuefeng yan Zhen Wang Guansheng Ma Dechang Jia Xiaoxiao Huang Yu Zhou State Key Laboratory of Precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： Electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching

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个体因素对大学生在线合作学习英语的影响研究

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林区教学 2025年第1期 75-80页

作者：倪菲菲张艳广东技术师范大学外国语学院广州510665 广东技术师范大学国际教育学院广州510665

合作学习作为借助移动设备进行在线学习的重要组成部分,对促进在线英语学习成效具有积极作用。通过问卷调查方式,从合作态度和合作实施两个维度调查大学生在线合作学习英语的现状,并探讨个体因素(性别和英语水平)对大学生在线合作学习... 详细信息

合作学习作为借助移动设备进行在线学习的重要组成部分,对促进在线英语学习成效具有积极作用。通过问卷调查方式,从合作态度和合作实施两个维度调查大学生在线合作学习英语的现状,并探讨个体因素(性别和英语水平)对大学生在线合作学习英语的影响。研究对象为广东某高校365名大一学生。研究结果表明:学生对在线合作学习英语的态度较为积极,且能较好地开展在线合作学习;在合作态度方面,性别对于积极态度没有影响,但是在消极态度方面,男女呈现出显著差异,女生对于在线合作学习英语的态度更积极;合作实施方面,女生在“个人责任”方面的表现优于男生,高水平学生在“人际和小组技能”方面稍好于低水平学生。

关键词：大学生合作学习性别英语水平

The unique immune evasion mechanisms of the mpox virus and their implication for developing new vaccines and immunotherapies

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Virologica Sinica 2024年第5期39卷 709-718页

作者： Dong Fang yan Liu dou dou Bin Su Department of Health Sciences National Natural Science Foundation of ChinaBeijing100085China Beijing Key Laboratory for HIV/AIDS Research Beijing Youan HospitalCapital Medical UniversityBeijing100069China Central Laboratory Beijing Youan HospitalCapital Medical UniversityBeijing100069China

Mpox is an infectious and contagious zoonotic disease caused by the mpox virus(MPXV),which belongs to the genus *** 2022,MPXV has posed a signiﬁcant threat to global public *** emergence of thousands of cases across the Western Hemisphere prompted the World Health Organization to declare an *** extensive coevolutionary history of poxviruses with humans has enabled these viruses to develop sophisticated mechanisms to counter the human immune ***ﬁcally,MPXV employs unique immune evasion strategies against a wide range of immunological elements,presenting a considerable challenge for treatment,especially following the discontinuation of routine smallpox vaccination among the general *** this review,we start by discussing the entry of the mpox virus and the onset of early infection,followed by an introduction to the mechanisms by which the mpox virus can evade the innate and adaptive immune *** caspase-1 inhibitory proteins and a PKR escape-related protein have been identiﬁed as phylogenomic hubs involved in modulating the immune environment during the MPXV *** respect to adaptive immunity,mpox viruses exhibit unique and exceptional T-cell inhibition capabilities,thereby comprehensively remodeling the host immune *** viral envelope also poses challenges for the neutralizing effects of antibodies and the complement *** unique immune evasion mechanisms employed by MPXV make novel multi-epitope and nucleic acid-based vaccines highly promising research directions worth ***,we brieﬂy discuss the impact of MPXV infection on immunosuppressed patients and the current status of MPXV vaccine *** review may provide valuable information for the development of new immunological treatments for mpox.

关键词： Immune response Immune evasion Mpox virus(MPXV) Immunopathology DNA sensing

Combined Cloud： A Mixture of Voluntary Cloud and Reserved Instance Marketplace

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Journal of Computer Science & Technology 2016年第6期31卷 1110-1123页

作者： Wei Shen Wan-Chun dou Fan Wu Shaojie Tang Qiang ni State Key Laboratory for Novel Software Technology Nanjing University Nanjing 210046 China Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Information Systems University of Texas at Dallas Texas TX 75080 U.S.A. School of Computing and Communications Lancaster University Lancaster LA1 4WA U.K.

Voluntary cloud is a new paradigm of cloud computing. It provides an alternative selection along with some well-provisioned clouds. However, for the uncertain time span that participants share their computing resources in voluntary cloud, there are some challenging issues, i.e., fluctuation, under-capacity and low-benefit. In this paper, an architecture is first proposed based on Bittorrent protocol. In this architecture, resources could be reserved or requested from Reserved Instance Marketplace and could be accessed with a lower price in a short circle. Actually, these resources could replenish the inadequate resource pool and relieve the fluctuation and under-capacity issue in voluntary cloud. Then, the fault rate of each node is used to evaluate the uncertainty of its sharing time. By leveraging a linear prediction model, it is enabled by a distribution function which is used for evaluating the computing capacity of the system. Moreover, the cost optimization problem is investigated and a computational method is presented to solve the low-benefit issue in voluntary cloud. At last, the system performance is validated by two sets of simulations. And the experimental results show the effectiveness of our computational method for resource reservation optimization.

关键词： voluntary cloud system architecture resource reservation