摘要：Conjugated polymers exhibit exceptional adaptability in flexible thin-film transistors,owing to their inherent flexibility and high charge ***,achieving conjugated polymers that demonstrate both high mobility and stability under mechanical stress,such as bending or stretching,remains a significant *** this study,we synthesized an ethylene-bridged conjugated polymer,PDPPVIDT,derived from methyl-side diketopyrrolopyrrole(DPP)and indacenodithiophene(IDT)aldehydes,using an environmentally friendly Knoevenagel condensation reaction under mild conditions,resulting in a moderate yield with promising *** characterization techniques revealed enhanced backbone planarity with stableπ-πstacking,while thin films of PDPPVIDT displayed a nearamorphous nature due to the conformational isomerism of the ethylene *** structure enables simultaneous charge transport and ***,flexible organic thinfilm transistor(OTFT)devices based on PDPPVIDT demonstrated excellent hole mobility(μh)reaching up to 1.70 cm^(2) V^(−1) s^(−1),along with high mechanical bending *** work underscores the potential of vinyl-bridged donor-acceptor conjugated polymers,highlighting the industrial adaptability of their production process and offering new insights for the design and synthesis of future flexible electronic materials.

摘要：阐述了压缩感知信号稀疏化模型、测量矩阵构造、重构算法设计、压缩检测和压缩感知硬件信号处理系统的演变过程,提出压缩感知理论未来发展需要解决函数序列处理问题,包括解决函数序列信号稀疏化,函数序列信号的测量矩阵构造,测量矩阵的压缩检测(compressed measurement,CM)约束条件,以及降低压缩感知(compressed sensing,CS)硬件系统的复杂度等问题。针对目前压缩感知理论应用中复杂度高、压缩检测算法准确度低的问题,提出了一种伪随机信号动态电能量值的精确同步压缩检测方法,该方法复杂度低,易于硬件实现,研发的硬件实验装置测量误差优于2×10^(-4),为提高压缩检测算法准确度提供了一种解决策略,具有高准确度动态电能测量应用前景。

摘要：飞轮储能设备的快速充放电特性使其非常适用于解决新能源并网所造成的能量波动问题。现阶段的飞轮储能设备多是小容量轻载型设备,以储能量100 kWh、10000 r/min的调频大容量重载飞轮储能设备为设计目标,对该设备的关键转子支撑部件电磁轴承进行设计。基于100 kWh的重载飞轮转子的承载力要求,分别设计了径向、轴向电磁轴承,仿真验证电磁力与磁感应强度等参数,并对承载力进行仿真分析与验证,同时研究了等效刚度下的重载飞轮转子的固有频率与临界转速,分析不同支撑刚度对重载飞轮转子固有频率的影响。结果表明所设计的重载电磁轴承能够满足100 kWh大容量重载飞轮储能设备的运行要求。

摘要：CO_(2)管道输送是实现碳规模化、长距离输送的重要途径,是推进碳捕集、利用与封存产业发展,实现“双碳”目标的关键技术。为探究CO_(2)管道输送过程中的相变及流动参数演化规律,指导CO_(2)输送管道设计和运行管理,该文设计并搭建了一种CO_(2)可视化环道实验装置,可实现对CO_(2)管道稳态输送及泄放等瞬态工况的准确模拟。为验证装置可靠性,开展了气相、超临界相CO_(2)管道泄放实验,获取了管内温度与压力、相态变化及其耦合规律。该装置具有测量精度高、安全性强及操作方便等优点,不仅适用于CO_(2)管道输送领域的科研测试,也可用于可视化教学实验。

摘要：在线社交媒体的普及为人们通信带来便利,但也为谣言滋生创造条件,设计高效的谣言检测方法能保护人民财产和维持社会稳定.已有方法主要集中在利用谣言传播中的丰富信息来检测谣言,这些方法在长期谣言检测具有优越性能,但应对早期谣言检测的效果不佳.针对这些方法无法在谣言传播早期获得丰富信息的问题,本文提出了一种背景知识增强的多特征融合谣言检测方法来提高早期谣言检测性能.首先,从知识图谱和维基百科中挖掘谣言背景知识并建立知识关联图来补充源推文的语义信息;其次,为了解决现有方法难以学习具有不同差异性噪声的谣言传播表示的问题,本文设计了一种基于加性注意力和点积注意力的图神经网络结构对谣言进行插值学习;最后,将知识关联图、谣言传播-扩散图以及社交图的表示进行结合,构建出具有多通道输入的谣言检测器架构,从而实现早期谣言的精准分类.实验结果表明,本文方法在3个公开数据集上的准确率分别达到了87.3、90.4%和87.0%,与其它对比方法相比,具有更高的早期谣言检测准确率和长期谣言检测准确率.

摘要：针对滚动轴承的故障诊断与分类,提出了一种基于自适应噪声完全集合经验模态分解(CEEMDAN)、模糊测度熵(FME)和粒子群优化算法-概率神经网络(PSO-PNN)的故障诊断方法。首先,CEEMDAN被用于分解振动信号,由于自适应噪声的加入,分解效果得到最大改善。其次,基于FME,对包含故障的模式进行特征提取。最后,将特征向量输入到经过PSO优化的PNN中进行故障分类,优化后的PNN具有更准确的分类精度。通过实验案例验证,该方法的诊断能力得到验证,且分别与使用经验模态分解(EMD)和集合EMD(EEMD)分解方法进行对比,进一步体现了该方法的优越性。

摘要：Fraction repetition(FR)codes are integral in distributed storage systems(DSS)with exact repair-by-transfer,while pliable fraction repetition codes are vital for DSSs in which both the per-node storage and repetition degree can easily be adjusted *** paper introduces a new type of pliable FR codes,called absolute balanced pliable FR(ABPFR)codes,in which the access balancing in DSS is ***,the equivalence between pliable FR codes and resolvable transversal packings in combinatorial design theory is *** constructions of pliable FR codes and ABPFR codes based on resolvable transversal packings are presented.

摘要：本教学探索聚焦于“概率论与数理统计”课程,深入剖析课程教学现状及痛点问题。将试验设计方法融入教学过程,阐述其与概率论及数理统计知识的紧密联系,涵盖试验设计基本原则、常用方法及其在课程中的应用实例。同时引入大数据子抽样技术,详细说明其原理、方法步骤,并结合课程知识点通过实例展示其作用。经教学实践检验,这些举措有效提升学生学习效果、实践能力与创新思维,为课程教学改革提供有益参考。This teaching exploration focuses on the course “Probability Theory and Mathematical Statistics”, and deeply analyzes the current situation and pain points of the course teaching. This paper integrates the experimental design method into the teaching process, explains its close connection with probability theory and mathematical statistics, and covers the basic principles of experimental design, common methods, and their application examples in the course. At the same time, the big data subsampling technology is introduced, its principles, methods, and steps are explained in detail, and its role is demonstrated through examples in combination with the course knowledge points. Through the test of teaching practice, these measures can effectively improve students’ learning effectiveness, practical ability, and innovative thinking and provide a useful reference for curriculum and teaching reform.

摘要：We study the self-diffusion of adatom on Pt(100) surface by molecular dynamics. The metal is modeled by the surface embedded-atom potential. Besides the conventional concerted exchange mechanism, a new exchange mechanism in which an ad-dimer diffuses by a concerted motion of three atoms is observed. The importance is that it could become a dominant diffusion mechanism in some cases.

摘要：逆水煤气变换(RWGS)反应不仅能够实现CO_(2)转化,也是该转化过程生产CO的关键步骤,开发高效的RWGS催化剂具有重要意义。MoO_(3)具有一定的RWGS催化活性,但存在CO_(2)转化率低、活化反应温度偏高等问题。Cu具有良好的CO_(2)催化加氢活性,常作为CO_(2)加氢催化剂的活性相,在RWGS领域具有良好的应用前景。利用共沉淀法制备了Cu/MoCe、Cu/MoTi和Cu/MoGa催化剂,通过表征分析和活性测试对催化剂的物化性质及构效关系进行了探究。结果表明,在反应温度为500℃、n(H_(2)):n(CO_(2))为4:1和空速为30000 mL/(g·h)时,Cu/MoCe催化剂活性相对最高,CO收率为47.9%。Cu/MoCe催化剂中更小的固溶体相CuMoO4晶粒尺寸、载体中形成的Ce-O-Mo不对称氧空位、Ce^(3+)/Ce^(4+)离子对之间的氧化还原循环,以及氧空位与活性相之间的协同作用共同促进了RWGS反应,使Cu/MoCe催化剂展现出较好的催化活性,为RWGS催化剂设计提供了新思路。