摘要：针对星载天线无法通过天线罩实现隐身的难题,提出星载无天线罩自隐身天线。通过多模谐振原理并利用差异化激励方法,构建具有单模态宽带隐身、双模态隐身-反射和双模态隐身-辐射特性的多模态电磁超表面,进而设计辐射-隐身一体化天线。实测结果表明,在3.05~4.95 GHz和6.4~10.5 GHz的带外吸收带,实现雷达散射截面(radar cross section,RCS)缩减;在5.7~6.15 GHz的频率区间内轴比低于3 dB,天线的增益为15.3 dBi,所设计的无天线罩一体化隐身圆极化阵列天线具有带外RCS缩减特性和良好的带内圆极化辐射性能。

摘要：在非厄密系统中,调节系统的增益或损耗可以使系统状态从PT对称向PT对称破缺转变,转变过程中存在一个特殊的状态转变点,使得系统本征值和本征态同时简并,该点称为奇异点。奇异点结合超构表面产生了许多有趣的光学现象:不对称传输、拓扑相位、非厄密趋肤效应等。然而引入增益的有源超构表面在实验上很难实现,因此利用系统损耗构建虚拟增益的无源超构表面成为非厄密研究的有力武器。本文将从无源非厄密超构表面奇异点的理论模型、研究进展、具体应用和实验设计4个方面进行综述,并对该领域未来的发展方向进行展望。

摘要：利用分布参数法,对用于100 W@2 K低温系统的绕管翅式负压换热器和板翅式负压换热器进行了设计,质量流量为5 g/s。以液氦出口温度、换热效率和壳程压降作为设计指标,初步确定了两种型式的换热器尺寸。利用数值模拟的方式对该设计结果进行了校核,发现数值模拟与设计计算在换热计算上吻合较好,但在阻力计算上并不匹配。设计尺寸下,绕管翅式换热器性能指标为2.239 K、82.6%和68.12 Pa;板翅式换热器的性能指标为2.278 K、81.59%和77.49 Pa。

摘要：在超导线圈性能测试实验中,失超检测系统是探究超导线圈失超特性的主要装置。由于线圈失超时的直流高压会危害整个检测系统的安全性,且实验现场电磁环境复杂,为了确保检测系统的安全可靠运行,设计了一款低功耗且具备信号预处理功能的集成化高压隔离设备。该设备选用delta-sigma(Δ-Σ)调制器作为高压隔离器件并搭配STM32F103主控芯片、MAX292滤波芯片等模拟器件,实现对直流高压的隔离和对输入信号的预处理。设备通过RS485协议与上位机通讯,获取信号调理参数。

摘要：花瑶挑花纹样造型多样、设计精巧,具有较高的美学价值与应用价值,但将其创新应用至箱包设计领域的相关研究却相对较少。从设计学角度出发,分析花瑶挑花的典型图案和文化内涵,归纳其核心元素特征;调查研析消费人群及其风格偏好,确立产品的设计定位;选取典型挑花纹样,运用形状文法和风格迁移算法分别进行创新再造设计,并结合3D数字化软件将创新方案应用于时尚女包设计中,开发出兼具民族特色和现代形式美感的革制品。通过将数字化技术手段与花瑶挑花纹样皮具的有机结合,既保证了挑花纹样的迭代与创新,又提高了革制品图案设计的创作效率。

摘要：Nanomaterials have garnered recognition for their notable surface effects and demonstration of superior mechanical *** studies on the surface effects of nanomaterials,employing the finite element method,often relied on simplified twodimensional models due to theoretical ***,these simplified models inadequately represent the mechanical properties of nanomaterials and fail to capture the substantial impact of surface effects,particularly the curvature dependence of *** study applies the principle of minimum energy and leverages the Steigmann-Ogden surface theory of nanomaterials to formulate a novel finite element surface element that comprehensively accounts for surface *** conducted an analysis of the stress distribution and deformation characteristics of four typical 2D and 3D nanomaterial *** accuracy of the developed surface element and finite element calculation method was verified through comparison with established *** resulting finite element model provides a robust and compelling scientific approach for accurately predicting the mechanical performance of nanomaterials.

摘要：魔方是融合空间思维、逻辑推理与手脑协调能力的益智游戏，具有极强的趣味性和实践性，有助于学生思维能力的发展。针对智力障碍学生抽象思维能力不足的特点，浙江省嘉善县培智学校设计开发创意魔方课程，通过层级化的课程设计与角色代入、逐级进阶、启迪探究等多维度教学策略，系统提升学生的思维能力，促进学生全面发展。

摘要：人工智能浪潮席卷而来,数字技术不断发展,深刻地改变了营销领域的现状和未来。传统营销理念、策略和手段逐渐被数字化、智能化新趋势取代。在这样的背景下,如何理解数字技术在未来营销中的应用,如何理解数字传播和创意对商业、品牌的赋能,成为学界与业界共同面临的课题。

摘要：In recent years,chiral inorganic nanomaterials have become promising candidates for applications in sensing,catalysis,biomedicine,and *** nanomaterials with an intrinsic chiral structure exhibit intriguing geometry‑dependent optical chirality,which benefits the combination of plasmonic characteristics with *** advances in the biomolecule‑directed geometric control of intrinsically chiral plasmonic nanomaterials have further provided great opportunities for their widespread applications in many emerging technological *** this review,we present the recent progress in biosensing using chiral inorganic nanomaterials,with a particular focus on electrochemical and enzyme‑mimicking catalytic *** paper commences with a review of the basic tenets underlying chiral nanocatalysts,incorporating the chiral ligand‑induced mechanism and the architectures of intrinsically chiral ***,it methodically expounds upon the applications of chiral nanocatalysts in the realms of electrochemical biosensing and enzyme‑mimicking catalytic biosensing ***,it proffers a prospective view of the hurdles and prospects that accompany the deployment of chiral nanoprobes for nascent biosensing *** rational design of the chiral nanoprobes,it is envisioned that biosensing with increasing sensitivity and resolution toward the single‑molecule level can be achieved,which will substantially promote sensing applications in many emerging interdisciplinary areas.

摘要：跨学科主题学习是《义务教育课程方案和课程标准(2022年版)》的新要求,对于强化课程协同育人功能具有重要意义。主题是引领跨学科主题学习的组织中心,它主要指要点、中心思想与主要观点,表明学习的关键内容,是将分散的信息整合到一起的“粘合剂”,是跨学科主题学习得以实现的重要保证。通过以学生为中心,基于学生生活的整合设计;以社会为中心,立足热点议题的延伸设计;以教材为中心,聚焦重叠资源的关联设计;以课标为中心,围绕交叉目标内容的融通设计四条路径开展主题设计,可为跨学科主题学习奠定良好基础。