摘要：Plasmon induced transparency(PIT)in the transparent window provides new insights into the design of optical filters,switches and storage,and integrated *** slow light effect makes PIT applicable to both sensors and slow light ***,PIT can overcome the diffraction limit of light,which makes it possible to manipulate light on a half-wavelength scale and brings good news to the miniaturization of optical *** this paper,we first summarize the researches of PIT phenomenon based on metal-dielectric-metal(MDM)waveguide systems and analyze the physical mechanisms of PIT including bright-dark mode interactions and phase-coupling-induced ***,we review the applications of PIT in optical sensing,optical filtering,optical switching,slow light devices and optical logic *** last,we outline important challenges that need to be addressed,provide corresponding solutions and predict important directions for future research in this area.

摘要：The problems associated with vibrations of viaducts and low-frequency structural noise radiation caused by train excitation continue to increase in importance.A new floating-slab track vibration isolator-non-obstructive particle damping-phononic crystal vibration isolator is proposed herein,which uses the particle damping vibration absorption technology and bandgap vibration control *** vibration reduction performance of the NOPD-PCVI was analyzed from the perspective of vibration *** paper explores the structure-borne noise reduction performance of the NOPD-PCVIs installed on different bridge structures under varying service conditions encountered in practical engineering *** load transferred to the bridge is obtained from a coupled train-FST-bridge analytical model considering the different structural parameters of *** vibration responses are obtained using the finite element method,while the structural noise radiation is simulated using the frequency-domain boundary element *** the particle swarm optimization algorithm,the parameters of the NOPD-PCVI are optimized so that its frequency bandgap matches the dominant bridge structural noise frequency *** noise reduction performance of the NOPD-PCVIs is compared to the steel-spring isolation under different service conditions.

摘要：Smart multi-stimuli responsive organic materials have become increasingly favored due to their advantages of high stability and easy *** this study,a cyanostilbene derivative((αZ)-2-chloro-α-[(4-methoxyphenyl)methylene]-5-pyridinehyde,TAR)was successfully synthesized,and its polymorphs(TAR-1 and TAR-2)exhibited multiple responsive behaviors under different stimulus ***-1 is supposed to have excellent mechanical properties,while TAR-2 shows fascinating heterotropic photochromism(green-cyan-yellow)under different intensities of ultraviolet(UV)irradiation,which has never been reported in previous *** investigation revealed that this was attributed to different degrees of[2+2]cycloaddition induced by UV *** addition,both polymorphs could be protonated during Trifluoroacetic acid fuming and deprotonate automatically after fuming,accompanied by the significant variation in ***,two scenarios were designed based on their unique stimuli-responsive properties,which proved their promising potential in fields of information security and anti-counterfeiting encryption.

摘要：Digital technology provides a method of quantitative investigation and data analysis for contemporary landscape spatial analysis,and related research is moving from image recognition to digital algorithmic analysis,providing a more scientific and macroscopic way of *** key to refinement design is to refine the spatial design process and the spatial improvement strategy *** the ancient city of zhaoyu in Qixian County,Shanxi Province as an example,(1)based on obtaining the integrated data of the ancient city through the drone tilt photography,the style and landscape of the ancient city are modeled;(2)the point cloud data with spatial information is imported into the point cloud analysis platform and the data analysis is carried out from the overall macroscopic style of the ancient city to the refinement level,which results in the formation of a more intuitive landscape design scheme,thus improving the precision and practicability of the landscape design;(3)Based on spatial big data,it starts from the spatial aggregation level,spatial distribution characteristics and other evaluation index system to achieve the refinement analysis of the *** technology and methods are used throughout the process to explore the refined design path.

摘要：德国麦森是欧洲最先研制出硬质瓷的瓷厂,在欧洲及世界陶瓷史上具有重大里程碑式意义。18世纪初期,奥古斯都二世为建立陶瓷宫殿以及提高麦森瓷厂的制瓷能力,收藏并仿制中国瓷器,麦森的“中国风”陶瓷成为东西方文化融汇的物质载体。本文将文献资料与实物标本二者并重,结合图像学与对比研究的方法,探讨中国瓷器对德国麦森陶瓷的设计影响,从材料与工艺角度阐述麦森瓷厂初期仿制中国瓷器的设计历史,反映中国传统文化的传播,再现东西方审美观念的共鸣,以证中国瓷器对德国麦森瓷厂迅速崛起所起到的影响作用。

摘要：研究目的:银西高铁上阁村隧道穿越董志塬黄土含水层施工中出现的渗涌水,受地下水渗流影响,引起了洞身黄土含水率增加、围岩自稳性变差等问题。为解决上阁村富水黄土隧道施工难题,论文首先分析了上阁村隧道黄土含水层分布特征,其次介绍了地表降水施工辅助措施及其效果,最后应用MIDAS/GTS建立隧道工程群井降水模型,实现了不同流量以及渗透系数工况下的隧道开挖渗流模拟计算。研究结论:(1)上阁村隧道长大段落通过软塑黄土含水层,通过地表降水梳干隧道洞身范围内地下水,提高了隧道洞身黄土围岩稳定性,确保了隧道施工的安全和进度;(2)不同单井流量(80 m^(3)/d、90 m^(3)/d、100 m^(3)/d)的群井数值模拟结果表明,地下水位降深在短时间内达到了设计要求,验证了降水设计参数及效果;(3)本研究可为黄土等低渗透岩体富水隧道工程施工处置及设计提供依据。

摘要：在表情识别任务中由于人脸特征的多样性和不确定性,导致在特征提取阶段容易出现特征缺失以及特征提取率低下等问题,与此同时,在具有特征复用结构的网络训练过程中还会堆积大量冗余特征,从而影响特征质量。针对以上问题,提出了一种基于特征筛选结合改进卷积的残差多尺度特征融合注意力机制模型(residual multiscale feature fusion attentional network,RMFANet)。参考蓝图可分离卷积以及空洞卷积的思想,设计并引入了改进后的卷积形式,从而更有效地将卷积进行分离,提升特征提取效能;在改进后卷积模式的基础上设计并引入了多尺度并行特征提取通路,丰富了特征信息;设计并引入了特征筛选模块,以减少模型训练过程中产生的冗余特征,同时筛选出优质特征,提升特征质量;设计并引入了浅层输入特征处理层,以简化网络结构,降低计算复杂度;引入通道注意力机制,以突出局部关键特征信息;最后引入SMU激活函数,从而提升模型的非线性能力。通过实验结果可以看出,该模型可以在保证较低参数量以及计算成本的前提条件下在Fer2013数据集以及CK+数据集上分别取得70.298%和96.566%的识别准确率,相比较传统算法而言具有更好的鲁棒性。

摘要：针对导弹在三维场景中以期望角度拦截加速度未知的机动目标问题,提出了一种考虑角度约束的三维拦截制导律。首先,建立了三维弹目非线性拦截制导模型;其次,设计了一种全滑动模态的积分滑模面,省去了传统滑模制导律中的滑模趋近阶段,有效地降低了拦截制导过程中的能量消耗;而后,基于设计的积分滑模面和二阶滑模控制理论,在弹目视线法向和侧向上分别设计了一种带角度约束的三维积分二阶滑模拦截制导律,有效地抑制了抖振现象,同时对目标机动造成的未知干扰进行了在线补偿;此外,对所设计算法进行了严格的Lyapunov稳定性数学证明;最后,数值仿真结果验证了本文所提三维拦截制导律的有效性、优越性以及抗干扰的鲁棒性。

摘要：发展数字孪生变压器对支撑电力装备智能运维具有重要价值。目前变压器已具有计算机辅助设计、工程仿真的一般功能,但面向运行维护的场景、性能数字孪生还处于初级阶段。为此,该文提出了一种将计算机辅助设计、工程仿真、制造进一步拓展为电力装备的计算机辅助运维(computer aided maintenance+,CAM+)新模式,包含了场景更新、虚实融合、故障定位、智能运维等功能。该文首先介绍了CAM+的内涵,结合电力装备的数字孪生架构提出了面向数字孪生变压器的CAM+模式的技术架构。然后,综述了3维场景可视化建模、高精度传感、多物理场耦合模型与快速计算、虚实融合的动态推演、多源数据融合、状态智能评估、知识图谱等CAM+模式所涉及的关键技术。最后,分析了CAM+在变压器场景更新、参量孪生和智能运维的应用,并总结了未来CAM+所面临的挑战和发展方向。

摘要：目的现有水上救援设备无法进行多种方式救援,在功能和形式设计上存在不足,且现有的研究对于水域救援设备的评价体系并不完整。方法为实现水上救援方式多元化,完善水域救援设备的设计评价体系,提出将层次任务分析法(HTA)、层次分析法(AHP)、熵权法和PUGH决策模型融合运用在城市水域救援设备设计中。采用HTA对水域救援任务流程进行层次分解和分析,识别任务需求指标,完善水域救援设备设计评价指标体系;应用AHP方法对任务需求指标进行主观权重分析,通过熵权法对指标进行客观权重分析,最终计算综合权重,确定设计方案;利用PUGH模型对设计方案与现有救援设备进行对比评估,评价设计方案的优劣。结果基于HTA方法能够全面分析水域救援任务需求,联合应用AHP和熵权法,能够系统化综合计算指标的权重,更全面地考虑各指标的重要性,结合PUGH模型对比评估,能够有效比较设计方案的优劣。结论为城市水域救援设备的设计提供了一种新的方法,具有较高的实用性和可行性。