摘要：针对物联网环境下人机交互的需求,提出了一种基于电容传感器的手势识别装置设计方案。该装置采用模块化架构,包括数据采集、数据处理、手势识别和物联网通信等功能模块。通过高精度ADC、自适应采样率调整、复合滤波、DCNN-LSTM神经网络等技术,实现了对6种典型手势的实时、高精度识别。实验结果表明,该装置的平均识别精度达98.5%,响应时延低至16.4ms,具有良好的应用前景。

摘要：传统数控车床在上下料过程中主要依靠人工操作,工人劳动强度大、生产效率低。为解决这一问题,研究了卧式数控车床自动上下料装置的设计。根据数控车床的具体参数和加工要求,设计了机械手爪、桁架机械手等关键部件,通过Solidworks建立三维模型。采用三菱FX3U-48MT型PLC构建控制系统。通过静力测试、模态测试和运行效率测试验证了装置性能,旨在提供高效、稳定的卧式数控车床上下料自动化解决方案。

摘要：随着汽车工业的快速发展,现有喷涂机器人在复杂曲面车身喷涂中存在诸多不足。基于此,本文提出一种串并联喷涂机器人设计方案,结合串联和并联机构的优点克服现有喷涂机器人的局限性。设计了喷涂机器人的机械结构,详细分析了其驱动方式、控制系统。通过逆运动学、正运动学仿真,验证了机器人设计的合理性,旨在提高汽车喷涂效率,满足复杂曲面车身喷涂需求。

摘要：AI大模型的流行在全球范围内掀起了一股人工智能投资、创新、应用浪潮。本文先从产业政策体系视角出发,将产业人才培育、产业技术研发、产业安全打造、产业生态建设等纳入分析框架,构建了推动美国AI大模型发展的产业政策分析框架。目前,中国AI大模型产业发展取得了一系列成就,包括推动AI大模型发展的政策设计日渐完善、国内AI大模型的数量和类型日渐丰富、AI大模型的用户数量和适用场景日见增多。但是在技术短板、人才错配、生态建设、国际合作等方面均存在一系列短板与缺点,从而造成了相关产业发展的滞后。为此,需要系统性加大对人工智能的研发投入、积极培育和引进人工智能人才、努力构建人工智能生态系统、全面推进人工智能领域的国际合作,以推动我国AI大模型产业政策体系重塑,进一步实现产业快速发展。

摘要：为了分析风扇转子叶片前缘侵蚀对压缩系统不同内外涵工况气动特性的影响,通过多级联算数值分析了某型大涵道比发动机压缩系统气动特性变化。研究结果表明,在峰值效率点工况下,前缘侵蚀后的发动机压缩系统总压比、等熵效率和通道流量分别相对下降0.18%、0.879%和0.972%。对风扇转子叶片而言,前缘侵蚀导致外涵道近喘点工况下95%叶高处表面静压系数曲线轴向0~24%区间的斜率下降,静压降低,轴向24%~40%区间的斜率上升,使叶型负荷降低,增压能力下降,激波向前移动。此外,前缘侵蚀会使外涵道近喘点处整体风扇叶片的攻角增大2°左右,导致叶片气动效率和失速裕度产生变化,偏离原始叶型设计。

摘要：目的 针对新博物馆学带来的教育适儿化和功能数字化压力,探索博物馆融合文创产业和数字科技发挥儿童非遗美育职能的新方法。方法 选取津派花丝为研究对象,针对其传承和消费现状,说明数字技术介入文创产业对非物质文化遗产“以馆为媒”降低目标观众年龄门槛的必要性。参考国内外博物馆实践智慧,探索在情境化、自由式、游戏化学习理论指导下,博物馆数字化收藏展示、教育及服务、衍生品开发诸功能服务于儿童认知体验津派花丝本位基因的具体路径。结果 提出展陈空间数字化、跨次元平台传播知识、求知过程游戏化几个创意视角,辅助津派花丝利用数字媒体增强自身美学与技艺的在场性、交互性。结论 博物馆文创数字化促进了教育职能转型至更具情境化、建构性、娱乐性的儿童中心范式,拓展地方非遗的参与人群和目标受众至少儿群体。

摘要：To resolve problems of complicated clutter, fast-varying scenes, and low signal-clutterratio （SCR） in application of target detection on sea for space-based radar （SBR）, a target detection approach based on adaptive waveform design is proposed in this paper. Firstly, complicated sea clutter is modeled as compound Gaussian process, and a target is modeled as some scatterers with Gaussian reflectivity. Secondly, every dwell duration of radar is divided into several sub-dwells. Regular linear frequency modulated pulses are transmitted at Sub-dwell 1, and the received signal at this sub-dwell is used to estimate clutter covariance matrices and pre-detection. Estimated matrices are updated at every following sub-dwell by multiple particle filtering to cope with fast-varying clutter scenes of SBR. Furthermore, waveform of every following sub-dwell is designed adaptively according to mean square optimization technique. Finally, principal component analysis and generalized likelihood ratio test is used for mitigation of colored interference and property of constant false alarm rate, respectively. Simulation results show that, considering configuration of SBR and condition of complicated clutter, 9 dB is reduced for SCR which reliable detection requires by this target detection approach. Therefore, the work in this paper can markedly improve radar detection performance for weak targets.

摘要：随着网络媒体的迅速发展,网络广告大有取代传统媒体广告的趋势,但是,其法律规制却相对滞后,各国对网络广告的法律定位及立法模式尚未形成统一的认识。由于某些网络广告的基本理论问题尚未得到解决,目前我国网络广告的法律监管仍然处于一个较低的水平,从而直接影响了广告法律、法规的执行。为此,应借鉴电子商务发达国家的实践经验,尽快完善我国网络广告主体法律制度。

摘要：城市电影通常以写实主义风格为主,描绘城市生活场景、表现人物情感、揭示社会现象和价值观。其画面和声音元素都要忠于现实但绝不是简单的再现,而是经过艺术修饰的表现。以当代城市为背景的电影洋溢着各种亲切而熟悉的时代情绪,从而较容易使观众产生共鸣而沉浸在电影情境中。本文从电影声音设计的角度,分直达时代灵魂的言语、勾起时代回忆的音响和激发时代情感的音乐三个部分,具体分析本世纪中国城市电影如何运用声音元素展现时代色彩。

摘要：SRAM(static random access memory)-based FPGA(field programmable gate array), owing to its large capacity, high performance, and dynamical reconfiguration, has become an attractive platform for So PC(system on programmable chip) development. However, as the configuration memory and logic memory of the SRAM-based FPGA are highly susceptible to SEUs(single-event upsets) in deep space, it is a challenge to design and implement a highly reliable FPGA-based system for spacecraft, and no practical architecture has been proposed. In this paper, a new architecture for a reliable and reconfigurable FPGAbased computer in a highly critical GNC(guidance navigation and control) system is proposed. To mitigate the effect of an SEU on the system, multi-layer reconfiguration and multi-layer TMR(triple module redundancy) techniques are proposed, with a reliable reconfigurable real-time operating system(Space OS) managing the system level fault tolerance of the computer in the architecture. The proposed architecture for the reconfigurable FPGA-based computer has been implemented with COTS(commercial off the shelf) FPGA and has firstly been applied to the GNC system of a circumlunar return and reentry flight vehicle. The in-orbit results show that the proposed architecture is capable of meeting the requirements of high reliability and high availability, and can provide the expressive varying functionality and runtime flexibility for an FPGA-based GNC computer in deep space.