摘要：We propose the concept of thermal demultiplexer, which can split the heat flux in different frequency ranges intodifferent directions. We demonstrate this device concept in a honeycomb lattice with dangling atoms. From the view ofeffective negative mass, we give a qualitative explanation of how the dangling atoms change the original transport *** first design a two-mass configuration thermal demultiplexer, and find that the heat flux can flow into different ports incorresponding frequency ranges roughly. Then, to improve the performance, we choose the suitable masses of danglingatoms and optimize the four-mass configuration with genetic algorithm. Finally, we give out the optimal configuration witha remarkable effect. Our study finds a way to selectively split spectrum-resolved heat to different ports as phonon splitter,which would provide a new means to manipulate phonons and heat, and to guide the design of phononic thermal devices inthe future.

摘要：弯曲河道中截流水流运动规律极为复杂,弯道边界形态和立堵截流布置方式的不同对截流难度均有很大的影响,对弯道中立堵截流龙口水力特性进行分析,有助于了解复杂的水流流态并选择合适的截流方案。本文考虑弯曲河道截流的主要影响因素,以施工水力学为基础,建立弯道截流龙口水流流态和堤头局部水力特性的计算模型,分析弯道相对河宽、弯道弯角和龙口位置对水深和流速变化的影响。分析结果表明弯道截流龙口流速变化有显著的时变差异和位变差异,并给出了龙口相对水深和堤头局部流速随弯道形态的变化关系。最后结合大渡河丹巴水电站河湾上截流的工程案例分析比较,验证了计算模型的可行性和分析结果的适用性,为河湾中截流方案及其截流施工布置型式的选择提供了理论依据。

摘要：Potassium-ion batteries(PIBs)have garnered significant interest due to their abundant resources,wide distribution and low price,emerging as an ideal alternative to lithium-ion batteries for energy storage *** one of the key components,anode materials act as a crucial role in the specific capacity,energy density,power density and service life of PIBs,so it is highly significant to conduct a comprehensive investigation on *** materials are widely employed as the anode for PIBs because of their advantages of environmental friendliness,abundant raw materials and diverse *** to the structural differences,carbon materials are mainly distinguished as crystalline carbon represented by graphite and graphene,and soft carbon and hard carbon existing in amorphous *** types of carbon materials have special ion storage mechanisms,storage capacity and cycling ***,it is meaningful to summarize and discuss the characteristics and research progress in carbon anode materials for PIBs in recent ***,according to the development status and application prospect of graphite,graphene,soft carbon,and hard carbon,we deeply generalize the electrochemical performance and potassium storage *** we dig out the key problems faced by different carbon materials and arrange various modification design and solving strategies of novel carbon ***,we expound the importance of carbon anode materials as the anode and PIBs,explore the application potential of current and emerging carbon anode materials,and put forward some suggestions and prospects for the future development of carbon materials.

摘要：针对目前光动力治疗皮肤癌中光敏剂传递效率低及光穿透深度不足的问题,提出一种用于光动力抗肿瘤的双层微针,双层微针由可溶针尖和不溶基底两部分组成.可溶针尖能够精准地将光敏剂递送至肿瘤组织内部,提高传递效率.针尖溶解后留存在组织内的不溶基底为高能光子提供稳定的光传输通道,增强光穿透深度,以激活深层光敏剂.为设计递送性能及光导性能良好的光动力抗肿瘤双层微针,采用COMSOL Multiphysics软件建立双层微针针尖结构在皮肤组织内的光敏剂扩散模型,研究针尖几何尺寸与药物扩散浓度的关系.同时,基于蒙特卡洛方法建立双层微针基底结构的皮肤黑色素瘤组织光学模型,研究基底几何尺寸对光导性能的影响.最终获得性能最优的双层微针几何尺寸.借助ANSYS Workbench软件建立其力学模型以验证该微针的刺入性能.研究结果表明:本文所设计的光动力抗肿瘤双层微针具备良好的力学性能,能够顺利刺穿皮肤组织,并通过可溶针尖将光敏剂靶向递送至肿瘤部位.不溶基底在肿瘤组织内建立稳定光导路径,有效促进光子传输.该微针设计建立了高效光动力抗肿瘤治疗方案,拓展了肿瘤非手术治疗的新途径.

摘要：表征学习在视听情感识别中是一个备受关注的研究方向,其关键在于构建兼具一致性和差异性的有效情态表征,但如何精准实现情态表征仍面临诸多挑战,因此本文提出一种基于多头交叉注意力机制的跨模态视听情感识别模型。该模型通过多头交叉注意力架构实现融合特征和模态对齐,并采用分段训练策略以应对模态缺失问题。此外,为了保留每个模态的独立信息,本文设计了单模态辅助损失任务并使用了共享参数。最终,在多模态情绪数据集(CREMA-D)上,该模型的宏观和微观F1分数分别达到了84.5%和88.2%。研究结果表明,本文模型能有效地捕获视听模态内和模态间的特征表示,成功解决了单模态和多模态情绪识别框架的统一性问题,为视听情感识别提供了一种全新的解决思路。

摘要：光储电站运行包含光伏功率预测与资源优化调度两部分,通常首先以预测精度最高为目标进行光伏功率预测,再基于预测曲线进行光储电站优化调度。然而,优化调度问题的目标函数值与光伏功率预测误差具有非线性、非对称关系,在相同的预测误差水平下,以精度最高为目标的光伏功率预测结果并不一定使得光储电站运行收益最大。对此,提出了面向光储电站运行收益提升的光伏功率价值导向预测方法。首先,构建包含光伏功率预测与电站运行的双层优化问题,上层为光伏功率日前预测模型训练问题,下层为给定光伏功率预测模型下的光储电站日前投标与日内运行两阶段优化调度问题。然后,将上层预测问题变换为组合预测形式,预测模型参数设置为权重系数,设计了基于迭代优化的预测模型参数求解方法。最后,采用实际光伏电站数据以及电价数据进行算例分析,并与以预测精度最高为目标的光伏功率预测方法进行对比,验证所提出方法在提升电站运行收益方面的有效性。

摘要：在航空航天、高端机床及轨道交通等机械装备领域,金属零部件表面摩擦学性能研究主要集中在涂层、织构和固体润滑剂等方面。单一的摩擦结构已难以满足复杂工况下对摩擦磨损的需求,因此由涂层/织构/固体润滑剂组合构建的摩擦结构成为研究重点。根据减摩耐磨结构形式不同,归纳总结了五类结构形式:基体混合润滑剂型、织构复合润滑剂型、涂层掺杂润滑剂型、织构复合涂层型和涂层织构润滑剂复合型,梳理了五类结构的设计及制备方法,同时探讨了各类结构在摩擦过程中的减摩耐磨机制,并对多种涂层在摩擦结构内发挥的保护作用、织构形状参数对摩擦结构减摩效果的影响规律、不同种类固体润滑剂间掺杂产生的相互影响进行了深入分析。此外,还阐述了各类摩擦结构润滑膜成形机制,归纳了各类摩擦结构在实际应用中的优缺点,总结了涂层/织构/固体润滑剂在摩擦界面中的相互作用机制,以及摩擦结构在多工况下的适应性等关键问题。最后,对开发新型环保可持续摩擦材料、智能润滑涂层及多功能一体界面结构的研究前景进行了展望。

摘要：基于组件的软件开发技术成为当前软件业的热点之一。COM/DCOM为分布式系统提供了一种基于组件模型的标准。本文介绍了用COM/DCOM技术实现MIS开发平台中自定义用户数据库子系统的功能设计。

摘要：随着人们物质生活水平的提升,对城市基础设施建设提出了更高要求。市政给排水管网作为城市基础设施建设中的关键部分,必须强化其管线设计。文章研究了基于BIM技术的市政给排水管线设计路径,在掌握BIM技术内涵的基础上,从管网老化、缺乏全面的监测系统、设计预测不足等三个方面,分析了传统市政给排水管线设计中存在的问题,同时,强调了给排水管线三维建模、三维设计、确定基坑开挖位置、管线碰撞检查等技术应用措施,有助于转变传统市政给排水管线设计模式,实时共享设计参数,提升设计质量,推动市政工程建设行业可持续发展。

摘要：Liver injury is a common cause of drug approval withdrawal during drug development,pre-clinical research,and clinical *** not properly treated,patients with severe liver injury can suffer from acute liver failure or even ***,utilization of the convenient in vitro hepatotoxicity assessment model for early detection of drug-induced hepatotoxicity is vital for drug development and safe personalized ***(e.g.,hydrogels,nanofibers,decellularized liver matrix)and bioengineering technologies(e.g.,microarrays,micropatterns,3D printing,and microfluidics)have been applied for in vitro hepatotoxicity assessment *** review summarizes the structure and functions of the liver as well as the components of in vitro hepatotoxicity assessment *** addition,it highlights the latest advances in developing hepatotoxicity models with the ultimate goal of further clinical translation.