一种低延迟的可扩展调度算法

提出了一种基于阈值的分布式迭代算法。与现有算法不同的是,该算法针对可扩展网络交换调度结构的特点,为处于最高优先级的调度器安排了2次迭代,第1次迭代用阈值方法找出一些较长的VOQ（虚拟输出队列）,并在最高优先级时隙之前的一个时隙完成,以缩短信号的处理时间。仿真结果表明,该算法与现有算法相比,在大流量的uniform流量模式下,延时性能和吞吐率获得了明显的提高。同时,该算法的硬件代价小,有效地实现了性能和复杂度的良好折中。     

输入队列交换的公平可扩展调度系统

提出了一种基于输入队列交换的公平可扩展网络调度系统FSSA.通过将若干个容量较小的调度器合理连接并使其协同工作,构成多端口大容量网络交换调度系统,解决了单个调度器容量和端口数受集成电路工艺限制的问题.FSSA不仅速度高、规模可扩展而且易于硬件实现.环型连接、管线工作及公平调度技术的采用使FSSA在性能方面得到了进一步优化.仿真结果显示,FSSA的性能可与基于iSLIP、DSRR等算法的单片调度器相比拟,尤其在流量较大时,FSSA的性能明显优于单调度器性能.     

多核SoC可扩展性设计技术研究

近年来,使用多核SoC代替传统的单处理器系统,在提高系统并行性方面显示出了巨大的优势.本文在已有层次化总线结构MPSoC的基础上,研究多核SoC原型芯片可扩展性设计问题.在RTL级设计了上述平台,并用FPGA进行原型验证,以流水矩阵乘法为例研究其在不同工作负载下的加速比变化.实验结果表明,在6个处理器的情形下,循环次数为6次时加速比仅为4.10;随着循环次数增多,加速比可达5.48.研究表明多核层次化总线原型芯片的性能提升百分比以及面积增加百分比与处理器数目成正比.可以通过增加处理器的数目来提升MPSoC原型芯片的性能.     

无线Mesh网络的多媒体信息传输

无线Mesh网络(WMN)是一种新型的宽带无线多跳网络,它以覆盖范围广、投资成本低、组网灵活等诸多优点受到广泛的关注。它的业务主要来自因特网,如何在WMN中有效地传输宽带多媒体业务是一个重要的课题。文中分析了WMN传输多媒体业务所存在的问题,并且介绍了基于分级编码的自适应传输在该网络中的应用。     

面向变批量生产的制造资源配置技术研究

变批量生产是一种先进制造模式，根据生产批量，合理调配制造资源，是实现该模式的可行途径。根据建立的制造资源分级数据库，结合目标期望，得到资源的能力和使用成本，将设备与工序之间的配置转化为分配问题，运用“匈牙利算法”得到选配结果，重复使用该法，可以获得多条工艺路线。最后以算例说明方法的可行性。     

Scalable Fabrication of Metallic Nanofiber Network via Templated Electrodeposition for Flexible Electronics

Metallic nanofiber networks (MNFNs) are very promising for next‐generation flexible transparent electrodes (TEs) since they can retain outstanding optical and electrical properties during bending due to their ultralong and submicron profile. However, it is still challenging to achieve cost‐effective and high‐throughput fabrication of MNFNs with reliable and consistent performance. Here, a cost‐effective method is reported to fabricate high‐performance MNFN‐TEs via templated electrodeposition and imprint transfer. The fabricated electrodeposition template has a trilayer structure of glass/indium tin oxide/SiO₂ with nanotrenches in the insulating SiO₂ that can be utilized for repeated electrodeposition of the MNFNs, which are then transferred to flexible substrates. The fabricated TEs exhibit excellent optical transmittance (>84%) and electrical conductivity (<0.9 Ω sq^?1) and show desirable mechanical flexibility with a sheet resistance <2 Ω sq^?1 under a bending radius of 3 mm. Meanwhile, the MNFN‐TEs reproduced from the reusable template show consistent and reliable performance. Additionally, this template‐based method can realize the direct patterning of MNFN‐TEs with arbitrary conductive patterns by selective masking of the template. As a demonstration, a flexible dynamic electroluminescent display is fabricated using TEs made by this method, and the light‐emitting pattern is observable from both sides.     

Scalable Fabrication of Superhydrophobic Coating with Rough Coral Reef-Like Structures for Efficient Self-Cleaning and Oil-Water Separation: An Experimental and Molecular Dynamics Simulation Study

Superhydrophobic coating has a great application prospect in self-cleaning and oil-water separation but remains challenging for large-scale preparation of robust and weather-resistant superhydrophobic coatings via facile approaches. Herein, this work reports a scalable fabrication of weather-resistant superhydrophobic coating with multiscale rough coral reef-like structures by spraying the suspension containing superhydrophobic silica nanoparticles and industrial coating varnish on various substrates. The coral reef-like structures effectively improves the surface roughness and abrasion resistance. Rapid aging experiments (3000 h) and the outdoor building project application (3000 m²) show that the sprayed superhydrophobic coating exhibits excellent self-cleaning properties, weather resistance, and environmental adaptability. Moreover, the combined silica-coating varnish-polyurethane (CSCP) superhydrophobic sponge exhibits exceptional oil-water separation capabilities, selectively absorbing the oils from water up to 39 times of its own weight. Furthermore, the molecular dynamics (MD) simulation reveals that the combined effect of higher surface roughness, smaller diffusion coefficient of water molecules, and weaker electrostatic interactions between water and the surface jointly determines the superhydrophobicity of the prepared coating. This work deepens the understanding of the anti-wetting mechanism of superhydrophobic surfaces from the perspective of energetic and kinetic properties, thereby paving the way for the rational design of superhydrophobic materials and their large-scale applications.     

Scalable Manufacturing of Environmentally Stable All-Solid-State Plant Protein-Based Supercapacitors with Optimal Balance of Capacitive Performance and Mechanically Robust

The development of advanced biomaterial with mechanically robust and high energy density is critical for flexible electronics, such as batteries and supercapacitors. Plant proteins are ideal candidates for making flexible electronics due to their renewable and eco-friendly natures. However, due to the weak intermolecular interactions and abundant hydrophilic groups of protein chains, the mechanical properties of protein-based materials, especially in bulk materials, are largely constrained, which hinders their performance in practical applications. Here, a green and scalable method is shown for the fabrication of advanced film biomaterials with high mechanical strength (36.3 MPa), toughness (21.25 MJ m⁻³), and extraordinary fatigue-resistance (213 000 times) by incorporating tailor-made core–double-shell structured nanoparticles. Subsequently, the film biomaterials combine to construct an ordered, dense bulk material by stacking-up and hot-pressing techniques. Surprisingly, the solid-state supercapacitor based on compacted bulk material shows an ultrahigh energy density of 25.8 Wh kg⁻¹, which is much higher than those previously reported advanced materials. Notably, the bulk material also demonstrates long-term cycling stability, which can be maintained under ambient condition or immersed in H₂SO₄ electrolyte for more than 120 days. Thus, this research improves the competitiveness of protein-based materials for real-world applications such as flexible electronics and solid-state supercapacitors.     

A High-Performance,Tailorable, Wearable,and Foldable Solid-State Supercapacitor Enabled by Arranging Pseudocapacitive Groups and MXene Flakes on Textile Electrode Surface

The challenges of solid-state supercapacitors (SCs) for flexible and wearable electronics still remain in well balancing the electrochemical performance, mechanical stability, and processing technologies. Herein, a high-performance, tailorable and foldable solid-state asymmetric supercapacitor is developed via one-step scalable chemical oxidization and MXene ink painting of N-doped carbon fiber textile (NCFT) substrate. The employed O/N-functionalized NCFT (ONCFT) and MXene materials under opposite potentials both incorporate excellent electrochemical behaviors of carbon-like materials and pseudocapacitive materials, namely high rate capability and pseudocapacitance. By regulating oxidization time and MXene loading, the active layer of MXene decorated NCFT (MNCFT) and ONCFT electrodes analogously present tight skin structure, fundamentally avoiding the risk of active materials detaching from the support during mechanical deformation. As a result, the assembled MNCFT//ONCFT device not only achieves an extended voltage window of 1.6 V, high areal energy density of 277.3 μWh cm⁻² and 90% capacitance retention after 30 000 cycles, but also experiences repeated folding tests. Additionally, the design makes it possible to tailor the textile-based energy storage device (TEESD) into a designed size or shape without impairing its performance for device integration or shape conformable integration. Owing to the whole component fabrication being simple and scalable, the TEESD shows potential practical application.     

一种用于无线局域网可伸缩视频传输的跨层结构与SBED算法*

为了增强802.11e无线局域网上的视频传输质量,提出了一种跨层结构与自适应映射算法。将H.264可伸缩视频编码（SVC）的层次信息与802.11e MAC层的访问类（AC）相结合,基于重要性早期检测（SBED）策略将SVC数据包动态映射到合适的AC上,在基础层损失率与平均重要性损失度间实现良好的平衡。仿真表明,该方案的PSNR性能明显优于现有的静态与随机映射方案。