电话安全报警系统

介绍一种新的电子安全报警系统,该系统设计将电子探测、电脑控制和电话通讯技术相结合,可形成一个二级组网的防盗、防火、防抢劫系统。     

改进的多层感知机对拟稳点的选取

运用多层感知机对监测网中的相对稳定点（拟稳点）进行选取,克服了传统的剔除粗差的局限性,为监测网的拟稳平差提供精确可靠的拟稳点。对于多层感机不确定的隐层节点的数量做了适当的改进,应用到拟稳点的选取上,其数目可定。给出了一种适合于拟稳点选取的激励函数,而输出层的节点数,将其取决于检验显著水平。     

Bilayer carbon-based structure with the promotion of homogenous nucleation for lithium metal anodes

Lithium metal anodes (LMAs) are considered as the promising alternatives for next-generation high energy density batteries, but are still hampered by the severe growth of uncontrollable lithium dendrites. The growth of lithium dendrites induces poor cycling lifespan and serious safety concerns, dragging lithium metal batteries out of practical applications. We designed a bilayer carbon-based structure covered with Co/C nanosheets and vertical graphene sheets (VGS). The enormous specific surface area and uniformly distributed Co nanoparticles of the CC@Co/C-VGS host are derived from its unique design, which can reduce local current density and nucleation overpotential, resulting in a dendrite-free morphology and exceptional cycling stability. Symmetric cells exhibit over 400 cycles (800 h) at a high current density/capacity of 10 mA cm^?2/10 mA h cm^?2. Full cells using LiFePO₄ as the cathode have an enhanced rate capability and a prolonged lifespan, reaching 90 mA h g^?1 after 1000 cycles at 2 C with 73.5% capacity retention. This unique design sheds light on developing high-performance LMAs.

     

CDMA网络优化浅析

阐述CDMA网络优化需要考虑的几个问题。