The Distributed Feedback (DFB) laser, as one of the common light sources for Cavity Ring-Down Spectroscopy (CRDS) technology, has its output laser wavelength jointly regulated by the temperature of the laser and the c...
详细信息
A novel reconfigurable notch ultra-wideband (UWB) antenna is proposed, which uses a heart-shaped structure as the radiation patch and a quarter-circle ground plane with mirror-symmetric overlapping for achieving excel...
详细信息
This paper demonstrates the concept and modeling of a novel compliant mechanism that can be used as a frictionless bearing to support the linear and rotary motions in high-precision positioning systems. By exploiting ...
详细信息
Raven-ii is a multifunctional surgical robot mainly used for minimally invasive surgery. This article aims to provide innovative ideas for Raven-ii research through simulation verification and finite element analysis....
详细信息
Fizeau interferometry is widely used to measure the surface of optical components and the wavefront aberration of opticalsystems due to common-path configuration, high accuracy and easy implementation. However, due t...
详细信息
Public parks are essential components of urban areas, offering residents recreational spaces while also enhancing the city's climate and ecological systems. In this study, we analyzed the spatial distribution char...
详细信息
This article studies the load optimization configuration problem of optical fiber networks. Firstly, a comprehensive review of existing research achievements and directions was conducted. Then, based on the MC-NSGA-ii...
详细信息
Conjugated macrocycles can exhibit concealed antiaromaticity;that is, despite not being antiaromatic, under specific circumstances, they can display properties typically observed in antiaromatic molecules due to their...
详细信息
Conjugated macrocycles can exhibit concealed antiaromaticity;that is, despite not being antiaromatic, under specific circumstances, they can display properties typically observed in antiaromatic molecules due to their formal macrocyclic 4n pi-electron system. Paracyclophanetetraene (PCT) and its derivatives are prime examples of macrocycles exhibiting this behaviour. In redox reactions and upon photoexcitation, they have been shown to behave like antiaromatic molecules (requiring type I and ii concealed antiaromaticity, respectively), with such phenomena showing potential for use in battery electrode materials and other electronic applications. However, further exploration of PCTs has been hindered by the lack of halogenated molecular building blocks that would permit their integration into larger conjugated molecules by cross-coupling reactions. Here, we present two dibrominated PCTs, obtained as a mixture of regioisomers from a three-step synthesis, and demonstrate their functionalisation via Suzuki cross-coupling reactions. optical, electrochemical, and theoretical studies reveal that aryl substituents can subtly tune the properties and behaviour of PCT, showing that this is a viable strategy in further exploring this promising class of materials.
We design and experimentally demonstrate an efficient fiber-chip edge coupler for NUV using symmetric double-tip taper and MMI-based coupler. We measure the coupling loss down to 2.85 dB at 407 nm on an alumina-on-ins...
详细信息
This paper investigates distributed strategy to improve the control efficiency for unmanned surface vehicles (USVs) in cooperative coexistence. We propose a distributed method of cooperative formation control and navi...
详细信息
暂无评论