Da Qiu's research while affiliated with Hubei University and other places
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Publications (7)
Unmanned surface vehicles (USVs) often operate in real-world environments with long voyage distances and complex routes. The use of a single-grid map model presents challenges, such as the high computational costs for high-resolution maps and loss of environmental information for low-resolution maps. This article proposes an environmental modeling...
The quality of unmanned surface vehicle (USV) local path planning directly affects its safety and autonomy performance. The USV local path planning might easily be trapped into local optima. The swarm intelligence optimization algorithm is a novel and effective method to solve the path-planning problem. Aiming to address this problem, a hybrid bact...
The optical spectrum of mode-locked lasers can exhibit multiple peaks resulting from different mechanisms such as modulation instability, dispersive waves (DWs), and coupling between continuous waves (CWs) and DWs. The latter was recently reported in a mode-locked fiber laser. Here we show that besides the coupling between single-wavelength CW and...
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Fiber-optic Cherenkov radiation (FOCR) is a promising nonlinear process that is widely used for nonlinear wavelength conversion. In this study, an all-fiber 920-nm femtosecond pulse source is experimentally demonstrated by using Cherenkov radiation. The 4-nJ 150-fs 1550-nm amplified seed pulse source ensures highly efficient 920-nm pulse generation...
Traditional orthogonal frequency division multiplexing (OFDM) transmitter is implemented by exploiting inverse fast Fourier transform (IFFT), up-sampling, and low pass shaping filter (LPSF) modules, which occupy a large number of hardware resources and severely lower down the operation speed. To address these limitations, we propose a novel OFDM tr...
Citations
... Various kinds of operations included in the E-coli foraging behavior named as bacterial foraging optimization (BFO) algorithm. Different stages of BFO [11] is explained as; ...
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... Serving as laser sources in biophotonic systems, UFLs at 0.9 µm has attracted intensive attention due to two significant advantages. First, widely-used fluorescent proteins, especially the enhanced green fluorescent protein (EGFP), present stronger two-photon excitation at this band, therefore, the optical imaging systems based on 0.9-µm UFL could be applied in deep tissue imaging and in vivo dynamic observation [24,25]; Secondly, compared to traditional solid-state lasers, e.g., Ti:sapphire lasers, fiber lasers are superior in terms of beam quality, compactness and robustness and could enhance the reliability, portability and cost-efficiency of bio-imaging systems, which is beneficial for their practically clinical applications [25][26][27]. ...
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![[object Object]](https://i1.rgstatic.net/ii/profile.image/272546050342941-1441991450882_Q64/Shengli-Pugunboshengli.jpg)
... In IoT, we therefore need wireless communication networks that provide low latency, higher bandwidth, and energy consumption as low as possible. Orthogonal Frequency Division Multiplexing (OFDM) has proven itself as an effective multicarrier digital communication technique in the field of wireless communication, such as LTE and 5G [3]. ...
