203 research outputs found
More than Vanilla Fusion: a Simple, Decoupling-free, Attention Module for Multimodal Fusion Based on Signal Theory
The vanilla fusion methods still dominate a large percentage of mainstream
audio-visual tasks. However, the effectiveness of vanilla fusion from a
theoretical perspective is still worth discussing. Thus, this paper reconsiders
the signal fused in the multimodal case from a bionics perspective and proposes
a simple, plug-and-play, attention module for vanilla fusion based on
fundamental signal theory and uncertainty theory. In addition, previous work on
multimodal dynamic gradient modulation still relies on decoupling the
modalities. So, a decoupling-free gradient modulation scheme has been designed
in conjunction with the aforementioned attention module, which has various
advantages over the decoupled one. Experiment results show that just a few
lines of code can achieve up to 2.0% performance improvements to several
multimodal classification methods. Finally, quantitative evaluation of other
fusion tasks reveals the potential for additional application scenarios
Gas-Purged Headspace Liquid Phase Microextraction System for Determination of Volatile and Semivolatile Analytes
In order to achieve rapid, automatic, and efficient extraction for trace chemicals from samples, a system of gas-purged headspace liquid phase microextraction (GP-HS-LPME) has been researched and developed based on the original HS-LPME technique. In this system, semiconductor condenser and heater, whose refrigerating and heating temperatures were controlled by microcontroller, were designed to cool the extraction solvent and to heat the sample, respectively. Besides, inert gas, whose gas flow rate was adjusted by mass flow controller, was continuously introduced into and discharged from the system. Under optimized parameters, extraction experiments were performed, respectively, using GP-HS-LPME system and original HS-LPME technique for enriching volatile and semivolatile target compounds from the same kind of sample of 15 PAHs standard mixture. GC-MS analysis results for the two experiments indicated that a higher enrichment factor was obtained from GP-HS-LPME. The enrichment results demonstrate that GP-HS-LPME system is potential in determination of volatile and semivolatile analytes from various kinds of samples
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