13,698 research outputs found
Deep Multimodal Speaker Naming
Automatic speaker naming is the problem of localizing as well as identifying
each speaking character in a TV/movie/live show video. This is a challenging
problem mainly attributes to its multimodal nature, namely face cue alone is
insufficient to achieve good performance. Previous multimodal approaches to
this problem usually process the data of different modalities individually and
merge them using handcrafted heuristics. Such approaches work well for simple
scenes, but fail to achieve high performance for speakers with large appearance
variations. In this paper, we propose a novel convolutional neural networks
(CNN) based learning framework to automatically learn the fusion function of
both face and audio cues. We show that without using face tracking, facial
landmark localization or subtitle/transcript, our system with robust multimodal
feature extraction is able to achieve state-of-the-art speaker naming
performance evaluated on two diverse TV series. The dataset and implementation
of our algorithm are publicly available online
A Compositional Analysis of Unbalanced Usages of Multiple Left-turn Lanes
Lane usage measures distribution of a specific traffic movement across multiple available lanes in a given time. Unbalanced lane usages decrease the capacity of subject segment. This paper took multiple left-turn lanes at signalized intersections as case study, and explored the influences of some factors on the lane usage balance. Lane usages were calculated from field collected lane volumes and the constant-sum constraint among them was explicitly considered in the statistical analysis. Classical and compositional analysis of variance was respectively conducted to identify significant influential factors. By comparing the results of compositional analysis and those of the classical one, the former ones have better interpretability. It was found that left-turn lane usages could be affected by parameter variance of geometric design or traffic control, such as length of turning curve, length of upstream segment, length of signal phase or cycle. These factors could make the lane usages achieve relative balance at different factor levels.</p
Low-carbon optimal dispatch of integrated energy system considering demand response under the tiered carbon trading mechanism
In the operation of the integrated energy system (IES), considering further
reducing carbon emissions, improving its energy utilization rate, and
optimizing and improving the overall operation of IES, an optimal dispatching
strategy of integrated energy system considering demand response under the
stepped carbon trading mechanism is proposed. Firstly, from the perspective of
demand response (DR), considering the synergistic complementarity and flexible
conversion ability of multiple energy sources, the lateral time-shifting and
vertical complementary alternative strategies of electricity-gas-heat are
introduced and the DR model is constructed. Secondly, from the perspective of
life cycle assessment, the initial quota model of carbon emission allowances is
elaborated and revised. Then introduce a tiered carbon trading mechanism, which
has a certain degree of constraint on the carbon emissions of IES. Finally, the
sum of energy purchase cost, carbon emission transaction cost, equipment
maintenance cost and demand response cost is minimized, and a low-carbon
optimal scheduling model is constructed under the consideration of safety
constraints. This model transforms the original problem into a mixed integer
linear problem using Matlab software, and optimizes the model using the CPLEX
solver. The example results show that considering the carbon trading cost and
demand response under the tiered carbon trading mechanism, the total operating
cost of IES is reduced by 5.69% and the carbon emission is reduced by 17.06%,
which significantly improves the reliability, economy and low carbon
performance of IES.Comment: Accepted by Electric Power Construction [in Chinese
Target of Rapamycin Regulates Photosynthesis and Cell Growth in Auxenochlorella pyrenoidosa
Auxenochlorella pyrenoidosa is an efficient photosynthetic microalga with autotrophic growth and reproduction, which has the advantages of rich nutrition and high protein content. Target of rapamycin (TOR) is a conserved protein kinase in eukaryotes both structurally and functionally, but little is known about the TOR signalling in Auxenochlorella pyrenoidosa. Here, we found a conserved ApTOR protein in Auxenochlorella pyrenoidosa, and the key components of TOR complex 1 (TORC1) were present, while the components RICTOR and SIN1 of the TORC2 were absent in Auxenochlorella pyrenoidosa. Drug sensitivity experiments showed that AZD8055 could effectively inhibit the growth of Auxenochlorella pyrenoidosa, whereas rapamycin, Torin1 and KU0063794 had no obvious effect on the growth of Auxenochlorella pyrenoidosa a. Transcriptome data results indicated that Auxenochlorella pyrenoidosa TOR (ApTOR) regulates various intracellular metabolism and signaling pathways in Auxenochlorella pyrenoidosa. Most genes related to chloroplast development and photosynthesis were significantly down-regulated under ApTOR inhibition by AZD8055. In addition, ApTOR was involved in regulating protein synthesis and catabolism by multiple metabolic pathways in Auxenochlorella pyrenoidosa. Importantly, the inhibition of ApTOR by AZD8055 disrupted the normal carbon and nitrogen metabolism, protein and fatty acid metabolism, and TCA cycle of Auxenochlorella pyrenoidosa cells, thus inhibiting the growth of Auxenochlorella pyrenoidosa. These RNA-seq results indicated that ApTOR plays important roles in photosynthesis, intracellular metabolism and cell growth, and provided some insights into the function of ApTOR in Auxenochlorella pyrenoidosa
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