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Aiming at the issue of insufficient utilization of temporal information, speaker information, and multi-modal information in existing conversational emotion recognition methods, this paper proposed a multi-modal temporal-aware DAG model(MTDAG). The designed temporal-aware unit optimized the discourse weight setting in chronological order and collected historical emotional cues to achieve more effective utilization of temporal and historical information based on recency effect. The context and speaker information fusion module achieved the full utilization of discourse information by extracting the deep joint information of contextual context and speaker self-context. By setting the DAG subgraphs to capture multi-modal information and constrain the interaction direction, the model achieved full utilization of multi-modal information while reducing the introduction of noise. Extensive experiments conducted on two benchmark datasets, IEMOCAP and MELD, demonstrate that the model exhibits excellent performance in emotion recognition. [ABSTRACT FROM AUTHOR]

The research on the blow-up time of solutions to the reaction-diffusion equations has much theoretical significance. Moreover, it is closely related to practical problems such as production safety control, population density control and environmental chemotaxis control. The lower bounds for the blow-up time of solutions to a class of reaction-diffusion equations with gradient terms and nonlocal terms, were considered. Firstly, the region was assumed to be a bounded convex one with smooth boundary in the high-dimensional space. Secondly, through the establishment of suitable auxiliary functions, and with the 1st-order differential inequality and the Sobolev inequality, the lower bounds for the blow-up time were derived for finite-time blow-up occurences. Finally, 2 application examples illustrate the abstract results obtained with this method. [ABSTRACT FROM AUTHOR]

Objectives The Mw 4.9 Le Teil earthquake that occurred on November 11, 2019 is the most destructive earthquake recorded in the Rhône River Valley of France.Methods We first used Sentinel-1 data to calculate the coseismic displacement field of the Le Teil earthquake with the GAMMA software package. We then obtained fault geometric parameters and coseismic displacement fields based on Bayesian inversion and the steepest descent method (SDM). We last quantified the effects of quarry extraction activity on fault by using the digital elevation model (DEM) data acquired in 2000 and 2006—2011. We calculated the extraction volume and the Coulomb stress change on the fault plane based on the Boussinesq solution of three dimension homogeneous and elastic half-space.Results The coseismic displacement field show that the largest displacements in the line of sight of the ascending and descending orbits are 14.9 cm and 8.6 cm, respectively. We find that the seismogenic fault has a southeast dip angle of 72°, a strike of 54° and an average rake of 108°; the earthquake rupture reached the surface, with a rupture area of about 3 413 m×1 358 m, and a depth of about 1.472 km. The slip is over 0.15 m and is concentrated at a depth of 0–0.75 km with a peak slip of 0.2 m. We calculated the geodetic magnitude to be Mw 4.79. The Coulomb stress change on the fault plane is 0.024 MPa in 6–11 years after 2000.Conclusions The rock extraction of the Le Teil quarry had been active during 1833—2019, and the extraction is even more intense after 2007. The Coulomb stress change on the fault plane could reach up to 0.1 MPa, which is much larger than the local tectonic loading rate, suggesting that the Le Teil earthquake is strongly related to rock extraction activities. [ABSTRACT FROM AUTHOR]

This paper is based on the meteorological observation data of the five meteorological stations (Shiquanhe, Gerze, Xianza, Bangoin and Amdo) near Qiangtang National Nature Reserve, the climate of Qiangtang National Nature Reserve from 1960 to 1990 and the estimated grid data in the future issued by IPCC5. The Miami model, Thornthwaite Memorial model, and tendency rate were used. The statistical analysis methods were used to study the spatiotemporal evolution of Net Primary Productivity in Qiangtang National Nature Reserve and its response to climate change. The results showed that: (1) the average annual temperature decreases from the west to the east, and the annual precipitation increases from the west to the east. The annual mean temperature(T) showed a significant increasing trend, while the annual precipitation(R) and annual evapotranspiration(E) showed a slight increasing trend. NPP of Temperature(NPPt) and NPP of precipitation(NPPr) showed a slight increasing trend at all stations, and NPP of evapotranspiration(NPPe) and standard NPP(NPPb) showed a slight increasing trend at most stations. (2) NPPt gradually decreased from the west to the east, NPPr gradually increased from the west to the east, NPPe and NPPb first increased and then decreased from the west to the east. The limiting factor of NPP was precipitation in Shiquanhe station and Gerze station, evapotranspiration in Xianza station and Bangoin station, and evapotranspiration or air temperature in Amdo station. (3) The NPPt, NPPr, NPPe and NPPb in different periods of the 21st century were significantly higher than those in all periods of the 20th century. The NPPt, NPPr, NPPe and NPPb were significantly increased in the future under different emission scenarios compared with those from 1960 to 1990. Under the trend of "warming and wetness" in the past 48 years and in the future, the NPP of vegetation increased, and the increase was larger in the cold and humid area in the southeast, but less in the cold and arid area in the northwest. The future climate is conducive to the improvement of local vegetation NPP and the improvement of local ecological environment. Assessing the possible impact of future climate change on the ecological environment of Qiangtang Plateau. The results not only provide a basic method for studying the Net Primary Productivity of vegetation in no man's land at regional scale, but also have important reference value for estimating ecological security research and ecological function planning. [ABSTRACT FROM AUTHOR]

Various aromatic diamines and dianhydride monomers were selected to synthesize binary or multistructured polyamide acid solutions by solution polymerization, and the corresponding structured polyimide films were prepared by solution casting and thermal amination. The effects of different monomers, compositions, and other factors on the properties of polyimide were explored by testing and characterizing the structures and properties of polyamide acid (PAA) and polyimide (PI). This experiment is based on industrial practice, which is consistent with the process of industrial research and development. Encouraging students to deeply understand the relationship between the structure and performance of polymer materials can stimulate their innovative thinking and cultivate their ability to analyze and solve practical engineering problems. [ABSTRACT FROM AUTHOR]