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Browsing by Author Ma, X.

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  • Effects of microplastics and earthworm burrows on soil macropore water flow within a laboratory soil column setup

    • Authors: Yu, M.;  Advisor: -;  Participants: van der Ploeg, M.; Ma, X.; Ritsema, C.J.; Geissen, V. (2020)

  • The macropore network parameters (i.e., number, length, volume, diameter, soil saturated conductivity, and tracer breakthrough curves of soil columns) have been determined. The relative arrival times of the tracer mass (i.e. T5%, T25%, and T50%) were determined in order to describe the shapes of the breakthrough curves. The results show that in some breakthrough curves for the treatments with earthworms, there are two peaks. This is an indication that water was flowing faster in the macropores than in the soil matrix. There is a significant correlation between 5% arrival time and the median burrow volume, and the correlation coefficient was .571 (at the level of p < .05). The formatio...
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  • Statistical learning for semantic parsing: A survey

    • Authors: Zhu, Q.;  Advisor: -;  Participants: Ma, X.; Li, X (2019)

  • A long-term goal of Artificial Intelligence (AI) is to provide machines with the capability of understanding natural language. Understanding natural language may be referred as the system must produce a correct response to the received input order. This response can be a robot move, an answer to a question, etc. One way to achieve this goal is semantic parsing. It parses utterances into semantic representations called logical form, a representation of many important linguistic phenomena that can be understood by machines. Semantic parsing is a fundamental problem in natural language understanding area. In recent years, researchers have made tremendous progress in this field. In this p...