Rapid and accurate identification of the characteristics(source location,number,and intensity)of pollution sources is essential for emergency assessment of contamination events.Compared with single-point source iden-t...Rapid and accurate identification of the characteristics(source location,number,and intensity)of pollution sources is essential for emergency assessment of contamination events.Compared with single-point source iden-tification,the reconstruction of multiple sources is more challenging.In this study,a two-step inversion method is proposed for multi-point pollution source reconstruction from limited measurements with the number of sources unknown.The applicability of the proposed method is validated with a set of synthetic experiments correspond-ing to one-,two-,and three-point pollution sources.The results show that the number and locations of pollution sources are retrieved exactly the same as prescribed,and the source intensities are estimated with negligible errors.The algorithm exhibits good performance in single-and multi-point pollution source identification,and its accuracy and efficiency of identification do not deteriorate with the increase in the number of sources.Some limitations of the algorithm,together with its capabilities,are also discussed in this paper.展开更多
This article proposes a pedagogical strategy to develop proficiency in writing and comprehension in native and foreign languages. It is a pilot project which intends to explore, develop, build, collect, select, analyz...This article proposes a pedagogical strategy to develop proficiency in writing and comprehension in native and foreign languages. It is a pilot project which intends to explore, develop, build, collect, select, analyze, and prepare an action plan for that purpose. The strategy is being used at a Federal Institute in Brazil--IF Sudeste MG, Rio Pomba campus. The subjects involved in this process of investigation are students of two classes who attend their first year at High School integrated to technical courses. The methodology involves the use of a school journal as a teaching and learning resource to encourage literary reading and the production of different genres. The goal is to establish an interaction between the reading and writing mediated by a young and playful context offering an additional instrument for instruction, aimed at the use and reflection of the language.展开更多
基金supported by the National Key R&D Program of China[Grant Nos.2017YFC1501803 and 2017YFC1502102].
文摘Rapid and accurate identification of the characteristics(source location,number,and intensity)of pollution sources is essential for emergency assessment of contamination events.Compared with single-point source iden-tification,the reconstruction of multiple sources is more challenging.In this study,a two-step inversion method is proposed for multi-point pollution source reconstruction from limited measurements with the number of sources unknown.The applicability of the proposed method is validated with a set of synthetic experiments correspond-ing to one-,two-,and three-point pollution sources.The results show that the number and locations of pollution sources are retrieved exactly the same as prescribed,and the source intensities are estimated with negligible errors.The algorithm exhibits good performance in single-and multi-point pollution source identification,and its accuracy and efficiency of identification do not deteriorate with the increase in the number of sources.Some limitations of the algorithm,together with its capabilities,are also discussed in this paper.
文摘This article proposes a pedagogical strategy to develop proficiency in writing and comprehension in native and foreign languages. It is a pilot project which intends to explore, develop, build, collect, select, analyze, and prepare an action plan for that purpose. The strategy is being used at a Federal Institute in Brazil--IF Sudeste MG, Rio Pomba campus. The subjects involved in this process of investigation are students of two classes who attend their first year at High School integrated to technical courses. The methodology involves the use of a school journal as a teaching and learning resource to encourage literary reading and the production of different genres. The goal is to establish an interaction between the reading and writing mediated by a young and playful context offering an additional instrument for instruction, aimed at the use and reflection of the language.
