Research and exploration of access database course teaching mode based on data management thinking

with the continuous improvement and development of information technology, the thinking of data management has been applied to all fi elds of society. The change of social needs puts forward new requirements for the general education of computing in Colleges and universities. According to the course teaching goal of cultivating students’ thinking ability of data management, this paper analyzes the practical problems in the current situation of access database course teaching, Combined with SPOC teaching mode, this paper studies and explores the hybrid teaching mode of the course, and gives the corresponding teaching measures and assessment methods

Designs of a Planar Waveguide Solar Concentrator

Solar energy, especially through the use of photovoltaic cells, is a promising sustainable energy source for human race. III-V multijunction photovoltaic cells with over 40% confirmed efficiency are among the best candidates for next generation solar cells. However, due to their complex fabrication process, these solar cells are currently too expensive for terrestrial 1 sun use. By using solar concentrators to replace sunlight collection area with cheap materials, total system cost is reduced and cell efficiency is increased. As a result, solar concentrators are viewed as an indispensable part in today’s multijunction photovoltaic cell systems. A novel planar waveguide solar concentrator is proposed in this work. Comparing to conventional solar concentrators, a waveguide is used to output homogenized light onto photovoltaic cells at its end surface. Such a planar structure is potentially easy to fabricate and is possible for novel sun tracking methods. It also benefits in terms of cell connections and heat management. The basic lens array-waveguide structure with the use of a tapered waveguide as a secondary concentrator shows over 90% efficiency under 800 geometric concentration under ideal cases. Optimizations are applied to the lens array, the couplers, and the secondary concentrator. The optimized structure has <1% geometry loss under 1000 geometric concentration and acceptance angles of 0.5˚~0.7˚ depending on the orientations due to structure asymmetry, which is verified by ZEMAX. As an integral part, solar tracking methods are reviewed and a two-axis tracking method realized by using a single-axis tracker and lateral translations is studied. Lateral translation is used for adjusting positions for seasonal sun movement. It has two-dimensional x-y tracking instead of horizontal movement x-only. A prototype system of 50 geometric concentration with >75% optical efficiency in simulation and >65% efficiency in experiment is presented as a practical example of the proposed tracking method

Análisis de la música y el sonido en películas chinas de artes marciales: Tigre y Dragón (Wo hu cang long)

En este trabajo se estudiará el uso del sonido y de la música en una película de artes marciales china de particular relevancia, Tigre y dragón (2000) y su secuela más reciente de 2016. Se hará un análisis cuantitativo del uso de recursos sonoros en cada escena. se hará sobre el tipo de música, sus referencias culturales, y sus características de ritmo, orquestación, etc. y el uso de leitmotifs y temas musicales reconocibles. Se estudiará también el uso de sonido de acciones y su enfatización. El otro análisis que he realizado responde a un análisis diacrónico. En este, de forma individual, he seleccionado algunas escenas significativas, correspondiente al fragmento analizado. El resultado mostrará concluir sobre la asociación entre géneros y estilos audiovisuales y su asociación con la utilización de recursos sonoros o sobre la caracterización de los personajes o escenas según el uso de los recursos sonoros.In this work we will study the use of sound and music in a Chinese martial arts film of particular relevance, Tiger and Dragon (2000) and its most recent sequel of 2016. There will be a quantitative analysis of the use of sound resources in each scene. it will be done on the type of music, its cultural references, and its characteristics of rhythm, orchestration, etc. and the use of leitmotifs and recognizable musical themes. The use of action sound and its emphasis will also be studied. The other analysis I have done responds to a diachronic analysis. In this, individually, I have selected some significant scenes, corresponding to the fragment analyzed. The result will show conclude on the association between genres and audiovisual styles and their association with the use of sound resources or on the characterization of the characters or scenes according to the use of sound resources.Liu, Y. (2018). Análisis de la música y el sonido en películas chinas de artes marciales: Tigre y Dragón (Wo hu cang long). Universitat Politècnica de València. http://hdl.handle.net/10251/98818TFG

Designs of a Planar Waveguide Solar Concentrator

Solar energy, especially through the use of photovoltaic cells, is a promising sustainable energy source for human race. III-V multijunction photovoltaic cells with over 40% confirmed efficiency are among the best candidates for next generation solar cells. However, due to their complex fabrication process, these solar cells are currently too expensive for terrestrial 1 sun use. By using solar concentrators to replace sunlight collection area with cheap materials, total system cost is reduced and cell efficiency is increased. As a result, solar concentrators are viewed as an indispensable part in today’s multijunction photovoltaic cell systems. A novel planar waveguide solar concentrator is proposed in this work. Comparing to conventional solar concentrators, a waveguide is used to output homogenized light onto photovoltaic cells at its end surface. Such a planar structure is potentially easy to fabricate and is possible for novel sun tracking methods. It also benefits in terms of cell connections and heat management. The basic lens array-waveguide structure with the use of a tapered waveguide as a secondary concentrator shows over 90% efficiency under 800 geometric concentration under ideal cases. Optimizations are applied to the lens array, the couplers, and the secondary concentrator. The optimized structure has <1% geometry loss under 1000 geometric concentration and acceptance angles of 0.5˚~0.7˚ depending on the orientations due to structure asymmetry, which is verified by ZEMAX. As an integral part, solar tracking methods are reviewed and a two-axis tracking method realized by using a single-axis tracker and lateral translations is studied. Lateral translation is used for adjusting positions for seasonal sun movement. It has two-dimensional x-y tracking instead of horizontal movement x-only. A prototype system of 50 geometric concentration with >75% optical efficiency in simulation and >65% efficiency in experiment is presented as a practical example of the proposed tracking method