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将用户侧电、热、气等多种形式能源集成构建微能源系统，能够综合考虑多能流的转换、存储与传输过程中的互补特性，有利于提升系统的整体能源利用效率。然而，系统中不同形式能量的物理属性和传输特性差异较大，现有模型在研究多能流的传输和转换过程时，难以完整考虑热量传输约束及其对能量转换的影响。针对微能源系统中的综合能量管理问题，构建了热力系统中换热器的非线性传热模型，并考虑了热量传输对能量转换效率的影响。同时，结合光伏电池、储能电池、热泵、燃气锅炉、太阳能集热器及相变储热装置建立了微能源系统中能量传输与转换的整体模型，并以系统投资与运行总成本最小为目标构建了优化模型，提出了一种以混合整数线性优化为基础的分层迭代优化策略，通过对系统进行优化设计，研究了热量传输、转换与存储过程间的相互影响。对比发现：未考虑热量传输对热泵和太阳能集热器效率的影响时，太阳能集热器总出力为考虑热量输传输影响的80.2%，储热装置最佳容量仅为考虑热量输传输影响的48.9%。

生物资源的价值孙勇，林英华（林业部湿地资源监测中心北京１００７１４）（东北林业大学）生物资源是人类赖以生存的自然界重要组成部分，人们对生物资源利用的实践超前于对其理论上的研究，认识和研究生物资源的价值对决策一个国家的经济发展战略和物种保护是十分重要的...

据记载黑脸琵鹭（Platalea minor）的繁殖地仅限于朝鲜半岛西海岸,越冬于中国湖南、贵州、广东、香港、福建、台湾、澎湖列岛、海南岛和越南等地,在福建为留鸟。目前,估计全球的数量仅为600余只。因其分布区域狭窄,数量稀少,已被列为世界濒危鸟类。

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Cultivating outstanding professionals in energy chemistry can not only promote the development of the energy industry, but also constitute an essential component of the construction of applied science and engineering disciplines. Based on the internationally advanced outcome-based education (OBE) philosophy, this article uses the "Introduction to Energy Chemistry" course as an example, and puts forward a series of suggestions for exploring interdisciplinary professional course teaching reforms. With the aim of enhancing students' abilities and learning outcomes, we focus on students' understanding and application of knowledge, emphasize their active participation and collaboration, as well as impart learning skills and analytical thinking. In teaching, a student-centered approach is adopted to reform the objectives, competency standards, teaching assessment, learning resources, and methods of the introductory course in energy chemistry. By incorporating the OBE educational philosophy, the energy chemistry curriculum is made more targeted and practical. This enables students to better grasp the subject matter and apply their knowledge to real-life situations and work scenarios. The reformed curriculum integrates practical experiences and emphasizes the application of learned concepts, thereby enhancing the relevance and usefulness of the energy chemistry course for students. Ultimately, this leads to improved teaching quality and comprehensive enhancement of students' overall abilities, providing new ideas for the reform of new interdisciplinary professional course teaching. [ABSTRACT FROM AUTHOR]

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Approach slab installed at bridgehead of road-bridge transition section can effectively reduce the damage caused by vehicle bumping. However, there may also be some problems such as the rupture and disengaging of the approach slab. To avoid the abovementioned problems, theoretical and numerical simulation methods were used to study the layout scheme of approach slab at bridgehead of expressway road-bridge transition section. The present results show that there is an optimal scheme between the thickness and length of the approach slab, e. g., the optimal length of approach slab with the thickness of 0. 35 m should be larger than 8 m. The service life of the deeply buried approach slab is longer than that of the conventional layout of the approach slab, because the shear force of the deeply buried approach slab is obviously reduced. It also can be concluded that the pavement settlement will be significantly reduced when cement stabilized graded crushed stone is placed above the approach slab. [ABSTRACT FROM AUTHOR]

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