期刊：
International Journal of Internet Protocol Technology,2020年13(3):137-143 ISSN：1743-8209
作者机构：
[Huikai Zheng] School of Urban Management, Hunan City University, Yiyang 413000, Hunan, China
关键词：
internet of things environment;passive;energy-efficient house;monitoring system.
摘要：
The real-time monitoring system can improve the management of passive energy-saving houses. Therefore, this paper proposes a real-time monitoring system for passive energy-saving houses in the internet of things. Construct the overall framework of the system, use DSP integrated signal processor to process real-time information; select PCI9054 bus as output bus transmission mode, control the local bus through PCI, use the transceiver conversion module to analyse the monitoring information in real time; use ADO.NET component library Interact with the database to realise IoT management and control of monitoring information, and implement system software design by wavelet transform algorithm. The simulation results show that the designed system has a monitoring delay of only 2s, and the overall stability is strong. It can process the monitoring information of energy-saving houses in real time.
摘要：
Hydroponic experiments with different cadmium (Cd) concentrations were conducted to explore the impacts of nutrient allocation on the Cd enrichment of Bermuda grass. The results demonstrated with the Cd concentration increase, the accumulation of nitrogen (N), phosphorus (P) and potassium (K) in roots, stems and leaves increased first and then decreased, while the accumulation of Cd had no significant difference. The biomass and N, P and K accumulation of CD1 and CD2 were significantly different from those of CD3 and CD4, but there was no significant difference in Cd accumulation. The root N, P and K distribution ratio of CD4 increased by 47.9%, 114.3% and 64.3% compared with those of CD2 treatment, the values of stem decreased by 29.4%, 22.4% and 17.2%, and the values of leaves increased by 15.8%, 19.8% and 23.6% respectively. The K ratio of root and leaf increased and that of stem decreased. Cd reduced N and K distribution ratio of stem and increased N and K distribution ratio of root and leaf. Pearson correlation analysis showed that the accumulation of N, P and K in stems was positively correlated with the accumulation of Cd in stems, and the accumulation of N, P and K in roots, stems and leaves were positively correlated with the Cd accumulation in leaves. Bermuda grass can schedule the nutrient allocation to adapt to the Cd absorption and enrichment in different organs under different Cd concentrations. In conclusion, nutrient allocation might affect the Cd accumulation of Bermuda grass. (C) 2020 Elsevier Ltd. All rights reserved.
期刊：
International Journal of Global Energy Issues,2020年42(3-4):212-226 ISSN：0954-7118
作者机构：
[Jia-Jie Chen] Guangzhou Technology Development Centre of Gibs Co., Ltd., Guangzhou, Guangdong 510440, China;[Ji-Xian Hu] Department of Environmental Art Design, Hunan Arts And Crafts Vocational College, Yiyang, Hunan, 413000, China;[Hui-Hua Xiong] College of Architecture and Urban Planning, Hunan City University, Yiyang, Hunan 413000, China
关键词：
building planning;passive energy-saving;power supply system.
摘要：
In order to overcome the energy consumption problem of energy-saving technology in traditional urban power supply system, a new passive energy-saving technology for building planning is proposed. Based on the Ecotect tool, the best orientation is obtained, the digital simulation method is introduced and combined with the characteristics of the building itself to carry out the digital simulation, so as to realise the design of photovoltaic array. The output cables of solar cell module arrays are connected separately, so that each connection has a certain order, thus improving the fault tolerance of the system. The experimental results show that the proposed method has a high photovoltaic power generation capacity of 1726 kW and a low annual energy consumption of about 15 Wh/m². It is proved that passive energy-saving technology has better performance and higher reliability in power supply system.
摘要：
With the acceleration of urbanization and industrialization, increasingly serious global climate change issues have profoundly affected the survival and development of human beings, and natural, ecological and social systems are facing unprecedented threats and challenges. The purpose of this article is to study urban planning from multiple perspectives and levels, and strive to create a healthy ecologically balanced environment. This article takes city A as the research object, and uses the theory of SD and low-carbon(LC) cities as a guide to analyze the social and economic development level, regional resources, and environment of city A, and compare it with representative cities. Through the analysis of decoupling index, the stage of LC development in city A was clarified, and the urbanization rate of city A was 68%. The economic growth of city A mainly depends on the rapid development of high-energy-consuming industries. We must adjust the economic structure. On the basis of full demonstration and analysis, development strategies are proposed from the aspects of urban planning, LC economy and LC transportation to promote the harmonious development of the ecological environment and the city. (C) 2020 Elsevier Inc. All rights reserved.
