In the history of earthquake thermal infrared research, it is undeniable that before and after strong earthquakes there are significant thermal infrared anomalies which have been interpreted as preseismic precursor in earthquake prediction and forecasting. In this paper, we studied the characteristics of thermal radiation observed before and after the 8 great earthquakes with magnitude up to Ms7.0 by using the satellite infrared remote sensing information. We used new types of data and method to extract the useful anomaly information. Based on the analyses of 8 earthquakes, we got the results as follows. (1) There are significant thermal radiation anomalies before and after earthquakes for all cases. The overall performance of anomalies includes two main stages: expanding first and narrowing later. We easily extracted and identified such seismic anomalies by method of “time‐frequency relative power spectrum.” (2) There exist evident and different characteristic periods and magnitudes of thermal abnormal radiation for each case. (3) Thermal radiation anomalies are closely related to the geological structure. (4) Thermal radiation has obvious characteristics in abnormal duration, range, and morphology. In summary, we should be sure that earthquake thermal infrared anomalies as useful earthquake precursor can be used in earthquake prediction and forecasting.

In order to study the dynamic response of distributed small hydro and the influence on synthesis load modeling of the distribution network, the power grid of Hunan province is taken as the research object in this paper to study the influence of distributed generation on load modeling, in addition simulations of Hunan power grid with distributed small hydro clusters are performed by PSASP. Through simulations under different conditions disturbances in the grid such as different small hydro capacity and different location, an equivalent model of small hydro clusters is validated from different voltage level, and then the synthesis load model (SLM) with small hydro is presented. The simulink results show that, the equivalent model has a good description of the small hydro clusters.

Recently, the use of Global Navigation Satellite System (GNSS) in slope deformation monitoring has received great attention in the world. However, the high expenses of the setup, especially different kinds of receivers for various monitored points, and the accuracy has limited the application of GNSS in health monitoring. This study focuses on the application of Satellite Navigation Positioning System (BeiDou Navigation Satellite System) in healthy monitoring in slope. During the study, the control network points were positioned with GNSS measurement technique and height differences were supported with precise levelling measurements. Later on, deformation analysis using the height differences according to provided data from the GNSS and the data from the Total Station were carried out separately. The comparison between GNSS and the Total Station results will be shown in the paper.

The regional water cycle reflects both natural and social processes. The health of the regional water cycle is of great significance to the sustainable development of human beings. Focusing on the nine provinces and regions in the Yellow River Basin, this study utilized the DPSIRM model, including 21 basic indicators. In this paper, according to the principle of minimum information entropy, the three-scale AHP and EFAST algorithms were combined and weighted, and water cycle health status in the nine provinces and regions was evaluated based on the hook trapezoidal fuzzy TOPSIS model. Moreover, the traditional TOPSIS model was compared with the FCE method so as to evaluate the objectivity of the results. The obstacle degree model was introduced to obtain the main obstacle factors affecting the improvement of water circulation health in the nine provinces and regions. The results show that the water circulation health status in the nine provinces and regions is tending towards health, coordination, and balance. Water consumption in the ecological environment, water consumption per CNY 10,000 of GDP and forest coverage rate are the key factors that influence the improvement of water circulation health in the nine provinces and regions. The research results herein provide a scientific reference for the nine provinces and regions to achieve a healthy urban water cycle and regional sustainable development.