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Journal articles on the topic 'Sichuan grid'

Author: Grafiati

Published: 10 September 2021

Last updated: 17 July 2025

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1

Zhang, Yongjie, Yunche Su, Xiaodi Wang, Yang Liu, Wei Chen, and Tao Hu. "Carbon emission analysis during the transformation of hydropower dominated grid for the carbon neutrality." E3S Web of Conferences 561 (2024): 02022. http://dx.doi.org/10.1051/e3sconf/202456102022.

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Driven by the carbon peaking and carbon neutrality goals, Sichuan Province, with its abundant hydropower and renewable energy resources, possesses the feasibility to pioneer in constructing a provincial-level carbon-neutral power system in China. However, current grid planning lacks sufficient consideration for carbon emission related goals and constraints. To investigate the carbon emission evolution path of Sichuan Power Grid under the carbon neutrality goal, firstly, the distribution and development status of clean energy sources in Sichuan are clarified in this paper, and the low-carbon te

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2

Kang, Yijie. "Analysis of “Spicy Nine-Grid Hotpot Concerto” for Guzheng Ensembles and Percussion Instruments." International Journal of Education and Humanities 14, no. 2 (2024): 238–40. http://dx.doi.org/10.54097/yrdp4j38.

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The concerto “Spicy Nine-Grid Hotpot” for guzheng ensembles and percussion instruments, composed by the renowned composer Professor Chen Zhe in 2020, is based on the common patterns of Han folk songs from Sichuan. It highlights the fact that Sichuan-Chongqing hotpot and labor songs along the Sichuan River shared the local dock culture as their common origin. The concerto fully showcases the diverseness in polyphony of guzheng ensembles. This paper provides a detailed analysis of the background against which the music was composed, division of musical sections, and performance techniques, aimin

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3

Tang, Fan, Li Jie Ding, Hua Zhang, and Biao Wang. "Impact Analysis of Excitation System Reactive Current Compensation on the Stability of Sichuan Power Grid." Advanced Materials Research 805-806 (September 2013): 735–40. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.735.

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Heffron-Philips model including excitation reactive current compensation (RCC) is set up, impact analysis of RCC on the stability of power system is carried out by theoretical analysis and time domain simulation. Analysis results show that positive RCC increases damping torque while reduces synchronous torque; negative compensation increases synchronizing torque while reduces damping torque, and this phenomenon is more obvious in heavy load. Combined with the actual situation in Sichuan power grid, the role of negative RCC to increase transient stability and provide dynamic reactive power for

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4

Li, Jin Jian, Rui Ting Wang, and Yi Zhao. "Simulation of Facility Agricultural Climate Resources Based on GIS in Sichuan Province." Advanced Materials Research 1073-1076 (December 2014): 2740–44. http://dx.doi.org/10.4028/www.scientific.net/amr.1073-1076.2740.

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By using the data of climate observation and site geographical information collected from 134 meteorological stations in Sichuan province since 1971, this paper established a calculation model in small grid to calculate the climate resources of facility agriculture including the days, precipitation and effective accumulated temperature in suitable period in Sichuan province. Based on Geographic Information System (GIS), the model was calculated and used to verify residual modification so as to ensure the relative accuracy of calculated values. Meanwhile, the plane and stereoscopic distribution

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Kong, Jian, Lulu Shan, Xiao Yan, and Youkun Wang. "Analysis of Ionospheric Disturbance Response to the Heavy Rain Event." Remote Sensing 14, no. 3 (2022): 510. http://dx.doi.org/10.3390/rs14030510.

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Meteorological activities in the troposphere would affect electron concentrations and distributions in the ionosphere, thereby exciting ionospheric disturbance. To explore the ionospheric anomalies during severe convective weather, the ionospheric phenomenon during the heavy rainfall in Sichuan Province on 9 July 2013 was analyzed based on GNSS data. The Total Electron Content (TEC) are evaluated by carrier phase smoothed pseudoranges. Then, the dTEC (detrend TEC) sequences are obtained by using the cubic smoothing spline. They show obvious N-shaped ionospheric disturbances and have propagatio

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6

Liu, Tao, Jingru Liu, Yanlei Li, and Yanfeng Li. "The Spatiotemporal Changes of China's Inter-provincial Power Transmission Network from 2005 to 2020." International Journal of Energy 3, no. 2 (2023): 68–73. http://dx.doi.org/10.54097/ije.v3i2.016.

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This study integrates the downscaling model of electricity production consumption, the balance equation of electricity inflow and outflow, and the actual connectivity between provincial power grids into a research framework, and develops a downscaling method for inter-regional power transmission data, thereby obtaining a complete inter provincial power transmission dataset. It was found that from 2005 to 2020, the source of power supply gradually shifted from the Central China Power Grid to the Southwest Power Grid. Sichuan, Yunnan, and some provinces in the southwest region have become import

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7

Ni, Da, Huai Wei Yang, Xiao Yuan Chen, and Yong Jun Xia. "Process of Tower Erection in Sections with Internal-Suspended and External-Guyed Holding Pole of Pivot Strut of Iron Tower’s Main Members." Advanced Materials Research 1065-1069 (December 2014): 1568–72. http://dx.doi.org/10.4028/www.scientific.net/amr.1065-1069.1568.

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This thesis introduces the main process flows of holding pole lifting and supporting pole installation during the tower erection by combining the landform features of “high mountains and highlands in Eastern Tibet and Western Sichuan Province” of power transmission and transformation of grid networking between Changdu of Tibet and Sichuan Province, aiming at the problem that that the line stringing of holding pole is influenced by landforms of cliff, etc. and adopting light combined compound-material holding pole as lifting mechanism, to solve the tower erection at the tower positions like cli

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8

Du, Xin Wei, Zhi Chao Ren, and Hai Yan Wang. "Connotation and Research Areas of Coordinated Development of Power Supply, Load and Power Grid in Sichuan." Applied Mechanics and Materials 448-453 (October 2013): 2717–20. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.2717.

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With the rapid growth of hydropower in Sichuan, power structure becomes a primary issue of development of power grid. In this paper, the understandings of the connotation of coordinated development are proposed that it is of importance to rely on power exchanging using power grid platform to supplement provincial power and load characteristic. Main research contents are summed up from nine areas from the aspects of inside and outside province. And some difficulties needed to pay attention are also explained.

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9

Jiang, Pan, Hanwen Zhang, Mengyue Li, et al. "Research on the Structural Optimization of the Clean Energy Industry in the Context of Dual Carbon Strategy—A Case Study of Sichuan Province, China." Sustainability 15, no. 4 (2023): 2993. http://dx.doi.org/10.3390/su15042993.

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As a major province for hydroelectric power in China, Sichuan Province has witnessed a great amount of seasonal characteristics in its hydroelectric power, endowing the clean energy industry in Sichuan with the characteristics of unstable supply in different seasons, strong power transmission capacity, and low production capacity of other non-fossil energy sources (except hydroelectric power). In this study, the mathematical model method was used to construct a structural optimization model of the clean energy industry in Sichuan Province, and to enable a quantitative analysis of the rationali

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10

He, Xing Qi, Qi Jun Xian, and Ping Yan. "Research of Loss Reduction Efficiency Based on DEA." Advanced Materials Research 1070-1072 (December 2014): 1545–48. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.1545.

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An evaluation system of loss reduction efficiency was established for power supply companies by using data envelopment analysis methods,and the empirical demonstration research was conducted for loss reduction efficiency of power supply companies in Sichuan.The evaluation results indicate that Institutional reform, grid construction and informationization promote the loss reduction efficiency of the power supply companies in Sichuan. However, due to the development foundation is weak, the scale efficiency is a key factor that restricts the loss reduction efficiency of the power supply companie

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11

Fan, Song Hai, and Shu Hong Yang. "Detection and Identification of Error in On-Line Monitoring of Transmission Line." Applied Mechanics and Materials 687-691 (November 2014): 869–73. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.869.

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Systematic approach for the transmission line positive sequence parameters, temperature, and sag based on wavelet analysis to detect error is developed in this work. Unbiased (random/Gaussian) error such as, transient meter failures, transient meter malfunction, and measurements captured during system transients, are inherently in the form of large abrupt change of short duration in a measurement-sequence. These should be detected before the data is used because their presence will lead to insecure and unstable of power grid. The test results of the proposed method based on data of Sichuan pow

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12

Lai, Pengyou, Jingtao Yang, Lexi Liu, et al. "Sichuan Rainfall Prediction Using an Analog Ensemble." Atmosphere 14, no. 8 (2023): 1223. http://dx.doi.org/10.3390/atmos14081223.

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This study aimed to address the significant bias in 0–44-day precipitation forecasts under numerical weather conditions. To achieve this, we utilized observational data obtained from 156 surface stations in the Sichuan region and reanalysis grid data from the National Centers for Environmental Prediction Climate Forecast System Model version 2. Statistical analysis of the spatiotemporal characteristics of precipitation in Sichuan was conducted, followed by a correction experiment based on the Analog Ensemble algorithm for 0–44-day precipitation forecasts for different seasons in the Sichuan re

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13

Zhang, Hongbo, Tianqi Ao, Maksym Gusyev, Hiroshi Ishidaira, Jun Magome, and Kuniyoshi Takeuchi. "Distributed source pollutant transport module based on BTOPMC: a case study of the Laixi River basin in the Sichuan province of southwest China." Proceedings of the International Association of Hydrological Sciences 379 (June 5, 2018): 323–33. http://dx.doi.org/10.5194/piahs-379-323-2018.

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Abstract. Nitrogen and phosphorus concentrations in Chinese river catchments are contributed by agricultural non-point and industrial point sources causing deterioration of river water quality and degradation of ecosystem functioning for a long distance downstream. To evaluate these impacts, a distributed pollutant transport module was developed on the basis of BTOPMC (Block-Wise Use of TOPMODEL with Muskingum-Cunge Method), a grid-based distributed hydrological model, using the water flow routing process of BTOPMC as the carrier of pollutant transport due a direct runoff. The pollutant flux a

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14

Yang, Dan, Siying Du, Wentao Zhang, et al. "Study on vegetation restoration technology in ecologically sensitive area of power transmission and transformation project in Sichuan-Chongqing area." Advances in Education, Humanities and Social Science Research 8, no. 1 (2023): 83. http://dx.doi.org/10.56028/aehssr.8.1.83.2023.

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In the rapid development of urban construction, China's power transmission and transformation engineering construction scope is more and more wide, in order to better cope with the opportunities and challenges proposed by the development of The Times, the National Grid Co., Ltd. technical research team in the proposed a number of key technologies at the same time, mastered a lot of theoretical knowledge and practical experience, which for the new period of ecological environmental protection laid the foundation. Especially for the Sichuan-Chongqing area, the vegetation restoration technology m

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15

Li, Bin, Shijun Chen, Weibin Huang, Guangwen Ma, Yanlong Hu, and Yujian Ye. "Pricing of grid electricity of reservoir power plants based on quantification of the values of positive externality factors." Water Policy 22, no. 3 (2020): 376–95. http://dx.doi.org/10.2166/wp.2020.133.

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Abstract Hydropower is a clean, low-carbon renewable energy source with the merits of mature technology and flexible operation. Moreover, hydropower plants provide comprehensive utilization functions in many areas, including flood control, shipping, and emission reduction. In the current contradictive situation between power supply and demand, China's hydropower grid pricing mechanism does not reflect the positive externality of hydropower, which is not conducive to fair competition between hydropower and other power sources. This study proposed the concept of the positive external electricity

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16

Chen, Gang, Fan Tang, Yu Fei Teng, Hua Zhang, and Li Jie Ding. "Studies on Improving the AC Outward Transmission Capacity of Sichuan Power Grid by Utilization of Phase-Shifting Transformers." Advanced Materials Research 960-961 (June 2014): 1000–1005. http://dx.doi.org/10.4028/www.scientific.net/amr.960-961.1000.

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In this paper, the feasibility analysis of the utilization of phase shifting transformers (PSTs) to improve the AC outward transmission capacity of Sichuan power grid (SCPG) is presented. Firstly, the authors analyze the working principle of PST, as well as the rules for selecting its location. Then, the AC outward transmission limit of SCPG is studied with PSASP software. Finally, the PST is used to change the power flow distribution of lines on border of SCPG. Simulations results show that the PST can significantly improve the AC outward transmission capacity of SCPG. At the same time, short

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17

Wang, Chengxin, Li Liang, Wancheng Zhang, Shouting Gao, and Shuai Yang. "The Impact of Improved Topographic Resolution on the Distribution of Terrain Spectra and Grid-Size Selection for Mesoscale Models." Atmosphere 13, no. 5 (2022): 708. http://dx.doi.org/10.3390/atmos13050708.

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Spectral analysis of terrain height variance is conducive to quantitatively study the terrain characteristics and grid-size selection for mesoscale models. Improved topographic resolutions can lead to the variations of terrain characteristics and the appropriate grid size for a fixed analyzed area. Spectral methods of one-dimensional weighted average and arithmetic mean were used to investigate the specific impact on the distribution of terrain spectra and grid-size selection for mesoscale models of the landslide-prone areas in western Sichuan. The results indicate that the maximum spectral en

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18

Hou, Cheng, and Yuehua Geng. "Research on the Development of Intangible Cultural Heritage Tourism Products in Nanchong." International Journal of Education and Humanities 8, no. 1 (2023): 76–79. http://dx.doi.org/10.54097/ijeh.v8i1.6943.

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Promoting the integrated development of intangible cultural heritage and tourism is an important direction of China's development. Nanchong City, the central city of Northeast Sichuan Economic Zone of China, is selected as the research object. Based on the statistics of the existing intangible cultural heritage tourism resources in Nanchong City, the development status of its intangible cultural heritage tourism products is deeply analyzed by using ASEB grid analysis method. Based on the analysis results, it is proposed that the intangible cultural heritage tourism in Nanchong should be streng

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19

Chen, D., Y. Wang, M. B. McElroy, K. He, R. M. Yantosca, and P. Le Sager. "Regional CO pollution in China simulated by the high-resolution nested-grid GEOS-Chem model." Atmospheric Chemistry and Physics Discussions 9, no. 2 (2009): 5853–87. http://dx.doi.org/10.5194/acpd-9-5853-2009.

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Abstract. An updated version of the nested-grid GEOS-Chem model is developed allowing for higher horizontal (0.5°×0.667°) and vertical resolution as compared to global models. CO transport over a heavily polluted region, the Beijing-Tianjin-Hebei (BTH) city cluster in China, and the pattern of outflow from East China in summertime are investigated. Comparison of the nested-grid with global models indicates that the fine-resolution nested-grid model is capable of resolving individual cities with high associated emission intensities. The nested-grid model indicates the presence of a high CO colu

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20

Chen, D., Y. Wang, M. B. McElroy, K. He, R. M. Yantosca, and P. Le Sager. "Regional CO pollution and export in China simulated by the high-resolution nested-grid GEOS-Chem model." Atmospheric Chemistry and Physics 9, no. 11 (2009): 3825–39. http://dx.doi.org/10.5194/acp-9-3825-2009.

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Abstract. An updated version of the nested-grid GEOS-Chem model is developed allowing for higher horizontal (0.5°×0.667°) resolution as compared to global models. CO transport over a heavily polluted region, the Beijing-Tianjin-Hebei (BTH) city cluster in China, and the pattern of outflow from East China in summertime are investigated. Comparison of the nested-grid with global models indicates that the fine-resolution nested-grid model is capable of resolving individual cities with high associated emission intensities. The nested-grid model indicates the presence of a high CO column density ov

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21

Fan, Wenjie, Ye Zhu, Yingfeng Ji, Lili Feng, Weiling Zhu, and Rui Qu. "Present-Day Tectonic Stress Evolution in Southern Yunnan Based on Focal Mechanisms." Sensors 23, no. 17 (2023): 7406. http://dx.doi.org/10.3390/s23177406.

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Tectonic extrusion bypassing the eastern Himalayan syntaxis results in a significant increase in regional stress instability and the associated frequent occurrence of earthquakes in southern Yunnan, China. However, the stress field, and the relationship between the focal mechanism of earthquakes and stress evolution in southern Yunnan, remain enigmatic. In this paper, using a modified grid point test method, we calculated the focal mechanism of ML ≥ 2.5 earthquakes in southern Yunnan (22–25° N, 100–104° E) from January 2009 to June 2023. Utilizing the solutions of historical earthquake focal m

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22

Ye, Xi, Zhen Chen, Tong Zhu, Wei Wei, and Haojin Peng. "Fast Coordinated Predictive Control for Renewable Energy Integrated Cascade Hydropower System Based on Quantum Neural Network." Electronics 13, no. 4 (2024): 732. http://dx.doi.org/10.3390/electronics13040732.

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The increasing penetration of renewable energy poses intractable uncertainties in cascade hydropower systems, such that excessively conservative operations and unnecessary curtailment of clean energies can be incurred. To address these challenges, a quantum neural network (QNN)-based coordinated predictive control approach is proposed. It manipulates coordinated dispatch of multiple clean energy sources, including hydro, wind, and solar power, leverages QNN to conquer intricate multi-uncertainty and learn intraday predictive control patterns, by taking renewable power, load, demand response (D

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23

Meng, Yunshan, Hengxing Lan, Langping Li, Yuming Wu, and Quanwen Li. "Characteristics of Surface Deformation Detected by X-band SAR Interferometry over Sichuan-Tibet Grid Connection Project Area, China." Remote Sensing 7, no. 9 (2015): 12265–81. http://dx.doi.org/10.3390/rs70912265.

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24

Li, Zhaofei, Na Zhao, Han Zhang, Yang Wei, Yumin Chen, and Run Ma. "Research on High Spatiotemporal Resolution of XCO2 in Sichuan Province Based on Stacking Ensemble Learning." Sustainability 17, no. 8 (2025): 3433. https://doi.org/10.3390/su17083433.

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Global warming caused by the increase in the atmospheric CO2 content has become a focal environmental issue of common concern to the international community. As a key resource support for achieving the “dual carbon” goals in Western China, Sichuan Province requires a deep analysis of its carbon sources, carbon sinks, and its characteristics in terms of atmospheric environmental capacity, which is of great significance for formulating effective regional sustainable development strategies and responding to global climate change. In view of the unique geographical and climatic conditions in Sichu

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25

Wang, Haijun, Xiangdong Kong, Onanong Phewnil, et al. "Spatiotemporal prediction of alpine wetlands under multi-climate scenarios in the west of Sichuan, China." PeerJ 12 (November 27, 2024): e18586. http://dx.doi.org/10.7717/peerj.18586.

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Background The alpine wetlands in western Sichuan are distributed along the eastern section of the Qinghai-Tibet Plateau (QTP), where the ecological environment is fragile and highly sensitive to global climate change. These wetlands are already experiencing severe ecological and environmental issues, such as drought, retrogressive succession, and desertification. However, due to the limitations of computational models, previous studies have been unable to adequately understand the spatiotemporal change trends of these alpine wetlands. Methods We employed a large sample and composite supervise

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26

Gao, Jian, Xi Ye, Xia Lei, Bohao Huang, Xi Wang, and Lili Wang. "A Multichannel-Based CNN and GRU Method for Short-Term Wind Power Prediction." Electronics 12, no. 21 (2023): 4479. http://dx.doi.org/10.3390/electronics12214479.

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Incorporating wind energy on a large scale into power systems presents challenges for the operation and control of the grid. To enhance the safety of power grid operation, accurate short-term forecasting of wind power is necessary, as it minimizes the impact of randomness. Considering the uncertainty and prediction issues associated with wind power, this paper introduces a CNN–GRU ultra-short-term wind power prediction model. This model relies on multichannel signals, including data such as wind speed, wind direction, climate conditions, and historical power outputs collected from wind farms.

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27

Shi, Huabo, Xinwei Sun, Gang Chen, et al. "Optimization Strategy of SVC for Eliminating Electromagnetic Oscillation in Weak Networking Power Systems." Energies 12, no. 18 (2019): 3489. http://dx.doi.org/10.3390/en12183489.

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The central Tibet AC interconnection project (CTAIP), which connects the Tibet power grid and the Sichuan power grid through a long distance transmission line of more than 1400 km, has a significant problem of voltage regulation. In order to improve the voltage regulation performance, six sets of ±60 Mvar static VAR compensators (SVC) were installed in the CTAIP. However, the SVCs may lead to electromagnetic oscillation below 50 Hz while improving voltage regulation capability. In this paper, the electromagnetic oscillation modes and the sensitivity of control parameters of SVC are analyzed. T

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28

Du, Xulin, Linsong Cheng, Jun Chen, Jianchao Cai, Langyu Niu, and Renyi Cao. "Numerical Investigation for Three-Dimensional Multiscale Fracture Networks Based on a Coupled Hybrid Model." Energies 14, no. 19 (2021): 6354. http://dx.doi.org/10.3390/en14196354.

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The mismatching between the multi-scale feature of complex fracture networks (CFNs) in unconventional reservoirs and their current numerical approaches is a conspicuous problem to be solved. In this paper, the CFNs are divided into hydraulic macro-fractures, induced fractures, and natural micro-fractures according to their mode of origin. A hybrid model coupling various numerical approaches is proposed to match the three-dimensional multi-scale fracture networks. The macro-fractures with high-conductivity and wide-aperture are explicitly characterized by a mimetic Green element method-based hi

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29

Yang, Lintao, and Honggeng Yang. "Analysis of Different Neural Networks and a New Architecture for Short-Term Load Forecasting." Energies 12, no. 8 (2019): 1433. http://dx.doi.org/10.3390/en12081433.

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Short-term load forecasting (STLF) has been widely studied because it plays a very important role in improving the economy and security of electric system operations. Many types of neural networks have been successfully used for STLF. In most of these methods, common neural networks were used, but without a systematic comparative analysis. In this paper, we first compare the most frequently used neural networks’ performance on the load dataset from the State Grid Sichuan Electric Power Company (China). Then, considering the current neural networks’ disadvantages, we propose a new architecture

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30

Chen, Yunzhou, Shumin Wang, Ziying Gu, and Fan Yang. "Modeling the Spatial Distribution of Population Based on Random Forest and Parameter Optimization Methods: A Case Study of Sichuan, China." Applied Sciences 14, no. 1 (2024): 446. http://dx.doi.org/10.3390/app14010446.

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Spatial population distribution data is the discretization of demographic data into spatial grids, which has vital reference significance for disaster emergency response, disaster assessment, emergency rescue resource allocation, and post-disaster reconstruction. The random forest (RF) model, as a prominent method for modeling the spatial distribution of population, has been studied by many scholars, both domestically and abroad. Specifically, research has focused on aspects such as multi-source data fusion, feature selection, and data accuracy evaluation within the modeling process. However,

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Zhao, Zhenyu, and Huijia Yang. "Regional Security Assessment of Integrated Energy Systems with Renewables in China: A Grid-Connected Perspective." Sustainability 12, no. 24 (2020): 10299. http://dx.doi.org/10.3390/su122410299.

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Stable and reliable integrated energy systems are one of the major issues related to sustainable regional and national energy development. Because most existing studies are conducted on whole countries, few address the effects of regional interaction and renewable energy. Therefore, a natural disaster risk assessment model (NDRAM) combined with spatial models is used as a general systematic tool to assess and resolve regional energy security, based on a framework of resources, generation, transmission, marketing and consumption, with 17 metrics. In particular, energy systems were treated as or

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Wei, Wei, Li Jie Ding, Ying Liu, and Hua Bo Shi. "The Coordination and Optimization Study of PSS Parameters of Multiple Generators." Advanced Materials Research 805-806 (September 2013): 805–10. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.805.

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For the parameter coordination and optimization of PSS in a multi-machine power system, this paper proposes a new method based on the Phillips-Heffron model to search the optimal install locations of PSS, which employs the sensitivity of the system eigenvalue to the PSS gain as the indicator of its install location, i.e. the larger this sensitivity is, the more the system damping can be improved effectively when the PSS is installed at the corresponding generator. Moreover, based on the block matrix theory and the Newton-Raphson iterative algorithm, the proposed method optimizes the parameters

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Li, Dongping, Qingquan Tan, Zhiyi Tong, et al. "Rapid determination of seismic influence field based on mobile communication big data—A case study of the Luding Ms 6.8 earthquake in Sichuan, China." PLOS ONE 19, no. 5 (2024): e0298236. http://dx.doi.org/10.1371/journal.pone.0298236.

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Smartphone location data provide the most direct field disaster distribution data with low cost and high coverage. The large-scale continuous sampling of mobile device location data provides a new way to estimate the distribution of disasters with high temporal–spatial resolution. On September 5, 2022, a magnitude 6.8 earthquake struck Luding County, Sichuan Province, China. We quantitatively analyzed the Ms 6.8 earthquake from both temporal and geographic dimensions by combining 1,806,100 smartphone location records and 4,856 spatial grid locations collected through communication big data wit

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Zeng, Qiaolin, Hao Zhu, Yanghua Gao, Tianshou Xie, Sizhu Liu, and Liangfu Chen. "Estimating Full-Coverage PM2.5 Concentrations Based on Himawari-8 and NAQPMS Data over Sichuan-Chongqing." Applied Sciences 12, no. 14 (2022): 7065. http://dx.doi.org/10.3390/app12147065.

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Fine particulate matter (PM2.5) has attracted extensive attention due to its harmful effects on humans and the environment. The sparse ground-based air monitoring stations limit their application for scientific research, while aerosol optical depth (AOD) by remote sensing satellite technology retrieval can reflect air quality on a large scale and thus compensate for the shortcomings of ground-based measurements. In this study, the elaborate vertical-humidity method was used to estimate PM2.5 with the spatial resolution 1 km and the temporal resolution 1 hour. For vertical correction, the scale

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Lu, Chengwei, Ting Chen, Xinyue Yang, et al. "Development and Application of a Novel Snow Peak Sighting Forecast System over Chengdu." Atmosphere 14, no. 7 (2023): 1181. http://dx.doi.org/10.3390/atmos14071181.

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As air quality has improved rapidly in recent years, the public has become more interested in whether a famous snow peak, Yaomei Feng on the Tibetan Plateau, can be seen from Chengdu, a megacity located on the western plain of the Sichuan Basin, east of the plateau. Therefore, a threshold-method-based forecasting system for snow peak sighting was developed in this study. Variables from numerical models, including cloud–water mixing ratio, cloud cover over snow peak, water mixing ratio, PM2.5 concentration, and ground solar radiation, were used in the snow peak sighting forecast system. Terrain

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Sun, Youwen, Hao Yin, Xiao Lu, et al. "The drivers and health risks of unexpected surface ozone enhancements over the Sichuan Basin, China, in 2020." Atmospheric Chemistry and Physics 21, no. 24 (2021): 18589–608. http://dx.doi.org/10.5194/acp-21-18589-2021.

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Abstract. Following a continuous increase in the surface ozone (O3) level from 2013 to 2019, the overall summertime O3 concentrations across China showed a significant reduction in 2020. In contrast to this overall reduction in surface O3 across China, unexpected surface O3 enhancements of 10.2 ± 0.8 ppbv (23.4 %) were observed in May–June 2020 (relative to 2019) over the Sichuan Basin (SCB), China. In this study, we use high-resolution nested-grid GEOS-Chem simulation, the eXtreme Gradient Boosting (XGBoost) machine learning method, and the exposure–response relationship to determine the driv

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Zheng, Qing, Wei Sun, Jian Li, Yong Feng, Zhiwei Heng, and Xingwen Jiang. "Impacts of Moisture Advection Scheme on Precipitation in the Steep Topography Region between the Tibetan Plateau and the Sichuan Basin." Journal of Applied Meteorology and Climatology 63, no. 7 (2024): 781–801. http://dx.doi.org/10.1175/jamc-d-23-0111.1.

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Abstract Water vapor transport is a crucial process in modeling and can contribute to errors in precipitation forecasts. To investigate the sensitivity of precipitation to the moisture advection scheme, this study introduced the two-step shape-preserving advection scheme (TSPAS), which has been proven to improve precipitation simulation over steep topography at lower resolutions, into the Southwest Center Weather Research and Forecast (WRF)-based Intelligent Numerical Grid Forecast System (SWC-WINGS) at a convection-permitting resolution. According to experiments conducted throughout the summe

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Luo, Zhang, Cheng, and Sun. "Modeling Population Density using a New Index Derived from Multi-Sensor Image Data." Remote Sensing 11, no. 22 (2019): 2620. http://dx.doi.org/10.3390/rs11222620.

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The detailed information about the spatial distribution of the population is crucial for analyzing economic growth, environmental change, and natural disaster damage. Using the nighttime light (NTL) imagery for population estimation has been a topic of interest in recent decades. However, the effectiveness of NTL data in population estimation has been impeded by some limitations such as the blooming effect and underestimation in rural regions. To overcome these limitations, we combine the NPP-VIIRS day/night band (DNB) data with normalized difference vegetation index (NDVI) and land surface te

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Bian, Weiwei, Jicang Wu, and Weiwei Wu. "Recent Crustal Deformation Based on Interpolation of GNSS Velocity in Continental China." Remote Sensing 12, no. 22 (2020): 3753. http://dx.doi.org/10.3390/rs12223753.

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We used the interpolation method of two-dimensional vector velocity field data based on Green’s function to conduct coupled interpolation with a Poisson’s ratio of 0.5 for 1966 horizontal velocity field data from 1999 to 2017 and obtained the uniform velocity field and strain rate field with a grid of 1°. The main results are as follows: the eastern Himalayan structure as the center, the eastern Lhasa block, the eastern Qiangtang block, the Sichuan-Yunnan block, and the Burma block form a strong deformation rate zone of continuous deformation in the fan-shaped region, which has been a strong d

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Hua, Yiying, Xuesheng Zhao, Wenbin Sun, and Qiwen Sun. "Satellite-Based Reconstruction of Atmospheric CO2 Concentration over China Using a Hybrid CNN and Spatiotemporal Kriging Model." Remote Sensing 16, no. 13 (2024): 2433. http://dx.doi.org/10.3390/rs16132433.

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Although atmospheric CO2 concentrations collected by satellites play a crucial role in understanding global greenhouse gases, the sparse geographic distribution greatly affects their widespread application. In this paper, a hybrid CNN and spatiotemporal Kriging (CNN-STK) model is proposed to generate a monthly spatiotemporal continuous XCO2 dataset over China at 0.25° grid-scale from 2015 to 2020, utilizing OCO-2 XCO2 and geographic covariates. The validations against observation samples, CAMS XCO2 and TCCON measurements indicate the CNN-STK model is effective, robust, and reliable with high a

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Ma, Pengcheng, and Shanfa Tang. "Simulation of Key Influencing Factors of Hydraulic Fracturing Fracture Propagation in a Shale Reservoir Based on the Displacement Discontinuity Method (DDM)." Processes 12, no. 5 (2024): 1000. http://dx.doi.org/10.3390/pr12051000.

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In the process of the large-scale hydraulic fracturing of a shale gas field in the Weiyuan area of Sichuan province, the quantitative description and evaluation of hydraulic fracture expansion morphology and the three-dimensional distribution law are the key points of evaluation of block fracturing transformation effect. Many scholars have used the finite element method, discrete element method, grid-free method and other numerical simulation methods to quantitatively characterize hydraulic fractures, but there are often the problems that the indoor physical simulation results are much differe

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JIA, FEI, NAN WANG, and GUANG-MEI ZHENG. "Winter habitat requirements of White Eared-pheasant Crossoptilon crossoptilon and Blood Pheasant Ithaginis cruentus in south-west China." Bird Conservation International 15, no. 3 (2005): 303–12. http://dx.doi.org/10.1017/s095927090500047x.

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Understanding the habitat needs of White Eared-pheasant Crossoptilon crossoptilon and Blood Pheasant Ithaginis cruentus is important for their conservation. We carried out field surveys of the two pheasants around Zhujie Monastery, Daocheng County, Sichuan Province, China, using line transects. In total, 172 200 × 200 m grid squares were obtained, including 56 active and 116 inactive ones for White Eared-pheasant and 45 active and 127 inactive ones for Blood Pheasant. We analysed the occurrence of both species by logistic multiple regression. The most important variables in model 1 for White E

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Zhou, Fangbin, Guowei Ma, Caichang Xie, Yunfei Zhang, and Zhiwen Xiao. "Application of Compound Terrain Factor LSW in Vegetation Cover Evaluation." Applied Sciences 13, no. 21 (2023): 11806. http://dx.doi.org/10.3390/app132111806.

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Aiming at the limited degree of revealing vegetation growth pattern by simple topographic factors, it is essential to find an index that can explain the vegetation cover mechanism to a greater extent. By introducing a certainty factor into vegetation cover evaluation, LSW, LS, topographic wetness index, and aspect were also chosen to carry out control group experiments. The grid digital elevation model of 10 disaster-stricken counties (cities) in Sichuan Province was used as the basis to obtain LSW, while vegetation susceptibility levels were categorized using the natural breaks classification

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Tang, Shunxian, Rui Li, Jianxin He, Hao Wang, Xingang Fan, and Shuangyu Yao. "Comparative Evaluation of the GPM IMERG Early, Late, and Final Hourly Precipitation Products Using the CMPA Data over Sichuan Basin of China." Water 12, no. 2 (2020): 554. http://dx.doi.org/10.3390/w12020554.

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The Global Precipitation Measurement (GPM) mission has generated global precipitation products of improved accuracy and coverage that are promising for advanced hydrological and meteorological studies. This study evaluates three Integrated Multi-satellitE Retrievals for GPM (IMERG) Hourly products, including the Early-, Late-, and Final-run products (IMERG-HE, IMERG-HL, and IMERG-HF, respectively), over Sichuan Basin of China. This highly complex terrain of the steep mountainous region offers further scrutiny on the quality and applicability of the data. The China Meteorological Precipitation

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Chen, Xiao-li, Xin-jian Shan, Ming-ming Wang, Chun-guo Liu, and Na-na Han. "Distribution Pattern of Coseismic Landslides Triggered by the 2017 Jiuzhaigou Ms 7.0 Earthquake of China: Control of Seismic Landslide Susceptibility." ISPRS International Journal of Geo-Information 9, no. 4 (2020): 198. http://dx.doi.org/10.3390/ijgi9040198.

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On 8 August 2017 an earthquake (MS7.0) occurred within Jiuzhaigou County, Northern Aba Prefecture, Sichuan Province, China, triggering 4834 landslides with an individual area greater than 7.8 m2 over a more than 400 km2 region. Instead of correlating geological and topographic factors with the coseismic landslide distribution pattern, this study has attempted to reveal the control from seismic landslide susceptibility mapping, which relies on the calculation of critical acceleration values using a simplified Newmark block model. We calculated the average critical acceleration for each cell of

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Zeng, Zhaoqi, Wenxiang Wu, Zhaolei Li, Yang Zhou, Yahui Guo, and Han Huang. "Agricultural Drought Risk Assessment in Southwest China." Water 11, no. 5 (2019): 1064. http://dx.doi.org/10.3390/w11051064.

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Drought disasters jeopardize agricultural production and are expected to become more serious in the context of global climate change. However, in China, little attention has been paid to evaluating agricultural drought risk in humid areas (such as in Southwest China), which have also been affected by severe drought in recent years. In this work, we used the Standardized Precipitation Evapotranspiration Index (SPEI), which was computed from high-quality monthly precipitation and temperature data from 92 rain-gauge stations across Southwest China, to study the drought characteristics (e.g., inte

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Chen, Jian, Ke Liu, Yebin Huang, Yuefu Bei, and Aoxiang Wu. "Study on the Applicability of Flexible Graphite Grounding Body and Grounding Module for 500kV Transmission Line in High Altitude Area." Frontiers in Science and Engineering 3, no. 12 (2023): 81–90. http://dx.doi.org/10.54691/qc09te98.

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Sichuan-Tibet Railway Changdu-Linzhi section construction power supply project (Phase II) by Tibet Power Grid Co. 4900m), the mountain is treacherous, the foundation excavation is difficult (mostly rock foundation). Among them, 3 times across 35kV lines, 1 time across 220kV lines, 1 time across the Nujiang River, across the construction is more difficult. At present, China often use galvanized steel, galvanized copper and other traditional grounding materials, due to corrosion phenomenon caused by the increase in grounding resistance, affecting the frequency current, lightning current dispersi

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Qin, Zeshi, and Juan Shi. "Feasibility of Species Origin Traceability by Hydrogen Stable Isotopes: Sample Case of Lymantria dispar L. (Lepidoptera: Erebidae)." Forests 11, no. 11 (2020): 1209. http://dx.doi.org/10.3390/f11111209.

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Lymantria dispar L. (Lepidoptera: Erebidae) is an international quarantine pest with many hosts, widely distributed in Asia, Europe, and America. L. dispar is distributed mainly in the Eastern Monsoon Region of China. Currently, the most effective means of prevention and control of this pest are timely monitoring and early warning. However, their implementation is usually hampered by the lack of feasible methods and tools for fast tracking and traceability. Stable isotope technology can be used for material traceability, but in China, it is rarely employed for insect traceability. Therefore, u

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Peng, Lu, and Zhihui Li. "Ensemble Flood Risk Assessment in the Yangtze River Economic Belt under CMIP6 SSP-RCP Scenarios." Sustainability 13, no. 21 (2021): 12097. http://dx.doi.org/10.3390/su132112097.

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The Yangtze River Economic Belt (YREB) is an important part of China’s “two screens and three belts” strategic ecological security barrier, and the urban agglomeration along the YREB is the core of its economic development. However, it has suffered the most from frequent and severe flood disasters that were affected by torrential rains, urbanization, and human activities, with climate change intensifying the potential occurrence of flood disasters in this area. Based on the CMIP6 climate data, this study constructed a flood risk assessment index system and assessed the temporal and spatial cha

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Mu, Q., and H. Liao. "Simulation of the interannual variations of aerosols in China: role of variations in meteorological parameters." Atmospheric Chemistry and Physics Discussions 14, no. 8 (2014): 11177–219. http://dx.doi.org/10.5194/acpd-14-11177-2014.

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Abstract. We used the nested grid version of the global three-dimensional Goddard Earth Observing System chemical transport model (GEOS-Chem) to examine the interannual variations (IAVs) of aerosols over heavily polluted regions in China for years 2004–2012. The role of variations in meteorological parameters was quantified by a simulation with fixed anthropogenic emissions at year 2006 levels and changes in meteorological parameters over 2004–2012. Simulated PM2.5 (particles with a diameter of 2.5 μm or less) aerosol concentrations exhibited large IAVs in North China (NC, 32–42° N, 110–120° E

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