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    Analysis of satellite-terrestrial frequency sharing technology for 5G and 6G mobile communication by HU Yanwei, GONG Jian, MA Zhanshu

    Published 2024-12-01
    “…With the rapid economic development and increased investment in satellite-based facilities, China's satellite communication, satellite navigation and other satellite application industries are expected to enter a period of rapid development, and the trend of building a satellite-terrestrial integrated network will become the future direction of communication development. …”
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  6. 48406

    Application of FDA Discriminant Analysis Methodin Classification of Tunnel Surrounding Rocks by CHEN Liang, HAN Aiguo, CHEN Qiang, REN Guangming

    Published 2020-01-01
    “…Aiming at the classification of tunnel surrounding rock, and taking the surrounding rock of a water conveyance tunnel in southwest China as the research object, this paper comprehensively selects 8 indicators such as uniaxial saturated compressive strength of rock, volume joint count, rock mass integrity coefficient, main structural surface occurrence, rock quality, strength-stress ratio, crack weathering.and joint set in hydropower surrounding rock classification and Q system classification as the discriminant factors to establish the corresponding Fisher discriminant model, tests the modeling data one by one by the back-substitution estimation method, with the consistency rate of 89.5%, and applies the discriminant model to the remaining sections of the tunnel to obtain the prediction results, which are consistent with the actual situation. …”
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    Research on the Statistical Properties and Stability of Complex Interindustrial Networks by Xinyu Cheng

    Published 2024-01-01
    “…This study consolidates input-output data from 42 sectors across 31 provinces and regions in China into a unified dataset for 42 industrial sectors within eight major economic zones. …”
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    Study on Quality Inspection and Anti-Seepage Performance Evaluation of Karst Underground Dam Curtain by ZHANG Kai, SU Zhengyang, LIU Chengdong, SHEN Guangze, JIAO Jie

    Published 2020-01-01
    “…There are many problems in the quality inspection and anti-seepage performance evaluation of karst underground dam's curtain because of its special structure and environment.Taking a typical karst underground dam seepage prevention system in southwest China as the research object,this paper identifies the distribution and weak parts of the anti-seepage curtain through the high-density resistivity method,further verifies the accuracy of results from high-density resistivity method through local water pressure test in borehole,and analyzes the composition and corrosion type of precipitates by precipitation thermogravimetry.This study provides a feasible plan for the current quality inspection and anti-seepage performance evaluation of karst underground dam,has a strong engineering reference significance for the popularization and application of karst underground dam and its safety assurance in the operation period,and also serves as an important reference for the establishment and improvement of the performance evaluation system and monitoring mechanism for the seepage control of underground reservoirs in karst areas.…”
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