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CN 34-1054/N

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2024 Vol. 54, No. 5

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Earth and Space
Discovery of a geomorphological analog to Martian araneiforms in the Qaidam Basin, Tibetan Plateau
Shengxing Zhang, Yiliang Li, Wei Leng
2024, 54(5): 0501. doi: 10.52396/JUSTC-2023-0164
Article Views:509 HTML (509) Full article PDF
Abstract:
Araneiforms are spider-like ground patterns that are widespread in the southern polar regions of Mars. A gas erosion process driven by the seasonal sublimation of CO2 ice was proposed as an explanation for their formation, which cannot occur on Earth due to the high climatic temperature. In this study, we propose an alternative mechanism that attributes the araneiform formation to the erosion of upwelling salt water from the subsurface, relying on the identification of the first terrestrial analog found in a playa of the Qaidam Basin on the northern Tibetan Plateau. Morphological analysis indicates that the structures in the Qaidam Basin have fractal features comparable to araneiforms on Mars. A numerical model is developed to investigate the araneiform formation driven by the water-diffusion mechanism. The simulation results indicate that the water-diffusion process, under varying ground conditions, may be responsible for the diverse araneiform morphologies observed on both Earth and Mars. Our numerical simulations also demonstrate that the orientations of the saltwater diffusion networks are controlled by pre-existing polygonal cracks, which is consistent with observations of araneiforms on Mars and Earth. Our study thus suggests that a saltwater-related origin of the araneiform is possible and has significant implications for water searches on Mars.
Infrared microthermometry of fluid inclusion in sphalerite: A case study of the Xinqiao deposit in the Middle–Lower Yangtze metallogenic belt
Yangyang Wang, Yilin Xiao
2024, 54(5): 0502. doi: 10.52396/JUSTC-2023-0054
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Abstract:
Infrared microthermometry allows direct measurement of fluid inclusions hosted in opaque ore minerals and can provide direct constraints on the evolution of ore-forming fluids. This study presents infrared microthermometry of spherite-hosted fluid inclusions from the Xinqiao deposit in the Middle–Lower Yangtze Metallogenic Belt and sheds new light on the ore genesis of the deposit. Considering that infrared light may lead to non-negligible temperature deviations during microthermometry, some tests were first conducted to ensure the accuracy of the microthermometric measurements. The measurement results indicated that using the lowest light intensity of the microscope and inserting an optical filter were effective in minimizing the possible temperature deviations of infrared microthermometry. All sphalerite-hosted fluid inclusions from the Xinqiao deposit were aqueous. They show homogenization temperature ranging from ~200 to 350 °C, but have two separate salinity groups (1.0 wt% – 10 wt% and 15.1 wt% – 19.2 wt% NaCl equivalent). The low-salinity group represents sedimentary exhalative (SEDEX)-associated fluids, whereas the high-salinity group results from modification by later magmatic hydrothermal fluids. Combined with published fluid inclusion data, the four-stage fluid evolution of the Xinqiao deposit was depicted. Furthermore, our data suggest that the Xinqiao deposit was formed by two-stage metallogenic events including SEDEX and magmatic-hydrothermal mineralization.
Management
Live-streaming selling strategies for competitive firms
Quan Du, Zhixin Chen, Jie Wu, Xiang Ji
2024, 54(5): 0503. doi: 10.52396/JUSTC-2022-0171
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Abstract:
The booming live-streaming commerce has significantly changed the traditional e-commerce model, thus attracting much attention from both industry and academia. In recent years, an increasing number of scholars have applied analytical models to explore live-streaming strategies for firms in different scenarios. However, the previous literature mainly considers monopolists, while in the real world, competition is not rare. To fill this gap between the literature and practical observations, this paper applies a game theoretical model to study live-streaming adoption and pricing strategy for firms under competitive environments. The results show that, for competitive firms, the equilibrium strategy depends on the relation between the commission rate and the intensity of the market expansion effect. Additionally, compared to the case in which no firm adopts live-streaming, competitive firms do not always benefit from the adoption of live-streaming selling. The paper also shows that competition plays a negative role in inducing a firm to adopt live-streaming.
The influence of different types of satisfaction on loyalty on C2C online shopping platform: From the perspective of sellers and the platform
Yanan Lu, Qian Huang, Yuting Wang
2024, 54(5): 0504. doi: 10.52396/JUSTC-2022-0128
Article Views:710 HTML (710) Full article PDF
Abstract:
With the rise and development of major types of platforms, the competition for resources has become extremely fierce, and the market share of C2C platforms has been seriously threatened by the loss of resources. Therefore, building and maintaining buyers’ satisfaction and loyalty to C2C platforms is critical to the survival and sustainability of C2C platforms in China. However, the current knowledge on how platform satisfaction and loyalty are constructed in the C2C e-commerce environment is incomplete. In this study, seller-based satisfaction and platform-based satisfaction are constructed separately. We further distinguish seller-based transaction satisfaction into economic and social satisfaction and explore their antecedents and consequences. To test our research hypotheses, we conduct a survey and collect data from a real online market (Taobao website). The results show that seller-based transaction satisfaction positively affects platform-based overall satisfaction and loyalty, and that perceived product quality, perceived assurance, and perceived price fairness all have a significant effect on economic satisfaction, whereas perceived relationship quality and perceived empathy significantly influence social satisfaction. These findings help us understand the literature related to customer satisfaction in the context of C2C in China and provide inspiration for online sellers and platforms.
Evolutionary analysis of green credit and automobile enterprises under the mechanism of dynamic reward and punishment based on government regulation
Yu Dong, Xiaoyu Huang, Hongan Gan, Xuyang Liu
2024, 54(5): 0505. doi: 10.52396/JUSTC-2023-0108
Article Views:142 HTML (142) Full article PDF
Abstract:
To explore the green development of automobile enterprises and promote the achievement of the “dual carbon” target, based on the bounded rationality assumptions, this study constructed a tripartite evolutionary game model of government, commercial banks, and automobile enterprises; introduced a dynamic reward and punishment mechanism; and analyzed the development process of the three parties’ strategic behavior under the static and dynamic reward and punishment mechanism. Vensim PLE was used for numerical simulation analysis. Our results indicate that the system could not reach a stable state under the static reward and punishment mechanism. A dynamic reward and punishment mechanism can effectively improve the system stability and better fit real situations. Under the dynamic reward and punishment mechanism, an increase in the initial probabilities of the three parties can promote the system stability, and the government can implement effective supervision by adjusting the upper limit of the reward and punishment intensity. Finally, the implementation of green credit by commercial banks plays a significant role in promoting the green development of automobile enterprises.

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