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Grass-roots sports events in the context of the new era are gradually becoming an important influence on the conditions of urban economic development, accompanied by the introduction and practice of relevant strategies and national development goals. Sport is becoming an increasingly important part of people’s daily healthy lives. In-depth studies have found that the organization of sports events can lead to the development of related industries, and there is an important catalyst for urban economic development. However, the organization of grassroots sports events and how to truly leverage the role of sports events as a catalyst for urban development faces a series of huge problems. Therefore, government departments relevant organizations, and even individuals need to make concerted efforts to support the operation and development of urban grassroots sports events through specific and effective methods, to strengthen win-win cooperation, to attach importance to the positive role of sports events in urban development, and ultimately to give full play to the role of grassroots sports events in the context of the new era in the promotion of the city’s economic development.

Doped‐metal oxide‐based memristors, with the potential for improved switching performance and capability for multi‐bit information storage, are attractive candidates in the implementation of artificial neural network (ANN) hardware systems. However, performance and process considerations such as switching behavior and complementary‐metal‐oxide‐semiconductor (CMOS) process compatibility remain a challenge. This study shows that amorphous Zr‐doped HfO2 (HZO) memristors fabricated via a co‐sputtering approach improve the switching performance by providing a controllable knob to modulate defects in the switching layer. At the same time, it satisfies the CMOS process compatibility requirements for industry adoption. HZO memristors with optimized stoichiometry exhibit 30% reduced switching voltages and 50% faster switching as compared to control HfO2 memristors. Concurrently, this study shows that high linearity analog states tuning is achievable via a programming scheme that utilizes voltage pulses with increasing amplitudes. This study further shows via simulation evaluation that HZO memristors implemented in a self‐organizing‐map (SOM) network for Fashion MNIST database classification, achieve an accuracy of 92% with short training cycles. The results thus pave a potential pathway for further development of CMOS process compatible HZO memristors for use in future storage and computing applications. [ABSTRACT FROM AUTHOR]

Natural gas is considered a transitional energy source in the transition to clean energy owing to its clean, efficient, and ecologically beneficial properties. The trade of liquefied natural gas (LNG) serves as the backbone of the global natural gas trade and significantly influences the dynamics of the global energy trade system. This paper constructs long-term global LNG trade networks, and explores the spatiotemporal evolution and topological structures of the international LNG trade by utilizing multilevel network analysis methods, to provide insights for comprehensively understanding the market dynamics of the global LNG trade system. The findings indicate the following: (1) The global LNG trade volume shows an overall upward trend, and the global LNG trade network exhibits uneven spatial distribution, clear hierarchical differentiation, and an increasingly complicated structure. Global LNG trade is gradually changing from regionalization to globalization, and the international LNG market is undergoing structural reshaping. (2) The global LNG trade network continues to expand in size and density, and the rapidly growing LNG supply and trade relations are driving the formation of the global natural gas market. (3) Global LNG trade is still in a phase of rapid change, with the global efficiency of the network increasing and then decreasing. The trade network has traditionally been centered on ten countries, including Japan, South Korea, the United States, and Qatar. (4) The global LNG trade network exhibits clear core-periphery structures with considerable polarization effects, and the trade network structure is continuously evolving and is growing unbalanced. Finally, we put forward relevant policy suggestions to promote global LNG trade interconnectivity and enhance environmental protection and respond to global climate change. [ABSTRACT FROM AUTHOR]

In order to investigate the effects of fiber on the performance of 3D printing concrete (3DPC), the influence of fiber on the rheological properties, printing properties, mechanical properties, and pore structure of 3 DPC were studied by adding PVA fiber, PP fiber, and sisal fiber. The result of the rheological property test shows that the static yield stress of 3DPC increases linearly with the content of three kinds of fiber, but the influence of fiber on the rheological property of 3DPC is different. The results of printing performance test indicate that the addition of PVA fiber reduces the extrudability of 3DPC, but it significantly improves the size uniformity of extruded concrete. The test results of mechanical properties and pore structure point out that PP fiber significantly improves the compressive strength of 3DPC, sisal fiber has the most significant strengthening effect on the flexural strength of 3 DPC, and the increase of fiber content will reduce the apparent density of 3 DPC and increase the internal porosity, resulting in the reinforcement effect of high fiber content is weaker than that of low fiber content. [ABSTRACT FROM AUTHOR]