Subjects: Statistics >> Social Statistics submitted time 2024-05-18 Cooperative journals: 《中国科学院院刊》
Abstract： Urbanized areas are areas whose main function is to provide industrial and service products. During the 15th Five-Year Plan period, the urbanization rate of China’s population will exceed 70 percent, thus entering a long-time stage of high urbanization levels. The strategic positioning of urbanized areas will be defined as county-level administrative districts with a high concentration of scientific and technological innovation resources, new quality productivity, and new-type industrialization. In terms of strategic layout, the scope of urbanized areas will be optimized to promote the concentration of population and economy in urban agglomerations, metropolitan areas, and central cities, and to strengthen the suburbanization of mega cities, as well as the integrated development of urban and rural areas. In terms of functional upgrading, it will promote the layout of new quality productivity and new industrialization in different urbanized areas according to their comparative advantages, and strengthen the leading role of Beijing-Tianjin-Hebei, the Yangtze River Delta, the Pearl River Delta, and Chengdu-Chongqing area. In terms of spatial quality, it is necessary to promote the livability, intelligence, and resilience of cities.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Underwater acoustic detection technology is the most important research direction on underwater acoustic signal processing and sonar filed, and is the key technology on marine applications for environment aware, ocean surveillance, resource exploration, information acquisition and so on. This paper gives a brief introduction on the current status of underwater acoustic detection. With scientific problems in practice, the new concept, new method, and new trend of this field are presented. Subsequently, the important effect of underwater acoustic detection development on national security and economic progress is analyzed and prospected.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The cross-border railways and oil and gas pipelines along the China-Mongolia-Russia Economic Corridor are key hubs and channels supporting the regional cooperation and development. It is very important to complete scientific regionalization of ecological risk of China-Mongolia-Russia Economic Corridor and put forward suggestions to guarantee smooth construction and safe cross-border traffic project. By establishing ecological risk evaluation model, we quantitatively analyzed the ecological risk of China Mongolia#2;Russia Economic Corridor, and regionalized high, middle, and low risk. We put forward the ecological risk prevention and control countermeasures for China-Mongolia-Russia Economic Corridor. It shows that the ecological risk areas are distributed along the “two belts and one line”. The risk of desertification is along the China-Mongolia-Russia cross-border traffic belt, the risk of permafrost is along the China-Russia cross-border traffic belt and the China-Russian crude oil pipeline. The proposed suggestions are designated to prevent and control ecological risk from the perspectives of promoting ecological civilization to realize a “two-highs and three-lows” mode; constructing of a green economic corridor, optimizing the industrial structure, actively establishing a four-tier circular economy system, and developing green circular industries; innovating technical biological engineering; establishing system and mechanism of an international cooperation and monitoring ecological risk network system along China-Mongolia-Russia Economic Corridor. We provide scientific technic support for rationally building cross-border railways and pipelines, avoiding and preventing ecological risks in China#2;Mongolia-Russia Economic Corridor. It will be decision-making basis to promote regional green and sustainable development.
Subjects: Biology >> Bioengineering submitted time 2018-02-11 Cooperative journals: 《中国生物工程杂志》
Abstract：目的：制备负载NGF的可注射壳聚糖透明质酸复合水凝胶，探讨其理化性能以及生物相容性。方法：首先京尼平交联制备壳聚糖透明质酸复合水凝胶材料，采用倒置法检测凝胶时间；扫描电镜观察材料形态结构；NGF释放实验、体外溶胀以及降解实验等检测凝胶材料的物理化学性能；通过MTT实验、NGF活性检测、材料与细胞共培养检测凝胶材料生物学性能。结果：在37℃条件下，可注射凝胶材料凝胶时间在37min左右，凝胶材料为多孔网络状结构，凝胶材料8周最多能够降解76％，缓释21天的NGF具有生物活性，凝胶材料能促进RSC96细胞的粘附、增殖、迁移以及细胞活性物质的释放。结论：京尼平交联的壳聚糖透明质酸水凝胶具有良好的生物相容性，能作为NGF的载体材料，具有成为神经导管内填充材料的潜能。
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