Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： The arid region of Northwest China is one of the driest regions in the world and is characterized with severe water scarcity.Water shortage is the most critical natural factor limiting the high-quality economic and social development and ecological security in the arid region of Northwest China. Based on the long-term monitoring data from the field stations of Chinese Academy of Sciences, observation data of meteorological stations, water resources bulletin and the remote sensing data, this study systematically analyzes the basic characteristics of water resources and ecological environment in the arid region of Northwest China, assesses the changing trends of hydrological elements, water resources, and ecological environment. Besides, this study analyzes the changes of water resources carrying capacity in terms of water use structure and water resources utilization efficiency, and puts forward some suggestions on sustainable water resources utilization and ecological and environmental protection. The results show that the temperature in the arid region of Northwest China has increased at a rate of 0.32℃/decade and precipitation has increased at a rate of 9.32 mm/decade. The glaciers are shrinking at accelerating rate and the runoff supplied by glacier/snow meltwater has increased. The amount of water resources has increased by about 11 billion m3 since the mid-1990s. In the past decade, water use efficiency has been improved, water-saving irrigation area has been expanded, and agricultural water production efficiency has been improved due to water conservation and utilization measures. Water environment capacity has been increased, water carrying capacity has been enhanced, surface water area has been expanded, and the ecosystem condition has improved. However, water resources problems are still prominent in the arid region of Northwest China, the intensity of extreme climate and hydrological events has increased, and the ecological environment is still fragile. In the future, it is necessary to further explore the water resources potential of this region, improve the water resources management, and enhance ecological protection and restoration efforts for better adaptation to the possible risks of climate change, so as to provide scientific and technological support for promoting the construction of the “Green Silk Road” and realizing high-quality regional economic and social development.
Subjects: Psychology >> Social Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： As the rapid development of Internet, danmaku video emerges. This user-video interactive mode has new features, such as real-time dynamic emotion expression and multimodal emotion distribution. Meanwhile, the new features also bring challenges to practical research work, for instance, user portrait depiction is more difficult, video recommendation and advertising need to be more accurate. Existing research has not yet deeply analyzed new features of danmaku video, nor fully explored the academic research value for itself. Based on the theories of psychology, marketing, and some other interdisciplinary frontier knowledge, as well as combined with deep learning, natural language processing technology and system dynamics method, this study attempts to analyze and model danmaku video data from a data-driven perspective, for deeply mining the potential business value of video big data. The objective of the study is to create a high-quality online video intelligent marketing platform. A sentimental recognition approach is proposed to capture the internal relationship between sentimental features of danmaku text and visual sentimental features of video, so as to represent users’ sentiment. Considering the influence of users’ dynamic emotion on behavior, the dynamic user portrait with sentimental features is constructed to describe full picture of user characteristics, as well as to explore the access logic and behavioral preferences that are hidden behind behavior data. By positioning user roles, the sticky marketing mechanism of online video platform is established. Furthermore, focused on different advertisement types, like creative ads, interstitial ads and oral ads, this study explores the impact of video ads on the emotional and psychological changes of users, reveals the correlation between users’ sentiment changes and video ads insertion mode, and thus puts forward the “content customized” dynamic advertising strategy for danmaku video. It not only enriches the existing research, but also provides theoretical guidance and decision-making support for online video platforms to accurately locate and analyze user demands. In particularly, the contributions of the study include: (1) Previous research on marketing strategy of online video platform mainly focused on platform pricing, brand reputation and user satisfaction, ignoring external stimulus factors, such as dynamic factors of user behavior and emotional changes caused by danmaku video advertising. This paper combines big data of danmaku video to analyze users’ emotional responses to the external stimuli. Based on multimodal attention fusion, the hierarchical deep association co-attention model is designed to achieve users’ sentiment recognition. The paper reveals the correlation between video ads and users’ emotional changes, proposes the dynamic intercutting strategy of customized video ads, innovates the video advertising marketing model, and helps advertisers to enhance the brand marketing value; (2) The traditional method of constructing user portrait does not focus on the strong correlation among users’ sentiment, natural attribute and behavior. To this end, the study is driven by the sticky marketing of online video platform. Based on three dimensions of users’ sentiment, natural attribute and behavior, a dynamic user portrait model with four modules of basic data, behavior modeling, service application and evaluation feedback is established. Considering user demand and dynamic user portrait, the model of sticky marketing mechanism is constructed to recommend rich content options for users, to increase users’ stickiness and to prolong users’ usage time in online video platform. Thus, it forms a benign marketing mode of flow closed loop and completes the flow transformation between user value and content value in online video platform. Through this study, user needs will be met from a higher quality level, the accuracy of video advertising will be comprehensively improved, and the marketing value can be maximized in online video platform.
Subjects: Geosciences >> Geography submitted time 2020-01-06 Cooperative journals: 《干旱区地理》
Abstract：定量评估水资源开发潜力对掌握区域水资源开发现状、提高水资源利用率具有重要意义。通过选取水资源利用率、灌溉率、地表水控制率、人均占有水量、重复利用率、生活用水定额、供水量模数、生态环境用水率等8个重要指标，借助模糊综合评价模型对中亚五国水资源开发潜力进行定量分析。结果表明：中亚地区整体水资源开发利用处于中级阶段，开发潜力综合评分值为0.502 7，表明开发潜力较大。其中，哈萨克斯坦水资源综合评分值最高，为0.712 4，有很大的开发潜力，但要注意摒弃不合理的水资源利用方式；吉尔吉斯斯坦和塔吉克斯坦综合评分值分别为0.591 1、0.488 7，有较大的开发潜力，但应注意由广度开发逐渐向深度开发转变。下游国家土库曼斯坦和乌兹别克斯坦处于开发利用的高级阶段，综合评分值分别为0.352 6、0.315 0，水资源开发潜力较小。今后应注意发展节水型经济，注重水资源综合管理。
Subjects: Geosciences >> Geography submitted time 2019-01-11 Cooperative journals: 《干旱区地理》
Abstract：本研究采用博斯腾湖流域1970—2014年的气象站点数据及Penman-Monteith公式计算潜在蒸散发（ET0），对比分析了流域山区和平原区ET0的时空变化及对主要气象因子的不同影响。结果表明：1）在年际尺度上，山区ET0在1970—2000年整体呈波动下降的趋势（P<0.01），2000年开始，ET0呈现略微上升的趋势；平原区ET0在1970—1993年间以-77 mm/10a的速率呈减小的趋势（P<0.01），1993年之后逆转为以83.8 mm/10a的速率呈上升趋势（P<0.01），平原区的变化明显强于山区。2）季节上呈现夏季为流域ET0最高的季节，是年变化的主要贡献者；而变化趋势则表现为平原区春季和夏季ET0大于山区，秋季和冬季略小于山区。3）ET0变化对净辐射和风速最为敏感，同时，山区净辐射和风速对ET0变化的贡献率最大，平原区影响ET0变化的主导因素是风速，风速对ET0的贡献率均超过50%。
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