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The Impact of Cropland Spatial Pattern Change on Grain Production in China
Li Yuanyuan, Tan Minghong, Zhang Hongqi
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 90-95 doi: 10.15302/J-SSCAE-2018.05.014
Cropland is the basis of grain production. In recent decades, the spatial pattern of cropland in China has changed significantly, which has caused some impact on grain production. Based on land cover data of 1990, 2000, and 2010, this study explored changes in the spatial pattern of cropland, and constructed a database with a spatial resolution of 1 km based on county-level agricultural statistics and soil organic matter data, which is the representative of crop productivity. The results show that: during the period from 1990 to 2010, drastic reclamation happened in Northeast and Northwest China while the cropland acreage decreased in Huang-Huai-Hai Plain; the main source of new cropland during the study period was grassland (46.9%), and the lost cropland was mainly converted to forest land (36.6%) in the first ten years and then to construction land (53.0%) in the following ten years; the changes in the spatial pattern of cropland have caused a decrease of 2.0% in the average crop productivity, and during this period, the construction land mostly occupied high-quality cropland, while the newly reclaimed cropland had lower crop productivity.
Keywords： 耕地是粮食生产的基础，近几十年来中国耕地空间格局变化显著，对粮食生产造成一定影响。本研究以1990 年土地覆被数据为基础，探究耕地空间格局变化，并基于县级农业统计数据和土壤有机质数据得到空间分辨率为1 ，在此期间建设用地多占用优质耕地，而新开垦的耕地粮食生产力普遍较低。
Zhenrui Zhang, Xinghui Xia, Zhifeng Yang
Engineering 2023, Volume 28, Issue 9, Pages 11-15 doi: 10.1016/j.eng.2022.04.014
Keywords： China city areas THE AUTHORS.Published behalf Company Engineering Education Press Academy carbon changes decades: Implications
Li Peicheng,Guo Man,Wang Lixia,Li Qilei, Xu Bin,Li Junyuan,Zheng Feimin
Strategic Study of CAE 2011, Volume 13, Issue 4, Pages 29-36
Based on 60 years' data from 22 hydrological stations in China, the dynamic changes of precipitation and temperature are analyzed by statistical method, and the correlation between precipitation and temperature was evaluated comprehensively. The main conclusions are as follows: a. Precipitation shows fluctuation in recent 60 years in China.It increases in some years and decreases in the other years, without the unified changes.b. The temperature change also has been in fluctuation.During the recent 10 to 20 years, the date from most hydrological stations shows increasing trend, but the data of some hydrological stations have shown the decreasing trend.So, it is hard to obtain a conclusion of global uniform warming.c. From the interrelationship between precipitation and temperature, in some periods or years, there was more precipitation with lower temperature, but the opposite situation also existed. Accordingly, it is difficult to draw a conclusion that temperature increase can lead to precipitation uniform increase or decrease.d. The correlativity between precipitation and temperature at most of the hydrological stations did not show significant positive or negative correlation. It shows that precipitation and temperature are likely to be conditioned by some other significant factors respectively.e. From the hydrological and meteorological analysis of China as one part of the world, we cannot conclude that global climate has the trend of changing warm.
Keywords： climate change precipitation temperature correlation analysis
Artificial Intelligence Cracks a 50-Year-Old Grand Challenge in Biology
Sean O´Neill
Engineering 2021, Volume 7, Issue 6, Pages 706-708 doi: 10.1016/j.eng.2021.04.003
Strategies for Soil Fertility Improvement of Arable Land in China
Yingjie Hu, Xiangbin Kong, Yuzhen Zhang
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 84-89 doi: 10.15302/J-SSCAE-2018.05.013
This paper systematically reviews the trends of soil fertility of arable land in China and puts forwards that the soil fertility improvement of arable land in China should realize the strategic change from single application of chemical fertilizer to the combined application of organic and inorganic fertilizers, combine cultivation with preservation to maintain soil fertility, and implement spatial differentiation control. Moreover, this paper summarizes the ways to improve the soil fertility of arable land in China, including increasing the application of organic fertilizer, promoting straw returning to the field, resuming and promoting green manure cultivation, improving the farming conditions, and optimizing the layout of agroforestry networks. At last, this paper proposes policy suggestions of implementing high-standard farmland construction projects, soil improvement and restoration projects, grass-crop rotation projects, straw returning projects, and livestock and poultry manure application projects.
Keywords： 保持土壤肥力，应实行空间差异化管控的战略思路，总结出增施有机肥、推广秸秆还田、恢复推广绿肥种植以及提升农田耕作条件和优化农田林网布局等耕地土壤肥力提升实现途径，提出了国家继续实施高标准农田建设工程、土壤改良修复工程 本文系统梳理了中国耕地土壤肥力变化态势，提出我国耕地土壤肥力提升应实现从单一施用化肥向有机无机肥相结合的战略转变，应
Li Yongan
Strategic Study of CAE 2003, Volume 5, Issue 10, Pages 1-7
By summing up the financing strategies and practices in the ten year´s construction of the Three Gorges Project, the paper analyzes thoroughly the features and characteristics of financing and capital operations in large hydropower projects. Meanwhile proposals have also been presented for the optimization of financing structure, lowering financing costs and setting up a carrier for sustainable financing and capital operations in large hydropower project construction.
Keywords： Hydropower project financing capital operations
Tu Hailing,Sun Zongtan,Yao Yuan and Xu Yuan
Strategic Study of CAE 2017, Volume 19, Issue 5, Pages 85-91 doi: 10.15302/J-SSCAE-2017.05.015
The MIT Technology Review has published "the world's top 10 breakthrough technologies" every year since 2001, focusing on the commercial potential of technologies and their positive impacts on life and society. In order to provide reference for the accurate grasp of future industry dynamics and technology trends, this article deeply analyses the 60 breakthrough technologies published in the MIT Technology Review over the past six years from the perspective of technology effects and types.
Keywords： technology review “top 10 breakthrough technologies” commerce industry society
50 Years of Missile and Space Cause in China
Zhao Shaokui
Strategic Study of CAE 2006, Volume 8, Issue 11, Pages 39-47
The paper describes the developing process of China´s missile and space cause and the great achievements made by the pioneers. Under the guidance of the scientific outlook on development and system science theory, the paper brings forward the thinking about the development of China´s missile and space activities.
Keywords： China missile space scientific development outlook game thinking
Research on the Strategy for Improving Cultivated Land Quality in China
Hongqi Zhang, Minghong Tan, Xiangbin Kong, Yongmei Xu, Erqi Xu, Erping Shang
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 16-22 doi: 10.15302/J-SSCAE-2018.05.003
Based on a systematic analysis of changes in quantity and quality of cultivated land in China, this paper put forward an overall strategic thinking of realizing three strategic transformations in the cultivated land management from the aspects of quantity, quality, and ecology of the cultivated land. Five important measures, including enhancing the cultivated land quantity in China, curbing undisciplined growth of construction land, improving the fertility of cultivated soil, preventing and controlling heavy metal pollution of soil, and preventing and controlling agricultural film pollution, were proposed. It was also recommended that four major projects, namely middle- and low-yield farmland reforms, comprehensive improvement of rural land, comprehensive reparation of heavy metal pollution of soil, and soil and water conservation, sand prevention, and saline soil improvement, should be implemented as soon as possible.
Keywords： cultivated land quality temporal and spatial change strategy major projects
Chinese Top Ten Science and Technology Progress News Announced in 2000 by Academicians
Strategic Study of CAE 2001, Volume 3, Issue 1, Pages 94-94
The Deep Carbon Observatory: A Ten-Year Quest to Study Carbon in Earth
Craig M. Schiffries, Andrea Johnson Mangum, Jennifer L. Mays, Michelle Hoon-Starr, Robert M. Hazen
Engineering 2019, Volume 5, Issue 3, Pages 372-378 doi: 10.1016/j.eng.2019.03.004
Changjiang Academy of Sciences with Brilliant Achievements
Strategic Study of CAE 2001, Volume 3, Issue 10, Pages 90-92
Study on the Spatial Patterns of the Qinba Mountain Area Based on High-Speed Transportation Networks
Wu Tinghai and Zhang Neng
Strategic Study of CAE 2016, Volume 18, Issue 5, Pages 52-59 doi: 10.15302/J-SSCAE-2016.05.008
Improving regional accessibility is an important mean to carry out poverty alleviation and realize sustainable development in the Qinba Mountain Area of China. This paper studies the accessibility of central cities in the Qinba Mountain Area to surrounding urban agglomerations, and determines the spatial patterns of the region by using the high-speed transportation network identified in National Highway Network Planning (2013—2030) and China's Medium and Long Term Railway Network Planning. The study finds that with the development and construction of the rapid transit network planned by our country, three main radial urban corridors from Xi'an to Wanzhou, Xiangyang, and Luoyang, separately and three secondary urban corridors, namely, the Xi’an—Tianshui, Xi'an—Guangyuan, and Dazhou—Xiangyang—Nanyang—Luoyang corridors will be formed, in Qinba Mountain Area. These urban corridors will lead to the emergence of four vast green fields which are taking Longnan, Bazhong, Shiyan, and Luanchuan as the core. This paper suggests that the future spatial planning should establish the spatial order in the Qinba Mountain Area and arrange the urban corridors and the vast green fields properly to achieve a balance between protection and development.
Keywords： the Qinba Mountain Area spatial patterns high-speed transportation network spatial planning urban corridor vast green fields
Global Top Ten Engineering Achievements 2021
Junzhi Cui
Engineering 2021, Volume 7, Issue 12, Pages 1651-1652 doi: 10.1016/j.eng.2021.11.001
Sun Gennian,Ma Lijun
Strategic Study of CAE 2007, Volume 9, Issue 6, Pages 32-37
The SARS in 2003 is a public health crisis in China. The passenger transport witnesses serious landslide and suffers a heavy loss. In this article, the loss of passenger transport and its regional difference impacted by SARS are analyzed and estimated. The loss of passenger transport is nearly 1. 007 billion person- times in 2003 impacted by SARS crisis, in which the highway transportation loss is 888 million, the railway loss is 105 million, the aviation is 16. 12 million and water carriage is 19. 43 million. As a short breaking event, it starts from March in 2003 for the crisis formation, breaks out in whole from May to June, and enters the decay and comeback from July to August, and has a compensating from November to December after the crisis. Due to the difference in transport location and epidemic situation, the loss of passenger transport impacted by SARS in 28 provinces in China can be classified into 4 types. Guangdong, Sichuan and Hebei suffer the most and the loss is over 100 million person-times. The relativity analysis is carried out based on the loss of transportation, cardinal number in 2003 and the number of infect person of SARS, and a new spatial forecast model is put forward for space forecast in transport crisis. The model shows that the marginal coefficient of transportation cardinal number is 0. 788 46, the marginal coefficient of SARS patients is 0. 075 868.
Keywords： SARS crisis background trend line loss of transportation terrain distribution spatial model
Title Author Date Type Operation
The Impact of Cropland Spatial Pattern Change on Grain Production in China
Li Yuanyuan, Tan Minghong, Zhang Hongqi
Journal Article
Soil Organic Carbon Changes in City Areas of China Over the Past Three Decades: Implications for Achieving Carbon Neutrality
Zhenrui Zhang, Xinghui Xia, Zhifeng Yang
Journal Article
Research of dynamics and relationship of precipitation and temperature in the recent 60 years in China
Li Peicheng,Guo Man,Wang Lixia,Li Qilei, Xu Bin,Li Junyuan,Zheng Feimin
Journal Article
Artificial Intelligence Cracks a 50-Year-Old Grand Challenge in Biology
Sean O´Neill
Journal Article
Strategies for Soil Fertility Improvement of Arable Land in China
Yingjie Hu, Xiangbin Kong, Yuzhen Zhang
Journal Article
Financing & Capital Operations of Large Hydropower Projects——A Summary Review of Financing Strategies & Practices in Three Gorges Project
Li Yongan
Journal Article
Analysis and Insights from the MIT Technology Review “Top 10 Breakthrough Technologies” in the Past Six Years
Tu Hailing,Sun Zongtan,Yao Yuan and Xu Yuan
Journal Article
Research on the Strategy for Improving Cultivated Land Quality in China
Hongqi Zhang, Minghong Tan, Xiangbin Kong, Yongmei Xu, Erqi Xu, Erping Shang
Journal Article
Chinese Top Ten Science and Technology Progress News Announced in 2000 by Academicians
Journal Article
The Deep Carbon Observatory: A Ten-Year Quest to Study Carbon in Earth
Craig M. Schiffries, Andrea Johnson Mangum, Jennifer L. Mays, Michelle Hoon-Starr, Robert M. Hazen
Journal Article
Study on the Spatial Patterns of the Qinba Mountain Area Based on High-Speed Transportation Networks
Wu Tinghai and Zhang Neng
Journal Article
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