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Analysis on the Trade Situation and Reasonable Import Scale of China’s Agricultural Products
Yang Liu, Qiyou Luo, Liyang Ma, Qing Zhang
Strategic Study of CAE 2018, Volume 20, Issue 5, Pages 128-134 doi: 10.15302/J-SSCAE-2018.05.019
To fully utilize both domestic and overseas markets and resources, which was put forward by the Party Central Committee and the State Council, it's of great significance to accurately analyze the trade situation of agricultural products in China and scientifically grasp the reasonable scale of the import of agricultural products. This paper analyzes the general situation changes and driving factors of China’s agricultural products trade after China’s entry into WTO, and probes into the current situation of China’s major agricultural products trade in terms of varieties and markets. Furthermore, we estimates the reasonable import scale of major agricultural products in 2025 and 2030, such as wheat, rice, corn, cotton, sugar, soybean, vegetable oil, pork, beef, mutton, poultry meat, and aquatic products. Policy proposals of ensuring the basic supply of grain and bulk agricultural products at home, adopting active import strategy, improving the international agricultural product market monitoring and import early-warning mechanism, and promoting the “going global” strategy of agriculture are put forward.
Reasonable Scale of Megacity Central Area Based on Multivariate Data and a Traffic Perspective
Lu Huapu, Bai Zhuotong,Wu Zhouhao, Fu Zhihuan
Strategic Study of CAE 2022, Volume 24, Issue 6, Pages 146-153 doi: 10.15302/J-SSCAE-2022.06.013
The central area of a megacity, which features high-intensity development, large population density, and concentrated urban functions, demonstrates the most prominent urban problems. Addressing the urban malaise in megacities necessitates analyzing and demonstrating the reasonable scale of the megacity central area. This study proposes that commuting time is the core controlling factor determining the reasonable scale of the megacity central area. Combining with point of interest data of multi-type land use and the geographic information system data for street administrative division, we identified the current central urban areas of ten cities in China using big data analysis and the clustering method; their current traffic efficiencies were then evaluated based on path navigation data via web maps and mobile phone signaling data verification. Finally, demonstration results were presented through quantitative analysis. Our study shows that the current central areas of the ten megacities cannot satisfy residents' need for a proper commuting time; considering factors such as technological development and improvement in the level of governance, 13‒15 km is the upper limit of equivalent radius for the central area of a megacity.
Keywords： reasonable scale multivariate data central urban area megacity happiness
Agricultural Resource Balance and International Import Potential of China by 2050
Zheng Haixia, You Fei, Luo Qiyou, Tang Huajun
Strategic Study of CAE 2022, Volume 24, Issue 1, Pages 20-28 doi: 10.15302/J-SSCAE-2022.01.003
The balance of supply and demand for agricultural resources in China is becoming increasingly tight due to the multiple effects of high-quality agricultural production, transformation and upgrading of food consumption structure, and climate change. Therefore, it is crucial for China to integrate the international and domestic resources and markets to ensure food security in the medium and long term. Based on a comparative analysis of agricultural resources in China and abroad, we investigate food consumption demand, consumption structure, and supply structure in China by 2035 and 2050. The agricultural resource utilization targets for China by 2035 and 2050 are proposed based on an analysis of the agricultural resource supply-demand gap as well as import potentials and sources of virtual water and virtual arable land. We find that the import of virtual arable land by China will reach a peak around 2048, with nearly 6.147×107 hm2. Virtual water imports will reach a peak around 2045. If estimated by blue water, virtual water imports will be 1.136×108 m3, accounting for 30% of the total agricultural water consumption in 2017. The increase in the import potentials of China’s arable land will mainly come from South America and Africa.
Keywords： agricultural resource balance food consumption structure virtual water virtual arable land import potential
Reasonable Rated Voltage of High and Medium Power Adjustable-Speed Drives for Energy Saving
Ma Xiaoliang
Strategic Study of CAE 2001, Volume 3, Issue 11, Pages 80-84
A large amount of energy will be saved if adjustable-speed drives are adopted by high and medium power pumps and fans. The power range of most of the drives is within 0.2～2 MW. The rated voltage of most of the motors in the power range is 10 kV because the power supply is 10 kV. The adjustable-speed scheme, a 10 kV motor is fed by a 10 kV inverter, is not reasonable because this kind of inverter consists of a lot of power electronic devices in series and its cost is high and reliability is poorer than lower voltage one. Owing to the existence of input transformer of the inverter, it is not necessary to ask for that the rated voltage of the motor and inverter is the same as power supply, i. e. a lower rated voltage can be used for the motor and inverter. The reasonable rated voltages of motors and inverters with different power grades are investigated and the by-pass methods when the rated voltages of the motors are different from power supply are discussed in this paper.
Keywords： high and medium power adjustable-speed drives for energy saving reasonable rated voltage low voltage inverters medium voltage inverters by-pass
Zhang Jianmin,Xiao Rucheng
Strategic Study of CAE 2004, Volume 6, Issue 12, Pages 37-42
In this paper, a model for spatial nonlinear optimization programming to obtain the prestresses of cables in the cable-stayed bridge is established, in which the bending strain energy of the beams for the bridge and the cable tower is the objective function, and structural stresses and the cable forces are the constraint conditions. In order to determine the prestresses of the cables of the bridge, the first order optimization method is used to solve the program. This method is used to obtain set of optimal cable tensions of a thousand-meter scale cable-stayed bridge under permanent loads, and the result of analysis showed that the method is easy to apply and effective.
Keywords： cable-stayed bridge first order optimization method reasonable finished dead state
Extreme-scale parallel computing: bottlenecks and strategies None
Ze-yao MO
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 10, Pages 1251-1260 doi: 10.1631/FITEE.1800421
Extreme-scale numerical simulations seriously demand extreme parallel computing capabilities. To address the challenges of these capabilities toward exascale, we systematically analyze the major bottlenecks of parallel computing research from three perspectives: computational scale, computing efficiency, and programming productivity. For these bottlenecks, we propose a series of urgent key issues and coping strategies. This study will be useful in synchronizing development between the numerical computing capability and supercomputer peak performance.
Keywords： Extreme scale Numerical simulation Parallel computing Supercomputers
The lean forming technology for auto sheet metal
Lin Zhongqin,Li Shuhui,Wang Wurong,Lai Xinmin
Strategic Study of CAE 2009, Volume 11, Issue 11, Pages 22-29
The lean forming technology for auto sheet metal has been proposed, which consists of a proper material selection method considering the forming characteristic, a hybrid optimization methodology for effective drawbead force design and an experiment platform with the control of variable blank holder force. Aiming at decreasing the forming sensitivity to variation in materials and process, a forming robust design methodology has been studied. The technical framework for auto sheet metal lean forming was constructed based on the idea of proper material selection, process optimization and robust control. Through more than 10 years of application in Baosteel and some automobile plants, 50 % market sharing has been targeted for Baosteel auto steel sheet, which effectively promotes the development of application technologies for home-made auto sheet metal.
Keywords： auto sheet metal lean forming proper material selection process optimization robust control
Application of the “Massive Customization” Production Mode in Iron and Steel Enterprises
Zhou Shichun,Ding Jianhua,Chen Chao
Strategic Study of CAE 2006, Volume 8, Issue 3, Pages 1-6
In this paper, the conflict between individual needs of market and the efficient mass production requirement of manufacture under the background of market globalization is discussed, a trend that the main production mode for domestic steel industry should be the “mass customization” is pointed out. Summarizing the practice of Baosteel Co .Ltd. on production mode since 1980s,the need and the favorable conditions of putting the new production mode into practice in Baosteel are illustrated and the problems to be settled are remarked.
Keywords： market production mode mass customization
Gai Junyi
Strategic Study of CAE 2003, Volume 5, Issue 5, Pages 1-6
The serious soybean supply problem was called for attention according to an analysis of current soybean production in China and growing import from outside world. It was pointed out that for ensuring soybean supply, the only way is to keep basically self-sufficiency with some reasonable amount of supplement from import as soybean has been being the most important nutrition source in the long Chinese history and has taken the unsubstitutional position in modern food processing industry. Based on the above facts, five facets of suggestions and measures for developing domestic soybean production were raised. Furthermore, on expanding and enhancing the most important and powerful technological aspect, soybean breeding and genetics, four suggestions were put forward for the related authority^ reference. They are： (1) to further establish and improve the soybean cultivar development and breeding research systems; (2) to further establish and optimize the soybean research team with multiple discipline interaction and research atmosphere; (3) to organize some breakthrough programs with multiple disciplinary cooperation, such as those in high yield ideal type establishment, hybrid soybean production and utilization of heterosis, and creation of specific quality trait mutants; and (4) to establish an advanced soybean genomic study program for future improvement of breeding technologies.
Keywords： soybean production supply security import control management for development genetic improvement
Rational Distribution of Water Resources of North China and South-to-North Water Diversion
Pan Jiazheng
Strategic Study of CAE 2000, Volume 2, Issue 10, Pages 26-32
According to the present status of China´ s water resources and the needs of sustainable development, it is imperative and possible to carry out the south-to-north water diversion project, that is to divert water from the Yantze River valley, which has plentiful water resources, upward to the north part of China.
The principle of south-to-north water diversion should be as follows： Establish the sociaty of water-saving, do not supply water according to the “exaggerated needs”； distribute water rationally, and pay attention to tapping the potential; the east and weet water diversion routes are existing side by side and playing a part together, not irreconcilable to each other; make budget estimate in a practical and realistic way, avoiding endless supplementary budgets; the partial and local interests must be subordinated to the interests of the whole, and the temporary interests, subordinated to the long-term enes; implement unified management, scientific allocation and the charginy system for use of water resources; to divert water from the southwest region is not realistic, better to put off.
Keywords： water resources sustainable development south-to-north water diversion
Liu Yufei, Kong Dejing, Qu Xianming
Strategic Study of CAE 2018, Volume 20, Issue 4, Pages 118-121 doi: 10.15302/J-SSCAE-2018.04.019
Driven by market demands and the artificial intelligent technology, mass customization is emerging. It thus becomes significant to analyze the influence of artificial intelligent technology on the development trend of the mass customization service mode and to summarize the breakthroughs of key technologies that need to be made in the future. Through case studies and expert interviews on furniture, household appliances, clothing and automobile industries, this paper analyzes the development trends of multiple key technologies such as multi-source cross-media heterogeneous database construction, a big-data-based design requirement feature mining system, a virtual experience system and virtual manufacturing, and whole-process information automatic collection, according to various market demands. Suggestions are proposed for popularizing the mass customization service mode integrated with artificial intelligent technology from aspects of top-level design, enterprise, talent and finance.
Keywords： artificial intelligence development planning mass customization service mode
Genetic Engineering Aims to Take a Bite Out of Insect Pests
Chris Palmer
Engineering 2022, Volume 18, Issue 11, Pages 6-8 doi: 10.1016/j.eng.2022.09.004
Issues on the Scalability in Designing a Massively Parallel Processor
Lu Xicheng
Strategic Study of CAE 2000, Volume 2, Issue 10, Pages 105-109
The massively parallel processor (MPP) has been designed to meet the requirements for the high performance computing in many application fields of both national defense and economy. The structural scalability and the friendly programming are the two important and conflicting goals in designing a MPP system. Based on practice, the issues on the scalable design of MPPs are discussed in this paper.
Jin Chunpeng
Strategic Study of CAE 2015, Volume 17, Issue 3, Pages 56-59
Wind energy is abundant （especially in coastal areas） that provides large space for wind power development. The application of large scale non-grid-connected wind power is one of the ways to multi-directional developing wind power. This paper analyzes the distribution and exploitation of wind resource in Jiangsu coastal areas，studies on industrial chain of “applying non-grid-connected wind power to high energy consumption industries” under the instruction of non-grid-connected wind power theory，and puts forward some suggestions for constructing industrial bases of non-grid-connected wind power in Jiangsu coastal areas.
Keywords： offshore wind power； multi energy cooperative supply； hydrogen（oxygen） production； industrial base
Weights-Based Gravity Energy Storage Looks to Scale Up
Sean O´Neill
Engineering 2022, Volume 14, Issue 7, Pages 3-6 doi: 10.1016/j.eng.2022.05.007
Title Author Date Type Operation
Analysis on the Trade Situation and Reasonable Import Scale of China’s Agricultural Products
Yang Liu, Qiyou Luo, Liyang Ma, Qing Zhang
Journal Article
Reasonable Scale of Megacity Central Area Based on Multivariate Data and a Traffic Perspective
Lu Huapu, Bai Zhuotong,Wu Zhouhao, Fu Zhihuan
Journal Article
Agricultural Resource Balance and International Import Potential of China by 2050
Zheng Haixia, You Fei, Luo Qiyou, Tang Huajun
Journal Article
Reasonable Rated Voltage of High and Medium Power Adjustable-Speed Drives for Energy Saving
Ma Xiaoliang
Journal Article
Spatial Nonlinear Analysis of the Reasonable Cable Tension for a Thousand-meter Scale Cable-stayed Bridge Under Permanent Loads
Zhang Jianmin,Xiao Rucheng
Journal Article
The lean forming technology for auto sheet metal
Lin Zhongqin,Li Shuhui,Wang Wurong,Lai Xinmin
Journal Article
Application of the “Massive Customization” Production Mode in Iron and Steel Enterprises
Zhou Shichun,Ding Jianhua,Chen Chao
Journal Article
Expanding and Enhancing the Research Allocation on Soybean Breeding and Genetics for the Establishment of Market Supply Based on Domestic Production
Gai Junyi
Journal Article
Rational Distribution of Water Resources of North China and South-to-North Water Diversion
Pan Jiazheng
Journal Article
Research on Development of Mass Customization Service Mode Integrated with Artificial Intelligent Technology
Liu Yufei, Kong Dejing, Qu Xianming
Journal Article
Offshore wind power development and hydrogen（oxygen） production industrial base construction in multi energy cooperative supply system
Jin Chunpeng
Journal Article
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