Search scope:
排序： Display mode:
Survey of autonomous guidance methods for powered planetary landing Review
Zheng-yu Song, Cong Wang, Stephan Theil, David Seelbinder, Marco Sagliano, Xin-fu Liu, Zhi-jiang Shao,zycalt12@sina.com
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 5, Pages 649-808 doi: 10.1631/FITEE.1900458
Keywords： 自主制导方法；定点软着陆；动力下降；非线性规划
SpaceX Starship Lands on Earth, But Manned Missions to Mars Will Require More
Chris Palmer
Engineering 2021, Volume 7, Issue 10, Pages 1345-1347 doi: 10.1016/j.eng.2021.08.005
Haitao Yu,Baolin Tian,Zhen Yan,Haibo Gao,Hongjian Zhang,Huiqiang Wu,Yingchao Wang,Yuhong Shi,Zongquan Deng
Engineering 2023, Volume 20, Issue 1, Pages 120-133 doi: 10.1016/j.eng.2022.05.015
The reusable launch vehicle (RLV) presents a new avenue for reducing cost of space transportation. The landing mechanism, which provides landing support and impact absorption, is a vital component of the RLV at final stage of recovery. This study proposes a novel legged deployable landing mechanism (LDLM) for RLV. The Watt-II six-bar mechanism is adopted to obtain the preferred configuration via the application of the linkage variation approach. To endow the proposed LDLM with advantages of large landing support region, lightweight, and reasonable linkage internal forces, a multi-objective optimization paradigm is developed. Furthermore, the optimal scale parameters for guiding the LDLM prototype design is obtained numerically using the non-dominated sorting genetic algorithm-II (NSGA-II) evolutionary algorithm. A fully-functional scaled RLV prototype is developed by integrating the gravity-governed deploying scheme to facilitate unfolding action to avoid full-range actuation, a dual-backup locking mechanism to enhance reliability of structure stiffening as fully deployed, and a shock absorber (SA) with multistage honeycomb to offer reliable shock absorbing performance. The experimental results demonstrate that the proposed LDLM is capable of providing rapid and smooth deployment (duration less than 1.5 s) with mild posture disturbance to the cabin (yaw and pitch fluctuations less than 6°). In addition, it provides satisfactory impact attenuation (acceleration peak less than 10g) in the 0.2 m freefall test, which makes the proposed LDLM a potential alternative for developing future RLV archetype.
Keywords： Reusable launch vehicle (RLV) Deployable mechanism Optimization design
Land-Sea Integration Engineering and Technology Development Strategy
Task Force for the Study on Development Strategy of China’s Marine Engineering and Technology Land-Sea Integration Research Group
Strategic Study of CAE 2016, Volume 18, Issue 2, Pages 49-54 doi: 10.15302/J-SSCAE-2016.02.005
Land-sea integration engineering refers to the engineering projects involving overlapping elements of land and sea and play significant roles in the development and operation of these domains, including ports, bridges and tunnels, and land reclamation and others. In recent years, land-sea integration engineering projects have gained momentum and impetus in China and the level of technology utilized in these projects has seen an improvement compared with previous efforts. This study shows that although the land-sea integration engineering has played a significant role in the development of China's coastal regions' economies, but such works are challenged by unbalanced development, poor coordination in planning and execution, weak governance of the environment and safety operations issues. This paper suggests that China should gradually strengthen the development of land-sea integration engineering systems, which covers a broad area from the coasts to the deep seas, using pilot programs that are upgraded progressively to full-scale programs due to their success. Futhermore, China should focus on the land-sea integration engineering in the fields of coastal marine engineering, land-sea communication, marine transportation engineering, island development and protection engineering and coastal disaster prevention and mitigation engineering.
Keywords： land-sea integration engineering coastal regions marine engineering land-sea coordination
Chen Rongjiang
Strategic Study of CAE 2020, Volume 22, Issue 1, Pages 146-152 doi: 10.15302/J-SSCAE-2020.01.019
Very small modular reactors (vSMRs) have become the focus of attention due to its great potential in land battlefield energy supply. It has the characteristics of flexible mobility, rapid energy supply, obvious cost advantages, and high safety. The problems of large fuel consumption, resupply difficulties, high costs and risks in the Iraqi and Afghan battlefields have led the US military to re-examine the use of vSMR in operational energy supply. This article starts with the historical process of the US Army’s development of vSMRs, and introduces representative types of vSMRs at present; then the author systematically analyzes the application scenarios, use mode, main advantages, and challenges of mobile nuclear power plants (MNPP) based on the vSMR technology. The research suggests that China should actively demonstrate the military applications of vSMR, and explore its use modes in different areas such as fixed installations, mobile battlefields, and overseas operations based on national conditions and military conditions. Taking the military demand as the traction, China should strengthen the military−civilian coordination in tackling key problems and accelerate the application of vSMR technology.
Keywords： reactor very small modular land battlefeld energy supply apply history US Army
Development of Land–Sea–Air–Space Integrated Information Network
Xu Xiaofan, Wang Niwei, Gao Yingyuan, Lu Zhou, Wang Chunting, Lu Jun
Strategic Study of CAE 2021, Volume 23, Issue 2, Pages 39-45 doi: 10.15302/J-SSCAE-2021.02.006
The land–sea–air–space integrated information network is capable of providing globally accessible, safe, and reliable information services for land-, sea-, space-, and air-based users; it is an important infrastructure for China to maintain independence in the field and to become a cyberpower. This study uses literature research and expert consultation as the main research methods to summarize the development requirements of the land–sea–air–space integrated information network. After a detailed study on typical domestic and foreign systems, the major weaknesses of China’s land–sea–air–space integrated information network are summarized. Moreover, an integrated information network architecture and development routes are proposed. Specifically, we suggest that China should focus on the deep integration in terms of network architecture, technical system, and application services; integrate the communication, navigation, and remote sensing systems; promote technical independence and industrial upgrade of space-based networks; and strengthen its system security protection capabilities.
Keywords： land–sea–air–space integrated information network space-based information system network architecture integrated network development route
Marcus Woo
Engineering 2019, Volume 5, Issue 3, Pages 355-356 doi: 10.1016/j.eng.2019.04.005
Make full use of the dredged soil for speeding up reclamation of Hengsha east shoal
Zhou Hai,Tang Chen,Ji Lan
Strategic Study of CAE 2013, Volume 15, Issue 6, Pages 30-34
According to Hengsha east shoal reclamation projects implementation, combined with the Yangtze estuary harbors and channels dredged soil disposal condition, this paper analyses the main problems of using the Yangtze estuary dredged soil to Hengsha east shoal reclamation. According to Hengsha ocean metro construction planning, it calculates reclamation scale and soil demand, and proposes the implementation principles and scheme of using the Yangtze estuary dredged soil for speeding up Hengsha east shoal reclamation, and gives some helpful suggestions.
Keywords： Yangtze estuary dredged soil resources Hengsha east shoal speeding up reclamation
Research on the relationship between Hengsha land formation and development and relevant planning
Ruan Wei,Lou Fei
Strategic Study of CAE 2013, Volume 15, Issue 6, Pages 79-85
In this paper, on the basis of natural river regime evolution and relevant planning, the relationship ,between the Hengsha land formation and development and natural river regime evolution in the Yangtze river estuary,a number of plannings including integrated remediation project,waterway development,marine functional,environmental protection,land reclamation,port construction, has been researched.
Keywords： Yangtze river estuary Hengsha land formation and development relevant planning
Optimization Strategy of MPEG-4 AAC Decoder on a Low-cost SoC
Gao Gugang,Shi Longxing,Pu Hanlai,Zhou Fan
Strategic Study of CAE 2007, Volume 9, Issue 10, Pages 60-64
This paper proposes software optimization strategies using a low-cost SoC which include float-point to fix-point conversion scheme based on statistical analysis and performance oriented customizing scheme for on-chip memory's capacity, and presents optimization methodology based on these strategies for computation intensive applications. the MPEG-4 AAC decoding in real-time is implemented as a case study to illustrate the efficiency of the proposed optimization strategy in both performance and cost. The strategy and methodology also can be used to optimize other DSP applications.
Keywords： software optimization SoC FFC on-chip memory AAC
Song Yan,Zhao Mengjun,Li Benliang,Fang Shihu
Strategic Study of CAE 2010, Volume 12, Issue 5, Pages 39-45
For the present situation of petroleum geology, technical development, and the relative bottleneck problems of oil and gas exploration in foreland basins, it is proposed that the strategy of oil and gas exploration and development in foreland basins should be implemented according to different exploration levels in the foreland basins, central and western China.
Keywords： China foreland basins oil and gas resources exploration strategy
Jue WANG, Jun WANG
Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 4, Pages 557-568 doi: 10.1631/FITEE.1601423
Keywords： Multistatic passive radar Compressed sensing Phase adjustment Fixed-point iteration technique
Song Gang,Yu Min,Mo Wei,Song Houyan
Strategic Study of CAE 2000, Volume 2, Issue 11, Pages 68-72
Staphylokinase has strong tendency to polymerize, which may hamper its clinical use. On the basis of crystal structure of staphylokinase, the dimer structure was modeled by software GRAMM V1.03 with high-resolution generic docking parameters. Two kinds of binding interfaces were generated, mainly linked by hydrophobic interaction and hydrogen bonds. The computer model of staphylokinase dimer provides a template for the design of improved staphylokinase without tendency to form polymer. A novel variant of staphylokinase (RGD-Sak) was designed based on the model. RGD-Sak gene was constructed by substitution mutagenesis of Lys-109 and Phe-111 with Arg-109 and Asp 111 respectively, confirmed by nucleotide sequencing. The mutant cDNA was ligated with prokaryotic expression vector pLY-4 and transformed into E. Coli JF1125. After temperature induction, over 50% expression level of RGD-Sak was achieved. RGD-Sak was isolated and purified by washing and solubilization of inclusion body, renaturation and ion exchange chromatography. The final product displayed a single band with a corresponding molecular weight of 15.5 kD in non-reducing SDS-PAGE with 95% of purity and 5×104 HU/mg of specific activity. The KM、Kcat value for the activation of plasminogen with RGD-Sak was 12.40 μmol L-1 、0.81 s-1, respectively. RGD-Sak show lower tendency to polymerize after incubated with 0.9% NaCl. This study provided the basis for further reconstruction of Sak by protein engineering.
Keywords： staphylokinase dimer molecular docking molecular design site-directed mutagenesis
A novel multiple-outlier-robust Kalman filter Research Articles
Yulong HUANG, Mingming BAI, Yonggang ZHANG,heuedu@163.com,mingming.bai@hrbeu.edu.cn,zhangyg@hrbeu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3, Pages 422-437 doi: 10.1631/FITEE.2000642
Keywords： Kalman filtering Multiple statistical similarity measure Multiple outliers Fixed-point iteration State estimate
Nutrient Sensing for the Future of Land-Farming Animal and Aquaculture Nutrition Perspective
Zongyu Gao, Chengdong Liu, Kangsen Mai, Gen He
Engineering 2023, Volume 23, Issue 4, Pages 112-117 doi: 10.1016/j.eng.2022.05.019
Feeding is vital for animal growth and the maintenance of health. However, the underlying mechanisms that mediate dietary performance have long been a so-called black box. It is only during recent years that studies have demonstrated that nutrients act as signals that can be sensed by cells and organisms and that play vital roles in gene expression and metabolism. Multiple signaling pathways have been identified as being responsible for the sensing of discrete nutrients. While successes have been achieved in the exploitation of nutrient-sensing signals in drug discovery and disease control, applications based on the sensing and metabolic control of major nutrients (proteins, lipids, carbohydrates, etc.) in aquaculture and land-farmed animals remain in their infancy. We thus provide a tentative perspective on future research topics and applications of nutrient sensing in animal nutrition.
Keywords： Nutrient sensing Metabolism Land-farming Animals Aquaculture Animal nutrition Precision nutrition
Title Author Date Type Operation
Survey of autonomous guidance methods for powered planetary landing
Zheng-yu Song, Cong Wang, Stephan Theil, David Seelbinder, Marco Sagliano, Xin-fu Liu, Zhi-jiang Shao,zycalt12@sina.com
Journal Article
SpaceX Starship Lands on Earth, But Manned Missions to Mars Will Require More
Chris Palmer
Journal Article
Watt Linkage–Based Legged Deployable Landing Mechanism for Reusable Launch Vehicle: Principle, Prototype Design, and Experimental Validation
Haitao Yu,Baolin Tian,Zhen Yan,Haibo Gao,Hongjian Zhang,Huiqiang Wu,Yingchao Wang,Yuhong Shi,Zongquan Deng
Journal Article
Land-Sea Integration Engineering and Technology Development Strategy
Task Force for the Study on Development Strategy of China’s Marine Engineering and Technology Land-Sea Integration Research Group
Journal Article
Application History and Enlightenment of Very Small Modular Reactor for Land Battlefield Energy Supply
Chen Rongjiang
Journal Article
Development of Land–Sea–Air–Space Integrated Information Network
Xu Xiaofan, Wang Niwei, Gao Yingyuan, Lu Zhou, Wang Chunting, Lu Jun
Journal Article
Make full use of the dredged soil for speeding up reclamation of Hengsha east shoal
Zhou Hai,Tang Chen,Ji Lan
Journal Article
Research on the relationship between Hengsha land formation and development and relevant planning
Ruan Wei,Lou Fei
Journal Article
Optimization Strategy of MPEG-4 AAC Decoder on a Low-cost SoC
Gao Gugang,Shi Longxing,Pu Hanlai,Zhou Fan
Journal Article
Oil and gas geological characteristics and exploration strategy in foreland basins, central and western China
Song Yan,Zhao Mengjun,Li Benliang,Fang Shihu
Journal Article
Joint compressed sensing imaging and phase adjustment via an iterative method for multistatic passive radar
Jue WANG, Jun WANG
Journal Article
Rational Design, Over-expression and Characterization of a Novel Staphylokinase with Lower Tendency of Polymerization
Song Gang,Yu Min,Mo Wei,Song Houyan
Journal Article
A novel multiple-outlier-robust Kalman filter
Yulong HUANG, Mingming BAI, Yonggang ZHANG,heuedu@163.com,mingming.bai@hrbeu.edu.cn,zhangyg@hrbeu.edu.cn
Journal Article
京公网安备 11010502051620号
