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Crowd modeling based on purposiveness and a destination-driven analysis method Research Articles
Ning Ding, Weimin Qi, Huihuan Qian,hhqian@cuhk.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 10, Pages 1351-1369 doi: 10.1631/FITEE.2000312
Keywords： 人群建模；智能视频监控；人群稳定性
Progress and Prospect of Seafloor Instability Research
Gao Weijian, Li Wei
Strategic Study of CAE 2023, Volume 25, Issue 3, Pages 109-121 doi: 10.15302/J-SSCAE-2023.03.010
Seafloor instability and secondary submarine geohazards are widely present in the ocean, posing a threat to submarine infrastructures such as coastal port facilities, offshore drilling platforms, and submarine pipelines and fiber-optic cables. However, formation mechanisms and controlling factors of seafloor instability are still poorly understood. To improve the understanding, based on the history and development of seafloor instability, this study sorts out the common categories, global distribution, and geophysical characteristics, analyzes the formation mechanisms, controlling factors, and engineering geohazards risks, and summarizes popular quantitative analysis methods for seafloor instability. Subsequently, the application and limitations of experimental simulation technology for the slope instability process are discussed. Focused on the disaster mechanism, intelligent analysis of multi-source data, and three-dimensional monitoring of seabed instability, this study proposed the development direction and countermeasures of future seafloor instability research, aiming to provide guiding suggestions for the simulation, prediction, and warning of seafloor instability.
Keywords： seafloor instability submarine geohazards formation mechanisms risk assessment instability analysis
Relationship of Structure and Stability in Emulsion Explosvie
Wang Xuguang,Shen Yingfeng
Strategic Study of CAE 2000, Volume 2, Issue 2, Pages 24-29
Through the study on structure, this paper systematically analysed various factors affecting stability of emulsion explosives, and drew a conclusion that zero osmosis pressure might be a good criterion of its stability. The experimental results show that the osmosis pressures of several kinds of stable emulsion explosive are near zero.
Keywords： emulsion explosives structure stability
Research of the aerostatic and aerodynamic stability of super long-span cable-stayed bridges
Zhang Xinjun and Sun Hailing
Strategic Study of CAE 2014, Volume 16, Issue 3, Pages 50-58
With the increase of span length，the cable-stayed bridge tends to be a more slender structural system，and consequently the wind stability becomes an important problem for its design and construction. Three-dimensional nonlinear aerostatic and aerodynamic stability analysis of long-span bridges is used to investigate the aerostatic and aerodynamic stability of a super long- span cable- stayed bridge with main span of1400m，and the results are compared with those of a suspension bridge with the similar main span，and considering from the aspect of wind stability，the availability of using the cable- stayed bridge in super long- span bridges whose main span exceeds1000m is discussed. In addition，parametric analysis on the aerostatic and aerodynamic stability of super long-span cable-stayed bridges is conducted including the depthand width of the girder，structure style of the tower，the tower’s height-to-spanratio，the ratio of side span to main span，the auxiliary piers in the side span and the anchorage system of stay cables etc，and the key design parameters are pointed out，and also their reasonable values are proposed. The results show that as compared to the suspension bridge with the same main span，the cable- stayed bridge has greater structural stiffness，and becomes more stable under the static and dynamic wind action，and consequently becomes a favorable structural system for super long- span bridges whose main span exceeds1000m；the super long- span cable- stayed bridge becomes more aerostatically and aerodynamically stable under the cases that the girder depth is increased，the girder width is decreased，the inverse Y-shaped tower is used，the tower’s height is increased，the side span is shortened，the auxiliary piers are installed in side span and the stayed cables are partially earth-anchored.
Keywords： super long-span cable-stayed bridge aerostatic stability aerodynamic stability design parameter
Stability and Instability of Systems—An Extended Discussion on Stir Kinetic Energy Conservation Law
Chen Gangyi,Ouyang Bolin,Yuan Dongsheng,Hao Liping,Zhou Lirong
Strategic Study of CAE 2005, Volume 7, Issue 8, Pages 41-46
It is an extended discussion on the stir kinetic energy conservation law, which is proposed by OuYang Shoucheng. The authors think that stir kinetic energy conservation law is an important principle and analysis method for stability and evolutionism of systems. It is not only an approach for explaining stability of system, but also the analysis method for evolutionism of system, and it points out some problems in Newton's theories as well.
Keywords： system construction stir kinetic energy stability and evolutionism
Shengbo Eben Li, Zhitao Wang, Yang Zheng, Diange Yang, Keyou You
Engineering 2020, Volume 6, Issue 6, Pages 688-694 doi: 10.1016/j.eng.2020.05.006
The time-varying network topology can significantly affect the stability of multi-agent systems. This paper examines the stability of leader–follower multi-agent systems with general linear dynamics and switching network topologies, which have applications in the platooning of connected vehicles. The switching interaction topology is modeled as a class of directed graphs in order to describe the information exchange between multi-agent systems, where the eigenvalues of every associated matrix are required to be positive real. The Hurwitz criterion and the Riccati inequality are used to design a distributed control law and estimate the convergence speed of the closed-loop system. A sufficient condition is provided for the stability of multi-agent systems under switching topologies. A common Lyapunov function is formulated to prove closed-loop stability for the directed network with switching topologies. The result is applied to a typical cyber–physical system—that is, a connected vehicle platoon—which illustrates the effectiveness of the proposed method.
Keywords： Stability Multi-agent system Switching topologies Common Lyapunov function
A method for improve the mechanical robustness of the superhydrophobic wood
Wang Chengyu and Liu Feng
Strategic Study of CAE 2014, Volume 16, Issue 4, Pages 79-82
Improvement of the robustness of superhydrophobic surface is crucial for the purpose of achieving commercial applications of these surfaces in such various areas as self-cleaning，water repellency and corrosion resistance.We have investigated a fabrication of polyvinyl alcohol（PVA）/silica（SiO2）composite polymer coating on wooden substrates with super repellency toward water，low sliding angles，low contact angle hysteresis，and relatively better mechanical robustness.
Keywords： superhydrophobic mechanical robustness PVA/SiO2 wood surface
Evaluation of slope stability based on GA-ANFIS
Lin Xianzhi,Xue Tao,Yu Peng,Chen Qing
Strategic Study of CAE 2011, Volume 13, Issue 3, Pages 77-81
Adaptive neuro-fuzzy inference system combines the interpretability of fuzzy reasoning and the ability of adaptability and self-learning of neural network, overcoming the enormous difficulties for slope stability analysis caused by the uncertainty of rock slope. At the same time, for the reasonable of parameter setting in fuzzy inference system, evaluation model of adaptive neuro-fuzzy inference based on genetic algorithm is established. It was shown that the results of GA-ANFIS model are consistent with field condition, which makes it be an effective method for slope stability evaluation.
Keywords： GA-ANFIS model evaluation index uncertainty slope stability evaluation
Li Jianming
Strategic Study of CAE 2004, Volume 6, Issue 5, Pages 79-82
Through researching on a rock slope by the improved CSF methods,the paper works out not only the security coefficient of the slope but also its critical slip surface, the influence factors and slip causes. It is proved that the author's ideas and ways, which can be studied and applied，are easy, appropriate, significant and reliable.
Keywords： CSF computing methods rock slope stability
Che Huajun,Chen Nan,Yin Guodong
Strategic Study of CAE 2009, Volume 11, Issue 9, Pages 81-86
Based on the chassis of a car, a multi-body dynamics model was built with ADAMS software. With the objective evaluation index for maneuverability of vehicle, ADAMS function was built to evaluate vehicle maneuverability. Orthogonal optimization design was applied to optimizing vehicle maneuverability with ADAMS software. The applying virtual prototyping technology for vehicle maneuverability and structure orthogonal optimization not only increases accuracy of simulation model compared with lumped-mass model, but also finds the main factors influencing the vehicle maneuverability and gets the optimization levels of the influence factors. The design process can be used in industrial organization.
Keywords： virtual prototyping vehicle maneuverability orthogonal optimization design
Anon-stationary channelmodel for 5Gmassive MIMOsystems Article
Jian-qiao CHEN, Zhi ZHANG, Tian TANG, Yu-zhen HUANG
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12, Pages 2101-2110 doi: 10.1631/FITEE.1700028
Keywords： Massive MIMO Spherical wave-front assumption Non-stationary property Birth-death process Visibility region method
Handling Stability for Four-wheel Steering Vehicle Based on μ Synthesis Robust Control
Yin Guodong,Chen Nan,Li Pu
Strategic Study of CAE 2005, Volume 7, Issue 4, Pages 54-58
The vehicles always undertake different loadings including external disturbances and the design of vehicle control system has model errors. The primary design techniques for 4WS controller are their inability to degrade the performance of closed-loop systems. The design of yaw rate tracking control system architecture by using μ synthesis robust control is presented and the weighting functions are selected. The results show that the control system has fine dynamic characteristic, robust stability and robust performance, and the 4WS vehicle with the proposed control strategy can provide greater maneuverability and driving safety.
Keywords： four-wheel steering robust control handling stability μ synthesis
Stability of Boolean networks with state-dependent random impulses
Ya-wen Shen, Yu-qian Guo, Wei-hua Gui,shenyawen@csu.edu.cn,gyuqian@csu.edu.cn,gwh@csu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 2, Pages 141-286 doi: 10.1631/FITEE.1900454
Keywords： Boolean network with impulses Forward completeness Finite-time stability with probability one Asymptotical stability in distribution
Mathematical and Predictive Models of SARS Epidemic Disease and Mechanism of Prevention and Control
Liu Yunzhong,Xuan Huiyu,Lin Guoxi
Strategic Study of CAE 2004, Volume 6, Issue 9, Pages 60-65
First, based on the law of disease propagation and conservation of population statistics, this paper sets up mathematical models of four kinds of person for SARS, applies mathematical method to analyze the model, and it gets the physiology senses of the mathematical model and mechanism of prevention and control respectively. Second, it sets up predictive models of SARS epidemic disease using BP artificial neural network. According to the data of SARS in Beijing, it predicts and analyzes the model. The experimental results show that the method is simpler, and more effective with high prediction precision。
Keywords： SARS stability trail threshold theory artificial neural network
Study on the Crustal Stability in Three-Gorges Area of the Yangtze River
Li Ping,Li Yuanjun
Strategic Study of CAE 2004, Volume 6, Issue 6, Pages 26-34
The Three-Gorges Dam on the Yangtze River is situated on the intact rock mass composed of diorite-granite at the southern termination of the Huangling block. The Huangling block as a sub-plate having double-layer structure (crystalline basement and sedimentary cover) in China continent keeps constant and slow uplifting as a whole since its formation in the Indosinian movement. Tectonic deformation within the block is not significant, with exception of a slight southeastward tilting. The block is confined by many active structures, of which the sub-longitudinal Yuan*an and Xiannushan deep fault zones are the main strongly seismogenic zones. The Yuan´an fault zone represents a regional boundary between West Henan, West Hubei and West Hunan mountainous regions as well as the Nanyang, Jianghan and Dongting Lake basins, with a total length of more than 1000 km. Two times M 6.5 earthquakes (the Changde and the Nanyang earthquakes) had occurred in the fault zone in historic time and the distance between the two epicenters is about 500 km. The Xiannushan fault one extends along the Xiangxi River northward and ends at the Qingfeng fault. It runs southward across Yuyangguan Pass and then its trace is unknown. Total length of the fault zone is more than 220 km. The fault zone has tectonic condition for occurrence of M 6 earthquake. The possible seismic risk for the dam may come from these two strong seismogenic zones, thus the seismic intensity influencing the dam was estimated to be 6°〜7° and the horizontal peak acceleration to be 0.1〜0.15 g.
Keywords： Three-Gorges Dam on the Yangtze River Huangling block strong seismogenic zone crustal stability
Title Author Date Type Operation
Crowd modeling based on purposiveness and a destination-driven analysis method
Ning Ding, Weimin Qi, Huihuan Qian,hhqian@cuhk.edu.cn
Journal Article
Relationship of Structure and Stability in Emulsion Explosvie
Wang Xuguang,Shen Yingfeng
Journal Article
Research of the aerostatic and aerodynamic stability of super long-span cable-stayed bridges
Zhang Xinjun and Sun Hailing
Journal Article
Stability and Instability of Systems—An Extended Discussion on Stir Kinetic Energy Conservation Law
Chen Gangyi,Ouyang Bolin,Yuan Dongsheng,Hao Liping,Zhou Lirong
Journal Article
Stability of General Linear Dynamic Multi-Agent Systems under Switching Topologies with Positive Real Eigenvalues
Shengbo Eben Li, Zhitao Wang, Yang Zheng, Diange Yang, Keyou You
Journal Article
A method for improve the mechanical robustness of the superhydrophobic wood
Wang Chengyu and Liu Feng
Journal Article
Evaluation of slope stability based on GA-ANFIS
Lin Xianzhi,Xue Tao,Yu Peng,Chen Qing
Journal Article
Research on the Stability of a Slope in One Hydropower Station by the Improved Critical Slip Field (CSF) Methods
Li Jianming
Journal Article
Application of orthogonal optimization design for vehicle maneuverability and structure optimum based on virtual prototyping technology
Che Huajun,Chen Nan,Yin Guodong
Journal Article
Anon-stationary channelmodel for 5Gmassive MIMOsystems
Jian-qiao CHEN, Zhi ZHANG, Tian TANG, Yu-zhen HUANG
Journal Article
Handling Stability for Four-wheel Steering Vehicle Based on μ Synthesis Robust Control
Yin Guodong,Chen Nan,Li Pu
Journal Article
Stability of Boolean networks with state-dependent random impulses
Ya-wen Shen, Yu-qian Guo, Wei-hua Gui,shenyawen@csu.edu.cn,gyuqian@csu.edu.cn,gwh@csu.edu.cn
Journal Article
Mathematical and Predictive Models of SARS Epidemic Disease and Mechanism of Prevention and Control
Liu Yunzhong,Xuan Huiyu,Lin Guoxi
Journal Article
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