| Title |
Author |
Abstract |
| Evolutionary
Modeling Algorithm for Systems of Ordinary Differential Equations
Based on Mind Evolutionary Computation |
ZHA
Kai,
JIE Jing, ZENG Jian-chao |
Based on the fundamental Mind Evolutionary Computation (MEC), an
effective method of similartaxis and dissimilation for MEC is
present to solve modeling problem of systems of the ordinary
differential equations. In the paper, a tree construct called
information tree is built to record the information produced
during the process of similartaxis and dissimilation and guide
the new generation’s producing according to the tree coding
method in Genetic Programming GP). Finally, it is proved by the
results of some experiments that the method of MEC presented in
this paper, compared with the GP, holds the advantages of higher
computing speed and better capability for global searching. |
| Segmenting
Chinese
Based on Probabilistic
Model |
LI
Jia-fu,
ZHANG Ya-fei |
Word Segmentation is a basic task of Chinese Information
Processing. In this paper we present a simple probabilistic
model of Chinese text based on the occurrence probability of the
words, which can be seen as a zero-th order hidden Markov Model
(HMM). Then we investigate how to discover by EM algorithm the
words and their probabilities from a corpus of unsegmented text
without using a dictionary. The last part presents a simulation
system
of processing Chinese text. |
| A
Fast Fuzzy
Identification Method in Nonlinear
System
Based on Fuzzy Logic Rules |
LIU
Fu-cai, GUAN Xin-ping, PEI Run |
In accordance with the problems that the algorithm is too
complex in the past fuzzy modeling methods, this article
proposes a new method of fuzzy modeling for complex system. The
method is simple and powerful. This method is based on fuzzy
partition of input space, and it calculates the grade of
membership of given patterns in each fuzzy subspace with the
consequence parameters identification obtained by using Kalman
filtering algorithm. The whole identification process takes much
less CPU time than the fuzzy clustering method and the
error-feedback learning algorithm. Finally the effectiveness and
practicability of this method is demonstrated by the simulation
results of the famous Box-Jenkins gas furnace data. |
| Analysis
of Orbital Perturbation
of Satellite via Wavelet Smoothing |
WANG
Shi, LIAO Shou-yi, LUO Jian-shu,
DAI
Jin-hai |
Orbital perturbation of satellite is a very complicate problem.
It’s hard to analyze all factors. In this paper a new method
— wavelet smoothness based on the perturbation computing
results is presented. The method has a high performance in
approximation and prediction. Moreover, it can remove noises of
computing results and real world, and it has a good smoothing of
the signal. |
| Research on Two-Dimensional Wind-driven
Currents Modeling on
Shallow Water in Dianchi Lake and Related Result Display |
ZHANG
Ping-feng,
JING Shao-guang,
HUANG
Feng-gang |
Two-dimensional wind-driven currents model is a very useful
hydrodynamic model for shallow water, such as Dianchi Lake. The
decision of modeling parameters and boundary conditions, the
selection of numerical calculation method are presented in this
paper. The method of displaying flow field dynamically using VC
is discussed here. A map representing the computing result under
10 m/s south-west wind speed is also showed at the end of the
paper. |
| Application
of Neural Networks Based on System Architecture in Nonlinear
Modeling |
QIAO
Jun-wei, ZHAN Yong-qi, SHI Guang-lin |
A novel method of nonlinear system modeling is presented, which
employs neural networks based on system architecture. This
method translates a complicated system into some simple
sub-systems. Each sub-system is modeled with a functional link
neuron. Then the neurons are connected into an integrated
network according to the relationship between these sub-systems.
The performance of the networks is analyzed, and its application
in complicated system modeling is discussed, too. The
feasibility and validity of the method is illustrated by a
simulation on Y2-Hc10 pilot operated relief valve. |
| Modeling
and Simulation of Scattering Field for Bistatic Sonar |
ZHANG
Xiao-feng,
ZHAO Jun-wei,
WANG
Rong-qing,
HAN Jing |
In this paper，the
deformed cylinders method is applied to setup
the scattering field model of
prolate target when the echo comes from non-incident
direction. Through the modeling and simulating, the pattern of
scattering echo and the relation between target strength and
azimuthal angle are obtained when the source and receiver are
separated. Numerical comparison with the experiment result
reveals that the theory model is correct. |
| Parameters
Estimation Based on Genetic
Algorithms for Systems
with Uncertain Disturbance |
LI
Shi-ling, ZHANG Fu-tang,
LI Zhi |
This paper proposed a new method for parameter estimation based
on genetic algorithms (GA) for linear systems in the case of its
coefficient matrix with uncertain disturbance. Comparing with
the method based on linear matrix inequalities (LMI), it is more
fit for estimating the parameter of high dimensional systems for
its rapidity. It becomes a feasible approach to improve the
modeling precision of high dimensional systems when instruments
show measuring deviation. Numerical simulations show that the
method proposed in this paper has high robustness, good
precision and can restrain the uncertain disturber’s influence
to the system precision. |
| SWARM
— An Object-Oriented Platform to Construct Artificial Life
Model |
DING
Hao, YANG Xiao-ping |
This paper introduces the theory of Complex Adaptive System (CAS).
It also recommends a software utility – Swarm that allows
researchers to construct discrete event simulations of complex
systems with heterogeneous agents. In the end, we carry out an
example – Life Game, to help the readers to grasp the modeling
method of constructing CAS. |
| Design
and
Simulation of Computer External Clock Synchronization
System
Based on Statistical Synchronization
Algorithms |
LI
Ming-guo,
SONG Hai-na |
The problem of designing computer external clock synchronization
system with PCS algorithm is studied. Firstly, the network delay
is measured and modeled, and then a software simulation
evaluation method is put forward to evaluate the performance of
PCS algorithm. With this method, the synchronization precision
and probabilistic performance of PCS algorithm is evaluated. The
result shows that the design method given can satisfy practical
requirements. |
| Distributed
Collaboration Modeling Research Based on Distributed Simulation
Model Object |
CHEN
Xiao-bo, XIONG Guang-leng,
CHAI
Xu-dong |
As the modeling of mechatronic product simulation is completed
often in manner of centralization, a new distributed
collaboration modeling method was given. First analysed the
information which are necessary for distributed collaboration
modeling, then made use of the distributed object technology to
integrate them into distributed simulation model object. The
distributed simulation model object not only can be correctly
assembled and re-used with its plenty of information, but also
can be accessed transparently with its distribution. The
distributed collaboration modeling method based on distributed
simulation model object can strongly support distributed
collaboration modeling of mechatronic product simulation. |
| Real-time
Simulation Platform Based on Computer Supported Cooperative Work |
LI
Qi, HUANG Ke-di, LIANG Jia-hong,
CHEN
Guo-qiang |
This paper introduces a new real-time simulation platform: GPRTS,
which is based-on the Computer Supported Cooperative Work (CSCW).
The software and hardware architecture, realization principles
and key technologies are introduced. Agent-based technologies
are widely viewed as one of the most important computing shifts
in recent years. These Agent-based systems have largely used in
Internet service, information retrieval, network and resource
management. However, the potential of the Agent-based systems
for modeling and simulation has been overlooked. We introduce
Agent to GPRTS to realize data management and transfer in
distributed simulation environment. |
| Research
and Implementation of COSIM Run-time Management Platform |
WANG
Jiang-yun, WANG Xing-ren,
CHAI
Xu-dong |
The design and implementation of the Collaborative Simulation
Run-time Management Platform is mainly studied in this paper.
Collaborative Simulation Platform (COSIM) supports modeling and
simulation distributed in various locations, supports the
interoperability of simulation tools. The Run-time Management
Platform is a part of COSIM. It provides simulation run-time
management, time management and data management. Finally a
demonstration application is given. |
| Simulation
Platform of Distributed Real Time Systems Based on CANbus |
WEI
Zhen, SHEN Gang, XIE Jian-ying |
The theoretical analysis in the distributed real time systems
uses the results from the real time scheduling theory. To
satisfy the timing requirements, the distributed real time
systems, need to not only assign proper priorities to the tasks
running in a single processor, but also concern with the time
consumptions in the data communication links. For improving
research to meet with the realistic world, we design a
simulation system based on CANbus, which is composed of six
CANbus nodes and the relevant software for recording and
processing data, and a simulation instance is presented, in
which the differences between the realistic situation and the
usual assumptions about timing issue are shown. |
| Research
and Realization of DCOM-based Distributed Interoperation among
Simulation Tools Supporting Virtual
Prototyping |
CHEN
Bin-yuan, XIONG Guang-leng,
GOU
Ling-yi |
The
interaction
of
different fields’ simulation tools in distributed environment
is the key technology to realize the supporting platform of
virtual prototyping (VP).
Using DCOM-based ActiveX/Automation technology is an effective
method to solve the interaction of distributed applications. In
the paper, a DCOM-based integration solution between the
simulation tools of the control field and of the mechanical
field is proposed. The distributed interaction of Matlab and
VisualNastran is realized according to the application
background of car’s virtual product development. |
| Collaborative
Simulation for the Electronic System on the Missile |
LU
Yuan |
To meet the requirements of simulation for the electronic
system
on the missile, a framework of the collaborative simulation
is presented including hardware and software environment. The
related key techniques are discussed including hybrid
hierarchical modeling, qualitative and quantitative modeling,
real-time distributed simulation and real-time database etc.
Finally, an example of the system modeling is given. |
| Research on Late-model Redundant Flight Control
System of
Task-managing Style |
TANG
Zhi-yong, WANG Zhan-lin |
After research on previous flight control system, this paper
presents a late-model system based on Task-managing style. This
means to divide and assign the task to corresponding computer
node and cooperate with the task according to the principle of
decreasing the communication, improving the concurrency,
increasing the reliability and load balancing. It means to
schedule dynamically when failure occurs to ensure implementing
the task sequentially. This paper puts forward corresponding
software and hardware structure of simulation platform, and
provides some relevant technical solution and strategy in LAN
real time distributed simulation system. |
| Parallel
and Distributed Simulation Based on Networks |
GUO
Tong-cheng, MU Chun-di |
With the emergence of high-performance networks and low-cost
clusters, it is more possible to employ parallel and distributed
simulation widely. First, the characters of various parallel
computers are summarized; the concepts of parallel simulations
and distributed simulations are identified. Then the strategies
of parallel simulations for continuous systems and discrete
event systems are generalized. The merits and defects of them
are analyzed, the optimizations of them concerning clusters are
proposed as well. At last, the various integrated
infrastructures of distributed applications are compared in
detail, a conclusion is drawn that CORBA is suitable for
simulations in small or medium dimension systems. |
| A
DENEB-QUEST Based Quality Simulation System |
FAN
Shu-hai, XIAO Tian-yuan, QIAO Gui-xiu, CHANG Xiao-meng, DONG
Jian-hua |
This paper briefly analyses the principle and framework of
modeling the DENEB-QUEST based manufacturing systems. The
approach of technical implementation is presented. Furthermore,
the concepts and methods for the project of the DENEB-QUEST
based quality simulation system are introduced; the presentation
of system structure is also given. Finally, gives out an actual
DENEB-QUEST based quality simulation system. |
| Main
Traits and Confidence Assessment Measures of Military
Large-scale and Complicated Simulation System |
SHANG
Chang-an, LIU Xing-tang, WU Hao |
The writer, on the basis of the integrated analysis on military
simulation technology and system development’s direction in
information era, emphatically discusses the main traits and new
problems in confidence assessment of military large-scale and
complicated simulation system, and proposes relevant confidence
assessment research measures, as the important reference of a
research on the theory and methods of confidence assessment for
large-scale and complicated simulation system. |
| PC
Based Unmanned Aerial Vehicle Simulation System |
CHEN
Bing, ZHU Ji-hong, SUN Zeng-qi |
The paper introduces a simulation system of Unmanned
Aerial Vehicle (UAV).
Based on PC/Windows、VC++6.0
and OpenGL，the
simulation system can simulate the dynamics and flight control
laws of UAV，according
to its mathematical model of dynamics and kinematics。And
it is useful to flight quality evaluation and accelerating the
development of UAVs. |
| Graphic
Technology of Distributed Marine Simulation System—V. Dragon
2000 |
YIN
Yong, REN Hong-xiang, JIN Yi-cheng,
SUN
Teng-da |
The paper introduces the architecture and graphic technology
such as: visual technology, radar image generation and
electronic chart displaying method used in distributed marine
simulation system: V. Dragon 2000. The simulation model of sea
based on energy spectrum of wave is described in details. The
model can simulate various sea states in real-time and generate
realistic scene. Particle system and image synthesis method are
also adopted to implement the dynamic simulation of ship’s
wakes in real-time. Triangulated algorithm is used to generate
the optimized triangular mesh based on the contour line in a sea
chart; the algorithm can generate the 3-D surface model of a
real harbor. |
| research
on simulation
system for strip laminar
cooling |
WANG
Xiao-bo,
REN De-xiang, SHAO Hui-he |
This article introduces a strip laminar cooling process
simulation software package for an existing hot strip mill. This
software not only builds a dynamic simulation model for the
cooling process but also display temperature drop of strip
section. And the simulation of strip dynamic moving process on
the roll after rolling is realized in the software. What’s
more input variables, output variables, control valves and
control parameters are all displayed on the computer interface.
Visualization and convenient use are the main characteristics of
the software. It provides an experiment tool for hot mill staff
to research and develop new products. |
| Realization
of Shipboard Electronic Warfare Comprehensive Simulation System |
WANG
Hong-jun, ZHAO Hong |
The comprehensive simulation system of shipboard Electronic
Warfare is a highly integrated, expansible, comprehensive system
which is connected with network for teaching and training. This
system is an important part of a ship multipurpose simulation
training system. This paper introduces the configuration,
function, model and architecture of this simulation system and
provides the referenced experience for the farther research
work. |
| Research
on Agent-Base and Software Composite Decision Support Systems |
JU
Chun-hua, LING Yun,
T.J.
Norman |
Agent-based system is an increasingly prevalent issue in
Artificial Intelligence, and its application to Distributed
Decision Support Systems (DDSS), operating over the Internet, is
a potentially valuable contribution. This paper proposes an
approach to DDSS using multiple agents to coordinate decision
support Agent oriented distributed decision support systems (AODDSS).
The architecture of individual agents involved in system is
discussed, and a particular agent organization is analyzed with
a view to applying this technology to DDSS. |
| An
Adaptive Learning Approach to Maneuvering Target Tracking Based
on Fusion of Multi-Sensor |
SHI
Xiao-rong, WANG Qing,
ZHANG
Ming-lian, BI Jing |
Considering there exists offset between the measured data and
the real data of targets, as well missing detection during the
scan of radar, an adaptive learning approach of handling missing
detection is presented. It is applied to the data fusion and
target tracking of a radar/infrared image system. The entire
data fusion and target tracking system is presented, which is
based on a radar/infrared image dual-mode guidance system. The
digital simulation results show that this approach is effective
and has strong robustness. In addition, this approach can be
extended to an arbitrary number of dissimilar synchronous
sensors. |
| A
Kind of Simple Fuzzy Robust Quadratic Stable Controller Design |
YUE
Dong, WU Zhong-qiang, XU Shi-fan |
The stable problem of nonlinear system was studied. Fuzzy
dynamical models were used, and the global fuzzy models were
translated into the system with uncertainties. The fuzzy
controllers were designed to acquire global asymptotically
stable fuzzy system models, using a kind of simple robust
quadratic stability controller design methods, and under
matching condition. The difficult of solving common matrix P
by using parallel distributed compensation was avoided. The
effect of the scheme has been tested by simulation of an
inverted pendulum. |
| Simulation
Study of Ship Control Based on Hybrid Intelligent Technology |
YANG
Guo-xun, GUO Chen, JIA Xin-le |
Hybrid intelligent technique is used for ship course control in
this paper. The parameters of controller are off-line learned
and its structure, parameters and rules weights are on-line
adjusted. It can solve the uncertainty of ship control in a way.
Simulation results demonstrate that the algorithm is feasible. |
| Diagonal
Recurrent Neural Network
Algorithm for Extreme Short Prediction of Ship Motion |
ZHANG
Xiao-shuang,
PENG
Xiu-yan,
ZHAO
Xi-ren |
The modeling method of the ship extreme short-term motion
prediction by applying neural network theory is discussed. The
diagonal
recurrent
neural network model and algorithm of ship motion prediction is
given. With the algorithm, real ship motion prediction is
simulated, and the simulation method and procedure are
introduced in detail. The simulation results were compared with
the real ship data and those from auto-regress method and
periodic chart method, which proved the algorithm to be feasible。 |
| Simulation
Research on Control Strategies and Modeling of the
Double-evaporator Air-conditioner with Inverter |
CHEN
Wu, ZHOU Xing-xi, XIA Jin,
JIN
Xin-qiao, Wang Yi |
According to the performance characteristics of
double-evaporator air conditioner with inverter, the control
strategies of the compressor-speed and the opening of electronic
expansive valve has been established. Meanwhile, in order to
improve the quality of the control strategies, load factor and
fuzzy reasoning method are adopted. With the aid of system’s
dynamic mathematics model, a simulation research on the result
of the control strategies has been carried out. Simulation
results show that the control strategies adopted to this
two-evaporator variable-refrigerant-volume system is satisfying. |
| On
Development Trend of Military Drilling Simulators/Systems |
LIU
Xing-tang, WAN Shao-song,
ZHANG
Shuang-xuan |
With system simulation as the main technological support,
military drilling simulators/systems play fundamental projects
of military simulating drill. There would be no military
simulating drills without them. This paper describes the
situation of military drilling simulators/systems at home and
abroad, points out the significant opportunity and severe
challenges they are confronted with and discusses the
development trend of military drilling simulators/systems. It is
of the utmost importance, for stimulating ‘the simulating’
of military drilling methods and the modernization of military
drilling simulations of the PLA, to grasp firmly the
opportunity, meet the challenge, and promote development. This
paper has some particular consulting significance to it. |
| A
Simulation Experiment of Underwater Acoustic Signal
Classification Using Global Dynamical Models |
XUE
Wen-hu,
ZHANG Ming-min |
Detection and classification of weak underwater signals are
difficult problems in processing acoustic signals. This paper
considers a method for using global models of chaotic dynamical
systems theory to perform detection and classification of
underwater signals, and it proved to be efficient by the
simulated data. Then through fitting this model on radiation
noises of several naval vessels, we successfully classified the
different classes of signals. The simulation results show that
classification in high noise regimes (0 dB SNR cases) can be
performed, and classification probabilities can be directly
computed from ensemble statistics in the model coefficient
space. |
| Numerical
Emulation of Iodine Concentration Field of Groundwater System |
GONG
Hui-li, ZHAO Wen-ji, ZHU Yun-qiang |
Based on conception model of groundwater system in the Zhengzhou
city, the groundwater quality models are established. The models
include the model of groundwater flow, the model of solute
movement and the model of ground water motion. Firstly, the
model of groundwater flow is solved for H (x,y,t);
then the model of groundwater movement is solved for actual
velocity of groundwater flow in every unit; and the solute
movement is solved for the iodine concentration of the every
point in overall research area. The results of numerical
emulation are good. |
| Modeling
and Simulating: Large-scale Project’s Material Supply Chain |
LIU
San-ya, WANG Hong-wei, GUO Min |
The theory of supply chain management and the technology of
Agent were introduced in the large-scale project’s material
supply system. The theory, method and application (in the study
of supply chain) of Based Agent Modeling (BAM) were discussed,
and finally an example is given in this paper. |
| Dynamic
Simulation of the Vehicle Electric System |
SONG
Chun-yao |
The vehicle electric system, which is a nonlinear and
unsymmetrical system, is composed of the silicon rectifying
generator and battery in parallel and its dynamic property is
different from usual electric power system very much. The thesis
tries to put forward a dynamic simulation method of vehicle
electric system. The working characteristic of the silicon
rectifying generator is analyzed; its working mode and
transformation law are expressed by adopting state variables and
coordinate transformation; battery is looked as a circuit
element and the simplified equivalent circuit is brought
forward, which get the mathematical model of the vehicle
electric system as a consequence. Finally, the dynamic
simulation of the vehicle electric system is made for example
and the experiment is carried out to prove the simulation method
is feasible. |
| Simulation
of Urban Road Network Reliability |
HOU
li-wen, JIANG Fu |
The paper firstly describes the several aspects about road
network, including its conception, affecting factors and focus
of research. And then a road network reliability model based on
the travel time is established. By computing the model with
simulation, some good suggestion for informalization of urban
transportation management can be put forward to the bureaus.
Finally the direction for further research is indicated. |
| Motional
Simulation of Chinese Traditional Medicine Automatically
Dispensing System Based on OpenGL |
SHU
Xin-bin, CAO Zhi-kui, TONG Jian-gang, SHEN Bin |
A visual motional simulation model of Chinese Traditional
Medicine Automatically Dispensing System (CTMADS) is established
by using OpenGL technique. Along with the theoretical analysis
of algorithm, different algorithms for controlling
collecting-hopper’s motion are tested on the established
platform. Finally an optimum algorithm is selected. By analyzing
data from this simulation platform, its improvement on
developing CTMADS is argued. |
| Simulation
Study on Blind Separation Techniques for Ship Radiated Noises |
ZHANG
Xin-hua |
Based on the idea of blind source separation, this paper shows
that the original source signals of interest could be
reconstructed from the hybrid complex underwater signals by a
blind source separation technique. Two simulation experiments
have been carried out in the paper: (1) For one ship, the
components corresponding to different harmonic vibration sources
in a ship could be decomposed from its radiated signals. (2) For
multi-ship existence, each of the ship-radiated noises in the
mixture signals could be separated by the blind source
separation technique. Based on two kinds of simulated data
produced by theoretic models and real recorded data, the
simulation experiments achieved satisfactory results. It was
shown that the adaptive on-line neural learning algorithm used
in the paper is stable, fast and robust to noise. |
| Modularization
and Simulation of Facial Heater |
CAI
Ri-ji, ZHANG Qin-shun, ZOU Wen-jin, CHEN Ke, SHEN Xiu-zhong, DAI
Zhen-gxi |
This paper constructs a dynamic model of thermal system of
heater based on its structure. The simulation results of this
system show that the model has certain precision in dynamic and
static performances and the modularization is creative at some
aspect, which is valued for its general application in thermal
system field. |
| Realization
of Adaptive Antenna Array Simulation System Using MATLAB |
LUO
Xiao-wu,
LIU Qin-rang |
In this paper the idea, method and realization of adaptive
antenna array simulation system based on MATLAB are introduced.
Signal generation, channel transmission, configuration of
antenna array, parameter choice of algorithm and performance of
output can all be simulated, it provides a convenient tool for
the study of adaptive antenna array in laboratory. |
