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According to the time-varying and nonlinear characteristics of fluid, this paper puts forward a design scheme of real-time and accurate control of the liquid flow. The control system which taking the programmable logic controller (PLC) as the platform and using the PID control algorithm is composed with the touch screen, electromagnetic flow meter, temperature sensor, electric regulating valve system and so on. And the PID algorithm based on PLC design has carried on the analysis, simulation and optimization. The results show that PID algorithm is designed using this method with a strong and more precise control of the scheme. It is not only suitable for the flow control, changes in action after the equipment is also applicable to analog volume control temperature, liquid level, velocity, height etc.

In order to overcome the disadvantages of rapid acid-rock reaction rate, short penetration distance, and poor acidification results exist in the process of traditional acidification in Putaohua reservoir, this paper has developed research on retarded acidification technique and optimized its formula and injection parameters. With the operations of complex formulation, screening and optimization among main agent, scale-fromingion inhibitor clay stabilizer corrosion inhibitor retardant, a kind of retarded unplugging formula with good combination property suits for environment of high temperature has been developed. According to research, this developed formula system has permeability improving rate of 60% on natural core, suggest good characteristics of corrosion inhibition, retardation and permeability increasing.

To simulate skull-CSF-brain interaction relations, a simple finite element head model is established, based on ALE (Arbitrary Lagrangian-Eulerian) and overlapping mesh methods. The responses of head under impact was simulated with this model. The numerical results are coincidence well with the experimental results conducted by Nahum et al. What’s more, it is found that the skull-brain relative displacement and brain injury may be predicted better with the ALE method.

The focus of the study was to establish an UPLC-ESI-MS/MS method for the qualitative and quantitative determination of VLPVPR in rat plasma. The method was as follows: Protein impurities in the rat plasma samples were precipitated with methanol; A Waters Acquity BEH C18 column (100 mm×2.1 mm, 1.7 μm) was adopted; the column temperature was 25°C; the mobile phase consisted of methanol-water with gradient elution at the steady flow rate of 0.3 mL·min-1; the detection wavelength was 202 nm. Mass spectrometry applied selected ion monitoring mode with m/z 255 (quantitative ion) and m/z 169 (qualitative ion). It was found that excellent linear relationship was obtained from the range of 10~200 ng·mL-1 (r=0.9991), the limit determination (LOD) of VLPVPR was 1.8 ng·mL-1, the recovery rate was 96.33%~100.76%, The inter and intre-day RSD were less than 7%. We thus conclude that a rapid and sensitive UPLC-ESI-MS/MS method was developed and validated for the determination of recombinant antihypertensive peptide VLPVPR in rat plasma. It can be applied to evaluate the pharmacokinetics of VLPVPR.

This paper proposes that arrays of spatio-temporal data matrix was constructed by the arrays of the received signal delayed in time gradient, Meanwhile, applying the method of ESPIRT to get the twiddle factor of the received signal array element and the array element of the time and the space, finally get the final information of Doppler frequency and the information of arrival angle though applying least squares method.

In this paper, the basis function of TDCS system (Transform Domain Communication System) is used to design cognitive radar transmitter waveform. Based on the noise environment, the waveform can be adjusted adaptively. Then after clipping to reduce the PAPR (Peak to Average Power Ratio) of radar echo signal, the obtained signal is used as the next launch of the radar signal. The cognitive radar transmitter requires a nonlinear waveform to improve the efficiency of radar transmitter power amplifier, so reducing the PAPR of signal is essential. This paper presents the gray complementary sequence is applied to TDCS communication systems, and then it needs to reduce PAPR of signals by clipping. Proven, PAPR of the transmitted signal is maintained at about 3.25dB, and the signal has a low probability of intercept, high anti-interference ability and distant target detection range.

In this paper, we employ semi-discrete finite element method to study the convergence of the Cauchy equation. The convergent order can reach. In numerical results, the space domain is discrete by Lagrange interpolation function with 9-point biquadrate element. The time domain is discrete by two difference schemes: Euler and Crank-Nicolson scheme. Numerical results show that the convergence of Crank-Nicolson scheme is better than that of Euler scheme.

Facial region detection has broad application prospects, but existing human face region detection methods have some rigorous requirements for the light conditions. Error detection about face area caused by the poor light conditions has a great bad effect on the follow-up processing, such as face recognition, fatigue degree evaluation based on visual. So face region detection in complex lighting conditions has always been the difficult problem. Therefore a self-adaptive illumination compensation method for color images has been proposed. Select the color face images database of the California Institute of Technology to test the method dealing with the face region detection by original image and the image after illumination compensation. In the simulation experiment, the method of Illumination compensation can effectively improve the detection accuracy. Lay the foundation for driver fatigue detection based on visual.

This paper achieved the realization to apply a hybrid fuzzy control algorithm to control the rotorcraft, which can it fly stably, load heavy things, carry easily and complete complex flight movements. The operation show that control system is effective and valuable.

Nickel-based catalysts were prepared by impregnating at different calcination temperatures to solve the problems of short lifetime, coking and hard to regenerate of HZSM-5 catalyst which was widely used as bio-oil upgrading catalyst. The NiO loading was 8wt. %, and the calcination temperature was 350~650°C. The surface characteristics, catalytic and regenerative properties of the catalysts were also analyzed and compared. When the calcination temperature is 550 °C, the catalyst shows good properties and the conversion of toluene and guaiacol is 83% and 80% respectively. The results of life-tests show that the adding of active material can help extend the life and improve the anti-coking ability of the catalyst. The conversion of toluene and guaiacol keeps at 40% and 50% respectively after 6h continuously catalytic reaction. The macromolecule aromatics in the catalyst channel can be converted into micromolecule aromatics by the adding of NiO.

Based on the investigation data of petroleum hydrocarbon (PHC) in waters in Jiaozhou bay on April, August and November 1981, this paper analyzed the distribution and changing of PHC content in surface and bottom waters. Results showed that pollution levels of PHC ranged from Grade II, Grade III, Grade IV and worse than Grade IV during year. PHC content was relatively high in near shore waters especially in river mouth waters, while was relatively low in bay mouth, bay center and outer bay. It could be concluded that, in addition to marine exploitation activities, rivers were important pollution sources of PHC.

Based on the deep analysis of current status of statistical information work, combined the actual work of North China Electric Power University, this paper combs the statistical data index system and interpretation system under the conditions of multiple data sources, and develops the statistical data collection model under the multiple management information systems integration environment. Then by using the computer tools, the North China Electric Power University statistical information collection system is developed. The data collection-submission process is solidified, and the statistical work has become more standardized. Finally, the suggestion and measures of carrying out the statistical work is given.

In the paper, transport of water and Cl- under leaching was 2D-digitally simulated with COMSOL Multi-physics. In a two-dimensional transient cross-sectional model. COSMOL was used to investigate water and solute transport in the soil column coupled with variable sand column forms, with “a” denoting no sand column, “b” with one vertical middle sand column, “c “ with one long Slanted sand column, “d” with two long Slanted X-shaped sand columns. The parameters of the model were primarily based on the soil physical properties measured at coastal clay loam saline soil in Tianjin. The simulation results showed that, given same initial and same boundary conditions, sand column increased the transport efficiency of water and salt, which depends on the position and angle of sand column accordingly. The slanted columns were overall superior to the vertical ones in transport efficiency. In sum, “d” was the best type, “c” was the second best and “b” was the third, according to the efficiency of salt leaching and the efficiency of the utilization of water resources.

The design of broadband access network is a key link in the construction of intelligent community. DSL, FTTx, WLAN and WiMax are the most common kinds of broadband access technologies. In this article, we provide the basis for solving the broadband access problem through the comparative analysis on the advantages and disadvantages of those technologies.

Under drip irrigation, the drip discharge has a great influence on soil water movement and crop growth. Studying the soil water movement rules makes great realistic significance to the precise management. Based on soil dynamics theory, we measured the water movement distance of saline soil in Changji Xinjiang through outdoor tests. Then, we built transfer function models between drip discharge and water movement distance under drip irrigation and applied the genetic algorithm to identifying and optimizing model’s parameters. Comparing the soil water movement model’s dynamic change at the same drip discharge, the model’s validity is validated. It can solve the feedback adjusting according to crop root, and the waste of water resource is reduced.

New energy power generation system needs interface converter to connect to the grid. Because the type of new energy is different, its interface converter is also different. In order to adapt to the diversification of the modeling and control strategy of the converter, a generalized interface model is established in this paper. The model is based on the electromechanical transient simulation, which ignores the physics switching device and simplifies the control module. Finally, adaptive verifications are made in PSCAD/EMTDC and Matlab/Simulink for photovoltaic power generation system and wind power generation system. The results of simulation prove the validity of the generalized model.

This paper analyzes the limitations of simple network management protocol (SNMP) which adopts the centralized service model, discusses the basic idea of AgentX frame and the agent’s operating principle, and has a brief analysis on AgentX protocol packets. Based on my experiences, the paper describes the implementation of MasterAgent/ SubAgent based on AgentX communication protocol, using the related source-packet.

High-capacity OLT equipments are widely used in modern communication network. Among the communication equipments, realization of alarm function has an important research significance and wide application prospect. The article simply introduces the demand of alarm of OLT devices and simple network management protocol SNMP and explains the method of realizing alarm information by using SNMP trap. It also introduces the construction of trap message and explains the process and action of network management system after receiving trap information in detail, as a result, realizes the alarm design of high-capacity OLT equipment.

Low Carbon accounting, as an emerging economic accounting model, has had a huge impact on traditional accounting model. In this paper, the characteristics of low-carbon economy and the corporate accounting problems will be discussed to explore how companies in the environmental perspective to optimize accounting applications, and to promote the healthy and rapid development of enterprises.

The current China railway freight transport has always been faced with the situation of limited transport resources. Many relative studies have been done to solve the problem of resource shortage. And railway freight volume prediction is the basis of all these studies. With accurate volume prediction, railway freight transport administrations can precisely allocate the transport resources, such as wagons and locomotives. In order to overcome the limitations of traditional prediction methods, in this study, we design four artificial neural network models for prediction, including BP neural network model, linear neural network model, RBF neural network model and generalized regression neural network model. The results of simulation and comparison show that all these models can reach high prediction accuracy and generalized regression neural network has both higher prediction accuracy and better curve fitting capacity compared with other models.

In terms of manufacture, operation and other aspects, many investigations, tests and analysis on microcomputer-based protection and monitoring device are made to overcome the problems brought by low temperature when installing the protection and monitoring device. This study reveals that ambient temperature has made an influence on protection devices components and display device and proposes the proper range of temperature and solutions. Also, the study solves the difficulties on the device installed locally at low temperature.

In this article, the semilattice decomposition of r-ample semigroups with left central idempotents is given. By using this decomposition, we show that a semigroup is a r-ample semigroup with left central idempotents if and only if it is a strong semilattice of , where is a monoid and is a right zero band. As a corollary, the characterization theorem of Clifford semigroups is also extended from a strong semilattice of groups to a strong semilattice of right groups. These theories are the basis that the structure theorem of r-ample semigroups with left central idempotents can be established.

Based on Newmark-β gradual integration method and elastic-plastic mechanical theory, numeriacl analyses of effects of soft soil depth and thickness and pile length on the characteristics of horizontal seismic response of bridge-foundation interaction system with soft layers conducted by using finite element program Midas/GTS. The numerical results show that: (1) The high frequency components of seismic excitations can be filtered and the low frequency components are amplified correspondingly when seismic waves are transmitted through soft soil layer, and thicker and lower soft soil layer can amplified this effects; (2)The extremum force of abutment shows decreases first then increases with depth decreasing, and displacement of abutment top and bottom has the same law with seismic waves, and the thicker and lower soft soil layer or shorter piles can aggravate abutment force and deformation; (3)Shear extremal stress shows decrease from top to bottom and the thicker and lower soft soil layer or shorter piles are adverse on piles; (4)Moment extremal expresses first increase then decrease with pile length and the lower and thicker soft soil layer or shorter piles can enlarged piles moment.

The interaction between pile and soil can not be ignored in the seismic analysis of long-span bridges. Earthquake action in the form of lateral load apply on the pile through the soil, the analysis of pile under lateral load is very important in aseismatic analysis of bridge. Analysis of the horizontal load pile-soil interaction by using finite element analysis software ADINA, establishing the three-dimensional contact model of pile-soil interaction and the analysis model by using p-y curve model of soil-pile interaction respectively. Comparing the displacement of the top of pile with the actual measurements to verify the numerical method is right. It shows that the feasibility of using ADINA for pile-soil interaction analysis.

On the basis of theory analysis, deep research was made about the implementation of force decoupling control of hydraulic shaking table. Because tested specimen has eccentric and height, which produce flywheel moment and overturning moment, and causes the non-synchronization of every exciter, so transient force decouple control (TFDC) strategy is introduced in order to remove this effect. Then, the control strategy was realized based on DSP rapid prototyping. TMS320C2812 DSP was applied to acquire the analogue and digital; TMS320C6713 DSP was used to operate and communicate with embedded processor S3C2410 by dual-RAM in order to improve real-time and rapidity. In the end, this paper presents the implementation of a rapid prototyping control system, which involves the design of DSP algorithms using MATLAB Simulink blocksets, automated code generation in the CCS integrated development environment, and downloading the executable code to the Texas Instruments TMS320C2812 and TMS320C6713.

This paper analyzed vehicle rollover dynamic model when vehicle steering and rollover is occurring, which based on basic vehicle rollover problems. Three-degree-of-freedom vehicle roll model which considering roll angle was established, and physical quantities of model were analyzed. Input and output quantities were analyzed based on vehicle roll model, feedback quantities were determined, too. Controller state reset was added into traditional controller switch module so as to avoid undesired instantaneous pulse which appeared during switching. Three-degree-of-freedom vehicle roll model was put up in Simulink, Controller parameters set was tuned and I/O data were prepared to optimize control effect. The control method in this paper was verified finally.

Based on analysis of the current situation of water view residences, this paper discusses the importance of waterscape design in modern residential districts and the existing problems of current research including management and structure design of waterscape, nature ecological environment destruction, waterscape design and utilization of resources. Several proposals are put forward such as ecological, regional, integration and sustainable development, to the waterscape design to keep the sustainable development.

In the WEB2.0 environment, the report of public events will appear on the Internet as soon as they occur and attract a large number of peoples attention in a very short time. It is believed that the Internet public opinion represents the social public opinion. Hence, it is very valuable to study the relationship between the Internet public opinion and mass emergencies. In this paper, we proposed an improved effect model of the Internet public opinion spreading on mass emergencies. Different from the original model, we use variables as the parameters of the equation instead of constants and the whole mass emergency is divided into five stages. In the first two stages, the new participants proportion u(t) and the new leavers proportion v(t) holds the inequality u(t)≥v(t), and in the other stages, they hold u(t)≤v(t). Simulations show that the design of our proposed model can well fit the mass emergency development process.

In order to understand the overall mechanical characteristics of a steel-concrete composite box girder bridge, static and dynamic tests were carried out. According to the results of tests and calculations, its bearing capacity and working performance were evaluated. The results show that the stress and deformation at control cross-section of the bridge meet design requirements under the static load, the vibration frequency and impact coefficient consistent with the theoretical calculation results under the dynamic load.

The mechanical behaviors and durability of concrete containing steel slag powder (SSP), silica fume (SF) and fly ash (FA) were presented in this study. The fresh concrete properties, compressive strength, split tensile strength, elastic modulus, stress-stain curve, chloride permeability as well as carbonation of concretes mixed with different SSP contents or concretes containing compound mineral admixture were tested. The experimental results reveal that the mechanical behaviors and durability of concrete with 10% SSP replacing cement are both improved than that of the reference concrete. Mechanical behaviors and durability of concrete with 20% SSP replacing cement are similar to the reference concrete. Concrete with compound mineral admixture of SSP and SF obtain the highest enhancement in both strength and chloride resistance.

Engineered cementitious composite (ECC) is a representative of the new generation of high performance fiber reinforced cementitious composites. To reveal the influence of mineral admixtures on the tensile mechanical characteristics of polyvinyl alcohol fiber reinforced engineered cementitious composites (PVA-ECC), the tensile properties of PVA-ECC with replacing cement by a significant amount of fly ash (FA), silica fume (SF) and metakaolin (MK) was experimentally investigated. Uniaxial tensile experiment was carried out using rectangular thin plate with sizes of 400×100×15mm3. Results from uniaxial tensile tests show that these mineral admixtures can improve the properties of PVA-ECC. The composite can achieve an ultimate strain of 2.0%, as well as an ultimate strength of 4.0MPa, with a moderate fiber volume fraction of 2.0%. In addition, the composites with FA, SF and MK show saturated multiple cracking characteristics with crack width at ultimate strain limited to below 175μm.

Beginning with studying the characteristics of the war from a complex system, the limitations of rule-based reasoning approach was discussed, case-based reasoning to the integrated reasoning mechanism was supplemented. In accordance with epistemological, researched on case-based reasoning mechanism of integration and components of decision model, studied feature vector based case representation and matrix representation of non-isomorphic case set, presented a case retrieval method based on feature.

This paper predicts the shear strength of high-strength steel fiber reinforced concrete (SFRC) beams without stirrups based on existing experimental test results from 5 previous studies. A suitable model was developed by performing linear regression analysis on the database. The adequacy of the model was examined from statistical point of view.

The shear thickening phenomenon was explained in this paper. The characteristics of shear thickening fluids (STFs), including reversibility and liquid to solid transition at critical shear rate were presented. Also, the applications of STFs for protective clothing and equipment were discussed. Since little references can be found which concern the effect of interparticle forces like Van der Waals forces on the performance of cementitious materials subjected to impact loading, understanding the mechanism of STF and knowing how its structure affects the properties, behaviors, and resulting applications is expected to inspire potential designs for building cementitious materials.

This paper presents a selective incremental information fusion method based on Bayesian network, so that the fusion algorithm can actively select the most relevant information and decision-making, and can make the fusion model to adapt to the dynamic changes in the external environment, and sensor information selection, fusion, decision-making integrated in the framework of Bayesian network . The experimental results show that this method is better than the traditional method.

The mechanization of rice transplanting technology (referred to as the machine transplanting rice), is another major renovation after cultivation technique in rice production. Compared with manual transplanting rice, machine transplanting rice has the advantages of high work efficiency, low labor intensity, high yield potential. This paper explains the main problems existing in the promotion of rice and mechanization of rice transplanting technology, puts forward measures and suggestions of technology promotion, and analyzes the mechanization of rice transplanting high-yield cultivation techniques.

Along with the continuous expansion of photovoltaic (PV) power generation, different capacity of grid connected PV system is gradually increased. China's first residential grid-connected PV system has interconnected successfully in QingDao and operated normally. This document analyzed electrical connected diagram of grid-connected PV system. Using power quality analyzer, the online power quality is monitored and analyzed. When PV power generation is low efficiency of operating state, harmonic current is over distortion limits. Monitoring data was simulated through electrical power standard source. To ensure power metering accuracy under harmonic, the watt-second method is proposed. Testing results show that smart electrical meter can meter accurately within 20 times harmonics.

Corrosion experimental were conducted in order to study concrete samples of two strength grades during different erosion period under the condition of designed artificial chloride erosion.Through drilling powder of concrete surface at various depths,chloride ions’concentration at different depths of corroded samples were determinated,and the diffusion coefficients of chloride ion after 90,180,240 days of corrosion were calculated on the basis of Fick’s second law.It turns out that obvious convection zone exitsin corroded concrete,and the thickness of convection zone increases with the erosing time and the reduction of concrete strength grade.In addtion,fitted datas of chloride ion diffusion coefficient increases with the reduction of concrete strength grade.

Function P-sets is a new mathematical model and structure, which is a new theory and method of studying the laws of dynamic information system. P-information law is the dynamic information law generated by function P-sets, which is information law pair composed of internal P-information and outer P-information law . Using the dynamic and law character-istics of P-information law, the study of attribute control and attribute control theorems of P-information are presented. Finally, the application of attribute control in image border information stabilization is given.

In order to make weather forecast data more precise and help users to make right decisions, a new method that applying participatory sensing in meteorological information service system is put forward in this paper. The participatory sensing architecture consists of four layers: sensing layer, data transmission layer, data processing layer and application layer. The key technologies involved in each layer are analyzed. Its explained how to fuse sensing data collected from sensors carried by users mobile phone with traditional meteorological data. The weather information service prototype system based on participatory sensing is realized. Through the example, its proved that this system is feasible and effective to improve the precision of weather forecast.

Function P-sets (function packet sets) is a novel mathematics structure and model. P-information law is generated by function P-sets, which is an information law pair composed of internal P-information law and outer P-information law . Using the generation and structure of P-information law, the attribute dependence, attribute dependence measurement and attribute dependence theorem of P-information law are presented. Based on the results, the application of P-information attribute dependence is given.

In this paper, the rule of index weight is determined by analyzing the existing rules of life assessment for concrete. Based on fuzzy decision making of binary comparison, the weight of different factor taking effect in complicated environment can be analyzed. With known effects of each factor, the classification and score of concrete durability can be made. Thus the assessment of concrete durability in complicated environment can be modeled. The model is used to predict the service life of concrete and provide optimize mix proportion design.

Based on the electric vehicle steering and speed models, this paper discussed the control problems of the electric vehicle steering and speed systems. Firstly, the electric vehicle speed control system is designed using the fuzzy PID controller. Then the electric vehicle steering controller is a fuzzy controller. Due to the coupled effect of speed in the steering control system, designing a fuzzy decoupling controller, reducing the coupled effect of speed, in order to control the system of steering model and speed model independently, and to achieve the purpose of decoupling. Finally, the result of simulation proves that no matter how speed changes, steering control system still has good tracking performance with decoupling controller. The systemic robustness is much stronger and it also enhances the utility of the control system.

Electrical resistance tomography (ERT) has been used as an alternative technique to monitor two-phase flow because of its high temporal resolution for monitoring fast transient processes. However the image reconstruction image with ERT in microchannel suffers from poor quality because of the interference of contact resistance. This paper aims at the solid-liquid two phase flow visualization in the cross-sections of a novel microchannel based on the ERT technique. Preliminary experimental results reveal that ERT image reconstruction technique base on Agilent data acquisition system can effectively detect the particle distribution in the microchannel.

In this file, the influence of the concentration of additive MPS on the Nuclei Population Density of copper electrocrystallization on a glass carbon electrode (GCE) with different potentials has been studied. The exponential curve has been used to fit test data. From this function, the most nuclei population density of copper electrocrystallization can be estimated under certain experimental condition. From analysis results, we can see that with different potentials, the nuclei population density has different limitations. When the potential is about-0.8 Volt, the largest value of the limitation of the nuclei population density can be achieved.

This mechanical processing waste emulsion for the study, handled by pulse electrolysis. Arrangements by orthogonal testing, experimental study on plate distance (d), current density (i), the pH value and the pulse width (tP) impact on COD removal efficiency, very poor analysis of test data to determine various factors affecting the COD removal efficiency of primary and secondary sort: pH value > current density > pulse width > plate distance, optimal operating conditions. Orthogonal experimental data derived from regression analysis, determination of cross of quadratic polynomial regression equations, mathematical model. Tests confirmed that pulse electrochemical method for treatment of waste emulsion with low energy consumption, short response time, and other advantages, strong applicability of wastewater, building mathematical models, providing theoretical basis for subsequent design.

In order to solve the complex thrust allocation problems of dynamic positioning ship with azimuth thrusters, thrust allocation and management system was built. The power optimal thrust allocation was formulated as a quadratic programming problem by the linear treatments of inequality constraints and the optimal solution could be found in a finite amount of time. And some influence factors of thrust allocation were separated from algorithms and treated as a superstratum management module. Using this system, online adjustment of input constraints and singularity avoidance can be realized, and the reliability and adaptability of thrust allocation are improved consequently. Finally, the validity and excellent performance of this method is proved by the simulations.

Experimental investigation results of the fuel injector group in a heavy-duty gas turbine are presented. Atomization characteristic has great impact about combustion, inflame, temperature field of outlet. Obtained atomization characteristic about spray particle size and spray angle using LDV/PDPA system, determined dimension of injector group. On the basis of these tests, the combustion testing of the injector group in the flame tube is made, its every targets are arrived in the design requirements. This has demonstrated: the test systems and test methods are practical, feasible and reliable. These experimental data have provided the reliable basis for the injector group design and development.

Mine gas composition is complex, and its main component is methane (CH4), followed by carbon dioxide (CO2) and nitrogen (N2), also contains a small amount or trace amount of heavy hydrocarbon gases (ethane, propane, butane, pentane, etc.) , Hydrogen (H2), carbon monoxide (CO), sulfur dioxide (SO2), hydrogen sulfide (H2S) and so on. For gas detection, the gas compositions above with listed behind CH4 becomes its interference noise. A second harmonic modulation of the fiber laser was used to achieve low concentration of coal mine gas monitoring against a multi-component-gas background noise, and an early warning can be accomplished.

In order to study the whole system performance of dynamic positioning ship, a simulation platform which contains environment and ship model, as well as basic guidance, navigation and control functions is established. Besides the ordinary ship and environment modeling, a guidance method for waypoint following is designed by using path interpolation and circle of acceptance. A sensor-fusion based federated filter is proposed to deal with the problem of state estimation and wave filtering. To make the whole system becomes a closed loop feedback system, a PID method are applied to deal with the control problem. By using this simulation platform, this paper simulates and studies the basic functions of a typical dynamic positioning ship. Finally, the simulation proves the validity and excellent performance of this dynamic position ship simulation platform.