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In order to predict gas-liquid-solid multiphase mixing effect in the gas-liquid-solid three-phase reactors, a novel method based on image processing technology, fractal dimension and CFD technology is introduced in this work. Each pattern produced by phase transition in the stirred reactor are continuously eroded and binarized five times. Evolution profile of the fractal dimension slope value P of...
This paper researches on oil pressure characteristic in the shift control unit of a heavy vehicle's automatic transmission. The simulation model of its control unit was founded in the ITI-SimulationX software. Through a bench experiment, the correctness and effectiveness of the model has been checked. To solve the early failure problem of the clutch in the road test, optimizing its oil characteristic...
The concept and technological composition of aircraft assembling process oriented assembly field is presented, its key technologies are explored respectively, the assembling process database is built based on Oracle system, the method and the procedure of assembling process simulation and optimization are formulated, and the visualization technology concerned with all kinds of assembling process information...
A level set method for shape optimization of the Stokes fluid flow is presented. Since the level set method is implemented in an Euler framework, the computational cost is moderate. The velocity field on boundaries is obtained by shape sensitivity analysis using the material derivative concept and adjoint variable technique. A Benchmark examples is provided to illustrate the efficiency and feasible...
The driving modes of a parallel-series hybrid electric vehicle (HEV) were analyzed. The system efficiency models for the HEV at the charging and discharging mode were proposed based upon the engine efficiency map, motor/generator efficiency map and battery efficiency map. The optimization of energy management strategy for the hybrid system was studied, whose optimization target is the maximum of discharging...
Ant colony optimization(ACO) provides an effective way to solve combinatorial optimization problem. However, with the complexity of the problem increasing, the ACO algorithm needs considerable computational time and resources to improve the good quality of solution, and this rarely satisfies the requirement of real-time computing in M&S (Modeling and Simulation) area. Parallel implementation of...
How to enable the manufacturing shop scale suitable is a big problem on the condition. It depends on the characteristic of the manufacturing shop logistics information flow and establishments in the manufacturing shop. Firstly, the information entropy is introduced to acquire the degree of oder relationship among the establishments in the manufacturing shop in this paper. Secondly, petri nets is applied...
The design of heating plate is a typical heat conduction inverse problem about heating source calculation for thermal field of the plate. It's difficult to solve the inverse problem, which is large calculation and low efficiency. This paper puts forward a way to translate heat conduction inverse problem about heating source calculation to an optimization problem to solve, whose optimization target...
Reliable and timely decision on target onset is the key of decision-based single-model techniques for maneuvering target tracking, and the performance of maneuver detector can be improved by making use of Doppler measurement extensively. In this paper, a novel approach for detecting unknown maneuver is proposed. To avoid the unresolvedness of acceleration estimator when measurement noise level is...
It is urgent to solve the problem of how to accurately understand users' behaviors of visiting websites in the development of e-commerce. Web log mining is an important research method in addressing the problem. In this paper, we propose the new concept of interest pheromone, and on the basis of which design a group users' navigation path mining algorithm based on ant colony algorithm. The experimental...
Double crank four ring-plate-type pin-cycloidal gear planetary drive is a new-type drive with new drive principle. In order to reduce weight of the whole drive, the method of shape optimization of ring-plate in the double crank ring-plate-type pin-cycloidal gear planetary drive was derived. It bases on the principal idea of structural boundary strength optimization method, makes use of APDL in FEA...
Multi-agent systems have been proposed as a promising technology for addressing many problems in distributed information management, Internet and so on. Decomposing and allocating asks in MAS has proved to be a NP-hard question. The approach based on And/Or graph solving this question has been proposed and verified by simulation which offers a new way for tasks planning in MAS.
Coordination is essential for improving supply chain performance. This paper studies channel coordination through buy-back contract between a two stage supply chain consisting of one dominant retailer and one manufacturer trading perishable goods. The coordination between the two parties is achieved through buy back contract in such a way that their respective profit is better than that resulted from...
The existing RP(rapid prototyping) related software include a CAD module, a data processing module, and a monitoring and controlling module, which are independent of one another. Aiming at the issues above, this thesis picks-up the interior topological and geometrical information of model expressed in the boundary representation (B-Rep) using the development tools of ObjectARX and MDT(Mechanical Desktop)...
The technology of adaptive analysis model of remote sensing image segmentation has specific analysis model and evaluation standard in every commercial applications. And the index and weight of evaluation have great subjectivity. It need introduce scientific method to determine the effective index. The image is descripted using the model of graph in this paper. The remote sensing image is segmentated...
Based on the technology of Linux Virtual Server, the load balancing system could solve server bottleneck problems which were brought by the development and application of Internet, network of geometric growth of subscribers and network flow. WLC scheduling algorithm is often adopted, and is a good effect. This paper puts forward a kind of optimization methods based on server performance calculating...
Ant Colony Algorithm(ACO)has much more advantages in solving Vehicle Routing Problem with Time Window(VRPTW). However, with the increasing scale of the problem, ACO algorithm is liable to present some defects such as the long searching time and the high possibility of stagnation. To avoid these problems and solve the multi-objectives VRPTW problem, a new dynamic adaptive ACO algorithm which makes...
In this paper, the authors study several existing notions of well-posedness for vector K-quasiconnected optimization problems. By using the relationship of L(B)-well-posedness and well-posed in the generalized sense, under some compactness assumption, K-quasiconnected problems are well-posed.
Basic ideas and computing frameworks of CO (Collaborative Optimization) which is applied to complex system design are introduced. Reliability theory is introduced into CO, and reliability restraint is applied to optimization design. Within the optimization of systematic level of Collaborative Optimization, the slack variable is introduced to let the restraint of consistency equality be transformed...
By analyzing the deficiency of the previous structural design of the guyed anchor. The essay studies the design optimiization of the guyed foundation of the transmission line repair tower. It designes the most safe, economical and rational foundation type through building mathematical optimization model using of existing design theory of tower, applying the matlab optimization toolbox, preparing to...
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