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This paper presents a summary of recent developments in modeling and optimization of machining processes, focusing on milling operations. With a brief analysis of research on machining parameters selecting system, in this system, a compact selection method based on expert rules, which were obtained from experimental results and extracted from the knowledge of skilled operators, is presented. Expert...
The shadow price is an important methodology of allocating resources. However, the definition approach of the shadow price limits its application, which is often overlooked. If taking the total revenue function (TRF) of resource as a piecewise linear function, shadow prices can be determined by TRF's direction derivative. This method can not only get the shadow prices of uni-resource in different...
This paper proposed an unconstrainted optimization method based on BP neural network, and take Unipolar Sigmoid function as the transfer function,and take maximize network output as example,derived and given the partial derivatives of the BP neural network's output to input.On this basis, give a general mathematical expression that based on the BP neural network unconstrainted optimization issues,and...
The paper makes further research on estimating the parameters of the asymmetrical model describing effect of nutrient base on present literature, and provides a new method for estimating parameters that this method combines one-dimension search of optimization theory and multiple linear regression. The method not only overcomes the faultiness of estimation methods in existing literature, but also...
By mapping the pump and the injector of 16V265H diesel engine, it comes to the conclusion of the structural parameters of the fuel injection system for electronic control unit pump. GT-Fuel is used to establish and perform the simulation model of fuel injection system for 16V265H diesel engine. Compared with that of local locomotive fuel injection system, the performance curve of 16V265H diesel engine...
Operating municipal infrastructure projects are a special operation model that the Government and the project investors achieve the operating infrastructure projects by signing infrastructure concession contracts. This paper is aimed at the feature of operating infrastructure projects to achieve the objective of maximizing the value of the projects, under the conditions the concession period and the...
A new type of monorail hanging technology was invented to solve the auxiliary transportation problem in soft rock or coal bed roadway, and clearly introduced the hanging scheme and making a feasibility analysis. This new type of monorail hanging technology makes the monorail application in soft rock or coal bed roadway to be possible, solves a major problem in mine auxiliary transportation mechanization...
According to economic ideas of Gary s. Becker, this paper builds the decision-making model of rural highway scales from the perspective of farmers under funds constraint, and gets the equilibrium condition of rural highways scales. Then with the figure analysis, the paper discusses impact mechanism of the several factors such as the financial structure of rural highway, rural urbanization, rural economic...
In order to descript how Database Technology can be used in Network Document Management System, this paper analyses the requirement of the system, and then, the paper descript the detail from these aspects: database design, security design and database optimization. Firstly, the paper shows how we can design the data storage method and the database of network document management system so that the...
Rationally determining the scale of production is one of the key technical problems of the mining from open-pit to underground. In this paper, technical, economic and social factors on the production scale of Daye Iron Mine are considered comprehensively, and the theory and method of fuzzy comprehensive evaluation are used to select. Then, verified by the gray system theory, the optimal scale of production...
The paper makes analysis of the optimal currency composition of international reserves based on Markowitz mean-variance model using Monte Carlo simulation for solution. We calculate US dollar and Euro as the two major reserve currencies for 2007 through 2009, which is also the financial crisis stage. The model suggests to decrease US dollar in late 2007 and to increase US dollar in mid 2008. Our findings...
This paper presents a probabilistic numerical approach for stability analysis of soil and rock slopes. The slope is divided into a family of inclined slices, and according to the upper bound theorem in plasticity theory, a work-energy balance equation is constructed for each soil/rock slice. Geotechnical parameters such as the cohesion, the friction angle and the pore pressure ratio etc. are modelled...
Most EOL electronic products come from industrial by-products and consumer goods as solid waste. Recycling the EOL electronic products is a complex and long term process. This paper focuses on the location and routing problem of electronic products recycling center. Firstly this paper applies AHP method to select the locations of electronic products recycling centers, and sort various elements by...
Vehicle routing problem is an important combinatorial optimization problem. It has an important position in logistics optimization and supply chain management theory. Due to traffic flow, traffic incidents and other factors, the travel speed and travel time of road has large time-variability and randomness in real transport network. The study of vehicle routing problem in time-dependent network has...
Regarding order arrival obeying Poisson flow and general service distribution of single picking servicer as M/G/1 random service system, the efficiency optimal problem of manual order picking system is studied. Picking route stochastic model under random storage S-type picking condition is built. It makes model approximation calculation with simulation result under order random arrival frequencies...
Because that transport links are not being considered enough in the existing decision making optimization model of manufacturers' order fulfillment, linear optimization model of manufacturers' order fulfillment is built according to factors as transporter, transport mode, type of line, model, and transportation of goods, transport origin and termination which have combined effects to transportation...
For realizing automatic voltage control and automatic protection, the traditional mechanical potentiometer was replaced by an automatic unit with hardcore device: microcomputer-single chip and digital programmable potentiometer (DPP), and the power voltage of the electrostatic precipitator (ESP) were adjusted exactly by the auto unit. The automatic control process of the ESP's work voltage was described...
The no-load steady-state performance of a Y-connected three-phase induction generator under single-phase operation is studied, and the effects of combination between balance capacitors and excitation capacitors on the terminal voltage are analyzed. The loop impedance equation is obtained by employing the symmetrical component method. With both real and imaginary parts of the loop impedance equal to...
In this paper, we consider fuzzy variable weight combining forecasting which based on optimal combining forecasting and integrate those two modeling methods. Studies show that: optimal combining forecasting combines forecasting methods in a period of time and makes forecast through fixing the weight of forecasting methods that in the combination. But it does not consider that the weight will vary...
Abstract-Improving the operation and management level of coal washing is an important way to enhance their competitiveness for modern coal washing enterprises. The article establishes the comprehensive operation optimization management system of modern coal washing enterprise that are the operation optimization management involving the all-direction, the whole process and full-time interval, and describes...
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