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Automatic recognition of residential areas in high resolution images becomes one of hotspots in the remote sensing field. Feature selection of residential areas is crucial which affects the corresponding recognition results; however, it is very difficult to select optimal residential area features. Particle swarm optimization (PSO) is a new evolutionary computing technique which was developed through...
A large drainage pumping station by lateral oblique water way, which installed five shaft tubular pump, with single pump design flow 34m3 / s. The numerical simulated and hydraulic optimization is worked by using three-dimensional simulation software CFD on pumping station pool rectifier. Analysis results from numerical simulation: within a certain hydraulic losses range, the retaining water weir's...
The effects of Sequencing Batch Biofilm Reactor with polyurethane foam as microorganisms immobilized suspended carriers was tested under the optimal operation conditions, with aerobic, anaerobic, anoxic mode, texted and analysis the effluent indicators of TN, TP, NH4+-N, COD under the optimal conditions acerbic process, 2hr for aerobic process, 1hr for anoxic process, 10min for clarification, 5min...
With the development of satellite-positioning technology and people's desire for higher positioning accuracy, the current reference-centric coordinate system will be difficult to meet the demand.
Design phase is very critical in controlling investment of construction projects. The method of cost control mainly focuses on selecting and optimizing the design plan, implementing quota design and improving design budgetary estimate and construction drawing budget checkup in the design phase. This paper applies value engineering principle to selecting and optimizing design plan with a real case,...
In this paper, a numerical optimization of a radial turbine impeller is developed, which combines popular techniques such as artificial neural networks, genetic algorithm, database and CFD analysis tools. Multi-objective aerodynamic optimization is performed by using software FINETM/Design 3D. The performance parameters in the terms of total-to-static efficiency, expansion ratio are defined as optimized...
One practical method to increase the density of Habrotrocha sp., which is a kind of useful bdelloid rotifer in the wastewater biological treatment system, is to cultivate the metazoa in certain numbers and then put it into the treatment system. Therefore, it is necessary to develop a method which can efficiently cultivate Habrotrocha sp‥ In this paper, the optimization of culture condition for Habrotrocha...
The downwarping of the crane girder not only can influence the perforamnce, but also increase the energy loss. The importance of the pre arch to the bridge crane is put forward and reasonable pre arch curve can keep the vehicle move along a straight line. At last, the design of arch curve based on the finite element technique and structural optimization technology is discussed, which connects arch...
The structure optimization design of bridge crane based on HyperWorks is studied in this paper. The girder structure of the bridge crane can affect the performance of the bridge crane to certain extent. Based on the structure optimization technology of HyperWorks, the topological optimization, shape optimization and size optimization for one 50t bridge crane have been researched. The analysis results...
Changsha-zhuzhou-xiangtan urban agglomeration and Zhongyuan urban agglomeration are two important central dense regions in the central area of China. This paper adopts some methods such as comparative analysis, establishment abstraction mathematical model by the fractal theory to comparison and analysis the spatial structure of the two urban agglomeration, and strive to find the advantage and disadvantage...
Efficient use of urban rainwater can reduce the urban waterlogging and ease water crisis; In urban landscape construction process can be the use of rainwater organically, make landscape not only has the visual beautification, ecological optimization and has more rainwater resources use function; In landscape design can pass through rain gardens, roof gardens, green streets to achieve these functions,...
The establishment of the municipal sewage plants has significantly improved the urban water environment, while their tail water has a certain impact on urban river's water quality, especially on the near-field. Currently, there are two main discharge modes of the tail water, namely centralized and decentralized discharges. As the increase of river restoration projects, for example riverbank treatment...
The grey theory and fuzzy theory combined assessment decision model were constructed for shan-meng expressway soft foundation treatment based on the grey theory and fuzzy theory, which considers the uncertain and fuzzy character of engineering geology, engineering cost, construction technique, effect of improvement and engineering reliability. The weights of affecting factor are calculated by improved...
UAVs may encouter execrable weather, terrain threat, firepower threat or task object changed while it was flying along the fixed route, a real-time route planning method was proposed. The mechanism how to solve these unexpected problems while flying was given. The rule of state conversion and pheromone updating were improved on the basis of traditional Ant Colony Algorithm(ACA). Some parameters were...
The atmospheric environmental pollution has become a global environmental problem. It is imperative to monitor the toxic or harmful substances and environmental risk source in the atmosphere. However, it is the main contents of atmospheric environmental monitoring work to optimize the monitoring sites determination. This paper illustrates the implication and necessity of the monitoring sites optimization...
In this paper, we propose a region-based MRF model with optimized initial regions (RMRF-OIR) for image segmentation. In the RMRF-OIR, a modified mean shift is introduced to get the optimized initial over segmented regions. Then, a region-based MRF is used to model these initial regions on the region adjacency graph. Finally, the segmentation results will be obtained by using a region merging scheme...
One of the key issues of the ESP's collection efficiency is the control of collection parameters. Reasonable shaking periods and collection voltages control can effectively improve the collection efficiency. This article start from the non-steady state premise to research on the charge density of dust layer, electric field parameter changes model, and analyze the variation of collection efficiency...
This paper studied the efficiency of the oilfield water injection system by using the water injection system theory, fluid mechanics theory, and graph theory and optimization design technology. According to the actual conditions, the paper established the mathematical model of Wuliwan oilfield pipe network. Based on the actual data of production, energy distribution of oilfield water injection system...
Previous methods of optimization are designed for determinate quantum, which can hardly used in optimizing the parameters in traffic state detection algorithm, since traffic state is a fuzzy variable based on the sense, and it is different to determine a benchmark for optimization. This paper puts forward a driver-based evaluation approach which can solve the vague problem in determination of traffic...
Since the province of Yunnan carried out weight calculating program, We have achieved preliminary accomplishments on administering overload and over limit transportation, decreasing traffic accident happening, highway property protecting. But, as the result of our province implement this program still very short, there are many problems in practical experience and these problems needs to be resolved...
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