This paper represents the Procedure geometry detail enhancement algorithm of Chunklod. The enhancement algorithm adopts massive model as processing unit. Because the Chunklod algorithm lacks process that viewpoint is ...
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This paper represents the Procedure geometry detail enhancement algorithm of Chunklod. The enhancement algorithm adopts massive model as processing unit. Because the Chunklod algorithm lacks process that viewpoint is near to the ground. The enhancement algorithm improves the efficiency of rendering by combining the local triangle surface simplified algorithm and the error evaluation & control algorithm, it avoids large-scale computing caused by over-LOD. Finally ,the paper shows that the visual effect of terrain information is expressed well when the algorithm is working virtually-taking the geographical information system for example .The results indicates that the improved level of detail enhancement of ChunkLod is a practical terrain algorithm with total levels of detail technology.
Velocity threshold is an important parameter to affect the performance of particle swarm optimization. In this paper, a novel velocity threshold automation strategy is proposed by incorporated with Leávy probabil...
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Coal pyrolysis can be significantly affected by CoCl2 catalyst. In this paper, the effect of CoCl2 catalyst on the pyrolysis of Huolinhe lignite was investigated in a spout-entrainment reactor and in a thermogravimetr...
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ISBN:
(纸本)9781604238617
Coal pyrolysis can be significantly affected by CoCl2 catalyst. In this paper, the effect of CoCl2 catalyst on the pyrolysis of Huolinhe lignite was investigated in a spout-entrainment reactor and in a thermogravimetric cell. The results showed that the yield of total volatile from lignite fast pyrolysis using CoCl2 catalyst was twice as much as that without CoCl2 catalyst. Moreover, the main components of light tar, including phenol, carboxylic and aliphatic groups were also increased by 150 %, 83 %, 100 % and 200 %, respectively. On the contrary, the slow pyrolysis of lignite was inhibited by CoCl2 catalyst: the yield of total volatile and the yields of phenol and carboxylic groups were all decreased. The different effect of CoCl2 catalyst on fast and slow pyrolysis of coal might be attributed to secondary cracking of tar precursors. In order to recycle Co catalyst, CoCl2 was impregnated to clay zeolite. The catalytic effect of Co-clay zeolite is lower than that of CoCl2 directly impregnated to lignite. However, catalytic pyrolysis of lignite with Co-clay zeolite should be feasible in an industrial setting because it's easy to be separated and recycled.
A new method and apparatus is proposed to improve the precision and reduce the cost of photoelectric encoder measurements. The method is based on highest resolution measurement and completely statistical analysis. The...
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A new method and apparatus is proposed to improve the precision and reduce the cost of photoelectric encoder measurements. The method is based on highest resolution measurement and completely statistical analysis. The system includes a stepping motor, a high precision worm reduction gear, a high speed single chip microcomputer, a low cost incremental optical electric encoder and some multi interfaces of communication protocols. The single chip microcomputer as the lower system can test and collect the optical electric encoder. The PC computer as host-computer can deal with the test data. The precision of the system can reach 18 binary digits. Results of application in practice showed that the method and apparatus is efficient and effective, the cost of the apparatus is less than the some kind of system.
Focuses on a method of parameter identification from indirect data, generated by indirect model. The indirect data are preprocessed in order to approximate the direct data generated by original model. Parameters of th...
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Focuses on a method of parameter identification from indirect data, generated by indirect model. The indirect data are preprocessed in order to approximate the direct data generated by original model. Parameters of the original model are identified from the approximate direct data. This method is employed to establish ballistic mathematical model of projectile based on firing table data. A ballistic integrated coefficient is proposed and identified by parameter identification method in order to establish ballistic mathematical model. The data used in identification are approximated by firing table data. Computation showed that the method was more precise than the simple table lookup method. Moreover, the method is a low-cost way to identify parameters and establish ballistic models.
In this paper we discuss the development and utilization of a simulation that was designed to enable engineers to investigate and exercise prototypical cooperative control algorithms and user interfaces for a system t...
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ISBN:
(纸本)1563479060
In this paper we discuss the development and utilization of a simulation that was designed to enable engineers to investigate and exercise prototypical cooperative control algorithms and user interfaces for a system that will allow a single operator to control a team of unmanned aerial vehicles in an urban area. One such operational scenario is that of a small unmanned aerial vehicle flying over an urban area, dispensing micro-aerial vehicles to examine points of interest from a close distance. The Air Force Research laboratory is currently conducting a research program entitled Cooperative Operations in UrbaN TERrain (COUNTER) designed to develop and investigate cooperative control algorithms, software, and hardware needed to perform such a mission. The type of simulation discussed in this paper is one of four different simulation types that are being used to develop and test the COUNTER systems. These simulations include an engineering simulation, an Engineer-in-the-Loop simulation (EILSIM), an operator interface development simulation, and an operator-in-the-loop simulation. While the COUNTER-EILSIM is the focus of this paper, we briefly describe the other simulations and how they fit into the development and testing process.
Gather the information of the environment by the monocular vision. Using the H and S weight of the HSV color model, separate the target from the environment with a certain color, by a fast clustering algorithm for two...
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ISBN:
(纸本)7900719229
Gather the information of the environment by the monocular vision. Using the H and S weight of the HSV color model, separate the target from the environment with a certain color, by a fast clustering algorithm for two-value image segmentation. Calculating the distance between the camera and target by the 3D reconstruction algorithm and sub-control strategy, and raise its veracity by laser information fusion. Furthermore, a vision servo system has been designed and utilized to achieve the robot's dynamic track. At last, some experiments were used to certification its availability.
A Backlash neural network model is proposed for the systems with hysteresis nonlinearity. In order to approximate the hysteresis nonlinearity, Backlash-type operators are used as one layer of the neural network. Then,...
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A Backlash neural network model is proposed for the systems with hysteresis nonlinearity. In order to approximate the hysteresis nonlinearity, Backlash-type operators are used as one layer of the neural network. Then, the number of Backlash operators and neurons of hidden layer are gotten through simulation. Compared with the normal BP network, the results show the improvement validity of the proposed Backlash neural network model for describing the hysteresis nonlinearity.
A new conversion method for fault tree (FT) to binary decision diagram (BDD) was introduced. Firstly, FT was reduced and the reduction rule was proposed, share-node conception was introduced on the basis of FT decompo...
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A new conversion method for fault tree (FT) to binary decision diagram (BDD) was introduced. Firstly, FT was reduced and the reduction rule was proposed, share-node conception was introduced on the basis of FT decomposition, then the rules of connection of component BDD was proposed. Furthermore the route-based BDD reduction rule was proved, with which reduction can be done at the same time with BDD composition, and the route sequence and cut sets can be obtained, while computation and storage is greatly reduced during the process. Finally, the procedure of the transformation is presented. The affectivity effectiveness and practicability is thereby proved.
One problem of marriage in honey bees optimization (MBO) is that its complex computation process will limit its applications. The paper proposed an improved marriage honey bees optimization (IMBO). By randomly initial...
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One problem of marriage in honey bees optimization (MBO) is that its complex computation process will limit its applications. The paper proposed an improved marriage honey bees optimization (IMBO). By randomly initializing drones and restricting the condition of iteration, the calculation process becomes easier. The global convergence characteristic of IMBO is also proved based on the Markov chain theory. With different number of nodes, traveling salesman problem(TSP) is used to compare the IMBO with MBO and genetic algorithm(GA). simulation results show that IMBO has better convergence performance.
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