Luoyang Hydraulic Engineering Technical Institute

Luoyang, China

Luoyang Hydraulic Engineering Technical Institute

Luoyang, China
SEARCH FILTERS
Time filter
Source Type

Pan Z.,PLA University of Science and Technology | Pan Z.,Luoyang Hydraulic Engineering Technical Institute | Fu Z.,PLA University of Science and Technology | Shi L.,PLA University of Science and Technology | And 2 more authors.
Mathematical Problems in Engineering | Year: 2017

The unconditionally stable method, Associated-Hermite FDTD, has attracted more and more attentions in computational electromagnetic for its time-frequency compact property. Because of the fewer orders of AH basis needed in signal reconstruction, the computational efficiency can be improved further. In order to further improve the accuracy of the traditional AH-FDTD, a high-order algorithm is introduced. Using this method, the dispersion error induced by the space grid can be reduced, which makes it possible to set coarser grid. The simulation results show that, on the condition of coarse grid, the waveforms obtained from the proposed method are matched well with the analytic result, and the accuracy of the proposed method is higher than the traditional AH-FDTD. And the efficiency of the proposed method is higher than the traditional FDTD method in analysing 2D waveguide problems with fine-structure. © 2017 Zheng Pan et al.


Zhao Q.,Jilin University | Zhao Q.,Luoyang Hydraulic Engineering Technical Institute | Li Y.,University of Science and Technology Beijing | Yang N.,University of Science and Technology Beijing | And 2 more authors.
2016 IEEE International Conference on Signal and Image Processing, ICSIP 2016 | Year: 2017

This paper proposes a recognition approach for Semaphore flag signaling (SFS). We use the improved convolutional neural network (CNN) to classify the SFS. In the experiment we made Semaphore flag signaling system (SFSS), which based on CNN. The image can be directly input into the SFSS. Each alphabetic character or control signal is indicated by a particular flag pattern. We shoot the SFS videos by a monocular camera. The dataset is divided into five SFS classes. The improved CNN uses the Relu activation function, the max-pooling methods. It's alway use SFS data whitening and grayscale preprocessing methods. The improved CNN provides for partial invariance to different light, angles, scenes, and a group of people. The result shows that our approach classifies five SFS classes with 99.95% accuracy. © 2016 IEEE.


Weifeng Z.,PLA University of Science and Technology | Weifeng Z.,Luoyang Hydraulic Engineering Technical Institute | Zhikun G.,PLA University of Science and Technology | Dapeng L.,PLA University of Science and Technology | And 3 more authors.
Research Journal of Applied Sciences, Engineering and Technology | Year: 2013

In order to find effective method to decrease the dynamic effect, the arched structure with the spring-settlement support was designed. The parameters such as pressure, strain and displacement was determined to investigate the influence of the shallow-buried and the spring-settlement supported structure's bearing capacity under the dynamic loading. Experiment showed that the bearing capacity of the shallow-buried structure with the spring-settlement support was much enhanced as compared with conventional support under the dynamic loading. Experiment also proved that how much in a degree the spring- settlement support influence the bearing capacity is relative to spring's rigidity. © Maxwell Scientific Organization, 2013.


Zhang W.-F.,PLA University of Science and Technology | Zhang W.-F.,Luoyang Hydraulic Engineering Technical Institute | Guo Z.-K,PLA University of Science and Technology | Ren W.-J.,PLA University of Science and Technology | And 3 more authors.
Advanced Materials Research | Year: 2013

Small span arch steel structures on spring-settlement support and normal support were designed as research objects. 1kg, 2kg, 3kg and 5kg TNT group charges were detonated respectively on the center surface of backfill above the structures. Numerous data was obtained during these tests. The comparisons of measured parameters were done between the structures with spring-settlement support and normal support. The results indicate that, the structure with spring-settlement support can reduce the magnitude of internal force, decrease the dynamic effects significantly, and enhance thebearing capacity. © (2013) Trans Tech Publications, Switzerland.


Zhang W.,PLA University of Science and Technology | Zhang W.,Luoyang Hydraulic Engineering Technical Institute | Guo Z.,PLA University of Science and Technology | Li D.,PLA University of Science and Technology | Yan F.,PLA University of Science and Technology
Journal of Information and Computational Science | Year: 2014

In order to analyze the dynamic response of flexible bearing-soil-structure system under explosion, and the affecting factors, the dynamic model of flexible bearing-soil-structure system is established, and the simulation analysis is carried out. First, the research development at home and abroad is summarized. Second, the simplification of explosion effect is discussed. Then, the explosion dynamic models of flexible bearing-soil-beam and flexible bearing-soil-arch system are constructed respectively. Finally, the weakened effect of stiffness and damping of flexible bearing on the explosion load, and the effect of the deflection and the inner force are obtained. 1548-7741/Copyright © 2014 Binary Information Press.


Du J.,Luoyang Hydraulic Engineering Technical Institute | Li W.,Luoyang Hydraulic Engineering Technical Institute | He Y.,Luoyang Hydraulic Engineering Technical Institute | Lv X.,Luoyang Hydraulic Engineering Technical Institute
Advanced Materials Research | Year: 2011

in this paper, the dynamic performance of the single rod magnetorheological damper (MRD) without accumulator in different working status is researched, which is a new type of MRD developed by us to apply in the environment of explosion and shock. It is concluded that there is no offset force in the new MRD. The maximum damping force and energy absorption capability increase non-linearly with the excitation current and piston's velocity. The mechanical model of this type MRD is proposed. By comparison of the results of tests with simulation, it is proved that the mechanical model proposed in this paper can simulate the dynamic performance of the new MRD accurately. © (2011) Trans Tech Publications.

Loading Luoyang Hydraulic Engineering Technical Institute collaborators
Loading Luoyang Hydraulic Engineering Technical Institute collaborators