Yu Q.,Yanshan University |
Yu Q.,Henan Polytechnic University |
Shi Z.,Sippr Engineering Group Co. |
Zheng D.,Yanshan University |
And 2 more authors.
International Review on Computers and Software | Year: 2012
The frequent occurrence of electrical fire is harmful to human's lives and property. Arc fault is an important reason for the cause of electric fire, comprehensive and effective detection of fault arc is the content of this paper. In the comparisons, the current signal is used for the detection physical parameter and the wavelet transform is used to study the arc fault detection. First constructed the wavelet function, then carried out the arc fault's wavelet singularity detection, finally analyzed the current signal by the method of wavelet approximation. © 2012 Praise Worthy Prize S.r.l.
Wang G.-C.,Zhengzhou University |
Li W.-S.,Sippr Engineering Group Co.
Bridge Construction | Year: 2014
To study the effect of vehicle eccentric loading and vehicle spacing distances on the dynamic responses of cable-stayed bridge, the Changmen Bridge (a hybrid girder cable-stayed bridge with double pylons, double cable planes and with a main span of 550 m) in Fujian was taken as an example and was analyzed. Based on the finite element method and dynamic equilibrium principle, the mechanical models and vibration differential equations for the two subsystems of the vehicles and bridge were respectively built. On the principle that the compatible displacement conditions and dynamic interaactive forces of the subsystems were equivalent, the ANSYS was used to compile the APDL command stream for iterative calculation, the vibration differential equations for the vehicle-bridge system were solved and in consideration of the different eccentric loading degrees and spacing distances of the vehicles, the structural responses of the bridge were analyzed. The results of the analysis indicate that with the increase of the eccentric loading degree, the dynamic responses of the bridge increase on the whole, in which some of the individual indices may have certain fluctuation and randomness and with the increase of the vehicle spacing distance, the dynamic responses of the bridge decreases in general. ©, 2014, Wuhan Bridge Research Institute. All right reserved.
Shen Y.-G.,Kunming University of Science and Technology |
Guo Y.-B.,Sippr Engineering Group Co. |
Li W.-D.,Kunming University of Science and Technology
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | Year: 2014
Engine combustion and emissions characteristics were investigated on a single cylinder SI engine with variable compression ratio at different EGR rates (0-20%) and different compression ratios (8-11). Results show that, with the increase of EGR rate, ignition delay and combustion duration increase and the instantaneous peak heat release rate decreases and moves to later phase, consequently resulting in lower maximum cylinder pressure and combustion temperature. Ignition delay and combustion duration decrease with the increase of compression ratios, along with the increase in cylinder pressure and combustion temperature. NOx emissions reduce substantially with the increase of EGR rate. NOx reduction by 92% is achieved at 20% EGR rate at the compression ratio of 9. The emissions of CO and HC do not change significantly at low EGR rate, but decrease at high compression ratio. CO and HC reduced by maximum 7.8% and 27% respectively at EGR rate of 5%.
Liu Y.,China University of Petroleum - East China |
Li F.,Sippr Engineering Group Co. |
Gong W.,Sinopec |
Li Z.,China University of Petroleum - East China
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013
Changes in human expression cause non-rigid deformation of face models, this is a great challenge for 3D Face Recognition. To tackle this problem, there has been lots of excellent research work in recent years. In this paper, we propose a face recognition algorithm based on intrinsic features. Firstly face models are preprocessed and adjusted to standard pose for extracting nose tip, then we compute several geodesic stripes based on detected nose tip, make sampling in each stripe, and extract isometric-invariant features on each feature point. Because facial expression makes different levels of impact on different parts of face surface, we use SVM to train the matching results between stripes, getting optimal weight for each stripe. Finally, similarities are computed by weighed sum of different stripes matching results. Our experiments use the Gavab Database and the results are better than other 3D face recognition algorithms such as MDS method, showing effectiveness of our method. © Springer International Publishing 2013.
Liu L.,Henan Institute of Engineering |
Li B.,Sippr Engineering Group Co.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2015
The continuous heat treatment production line was designed according to the technical requirements of crankshaft. The heat treatment process, composition and control mode of the production line were described, and the process, heating furnace, cooling chamber and automatic control of the line were also introduced. Through field operation, it shows that the production line plays a significant role for energy saving and production efficiency improvement. © 2015, Chinese Mechanical Engineering Society of Heat Treatment. All right reserved.