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Search Results: 1 - 10 of 134727 matches for " Qiang Li "
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Online Finger Gesture Recognition Using Surface Electromyography Signals  [PDF]
Qiang Li, Bo Li
Journal of Signal and Information Processing (JSIP) , 2013, DOI: 10.4236/jsip.2013.42013

The analysis on the online finger gesture recognition using multi-channel sEMG signals was explored in this paper. Nine types of gestures were applied to be identified, involving six kinds of numerical finger gestures and three kinds of hand gestures. The time domain parameters were extracted to be the features. And then, the probabilistic neural network was utilized to classify the proposed gestures with the extracted features. The experimental results showed that most of gestures could acquire the acceptable classification performance and a few elaborate gestures were hard to acquire the effective identification.

A Safety Relay Selection Method Based on Network Coding  [PDF]
Qiang Guo, Xin Li
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2017, DOI: 10.4236/ijcns.2017.108B018
A method of cooperative relay selection based on network coding security is proposed for relay selection problem of cooperative communication system security in networked multi-relay scenarios, which is different from the existing relay node selection method. The algorithm not only merged with timestamp and homomorphic signature to construct the node degree of safety to find reliable relay, at the same time to considers the received signal to noise ratio at all relay nodes value and the channel gain to the source node. The simulation results show that the proposed method can improve the achievable rate of the destination node and reduce the outage probability on the basis of guaranteeing the safety of the relay node.
Non-Scattering of the Solution of the Nonlinear Schr?dinger Equation on the Torus  [PDF]
Xing Cheng, Qiang Li
Journal of Applied Mathematics and Physics (JAMP) , 2017, DOI: 10.4236/jamp.2017.59162
In this article, we will show non-scattering of the solution of the nonlinear Schrodinger equation on the torus. The result extends the result of Colliander, J., Keel, M., Staffilani, G., Takaoka, H. and Tao, T. for the cubic nonlinear Schr?dinger equation on 2-dimensional torus.
Current status and prospects of interventional pulmonology in China
Qiang LI
Medical Journal of Chinese People's Liberation Army , 2011,
Abstract: Interventional pulmonology is a newly developed medical discipline devoted to the performance of diagnosis and invasive therapy of respiratory diseases.The professional field of this discipline refers to diagnosis and staging of respiratory diseases,and focuses on treatment of pulmonary tumors,benign or malignant airway stenosis,pleural disease and pulmonary vascular diseases.So far,huge strides have been made in interventional pulmonology,and therefore some distinct features have been developed in China.Prevalent and common diseases,such as lung cancer,chronic obstructive pulmonary disease(COPD) and asthma,will hereafter be the foci of interventional pulmonary in China.
Technical Analysis on Mechanical Model Based Football Curveball
Qiang Li
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: Exercise load research that test heart rate of 13 athletes from the men's hockey team in Tianjin test who wear sun to Team Edition game state, the subjects in the game state in different time periods, different locations athletes, and high-strength heart rate load characteristics of the technical and tactical behavior. Research shows that, quantification of a hockey player in the first half, the second half of the game and the time period in which the total race time, pure competition time and intermittent time heart rate load index, as well as the game preparation and intermission non competition time heart rate load index. Through the comparison can know that the game time heart rate load significantly higher than playing time of heart rate load; Pure game heart rate load is obviously higher than that of the total playing time and intermittent playing time heart rate load; different position player heart rate are different , avant-garde athletes are the highest, the second highest defenders, forward players minimum; Quantify and analyze the behavior of high strength load game which game center is higher than 180 b/min.
Formation of ferromagnetic bulk amorphous Fe40Ni40P14B6 alloys
Qiang Li
Physics , 2006, DOI: 10.1016/j.matlet.2006.02.054
Abstract: Ferromagnetic bulk amorphous Fe40Ni40P14B6 alloy rods with a diameter of 1.2 mm can be prepared by means of a rapid quenching technique. If a fluxing technique is also used, amorphous rods with a diameter as large as 2.5 mm can be synthesized. The critical cooling rate Rc for the glass formation Fe40Ni40P14B6 is estimated to be on the order of 100 K.s-1
Critical cooling rate for the glass formation of ferromagnetic Fe40Ni40P14B6 alloy
Qiang Li
Physics , 2006,
Abstract: Bulk ferromagnetic amorphous Fe-Ni-P-B alloys in rod shape were formed by a rapid solidification technique. The largest amorphous specimen prepared had a diameter of ~2.5 mm and the corresponding cooling rate for the glass formation of this alloy system in our experiment can be estimate to be around 492.4 K/s by the method of finite-difference numerical calculation. This value is on the same order of magnitude as the critical cooling rate Rc of Fe40Ni40P14B6 alloy estimated by the method of constructing the continuous-cooling-transformation (CCT) curve. It is indicated that the heterophase impurities have been eliminated well in our experiment.
Compaction of bulk amorphous Fe40Ni40P14B6 alloys
Qiang Li
Physics , 2006,
Abstract: The consolidations of two bulk amorphous Fe40Ni40P14B6 alloy discs are performed via hot pressing for a short time in its supercooled liquid region under a pressure of ~1.2 GPa. When the consolidated temperature Ts is lower, the conjunction of two bulk amorphous Fe40Ni40P14B6 alloy discs cannot be achieved. Only when Ts get to the vicinity of 675 K, two amorphous Fe40Ni40P14B6 alloy discs have low viscosity enough to be fully fused together in a short time and the resulting compacts retain ~90% amorphous phase. To further improve the consolidated temperature Ts, a vast amount of crystallization will occur and result in the embrittlement of amorphous alloy.
Formation of bulk ferromagnetic nanostructured Fe40Ni40P14B6 alloys by metastable liquid spinodal decomposition
Qiang Li
Physics , 2007,
Abstract: Nanostructured Fe40Ni40P14B6 alloys ingots of diameter 3~5 mm could be synthesised by a metastable liquid state spinodal decomposition method. The molten Fe40Ni40P14B6 alloy was purified by means of the fluxing technique and thus a large undercooling could be achieved. For undercooling Delta T > 260 K, the microstructure of the undercooled specimen had exhibited liquid state spinodal decomposition in the undercooled liquid state. The microstructure could be described as two intertwining networks with small grains dispersed in them. For undercooling Delta T > 290 K, the overall microstructure of the specimen changed into a granular morphology. The average grain sizes of the small and large grains are ~ 30 nm and ~ 80 nm, respectively. These prepared samples are soft magnets with saturation magnetization Bs ~0.744 T.
Probability Analysis for the Damage of Gravity Dam  [PDF]
Qiang Xu, Jing Li, Jianyun Chen
Engineering (ENG) , 2011, DOI: 10.4236/eng.2011.34036
Abstract: Damage reliability analysis is an emerging field of structural engineering which is very significant in structures of great importance like arch dams, large concrete gravity dams etc. The research objective is to design and construct an improved method for damage reliability analysis for concrete gravity dam. Firstly, pseudo excitation method and Mazar damage model were used to analyze how to calculate damage expected value excited by random seismic loading and deterministic static load on the condition that initial elastic modulus was deterministic. Moreover, response surface method was improved from the aspects of the regression of sample points, the selection of experimental points, the determined method of weight matrix and the calculation method of checking point respectively. Then, the above method was used to analyze guarantee rate of damage expected value excited by random seismic loading and deterministic static load on the condition that initial elastic modulus was random. Finally, a test example was given to verify and analyze the convergence and stability of this method. Compared with other conventional algorithm, this method has some strong points: this algorithm has good convergence and stability and greatly enhances calculation efficiency and the storage efficiency. From what has been analyzed, we find that damage expected value is insensitive to the randomness of initial elastic modulus so we can neglect the randomness of initial elastic modulus in some extent when we calculate damage expected value.
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