Entity

Time filter

Source Type


Ma G.J.,Gansu Normal University for Nationalities
Advanced Materials Research | Year: 2014

This paper describes the design idea of yak farming hardware of remote image acquisition system, from the camera communication circuit, wireless communication circuit, power supply circuit for yak farms node wireless remote image acquisition, transmission system hardware design. © (2014) Trans Tech Publications, Switzerland.


Fu Y.-H.,Gansu Normal University for Nationalities
Gaodeng Xuexiao Huaxue Xuebao/Chemical Journal of Chinese Universities | Year: 2012

During the past years, the interest in complexes of transition metals with organophosphorus ligands has been growing considerably in the light of their versatile applications in coordination chemistry and homogenerous catalysis. The palladium system has good prospects in the catalytic application. Particularly for a lack of selectivity under classic conditions or for base sensitivity of the functional groups, transition metal catalysis under mild and neutral conditions offers a promising and superior alternative. A (1, 2-diaryl)vinylphosphine ligand has one aryl group at the α-position and one aryl group at the β-position, respectively. The ligand more steric hindrance and electron-richness around the phosphorus atom was synthesized. Complex of palladium-(1, 2-diaryl)vinylphosphine as a catalyst shows highly catalytic activity in Sonograshira cross coupling reaction.


Li Y.G.,Gansu Normal University for Nationalities
Applied Mechanics and Materials | Year: 2013

In this paper, according to the characteristics and influence factors of the distribution logistics and distribution center problem, a mathematical model of the distribution center of the LRTWP (Location and Routing with Time Window Problem) was established. An improved bat algorithm was used to solve the model, the parameter and selection operator in the algorithm is set reasonably. Simulations and results indicate that the improved bat algorithm has better feasibility and validity for solving the LRTWP. © (2013) Trans Tech Publications, Switzerland.


Ma G.J.,Gansu Normal University for Nationalities
Advanced Materials Research | Year: 2014

In view of the Gannan Tibetan yak breeding situation, proposed the Gannan yak disease early warning system based on Internet of things technology, from the model base management, information management, assessment prediction of disease, disease alarm four aspects of the design of the system framework. © (2014) Trans Tech Publications, Switzerland.


Li Y.G.,Gansu Normal University for Nationalities
Applied Mechanics and Materials | Year: 2013

In this paper, according to the characteristics and influence factors of the distribution logistics and distribution center problem, a mathematical model of the distribution center of the LRTWP (Location and Routing with Time Window Problem) was established. An improved simulated annealing algorithm was used to solve the model, the parameter and selection operator in the algorithm is setted reasonably. Simulations and results indicate that the improved simulated annealing algorithm has better feasibility and validity for solving the LRTWP. © (2013) Trans Tech Publications, Switzerland.

Discover hidden collaborations