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Square‐planar bis(σ‐fluorophenylacetylide) platinum(II) complexes [Pt(Me3SiCCbpyCC‐SiMe3)(CCC6H4F)2] (CCC6H4F‐2 for 2, CCC6H4F‐3 for 3, and CCC6H4F‐4 for 4; Me3SiCCbpyCCSiMe3=5,5′‐bis(trimethylsilylethynyl)‐2,2′‐bipyridine) were prepared and were characterized by spectroscopic and luminescence studies, and X‐ray crystallography. The color and luminescence of crystalline complex 3 is specifically...
The technique is established for performance-analysis and inner failure location of three-dimensional braided composites, which is based on the wave transmission of the acoustic emission and the equation of time location method. We have a few of failure three-dimensional braided composites which is seemed a crack on the material obviously. The crack is formed by the break yarn when the material are...
As BLDCM position sensor has the shortcomings of size, cost and the manufacturing technology, in this paper, electrodes winding back EMF signal detecting the back EMF zero point is used to acquire the motor rotor signal. The BLDCM position sensor control strategies is analyzed, low-power controller has been developed by using chip ML4425, in order to improve the current volatile problem under the...
Control system of elevator door is a typical motor servo system, elevator door switch is the implementing agency. With the rapid development of the national economy, modern buildings is increasing, elevator is becoming an indispensable tool in daily life. Elevator normal operation is relation to personal safety, therefore, the elevator door not only demand the switch of action reliable and accurate,...
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