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It is described the realization of a single sided scanner suitable for Nuclear Magnetic Resonance (NMR). A new design of a hand-size elliptical magnet, coil system and electronics is presented. First results demonstrate the possibility to measure relaxation times and diffusion coefficient in a small volume and open the possibility to use the prototype for in vivo skin studies. Possibility to extend...
1H NMR spectroscopy was utilized to distinguish the brands of rapeseed oils. As there are more than four hundreds of NMR variables, uninformative variables should be eliminated to improve model's discrimination ability and save the calculation time. A hybrid variable selection which is combined with uninformation variable elimination (UVE) and successive projections algorithm (SPA), was used to achieve...
An improved method for allowing a NMR magnet to meet its field homogeneity requirements has been developed. Using the adjoint variable method, topology design sensitivity is derived analytically. Coupled with continuum topology sensitivity analysis, steep descent method is employed to find an optimized distribution of the shimming block of iron for the permanent magnets NMR. Different free induction...
The measure technology of low-field pulsed NMR (nuclear magnetic resonance) is a new technology, which has great potential development. It can be widely used in industry and agriculture for product detection as a lossless method. The most important work of NMR measurement is the multi-exponential inversion of NMR signal based on the peak information. But the signal is interfused by noise during the...
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