We show that for observing high-resolution heteronuclear NMR spectra of anisotropically mobile systems with order parameters less than 0.25, moderate magic-angle spinning (MAS) rates of approximately 11kHz combined with (1)H decoupling at 1-2kHz are sufficient. Broadband decoupling at this low (1)H nutation frequency is achieved by composite pulse sequences such as WALTZ-16. We demonstrate this...

Purpose—In a coupled parallel transmit (pTx) array, the power delivered to a channel is partially distributed to other channels because of coupling. This power is dissipated in circulators resulting in a significant reduction in power efficiency. In this paper, a technique for designing robust decoupling matrices interfaced between the RF amplifiers and the coils is proposed. The decoupling mat...

Economic development usually leads to increased energy consumption, which in turn will result in an increase in carbon emissions. To break the relationship between economic development and carbon emissions, scholars have turned their attention to the phenomenon of decoupling. In this paper, we studied the decoupling relationship between carbon emissions and economic growth of the equipment manu...

The use of a low-power two-pulse phase modulation (TPPM) sequence is proposed for efficient (1)H radio frequency (rf) decoupling in high-resolution (13)C solid-state NMR (SSNMR) under fast MAS conditions. Decoupling efficiency for different low-power decoupling sequences such as continuous-wave (cw), TPPM, XiX, and π-pulse (PIPS) train decoupling has been investigated at a spinning speed of 40 ...

UNLABELLED The linear correlation between (11)C-methionine PET and tumor cell density is not well conserved at the tumor border in glioma. A novel imaging analysis method, voxelwise (18)F-FDG-(11)C-methionine PET decoupling analysis (decoupling score), was evaluated to determine whether it could be used to quantitatively assess glioma cell infiltration in MRI-nonenhancing T2 hyperintense lesion...

The task of decoupling, i.e., removing unwanted internal couplings of a quantum system and its couplings to an environment, plays an important role in quantum control theory. There are many efficient decoupling schemes based on combinatorial concepts such as orthogonal arrays, difference schemes, and Hadamard matrices. So far these combinatorial decoupling schemes have relied on the ability to ...

The purpose of decoupling capacitors on printed circuit boards is to meet the instantaneous current demands of high-speed active devices while minimizing power bus noise. Embedded capacitance is an alternative to discrete decoupling capacitors and is achieved by taking advantage of the natural capacitance between the power and ground planes. This paper investigates the electrical properties of ...

The question of decoupling and freeze-out is revisited. Starting from an exact manybody expression transparent semi-classical decoupling formulae are microscopically derived which provide a smooth decoupling in time both, for single and two particle inclusive spectra. They generalise frequently employed instantaneous freeze-out procedures and provide simple relations between the damping width a...

This paper reports the reduction of package-stresses by in tm ducing a decoupling zone directly m u n d a sensor structure. Different geometries of the decoupling zones are compared, using the Fdte Element Method (FEM) and analytical models. A large reduction is obtained in case of a corrugated decoupling zone. To optimize the reduction, an analytical description of a ring-shaped V-groove is gi...

Methods to ensure signal integrity using decoupling capacitors have been the topic of many papers in the past as well as in the present. One can find equally many methods of decoupling as well. This paper will illustrate one of these established methods and introduce it in a theoretical sense using the most simplistic of terms. The paper will also describe the methods of the past (in slow speed...