These approaches, which build on the original gradient ascent pulse engineering algorithm, remain computationally intensive because of the need to calculate matrix exponentials for each time step in the control pulse. In this study, we discuss how the propagators for each time step can be ...
In this work, we explore the potential of gradient ascent pulse engineering to design non-selective spin-echo refocusing pulses that simultaneously mitigate severe B1 and 螖B0 non-uniformities. The originality of the method lays in the optimization of the rotation matrices themselves as opposed to ...
1.the degree of inclination of a highway, railroad, etc., or the rate of ascent or descent of a stream or river. 2.an inclined surface; grade; ramp. 3. a.the rate of change with respect to distance of a variable quantity, as temperature or pressure, in the direction of maximum cha...
Then gradient ascent is used to take steps in the input space to synthesize inputs that cause the highest activation for this unit (gradient ascent is also used by Nguyen et al. [38] for the same purpose). The process stops when an optimal input is obtained that can maximally stimulate ...
Second order gradient ascent pulse engineering We report some improvements to the gradient ascent pulse engineering (GRAPE) algorithm for optimal control of spin ensembles and other quantum systems. The... PD Fouquieres,SG Schirmer,SJ Glaser,... - 《Journal of Magnetic Resonance》 被引量: 118发...
13.The steepness of the slope forbade ascent.坡度很陡,没法攀登。 14.They pitched the roof at a steep slant.他们以陡斜的角度定位屋顶。 15.marked by moderate steepness.以中等的陡峭程度为特点。 16.For once he was wrenched out of his wonted calm.这一次,他陡然失去了惯常的宁静态度。 17.Most...
Thus if χ > χw, the magnetic force acts in the direction of the steepest ascent of the energy density scalar field. If the magnetic field gradient must immobilize MNPs by capturing them from a flowing liquid, this force needs to overcome the hydrodynamic drag force acting on the magnetic ...
Through systematic quantitative and qualitative evaluation of the approach on videos with different levels of head motion, we compare the magnification of pulse and respiration to existing state-of-the-art methods. Our method produces magnified videos with substantially fewer artifacts and blurring whilst...
脉搏矩阵上升坡度工程设计算法设计控制信息处理器摘要:Gaurav BholeJonathan A. Jones物理学前沿:英文版G. Bhole and J. A. Jones, Practical pulse engineering: Gradient ascent without matrix exponentiation, Front. Phys. 13(3), 130312 (2018)
Design of non-selective refocusing pulses with phase-free rotation axis by gradient ascent pulse engineering algorithm in parallel transmission at 7T. J. Magn. Reson. 230, 76- 83.A. Massire, M. A. Cloos, A. Vignaud, D. Le Bihan, A. Amadon, and N. Boulant, "Design of non-...