Abstract Pulse-Position Modulation (PPM) is a modulation method that only makes every pulse in the carrier sequence change with time but without changing shape and amplitude of signal. In this paper, PPM system designed. Firstly, an appropriate mathematical model established to represent transmission, signal After that, we write code add white Gaussian noise channel. Then transmission process s...

Machine Learning finds application in the quantum control and readout of qubits. In this work we apply Artificial Neural Networks to assist manipulation a prototypical molecular spin qubit - an Oxovanadium(IV) moiety two experiments designed test amplitude phase recognition, respectively. We first successfully use artificial network analyze output Storage/Retrieval protocol with four input puls...

near-fault ground motions with long-period pulses can place severe demands on structures near an active fault. these pulse-type ground motions can be represented by pulse sequences with simple shapes. half-sinusoidal pulse sequences are used to approximate recorded ground motions and dynamic responses of sdof system under the excitation of these pulse sequences are studied. four cases are consi...

BACKGROUND MRI physics simulators have been developed in the past for optimizing imaging protocols and for training purposes. However, these simulators have only addressed motion within a limited scope. The purpose of this study was the incorporation of realistic motion, such as cardiac motion, respiratory motion and flow, within MRI simulations in a high performance multi-GPU environment. ME...

We consider a phaselocked two-pulse sequence applied to photofragmentation in the weak-field limit. The two pulses are not overlapping in time, i.e., the energy of the pulse-train is constant for all time delays. It is shown that the relative yield of excited Br (*) in the nonadiabatic process: I + Br* ← IBr → I + Br, changes as a function of time delay when the two excited wave packets interfe...

The basic idea of parallel imaging is to reduce the number of acquisition steps (i.e. phase-encoding steps) by decreasing the sampling density in kspace. Artefacts, in particular aliasing artefacts, that would result from the reduced sampling density are compensated by employing image data from several independent coil elements with different spatial sensitivity profi les for reconstruction. Th...

We study the pulse control of decoherence in a qubit focusing on the general case where qubit-environment interactions induce decoherence with population decay as well as pure dephasing. We examine how the decoherence is suppressed by pulse sequences of bitand/or phase-flips. To do so, we present a method to calculate the time evolution of a qubit under such pulse sequences. We show that the pu...

A theoretical study is performed to understand the accuracy and repeatability of multiple pulse sequences in quantifying glutamine concentration at 3T. Variable repeatability (12% to >50%) and significant bias (-30% to +70%) is noted for the seven pulse sequences considered. Data acquired in vivo using three of the pulse sequences used for simulations matches the predicted repeatability well. F...

Surface coils for exciting and detecting NMR signals are often used in place of the traditional solenoid or Helmholtz coils in situations where only a small region of a large sample is of interest (I). In particular, this is the situation in many in vivo studies (1-5). Typically, it is desirable to observe signals from a single organ without interference from the surrounding tissue. The degree ...

Treatment and diagnosis can be made in difficult areas simply by changing the output pulse form of the magnetic stimulation device. However, there is a limitation in the range of treatments and diagnoses of a conventional sinusoidal stimulation treatment pulse because the intensity, width, and form of the pulse must be changed according to the lesion type. This paper reports a multidischarge me...