Rotational Doppler effect is an important phenomenon during the detection by vortex electromagnetic wave carrying orbital angular momentum. Compared with traditional plane wave, rotational enables to detect spin motion along rotation axis of targets. However, there still are blind zones when integer momentum beams used specific spinning objects. To expand application scope scheme based on effec...

The spinnability of a spinning solution using DMSO as the solvent was investigated for dry-jet wet spinning of PAN precursor fiber. Among many variables responsible for spinnability, the coagulating conditions, the air gap length, the nonsolvent content in spinning solution, and the spinning temperature have been viewed as the key factors, and they were investigated in this study. It was found ...

Enhancement of sensitivity in solid state (15)N NMR by indirect detection through (1)H NMR signals under high-speed magic angle spinning and high-field conditions is demonstrated experimentally on two (15)N-labeled peptides, polycrystalline AlaGlyGly and the helix-forming, 17-residue peptide MB(i + 4)EK in lyophilized form. Sensitivity enhancement factors ranging from 2.0 to 3.2 are observed ex...

The problem of angular velocity stabilization for the spinning spacecraft is considered. The spacecraft is assumed to be supplied a passive inertial energy dissipater in the form of a spring-mass-dashpot and small resistojets. The satellite is subjected to a combination of an excitational time varying torque and a control torque. The energy-based speed-gradient (SG) control law is proposed and ...

The present study investigates the epicyclic pitching and yawing motion phenomenon of spinning symmetric projectiles applying the 6-DOF free flight dynamic simulation modelling for small-yaw flat-fire trajectories. The computational results are compared with the corresponding classical second order linear differential solution. The ammunition will be used is the .50 API M8 bullet tfiring from M...

The paper presents a method to guide the self-organised development of behaviours of autonomous robots. In earlier publications we demonstrated how to use the homeokinesis principle and dynamical systems theory to obtain self-organised playful but goal-free behaviour. Now we extend this framework by reinforcement signals. We validate the mechanisms with two experiment with a spherical robot. Th...