2-{[4-(1,3-Benzothia­zol-2-yl)phen­yl](meth­yl)amino}acetic acid

In the title compound, C16H14N2O2S, the dihedral angle between the benzothia­zole ring system and benzene ring is 3.11 (2)°. In the crystal structure, inter­molecular O—H⋯N hydrogen bonds link mol­ecules into chains along [100] and these chains are, in turn, linked into a three-dimensional network via weak inter­molecular C—H⋯O hydrogen bonds

Experimental implementation of fully controlled dephasing dynamics and synthetic spectral densities

Engineering, controlling, and simulating quantum dynamics is a strenuous task. However, these techniques are crucial to develop quantum technologies, preserve quantum properties, and engineer decoherence. Earlier results have demonstrated reservoir engineering, construction of a quantum simulator for Markovian open systems, and controlled transition from Markovian to non-Markovian regime. Dephasing is an ubiquitous mechanism to degrade the performance of quantum computers. However, a fully controllable all-purpose quantum simulator for generic dephasing is still missing. Here we demonstrate full experimental control of dephasing allowing us to implement arbitrary decoherence dynamics of a qubit. As examples, we use a photon to simulate the dynamics of a qubit coupled to an Ising chain in a transverse field and also demonstrate a simulation of non-positive dynamical map. Our platform opens the possibility to simulate dephasing of any physical system and study fundamental questions on open quantum systems.Comment: V2: Added some text and new figur

Ethyl 2-[4-(1,3-benzothiazol-2-yl)­anilino]acetate

In the title compound, C17H16N2O2S, the dihedral angle between the benzothia­zole ring system and the benzene ring is 1.20 (2)°. The substituted amino substituent is in an extended conformation with an N—C—C—O torsion angle of 179.4 (3)°. In the crystal structure, pairs of mol­ecules are connected by inter­molecular N—H⋯O and weak C—H⋯O hydrogen bonds, forming centrosymmetric dimers

An Improved Combined Current Control for Single-Phase Operation Mode of Single-/Three-Phase EV Charging System with Voltage Ripple Suppression

In this article, the control stage of an interesting versatile single-/three-phase electric vehicle (EV) charging system is studied in details. Therein, a typical three-phase two-level voltage source rectifier can be reconfigured to operate as a single-phase rectifier where two phase-legs operate with a pulsewidth modulation interleaving method and the grid neutral is connected to the midpoint of the dc-bus capacitors with the third leg operating as an active power decoupling (APD) circuit to reduce the current stress in the capacitors. To improve the performance of the single-phase operation while considering external grid voltage disturbances, first, an improved hybrid current control method combining deadbeat prediction current control (DPCC) with repetitive control (RC) is proposed in this article, where a modified RC is adopted to suppress the influence of the internal dc-bus capacitor voltage disturbance and to improve the harmonic control performance. Thereafter, via introducing the weighting factor Kf of the DPCC and by multiplexing the filter of RC in the DPCC output, the stability of the current loop under the influence of grid voltage distortion and grid impedance can be improved remarkably. Moreover, a grid-frequency voltage ripple suppression function implementing zero-voltage-switching turn-on for the APD circuit is achieved, improving the reliability of the converter. Finally, a 7.4-kW single-phase ac-dc converter prototype is built to verify the feasibility and effectiveness of the proposed method in the single-/three-phase EV charging system.</p

Design of Sail-Assisted Unmanned Surface Vehicle Intelligent Control System

To achieve the wind sail-assisted function of the unmanned surface vehicle (USV), this work focuses on the design problems of the sail-assisted USV intelligent control systems (SUICS) and illustrates the implementation process of the SUICS. The SUICS consists of the communication system, the sensor system, the PC platform, and the lower machine platform. To make full use of the wind energy, in the SUICS, we propose the sail angle of attack automatic adjustment (Sail_4A) algorithm and present the realization flow for each subsystem of the SUICS. By using the test boat, the design and implementation of the SUICS are fulfilled systematically. Experiments verify the performance and effectiveness of our SUICS. The SUICS enhances the intelligent utility of sustainable wind energy for the sail-assisted USV significantly and plays a vital role in shipping energy-saving emission reduction requirements issued by International Maritime Organization (IMO)