Lithium–sulfur (Li–S) batteries are promising energy storage systems owing to their high theoretical density and low costs due the abundant reserves of sulfur.

Grouted splice sleeve (GSS) connectors are mainly used in precast concrete structures. However, errors manual operation during construction cause grouted defects the GSS connector, which can lead to a negative effect on overall mechanical properties of Owing complex structure members with it is difficult detect effectively using traditional ultrasonic parameters. In this paper, wavelet packet analysis algorithm was developed method, and verified experiment carried out. Laboratory detection...

Time-delays of control force calculation, data acquisition, and actuator response will degrade the performance Active Mass Damper (AMD) systems. To reduce influence, model reduction method is used to deal with original controlled structure. However, during procedure, related hierarchy information small eigenvalues be directly discorded. As a result, reduced-order ignores high-order mode, which design accuracy an AMD system. In this paper, new controller based on improved Balanced Truncation...

A control-structure interaction (CSI) effect commonly exists between an active mass damper/driver (AMD) system with a DC motor and controlled building. Additionally, its higher-order component leads to the fact that actual control force acts behind theoretical time; i.e., time delay. In this paper, main influencing factors of CSI are analyzed, including input frequency voltage, structural parametric uncertainties, gains. addition, new time-delay compensation controller based on guaranteed...

Summary As the auxiliary mass of an active damper/driver (AMD) control system in a high‐rise building has excessive strokes and its relative velocities are same direction with strokes, probably collides anti‐collision device. result, structural responses increase even safety is endangered. In this paper, variable gain state‐feedback proposed to limit mass, so as ensure system. Firstly, limited state defined, regional pole assignment algorithm that utilizes only damping factor realized gain....

The photoassociation (PA) reactions of H + F → HF and D DF are investigated by using the time-dependent quantum wave packet method. For each system, we consider four cases, where target state is set to be ∣ν = 16, 17, 18, 19〉, respectively. effects initial collision momentum laser parameters, including intensity, pulse duration, frequency, on final association probability calculated discussed. It found that PA for (∣ν 18〉) significantly greater than 18〉), while 19〉 latter system former one....

Summary An active mass damper/driver (AMD) control system with a single has such problems as the excessive weight of auxiliary and insufficient capacity its driving equipment. It is necessary to work through multiple subsystems achieve effective high‐rise buildings. However, time‐delay effect in each subsystem impedes application engineering practices. In paper, an augmented based on zero‐order hold proposed for discrete‐time systems time delays, then designed according compensation strategy...

5-amino-tetrazolo[1,5-a]pyrimidin-7-ol (I) was synthesized by reaction of 5-amino-tetrazole with ethyl cyanoacetate in excellent yield. A series novel 5-amino-6-arylazotetrazolo[1,5-a]pyrimidin-7-ol dyes were prepared linking o-, m-, p-anisidine, p-chloroaniline, p-nitroaniline, p-toluidine and aniline to (I). The structure these confirmed UV-vis, FTIR 1H NMR spectroscopic techniques elemental analysis. effect varying pH solvent upon the absorption ability sudstituted electron-withdrawing...

Active mass damper (AMD) control system is proposed for high-rise buildings to resist a strong wind. However, negative influence of noise in sensors impedes the application AMD systems practice. To reduce adverse on systems, Kalman filter and linear matrix inequality- (LMI-) based are designed. Firstly, ten-year return period fluctuating wind load simulated by mixed autoregressive-moving average (MARMA) method, its reliability tested speed power spectrum correlation analysis. Secondly,...

High‐rise buildings with an active mass damper/driver (AMD) system generally use a simplified mathematical model. The result leads to parametric uncertainties including the stiffness and variations exist, accuracy of its controller is seriously affected. In view above uncertainties, based on Lyapunov stability theory linear matrix inequality (LMI) approach, state feedback guaranteed cost control (GCC) algorithm proposed in this paper. A ten‐storey frame AMD taken as numerical example, effect...

Collisions between a moving mass and an anti-collision device increase structural responses threaten safety. An active damper (AMD) with stroke limitations is often used to avoid collisions. However, stroke-limited AMD control system fixed limited area shortens the available leads significant power. To solve this problem, design approach variable gain (VGLA) proposed in study. First, boundary of variable-limited areas calculated based on real-time status mass. The (VG) expression at deduced...

Since failures in sensors will degrade the performance of Active Mass Damper (AMD) control systems, a dynamic filter design method, state observer and robust control strategy are developed presented this paper to overcome deficiency. The method be transformed into H2/H∞ problem that can be solved by Linear Matrix Inequality (LMI) approach. Thus, it used perform fault detection isolation (FDI) for systems. And, state observer uses acceleration responses as feedback signal. detected...

An AMD control system is usually built based on the original model of a target building. As result, fact leads large calculation workload exists. Therefore, orders structural should be reduced appropriately. Among various model-reduction methods, suitable reduced-order important to high-rise buildings. Meanwhile, partial information discarded directly in process, which accuracy reduction its controller design. In this paper, an optimal technique selected through comparing several common...