This study presents a visible‐light‐mediated three‐component radical reaction involving alcohols or alkanes and in situ‐formed imines. The imines, generated from aldehydes amines, serve as key reactants, while the inexpensive readily available sodium decatungstate (NaDT) is employed photocatalyst. strategy enables functionalization of industrially accessible to synthesize β‐amino via an intermolecular hydrogen atom transfer (HAT) mechanism under visible‐light irradiation. operationally...

Abstract The flow patterns formed by the electrohydrodynamic effect of nematic liquid crystal are observed. It is found that phase diagram made from observation bears a strong resemblance to isotropic fluid. typical observed under variable frequency and voltage shown.

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We show experimentally that for the electrohydrodynamic instability in nematic liquid crystals threshold onset of spatial turbulence can be increased by at least a factor 2 superimposing noise on applied voltage. find sufficiently high intensities direct transition from spatially homogeneous state to via intermittency induced.

Task assignment is a challenging problem in multiple unmanned aerial vehicle (UAV) missions. In this paper, we focus on the task for UAV swarm saturation attack, which deep reinforcement learning (DRL) framework developed. Specifically, first construct mathematical model to formulate attack and consider it as Markov Decision Process (MDP). We then design policy neural network using attention mechanism. also propose training algorithm based gradient method so that our agent can learn an...

Strongly promoted by the development of Service-Oriented Computing and Cloud technologies, a large number functionally equivalent web services emerge on Internet. Quality Service (QoS) is becoming key factor to distinguish different services. Although many Collaborative Fi ltering (CF) based approaches are recently proposed predict QoS services, prediction accuracy not satisfactory, since they rarely take full use neighbor information latent feature contained in historical data. Especially...

In this paper, we propose a distributed multi-agent reinforcement learning (MARL) method to learn cooperative searching and tracking policies for multiple unmanned aerial vehicles (UAVs) with limited sensing range communication ability. Firstly, describe the system model multi-UAV moving targets consider average observation rate exploration as metrics. Moreover, information update fusion mechanisms enhance environment perception ability of system. Then, details our are demonstrated,...

We report the stability diagram experimentally obtained for periodic roll structures in electrohydrodynamic convection of nematics. The is composed three types long-wavelength instabilities, Eckhaus, zig-zag and skewed varicose instabilities. After characteristic transients these instabilities lead to stable normal-roll states or time-dependent modulated structures. find that among most important one relation route defect turbulence.

Current Internet performs traffic engineering (TE) by estimating matrices on a regular schedule, and allocating flows based upon weights computed from these matrices. This means the allocation is guess of in network its history. Information-Centric Networks other hand provide finer-grained description traffic: content between client server uniquely identified name, can therefore learn size different items, perform resource accordingly. We claim that better handle to engineering, resulting...

This paper presents the design and evaluation of clean-slate transport layer protocols for MobilityFirst (MF) future Internet architecture based on concept named objects. The MF is a specific realization emerging class Information Centric Networks (ICN) that are designed to support new modes communication names information objects rather than their network addresses or locators. ICN architectures including characterized by following distinctive features: (a) use identify sources sinks...

The performance of shielding materials directly affects the radiation protection effect and plays a very important role in process ensuring safety nuclear energy. Therefore, this paper introduces evaluation composite materials, which firstly points out disadvantages traditional TOPSIS method, proposes weighted projection model under extended theory, clarifies principle dimensional reduction algorithm implementation. Secondly, also basic assumption non-linear mapping relationship between...

We investigate wavelength competition in two-dimensional pattern-forming systems with uniaxial anisotropy. A spatially periodic modulation of the external driving force leads to an interplay wave length convection rolls which is similar competing interactions between two equilibrium lattice constants adsorption problems. For a class anisotropic we find new types stable patterns are induced by such competition. These skewed varicose pattern, undulatory pattern and incommensurate pattern. Each...

In the past decade, remarkable progress has been made in area of network coding terms theory, code design, and applications. However, from a cross-layer perspective, there have fewer efforts on understanding impact lower layers packets at layer to improve throughput. this paper, we study design power control that can enhance performance random wireless networks. Specifically, utilize differential equation based framework analyze throughput, dynamic algorithm achieve higher multicast

A power source–power grid coordinated typhoon defense strategy is proposed in this study to minimize the cost of anti-typhoon reinforcement measures and improve efficiency. It based on multiagent dynamic game theory. This regards a as rational gamer that always causes greatest damage. Together with planner black start unit (BSU) planner, it forms defense–attack–defense model naturally. The adopted determine optimal reinforcements for transmission lines, capacity, location. Typhoon Hato,...

A novel fuzzy proportional–integral (PI) control with fault ride-through (FRT) capability is investigated for double fed induction generators (DFIGs), where an approximation error considered Takagi–Sugeno observer employed to approximate the non-linear model of DFIG. Based on obtained observer, a H2 controller PI structure used achieve specified engineering purposes, such as maximum power point tracking and automatic voltage regulator. H∞ proposed cope undetected disturbances in control,...

Abstract This paper introduces a user-centered design method in software engineering practice. can develop more effectively based on the results of UCD, and make these be tracked tested future. Another feature this is to UCD as schedulable manageable other development activities. requirement analysis framework three types usability requirements, which reflect activities development. These requirements come from description ISO 13407 model.