In this paper we analyze the behavior of communication networks in which packets are generated dynamically at nodes and routed discrete time steps across edges. We focus on a basic adversarial model packet generation path determination for time-averaged injection rate requiring use any edge is limited to be less than 1. A crucial issue that arises such setting stability-will number system remain bounded, as runs an arbitrarily long period time? Among other things, show: (i) There exist...

The flexoelectric field generated by the strain gradient possesses capability to modify and manipulate various material characteristics. However, achieving abundant tunable gradients in thin films remains a formidable challenge. In this study, we successfully transferred SrRuO3 (SRO) free-standing single-crystalline onto flexible PDMS substrate using water-soluble sacrificial layer. By applying prestrain substrate, film exhibited modifiable one-dimensional (1D) wrinkled structure. Through...

Underwater acoustic sensor networks (UASNs) play an increasingly crucial role in both civilian and military fields. However, existing routing protocols primarily rely on node position information for forwarding decisions, neglecting link quality energy efficiency. To address these limitations, we propose a fuzzy logic reasoning adaptive (FLRAF) protocol three-dimensional (3D) UASNs. First, the FLRAF method redefines conical region to prioritize nodes with greater effective advance distance,...

In recent research of wireless communication, the concept cooperative diversity has been put forward and used widely. A number transmission schemes designed for radio communications could not be directly applied to underwater network, where channel characteristics are more complicated. this paper, we consider a situation comparatively closer realistic acoustic communication investigate relay selection problem. Considering long propagation delay caused by low speed sound, design scheme....

A simple method for dynamically adjusting the tap‐length adaptation step‐size of a variable linear equaliser based on fractional algorithm is presented. Simulations show that technique provides fast convergence and small steady‐state fluctuation.

Existing Data Center Network (DCN) architectures are classified into two categories: switch-centric and server-centric architectures. In DCNs, routing intelligence is placed on switches, each server usually uses only one port of the Interface Card (NIC) to connect network. switches used as cross-bars, servers, where multiple NIC ports may be used. this paper, we formally introduce a new category DCN architectures: dual-centric architectures, can both servers. We propose typical FSquare...

To overcome the problem caused by large propagation delays of underwater acoustic channel, an asynchronous decode-interleave-forward (UDIF) cooperative strategy is considered for communication system. The UDIF designed to realize transmission and decrease end-to-end delay. Aiming at strategy, a joint multi-branch combining turbo equalization detector proposed. compensate channel effects achieve diversity gain, equalization, multiuser detection, technique are jointly realized. In...

In this paper, a relay selection scheme for cooperative communication with amplify-and-forward (AF) under frequency selective channels is proposed. the scheme, to tackle difficulty caused by channel, output SNR of equalization detector used as end-to-end order relays. According ordering, one or multiple can be sequentially selected out from N The numerical results verify method ordering and show that outperforms conventional optimal single scheme.

Abstract The origin and phenomenology of Fast Radio Bursts (FRBs) remain unknown. efficient search technology for FRBs is critical triggering immediate multi-wavelength follow-up voltage data dump. This paper proposes a dispersed dynamic spectra (DDSS) pipeline FRB searching based on deep learning, which performs the directly from observational raw data, rather than relying generated candidates single-pulse algorithms that are de-dispersion. We train our learning network model using...

During optimize the weights of Elman recurrent neural networks by genetic algorithm, if use simple two problems appear: constringency too early and speed search slow in anaphase. Aim at these problems, an improved Niche algorithm is presented this paper. Simulation results show that can achieve perfect effect.

Abstract Aiming at the influence of underwater acoustic channel (UAC) profile difference on performance communication, a variable observation window length blind equalization detector (VOWL-BED) is proposed in this paper. Compared with existing methods, (OWL) VOWL-BED can be dynamically regulated basis given UAC and finally converge to optimum OWL. We have verified feasibility OWL regulation. The simulation results also demonstrate that achieve better than conventional invariable (IOWL-BED).

To suppress the effects of ultra-wideband receiver caused by non-Gaussian noise and difference channel profile, an adjustable observation window length equalisation based on H∞ criterion is proposed. In contrast to existing fixed (FOWL) receivers minimum mean square error (MMSE) criterion, proposed found can adaptively adjust according specific profile. The so designed shown outperform FOWL conventional MMSE in a environment.

In this letter, we propose an adjustable observation window length (OWL) multi-branch joint detector for amplify-and-forward (AF) cooperative communication under frequency selective channels and analyze its performance. contrast to the existing methods, proposed can adaptively adjust tap coefficient vector OWL of each branch according specific channel profile branch. Simulation results confirm analysis show advantages against counterparts.

Abstract Fast radio bursts (FRBs) are among the most studied transients in astrophysics, but their origin and radiation mechanism still unknown. It is a challenge to search for FRB events huge amount of observational data with high speed accuracy. With rapid advancement research process, searching has changed from archive mining either long-term monitoring repeating FRBs or all-sky surveys specialized equipments. Therefore, establishing highly efficient quality pipeline primary task...

In this study, a family of time‐invariant rate‐compatible (RC) low‐density parity‐check (LDPC) convolutional codes with algebraic construction is developed based on the graph‐extension method over given positive integer m , which considered as encoding memory. The base code first obtained by modifying LDPC code. Afterwards, authors derive other extended component successively adding extra information bits into particular, each in not only enables property fast that can dramatically reduce...

In this paper, an adjustable multiple relay selection (MRS) scheme for cooperative communication with amplify-and-forward (AF) under frequency selective channels is proposed. the proposed scheme, relays are ordered firstly by end-to-end SNR, then sequentially selected out from N and number of cooperating adjusted dynamically according to current channel state information. The aim work estimate optimum relays. `Optimum' means minimum achieving maximum level combined SNR. Numerical results...

On-chip many core architecture is an emerging and promising computation platform. High speed on-chip communication abundant chipped resources are two outstanding advantages of this architecture, which provide opportunity to implement efficient synchronization scheme. The practical execution efficiency scheme critical However, there few researches on systematic evaluation method choice schemes for processors, effect dedicated hardware support in context. So we focus the criterion Firstly,...

Abstract Fast radio bursts (FRBs) are transients that bright and have short duration, with their physical mechanism not being fully understood. We conducted a targeted search for from FRB 20201124A between 2021 June 2 July 20. High time-resolution data were collected 104.5 hr using the ROACH2-based digital backend. introduce details of our pipeline which is based on HEIMDALL FETCH. Testing injected mock FRBs could help us better understand performance pipelines, improve algorithms...