Culturomics was recently introduced as the application of high-throughput data collection and analysis to study human culture. Here, we make use these by investigating fluctuations in yearly usage frequencies specific words that describe social natural phenomena, derived from books were published over course past two centuries. We show determination Hurst parameter means fractal provides fundamental insights into nature long-range correlations contained culturomic trajectories, doing so...

Abstract To explore the effect of carbon fiber (CF) backplate thickness on ballistic performance Al/CF plate, projectile impact test and numerical simulation were conducted for damage evolution resistance composite plate. The penetration velocity, deformation, failure morphologies examined by high‐speed photography, digital image correlation (DIC), computed tomography (CT). results show that CF plate mechanical support Al increases nonlinearly, energy absorption does not significantly...

Current research on soil–structure interface properties mainly focuses sand, clay, and silt, with little attention given to sandy gravel. In order study the effects of relative density materials shear behavior gravel–structure interface, a series large-scale direct tests gravel were carried out, stress–strain relationships, volume change curves, strengths investigated. The results show that angle internal friction increases linearly (R2 is 0.998), from 43.0° 48.0° when 0.3 0.9. growth trend...

With the continuous development and use of renewable energy, photovoltaic projects have become essential in clean energy landscape. The bearing capacity stability their bracket foundations are crucial for sustainable energy. Therefore, this paper aims to investigate application bionics principles propose a novel type pile foundation designed meet diverse requirements, specifically suited desert gravel areas: serpentine foundation. This study examine factors influencing characteristics piles....

In recent years, the advancement of photovoltaic power generation technology has led to a surge in construction stations desert gravel areas. However, traditional equal cross-section bracket pile foundations require improvements adapt unique challenges these environments. This paper introduces new type foundation named “serpentine foundation” based on principle biomimicry. Utilizing experimental data, numerical simulation was employed comprehensively investigate pullout resistance,...

Misbehaving nodes, including malicious and selfish ones, will disturb the cooperation among all wireless nodes in a mobile ad hoc network (MANET). Overhearing reputation based schemes have been used to detect isolate misbehaving as well force them cooperate. These worked previous publications. However, this paper, we propose an on/off strategy that fool current overhearing downgrade performance of network. All simulation results are on OCEAN protocol which works with non-secondhand system....

Health monitoring of world economy is an important issue, especially in a time profound economic difficulty world-wide. The most aspect health to accurately predict downturns. To gain insights into how crises develop, we present two metrics, positive and negative income entropy distribution analysis, analyze the collective "spatial" temporal dynamics companies nine sectors over 19 year period from 1990–2008. These metrics provide accurate predictive skill with very low false-positive rate...

The primary user (PU)'s busy/idle behavior in a cognitive radio network is conventionally modeled using two-state Markov chain. Maximum likelihood (ML) estimation widely applied to estimate the state transition probabilities. This letter derives precise expression of probability mass function (PMF) for ML estimator, which has not been reported literature. By leveraging exact PMF expression, essential relation among number samples, probabilities, and accuracy revealed.

This paper proposes a Deadline Based Resource Balancing (DBRB) task allocation algorithm for heterogeneous LEO small satellite networks, in which each is equipped with one or more resources and limited power. So the process, dispatcher needs to consider deadlines of tasks as well balance different resources. As Map-Reduce program model broadly adopted, this network can consists multiple subtasks. schedules subtasks based on both deadline resource balance. The DBRB deployed head node cluster....

Modeling and estimating the primary user (PU) behavior is critical to implement dynamic spectrum access in cognitive radio networks. In this paper, we investigate estimation accuracy of PU based on Markov model. Maximum Likelihood (ML) employed estimate transition probabilities model sample sequence idle/busy states. An approximate distribution ML estimator derived evaluate specified by confidence level. To meet requirement while reducing unnecessary sensing time, propose a learning...

Due to the size and density of small satellite networks (SSNs), traditional clustering algorithms large monolithic are often limited. This paper proposes a novel distributed weight-based dominating set algorithm address problems in stochastically deployed SSNs. Considering unique features satellites, this is able form clusters efficiently stably. In algorithm, satellites separated into different groups according their spatial characteristics. Firstly, minimum chosen as candidate cluster head...

The blast loading direction and in-situ stress field have an effect on the destruction process in surrounding rock around tunnel. Five blasting directions are considered experiment simulation. static distribution by confining pressure superposition waves discussed simulation LS-DYNA. Results indicated that hoop accelerates radial cracks growing, damage hole is not influenced direction. wave failure along tunnel affected of prestress symmetrical under uniform (k = 1) decelerates crack...

We present an investigation of the temporal correlation time-energy entangled photon pairs propagating through multi-frequency-channel dispersive media, in which spectra spread over multiple discrete frequency channels with dispersions. have observed more complex coincidence structures including double envelopes and dependence on detuning that are absent single-channel case. Our results photonic entanglement media channel divisions would impact fields quantum metrology communication.

We have observed that temporally-correlated photon pairs, experiencing multi-frequency-channel, opposite dispersion, yield double coincidence peaks. present and compare theoretical experimental results.

The physical condition and durability of cement-based structures decrease easily after years operation due to exposure severe scenarios associated with internal defects, aggressive usage, continuous load changes. Therefore, accurately assessing such infrastructures is essential ensure safety serviceability prevent hazards. In this study, an experimental investigation the multimodal failure characteristics cement different sand contents under uniaxial compressive loading rates was conducted....

Supporting real-time transmission in a cognitive radio network has been hot research topic recent years. However, most previous works only considered packets the rather than co-existence of and non-realtime traffic. For considering traffic, usually absolute priority is given to that QoS ones cannot be guaranteed. In this paper, we propose dynamic spectrum allocation scheme based on Earliest Deadline First (EDF) scheduling mechanism preserve both kinds traffic cellular networks. Simulation...