71,315 research outputs found
Simulation results of 3D ETS (Episodic Tremor and Slow-slip) asperity-in-matrix model using QDYN earthquake simulator
No full textThis data set contains simulation results of 3D ETS asperity-in-matrix model of Matlab .mat files for
Luo, Y., and Liu, Z. (2021) Fault Zone Heterogeneities Explain Depth-dependent Pattern and Evolution of Slow Earthquakes in Cascadia, Nature Communications.
It is generated by QDYN earthquake simulator (https://github.com/ydluo/qdyn Luo, Y., Ampuero, J. P., Galvez, P., Van den Ende, M., and Idini, B. (2017). QDYN: a Quasi-DYNamic earthquake simulator (v1. 1). Zenodo.(doi: 10.5281/zenodo. 322459).)
1. Uniform Model (10 years, dense output, Uniform_model/)
2. Binary (Bi-modular) Model (4 years, Binary_model/)
3. Linear Model (40 years, dense output, Linear_model/)
4. Comparison of asperity distributions (asp_patttern/):
4.1 (asp_patttern/tri/) - hexagon pattern asperity distribution
4.2 (asp_patttern/sqr/) - rectangular pattern asperity distribution
4.2 (asp_patttern/rnd/) - random asperity distribution
File format: (see details in documents of QDYN)
p - model settings
ot0, ot3d: timeseries outputs
ox0, ox3d: snapshot outputs<br
The Neutrophil/Lymphocyte Ratio Could Predict Noninvasive Mechanical Ventilation Failure in Patients with Acute Exacerbation of Chronic Obstructive Pulmonary Disease: A Retrospective Observational Study [Corrigendum]
No full textSun W, Luo Z, Jin J, Cao Z, Ma Y. Int J Chron Obstruct Pulmon Dis. 2021;16:2267–2277.
The authors have advised the author list on page 2267 is incorrect. The text “Yingmin Ma2” should read “Yingmin Ma1,2”.
The authors apologize for this error
Complete solution of the Diophantine equation
No full textsummary:The triples , , where , satisfy the equation . In this paper it is shown that the same equation has no integer solution with , thus a conjecture put forward by Z. Zhang, J. Luo, P. Z. Yuan (2013) is confirmed
A New Exact Algorithm for Single-Commodity Vehicle Routing with Split Pickups and Deliveries
No full textWe present a new exact algorithm to solve a challenging vehicle routing problem with split pickups and deliv-
eries, named as the Single Commodity Split Pickup and Split Delivery Vehicle Routing Problem (SPDVRP).
In the SPDVRP, any amount of a product collected from a pickup customer can be supplied to any delivery
customers, and the demand of each customer can be collected or delivered multiple times by the same or
dierent vehicles. The vehicle
eet is homogeneous with limited capacity and maximum route duration. This
problem arises regularly in inventory and routing rebalancing applications, such as in bike-sharing systems,
where bikes must be rebalanced over time such that the appropriate number of bikes and open docks are
available to users. The solution of the SPDVRP requires determining the number of visits to each customer,
the relevant portions of the demands to be collected from or delivered to the customers, and the routing of
the vehicles. These three decisions are intertwined, contributing to the hardness of the problem.
Our new exact algorithm for the SPDVRP is a branch-price-and-cut algorithm based on a pattern-based
mathematical formulation. The algorithm relies on a novel label-setting algorithm used to solve the pricing
problem associated with the pattern-based formulation, where the label components embed reduced cost
functions, unlike those classical components that embed delivered or collected quantities, thus signicantly
reducing the dimension of the corresponding state space. Extensive computational results on dierent classes
of benchmark instances illustrate that the newly proposed exact algorithm solves several open SPDVRP
instances and signicantly improves the running times of state-of-the-art algorithms
Studies of true bugs of Xinjiang, western ChinaILeptopodomorpha: shore bugs (Hemiptera: Heteroptera: Saldidae)
No full textFIGURE 18. Biotope of H. minuta sp. n. in region near lake Lop Nur: bugs occur near ephemeral grassy pools (photo by Yuan Lei).Published as part of Vinokurov, Nikolai N., Luo, Zhaohui & Lü, Zhaozhi, 2012, Studies of true bugs of Xinjiang, western China. I. Leptopodomorpha: shore bugs (Hemiptera: Heteroptera: Saldidae), pp. 51-61 in Zootaxa 3336 on page 58, DOI: 10.5281/zenodo.28132
Multilayer ferroelectret-based energy harvesting insole
No full textThis paper reports a flexible energy harvesting insole made of multilayer ferroelectrets, and demonstrates that this insole can power a wireless signal transmission. We have previously studied the energy harvesting characteristics of single and 10-layer ferroelectrets under compressive forces with quantified amplitudes and frequencies. In this work, we fabricate a flexible insole using multilayer ferroelectrets, and increase the number of layers from 10 up to 80, then use this insole to harvest energy from footsteps. We use this insole to power a commercial ZigBee wireless transmitter, and successfully demonstrate that an 8-bit data transmission can be solely powered by the energy harvested from this insole for every 3 to 4 footsteps. It confirms the anticipation from our previous work that the multilayer ferroelectrets are capable of powering the start-up and transmission of a low-power chipset, and shows a potential of using this energy harvesting insole in wearable applications
An electromechanical model of ferroelectret for energy harvesting
No full textFerroelectret is a cellular polymer foam that is able to convert compressive and bending forces into electrical signals, which 10 can be used for both sensing and energy harvesting. In the past several research groups have proposed theoretical models that 11 relate the output voltage of the ferroelectret to its mechanical deformation. This is particularly useful for sensing applications 12 where the signal-to-noise ratio is important. However, for energy harvesting applications, a theoretical model needs to include 13 both the voltage across a resistive load and the duration of the electrical signal as energy is an integral of power over time. In 14 this work, we propose a theoretical model that explains the behaviour of a ferroelectret when used as an energy harvester. This 15 model can be used to predict the energy output of a ferroelectret by knowing its parameters, and therefore optimize the harvester 16 design for specific energy harvesting application
The nature and evolution of H alpha emitters at high-z with HiZELS
No full textThe High-z Emission Line Survey (HiZELS) is targeting H alpha emitters at z similar to 0.8 - 2.2, and, by probing large volumes down to faint fluxes with WFCAM on UKIRT, is resulting in the largest samples of high-z H alpha selected star-forming galaxies. With HiZELS, we have accurately measured the evolution of the H alpha luminosity function up to z > 2 in a fully consistent way and determined the H alpha-based star formation history of the Universe since z similar to 2.2 for the first time. We have found important morphology-H alpha relations and have been able to show that it is the evolution of disk galaxies from z similar to 1 to z similar to 0 that is responsible for the decline in the cosmic star formation activity not the decline in merger activity. Furthermore, we have conducted the first detailed clustering analysis of H alpha emitters at z similar to 1 and their evolution up to z > 2, not only finding strong relations with H alpha luminosity and infra-red luminosity, but also suggesting a single, fundamental relation valid over the last 10 Gyrs, relating the dark-matter halo mass and quenching of star-formation across cosmic time. HiZELS is probing a large variety of environments, enabling us to detail the dependence of star formation activity on environment and stellar mass, reconciling previous contradictory results in the literature and providing a much sharper view of our understanding at z similar to 1
Research on Satellite Network Security Mechanism Based on BlockChain Technology
No full textDue to satellite physical constraints in terms of available power and area, data processing capacity is low, storage and security are limited. It is a challenge to protect satellite network from illegal information access and use storage space effectively. In this paper, a blockchain technology-based on authentication and privacy protection scheme is proposed for a satellite communication network. to this aim, an architecture consisting of both conventional and restricted devices connected to the blockchain via a wireless heterogeneous network is deployed. The communication is carried out through registration, authentication and revocation. In this scheme, the satellite will forward the collected information to the ground base station, which will record all key parameters on the distributed blockchain and all malicious node certificates will be cleared from the blockchain by the ground base station. The simulation results show that the scheme has been greatly improved in terms of communication security and communication overhead
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