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Differential gene expression analysis is one of the significant efforts in single cell RNA sequencing (scRNAseq) analysis to discover the specific changes in expression levels of individual cell types. Since scRNAseq exhibits multimodality, large amounts of zero counts, and sparsity, it is different from the traditional bulk RNA sequencing (RNAseq) data. The new challenges of scRNAseq data promote...
It is significant to perform an effective scheduling of byproduct gas system in steel industry for reducing cost and protecting environment. The existing studies largely focused on extracting specific knowledge from human experience or directly optimizing the scheduling performance, which failed to provide a dynamic optimization process for making the scheduling scheme updated online. In this study,...
Shaper-based characterization and compression of the multi-soliton output of a large-mode area photonic-crystal fiber pumped at 1550 nm is presented. Spectral phase correction of each soliton in the output results in sub-30 fs pulses.
We demonstrate for the first time three-photon fluorescence adaptive-optics for in-vivo mouse brain imaging based on 1675-nm femtosecond pulses and MEMS spatial-light-modulator. We improve images of neurons and blood vessels up to 1-mm depth.
We demonstrate generation of femtosecond pulses tunable from 2.6–3.6 μm through soliton self-frequency shift in a fluoride fiber. 8-nJ, 75-fs pulses at 3.6 μm are obtained, with 10 times higher peak power than prior results.
We demonstrate a new platform for minimally invasive, photonics light delivery. The fabricated probes have sub-10μm cross-sectional dimensions and lengths greater than 3mm (a 1000:1 aspect ratio). We show mechanical robustness and low optical losses.
Many real-world systems can be seen as complex networks, where nodes denote elements in the systems and links denote relationships between elements. Since most of the real-world systems are vulnerable under disruptions, it is necessary to perform research on network robustness. However, finding the optimal attack on networks is a NP-hard problem, thus many methods based on ranking certain network...
With the use of nano-sized silica particles as fillers, the rheological property of the underfill composites is greatly deteriorated, due to the excessive surface energy of the nano-sized fillers and their poor interfacial compatibility with the underfill matrix. Since interface property is one of the dominant factors for determining the properties of composites, in this study, four kinds of silica...
In this summary, we propose ParkVis, a visual analytic system for monitoring movement tracking information for all of the paying park visitors. With various visualizations, our system can identify different kinds of traveler behaviors in the park, thus help park officers to segment the population and discover notable differences in the patterns of activity in the park.
In this report, we propose ParkVis, a visual analytic system for tracking the unusual patterns of all paying park visitors. Using both communication and movement data, park officers can use our system to identify and gauge the extent of unusual activity occurring in the park.
In this summary, we propose ParkVis, a visual analytic system for tracking the communication trends of all paying park visitors. Using our various visualizations, we can identify anomalous communication patterns amongst the visitors, allowing us to aid park officers in identifying particular groups and gauging the spectrum of communication activity occurring in the park.
The high speed permanent-magnet (HSPM) machine is appropriate for high speed operation due to its simple structure and high power density. In order to avoid stress damage to rotor caused by the centrifugal force and thermal stress, the strength analysis is very important. The rotor should have enough stability to avoid spaning the critical speed of bending mode. In addition, the structural vibration...
Facing tremendous volume of semi-structured XML and non-structured free text, network information retrieval is one of the most research hotspots in dealing with these data more efficiently, precisely and uniformly. Many traditional IR methods ignore text semantics and their labeling result has usually only one level, lacking of context expression as well, therefore structure extraction from free text...
Conventional linear machine consists of only one stator and one mover. In this paper, a permanent magnet (PM) tubular linear motor with multiple movers is proposed to improve the efficiency of stator field. The outer and inner movers can produce independent motions by interacting with the PM stator. It can be used in large systems requiring multiple driven elements and space saving. The employment...
Driver yawning detection is one of the key technologies used in driver fatigue monitoring systems. Real-time driver yawning detection is a very challenging problem due to the dynamics in driver's movements and lighting conditions. In this paper, we present a yawning detection system that consists of a face detector, a nose detector, a nose tracker and a yawning detector. Deep learning algorithms are...
Recently, the development in full-duplex communications has offered a great opportunity to perform simultaneous spectrum sensing and spectrum access in cognitive radio networks. In this paper, we consider a cognitive cellular network, in which the secondary base station (SBS) is a full-duplex device that can simultaneously sense the primary spectrum and transmit to the secondary users. We show that...
In the dynamic spectrum access (DSA) paradigm for cognitive radio networks (CRNs), one of the commonly used Medium Access Control (MAC) schemes is designed on basis of the popular carrier sensing multiple access with collision avoidance. However, this proposal suffers from two major problems that may significantly decrease the system performance: (1) collision among the secondary users (SUs) can hardly...
Driven by both personal and commercial interests, fast popular content delivery, as one of the key services offered by vehicular ad-hoc networks (VANETs), has recently received considerable attention. Most existing work mainly focuses on the resource allocation such as transmit power or subcarrier assignment from the on-board units (OBUs) to the roadside units (RSUs). However, due to the limited backhaul...
Femtocaching is a caching system to assist the popular content downloading services in heterogenous networks, in which femto base stations (FBSs) utilize their storage capabilities to cache popular files for mobile users (MUs). When the requested files are cached, the content can be downloaded directly from the FBSs through high-rate wireless links, which avoids the backhaul bottleneck to the core...
In traditional cognitive radio networks, secondary users (SUs) typically access the spectrum of primary users (PUs) by a two-stage "listen-before-talk" (LBT) protocol, i.e., SUs sense the spectrum holes in the first stage before transmit in the second stage. In this paper, we propose a novel "listen-and-talk" (LAT) protocol with the help of the full-duplex (FD) technique that allows...
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