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To shorten the networking delay from MapTracker to ReduceTracker has attractive potential to gain high performance shuffle for MapReduce. As the original MapReduce shuffle has no locality-aware feature when assigning reduce-tasks over computing nodes, we plan to present a similarity-based distance in the proposed Cloud Node Space to evaluate distance between two computing nodes in data center. Then,...
The storage capacity of NAND Flash has increased by scaling down to smaller cell size and using multi-level storage technology, but data reliability is degraded by severer retention errors. To ensure data reliability, error correction codes (ECC) are adopted, such as BCH and low-density parity check (LDPC) codes. However, BCH codes are insufficient when raw bit error rates (RBER) caused by retention...
We show both asynchronous and synchronous, dual-wavelength femtosecond pulse generation from an SWNT-mode-locked fiber laser by tailoring the intracavity anomalous dispersion, suggesting the effect of the mode-locker on pulse synchronization in the presence of dispersion.
Reducing truck-involved crashes is a key goal of the U.S. Department of Transportation. Large trucks (gross vehicle weight > 10,000 pounds) account for only 6% to 7% of the total vehicle miles traveled (VMT) but are involved in 11% to 12% of the fatal crashes. An important aspect of truck-involved collision is that they can be very disruptive and costly. Behavioral factors are important contributors...
With the technology scaling of solid state drives (SSDs), data reliability has to be ensured by advanced Low-Density Parity-Check (LDPC) codes. As LDPC reads often take high latency, read performance involved in traditional garbage collection, called external GC, is largely decreased, which affects system performance. GC can choose not to correct data with LD-PC codes but just copy valid pages into...
LTE-M, which is an abbreviated version of LTE-MTC(Machine Type Communication) can be said to have a variety of applications, including a large number of heterogeneous interconnection of large-scale network equipment. One of the most prominent problems is that the machines may have a large amount of access requests in a short time, which can easily lead to network congestion. At present, the contention-based...
Monitoring and supervision of land resources requires several spatial databases related to land use, land planning, mineral resources, etc. It also needs support via information technologies such as GIS, GNSS, RS (3S), wireless communication, and internet-of-things. At present, in view of the requirements related to the complexity and comprehensiveness of the monitoring and supervision of land resources,...
We demonstrate simultaneous spatial and arbitrary temporal pulse-shaping with a picosecond Yb-doped fiber laser system generating an output power > 10 W. By using a self-developed feed-back control algorithm on a single polarization optical pulse shaper, we obtained arbitrary complex pulse structures in the time domain with high accuracy and at high power level. Meanwhile, the pulse shaping in...
In order to adaptively extract the subject-based time-frequency features of motor imagery EEG (MI-EEG) and make full use of the sequential information hidden in MI-EEG features, a Long Short-Term Memory (LSTM) based Recurrent Neural Network (RNN) is integrated with Optimal Wavelet Packet Transform (OWPT) to yield a novel recognition method, denoted as OWLR. Firstly, OWPT is applied to each channel...
Over the last few years, the combination synchronization of chaotic system receives a special attention. This paper introduces the idea of combination synchronization into complex networks. Based on sliding mode control (SMC) principle, the finite-time combination synchronization (FTCS) of four uncertain complex networks which combining as the form of A+B+C-D is investigated. And there are unknown...
We demonstrate a wideband tunable, ultrafast fiber laser mode-locked by using a solution deposited and encapsulated black phosphorus (BP) saturable absorber. Stable, picosecond pulses, tunable from 1535 nm to 1565 nm are generated.
In recent years, automatic technologies have been gradually applied in the batch testing process of energy measuring devices. Different from energy meters and acquisition terminals, the metering current transformers have more than ten specifications (various in size, transformation ratio, etc), and the demands for testing are more dispersed. This leads to a large number of scattered work tasks on...
A master oscillator power amplifier (MOPA) configuration ytterbium-doped pulsed fiber laser (YDPFL) with directly modulated seed has been demonstrated and 160 W output power is obtained for the laser with adjustable pulse durations in ns range. This laser can be used for many industrial applications.
We demonstrate a wavelength tunable dual-wavelength fiber laser using black phosphorus (BP) saturable absorber. By controlling the tunable filter together with a polarization controller to adjust intra-cavity birefringence, dual-wavelength pulses tunable from 1532 nm to 1545 nm are observed.
A single pixel Holoscopy for 3D high resolution optical imaging acquisition method is proposed. By using compressive sensing theory in holoscopy, we fully reconstruct the wave field from a single hologram with only 10% sampling ratio.
In this paper, we extend the idea of Index modulated orthogonal frequency division multiplexing (IM-OFDM) to the MIMO scenario and propose the precoded index modulation for multi-input multi-output OFDM (PIM- MIMO-OFDM) for downlink transmission. Based on the channel state information (CSI) at the transmitter, PIM-MIMO-OFDM jointly selects the active elements of the receiver-side space-frequency OFDM...
In this paper, a novel 4H-SiC trench junction barrier Schottky diode (TkJBS) with high-k semi-insulating polycrystalline silicon (SIPOS) is proposed. By adopting the new high-k dielectric-trench structure, the peak electric field at the corner of P+ regions (COP) can be weakened significantly, and the device breakdown voltage (BV) is enhanced. The SiC TkJBS has a 60.7% higher BV and a 88.7% higher...
Mobile Crowdsourced Access (MCA) enables mobile users (MUs) to share their Internet connections by serving as tethers to other MUs, hence can improve the quality of service of MUs as well as the overall utilization of network resources. However, MCA can also reduce the revenue-generating mobile traffic and increase the network congestion for mobile network operators (MNOs), and thus has been blocked...
Pairing-friendly elliptic curves are the key ingredients in pairing-based cryptographic applications. The construction of such curves not only influences the implementation efficiency, but concerns the security. In this paper, a more targeted algorithm is proposed for the construction of such curves. By introducing a generalized concept “parameterized families”, we convert this problem to solving...
In this paper, an effective low complexity generalized spatial modulation (GenSM) scheme with transmit antenna grouping is proposed for massive multi-input multi-output (MIMO) system to deal with the channel correlation among transmit antennas. In the proposed scheme, all transmit antennas are divided into several equal-sized groups, and spatial modulation (SM) is carried out to select one active...
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