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We experimentally investigate phase matching of high harmonic generation in a noncollinear geometry and demonstrate phase matching above critical ionization using noncollinear high-order-difference-frequency generation, which provides a route to maximize the generated photon energies.
We present a straightforward method to produce ellipticity polarized attosecond pulse trains via bicircular-driven high harmonic generation. The intensity ratio of the bicircular field can be tuned to generate attosecond pulses of nearly arbitrary polarization.
Accurate prediction of system reliability is of plenty of importance to engineering systems for accomplishing the designate function and system safety management. As the concerned system is getting complicated and more sufficient health monitoring measurement is available, the traditional reliability prediction schemes resorting to only one kind of prediction approaches, model-based or data-driven,...
Multi-frame super resolution has been well studied in recent years, but blur kernel is always assumed to be known in video super resolution problem. Most blind deconvolution algorithm can both estimate the blur kernel and the sharp image. In this paper, we originally adopt a fast single image blind deconvolution algorithm in video super resolution to estimate high-resolution image and blur kernel...
For the development of residual current protection device in low voltage network, aiming at complexity and uncertainty of residual current spectrum in the transient process of biological electric shock faults, the Hilbert-Huang transform is applied to analyze spectrum characteristics of each intrinsic mode function (IMF) component in residual current and determine the distribution of each IMF at different...
Pulse compression is a generic technique in radar signal processing which is commonly used to increase the range resolution as well as the signal-to-noise ratio (SNR). To achieve a higher range resolution, the transmitted signal with a larger time-bandwidth product is required. However, the computational complexity for the pulse compression of such signals is high. In this context, we propose a novel...
Fast and accurate detection of elderly falls can significantly reduce the rate of morbidity and mortality. In the past decade, extensive research has been performed to achieve real-time fall monitoring solutions. In this paper, we consider the radar-based modality and utilize the family of fractional Fourier transform to enhance the motion Doppler signature of falls. Compare with the conventional...
We present the first circularly-polarized soft X-ray harmonics to photon energies >160eV. Bright phase matched beams are used to characterize important materials with intrinsic perpendicular magnetic anisotropy for the first time using tabletop sources.
Based on equivalent simplification of distribution network, an effective method was described to identify the faults' effect on load points' reliability accounting for islanded operation in this paper. According to the characteristics of distributed generators (DGs) and annual average load curve, the corresponding probability models can be formulated. On this basis, an improved sequential Monte Carlo...
We demonstrate the highest flux tabletop coherent soft X-ray source to date, using high harmonics driven by a single-stage Ti:sapphire-pumped OPA at 1.3µm. The spectrum extends to 200eV, with a flux of >106 photons/pulse/1% bandwidth.
Multi coding schemes on channel quality indication (CQI) report cause high hardware complexity in Long Term Evolution (LTE) system. In this paper, a unified coding scheme limited that the CQI bits length equals to 11 is proposed to reduce this complexity. This scheme selects one tail-biting convolutional code (TBCC) to substitute Reed-Muller (RM) (32,11) code through exhaustive search method, and...
Basal ganglia, consisting of the putamen, caudate nucleus, pallidum, substantia nigra and subthalamic nucleus, are associated with a variety of functions, including motor, cognitive, motivational, and emotional processes, and play an important role in numerous neurological and psychiatric disorders. Here, we utilized two kinds of resting state functional connectivity techniques: independent component...
Bipolar depression is a common psychiatric diagnosis that describes a category of mood disorders. This disease threatens human's life and quality of life with its high morbidity and mortality. Bipolar depression is characterized by the diversity of clinical symptoms (manic symptoms, depressive symptoms and psychotic symptoms) and courses of complex and is easily confused with schizophrenia, major...
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