34,584 research outputs found
Potential techniques and development activities in diver suit heating
A prototype compact reactor suitable for combustion of propane with oxygen under shallow as well as submerged deep submergence diving conditions is reported. The device is used to heat the circulating water in a water tube-type diving suit
Enhancing Perceptual Attributes with Bayesian Style Generation
Deep learning has brought an unprecedented progress in computer vision and
significant advances have been made in predicting subjective properties
inherent to visual data (e.g., memorability, aesthetic quality, evoked
emotions, etc.). Recently, some research works have even proposed deep learning
approaches to modify images such as to appropriately alter these properties.
Following this research line, this paper introduces a novel deep learning
framework for synthesizing images in order to enhance a predefined perceptual
attribute. Our approach takes as input a natural image and exploits recent
models for deep style transfer and generative adversarial networks to change
its style in order to modify a specific high-level attribute. Differently from
previous works focusing on enhancing a specific property of a visual content,
we propose a general framework and demonstrate its effectiveness in two use
cases, i.e. increasing image memorability and generating scary pictures. We
evaluate the proposed approach on publicly available benchmarks, demonstrating
its advantages over state of the art methods.Comment: ACCV-201
Network power flow analysis for a high penetration of distributed generation
Increasing numbers of very small generators are being connected to electricity distribution systems around the world. Examples include photovoltaics (PV) and gas-fired domestic-scale combined heat and power (micro-CHP) systems, with electrical outputs in the region of 1 to 2 kW. These generators are normally installed within consumers' premises and connected to the domestic electricity supply network (230 V single-phase in Europe, 120 V in North America). There is a growing need to understand and quantify the technical impact that high penetrations of such generators may have on the operation of distribution systems. This paper presents an approach to analyzing this impact together with results indicating that considerable penetrations of micro-generation can be accommodated in a typical distribution system
A high dynamic Micro Strips Ionization Chamber featuring Embedded Multi DSP Processing
An X-ray detector will be presented that is the combination of a segmented
ionization chamber featuring one-dimensional spatial resolution integrated with
an intelligent ADC front-end, multi DSP processing and embedded PC platform.
This detector is optimized to fan beam geometry with an active area of 192 mm
(horizontal) and a vertical acceptance of 6 mm. Spatial resolution is obtained
by subdividing the anode into readout strips, having pitch of 150 micrometers,
which are connected to 20 custom made integrating VLSI chips (each capable of
64-channel read-out and multiplexing) and read out by 14 bits 10 MHz ADCs and
fast adaptive PGAs into DSP boards. A bandwidth reaching 3.2Gbit/s of raw data,
generated from the real time sampling of the 1280 micro strips, is cascaded
processed with FPGA and DSP to allow data compression resulting in several days
of uninterrupted acquisition capability. Fast acquisition rates reaching 10 kHz
are allowed due to the MicroCAT structure utilized not only as a shielding grid
in ionization chamber mode but also to provide active electron amplification in
the gas.Comment: 5 pages, 7 figures, distilled by AFPL Ghostscript 7.0
Wavelet-based voice morphing
This paper presents a new multi-scale voice morphing algorithm. This algorithm enables a user to transform one person's speech pattern into another person's pattern with distinct characteristics, giving it a new identity, while preserving the original content. The voice morphing algorithm performs the morphing at different subbands by using the theory of wavelets and models the spectral conversion using the theory of Radial Basis Function Neural Networks. The results obtained on the TIMIT speech database demonstrate effective transformation of the speaker identity
Next generation optical instruments and space experiment based on the LDEF thermal control surfaces experiment (S0069)
The Thermal Control Surfaces Experiment (TCSE) was a successful experiment to study the effects of the space environment on thermal control surfaces using in-space optical properties measurements combined with post-flight analyses. The TCSE reflectometer performed well on the LDEF mission demonstrating that a portable compact integrating sphere spectroreflectometer can be built that is rugged and space rated. Since the retrieval of the TCSE package from space, several other instruments have evolved from its pioneering technologies. These are the Optical Properties Monitor (OPM), the Laboratory Portable SpectroReflectometer (LPSR), and the Space Portable SpectroReflectometer (SPSR). These instruments and experiment packages are described
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