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In this paper, a statistical research is carried on the radar cross section reduction (RCSR) performance of diffuse metasurface composed of two-layer stacked-patch elements. The research focuses on the broadband RCSR behavior of the metasurface in specular direction. An advanced uniform random distribution of reflection phase is proposed for the diffuse metasurface to improve the broadband RCSR performance...
Light field can generate a set of refocused images by integrating rays into any image plane. It is useful to segment focus region from the refocused image because the focus region contains depth clues. However, to the best of our knowledge, focus-region segmentation for light field images has not been reported. We firstly transform the refocused image into the space of neuron ignition sequence with...
Cost-sensitive multi-class fuzzy decision-theoretic rough set (MC_FDTRS) is proposed by considering cost sensitivity in practical fault diagnosis process. MC_FDTRS generalizes indiscernibility relation of multi-class decision-theoretic rough set to Gaussian kernel based fuzzy equivalence relation, and then it can deal with numerical data directly without discretization. MC_FDTRS introduces cost matrix...
FWorks, an integrated digital simulation platform designed for collaborative research and development on Full Authority Digital Electronic Control (FADEC) systems for aircraft engines, is presented in this paper. The internet-based and an open architecture simulation platform, containing baselined numerical models for aircrafts, engines, FADEC systems and components, provides multiple users with flexibility,...
In this paper, we present a new benchmark (Menpo benchmark) for facial landmark localisation and summarise the results of the recent competition, so-called Menpo Challenge, run in conjunction to CVPR 2017. The Menpo benchmark, contrary to the previous benchmarks such as 300-W and 300-VW, contains facial images both in (nearly) frontal, as well as in profile pose (annotated with a different markup...
Internet of Things (IoT) serves not only as an essential part of the new generation information technology but as an important development stage in the information era. IoT devices such as unmanned aerial vehicles, robots and wearable equipments have been widely used in recent years. For most organizations' inner networks, innumerable dynamic connections with Internet accessible IoT devices occur...
As a promising alternative to centralized scheduling, sample-based scheduling is especially suitable for high fan-out workloads that contain a large number of interactive jobs. Compared to centralized schedulers, existing sample-based schedulers do not hold a global view of the cluster's resource status. Instead, the scheduling decisions are made solely based on the status of a small set of randomly...
We present a 4 ns constant-pulse-duration Electro-optically cavity-dumped Ho:YAG oscillator. The average power of 12.6W and the peak power of 31.5 kW were obtain at the repetition rate of 100 kHz, corresponding to the slope efficiency of 57.2% and beam quality factor of M2 ∼1.1. The highest peak power was 310 kW at 10 kHz.
We present a far-infrared ZGP OPO laser pumped by a Q-switched Ho:YAG oscillator. The maximum output power of 8.2 W at 8.3μm with the beam quality factor M2 of ∼2.94 had been obtained.
Transit signal priority (TSP) is a cost-effective way to improve transit system punctuality and efficiency. Connected Vehicle environment can provide precise and detailed information on vehicle movements, which is essential for effective TSP operation. This paper presents an integrated control strategy of TSP and speed guidance under the environment of Connected Vehicles. The strategy targets on buses...
Sample based distributed scheduling methods have been shown to be promising lower overhead alternatives to their centralized counterparts. These methods can make fast decisions based on information gathered from just a small number of worker nodes instead of the whole cluster. Most recent works in the field tend to adopt a combination of probe actions and worker-end queues in their design. However,...
Accelerator-based platforms are heterogeneous in nature, yet most applications avoid heterogeneity, and focus on acceleration alone. Platform-level heterogeneity can bring significant performance improvement, as it essentially means using additional resources for the same computation. But is the performance gained using these additional resources worth the effort to program and deploy heterogeneous...
In this paper, a special control solution called “Virtual Voltage Source” is developed for no-load tests of induction machines. This concept is applied to a 2×27 MVA high-power machine test bench, where the test bench is requested to precisely characterize e.g. 3 MW machines at no-load currents. The developed Virtual Voltage Source thoroughly solves the stability issue of induction machines at low...
This paper presents a pumpback test bench for high-frequency high-power Variable-Frequency Drives with 11 MW power rating and up to 595 Hz load frequency. A Voltage Combiner concept is applied to allow a high-frequency output from the two IGCT bridges with minimum switching losses. The accordingly developed pumpback test bench applies a dc power coupling concept combined with a virtual grid that can...
Recently, the transformerless design of medium-voltage (MV) drives is an emerging design concept of variable-speed drives (VSD). Here, no dedicated feed transformer is used. The VSD is directly connected to the on-site facility transformer, where multiple other loads are connected as well. The benefits of such a transformerless VSD are the reduced total volume, weight, losses and system costs. However,...
Recently, the transformerless design of medium-voltage (MV) drives is an emerging design concept of variable-speed drives (VSD). Here, no dedicated feed transformer is used. The VSD is directly connected to the on-site facility transformer, where multiple other loads are connected as well. The benefits of such a transformerless VSD are the reduced total volume, weight, losses and system costs. In...
High energy storage performance and discharge properties of (Pb0.98La0.02)(Zr0.45Sn0.55)0.995O3 antiferroelectric (AFE) thick films with thickness of 85µm fabricated via a rolling process were investigated by dielectric properties and discharge performance, and the influence of electric field and electrode areas on the discharge properties was emphasized. Energy storage density and the first current...
The competitive adsorption between suppressor and accelerator is the crucial behavior to achieve void-free filling of TSV during electrodeposition. Convective velocity and potential on the reactive electrode surface are two important factors for adsorption of additives. In this paper, a method of calculating the competitively adsorptive parameter Kads is found to quantize the effect of these factors...
To protect organic flexible devices from the ambient, they have to be encapsulated. Depending on the application in mind (OLED lighting, PV) different thin-film encapsulation methodology can be chosen. Each encapsulation process has different requirements and fabrication process freedom might be restricted, for example by mechanical reliability requirements or the total cost of the end product. Here...
In this paper, the application of metamaterial-loaded Vivaldi antenna in RF energy harvester is presented. The associated Vivaldi antenna was loaded with anisotropic zero-index metamaterial (ZIM), which was designed to enhance the radiation gain. Measured results show that the radiation gain of the antenna with the anisotropic ZIM was improved by 1.2 dB to 8.37 dBi at 2.45 GHz and the measured −10...
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