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In order to meet the trend of miniaturization, large capacity and intelligence of the current vacuum circuit breaker, a new model of three-phase disc rotation vacuum circuit breaker has been proposed, in which the main circuit distribution was changed from the same direction to the opposite. Besides, some adjustments were made to the position of operating mechanism. The electric field distribution...
It is common for real-world applications to analyze big graphs using distributed graph processing systems. Popular in-memory systems require an enormous amount of resources to handle big graphs. While several out-of-core approaches have been proposed for processing big graphs on disk, the high disk I/O overhead could significantly reduce performance. In this paper, we propose GraphH to enable high-performance...
This paper presents a novel axial doubly salient electro-magnetic machine with a new double sets of stator structure based on the traditional permanent magnet brushless DC motor and the switched reluctance motor. A new external control circuit is designed according to the special structure and working mechanism of the motor. And according to the electromagnetic characteristics in different conditions...
Based on the requirement of IPD RF SIP application, the silicon based inductor and capacitor and rules have been studied at first. Meanwhile, a two-order silicon-based 2.4GHz bandpass filter with the size of 1.8mm*1.8mm was obtained by the combination of inductances and capacitors. The insertion loss at 2.4GHz is −1.35dB. Furthermore, to improve the selective of the bandpass filter, one transmission...
0.35mm fine pitch wafer level chip scale package (WLCSP) has been developed by NCAP for portable electronic applications. It can provide 196 pin counts in 5mm × 5mm package body size. This paper reports the development work of WLCSP and the package level and board level reliability study including thermal cycling and drop test. The technology is evaluated using a 5mm × 5mm test vehicle with 0.35mm...
Via last TSV (through silicon via) technology is more and more applied in 3D WLCSP, which can decrease package volume and increase I/O density. The process of via last includes temporary bonding, grinding, photolithograph, silicon etching, SiO2 etching, CVD, PVD, plating and so on. Silicon etching and SiO2 etching are important process of via last TSV package for interconnect technology. Temporary...
Due to the demands of the market, high density and low profile packaging options of small packaging are continuously developed. As high density packaging technologies such as Molded Underfill (MUF) on flip chip package are usually used due to its simplification of assembly process steps and the saving of the cost. For MUF process, in order to ensure void free package, it is often constructed a vacuum...
As the pollution of the modern society, the circulating fluidized bed boiler, typical of new type, efficiency and low pollution, is booming. Nevertheless, its combustion process is more sophisticated than the common one. As that, it is difficult to build an accurate digital model. As the control effect, the traditional PID is less easy to be effective. The bed temperature is an important parameter...
With the development of the times, the traditional flat-type mouse can not meet the mobile office and entertainment on the three-dimensional space control requirements. In this context, wireless squirrels do not need any plane. In the air, gently swing the mouse can achieve large-screen control, so it has a good market prospects. In this paper, after knowing the wireless flying mouse needs to achieve...
This paper provides a novel feature detection method which utilizes illumination invariant space to achieve a high performance of robustness under the variating lighting conditions. Taking advantage of the dark channel prior knowledge, the proposed method builds three indicators to describe the illumination invariant components in the RGB color space and eliminates the light sensitive parts. The components...
In this paper, we propose an iterative message passing receiver jointly performing channel, phase noise estimation and symbol detection for multi-input multi-output (MIMO) systems. The joint iterative receiver is designed using message passing techniques: general expectation maximization (GEM) and belief propagation (BP) on factor graphs. Therein, the nonlinear measurement function node and symbol...
Cache is becoming an effective method to improve the transmission rate and reduce the backhaul load. Nevertheless, owing to the limited capacity of backhaul, less power should be allocated to the users whose requested contents do not exist in the local caches to maximize the performance of the caching users. Thus, in this paper, power allocation (PA) is considered to further improve the performance...
This paper presents a capacitively-coupled chopper instrumentation amplifier (CCIA) for portable EEG detection devices. In this design, the current-reuse technology is adopted in the core amplifier and the ripple reduction loop (RRL) to cut down the power consumption of the whole system. A novel ripple reduction loop based on ping-pong auto-zeroing topology is proposed to reduce the ripple at the...
A wireless sensor network (WSN) is usually deployed in a field of interesting (FoI) for detecting or monitoring some special events. Traditionally, the WSN requires intensive deployment in which the extra sensor nodes are deployed to achieve the required coverage level. While, depending on the developments of the unmanned aerial vehicle (UAV) techniques, the UAV has been widely adopted in both military...
Many cluster management systems (CMSs) have been proposed to share a single cluster with multiple distributed computing systems. However, none of the existing approaches can handle distributed machine learning (ML) workloads given the following criteria: high resource utilization, fair resource allocation and low sharing overhead. To solve this problem, we propose a new CMS named Dorm, incorporating...
Crowdsourcing can provide a platform for evaluating software engineering research. In this paper, we aim to explore characteristics of the worker population on Amazon's Mechanical Turk, a popular micro task crowdsourcing environment, and measure the percentage of workers who are potentially qualified to perform software- or computer science- related tasks. Through a baseline survey and two replications,...
As Convolutional Neural Networks continue to produce state of the art results, more types of data are being used to see the results that would be produced. Using the heart rate data that was collected using sensors from various subjects who consumed alcohol, we converted it from the 1D waveform into a set of spectrograms. The spectrograms were fed into two pretrained CNNs, CaffeNet and AlexNet, to...
Traditional electroencephalographic (EEG)-based steady-state visual evoked potentials (SSVEPs) have been studied for decades. However, classification accuracy is still limited. One reason for this is the existence of false positives when subjects are not focusing on a stimulus or target. In this study, we used fNIRS signals to identify the time at which subject really focusing on the stimulus and...
With the development of robotic technologies over last decades, the robotic mapping or the simultaneous localization and mapping (SLAM) has got matured correspondingly. The Large-Scale Direct Monocular SLAM (LSD-SLAM) is among the most promising methods in SLAM, which not only locally tracks the motion of the camera, but allows to build consistent and large-scale maps of the environment. In this paper,...
The surface mounting equipment (SME) is critical and complex in electronic assembly process. The key issue of SME is to realize accurate positioning and high-speed under the influence of parametric uncertainties (e.g., unknown gravitational load) and uncertain nonlinearities (e.g., friction). For achieving this aim, the adaptive robust control (ARC) based on dynamic LuGre model algorithm is proposed...
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