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How to achieve the balance between exploration and exploitation is a open problem in the field of evolutionary computation. Diversity is used to reflect the balance in practice. In this paper, a scheme that using colony fitness defined by us in selection is proposed to achieve the balance. Such a scheme can be widely used in different evolutionary algorithms. Our experiments are executed based on...
Wireless energy transfer technologies have played an important role in the development of Internet of Things (IoTs). Most of previous studies focus on scheduling mobile chargers efficiently for rechargeable sensor nodes. In this paper, we consider optimizing the deployment for Wireless Charging Stations (WCSs) in urban area. We respect the users detouring cost, when they need move to the candidate...
This paper focuses on digital integrated circuit modeling method to characterize its function and transmission properties. The proposed method constructs the behavioral model of a digital integrated circuit, which is composed of the IO buffer section and functional section. The IO buffer section is described by IBIS, and the functional section is depicted by HDL. The two sections of the model are...
Multi-output power supply is widely used in electrical systems. It is necessary to establish a multi-output power supply model to verify the performance of the electrical system. However, little research work has paid attention to multi-output power supply modeling. This paper focuses on multi-output power supply modeling based on Multiple Input and Multiple Output (MIMO) method. The proposed method...
The phase currents of high-speed permanent magnet synchronous motor (high-speed PMSM) with sensorless control contain lots of harmonics. In order to solve this problem, a novel harmonic suppression method for high-speed PMSM based on voltage injection is proposed. The model of high-speed PMSM is established considering the existence of harmonic currents. The closed-loop harmonic current detecting...
Position Sensorless control strategies based on back-EMF detection have been widely used in the high-speed permanent magnet motors with active magnetic bearings (AMBs). However, due to the rotor vibration, the air gap flux density of motors varies with different rotor position, which introduces the distortion of back-EMF detection. In order to reduce this blight, some researches have been conducted...
Using ultrafast time-resolved THz spectroscopy, we observe two-orders-of-magnitude increase in the relaxation rate in semiconducting epitaxial graphene relative to pristine epitaxial graphene, attributed to enhancement of the optical-phonon-mediated carrier cooling and recombination over a wide range of electron temperatures.
This paper presents a significant improvement for the synthesis of texture images using convolutional neural networks (CNNs), making use of constraints on the Fourier spectrum of the results. More precisely, the texture synthesis is regarded as a constrained optimization problem, with constraints conditioning both the Fourier spectrum and statistical features learned by CNNs. In contrast with existing...
Cloud computing in recent years has become very popular and, indeed, many current applications are served from the cloud. Because the cloud architecture is based on virtual machines, VMs and VM management are quite important. Monitoring a large number of virtual machines is an important research topic. Since the establishment of the Personal Information Protection Act, there has been more attention...
In some occasions like the coal volume statistics in coal mines, the steel volume statistics in steel mills and so on, rapid measurement is required in real-time volume statistics. This paper proposed a dynamic volume measurement system based on the line structured light vision sensor. First, we accurately extract the light strip center with the Steger algorithm, and the camera intrinsic parameters...
Prior work by Pignolet et al. shows a new attacking methodology with which the attackers can disclose the whole cloud topology while deploying virtual networks in cloud, named "Topology Disclosure Attack". However, we discover some unreasonable attack assumptions in their model and this paper tries to develop a data structure, Query-Trie, providing topology disclosure attack a useful attack...
The purpose of this study was to explore the ways building a digital game-based music learning system with multimedia technology to provide enhanced learning environment along with different musicality of learning content and role-play game design for students. It is to escalate students' interesting in active learning and achieve learning effect in the course of gameplay. The results revealed that...
A fixed strategy is proposed to establish a resource allocation algorithm for tracking multiple targets distributed in hemispherical space with a multi-lined phased array, with the consideration of the beam priorities and the power limitation. Some test examples are given for verification.
A new intrusion detection mechanism in SELinux based on dual-Markov chain and triggered by critical system calls is put forward in this paper. The mechanism integrates access control with intrusion detection by Linux Security Module (LSM) in SELinux and considers both the global behaviour characteristics and local behaviour characteristics. Theoretical analysis and experimental results show that the...
This paper presents an numerical approach that considers into account the electrical behavior of the ACSR, for determining temperature distrbution, by using the ANSYS CFX over the cross sections of the aluminium conductor steel reinforced. Using this model verified by the experimental results later, we determine the temperature in individual layers, and the radial temperature difference of ACSR 240/30mm...
This paper investigates the effects of solar radiation intensity on the carrying capacity of transmission line conductors with different cross sections. The rated loading capacity of overhead transmission can decrease about 2% with the increase of solar radiation intensity of 100W/m2. Thus, it is inappropriate to take the solar radiation density as a constant in load current capacity calculation for...
Lightning stroke is the main cause of trip-outs of EHV and UHV transmission lines in China Southern Power Grid (CSG). In order to improving the lightning performance of overhead transmission lines, the lightning activities of CSG in 2006 to 2014 was analyzed. It indicates that the coastal Guangdong and Guangxi province are suffered more ground flashes, where the average ground flash density is over...
A new smart grid tendency warning system on different time dimensions is proposed in this paper. As a result, big data statistics, analysis and prediction of power network are made in the long-to-medium and short term. In the long-to-medium run, power network time-series analysis is realized through electricity consumption big data analysis technique. By using filling funnel model, which monitors...
This paper presents a novel humming feature extraction algorithm based on locality statistical analysis to tackle the problem of the instability of humming features in the query by humming (QBH) system. By carrying out statistics to humming notes sequences in both longitudinal vocal range distribution and horizontal temporal variation distribution, we can obtain the locality statistical humming features...
This paper presents an audio event classification algorithm which automatically classifies an audio event as footstep, glass breaking, gunshot or scream mainly for surveillance applications. First, the Gabor feature of the audio spectrogram is extracted, there are two kinds of Gabor features, namely global Gabor feature and local Gabor feature. Then we use Principal Components Analysis (PCA) and Linear...
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