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In this paper, we review big data characteristics and security challenges in the cloud and visit different cloud domains and security regulations. We propose using integrated auditing for secure data storage and transaction logs, real-time compliance and security monitoring, regulatory compliance, data environment, identity and access management, infrastructure auditing, availability, privacy, legality,...
In this paper, we discuss the couple-group consensus problem for heterogeneous multi-agent systems with communication and input time delays. From the perspective of the competitive relationship between agents, a novel group consensus protocol is designed which is distinctive to most of the existing works based on the cooperative networks. Specifically, we relax the restrictive assumptions existed...
In order to test the performance of the motor driver, a power converter can be used to replace the real motor, both of which have the same electrical characteristics. This is a real-time control system. The foremost challenge in this system is the modeling of the real-time motor simulator based on the mathematical model of permanent magnet synchronous motor. This paper introduces the background and...
The introduction of the new situation of power industry reform program marks the formal launch of China's new round of power system reform. This paper focuses on the new electricity reform program, studies the impact of the new electricity reform on the grid investment, and discusses the investment principle and investment strategy of the new power reform. It is considered that the introduction of...
In view of the support vector machine (SVM) model applied in vibrant fault diagnosis for hydro-turbine generating unit, it exists problems of parameter settings and classification-plane incline due to unequal sample, which leads to lower diagnosis accuracy. As a new bionic intelligent optimization algorithm for glowworm swarm optimization(GSO), it has the characteristics of strong versatility and...
Basin-type insulators are major insulating component and the conductive supporting structure of GIS(Gas Insulated Switchgear) and GIL(Gas-insulated Metal-enclosed Transmission Line), and have significant influence on the performance and reliability of the equipment. Many studies focused on the mechanical strength and environmental adaptability since the application of basin-type insulator. The simulation...
Porcelain post insulators are widely used in power equipment as insulation-supporting structure. The current standard has clear requirement for the overall strength of porcelain post insulators; however, the operation and maintenance data of various operating conditions show that shed damage is a major failure type of porcelain post insulators. At present, strength verification of cantilever beam...
Objective: In this study, we attempted to develop an accurate and effective rhythm analysis tool which gives spectrum of Transcranial magnetic stimulation (TMS) evoked Electroencephalography (EEG) oscillation with both high resolution in time and frequency domain for understanding the TMS induced EEG and relative neural mechanisms. Methods: We investigated the possibility of applying the synchrosqueezing...
Cylindrical arrays are widely used in sonar systems for underwater target detection. For the sake of reducing calculation, each line of hydrophones at the same azimuth direction aligned with the cylinder axis are hardwired together in practice and thus, each line array with omnidirectional sensors becomes a directional sensor steered to broadside. As a result, the cylindrical array can be treated...
This article presents a developmental method to identify the maximum pose error for Stewart platform. The pose error is mainly caused by installation errors, joint clearance errors and the actuation errors. The relationship between pose error and installation errors, as well as branch length errors, are derived from inverse kinematic equations. Utilizing D-H (Denavit-Hartenberg) matrix differential...
In this study, the conventional beamforming (CBF) and the minimum variance distortionless response (MVDR) beamforming with a line hydrophone array mounted on an infinite rigid cylindrical baffle are proposed. Based on decomposing the sound field into a summation of harmonics, a model is introduced to compute the noise cross-spectral matrix in the spherically isotropic noise field. Some design examples...
In this paper, for any given prime power q, using Helleseth-Gong sequences with ideal auto-correlation property, we propose a class of perfect sequences of length qm−1/q−1. As an application, a subclass of constructed perfect sequences is used to design optimal and perfect difference systems of sets.
As the rapid development of precision medicine, in-vivo manipulation of micro/nano-scaled particles has attracted increasing attention in recent years. The collision is one of the main reasons that falls the in-vivo particle transportation fail. In this paper, we develop an in-vivo cell transportation control approach using a robotically controlled optical tweezers manipulation system, where a so-called...
With the rapid development of Internet technologies such as cloud computing and big data, the scales of distributed information systems in big companies have grown to enormous sizes. Automatic detection and diagnosis of system faults in the large-scale information systems is complicated and important in both practice and research. In this paper, we propose a Graph-based Fault Diagnosis approach in...
Continuous evolution of virtualization-related technologies have benefit greatly flexibility and reliability of software system. However, although virtualization removes binding between application and server underneath, it complicates the regular runtime hierarchy into an intricate structure, where cross-layer monitoring and holistic evaluation becomes challenging. Currently lots of monitoring practices...
In this paper, a fluid-thermal coupled finite element model is established to calculate the temperature field of dry type air core reactor, the inner structure of reactor is built both considering the calculation accuracy and computation time. According to simulation results, the detailed temperature distribution regularity are given both with and without the rain cover, and it can be achieved that...
In fusing highly conflicting bodies of evidence, Dempster's rule may derive counterintuitive results. In order to deal with this problem, a novel combination approach is proposed. Pignistic probability distance and uncertainty degree, both of which indicate the quality of the body of evidence from different aspect, are used to determine the weights of the bodies of evidence. Then, by applying Dempster's...
In traditional FC ceramic package, we mostly use the solder bump. But in high speed signal transmission FC package, the solder bump doesn't have good electrical performance as the signal frequency higher and higher, so we advise to use the Au bump instead of the solder bump, because of the Au bump has better electrical performance compared to the solder bump. For the same size of Au bump and solder...
A 2D FDFD eigenmode method with edge singularity correction and conformal technique is presented. The presented method takes the conducting edge field singularity into account and it is combined with the conformal method to handle more complex conducting objects. The numerical experiments showed that the presented method is more accurate than the conventional method.
Location-based social networks (LBSNs) are attracting significant attentions, which make location-aware applications prosperous. We proposed the Multiple User-defined Spatial Query (MUSQ) in [1]. However, it is impractical that non-expert users provide exact vectors to denote their preferences in MUSQ. In this paper, we design a group users weight matrix generation algorithm to represent users' preferences...
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