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In this paper we present a decision feedback channel estimation way for the mobile satellite communication system in order to improve the bit error performance. The transmission is disturbed not only by shadowing and multipath effects and additive white Gaussian noise, but also by the weather attenuation. The conventional Least Square(LS) is not well suited to detect the transmitter sequence, whereas...
Disaster, natural or man-made, is the main threaten of survivability and reliability of networks. The development of content connectivity provides a new way of protection against disaster to ensure the reliability of network service/content. This paper focuses on shared backup path protection based on content connectivity against disaster in the context of elastic optical datacenter networks. In this...
Erasure-coded distributed storage systems can offer reliable storage services in a cost-effective manner. However, when disk failures occur in such systems, it is desirable to recreate the lost data with the help of surviving nodes to preserve the data redundancy. A key requirement during the recover process is to minimize the repair locality and computational complexity. We propose a simple framework...
Automatic processing of large volume scanned Chinese bank statements is a urgent demand recently. Conventional methods can not well handle the following challenges of this problem: various layout styles, noises, and especially requirement of fast speed for large Chinese character set. This paper proposes a knowledge based table recognition method to meet fast speed requirement with good accuracy....
We propose a novel signal model, based on sparse representations, that captures cross-scale features for visual signals. We show that cross-scale predictive model enables faster solutions to sparse approximation problems. This is achieved by first solving the sparse approximation problem for the downsampled signal and using the support of the solution to constrain the support at the original resolution...
This paper presents a method to detect receptive capacity of external ultra-high frequency (UHF) senor for gas insulated switchgear (GIS) partial discharge (PD) testing using time-frequency reference method. It is always crucial to detect PD using UHF inspection device for live GIS, while the affection of senor performance on PD detecting accuracy is very important. So this paper, analyzing the disadvantages...
Dissociation and suppressing interference are always crucial for partial discharge live and on-line detection for substation equipment, so it is necessary to research on interference signal feature for substation in different places, in order to achieve on separating true partial discharge from interference signal. This paper proposes, which takes 110kV, 220kV and 500kV substation as research objects,...
This essay presents an efficient intelligent over-voltage hierarchical recognition system for 110kV substation based on LSSVM optimized by gridding optimal algorithm. It is very indispensable to analyze and find the causes of over-voltage for ameliorating insulation coordination in power system. According to analyzing field over-voltage data from over-voltage on-line monitoring devices installed in...
Current “condition based maintenance decision making” of power transformers has not taken reliability and economy into consideration generally, which will cause large financial losses to electric enterprises. To solve this problem, a maintenance decision making model based on life cycle cost analysis was established to select the best maintenance strategy for transformers. After building the relationship...
We propose a shared protection scheme based on the sharing principle among multiple end-to-content backup paths in optical datacenter networks. Numerical results show it can reduce wavelengths consumption while ensuring the survivability against multi-failures.
Credit risk management has been one of the most serious problems for banks and other financial institutions. With the continuous improvement of the economic system reform of our country, the establishment of market mechanism and perfect, the rapid development of capital markets and the banking sector, the existing credit evaluation system and method have been unable to keep up with the needs of the...
Most wireless sensor networks performs a data collecting task, which means every node collects data of the environment such as temperature, humidity and shaking, then send them to the sink. In this case, all nodes would frequently send small packets to the sink, when the network is large, it will lead to heavy traffic load, especially in the area near the sink, nodes will suffer great congestion and...
In this paper, the model of BGA solder joints were established by the finite element method (FEM). It would reflect the variations of creep stain in solder joints more truly by the cyclic temperature loading. The results are as follows: when the BGA solder joints subjected to cyclic thermal loading, the equivalent creep strain move to the center of solder joints gradually with the increase of the...
As an important bearer communication network for smart power distribution and utilization sever, the terminal communication access network should satisfy the various quality of service (QoS) requirements. And the queue scheduling is one of the key technology in multi-service QoS support. In this paper, a queue scheduling algorithm based on buffer size is proposed to minimize the waiting time of emergency...
In recent years, several advanced algorithms based on clustering, multi-method or data fusion approaches have been proposed to estimate heartbeat intervals from non-standard ballistocardiography (BCG) data. These advanced algorithms generally have higher computational complexity than J-peak based algorithms. This fact motivated us to study the problem of extracting J peaks from non-standard BCG data,...
In this paper, we were trying to optimize bondline thickness of sintered nanosilver on assembling high power laser diode modules (40 W). The shear strength and void ratio of the sintered joints were reported in this work. Cavity surface contamination was discussed in cases of different as-printed bondline thickness. The electro-optical properties of the sinter-packed laser diode module by sintering...
Driven by higher energy and electricity demand, the world's power grid system has leapfrogged from conventional grids to modern grids, and from isolated urban grids to transregional and transnational interconnected large grids. Some technologies and equipment have been innovated to adapt the acceleration of global energy interconnection. A new type of overhead conductor with a polymer composite core...
Metasurfaces in metal/insulator/metal configuration have been widely used in photonics, with applications ranging from perfect absorption to phase modulation, but why and when such structures can realize what functionalities are not yet fully understood. Here, we establish a complete phase diagram in which the optical properties of such systems are fully controlled by two simple parameters (i.e.,...
The communications between smart grid nodes and the core network are frequently requested in smart grid. This kind of communications results in complicit power transmission paths. The paths may be time varying. The change of connections triggers the change of connections of circuits. Finally, the smart grid protection method is changed because of these frequent changes at connections of circuits....
Vehicular network is regarded as an important part of the Intelligent Transportation System (ITS). However, with the increasing number of vehicular applications, it is a challenge to meet the demands of both communication and computation. Fog computing can provide mobile users with the demanded services through low latency and short-distance local connections. This paper investigates the optimal deployment...
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