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Maximum-distance-separable (MDS) codes are a class of erasure codes that are widely adopted to enhance the reliability of distributed storage systems (DSS). In this paper, we develop a new approach to construction of simple (5, 3) MDS codes. With judiciously block-designed generator matrices, we show that the proposed MDS codes have a minimum stripe size α = 2 and can be constructed over a small (Galois)...
In data storage systems, data are typically stored in redundant storage nodes to ensure storage reliability. When storage nodes fail, with the help of the redundant nodes, the lost data can be restored in new storage nodes. Such a regeneration process may be aborted, since storage nodes may fail during the process. Therefore, reducing the time of regeneration process is a well-known challenge to improve...
With the rapid development of Chinese economy in recent years, the consumption of energy increases greatly. Building energy consumption accounts for a large part of the total consumption. Building energy conservation is an essential and urgent measure to build the conservation-oriented society. In order to obtain the dynamic information of the building energy consumption efficiently and accurately,...
In order to solve the reliability estimation with incomplete reliability information in different development stages of products, an integral inference method is given in this paper. By using the maximum likelihood method, the log-likelihood function for the type-I censored and grouped data is established. The point estimation of parameters and the covariance between them are also obtained. At last,...
We proposed a new approach for target value sequencing problem using weighted evidence theory. Target value evaluation index system is constructed located at artillery battlefield, the uncertain target information are fused based on the evidence theory, the index weight is decided based on analytic network process. The case proves the reliability of the results and the validity of this method. This...
Solder joints on the Printed-Circuit board (PCB) serve as mechanical and electrical connections. Their function maybe simple, but the reliability of the solder joints may affect the entire device or system. They are usually the weak links when the electronic products are exposed to a variety of load conditions from their operation and storage, such as temperature cycling, vibration, shock and humidity...
This paper devotes to studying reliability of a bicycle repairable model with step-by-step maintenance policy by C0-semigroup theory. Firstly, we get that the system has a unique nonnegative time-dependent solution. Moreover, we obtain that the time-dependent solution exponentially converges to the steady-state solution, which is the positive eigenfunction corresponding to the simple eigenvalue 0...
As the increasing demand for large capacity, high voltage and high reliability power transformers in urban power grid, oil-free, non-flammable and non-explosive equipment is recommended. For this reason, evaporative cooling transformers, gas insulated transformers and other electrical equipment using fluorocarbon as coolant and dielectric have been developed. This paper presents an experimental survey...
In cooperative spectrum sensing, each cognitive radio (CR) user needs to report its local sensing results to a common CR user for a final decision. Most of existing contributions assume that such a reporting is perfect, i.e., there always exists an idle channel to accomplish an error free reporting. However, it is not true in practice since the reporting actually belongs to secondary transmission...
Government supervision is one of the significant factors which influence the supervision of coal mine production safety, and the level of coal mine production safety is related directly to the performance of government supervision. In this paper, Dempster-Shafer theory is used to analyze the influencing factors of government supervision performance. Then, the index system and the evaluation model...
A modified particle swarm optimization (MPSO) algorithm is proposed to solve reliability problems in this paper. The MPSO modifies the velocity updating of particle swarm optimization (PSO) algorithm. For each particle, its personal best particle and the global best particle are separated to update its velocity, in other words, either its personal best particle or the global best particle is considered...
Construction cranes as major lifting equipments are widely used in infrastructure construction projects. With the number of manufacturers increasing and the series of products becoming more and more complete, the evaluation of their overall performances is becoming a focus point. Moreover, the comprehensive evaluation of the construction crane is a multi-level, multi-factor decision-making process...
In order to improve the detection accuracy and stability of the damping ratio parameter of boxed milk quality fast detector, according to wavelet transform theory, this paper presents a method that wavelet ridge is used to extract the envelope curves of the detector torsion response curves, and then take the logarithm to fit a straight line to get the damping ratio of the system, and thus use the...
This article introduces a reliability growth assessment method, using dynamic modeling idea combined with middle-position rank in statistic based on the analysis of the reliability growth management statuesque of weapons in the R&D phase and the characters showed in the phase-by-phase testing as well as small sample examination. The method can be applies to multi-phase and multi-environment test...
This article proposes that when aviation product receives laboratory reliability verification test, the selection of statistical plans is undertaken according to the product features. With considering the effect of selecting statistical plans according to aviation product features, analysis and related suggestion are given when performing reliability verification test on the aviation product in lab.
Inspection of solder joint is a critical step in the assembly of PCB (Printed Circuit Board) which requires high reliability. Previous studies have shown that a visual inspection is tedious and unreliable because the inspection process varies with the mood, time, experience and interpretation skills of an inspector. So, non-destructive inspection technology based on image captured by CCD (Charge Couple...
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