An anti-jamming model is set up for the high dynamic global positioning system (GPS) receiver embedded in a high-speed vehicle. With view to identify characteristics of interferences condition and shortcomings traditional null widening methods, novel statistical space–time (SSTNW) method proposed this study. The SSTNW can suppress effectively conditions remove disturbance by nonideal factors, i.e. it improves robustness algorithm GPS remarkably. At same time, adaptive processing (STAP),...

Remaining useful life (RUL) prediction plays a crucial role in prognostics and health management (PHM). Recently, the adaptive model-based RUL prediction, which is proven effective flexible, has gained considerable attention. Most research on degradation models focuses Wiener process. However, since process of some products accumulated irreversible, inverse Gaussian (IG) that can describe monotonic paths natural choice for modelling. This article proposes nonlinear IG along with...

To build more credible degradation models, it is necessary to consider measurement errors in analysis. This article proposes an inverse Gaussian-based state space model with that can capture the unit-to-unit variability of rate by incorporating a random effect. Then, lifetime distribution and alarm probabilities are derived. Under non-Gaussian assumptions, conventional parameter estimation algorithms cannot be applied directly. Therefore, improved expectation–maximization algorithm combined...

This article incorporates a skew-normal distribution into an inverse Gaussian (IG) process to represent the unit-to-unit variability of degradation rate, while symmetrical or approximately is commonly adopted in IG process. Then we derive corresponding lifetime and mean-time-to-failure including two special cases under condition that reduces half-normal normal distribution. Moreover, improved EM-type algorithm presented overcome difficulties estimating parameters. Finally, simulation studies...

Many highly reliable products (systems) usually have multiple dependent degradation processes because of their complex structure. Therefore, it is important to investigate the multivariate models along with reliability assessment in stochastic modeling. This article proposes a framework for bivariate modeling based on hybrid two performance characteristics (PCs), dependence which captured by copula functions. Considering heterogeneities among product units, different random effects are...

Abstract The structural performance analysis and solder joint strength evaluation of spot-welded stainless-steel vehicles are associated with many working conditions, significant data, repeated work. This will help researchers evaluate improve calculation efficiency quickly. Taking the body structure a vehicle as research object, this study conducted finite element simulation its stiffness, static strength, mode, fatigue by EN12663 standard. A rapid system for was developed. results showed...

The spatiotemporal evolutions of a one-dimensional collisionless decaying plasma bounded by two electrodes with an externally applied electrostatic field are studied theoretical analyses and particle-in-cell (PIC) simulations the ion extraction process in laser-induced as major research background. Based on analyses, transport charged particles including electrons ions can be divided into three stages: electron oscillation matrix sheath stage, expansion rarefaction wave propagation stage...

In this paper, the current teaching situation of "Reliability engineering" course for graduates Xi'an Research Inst. Hi-Tech are introduced.Some frequently-used data processing methods and their specific applications graduate process presented.The relevant suggestions concrete practice in future proposed.

Network reliability is extensively used to measure the degree of stability quality infrastructure services. In conventional network theory, it assumed that exact value each arc are given. However, in many real world difficult estimate precise values reliability. So a general fuzzy model where presented as proposed some articles. Due difficulty obtaining analytic solution reliability, membership functions and entire usually trigonometric function. But there other kinds functions, such...

As components in an actual nuclear system have multi states and are dependent on each other, a method for reliability analyse based Markov theory Bayes network is presented this paper. The resolves the problems of multi-state dependence simultaneously, by utilizing synthetically. Applying to analysing power-supply power plant, failure probability, RAW posterior probability component obtained, which useful evaluation, improvement weakness fault diagnosis. Synchronously, proved feasible...

Based on introduction of Extended Binary Phase Shift Keying (EBPSK) modulation, a variable bit rate (VBR) communication system is proposed in this paper. We design an algorithm for the code detection VBR-adaption receiver, and realize by use tool named System Generator. Then we set up simple multi-code rates transmitter model to test detector. Testing result confirms that receiver can rapidly capture information VBR transmission, synchronization judgment also satisfactory.

In this paper, the safety deposit was carried out by using accident tree method. Based on conclusion of evaluation and characteristics explosive, a set measures for safe management explosive storage chamber developed, which could be used chamber. The explosives.