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In this paper, the storage failure mode and mechanism of optoelectronic couplers are studied by Accelerated Degradation Testing (ADT) and a series of following analyses. Firstly, the type of optoelectronic coupler to be studied is determined in the paper. Then, an ADT is conducted, which ends after 4176 hours. Then it is found that all the parameters show no degradation except for Current Transfer...
We introduce a methodology for automated test compression during electrical stress testing of analog and mixed signal circuits. This methodology optimally extracts only portions of a functional test that electrically stress the nets and devices of an analog circuit. We model test compression as a problem of optimizing functional of the transient response. We present a random tree based approach to...
Life evaluation method of complex systems is facing main difficulties including selection of multiple failure modes or competition failure mode, and expensive test equipment and high testing costs currently. To solve this problem, a multiple step down stresses accelerated life test evaluation method is put forward based on the reliability growth model of complex systems. We reduce the comprehensive...
Random instruction sequence (RIS) tools continue to be the main strategy for verifying and validating chip designs. In every RIS tool, test suites are created targeted to a particular functionality and run on the design. Coverage metrics provide us one mechanism to ensure and measure the completeness and thoroughness of these test suites and create new test suites directed towards unexplored areas...
The paper is concerned with the development of a micro testing machine for solder joint specimens. The micro tester has been developed for testing a new solder alloy, namely Innolot (Sn-Ag3.7Cu0.65Bi3.0Sb1.43Ni0.15), under various cross-beam speeds and temperatures. In addition, the procedure for fabricating lap-shear solder joints, which will be tested under monotonic and creep loadings, is given...
This paper describes and discusses two methods, with which highly accelerated aging tests on power electronics components can be done efficiently and with high performance. On the one hand, an alternative method of thermal shock tests with a liquid ambient medium is described. By the use of liquids as an energy transfer medium with a high heat transfer coefficient, a quick coupling of thermo-mechanical...
The length of the rock bolt is an important factors to evaluate the quality of anchor. According to the fact that the calculated value of anchor length is far different from the actual situation due to a lot of noises, a de-noising method based on Empirical Mode Decomposition (EMD) and Spectral Kurtosis (SK) is proposed in this paper, to filter noise, increase SNR and improve accuracy of calculating...
Automation has been proven to increase productivity, improve quality, and reduce cost in many industries. Applied heavily in manufacturing, automation has also been used extensively to validate software. This study explores the benefits and considerations of automating the execution and analysis of verification tests of complex radar systems. This testing is performed on a complete integrated system...
Focusing on the new power reform, behavioral models of market participants are established in this paper to describe China's power market in the future and risk factors are listed based on the models. For the risk assessment of market participants, "Stress testing" in financial field is applied to China's power market to present how the risk factors impact on the tested factors.
In a load-sharing system, total workload is shared by all components and failure of one component increases workload of the surviving ones. The time interval between two consecutive component failures reflects component reliability under different workloads and is of interest to us. This study develops some methods to derive both exact and approximate confidence intervals for parameters in load-sharing...
The term of “World Englishes” describes the current and real state of English and one of their main characteristics is a large diversity of pronunciation, called accents. We have developed two techniques of individual-based clustering of the diversity [1, 2] and educationally-effective visualization of the diversity [3]. Accent clustering requires a technique to quantify the accent gap between any...
The description of the wave propagation in the multilayer adhesive structure under different forms of interfaces is very complex. For this issue, the reflection and transmission coefficient expressions of longitudinal and transverse waves with the dimensionless parameter ofÉÄ in the trilaminar plate-like adhesive structure are derived when the adhesive layer is assumed to be viscoelastic material...
Film capacitors are widely assumed to have superior reliability performance than Aluminum electrolytic capacitors in DC-link design of power electronic converters. However, the assumption needs to be critically judged especially for applications under high humidity environments. This paper proposes a humidity-dependent lifetime derating factor for a type of plastic-boxed metallized DC film capacitors...
In 2011, the Fukushima nuclear plant accident in Japan was a major accident for the nuclear industry in the world. Following this event it became necessary to investigate if nuclear safety facilities were able to withstand natural stresses more severe than usual: earthquake, tidal wave, flood … Obviously lightning is one of those natural stresses. Lightning impulses different from standardized lightning...
Reliability test of seawater hydraulic pumps in deep-sea environment is a prerequisite for its application in deep-sea equipment such as underwater robot and hydraulic buoyancy adjusting system. It is essential to explore the deep-sea test method and device for seawater hydraulic pumps. Based on the previous studies, a deep-sea simulated experiment devices is developed to test seawater hydraulic pumps,...
A Pentacopter is a multicopter which is a mechanically simple and stable aerial vehicle whose motion is controlled by speeding or slowing many downward thrusting motors/propeller units. Pentacopter are aerodynamically very stable and absolutely require an on-board computer for stable take-off, landing and flight. The flight controller gathers the instructions, combines data from small on-board sensors...
Efficient cooling method helps to improve the output performance of a motor, and liquid cooling is one of the best cooling methods. In this paper, a linear resonant testing platform is proposed to simulate the reciprocating motion of the linear oscillating motor, in which two check valves are adopted to achieve the cooling oil circulating. The thermal model is presented to calculate the thermal distribution...
Hardness assurance test results of Intel state-of-the-art 14nm "Broadwell" U-series processor / System-on-a-Chip (SoC) for total ionizing dose (TID) are presented, along with exploratory results from trials at a medical proton facility. Test method builds upon previous efforts by utilizing commercial laptop motherboards and software stress applications as opposed to more traditional automated...
The neuroscience research which related to the study of sounds that affected to the person and focused on create the system that observe the effects of binaural beat and instrumental relaxing music by analyzing the recorded Electroencephalogram (EEG) signal of the participants. In addition, the Brain-Computer Interface (BCI) is widely used for recording electrical brain wave signal readings and distinguishes...
Test methods from standard waste characterization leaching tests used in the U.S., Germany, and Japan were evaluated to determine if they can be used to help evaluate potential environmental impacts from PV field breakage. To assess the representativeness of leaching test methods, PV module breakage types were evaluated from warranty return data. Field breakages mainly consist of various types of...
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