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Electronics in downhole drilling, automotive and aerospace applications is expected to sustain prolonged periods of operation at high temperature while being subjected to shock and vibration. High temperature shock and vibration loads may be generally in the strain rate range of 1-100 per sec. Material data on properties at elevated temperatures and high strain rates is scarce. There is lack of material...
The existing configuration of the JESD22-B111 test board does not impose identical strains during drop test on all the 15-components on the test board, requiring a large numbers of boards to develop meaningful life distributions. Two new candidate designs intended to serve as replacements for the JEDEC JESD22-B111 test board have been analyzed. Configuration-A includes four components located symmetrically...
Li-ion batteries have high energy densities and long lifetimes, which are increasingly used in electric vehicles (EV) and hybrid electric vehicles (HEV) now. The state of charge (SOC) is the most important parameter to evaluate the battery and is one of the key factors improving the performance of EV and HEV. With respect to the cells voltage, battery voltage and battery current, the battery model...
A system composed of a machining center, related measurement tools and its software can achieve on-line reverse. However the measuring point data through the ways to obtain is a lower accurate. It is difficult to obtain satisfactory reverse results using least squares method to deal with these data. To solve the problem, an On-line Reverse Method for Cylindrical Surface is propose, which combines...
Based on the design of one kind multistage flameproof submerge pump for coal mine, the influence of the geometric parameters to the performance of the impeller was analyzed. The performance of the pump was predicted by the commercial software FLUENT. Reynolds-averaged Navier-Stokes equations was discretized, solved with κ-ε turbulence model and the SIMPLEC algorithm in double coordinate system. The...
The modified Szabo's wave equation is an effective and new model for the power law frequency-dependent dissipative acoustic wave traveling through the complex lossy medium, in which the positive fractional derivative has first been used. This study makes an attempt to test the influence of tumor sizes on the reflecting line of ultrasound pressure by numerical simulating the CARI technique for breast...
In this paper a model is presented to explore the relationship between organizational culture, social capital, absorptive capacity and knowledge integration capability. Through theory analysis, the research framework was built and structural equation model was constructed. Then an empirical research was carried out based on a sample of 309 Chinese enterprises. Research results proved that organizational...
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