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Control of the capillary driven underfill flow process is a very important problem in flip chip technology in electronics packaging. The challenge here is to uniformly distribute fluids in the gap, which is composed of the chip and substrate and solder bumps. In this paper, we first present a conceptual model of the flow behavior of underfill materials, which has four stages, leading to the finding...
Spin-Transfer Torque RAM (STT-RAM) is a promising cache candidate studied frequently in recent years. Compared to the traditional SRAM, The STT-RAM is more promising for future on-chip caches due to STT-RAM's long endurance, low leakage, high density and high access speed. Nevertheless, the major challenges of using STT-RAM as L1 cache are its write energy and write latency. It is feasible to use...
For the requirements of safe and effective when cleaning, we designed a kind of high-pressure pulse gas impact descaling device. The device adopts pneumatic control, using the energy of the jet flow and shock wave produced by the instantaneous release of compressed air to smash the attachment in the wall of the pipe, so as to achieve the pipe cleaning. Analyzed the principles and operation process...
The process of knowledge transfer in knowledge alliance is analyzed and studied in this paper systematically. Using dynamic game theory, dynamic game model of knowledge transfer between knowledge transfer and receiver is established, optimal strategies of both sides are found, and a perfect Bayesian equilibrium is achieved and some effective measures are put forward to promote knowledge transfer....
Through a series of direct shear tests on the interfaces between soil-soil and soil-roots of Artemisia sphaerocephala and Sabina valgaris, friction properties of the interface were examined, and the influence of normal stress, dry density of soil, water content of soil on friction properties were analyzed. The results showed that the shear relationship of interface between soil-roots of Artemisia...
In this paper, we investigate the influence on shear strength of the roots of four typical plants which can fix the soil in coal mining subsidence area by direct shear tests ,and the shear strength of the root soil composite .The results indicate that with the same root diameter (1.25 mm) , Sabina valgsris Ant., Salix psammophila, Caragannmicrophylla Lam. Artemisia sphaerocephala Krasch are more intensive...
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