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Dimensional stability is critically important to various applications for which the functions are sensitive to dimensional change and internal strain. Due to the variation of densities of materials in solder, pad metal and formed IMCs, the total volume and dimensions of solder joint could varies with time of aging or service. This paper theoretically analyzed the change in volume of tin/copper solder...
To fully make use of the abundant parameter data obtained from flight experiments, a set of probabilistic trajectory modeling procedures was proposed in this study. In a loop of flight vehicle design, it is necessary to carry out real flight experiments which will bring some parameter data. These data usually take on statistical characteristics. From these statistical data, trajectory model parameters...
Electroplating has been employed to produce metallic micro-bumps to meet the demand of high density flip chip interconnections for high-end electronic devices. Previous studies indicated that megasonic agitation is a promising approach to enable high speed electrodeposition and bumping which therefore can increase the productivity and reduce the cost of the process. This paper takes indium bumping...
An axis-parallel k-dimension box is a Cartesian product R1 × R2 × ... × Rk, where each Ri is a closed interval of the form [ai, bi] on the real line. For a graph G, its boxicity(denoted by box(G)) is the minimum dimension k such that G is representable as the intersection graph of axis-parallel k-dimension boxes. Let each Ri be of the same length, then the k-dimension box is a k-dimension cube. When...
The enhanced hypercube(denoted by Qn,k) is a very important network model because of its excellent properties which are superior to the corresponding properties of hypercube. For a given connected graph G of order n, a routing R is a set of n(n - 1) simple paths specified for each ordered pair of vertices in G. The load of a vertex (resp.edge) for a given routing R is the number of paths going through...
The job of introducing overseas intelligence is an important part in many colleges and universities. In China, there is still no unified quantitative evaluation method now. In this paper, we developed an evaluation index system for the performance of introducing overseas intelligence project, and use of non-linear DEA method to evaluate the project performance of high education, and then we can improve...
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