No abstract

The neutral data envelopment analysis (DEA) model is an alternative way to determine the weights in DEA cross-efficiency evaluation, while avoiding the difficulty in making a choice between the aggressive and benevolent formulations. However, the weights determined by the neutral model merely make the efficiency of part output bigger than other sets of weights. The neutral model is not able to make the efficiency of each output of the DMU biggest among the favorable weights. This neutral model is not purely "neutral" and not most favorable to the DMU. We proposed a revised model for the neutral model. Based on the idea that the DMU should choose a set of weights to maximize its own efficiency, this paper proposes a new cross-efficiency model. The weights determined by the two models are neutral, neither aggressive nor benevolent.

Bulk Ti‐Al‐based alloys with a mass of 30 g are prepared by electromagnetic levitation (EML). V addition makes the Ti‐45%Al alloy transform from γ‐TiAl alloy to α2‐Ti3Al alloy and changes the mechanical properties of γ and α2 phases. As a new kind of α2‐Ti3Al alloy, Ti‐45%Al‐12%V prepared by EML performs good mechanical properties at room and elevated temperatures. Further information can be found in the article number http://doi.wiley.com/10.1002/adem.202200581 by HaiPeng Wang and co‐workers.