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Based on the interval tunnels between Fenghuang Xincun and Sha Yuan metro stations in Guangzhou City, the construction effects of the overlapped tunnels are researched. 3D Finite Element Method is also adopted. The distribution of stratum deformation and crown raising displacement of the lower tunnel are analyzed. Axial force, moment and stress changing of the overlapped tunnels during the different construction stages are discussed. The results show us that: the ground surface settlement trough of the overlapped tunnels is symmetrical; the crown raising displacement of the lower tunnel caused by the construction of the up tunnel is about 4∼6mm, and the total crown settlement is to decrease nearly 50% after the construction of the up tunnel; the changing of the inner force caused by the excavation is more complicated during the different construction stages, and the excavation of the up tunnel can obviously impact the lower tunnel that has already built, the adverse impact region locates in front of the working face 15m and back of that 20m. The conclusion is that lining inner force of the overlapped tunnel is favorable and endurable by the external load during the construction stage, and such design concept also can meet the requirement of the underground space's sustainable development and utilization.

This paper examines the components of quality cost in the context of rubber air spring plant. Based on the analyzing of variables that impact quality in the plant, a decision table of rough set is organized. Then rough approximation evaluative measures based on probabilistic version of rough set theory is utilized to set up a Bayes's equation that supports the manager to reach the best performance in quality decision.

The objective is to propose a cost estimating method which is fitted to recent continuously producing industrial context evolution. In order to quote the steel product price and control cost before production, estimating steel product cost accurately is important for steel enterprise. After analyzing the existing cost estimation methods, steel product cost estimation was given based on steel product features and process characteristics in this paper. Firstly, product features were extracted from the order information. Secondly, process chain was automatic generation by matching the product features and process chain attributes. If itpsilas failed, a new manual process chain was created according to product features, and process cost estimation was calculated by analyzing process cost constitutes. Finally, the model was demonstrated through an application in a steel enterprise.