Study on fashion commodity price forecasting issues based on fractal theory;

Product price forecasting based on correlative price net;

After briefly analyzing the price making theory in the international trade of natural gas in which the price is determined on the basis of related oil products' price, the paper introduces the vector autoregression theory into the quantitative forecasting model under the price making theory, and thus improve the price forecasting theory of natural gas.

Application of improved BP algorithms in price prediction of highway engineering main materials was discussed.

On needs of call wire prequalification from Shiyan to Tianshui for human resource

At present, tenderees simply select qualified tenderers for prequalification, however, ranking the qualified tenderers during prequalification is required for introducing the new reverse auction mechanism into bidding.

The paper analyzed the criteria of prequalification, investigated the impact and conducted further analysis on the effect.

This paper analyzes the problems in pre-qualification in the tendering activities and proposes some safeguarding countermeasures pertinently.

The pre-qualification is the starting point and the original intention of applications from potential bidders in the optimization of bidders, but sometimes it leads to the use of non-standard qualifications.