These problems root in the key elements of the central contract under BT mode, namely investment and construction contract of BT mode.

Research into the methods to lower urban rail transit construction investment;

Intensify changing management and engineering computation to effectively control construction investment;

Change the valuation notions to save construction investment;

Quantitative Analysis of Effects of Transportation Infrastructure Investment on National Economy;

This paper introduced the Charateristics of the improved direct hydrati on of iso -butene to tertiary butanol,based on a new huilt plant proposed design plan and estimated the investment for buildi ng a new plant,and made techno -economic analysis and as-sessment.

Some regulations concerned in the investment of urban rail construction, including capital resources, investment scales, investment management and the accurate assessment are discussed with some examples of German urban rail transit.

The analysis of undetermined factors about the investment construction in production of swine;

Therefore,on the basis of the inspection of the Securities Act(enacted Act)and common law(case law),it summed up the elements of investment contracts constituting securities under the Securities Act,and, accordingly analyzed the current influential social afforestati.