Urban design bridges urban planning and architectural design and the conceptual design has wide application in urban design.

Aiming at developing a method of designing IGCC systems and feasible system schema for large-scale IGCC power plants,this paper proposes a conceptual design of IGCC systems and optimization of typical IGCC cases based on the investigation of the IGCC techniques and the state-of-the-art of IGCC development around the world.

Based on the thinking process of construction activities, the paper argues that conceptual design, virtually, is the evolution of defining and deducing concept, involving a consecutive and entire conceptual concretion.

The conceptual study is the core problem of the study on the ancient books digitalization, and probing into the establishment of the concept of ancient books digitalization can make the concept of ancient books digitalization clearer.

On the problems of city gas planning and the feasibility research;

Elementary introduction of management in highway feasibility research work;

On the application of the economic evaluation in the feasibility research report of roads programs;