A method with the use of strongest post-condition to the practice of reverse engineering of command program language is introduced.

The principle of partial nitrification and the merits of a new process based on that principle were analyzed, effects of the controlling conditions such as temperature, pH, dissolved oxygen, free ammonia and sludge age were discussed, and some new processes for partial nitrification were presented.

),it deals with the effect on controlling conditions for the location of air cushion surge chamber,the relation of the chamber with water passage,layout of service tunnel,compressor room,shape of air chamber and design of water curtain s.

Through analyzing of the controlling condition of indoor thermal environment quoted from the Criterion of Civil Buildings Thermal Design it indicates that the improving thermal performance of enclosed structures is the reasonable approach for buildings energy saving; and some good energy-saving methods have been put forward as well.

Introduction is made on the main points of the conditional control in the process of Heparin's preparation technology.

This paper introduces the conditional control of pump feeding lube into bearing when the submarine dives over-deeply or the propeller’s speed is too small, the high pressure pump must be turned on automatically.