In view of the above problems,the exploration is carried out on how to promote the laboratory plan,construction and management,thus hoping to improve teaching conditions,strengthen the experimental teaching links and ensure the quality of experimental teaching.
The paper expounds the status and existing problem of practice teaching for the talents development in engineering colleges and brings out the the practice teaching assessment standard as reference to ensure the validity of practice teaching based on the needs of employment market and the relationship between the practice teaching and social supporting conditions.
As a consequence, the action is linearizable if certain topological conditions are satisfied.
An algebraicG-varietyX is called "wonderful", if the following conditions are satisfied:X is (connected) smooth and complete;X containsr irreducible smoothG-invariant divisors having a non void transversal intersection;G has 2r orbits inX.
Here we provide certain conditions (more general than those in [Ka1]) which guarantee preservation of the topology under a modification.
We express the vanishing conditions satisfied by the correlation functions of Drinfeld currents of quantum affine algebras, imposed by the quantum Serre relations.
We discuss the relation of these vanishing conditions with a shuffle algebra description of the algebra of Drinfeld currents.