Several Conclusions about Black-Hole Numbers;

Routing algorithm defense against black hole attacks in MANET based on mobile agent;

The energy of scalar particles in a generalized spherical symmetric evaporating charged black hole;

Entropy of the scalar field in general accelerating non-stationary black holes with electric charge and magnetic charge;

In this method,the adjustable matching threshold is used to greatly reduce the number of black holes,improving fuzzy matching for control parameters with the prescribed fuzzy similarity.

Global solutions of advection dominated accretion- flows (ADAFs) around black holes are presented.

The damage to the constant speed of Hawking s radiation done by motion layer around black holes is expounded and it is the important reason for the latter to remain undetectable.

A entire study of the spacetime metric and entropy of the system containing a blackhole;

The entropy of ideal gas which collapses to a blackhole by self-gravitating is studied.

These security problems were blackhole, denial of service (DoS), routing table overflow, impersonation, power consumption and information disclosure.

The appearing of " IT black hole " with the development of the information, makes IT management become one of the hot issues of enterprises instantly , and the key link of the IT manage is whether IT goal of the company conforms with its strategic objective.

The paper briefly analyzed the question of “IT black hole” and reasons that they appeared in the course of Constructing ERP,and put forward a way to solve these questions.