Being important in the field of information security, it is essential to study the major process and the mathematical models of information security risk assessment.This paper proposed amodel based on the discrete dynamic Bayesian network and further studied the major process of the assessment.The experiment which works on the implementing platform shows the results are reasonable and feasible. The model proves that it iseffective to calculate the probability of the risk.

Urine analysis is used in clinical medicine diagnosis method. In this paper, we introduce the urine analyzer working principle. Using the color recognition sensor chip, we design a fast urine analyzer, which is mainly constituted by several parts: LCD, keyboard control, serial communication, network interface, print, ARM Control unit, sample of sensors, motion control, color capture, brightness control, etc. we studies the test strip tests, the specific gravity of testing theory, the test principle of the turbidity , the color test, the principle of color sensor and gives a the flow chart of color test subprogram.

Being important in the field of network security, it is essential to study the firewall technology that has been an indispensable part of computer networks. This paper describes a new design and implementation of ASIC firewall architecture based on the state detection technology. Implementation and measurements in a real network show that the proposed system can provide high performance with reliability, flexibility, and security.

The internet of things will bring a new development of intelligent container industry. This paper introduces the concept of the internet of things and intelligent container, it will be the trend of the development of cargo is indicated, the architecture of the intelligent container technology based on the internet of things is proposed and workflow of the intelligent container is summarized. So the application can enable the share of information among logistics participants, making the information flow the transport stream to the same and developing the efficiency and security of the transportation of containers.

In this paper, we analyze the DCF and PCF schemes, and study some conventional MAC algorithms. For the purpose of satisfying requirements of data transmission in integrated services, a new MAC algorithm based on working vacations is proposed in the paper. Using the continuous system simulation strategy, we design the simulation experiment of MAC algorithm. Combining queuing theory, the steady performance parameters of queuing model is obtained. The results show that the algorithm based on working vacations has an advantage over single PCF or DCF scheme in some indices such as mean queue length, mean delay time and system throughput.