In order to study the phenomenon that the particles contained in the two⁃phase flow in the nuclear power plant are deposited in the pipeline under high temperature and high pressure, the mechanism of particle erosion on the pipeline is deeply explored. The similar principle and approximate modeling method are used to design and build a nuclear power pipeline. The experimental platform for the key parameters of the actual operation of the system.The results of the 30 h elbow deposition experiment show that the outer wall and inner wall of the 90° horizontal elbow are the sedimentary hot area, the outer wall axial angle of 30～45 degrees is the maximum sedimentary area, the maximum deposition of Co elements is 1.98×10－10 g on 8 mm×8 mm×3 mm sample. The results of this paper can provide data basis for radiation dose prediction and radiation protection of nuclear power plants.

In this paper, based on the background of hydrogen photolysis of water, adapts the computational fluid dynamics software combined with secondary development to numerically analyze the heat transfer process inside the solar photocatalytic reactor. A high⁃quality structured hexahedral photocatalytic reactor grid was established to analyze the temperature distribution characteristics of the solar photocatalytic reactor model numerically, compile the Gaussian heat flow and validate the model combined with the solar photocatalytic water activity evaluation system for hydrogen production. This article will focus on the effect of solar radiation on the temperature distribution of the fluid inside the reactor and the reactor under full spectrum, and study the differences in temperature distribution and causes under different conditions.

In batch transportation of finished oil products, mixed oil would be produced by adjacent batch oil. The cases of 30°, 45°,60° or 90° for the joint line of the variable diameter part and the straight pipe of the variable diameter pipe were calculated by the CFD software. The conclusion show the relationship and the change law between the angle of the joint of the variable diameter part and the length were researched. The results show that with the angle increased, the mixed oil segment length decreased in the sudden expansion pipe and the opposite conclusion in the reducer, which was coincided with engineering basic phenomenon.

Along with the rapid growth of the national economy, energy consumption had been going up. At present, the petroleum reserve system in china was gradually perfect, and a large number of crude oil depots would be put into operation. The consumption of steam was very huge during storage, because of the large increase in crude oil storage. Saving energy and reducing consumption had become the most important task. The petroleum storage temperature affected the holding time and heating time, directly related to the consumption of steam. The influence of the storage temperature on the cost of the oil storage tank on different frequency of operation were calculated and analyzed. A premium scheme to provide some reference for energy saving was found, which could complete the task in time and ensure safety by comparing different schemes.

Soil temperature field changed periodically during seasons. During the long distance hot oil pipeline operation period, the pipeline operating properties would change under different soil temperature field. When setting the outlet oil temperature, Newtonian fluid, nonnewtonian fluid length and inlet oil temperature would change with different oil temperature. By aimulating the interactive temperature field between hot oil pipeline and soil temperature field how heat transfer from oil pipeline to soil was analyzed. By setting up mathematical model the change of hot oil fluid state and inlet oil temperature under different soil temperature fields was analyzed. According to the calculation results, the piping system operation conditions to realize the whole optimization could adjusted, this could also provide theoretical basis for oil transportation scheme.

At present, the integration of mobile applications and the Internet becomes increasingly popular, and the less-than-truckload transportation logistics information system based on Java ME is a application of this kind. The architecture of Java ME was introduced. The functional design of system and some key technologies were provided for resolving the problems，including high interface API，multithread，HTTP data transfer etc. The system design referred to the MVC pattern. The example simulation of system was represented. The conclusion was drawn for applying this system.

Pattern matching is an important algorithm in intrusion detection system．The efficiency of this algorithm directly affects the intrusion detection system's performance. As in the process of traditional pattern matching algorithm, matches were done according to the character order in the pattern, a pattern matching algorithm based on statistics was proposed. By using the statistical characteristics of the string itself, the algorithm chooses the least frequency substring's characters in the main string as the key characters. According to this characters' position in the main string, jump matching are done. Thus the speed of pattern matching was accelerated greatly. The experiment results show that this algorithm is more efficient than other similar algorithms.

Nowadays, the procedure of IP fragments and TCP flows serial reassembling technology have not been satisfied with the high speed network requirements. Meanwhile, every whole conversation in the network is almost similar from each other. Little distinctions exist among protocols of different application layers. It is suitable for adopting parallel reassembling algorithm. A parallel reassembling algorithm in application layer was introduced. Through this method, the balance of IP fragments and TCP flows reassembling was distributed reasonably in parallel reassembly process. A two-dimensional linked list was used to save key information. Too heavy work load of NIDS was avoided. An example of SMTP protocol was analyzed thoroughly．At last, in the light of the weakness of original algorithm，an improved algorithm was put forward. The whole mission was distributed in parts and computing ability of each node was fully used. So the parallel reassembling was reached. The test result shows that the improved algorithm is much more efficient than that of the original algorithm.

On the basis of the browser/server application environment, uploading varied files and convenient management of upload files has become one of the problems of file management applications. The program of file upload without components was designed by using Java I/O flow. The operation of uploading files includes interfaces of submission, process and management of upload files. Upload files are able to be directly stored in the appointed catalog, and upload files can be managed through database. The implement principle of upload files using Java I/O flow and database management method were discussed. And detailed solutions and implement methods were given. 