The safety of the pipeline in use is tightly linked with the resident life and belongings. Reliable structural integrity and safety of oil and gas pipelines under various service pressure events including defects should be warily evaluated. The reliability evaluation of oil and gas pipelines is necessary to prevent risk and seek an effective method. In this paper the practical reliability evaluation method is proposed, analyzes failure mode and cause about pipelines and pressure gas equipment, calculates the reliability indexes of pipe section or pipeline system, studies the faults of pipeline system effects on pipe transfer process, seeks weak links of system, and brings forward concrete and reliable measures to improve system reliability.

Abstract-Buffer overflow vulnerability is a widespread and dangerous security problem. Detecting buffer overflow vulnerability has great research value in information security area. This paper proposes a static comprehensive analytical method for buffer overflow vulnerability detection. Firstly, this method adopts many kinds of static detection tools for detecting the source codes and producing their own detecting reports. Secondly, comprehensive analysis is implemented to evaluate the reliability weights of detecting tools by training process with detection results, and further optimize the detection results. This training process can improve the efficiency of discovering buffer overflow vulnerabilities with lower rate of omissions and misstatements. The experimental results show that compared with single static detection methods, the rates of both false alert and missed alert decrease significantly.