无线电电子设备在现代尖端科学技术领域内日益被广泛地应用,而且对其要求也越来越高。如自动控制、原子能、电子计算机、导弹、火箭、人造卫星等方面使用的电子设备既要求有高度的控制准确度,又要求能保证高度可靠地工作。特别在一次使用的导弹、火箭,人造卫星或要求长期工作稳定的地缆、海缆载波通信中使用的电子设备,这样的要求更为突出。否则因电子设备不可靠,将造成严重的政治、经济损失。由于尖端科学技术的迅速发展,电子设备的应用范围越来越广泛,环境条件越来越恶劣,电子设备也随着越来越复杂,使用的元件数迅速增加。因此,电子设备的可靠性 Radio and electronic devices are increasingly widely used in modern cutting-edge science and technology, and their requirements are also getting higher and higher. Such as automatic control, atomic energy, electronic computers, missiles, rockets, satellites and other aspects of the use of electronic equipment requires both a high degree of control accuracy, but also required to ensure a highly reliable work. This is especially true for single-use missiles, rockets, satellites, or electronic equipment used in ground-based, submarine-carrier communications that require long-term stability. Otherwise, unreliable electronic equipment will cause serious political and economic losses. Due to the rapid development of cutting-edge science and technology, the application of electronic devices is becoming more and more widespread, the environmental conditions are getting worse and worse, and the number of components used by electronic devices increases rapidly as the number of electronic devices increases. Therefore, the reliability of electronic equipment