正如自然中很难存在真空一样。 遵从经济学原理，“安全公司”这种可以解决黑客窘境的小型行业出现了，填补了业界的空白。
Since economics, like nature, abhors a vacuum, a small industry of “security companies” has emerged to exploit the hackers' dilemma.
本文首先介绍网络数据库安全的基础：即现代密码学和数据库安全，接着介绍了指纹特征在身份认证中的原理。
The thesis introduce the base of network database security, which includes modern cryptology and database security, and introduce principle of fingerprint characteristic in identity identification.
应用社会经济统计学原理，研究了安全经济统计的对象和方法。
By means of social economy statistics theory, objects and methods of safety economy statistics are studied.
本论文采用安全经济学基本原理，具体研究了建筑工程安全的投入、产出和效益。
Based on the theory of safety economics, this paper studies on safety inputs, safety outputs and safety benefits in construction projects.
性能化消防设计方法是运用消防安全工程学的原理和方法对火灾本身规律进行分析，并找出相关的设计参数的方法。
The performance based approach is applied the principle and method to analyze the development of fire, and it can find out the relation parameters to design the fire safety system.
然而，基于量子物理原理的量子密码学已被证明是保密通信中密钥安全分配的有效手段。
Nevertheless, quantum cryptography, which is based on quantum physics, has been proved to be an effective technique for secure key distribution.
并指出设计时必须充分考虑人机工程学原理，最大限度地满足人员操作和维修的需要，保护操作者的健康和安全。
It indicates that the design work needs to satisfy human requirements by applying ergonomic knowledge to protect the operators health and safety.
并指出设计时必须充分考虑人机工程学原理，最大限度地满足人员操作和维修的需要，保护操作者的健康和安全。
It indicates that the design work needs to satisfy human requirements by applying ergonomic knowledge to protect the operators health and safety.
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