In order to enhance the industrial personality , push the technical information ' s communication and development , the primary content of the magazine is practical technologies with technicality , information and commerce , which will broadcast tremendous national and international new experience , new technology , products information , national energy - saving and environment protection stories , as well as suppliers commercial dynamic activities and communications in heating , ventilation , air condition , cooling and lustration of civil engineering 杂志以"新颖、实时、实用"为办刊方针,以提高行业素质、推动技术交流与发展为宗旨,内容以实用技术为主,兼具学术性、信息性和商务性,报道了大量工业与民用建筑中供暖、通风、空调、制冷及洁净方面的国内外新经验、新技术、产品信息、国家节能和环保的方针政策,以及暖通行业产品供应商经营动态、商务交流等。
A server process ' s activity was viewed as being composed of a high layer markov chain in terms of the different states the server process entered ( reflecting different requests / commands received by the server process ) , and then within each of those states , another low layer markov chain reflected the series of system calls in that particular state . in fact , this could be regarded that the dynamic activity of process depended on not only code but also current input 由于服务进程的行为不仅于依赖进程的代码也依赖于当前的输入,所以一个服务进程的行为可以被看成由一个高层能体现进程进入不同状态的马尔可夫链组成(对应于服务进程接收到的请求或命令) ,然后在每一个特定的状态下是由另一个低层系统调用序列组成马尔可夫链。