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Hacker Professional Ebook part 177

Tham khảo tài liệu 'hacker professional ebook part 177', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Source Code The textual representation of a computer program as it is written by a programmer. Nowadays source is typically in a high-level language like C C or Pascal but inevitably some programmers must work close to the machine in assembly language. The code part of this is presumably an extension of the idea that ultimately all computer programs are executed as machine code or machine language. This consists of numeric values or operation codes opcodes which select the instruction to be executed and so represent a very public code for those instructions. Also see object code. State Information storage or memory. In abstract machine theory retained information generally used to influence future events. In statistics the current symbol from a sequence or a value which selects or conditions possible outcomes see Markov process . We normally measure state in units of information or bits and 8 bits of state can support 28 or 256 different state-value combinations or states. Also see deterministic and keyspace. Stationary Process In statistics a stochastic random process function whose general statistics do not change over time in which every sub-sequence is representative of the whole a homogenous process. This may not be true of a Markov process. Also see ergodic. Statistic A computation or process intended to reduce diverse results into a onedimensional ordering of values for better understanding and comparison. Also the value result of such a computation. See statistics. A useful statistic will have some known or at least explorable probability distribution for the case nothing unusual found. This allows the statistic value to be interpreted as the probability of finding that value or less for the case nothing unusual found. Then if improbable statistic values occur repeatedly and systematically we can infer that something unusual is being found leading to the rejection of the null hypothesis. It is also possible to explore different distributions for the same .