this study is carried out to determine effective risk factors for early death and their causes in those who died due to intra cerebral hemorrhage within 30 days.materials and methods: from patients who have been admitted in neurologic ward of imam khomeini hospital in tabriz, we enrolled 100 patients with intra cerebral hemorrhage and the causes and risk factors effective in early death were ev...

The expectation of a random variable is its average value, where each value is weighted according to the probability that it comes up. The expectation is also called the expected value or the mean of the random variable. For example, suppose we select a student uniformly at random from the class, and let R be the student’s quiz score. Then E [R] is just the class average —the first thing everyo...

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Birth-death processes take place ubiquitously throughout the universe. In general, birth and death rates depend on system size (corresponding to number of products or customers undergoing birth-death process) thus vary every time occurs, which makes fluctuations in inevitable. The differential-difference equation governing evolution such a process is well established, but it resists solving for...