heart rate data logger

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returning to the battlefield of that year.Maintain a hashmap, key is a message, value is the timestamp of the messageThe message that is not present is added to HashMap, and return True.There are no more than 10 message return false.A message that appears and exceeds 10, with the new HashMap, return True.Time Complexity:shouldprintmessage O (1).The size of the space:hashmap.AC Java:1 Public classLogger {2 3 /**Initialize your data structure here

1 Public classLogger {2 PrivateMapdata;3 /**Initialize your data structure here.*/4 PublicLogger () {5data =NewHashmap();6 }7 8 /**Returns True if the message should is printed in the given timestamp, otherwise Returns false.9 If This method returns false, the message won't be printed.Ten The timestamp is in seconds granularity.*/ One Public BooleanShouldprintmessage (inttimestamp, String message) { A if(!data.co

If the sampling rate of the ECG machine is 1000, that is, 1000 data is sampled every second, how can we calculate the heart rate based on the sampled data? Computing the heart rate with

The complete question made in nelvt is the automatic detection technology and application of human physiological indicators based on the camera. Simply put, the heart rate is measured by the camera.Introduction The goal is mainly for non-contact measurement, based on the medical photolethysmography (PPG) technology. PPG is a non-invasive method for detecting blood volume changes in living tissue by photoel

Http://archive.ics.uci.edu/ml/machine-learning-databases/statlog/heart/ This data is often used as an example of data mining. This database contains 13 attributes (which have been extracted fromA larger set of 75) Attribute Information:-------------------------- 1. Age-- 2. Sex gender-- 3. Chest pain type (4 values) chest pain type-- 4. resting blood pressure s