mtbf calculation

 varDef_pi=Math.PI;//3.14159265359varDef_2pi=2*Math.PI;//6.28318530712vardef_pi180=Math.PI/180.0;//0.01745329252varDef_r=6370996.81;//radius of Earth//Using Arc angle method to calculate the distance between two points on the map and inconsistent with the Baidu map calculation resultsfunction getshortdistance(Lon1,LAT1,Lon2,LAT2){varEw1,ns1,Ew2,ns2;varDX,Dy,Dew;varDistance;//Angle converted to radiansEw1=Lon1*def_pi180;NS1=LAT1*def_pi180;Ew2=Lon2*de

2501. Calculation ConstraintsTime limit:1 secs, Memory limit:256 MBDescription_gxx encountered a troublesome equation: S = n1 + N2 + N3 + ... + NK, known as N, K, for the value of S. Because _GXX maths is poor, I hope you can tell him the answer. But because his math is so bad, you just need to tell him to divide the remainder of s by 9901.InputTwo integers, N and K (n≤1000, k≤109).OutputA number that represents the remainder of s divided by 9901.

Python time difference calculation method, python Time Difference Calculation This article describes how to calculate the time difference in python. Share it with you for your reference. The specific analysis is as follows: 1. Problem: How can we calculate the interval of days, weeks, months, and years between two dates given to you? 2. solution: The standard module datetime and third-party package dateutil

parts: exponent and mantissa, such a method of expression will generally lose a certain degree of precision, some floating-point operations will produce a certain error. For example, the binary representation of 2.4 is not exactly 2.4. Instead the nearest binary representation is 2.3999999999999999. The value of a floating-point number is actually computed by a particular mathematical formula. In fact, the Java float can only be used for scientific calculations or engineering calculations, in m

Php simple calculation of page loading time, php Calculation of page loading This example describes how to calculate the page loading time in php. Share it with you for your reference. The specific implementation method is as follows: Simply put the start time in the page header, and the end time at the end of the page to calculate the page loading time $ Start = time (); // put a long operation in heres

C ++ Displacement Calculation and Displacement Calculation Int main () {int a = 3; int B = a Today, I looked at the displacement operation and found that many blog posts calculated the complicated displacement. I wrote a code to find a small rule. I wonder if it was an existing algorithm (or my guess is incorrect ), now, I hope you can provide comments and suggestions. Take the left displacement as an e

[[Nsfilemanager Defaultmanager] removeitematpath: [filedownload creatpath:p. Name] Error:nil]; Remove from Table[self. Receivearry removeobjectatindex: Indexpath.row]; [_tableview deleterowsatindexpaths:@[indexpath] withrowanimation: Uitableviewrowanimationautomatic]; Remove the file from the local technology directly by using the File Manager directly delete,,,,,,,, Delete the contents of the cell must first delete the contents of the source array, and then delete the cor

Relational calculation methods of the Set, and relational calculation methods of the Set A = [4, 5, 6, 7, 8]A = set ()# A. add ('adfaaaa') # add as only one element# A. update ([121212]) # It must be an iterative object to add# Print ()B = {1, 2, 3, 4, 5}# Print the total elements at the intersection of the SetPrint (a. intersection (B) # method 1Print (a B) # method 2 {4, 5} # Print out all the elements o

Java date comparison, date calculation, and java date comparison Calculation They are common comparison methods between dates for future reference. Warm-up: Get the current time SimpleDateFormat df = new SimpleDateFormat ("yyyy-MM-dd HH: mm: ss"); // you can specify the date format.String nowDate = df. format (new Date (); // new Date () is used to obtain the current system time. Note: The landlord always t

Date and common time calculation in php, and date calculation in php It was used in projects until today, yesterday, this week, this month, this quarter, this year, last week, last quarter, and so on, therefore, we plan to summarize and learn related time knowledge points of php. 1. Read the date function in the php manual. Common time functions: Checkdate () to verify whether a time is correct Date_default

Python implements the reciprocal calculation method, and python implements reciprocal calculation. This example describes how to calculate the countdown in python. Share it with you for your reference. The details are as follows: class Expr: def __add__(self, other): return Plus(self, other) def __mul__(self, other): return Times(self, other) class Int(Expr): def __init__(self, n): self.n = n def

JS handles some simple calculation questions and JS handles simple calculation questions Let's first look at the effect after running: Next we will share with you all the code: The JS Code and style can be flexibly changed when needed. Thank you for your support for the help house.

generateverify Code (int verifysize) {return Generateverifycode (verifysize, verify_codes);} /** * Generate verification code using the specified source * * @param verifysize * CAPTCHA length * @param sources * Verification code word mnemonic * @return */public static String Generateverifycode (int verifysize, string Sources) {if (sources = = NULL | | sources.length () = = 0) {sources = Verify_codes;} int codeslen = Sources.length (); Random rand = new Random (System.currenttimemillis ()); Stri

date parameter is a DATE value and your calculation only contains the YEAR, MONTH, and DAY sections (that is, there is no time section), the result is a DATE value. Otherwise, the result is a DATETIME value. Mysql> SELECT "23:59:59" + INTERVAL 1 SECOND;-> 00:00:00 Mysql> select interval 1 DAY + "1997-12-31 "; -> 1998-01-01 Mysql> SELECT "1998-01-01"-INTERVAL 1 SECOND; -> 1997-12-31 23:59:59 Mysql> SELECTDATE_ADD("23:59:59", INTERVAL 1 SECOND ); -> 00

. 　　Second, bookmark calculation 1. Insert the Formula field. Switch to the Insert tab, click the field button, and select "Formula" in the pop-up window. Then, after the "=" in the field Code text box, type "one + two + three + four + five" (add up the bookmark for each question score), and the last field code is "= one + two + three + four + five". 2. Change the score. Double-click the Text form field, in the pop-up window

Label:blog Use osioar 2014ctilog Nearby people calculation method drop function if exists getdistance;delimiter $$ CREATE definer= ' root ' @ ' localhost ' function ' Getdistance ' ( lon1 float (10,7) , lat1 float (10,7) , Lon2 float (10,7) , Lat2 float (10,7)) RETURNS Doublebegin declare d double; declare radius int; Set radius = 6378140; #假设地球为正球形 with a diameter of 6378140 m Set d = (2*atan2 (SQRT (SIN (LAT1-LAT2) *pi (

Fun Bash Script: numerical calculation, bash script Numerical Calculation 6th articles The mathematical operations in Bash are not as simple as other languages, because Bash treats all variables as strings, so a = 1 + 2, a is not equal to 3, but equal to string 1 + 2. There are several solutions to solve this problem.OPERATOR [] a=2b=3c=$[a+b]d=$[a-b]e=$[a*b]f=$[a/b]g=$[a%b] $ Is only the meaning of the

Characteristics: Strong data correlation; Often exhibit poorer memory access locality Too little processing for a single vertex Along with the change of parallelism in the calculation process Large graph calculation mainly includes two kinds: A real-time graph database based on traversal algorithm, such as NEO4J, Orientdb, Dex and Infinite graph; Based on the vertex-centric parallel engine, such as G

Calculation attribute of Vue. js tutorial, calculation of vue. js tutorial The Inline expression of Vue. js is very convenient, but its most suitable use scenario is simple Boolean operations or String concatenation. If more complex logic is involved, you should use the computing attribute. The calculation attribute is used to declare that a value depends on othe

Precision Calculation-big number multiplied by large number, precision calculation by large numberThe algorithm is used to calculate a large number (a number that cannot be expressed by an existing data type) multiplied by a large number (a number that cannot be expressed by an existing data type ). The algorithm is to put every bit of a large number as a character into a character array, and then multiply