mtbf calculation

Disk IOPS concept and IOPS calculation and test http://ce.sysu.edu.cn/hope/Item.aspx?id=12630 echo "The SYSTEM Metric of the" last $start days to $end days: "Sqlplus-s "/As SYSDBA" Set Lines 180Set pages 70Alter session set nls_date_format= ' Mm-dd hh24:mi:ss ';Col phyread_total_mbps heading "phyr| MBps format 999.99Col phywrite_total_mbps heading "phyw| MBps format 999.99Col redo_mbps heading "redo| MBps Format 99.99Col phyread_iops heading "phyr| I

problem: Multithreading calculation 1+2+...+100, such as: up to four threads, calculate 1+2+ respectively. 25, 26+27+...+50, 51+52+...+75, 76+77+ ... 100, finally the sum is related, the output should be 5050Workaround: Call Thread.Join () in turn, and the main thread outputs the result. Note: Sum is a shared variable, when you access a shared variable, use synchronized to synchronize the Countdownlatch, and the child thread finishes calling Countdown

A overview of the overall 1. The concept of flow computing Core: Large-scale flow data are analyzed in real time during the changing motion, capturing the possible useful information and sending the result to the next computing node; 2. Application scenario for flow calculation: Flow operations in terms of content, the demand for faster operation and analysis of data in financial and scientific calculations, and for rapid processing and feedback o

example uses the DateDiff and DATEADD functions to get a midnight point.　　SELECT DATEADD (DD, DATEDIFF (Dd,0,getdate ()), 0)　　Deep DateDiff and DateAdd function calculation　　You can see that by using simple DateDiff and DateAdd function calculations, you can find many different dates that may be meaningful.　　 All the examples so far are just calculating the current time and the number of time intervals between "1900-01-01" and then adding it to the "

$strlen; Results: 17 ?> Principle Analysis: strlen () calculation, the length of the UTF-8 is 3, so the "three-knowledge sunchis development Network" is the length of 5x3+7x1=22 In Mb_strlen calculations, when the selected inner code is UTF8, a Chinese character is computed as a length, so the "three-knowledge sunchis development Network" length is 5x1+7x1=12 The rest is pure maths problem, here is not verbose ... Note:For Mb_strlen (

? Php /* CREATE TABLE ' Db_online ' ( ' IP ' char ' default NULL, ' Time ' char ' is not NULL default ', ' Name ' char ' not NULL default ' visitor ' ) Type=myisam */ Rough calculation of online time, bug:ip the same (LAN-> external network), only record one person. But the odds are low. Session_Start (); Timeout time $out _time=300;//60*5 $UESR _name=$_session[' Uesr_name ']; $now =time (); $online = "Db_online"; $ip =$_server["REMOTE_ADDR"];

Copy Code code as follows: ' Chinese name Stroke calculation (VBS script version) Dim Word,key Word=inputbox ("Please enter the text you want to calculate") If word= "" Then MsgBox "The demo is not to say you don't enter text?" Wscript.Quit End If Key=char_wordnum (Word) MsgBox Key Function Char_wordnum (My_char_word) Dim char_wordtable (num), Wordnum_i,wordnum_j,wordnum_k,temp_wordnum Temp_wordnum= "" If my_char_word= "" Then Char_w

Add a affiliate points project in. It took a turn. First, add in the configuration file code is as follows copy code * * * * * * * * * * The class under totals is modeled under model classes that must inherit from Mage_sales_model_quote_address_total_abstract, and Nominal_ The class under totals must inherit the class under totals. The class under totals to implement 2 methods The code is as follows Copy Co

Time Format Date.prototype.Format = function (fmt) {var o = {"m+": This.getmonth () + 1, "d+": THIS.GETDA Te (), "h+": this.gethours (), "m+": This.getminutes (), "s+": This.getseconds (), "q+": Math. Floor ((This.getmonth () + 3)/3), "S": This.getmilliseconds ()}; if (/(y+)/.test (FMT)) FMT = Fmt.replace (regexp.$1, (this.getfullyear () + ""). substr (4-regexp.$1.length)); For (var k in O) if (new RegExp ("+ K +")). Test (FMT)) FMT = Fmt.replace (regexp.$1, (regexp.$1.length = 1)? (

Reference 1 PASCAL VOC, starting with the 2007, uses interpolated method to compute map The reason for the low Coco map Coco Data Set Result evaluation SSD Calculation map Faster R-CNN Computing Map Coco Data Annotation content, Bbox is [x,y,width,height] Draw PR Curve When using COCOAPI, make an error according to request Gcc:fatal error:-fuse-linker-plugin, but liblto_plugin.so not found Refer to similar issues under Windows to find the

[MATLAB] numerical calculation of differential equation sets We use the ode45 function When we cannot use dsolve to do symbolic solving. The function prototype is [T,y] = Ode45 (odefun,tspan,y0) Example [t,y] = Ode45 (odefun,tspan,y0,options) Example [T,y,te,ye,ie] = Ode45 ( odefun,tspan,y0,options) sol = ode45 (___) Write the function file first. m as the first parameter of the Ode45 Odefun Function y = Fun (t,x,flag,k) %flag are a [] to mark t

,round (SUM (bytes_used)/(1024*1024), 2) Used_space, Round (sum (bytes_free)/(1024*1024), 2) free_space From V$temp_space_header GROUP by Tablespace_name) F where D.tablespace_name = F.tablespace_name (+) --undo table Space SELECT Seg.tablespace_name "tablespace name", ts.bytes/1024/1024 "TS Size (MB)", Ue.status "UNDO status", COUNT (*) "Used extents", Round (sum (ue.bytes)/1024/1024, 2) "Used Size (MB)", Round (sum (ue.bytes)/ts.bytes*100, 2) "Used Rate (%)" From Dba_segments SEG,

Gunnar Farnebak algorithm for dense optical flow calculation Computes a dense optical flow using the Gunnar farneback ' s algorithm. Using Gunnar Farnebak algorithm to compute dense optical flow C + +: void Calcopticalflowfarneback (Inputarray prev, Inputarray next , Inputoutputarray flow, double pyr_scale, int levels, int winsize, int it Erations, int poly_n, double poly_sigma, int flags ) Example: #include "opencv2/video/tracking.hpp" #include "

1137 Calculation factor 2011 NOIP National League Increase group time limit: 1 s Space limit: 128000 KB Title level: Gold Gold Title Description Descripti On Given a polynomial (ax + by) ^k, the coefficients of x^n y^m items are requested after the expansion of the polynomial. The Input description input Description contains a total of 5 integers, each of which is a,b,k,n,m, separated by a space between each of the two integers. The Output d

There is such a topic: Recursive functions: 1 int x (int n) 2 { 3 if (n Calculates the number of recursive invocations of X (x (8)). Most probably think it's a very simple topic, and it's really simple. But it takes a bit of patience to figure out the recursive call count correctly without a compiler. X (x (8)) We first calculate X (8), we count the number of recursive calls with count=0 1.x (8) =x (6) +x (4) +1 count=1; 2.x (6) =x (4) +x (2) +1,x (4) =x (2) +x (0) +1 x (8) =x (4) +2*x (2

, then these variable variables are automatically placed in the Graphkey.trainable_variables list of the TensorFlow system: Defaults to the list of variables collected in the graph under the key ' Graphkey.trainable_variables '. After the continuous optimization of the objective function, these variables are updated by the new gradient during the gradient calculation, and the target of the weight coefficient update is achieved. Step Two: Cross_entrop

When we study the finite element course, we do another job, solve a simple finite element problem with C/C + + programming, as a programming example of finite element learning, to better understand the finite element theory, and to lay the foundation for the further use of large finite element software. The basic theory of finite element in this paper refer to the finite element method in fluid mechanics (Zhang Benzha), which is pp.156-165 by Mr. One or two-dimensional heat transfer problem As

------------------------------------------Create a method----------------------------------------------------------------------@LatBegin latitude A (33.8703596)----@LngBegin Longitude A ( -117.9242966)----@LatEnd latitude B (34.0392283)----@LngEnd Longitude B ( -117.8367681)--CREATE FUNCTION [dbo].[fngetdistance](@LatBegin REAL,@LngBegin REAL,@LatEnd REAL,@LngEnd REAL)RETURNS FLOAT as BEGIN --distance (km) DECLARE @Distance REAL --distance (miles)-- DECLARE @Edistance REAL DECLARE @EAR

between two coordinate points (longitude, latitude) on the earth SQL function--lordbaby--: www.aspbc.comCREATEFUNCTION [dbo]. [Fngetdistance] (@LatBeginREAL,@LngBeginREAL,@LatEndREAL,@LngEndREAL)RETURNSFLOATAsBEGIN-distance (km)DECLARE@DistanceREALDECLARE@EARTH_RADIUSREALSET@EARTH_RADIUS =6378.137DECLARE@RadLatBeginREAL,@RadLatEndREAL,@RadLatDiffREAL,@RadLngDiffREALSET@RadLatBegin =@LatBegin*PI ()/180.0SET@RadLatEnd =@LatEnd*PI ()/180.0SET@RadLatDiff =@RadLatBegin-@RadLatEndSET@RadLngDiff =@Lng

equal to 4 The day is the first week of the year, plus the last days of the previous year. --The start time and end time (IW) for week Count week from Monday to Sunday (IWS) Natural Week with PARAMS as (SELECT TRUNC (to_date (' 2009-01-01 ', ' yyyy-mm-dd '), ' YYYY ') as SD from DUAL ) SELECT Level Week, DECODE (5-decode (To_char (PM. SD, ' D '), ' 1 ', ' 7 ', To_char (PM. SD, ' D ')), -1,next_day (PM. Sd+ (LEVEL-1) *7,2), Next_day (PM. Sd+ (LEVEL-1) *7-7,2) on the first day of the week, DECODE