gnss accuracy

Original link http://bookshadow.com/weblog/2014/06/10/precision-recall-f-measure/Below is a brief list of several commonly used recommended system evaluation indicators:1. Accuracy rate and Recall rate (Precision Recall) accuracy and recall rates are widely used in the field of information retrieval and statistical classification of two measures to evaluate the quality of the results. The

Two methods:1, collect the signal complete waveform, carries on the calculation:Is it possible to select an analog capture card with a 250ks/s sampling rate to display the required waveform?No! We have not considered measuring accuracy 0.1%!Because the analog signal is continuous, the period of the signal is 1/(22.5K) =44.4us, duty cycle accuracy of 0.1%, the signal resolution of at least 44.4us/1000=44.4ns

In this section, we only consider a feature word selection frame ig (infomation gain ). Two kinds of probability Modeling The first type is called classical probability modeling. That is the accepted one. That is to say, this method considers that the probability of each category can be based on the probability of two classes in the training corpus.ArticleIn my experiment, the number of two classes is equal, so each of them is 1/2. The article serves as a bridge between words and c

Note: This article will not mention the details of the project, but will look at this issue from a general or general perspective .......... Yesterday, the day before yesterday, I went on a business trip and made a small project to help others improve the accuracy of their existing Approximation Formulas... in fact, in practice, the approximate formula is used a lot, because the computer will only perform the +-*/operation, and the essence is only +.

Solution idea: Decimal into an integer before the operation. The specific code is as follows:/*** Addition operation, to avoid the data added after the decimal point to produce multiple digits and the loss of computational accuracy.** @param num1 addend 1 | Num2 Addend 2*/function Numadd (NUM1, num2) {var basenum, BaseNum1, baseNum2;try {BASENUM1 = Num1.tostring (). Split (".") [1].length;} catch (e) {BASENUM1 = 0;}try {baseNum2 = Num2.tostring (). Sp

Multi-index evaluation model ability for MXNET classification model Training (accuracy,cross-entropy,top_k_accuracy)The code is as follows Metric=[mx.metric.create (' acc '), mx.metric.create (' top_k_accuracy ', top_k=3), mx.metric.create (' CE ')] Mod.fit (Train, Val, Num_epoch=num_epoch, arg_params=arg_params, aux_params=aux_params, allow_ Missing=true, batch_end_callback = Mx.callback.Speedom

Many users mistakenly think that the higher the stepper motor driver subdivision, stepper motor precision is higher, in fact, this is a wrong idea, such as stepper motor driver subdivision can reach 60,000 pulses a turn, and stepper motor is not really able to distinguish this accuracy, when the drive set to 60,000 pulses/rpm , the stepper motor driver accepts several pulses and the stepper motor takes one step, which does not improve the precision of

Spring MVC supports rest from 3.0, mainly through @pathvariable to handle the mapping of request parameters and paths.Due to the reasons for the SEO, many people like the name of the news as part of the path to deal with, when the Chinese name will encounter problems, no way to map, this is because of coding problems, as long as the tomcat/conf to find Server.xml, add uriencoding= " UTF-8 "The URL encoding setting will solve the Chinese problem.Also often encountered in the path a little ".", an

floating-point numbers can occur in many places, such as D * g/g not necessarily equal to d,d/g * g or not necessarily equal to D.There are two very dangerous mistakes to know!!1, decimal is not a floating-point type, decimal does not exist precision loss.Here are some procedures you can go to see what the results are. Remember! All floating-point variables have the problem of precision loss, and decimal is a no-no floating-point type, no matter how high precision, precision loss still exists!d

numbers #string Bcmul (String $left _operand, String $right _operand [, int $scale]) #$scale the number of decimal places defaults to 0 #the quadratic value of two high-precision numbers #string Bcpow (String $left _operand, String $right _operand [, int $scale]) #$scale the number of decimal places defaults to 0 #to find the square root of high precision number #string Bcsqrt (string $operand [, int $scale]) #$scale the number of decimal places defaults to 0 #set the number of decima

. floatvalue (), of course, is still because of the loss of precision. Of course, if your decimal point is no more than 5 digits, it is also possible. If it is more than 5 digits, it is related to the value of the fifth digit (because it only keeps the five decimal places). If the fifth digit is greater than or equal to five, even if the sixth digit is zero, it will add one to the fifth digit, otherwise, the following will only be intercepted! Speaking of this, I suddenly think of the ending nu

Question: How many types of inbound and outbound requests are allowed. Classic catlan. My current knowledge of catlan is the number of methods in which N numbers 1 and N-1 form a 2n series. This is similar to that of the train station, Baidu has explained the specific catlan numbers in detail. Code 1 (c ): /*h(n) = h(n-1)*(4*n-2)/(n+1);*/#include Code 2 (Java ): /* * hdoj 1023 train problem II */import java.util.Scanner;import java.math.*;public class Main{ public static void main(String[

cutting is a process CO2 laser engraver that is used to cut steel and other metals of different thicknesses using a plasma torch. engineers describe plasma as the fourth state of matter.Tags: civil contractor sysydney, civil contractors NSW, level 1 ASP, tips from your reliable engine repair shop in Frisco TX-Christian Brothers automotive: rovie Smith | Oct 23rd 2013-do you know that one of the issues which your auto may have, the most quite frustrating is dealing with the engine trouble. there

Starting from 1Const intn= -;Const intB=1e4,l= -;structbig{intSize,d[l]; Big (intA=1): Size (a) {memset (d,0,sizeof(int)*L);}};voidJia (Big a,big b) { intg=0, I; for(i=1;; i++){ if(g==0i>a.sizei>b.size) Break; inttmp=G; if(iA.d[i]; if(iB.d[i]; A.d[i]=tmp%C; G=tmp/C; } a.size=i-1;}voidCheng (Big a,big b,big c) { for(intI=1; i){ intg=0; for(intj=1; j) {C.d[i+j-1]+=a.d[i]*b.d[j]+G; G=c.d[i+j-1]/B; C.d[i+j-1]%=B; } c.d[i+b.size]=G; } c.size=a.size+b.size; while(c.d[c.size]==0

approximate operation of some approximate values, rather than an exact operation in the previous arithmetic operation. Because of its nature and general situation, real-time floating-point data is only an approximate representation of the real number, which means that real-time floating-point operations are only an approximate operation. In this topic, the accuracy of the approximation is very high, and the calculation result is exactly the same as t

Java float addition and subtraction accuracy can be converted to bigdecimal when this field is obtained, while bigdecimal can be set. Float M = 12.22f; float c = 1.22f; bigdecimal b1 = new bigdecimal (float. tostring (m); bigdecimal b2 = new bigdecimal (float. tostring (c); system. out. println (m); system. out. println (c); float add = b1.add (B2 ). floatvalue (); system. out. println ("add =" + Add); float less = b1.subtract (B2 ). floatvalue (); sy

MATLAB provides a wide range of data types (you can find detailed descriptions of MATLAB data types). The default data type is double. However, sometimes there may be situations where the data type is not accurate enough. For example, when calculating the slope and counting down, there may often be a phenomenon where the difference is a thousand miles. Therefore, the precision of existing data types needs to be improved. MATLAB provides a function VPA that allows you to customize data precision.

Use doscommand to check the accuracy of qqip 100% Is it so troublesome to query the IP addresses of QQ friends? Just patch QQ? Yes. This is simple, but what should I do if it's a new QQ and "patch? Using software such as ipsniper, what should I do if I am not in a hurry to check it? You can use other software, such ...... Well, I want to talk about other people's software. Why don't I try the doscommand? It is simple, convenient, and environmentall

number of field = max (field) the value has not been displayed, so it is ruthlessly> dropped. By the way, let's take a look at the CTE (common table expression) method of SQL server2005. The CTE method is not accurate. It should be said that the row_number function is better.With t (Select row_number () over (order by field) as rownum, * from table) Select * from t where rownum .....The CTE improvement method also requires the existence of unique fields such as ID.With t (Select row_number () o

First posted a URL, feel written in very detailed, it seems that the principle of analysis, but did not see how, as if not to say how to solve ...http://justjavac.iteye.com/blog/1864938Phenomenon:0.56 * - //56.00000000000001 0.56 * Ten //5.6000000000000005 0.57 * Ten //5.699999999999999 5.6 / Ten //0.5599999999999999This is true for all browsers including IE6Scene appearsNeed to show 0.56 as 56%, then incredibly 56%, no words.Solve:Seems normal:0.57*1000/10But the problem remains:0.5757 * + /