The accuracy rate, recall rate, and F value are important evaluation indicators of the target in a mixed environment. In this paper, these three indicators are favored.
Let's take a look at the definition of these indicators first:
Accuracy Rate = Total number of correctly recognized individuals/total number of identified individuals
Recall rate = Total number of correctly recognized individuals/total number of individuals in the test set
F value = accuracy * recall rate * 2/(accuracy rate +
the user experience, should study the user's information search behavior, and then set the information matching way, today mainly said the user's information search behavior, the website information matching way continues to pay attention to.
What kind of information needs do users have?
As a child, the teacher often told us the story of monkeys breaking corn, said a monkey down the mountain saw a large area of corn, broke a corn hold in the bosom, continue to go before, and saw the watermelo
This time we have some very small things, rather small. But first tell a story:This evening, you plan to go out to the next restaurant, to move, to find a new shop to sit down, the waiter very attentive to come over and ask you want to eat something.You ask, "Do you have anything good to eat?" ”A: We have soybean and edible Colony Group Brewing agent and Carassius auratus common high-temperature heating products; soybean protein by magnesium chloride, calcium sulfate, chloride and sodium chlorid
of precision and recall, and b>1 indicates more emphasis on p
E =1-(b^2 + 1)/(1/p + b^2/r)
=1-(b^2+1) *p*r/b^2*p +r)
Example: There are 1400 carp, 300 shrimp and 300 turtles in a pond. Now for the purpose of catching carp. Sprinkle a big net, caught 700 carp, 200 shrimp, 100 turtle. So, these indicators are as follows:
Accuracy = 700/(700 + 200 + 100) = 70%
what kind of monkeys? Do they know what information they are looking for?The general website will be the user's search behavior is divided into four kinds: deterministic search, exploratory search, no omission of search, repetitive search.Deterministic SearchWhat is a deterministic search? Give me an example of life, this weekend I want to go to the market to buy a carp home braised, crucian carp is I go t
, Tibetan fragrance, pig breast milk, acid lure and so onLiquid and powder-like small drug in the use of the difference, first, the liquid small drug in addition to medicinal wine, generally diluted with water, add the amount of general control in the 3%--5% effect the best! Powder-like small medicine, general purity is too high, the amount to be small and liquid, generally 0.5%--2% small drugs are generally extracted from high-purity spices, most of them imported, for example, we often use the
The correct rate, recall rate and F value are the important evaluation indexes of the target in the mixed environment.Consider the definition of these indicators first:Correct rate = number of individuals correctly identified/number of individuals identifiedRecall rate = Number of individuals correctly identified/total number of individuals present in the test setF value = correct rate * Recall rate * 2/(correct rate + recall rate)Example: There are 1400 car
:
1. Correct rate = The correct number of messages extracted/the number of extracted information bars
2. Recall rate = The correct number of information to be extracted/the number of information bars in the sample
The two values are between 0 and 1, the closer the value is to 1, the higher the precision or recall.
3. F value = correct rate * Recall rate * 2/(correct rate + recall rate) (f value is the harmonic mean of correct rate and recall rate)
Example: There are 1400
between 0 and 1, the closer the value is to 1, the higher the precision or recall.3. F value = correct rate * Recall rate * 2/(correct rate + recall rate) (f value is the harmonic mean of correct rate and recall rate)Example: There are 1400 carp, 300 shrimp and 300 turtles in a pond. Now for the purpose of catching carp. Sprinkle a big net, caught 700 carp, 200
and celery are also taboo.Egg eggs have different nests, and both of them have a stomachache.The opposite of carp licorice, and the fixed injury.All the eggs of the eel are good food and cannot be accompanied at the same table.If the eggs are infected with Xiaoyan tablets, they will compete with each other.Egg saccharin is more gram, same food poisoning is more hurt.If the persimmon sweet potato is eaten together, stones are easily formed in the body
and 1, the closer the value is to 1, the higher the precision or recall.
3. F = correct rate * Recall rate * 2/(correct rate + recall rate) (f value is the correct rate and recall rate of the harmonic mean)
Take this example: there are 1400 carp, 300 shrimp and 300 turtles in a pond. It is now for the purpose of catching carp. 700 Carp, 200 shrimp and 100 tur
numerical statistics. We only record the approximate funding situation and, according to this plan, the cost of opening the fund this month exceeds our expectation. For example, I bought 10 steamed stuffed buns in the morning. The price of the steamed stuffed buns is 1 yuan, 20 steamed stuffed buns are eaten at noon, and 20 steamed
composed of various classes. A class is used in many places in a project.
If the traditional method is usednew Class()If the parameters are complexnew Class(param1, param2, param3, ..)At this time, each time you modify the class constructor, You need to modify it everywhere. Large workload and high coupling.
However, you can initialize the classes to be used and store them in a container,You only need to call the container MethodContainer->getClassINeed()Then, use this class and generate th
mad at me sometimes for no good reason. But ifI ever need it, I know he wowould give me the shirt off his back.
My father sometimes gets angry with me. However, as long as I need it, he will always do his best to help me.
Another example is: Pete never says very much. But when he hears about somebody who'sSick in the hospital or lost his job, he's always the first to put hisHand in his pocket and bring out money to help. Yes, sir, he's the kindOf man who 'd give you the shirt off his back.
Pete
I eat one or two bowls of minced meat? Yi Qianyi Jie Huang Yu, Zheng Huan Yu, reef, and Disease Insurance Officer, Zhu Huan, Huai YuTakeo likes and hooks yuanhuang Takeo zhizsi θ stealing Jiao Takeo yuetao yuexiao Yuanxiao muxian Mushi Yuanxiao zookeeperYou can easily call the ossclient, and then use a string to call the ossclient? Disk game ......
One dollar in Guilin --
What can I do for a dollar? I need 1 piece of rice flour for two reasons; 2 for a bus without air conditioning; 2 for a stea
Dragon Boat Festival joke 1. When the Dragon Boat Festival arrived, the administrative department of the company sent a basket of dumplings to each foreign employee. The next day, a foreign employee called the administrative department to express his gratitude: "The thing you sent is delicious, although the lettuce outside is a little hard."
2. Everyone watched the Dragon Boat Race and burned wheat into the water. Zongzi did not want to take off his clothes and jumped down to save the trouble. A
) {Adding custom propertiesErr.location = Location.href + ', function:foo () ';Logger.log (ERR);Warnuser ();}}function Warnuser () {Alert ("An error has occurred while processing this page.") + "Our engineers have been alerted!");Location.href = '/path/to/error/page.html ';}Now that you know how to integrate a logger into an HTML page, the rest of the work is to define a way to receive and convert messages. I chose to use the lowest common naming method, creating a CGI script in Perl that used s
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will make the system look complicated, unfriendly to the novice, not a certain abstraction of the design ability is difficult to understand.
Usage scenarios:
There are two independently varying dimensions for a class, and these two dimensions need to be expanded.
Other music recommendations
NetEase Cloud Netizen Evaluation (PS: The original can not generate outside the chain, recommended to listen to the original):
Hibiscus painter Shallow Brook, living in Taian, X
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In the previous article ASP. NET: I like Web Form, but I like drag controls (2). Some comments mentioned that how did Lao Zhao run with steamed stuffed bun dumplings? Let's take a closer look. The tables listed in this way do ha
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