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3 years ago

Bonjour ma question est: expliquer comment fonctionne une calculatrice qui ne contient pas une pile. Pouvez-vous m'aider?

Computers and Technology

1 answer:

larisa [96]3 years ago

6 0

Answer:

Tout calculateur électronique ou numérique nécessite une source d'alimentation pour fonctionner, avec son circuit configuré à la porte logique requise liée aux touches d'entrée et à l'écran de sortie.

Explanation:

Les calculatrices sont des appareils utilisés pour les calculs arithmétiques. Au 19ème siècle, les calculatrices étaient mécaniques et n'utilisaient pas de batterie, elles étaient encombrantes et utilisaient des tiges et des engrenages dans leur fonctionnement. Les calculatrices récentes sont électroniques, alimentées par une batterie. Ils comprennent un circuit électronique configuré à sa porte logique requise pour le calcul, un bouton pour l'entrée et un écran pour la sortie du calcul.

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3 years ago

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Arisa [49]

Answer:

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Explanation:

Lasso: R example

To run Lasso Regression you can re-use the glmnet() function, but with the alpha parameter set to 1.

# Perform 10-fold cross-validation to select lambda --------------------------- lambdas_to_try <- 10^seq(-3, 5, length.out = 100) # Setting alpha = 1 implements lasso regression lasso_cv <- cv.glmnet(X, y, alpha = 1, lambda = lambdas_to_try, standardize = TRUE, nfolds = 10) # Plot cross-validation results plot(lasso_cv)

Best cross-validated lambda lambda_cv <- lasso_cv$lambda.min # Fit final model, get its sum of squared residuals and multiple R-squared model_cv <- glmnet(X, y, alpha = 1, lambda = lambda_cv, standardize = TRUE) y_hat_cv <- predict(model_cv, X) ssr_cv <- t(y - y_hat_cv) %*% (y - y_hat_cv) rsq_lasso_cv <- cor(y, y_hat_cv)^2 # See how increasing lambda shrinks the coefficients -------------------------- # Each line shows coefficients for one variables, for different lambdas. # The higher the lambda, the more the coefficients are shrinked towards zero. res <- glmnet(X, y, alpha = 1, lambda = lambdas_to_try, standardize = FALSE) plot(res, xvar = "lambda") legend("bottomright", lwd = 1, col = 1:6, legend = colnames(X), cex = .7)

Kindly check the Image below.

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3 years ago

In what software development model does activity progress in a lock-step sequential process where no phase begins until the prev

den301095 [7]

Answer:

"Waterfall" is the correct answer for the above question.

Explanation:

The Waterfall model is a model which is the first model recognized by some scientists is used to states some rules to develop the software. It is based on the phases of the SDLC. The SDLC is the collection of phase that is used in software development.
The waterfall model moves like water moves. It means any next phase starts if the previous phase is completed and the user can not move into previous steps of the model.
This is also asked by the question. Hence the answer is the waterfall model.

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3 years ago

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vazorg [7]

A is the correct Answer

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4 years ago

Develop a CPP program to test is an array conforms heap ordered binary tree. This program read data from cin (console) and gives

mafiozo [28]

Answer:

Following are the code to this question:

#include<iostream>//import header file

using namespace std;

int main()//defining main method

{

int ar[7];//defining 1_D array that stores value

int i,x=0,l1=1,j; //defining integer variable

for(i=0;i<7;i++)//defining for loop for input value from user ends

{

cout<<"Enter a Number: ";//print message

cin>>ar[i];//input value in array

if(l1<=2 && i>0)//using if block that checks the array values

{

x++;//increment the value of x by 1

}

if(l1>2 && i>0)//using if block that checks the array values

{

l1=l1-2;//using l1 variable that decrases the l1 value by 2

}

j=i-x;//using j variable that holds the index of the root of the subtree

if(i>0 && ar[j]>ar[i])// use if block that checks heap condition

{

l1++; //increment the value of l1 variable

}

if(i>0 && ar[j]<ar[i])// using the if block that violate the heap rule

{

cout<<ar[i]<<" "<<"Violate the heap";//print message with value

break;//using break keyword

}

return 0;

}

Output:

Enter a Number: -15

Enter a Number: -5

-5 Violate the heap

Enter a Number: 45

Enter a Number: 0

Enter a Number: 55

55 Violate the heap

Explanation:

In the above-given C++ language code, an array "ar" and other integer variables " i,x,l1, j" is declared, in which "i" variable used in the loop for input values from the user end.
In this loop two, if block is defined, that checks the array values and in the first, if the block it will increment the value of x, and in the second if the block, it will decrease the l1 value by 2.
In the next step, j variable is used that is the index of the root of the subtree. In the next step, another if block is used, that checks heap condition, that increment the value of l1 variable. In the, if block it violate the heap rule and print its values.

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3 years ago