101 quantum chemistry, how to start
The liquid-cooled Tensor Processing Units, built to slot into server racks, can deliver up to 100 petaflops of compute.
The liquid-cooled Tensor Processing Units, built to slot into server racks, can deliver up to 100 petaflops of compute.
As the world is gearing towards more automation and AI, the need for quantum computing has also grown exponentially. Quantum computing lies at the intersection of quantum physics and high-end computer technology, and in more than one way, hold the key to our AI-driven future.
Quantum computing requires state-of-the-art tools to perform high-end computing. This is where TPUs come in handy. TPUs or Tensor Processing Units are custom-built ASICs (Application Specific Integrated Circuits) to execute machine learning tasks efficiently. TPUs are specific hardware developed by Google for neural network machine learning, specially customised to Google’s Machine Learning software, Tensorflow.
The liquid-cooled Tensor Processing units, built to slot into server racks, can deliver up to 100 petaflops of compute. It powers Google products like Google Search, Gmail, Google Photos and Google Cloud AI APIs.
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Many people are looking to quantum computing as the next revolutionary technology. Nature analyzed that in 2017 and 2018 alone, more than $450 million of private funding was poured into the quantum industry. Even the classical finance community starts to smell an opportunity. Xavier Rolet, the former CEO of the London Stock Exchange and well-respected industry veteran, told The Quantum Daily that he considers such investments a solid bet on the future and believes in the transformational change of quantum computers.
If not all, the exciting topic made its way to a more mainstream audience. Even the tabloids have been writing extensively and with very catchy headlines about a Nature article published in 2019. Researchers at Google announced that they achieved what is called quantum supremacy. On their quantum processor named Sycamore (see Fig. 1), they ran some calculations within 200 seconds that would have taken the world’s most powerful (classical) supercomputer 10,000 years — at least they claim. It has to be added that the setup was very specific and the results are heavily debated by competitor IBM. But certainly, the expectation towards the field has been starting to skyrocket.
As smart and quirky physicists move towards the field of quantum computation, build hyped startups and get huge funding, it is very interesting to follow this space. Will we have the chance to see disruptive innovation live and in action?
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Recently, D-Wave Systems announced the general availability of its next-generation quantum computing platform through Leap quantum cloud service. The platform incorporates new hardware, software, and tools to enable and accelerate the delivery of in-production quantum computing applications.
Leap quantum cloud service includes the Advantage quantum system, with more than 5000 qubits and 15-way qubit connectivity, in addition to an expanded hybrid solver service that can run problems with up to one million variables.
According to reports, the combination of the computing power of Advantage and the scale to address real-world problems with the hybrid solver service in Leap enables businesses to run performant, real-time, hybrid quantum applications for the first time.
As part of its commitment to enabling businesses to build in-production quantum applications, the company announced D-Wave Launch, which is a jump-start program for businesses who want to get started building hybrid quantum applications today but may need additional support.
The company also announced a new hybrid solver, known as the discrete quadratic model (DQM) solver. It provides developers as well as businesses the ability to apply the benefits of hybrid quantum computing to new problem classes.
#news #5000 qubits #d-wave #d-wave expands its quantum cloud service to india #leap quantum cloud service #quantum cloud computing #quantum cloud service
Sometime in the 1970s, the computing world hit its first major breakthrough - Dennis Ritchie and Ken Thompson at AT&T Bell Laboratories founded the Holy Grail of C programming. It took another 50 years for programmers to achieve a milestone of similar force - a language that brought a comparable level of simplicity and functions to quantum computing.
Introducing Silq - “A new high-level programming language for quantum computing with a strong static type system”- the first and only one of its kind!
#quantum computing #artificial intelligence #programming language #silq #quantum-computers
The final objective is to estimate the cost of a certain house in a Boston suburb. In 1970, the Boston Standard Metropolitan Statistical Area provided the information. To examine and modify the data, we will use several techniques such as data pre-processing and feature engineering. After that, we'll apply a statistical model like regression model to anticipate and monitor the real estate market.
Before using a statistical model, the EDA is a good step to go through in order to:
# Import the libraries #Dataframe/Numerical libraries import pandas as pd import numpy as np #Data visualization import plotly.express as px import matplotlib import matplotlib.pyplot as plt import seaborn as sns #Machine learning model from sklearn.linear_model import LinearRegression
#Reading the data path='./housing.csv' housing_df=pd.read_csv(path,header=None,delim_whitespace=True)
Crime: It refers to a town's per capita crime rate.
ZN: It is the percentage of residential land allocated for 25,000 square feet.
Indus: The amount of non-retail business lands per town is referred to as the indus.
CHAS: CHAS denotes whether or not the land is surrounded by a river.
NOX: The NOX stands for nitric oxide content (part per 10m)
RM: The average number of rooms per home is referred to as RM.
AGE: The percentage of owner-occupied housing built before 1940 is referred to as AGE.
DIS: Weighted distance to five Boston employment centers are referred to as dis.
RAD: Accessibility to radial highways index
TAX: The TAX columns denote the rate of full-value property taxes per $10,000 dollars.
B: B=1000(Bk — 0.63)2 is the outcome of the equation, where Bk is the proportion of blacks in each town.
PTRATIO: It refers to the student-to-teacher ratio in each community.
LSTAT: It refers to the population's lower socioeconomic status.
MEDV: It refers to the 1000-dollar median value of owner-occupied residences.
# Check if there is any missing values. housing_df.isna().sum() CRIM 0 ZN 0 INDUS 0 CHAS 0 NOX 0 RM 0 AGE 0 DIS 0 RAD 0 TAX 0 PTRATIO 0 B 0 LSTAT 0 MEDV 0 dtype: int64
No missing values are found
We examine our data's mean, standard deviation, and percentiles.
The crime, area, sector, nitric oxides, 'B' appear to have multiple outliers at first look because the minimum and maximum values are so far apart. In the Age columns, the mean and the Q2(50 percentile) do not match.
We might double-check it by examining the distribution of each column.
Because the model is overly generic, removing all outliers will underfit it. Keeping all outliers causes the model to overfit and become excessively accurate. The data's noise will be learned.
The approach is to establish a happy medium that prevents the model from becoming overly precise. When faced with a new set of data, however, they generalise well.
We'll keep numbers below 600 because there's a huge anomaly in the TAX column around 600.
The overall distribution, particularly the TAX, PTRATIO, and RAD, has improved slightly.
Perfect correlation is denoted by the clear values. The medium correlation between the columns is represented by the reds, while the negative correlation is represented by the black.
With a value of 0.89, we can see that 'MEDV', which is the medium price we wish to anticipate, is substantially connected with the number of rooms 'RM'. The proportion of black people in area 'B' with a value of 0.19 is followed by the residential land 'ZN' with a value of 0.32 and the percentage of black people in area 'ZN' with a value of 0.32.
The metrics that are most connected with price will be plotted.
Gradient descent is aided by feature scaling, which ensures that all features are on the same scale. It makes locating the local optimum much easier.
Mean standardization is one strategy to employ. It substitutes (target-mean) for the target to ensure that the feature has a mean of nearly zero.
def standard(X): '''Standard makes the feature 'X' have a zero mean''' mu=np.mean(X) #mean std=np.std(X) #standard deviation sta=(X-mu)/std # mean normalization return mu,std,sta mu,std,sta=standard(X) X=sta X
For the sake of the project, we'll apply linear regression.
Typically, we run numerous models and select the best one based on a particular criterion.
Linear regression is a sort of supervised learning model in which the response is continuous, as it relates to machine learning.
Form of Linear Regression
y= θX+θ1 or y= θ1+X1θ2 +X2θ3 + X3θ4
y is the target you will be predicting
0 is the coefficient
x is the input
We will Sklearn to develop and train the model
#Import the libraries to train the model from sklearn.model_selection import train_test_split from sklearn.linear_model import LinearRegression
Allow us to utilise the train/test method to learn a part of the data on one set and predict using another set using the train/test approach.
X_train,X_test,y_train,y_test=train_test_split(X,y,test_size=0.4) #Create and Train the model model=LinearRegression().fit(X_train,y_train) #Generate prediction predictions_test=model.predict(X_test) #Compute loss to evaluate the model coefficient= model.coef_ intercept=model.intercept_ print(coefficient,intercept) [7.22218258] 24.66379606613584
In this example, you will learn the model using below hypothesis:
Price= 24.85 + 7.18* Room
It is interpreted as:
For a decided price of a house:
A 7.18-unit increase in the price is connected with a growth in the number of rooms.
As a side note, this is an association, not a cause!
You will need a metric to determine whether our hypothesis was right. The RMSE approach will be used.
Root Means Square Error (RMSE) is defined as the square root of the mean of square error. The difference between the true and anticipated numbers called the error. It's popular because it can be expressed in y-units, which is the median price of a home in our scenario.
def rmse(predict,actual): return np.sqrt(np.mean(np.square(predict - actual))) # Split the Data into train and test set X_train,X_test,y_train,y_test=train_test_split(X,y,test_size=0.4) #Create and Train the model model=LinearRegression().fit(X_train,y_train) #Generate prediction predictions_test=model.predict(X_test) #Compute loss to evaluate the model coefficient= model.coef_ intercept=model.intercept_ print(coefficient,intercept) loss=rmse(predictions_test,y_test) print('loss: ',loss) print(model.score(X_test,y_test)) #accuracy [7.43327725] 24.912055881970886 loss: 3.9673165450580714 0.7552661033654667 Loss will be 3.96
This means that y-units refer to the median value of occupied homes with 1000 dollars.
This will be less by 3960 dollars.
While learning the model you will have a high variance when you divide the data. Coefficient and intercept will vary. It's because when we utilized the train/test approach, we choose a set of data at random to place in either the train or test set. As a result, our theory will change each time the dataset is divided.
This problem can be solved using a technique called cross-validation.
With 'Forward Selection,' we'll iterate through each parameter to assist us choose the numbers characteristics to include in our model.
We'll use a random state of 1 so that each iteration yields the same outcome.
cols= los= los_train= scor= i=0 while i < len(high_corr_var): cols.append(high_corr_var[i]) # Select inputs variables X=new_df[cols] #mean normalization mu,std,sta=standard(X) X=sta # Split the data into training and testing X_train,X_test,y_train,y_test= train_test_split(X,y,random_state=1) #fit the model to the training lnreg=LinearRegression().fit(X_train,y_train) #make prediction on the training test prediction_train=lnreg.predict(X_train) #make prediction on the testing test prediction=lnreg.predict(X_test) #compute the loss on train test loss=rmse(prediction,y_test) loss_train=rmse(prediction_train,y_train) los_train.append(loss_train) los.append(loss) #compute the score score=lnreg.score(X_test,y_test) scor.append(score) i+=1
We have a big 'loss' with a smaller collection of variables, yet our system will overgeneralize in this scenario. Although we have a reduced 'loss,' we have a large number of variables. However, if the model grows too precise, it may not generalize well to new data.
In order for our model to generalize well with another set of data, we might use 6 or 7 features. The characteristic chosen is descending based on how strong the price correlation is.
high_corr_var ['RM', 'ZN', 'B', 'CHAS', 'RAD', 'DIS', 'CRIM', 'NOX', 'AGE', 'TAX', 'INDUS', 'PTRATIO', 'LSTAT']
With 'RM' having a high price correlation and LSTAT having a negative price correlation.
# Create a list of features names feature_cols=['RM','ZN','B','CHAS','RAD','CRIM','DIS','NOX'] #Select inputs variables X=new_df[feature_cols] # Split the data into training and testing sets X_train,X_test,y_train,y_test= train_test_split(X,y, random_state=1) # feature engineering mu,std,sta=standard(X) X=sta # fit the model to the trainning data lnreg=LinearRegression().fit(X_train,y_train) # make prediction on the testing test prediction=lnreg.predict(X_test) # compute the loss loss=rmse(prediction,y_test) print('loss: ',loss) lnreg.score(X_test,y_test) loss: 3.212659865936143 0.8582338376696363
The test set yielded a loss of 3.21 and an accuracy of 85%.
Other factors, such as alpha, the learning rate at which our model learns, could still be tweaked to improve our model. Alternatively, return to the preprocessing section and working to increase the parameter distribution.
For more details regarding scraping real estate data you can contact Scraping Intelligence today