Mean square

Part 2 of ebook "Introduction to time series and forecasting (Third edition)" provides readers with contents including: Chapter 7 - Time series models for financial data; Chapter 8 - Multivariate time series; Chapter 9 - State-space models; Chapter 10 - Forecasting techniques; Chapter 11 - Further topics; Appendix A - Random variables and probability distributions; Appendix B - Statistical complements; Appendix C - Mean square convergence;...

224p daonhiennhien 03-07-2024 1 1   Download

This study is to evaluate the precision of some new global Earth Gravitational Models in the East Vietnam Sea, selecting the best model. The method and the program for calculating Free air gravity anomaly from the global earth gravitational model have been researched and developed. Evaluation of the precision of the models is done by comparing the models with ship-derived gravity anomalies. Data with anomalous signs are detected and removed when the deviation exceeds three times the root mean square deviation.

13p dianmotminh02 03-05-2024 1 1   Download

Bài viết "Kỹ thuật hiệu chỉnh nền trên miền số sai lệch định thời trong các bộ TIADC dựa trên xấp xỉ Taylor bậc hai" đề xuất kỹ thuật hiệu chỉnh sai lệch định thời trên miền số trong các bộ chuyển đổi tương tự - số ghép xen thời gian (TIADC - Time-Interleaved Analog-to-Digital Converter) dựa trên xấp xỉ Taylor bậc hai. Dựa vào việc phân tích tín hiệu cần sửa lỗi theo xấp xỉ Taylor bậc hai, kỹ thuật đề xuất thực hiện ước lượng sai lệch định thời bằng thuật toán bình phương trung bình cực tiểu (LMS - Least Mean Squares) nhằm tăng tốc độ tính toán và giảm tài nguyên phần cứng.

6p phocuuvan0201 02-02-2024 5 2   Download

Bài viết "Ứng dụng DNN trong hệ thống Cell Free Massive MIMO sử dụng tiền mã hóa LMMSE" đề xuất thuật toán lặp (WMMSE-ADMM) để xác định hệ số phân bổ công suất tối ưu cho hệ thống cell free massive MIMO. Thuật toán này vẫn cần nhiều thời gian để tính toán. Bài báo này đề xuất sử dụng một mạng neuron sâu để huấn luyện hệ thống cell free massive MIMO sử dụng tiền mã hóa locally minimum mean square error (L-MMSE) nhằm giảm thời gian tìm ra các hệ số phân bổ công suất tối ưu.

6p phocuuvan0201 02-02-2024 10 1   Download

Radiotherapy has been widely used to treat various cancers, but its efcacy depends on the individual involved. Traditional gene-based machine-learning models have been widely used to predict radiosensitivity.

15p vileonardodavinci 23-12-2023 6 3   Download

This study develops and validates a short-term PV power forecasting model by using the combination of a genetic algorithm (GA) and Long Short Term Memory (LSTM). The performance of the proposed model is compared with LSTM baseline model by three errors (Root mean square error(RMSE), Mean absolute error (MAE), and Mean absolute percentage error (MAPE)) in two case studies.

6p vijeff 01-12-2023 4 3   Download

Part 2 book "Foundations of clinical research - Applications to evidence based practice" includes content: Descriptive statistics, foundations of statistical interference; comparing two means - the t-test, comparing more than two means - analysis of variance; multiple comparison tests; nonparametric tests for group comparisons; measuring association for categorical variables - chi square.... and other contents.

356p oursky07 23-10-2023 1 1   Download

This paper develops an Artificial Neural Network (ANN) model based on 96 experimental data to forecast the dynamic modulus of asphalt concrete mixtures. The accuracy of the models was assessed using numerous performance indexes such as the Root Mean Square Error (RMSE), Mean Absolute Error (MAE), Mean Absolute Percentage Error (MAPE), and coefficient of determination (R2).

10p visharma 20-10-2023 3 3   Download

Estimation of Construction Price Index (CPI) is important for a market economy and it is a measure to manage construction investment costs. This is a tool to help organizations and individuals to reduce the effort and management of expenses for construction projects by reducing time of procedures for calculating and adjusting the total investment for the estimation and evaluation of contract price.

11p visharma 20-10-2023 7 4   Download

The performance of the proposed RF model is evaluated using three statistical measurements: root mean squared error (RMSE), mean absolute error (MAE), and correlation coefficient (R). The results show that the RF model has high predictive accuracy with an RMSE of 210 cnt/h, an MAE of 121 cnt/h, and an R of 0.90. The performance of the RF model is also compared with a linear regression model and shows superior accuracy.

9p visharma 20-10-2023 8 4   Download

In this study, an artificial neural network-based Bayesian regularization (ANN) model is proposed to predict the compressive strength of concrete. The database in this study includes 208 experimental results synthesized from laboratory experiments with 9 input variables related to temperature change and design material composition.

13p visharma 20-10-2023 5 4   Download

Nghiên cứu này trình bày về việc chẩn đoán sức khỏe kết cấu của dầm chịu tải trọng di động thông qua dữ liệu đường ảnh hưởng của chuyển vị. Ứng xử của một kết cấu dầm đồng chất dài 2,2 m chịu tải trọng di động được tính toán dựa trên phương pháp phần tử hữu hạn. Đánh giá tình trạng hư hỏng bao gồm chẩn đoán sự xuất hiện, vị trí và mức độ suy giảm độ cứng.

19p viengels 25-08-2023 10 5   Download

In this article, an RF model is developed in predicting the slump and strength of concrete using mixed mineral admixtures from blast furnace slag and silicafume. The criterions to evaluate the accuracy of the models are the R squared (R2 ) and the root mean square error (RMSE).

13p viengels 25-08-2023 10 3   Download

This paper presents results building the Mean Value Engine Model (MVEM) of modern diesel engine in MATLAB/Simulink with input data defined by measuring on testing stand and using weighted least-squares optimization. This model is used in model simulating vehicles dynamics using modern diesel engine.

6p vifriedrich 25-08-2023 5 2   Download

Part 2 book "Elementary statistics - Step by step approach" includes content: Hypothesis testing, correlation and regression, testing the difference between two means, two proportions, and two variances, other chi square tests, analysis of variance, sampling and simulation, nonparametric statistics.

456p oursky01 24-07-2023 9 6   Download

Estimating punching shear capacity (PSC) of steel fibre reinforced concrete slabs (SFRCS) is a crucial task in structural design. This study investigates the performances of artificial neural networks trained by the adaptive moment estimation (Adam) method in dealing with the task of interest. To alleviate overfitting problem, decoupled weight decay (AdamW) and L2 regularization (AdamL2) are used. A dataset including 140 samples has been used to train and verify the machine learning approaches.

5p nhanchienthien 25-07-2023 6 3   Download

Continued part 1, part 2 of ebook "Construction program management – Decision making and optimization techniques" presents the following content: mathematical methods – statistics and forecasting; operations research and optimization techniques; techniques for intelligent decision support systems;...

83p dieptieuung 14-07-2023 9 3   Download

Ebook A modern introduction to probability and statistics: Understanding why and how - Part 1 presents the following content: Chapter 17 basic statistical models, chapter 18 the bootstrap, chapter 19 unbiased estimators, chapter 20 efficiency and mean squared error, chapter 21 maximum likelihood, chapter 22 the method of least squares, chapter 23 confidence intervals for the mean, chapter 24 more on confidence intervals, chapter 25 testing hypotheses: essentials, chapter 26 testing hypotheses: elaboration, chapter 27 the t-test, chapter 28 comparing two samples.

233p haojiubujain02 03-07-2023 2 2   Download

Artificial neural network (ANN) has been widely applied in oil and gas exploration and production. This study presents the results of predicting the distribution of Late Oligocene sandstones in the Cuu Long basin based on the application of ANN and seismic attributes.

8p viwolverine 07-07-2023 7 3   Download

Ebook Introductory statistics: Part 2 includes the following content: Chapter 9 hypothesis tests about the mean and proportion, chapter 10 estimation and hypothesis testing: two populations, chapter 11 chi-square tests, chapter 12 analysis of variance, chapter 13 simple linear regression, chapter 14 multiple regression, chapter 15 nonparametric methods, appendix a sample surveys, sampling techniques, and design of experiments, appendix b explanation of data sets, appendix c statistical tables.

336p haojiubujain01 24-06-2023 8 5   Download