Compress

This study also contributes to reducing environmental pollution caused by plastic and glass waste as well as current construction brick production methods. The results show that the bulk density, compressive strength, and bending strength of brick samples made from PET plastic and glass waste are higher than those of burnt clay brick samples, while water absorption is much smaller than that of burnt clay brick samples.

8p viengfa 28-10-2024 2 1   Download

In this paper, the effect of continuous carbon fibers (CCF) on the stiffness of 3D printed frames is investigated. Fused deposition modelling (FDM) technology is employed to build three typical frames with 15% of CCF and 85% poliamide 12 which is combined 10% short carbon fibers (PA12-CF) for compress testing.

7p viengfa 28-10-2024 1 1   Download

The nonlinear dynamic buckling responses of functionally graded graphene platelet reinforced composite (FG-GPLRC) cylindrical and sinusoid panels with porous core are presented in this paper. The governing formulations are established by applying the nonlinear higher-order shear deformation theory (HSDT).

10p viengfa 28-10-2024 3 2   Download

In this study, our primary aim is to assess and compare the efficacy of Support Vector Machines (SVM) employing various kernel functions: linear (LIN), polynomial (POL), Radial Basis Function (RBF), and sigmoid (SIG) in predicting the compressive strength of concrete.

14p viengfa 28-10-2024 2 2   Download

In this paper, the nonlinear buckling behavior of functionally graded material (FGM) plates subjected to an axial compression is analytically investigated. Assuming that the plates are stiffened by FGM rectangular, I- and T-stiffeners.

8p viengfa 28-10-2024 4 2   Download

The linear buckling behavior of functionally graded cylindrical shells with porous core stiffened by spiral stiffeners under axial compression using the first-order shear deformation theory is presented in this paper.

9p viengfa 28-10-2024 3 2   Download

This study focuses on optimizing the hyperparameters of the XGB model by a grid search to find an optimal XGB predictive model. In addition, the effect of input parameters on the SCCRF's CS is studied using Shapley Additive exExplanations (SHAP) values technique.

14p viengfa 28-10-2024 6 2   Download

Rubberized concrete is a material that is both ecologically friendly and sustainable, and it has been finding more and more usage in building applications recently. In this study, a machine learning model, namely LightGBM, is developed to predict rubberized concrete's compressive strength (CS) using 11 input parameters.

18p viengfa 28-10-2024 3 1   Download

In this study, an artificial neural networkbased 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.

12p viengfa 28-10-2024 2 2   Download

This review paper aims to summarize the existing research to identify the main factors influencing the mechanical characteristics of cement-treated soil, specifically unconfined compressive strength (UCS), tensile strength, and modulus of elasticity.

17p viengfa 28-10-2024 4 2   Download

This paper uses the discrete element method to simulate a soft grain that can deformed without rupturing. This soft grain is composed of rigid primary particles with a cohesive contact law between them. The results showed that rigid primary particles within the deformable grain can move and rearrange in response to vertical compression.

5p vihyuga 20-02-2025 5 1   Download

This study is devoted to determining dynamic parameters of dense coral sand using Controls dynamic triaxial compression testing device under large deformation and different confining pressure conditions. Parameters analyzed in the present work include excess pore pressure, damping ratio, dynamic elastic modulus and dynamic shear modulus.

12p viyamanaka 06-02-2025 5 1   Download

In Vietnam, there is not enough sand from the river for the construction operation, and it is necessary to find other resources to replace it. Marine sand was distributed in large areasin the coastal area of Vietnam and was not used for rural roads. This paper presents experimental results on the workability and compressive strength of concrete which was made from Nghe An and Ha Tinh marine sand.

8p viyamanaka 06-02-2025 5 2   Download

This paper presents a sensitivity analysis of key factors influencing the reliability of reinforced concrete columns strengthened with Fabric-Reinforced Cementitious Matrix (FRCM) with carbon fabric. Key parameters examined include axial force, concrete compressive strength, longitudinal reinforcement diameter, and stirrup diameter.

6p vibenya 31-12-2024 4 2   Download

The article investigates the potential of using sea sand and seawater from Ha Tien City, Kien Giang Province, in geopolymer concrete production. Geopolymer concrete is an environmentally friendly material that can help reduce greenhouse gas emissions while utilizing locally available resources.

5p vibenya 31-12-2024 11 2   Download

This study comprehensively analyzes the impact of temperature and curing time on the compressive strength of geopolymer concrete made with locally sourced sea sand and seawater. The research aims to utilize abundant regional materials while reducing the environmental footprint associated with traditional construction practices.

5p vibenya 31-12-2024 6 2   Download

This study shows that when compression/bending and torsion are applied simultaneously, the bond between the concrete core and steel tube may weaken, leading to slippage, which in turn reduces the structural system’s load-bearing efficiency.

8p vibenya 31-12-2024 3 2   Download

Document "Mechanical properties of solid polymer" presentation of content: Ideal Solids, tensile properties, shear properties, compressive properties, hardness, impact strength, coefficient of friction.

22p phamvanphat1891995 04-03-2016 58 2   Download

Truyền hình kỹ thuật số mặt đất (tiếng Anh: Digital Terrestrial Television - DTT) là công nghệ chuyển đổi từ analog (tương tự) sang digital (kỹ thuật số). Ưu điểm của phương thức này là hình ảnh sắc nét, có chiều sâu, loại bỏ hoàn toàn hiện tượng nhiễu và bóng ma (ghost free) vốn là nhược điểm của truyền hình analog thông thường, loại bỏ tác hại của các tia sóng phản xạ, không bị ảnh hưởng nhiễu phát ra do máy vi tính, mô tơ điện, sấm sét... Truyền hình kỹ thuật số mặt đất có khả năng...

59p hoa_layon 21-08-2011 287 95   Download

Một số kiến thức cơ bản cần chuẩn bị: hệ tuyến tính, ma trận và vectơ, xác suất; lập trình Matlab. Đặc trưng cơ bản của tín hiệu: tương tự, số; Nguyên tắc biến đổi A/D; Ưu điểm của tín hiệu số; Cần phân biệt giữa khái niệm xử lý (processing) tín hiệu âm thanh và hình ảnh liên quan đến rất nhiều lĩnh vực, kỹ thuật và nén (compression). Nén chỉ là một phần của xử lý tín hiệu. Phân biệt rõ khái niệm nén hay còn gọi là mã hóa nguồn và khái niệm mã hóa kênh; khái niệm entropy; mã hóa không...

221p tieuphiho90 05-01-2013 367 64   Download