Discreteness

This paper introduces the application of the standard Particle Swarm Optimization (PSO) algorithm with discrete integer variables to solve the problem of optimizing the position of tower cranes and material supply points.

10p viengfa 28-10-2024 2 1   Download

This paper investigates the problem of finite-time stability for discrete-time neural networks with sector-bounded neuron activation functions and interval-like timevarying delay. The extended reciprocally convex approach is used to establish a delay-dependent sufficient condition to ensure finite-time stability for this class of systems.

12p viling 11-10-2024 0 0   Download

In this paper, we propose an algorithm to discretize the n-th order derivative with high-order accuracy. Theoretical results and experimental calculations have confirmed the accuracy of the algorithm.

9p viling 11-10-2024 2 0   Download

In this study, we propose a novel approach using the oscillation characteristics of the RMS current as the input to machine learning models, combined with the confident learning technique. Using the oscillation characteristics obtained by taking a discrete Fourier transform (DFT) of the RMS current as model input, we aim to reduce the computational requirements of the machine learning models.

12p viling 11-10-2024 1 0   Download

This work is devoted to conducting a new study for global dynamics and numerical simulation of a discrete-time computer virus propagation model, which was constructed in our recent work. By utilizing well-known results on asymptotic stability of discrete-time dynamical systems, we establish the global asymptotic stability of a unique viral equilibrium point, whereas only its local asymptotic stability was previously analyzed.

8p viyoko 01-10-2024 6 1   Download

This article employs the finite element method (FEM) to evaluate the local hydraulic losses in complex geometries discretized by unstructured mesh. The method is applied to the laminar flow of Newtonian fluid.

14p viyoko 01-10-2024 4 1   Download

One of the factors that greatly affects the flight safety of airships is weather conditions and in particular, discrete gust with a speed equivalent to the speed of the airship. This article presented a method of numerical simulation of discrete gust according to flight safety standards.

11p viyoko 01-10-2024 4 1   Download

In this paper, a model derived based on the discrete computational method is proposed to calculate the shear strength of column carried by multi-spiral transverse reinforcement, accounting for the effect of compression depth.

17p vifilm 24-09-2024 2 1   Download

This paper summarizes the basic principle of FEM and DEM, then reviews a number of possible direct coupling strategies between FEM and DEM together with potential applications in civil engineering. The second objective is to develop a model that combines these two above mentioned methods in a multi-scale approach.

12p vifilm 24-09-2024 2 1   Download

By using an extensive three-dimensional discrete element method, we numerically investigate the effects of lightweight particle content on the mechanical strength of the cylindrical aggregates, randomly composed of two different groups of primary particles: light (low stiffness) and heavy (high stiffness), and the stress contribution of the heavy-heavy, light-heavy, and light-light interactions on the mechanical behavior of such aggregates, subjected to the compression test by using a constant downward velocity.

11p vifaye 20-09-2024 1 1   Download

In this paper, we numerically study the mobility of an unsaturated gravitational-granular flow, occurring on a slope-break system that contains two regions: Inclined-upstream and horizontal-downstream areas, by using three-dimensional discrete element simulations.

10p vifaye 20-09-2024 3 1   Download

We numerically study the effects of the size polydispersity and the friction coefficient on the compressive strength of wet granules under a diametrical compression test by using discrete element simulations. The numerical method is coupled with the capillary cohesion law which is enhanced by the cohesive forces between grains in the pendular regime.

9p vifaye 20-09-2024 1 1   Download

This paper presents the upper bound limit analysis of a slope in cohesive-frictional soils using the node-based smoothed finite element method (NS-FEM). The soil slope was discretized as triangular elements and modeled as Mohr-Coulomb material with the associated flow rule.

14p vifaye 20-09-2024 4 1   Download

Bài báo "Nghiên cứu sự phá hủy của cấu kiện bê tông chịu nén và dầm bê tông chịu uốn 3 điểm dựa trên mô phỏng số, sử dụng phương pháp phần tử rời rạc (DEM)" sử dụng phương pháp phần tử rời rạc (Discrete Element Method DEM) để mô hình hóa cấu kiện vật liệu bê tông chịu nén và và dầm bê tông có xẻ rãnh chịu uốn 3 điểm. Qua đó, nghiên cứu và phân tích ứng xử cơ học, cũng như cơ chế phá hủy của vật liệu trong các trường hợp chịu lực khác nhau.

10p dathienlang1012 03-05-2024 3 1   Download

The thesis "Stability of some classes of degenerate two-phase difference systems with delay" is to study the stability of degenerate two-phase systems with mixed delay in the direction of variation; Stability and dissipation in finite domain of degenerate 2-D system with variable delay; Evaluation of the gain set and control design for a degenerate 2-D system in the Roesser model with variable delay;... Please refer to it!

120p gaupanda019 21-03-2024 4 1   Download

Bài giảng Khai phá dữ liệu (Data mining): Data preprocessing, chương này trình bày những nội dung về: why preprocess the data; descriptive data summarization; data cleaning; data integration and transformation; data reduction; discretization and concept hierarchy generation;... Mời các bạn cùng tham khảo chi tiết nội dung bài giảng!

71p diepkhinhchau 18-09-2023 9 5   Download

Bài viết Đánh giá hiệu quả kỹ thuật thủy vân bền vững trên những miền tần số kết hợp đề xuất lược đồ thủy vân mù (blind watermarking) áp dụng cho ảnh số sử dụng biến đổi DWT (Discrete Wavelet Transform) kết hợp DCT (Discrete Cosine Transform) và SVD (Singular Value Decomposition) dựa trên thống kê.

14p viannee 02-08-2023 10 4   Download

Magnetic bearing systems have received much attention in the research community for the past decades. Its inherent nonlinearity and open-loop instability present challenges for controller design. This thesis investigates and designs model predictive control (MPC) systems for an experimental Active Magnetic Bearing (AMB) laboratory system. A host-target development environment of real-time control system with hardware in the loop (HIL) is used for implementation of the predictive control systems. In this thesis, both continuous and discrete time model predictive controllers are studied.

172p runthenight05 01-03-2023 9 3   Download

The aim of this research is to employ a sensitivity study for the total thrust of a ducted twin counter-rotating propeller system design for UAV applications using computational fluid dynamics (CFD). Two factors were investigated: propeller spacing and difference between blades pitch angle. Using discrete values for both factors, 32 designs were analysed and evaluated. The same approach was also used for an equivalent unducted propeller system to access the influence of the duct.

142p runthenight07 01-03-2023 10 3   Download

This thesis is divided into six chapters. The current chapter has introduced the thesis. Chapter 2 discusses the background of the institutional features of the Indian IPO market, including the grey market. Chapter 3 (Study 1) introduces an integrated conceptual framework of information sharing, with and without allocation discretion to underwriters. Chapter 4 (Study 2) applies signaling theory in the Indian IPO market setting to understand the effect of the information asymmetry between IPO investors.

234p runthenight04 02-02-2023 7 3   Download