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The Statistical Analysis of Relation between Compressive and Tensile/Flexural Strength of High Performance Concrete

statistical analysis of design methods efficiency in determining shear capacity of reinforced concrete beams, Proceedings of the 11th International Probabilistic Workshop, Brno, 2013. 14. S.S. Shapiro, M.B. Wilk., An analysis of variance test for normality, complete samples., Biometrica, vol.54, Great Brittan, 1965.

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Use of State-of-the-Art Methods in the Architectural Design Process

Abstract

The following article summarizes a research with the intention to demonstrate the challenges that architecture students need to face throughout their design tasks. The study is also meant to contribute to the cognition of state-of-the-art methods that can help students with these emerging problems.

The main source of information was a questionnaire. Students were asked about the duties they accomplish when completing a design, about their adopted design methods and about their thoughts on a future profession. As a complement, Interviews were conducted with professional architects from local studios. This allowed a deeper insight into the requirements that the two sides lay down for each other.

The research charts how computer aided design could affect the difficulties that appear in the architectural design process.

Open access
Visual-Simulation-Based Personalized Garment Block Design Method for Physically Disabled People with Scoliosis (PDPS)

References [1] Subramanyam R, Schaffzin J, Cudilo EM, Rao MB and Varughese AM. Systematic review of risk factors for surgical site infection in pediatric scoliosis surgery. Spine J. 2015; 15: 1422-31. [2] Hong Y, Zeng X, Bruniaux P and Liu K. Interactive virtual try-on based three-dimensional garment block design for disabled people of scoliosis type. Textile Research Journal. 2016: 0040517516651105. [3] Y. HONG PB, X. ZENG1, K. LIU, M.DONG. Virtual Reality Based Collaborative Design Method for Designing Customized Garment of Disabled People

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Computer-Aided Design Method of Warp-Knitted Jacquard Spacer Fabrics

Abstract

Based on a further study on knitting and jacquard principles, this paper presents a mathematical design model to make computer-aided design of warp-knitted jacquard spacer fabrics more efficient. The mathematical model with matrix method employs three essential elements of chain notation, threading and Jacquard designing. With this model, the processing to design warp-knitted jacquard spacer fabrics with CAD software is also introduced. In this study, the sports shoes which have separated functional areas according to the feet structure and characteristics of movement are analysed. The results show the different patterns on Jacquard spacer fabrics that are seamlessly stitched with jacquard technics. The computer-aided design method of warp-knitted jacquard spacer fabrics is efficient and simple.

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The conditional risk probability-based seawall height design method

Abstract

The determination of the required seawall height is usually based on the combination of wind speed (or wave height) and still water level according to a specified return period, e.g., 50-year return period wind speed and 50-year return period still water level. In reality, the two variables are be partially correlated. This may be lead to over-design (costs) of seawall structures. The above-mentioned return period for the design of a seawall depends on economy, society and natural environment in the region. This means a specified risk level of overtopping or damage of a seawall structure is usually allowed. The aim of this paper is to present a conditional risk probability-based seawall height design method which incorporates the correlation of the two variables. For purposes of demonstration, the wind speeds and water levels collected from Jiangsu of China are analyzed. The results show this method can improve seawall height design accuracy.

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The improved design method of shear strength of reinforced concrete beams without transverse reinforcement

Abstract

In this article, results of experimental testing of reinforced concrete beams without transverse shear reinforcement are given. Three prototypes for improved testing methods were tested. The testing variable parameter was the shear span to the effective depth ratio. In the result of the tests we noticed that bearing capacity of RC beams is increased with the decreasing shear span to the effective depth ratio. The design method according to current codes was applied to test samples and it showed a significant discrepancy results. Than we proposed the improved design method using the adjusted value of shear strength of concrete CRd,c. The results obtained by the improved design method showed satisfactory reproducibility.

Open access
A matrix inequality based design method for consensus problems in multi-agent systems

A matrix inequality based design method for consensus problems in multi-agent systems

In this paper, we study a consensus problem in multi-agent systems, where the entire system is decentralized in the sense that each agent can only obtain information (states or outputs) from its neighbor agents. The existing design methods found in the literature are mostly based on a graph Laplacian of the graph which describes the interconnection structure among the agents, and such methods cannot deal with complicated control specification. For this purpose, we propose to reduce the consensus problem at hand to the solving of a strict matrix inequality with respect to a Lyapunov matrix and a controller gain matrix, and we propose two algorithms for solving the matrix inequality. It turns out that this method includes the existing Laplacian based method as a special case and can deal with various additional control requirements such as the convergence rate and actuator constraints.

Open access
A Simple Robust PID Controller Design Method Based on Sine Wave Identification of the Uncertain Plant

A Simple Robust PID Controller Design Method Based on Sine Wave Identification of the Uncertain Plant

The paper deals with the development and application of a new simple empirical approach to the design of robust PID controllers for technological processes in industrial practice. The main advantage of the proposed approach is the possibility to specify the required performance before the design algorithm implementation. Identification of characteristic data of the black-box type plant with varying parameters is carried out using the sine wave excitation signal, thus allowing to design the controller without necessarily knowing the mathematical model of the plant. The proposed approach has been verified on a real-world physical process.

Open access
Design Method of Winch Driven by Contactless Magnetic Coupling under Deepwater

Abstract

Through the combination subject of scientific research, the design method of the winch driven by contactless magnetic coupling is researched for the core purpose of the turning shaft sealing in a deepwater environment. This method has six design phases, including domestic and foreign information query and retrieval, graphic analyses of relevant structures, innovative design of 2D assembly sketches, a theoretical computation of structure parameters, the 3D modeling and motion simulation and engineering drawing. This method is of generality, which can provide examples for the postgraduate students and engineering personnel in self-renovation design of scientific research.

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A complete design of ship propellers using the new computer system

A complete design of ship propellers using the new computer system

The computer system presented in this article is composed of several program blocks for the complete design of ship propellers. The design calculations are based on a combination of the modified lifting line theory and on the vortex lifting surface theory. The system enables solution of the following design problems:

- calculation of the scale effect on the ship wake velocity field, including the influence of the propeller and rudder on this field at the propeller location

- maximization of the propulsive efficiency

- optimization of the propeller blade geometry on the basis of the compromise between the cavitation and blade strength requirements

- optimization of the number of propeller blades and blade geometry on the basis of the acceptable level of induced pressure pulses and unsteady shaft bearing forces

- calculation of the blade spindle torque for the controllable pitch propellers.

The computer system is equipped with many numerical options for graphical visualization of the input data, including an easy possibility of their correction and control of the intermediate and final results of calculations.

Open access