A New Dynamic Measurement for the Initial Prestress of Membrane Structure

2012 ◽  
Vol 468-471 ◽  
pp. 391-396
Author(s):  
Wei Jian Zhou ◽  
Wen Bo Sun
Keyword(s):  
Theoretical Basis ◽  
Membrane Structure ◽  
Engineering Application ◽  
Dynamic Measurement ◽  
Vibration Characteristic ◽  
Membrane Structures ◽  
New Approach ◽  
Vibration Method ◽  
Structural Membranes ◽  
Saddle Shape

There is an absent of an effective way to measure the prestress of the structural membranes during the construction stage and under normal conditions. A new approach based on vibration method is proposed in this paper. This article analyzes the vibration characteristic of the typical membrane structures (Saddle Shape and High Point Shape) and provides the theoretical basis for a new approach which is convenient for operation and reliable for engineering application.

Electrospun nano-bio membrane for bone tissue engineering application- a new approach

2020 ◽  
Vol 249 ◽  
pp. 123010 ◽  
Author(s):  
Senthil Rethinam ◽  
Bahri Basaran ◽  
Sumathi Vijayan ◽  
Ali Mert ◽  
Oğuz Bayraktar ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Bone Tissue Engineering ◽  
Bone Tissue ◽  
Engineering Application ◽  
Tissue Engineering Application ◽  
New Approach ◽  
Bone Tissue Engineering Application

The Higher Order Asymptotic Fields for Plane Interfacial Crack with Physical Weak-Discontinuity

2011 ◽  
Vol 217-218 ◽  
pp. 1314-1318
Author(s):  
Yao Dai ◽  
Lei Zhang ◽  
Peng Zhang ◽  
Jun Feng Liu
Keyword(s):  
Experimental Investigation ◽  
Numerical Analysis ◽  
Asymptotic Analysis ◽  
Theoretical Basis ◽  
Engineering Application ◽  
Interfacial Crack ◽  
Higher Order ◽  
Weak Discontinuity ◽  
Displacement Method ◽  
Asymptotic Fields

The higher order discontinuous asymptotic fields which are similar to the Williams’ solutions of homogenous material are obtained by the displacement method and asymptotic analysis for a plane crack at the physical weak-discontinuous interface in non-homogeneous materials. The results provide a theoretical basis for the numerical analysis, experimental investigation and the engineering application of physical weak-discontinuous fracture.

scholarly journals A New Approach for Assessing Credit Risks under Uncertainty

2020 ◽  
Author(s):  
Teimuraz Tsabadze
Keyword(s):  
Decision Making ◽  
Group Decision Making ◽  
Metric Space ◽  
Theoretical Basis ◽  
Fuzzy Numbers ◽  
Group Decision ◽  
Initial Part ◽  
New Approach ◽  
Trapezoidal Fuzzy Numbers ◽  
Credit Risks

The purpose of this chapter is to introduce a new approach for an assessment of the credit risks. The initial part of the chapter is to briefly discuss the existing models of assessment of the credit risks and justify the need for a new approach. Since a new approach is created for conditions of uncertainty, we cannot do without fuzzy mathematics. The proposed approach is based on group decision-making, where experts’ opinions are expressed by trapezoidal fuzzy numbers. The theoretical basis of the offered approach is laid out in the metric space of trapezoidal fuzzy numbers. The new approach is introduced and discussed, and two realization algorithms are given. The toy example of application of the introduced approach is offered as well.

Scientific Management 2.0 – A Design Model for Experimental Research in Production Management

2014 ◽  
Vol 1018 ◽  
pp. 571-579
Author(s):  
Günther Schuh ◽  
Thomas Gartzen ◽  
Felix Basse
Keyword(s):  
Experimental Research ◽  
Theoretical Basis ◽  
Production Management ◽  
Production Systems ◽  
Scientific Management ◽  
Deterministic Models ◽  
New Approach ◽  
Technical Aspects ◽  
The Poor ◽  
And Performance

Reliable and accurate predictions on future states of production systems are the objective of production theories. In this paper, the authors determined shortcomings of current deterministic models and traced them back to the poor theoretical basis of scientific research in the area. The observations resulted in the development of the conceptScientific Management 2.0as an appropriate research methodology for production management. This new empirical approach takes into account three requirements to scientifically precise investigations: It expands existing theory by socio-technical aspects, uses embedded experiments as a profound basis for investigation and provides a design that warrants the methodical exactness required. RWTH Aachen’sDemonstration Factoryrepresents an adequate infrastructure to prove feasibility and performance of the new approach.

scholarly journals Computer-Integrated Manufacturing System for Membrane Structures

2019 ◽  
Vol 258 ◽  
pp. 02025
Author(s):  
Kazuo Yokobori ◽  
Tomo Miura
Keyword(s):  
Membrane Structure ◽  
Three Dimensional ◽  
Numerical Data ◽  
3D Models ◽  
Space Structure ◽  
Computer Integrated Manufacturing ◽  
Support Vector ◽  
Membrane Structures ◽  
Structure Estimation ◽  
Steel Panels

A membrane structure is a space structure composed of a membrane material (fabric or film), cables, and steel frames, among others. It reduces the environmental load for transporting materials and constructions; for instance, compared with conventional roofs that have steel panels or tiles, the membrane structure of a roof is lightweight. Computer analysis and three-dimensional (3D) models are required for determining the stable shape of such tensile structures. It is useful to use computer-integrated systems for the design and manufacturing process because these 3D models consist of numerical data. In this study, we developed a system program based on artificial intelligence methods, with a support vector machine instead of human judgment for the membrane structure estimation and for a probabilistic optimization to predict the differences caused by production loss etc. and compare the results after actual production. And we got close predicted results to the person.

scholarly journals Analysis of Wind-Induced Vibration of a Spoke-Wise Cable–Membrane Structure

2020 ◽  
Vol 8 (8) ◽  
pp. 603
Author(s):  
Hua Huang ◽  
Yaoqiang Xian ◽  
Wei Zhang ◽  
Mengxue Guo ◽  
Kun Yang ◽  
...  
Keyword(s):  
Stress Relaxation ◽  
Dynamic Behavior ◽  
Damage Assessment ◽  
Membrane Structure ◽  
Aerospace Industry ◽  
Time History ◽  
Wind Load ◽  
Membrane Structures ◽  
Wind Resistance ◽  
Wind Induced Vibration

Lightweight cable–membrane structures can span large distances and undertake aesthetically pleasing shapes. They are widely used for roofs and modern structural canopies and in the aerospace industry for large on-board antenna reflectors that are to be deployed in space. This paper studies a wind-induced vibration under different cable stress relaxation conditions based on the wind load time-history to obtain the dynamic behavior of such a structure. Particularly, the focus is put upon its wind resistance in the event of stress relaxation. This research can provide an important reference for the design of wind resistance, damage assessment, and emergency maintenance for the spoke-wise cable–membrane structure (SCMS).

DYNAMIC CHARACTERISTICS OF SnO2 GAS SENSOR FOR LPG DETECTION

2004 ◽  
Vol 01 (03) ◽  
pp. 225-230
Author(s):  
JINHUAI LIU ◽  
FANLI MENG ◽  
XINGJIU HUANG ◽  
JIARUI HUANG
Keyword(s):  
Fourier Transform ◽  
Power Spectrum ◽  
Gas Sensor ◽  
Dynamic Characteristics ◽  
Rapid Detection ◽  
Dynamic Measurement ◽  
Liquefied Petroleum Gas ◽  
Dynamic Measurements ◽  
New Approach ◽  
Hazardous Gas

A new approach for rapid detection of hazardous gas like domestic liquefied petroleum gas (LPG) using a single SnO 2 gas sensor based on dynamic measurement was studied. The working principles of static and dynamic measurements were compared and experimental and analytical profiles of the dynamic measurement was also investigated. Experimental results showed that hazardous gas such as LPG had obvious properties by using dynamic measurement. The qualitative analysis was also studied by means of fast Fourier transform (FFT), and power spectrum showed that different properties appeared on different concentrations of LPG.

Effect of Fine Aggregate on Properties of Asphalt Mixture

2014 ◽  
Vol 599 ◽  
pp. 115-119
Author(s):  
Fei Shang ◽  
Kai Xuan Li ◽  
Xin Yan Zhang ◽  
Yan Gao
Keyword(s):  
Theoretical Basis ◽  
Absorption Rate ◽  
Asphalt Mixture ◽  
Engineering Application ◽  
Vital Role ◽  
Volumetric Properties ◽  
Fine Aggregate ◽  
Stability Performance ◽  
Temperature Performance ◽  
Fine Aggregates

The fine aggregate plays a vital role in the performances of asphalt mixture. In this paper, four kinds of fine aggregates with different lithology, apparent density and water absorption rate were discussed. Asphalt mixture according to AC-13 is prepared by these four kinds of fine aggregates and the volumetric properties, water stability performance and high temperature performance of asphalt mixture were tested. Research shows that: the aggregate performance and the performance of mixture have obvious corresponding relation, which provides the theoretical basis for the engineering application of composite aggregates.

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