scholarly journals ECC Design Based on Uniform Design Test Method and Alternating Conditional Expectation

2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Xiaoqin Li ◽  
Xiao Yang ◽  
Zude Ding ◽  
Xi Du ◽  
Jincheng Wen
Keyword(s):  
Regression Analysis ◽  
Conditional Expectation ◽  
Raw Materials ◽  
Uniform Design ◽  
Test Method ◽  
High Fracture ◽  
Four Point Bending ◽  
Alternating Conditional Expectation ◽  
Mix Proportion ◽  
Tensile Strains

Engineered cementitious composites (ECC) have higher ultimate tensile strains than normal concrete. The mechanical properties of ECC strongly depend on raw materials and the mix proportions. The uniform design test method and alternating conditional expectation, which is a nonparametric regression analysis method, were used to design the ECC mix proportion. According to the regression analysis, the optimized W/B, S/B, and F/B ranges could be obtained as 0.35–0.42, 0.25–0.3, and 0.02, respectively. The tested proportions for validation were randomly adopted within the range of W/B, S/B, and F/B. The uniaxial compression, tension, and four-point bending tests were conducted to verify the material behaviour of the designed ECC. Results showed that all the specimens had large ultimate tensile strains and high fracture energy capacities, and strain hardening was also observed. The fibers were found to be uniformly distributed in the specimens by using a scanning electron microscope. This paper may provide theoretical and practical guidance for the ECC and other cement-based material mix proportion design.

Experimental Study on the Compression Rebound Modulus of Coal Gangue Mixture

2012 ◽  
Vol 608-609 ◽  
pp. 1759-1763
Author(s):  
Xian Hai Xu ◽  
Ya Peng Zhang ◽  
Zhi Fei Zhang ◽  
Ju Jun Zhang
Keyword(s):  
Experimental Study ◽  
Regression Analysis ◽  
Fly Ash ◽  
Coal Mine ◽  
Uniform Design ◽  
Regression Equation ◽  
Coal Gangue ◽  
Analysis Model ◽  
Mix Proportion ◽  
Cement Mixture

This experiment was designed by making a coal gangue with coal gangue, fly ash, lime power and a small amount of cement mixture selected from Dongpang coal mine in Hanxing area.We tested the compressive rebound modulus strength of the mixture, and according to the method of uniform design, 8 groups mix ratio were designed and the experiments on the coal gangue mixture in various mix proportion have been conducted. The experimental results were analyzed by regression analysis model, and the regression equation between the compression rebound modulus of coal gangue mixture and the blending amount of each admixture was established. Finally, using this regression analysis model, the influence of the fly ash, calces, cement to strength on the compression rebound modulus of coal gangue mixture was analyzed.

Study for Seeking Optimal Mix Proportion of Resin Concrete

2011 ◽  
Vol 311-313 ◽  
pp. 1689-1694
Author(s):  
Long Wu ◽  
Yan Hua Hu ◽  
Xue Tao Qiao
Keyword(s):  
Regression Analysis ◽  
Design Method ◽  
Uniform Design ◽  
Design Concept ◽  
Mix Proportion ◽  
Optimal Mix ◽  
Practical Engineering ◽  
Spss Software ◽  
Reliable Design ◽  
Uniform Design Method

In the study, uniform design method is used to define the mix proportion of resin concrete. According to results obtained from the experiment, the optimal mix proportion of resin concrete can be got through regression analysis by using SPSS software, and MATLAB software together. The methods not only reduce the number of tests and the test costs greatly, but also provide an accurate and reliable design concept for the application of resin concrete in practical engineering.

scholarly journals A preliminary strategy for screening the combination of active components based on Bu–Shen–Yi–Qi Decoction for bronchial asthma

2019 ◽  
Vol 02 (03) ◽  
pp. 135-138
Author(s):  
Chen Yan ◽  
Qingli Luo ◽  
Cheng Ma ◽  
Jiaqi Liu ◽  
Jingcheng Dong
Keyword(s):  
Regression Analysis ◽  
Bronchial Asthma ◽  
Molecular Mechanisms ◽  
Uniform Design ◽  
Chinese Herbs ◽  
Chinese Drug ◽  
Active Components ◽  
Control Drug ◽  
Effective Components ◽  
Herba Epimedii

Objective: The anti-asthma herbal medicine Bu–Shen–Yi–Qi Decoction (BSYQ Decoction), a combination of three traditional Chinese medicine herbs developed in our lab, has shown demonstrated efficacy in Ovalbumin (OVA)-induced acute bronchial asthma. However, the obscure substances, multiple potential targets and the unclear molecular mechanisms are obstacles to control drug quality, stability and standardization. Multi-component formulae with a clear pharmacodynamic material and specific mechanism are an innovation worth exploring. They may also partly reserve a potential synergistic and additive effect compared with single components extracted from traditional Chinese herbs. This study was designed to select three standard multi-component formulae of the combination of effective components preliminarily based on four effective components [total flavonoids of Herba Epimedii ([Formula: see text]; Astragalus polysaccharide ([Formula: see text]; Astragaloside ([Formula: see text]; and Catalpol ([Formula: see text]] in BSYQ Decoction. Methods: OVA-induced asthmatic murine models were established. A uniform design was applied to select 10 proportions from four target components, and 3 formulae which showed best effect aimed at IFN-[Formula: see text], IL-4 and IgE in the serum respectively were screened based on stepwise regression analysis. Results: According to the regression analysis, Formula I ([Formula: see text]:[Formula: see text]:[Formula: see text]:6:29), Formula II ([Formula: see text]:[Formula: see text]:[Formula: see text]:8:2) and Formula III ([Formula: see text]:[Formula: see text]:[Formula: see text]:[Formula: see text]:50:8:2) are the three potential proper ratios for the new multi-component formula aimed at serum IFN-[Formula: see text], IL-4 and IgE in OVA-induced asthma mice, respectively. Conclusion: Three multi-component formulae derived from BSYQ Decoction could exert anti-inflammatory effect against OVA-induced asthma, which might provide evidences and lay foundations for further study of standard modern Chinese drug for treating asthma based on BSYQ Decoction.

C80 Early Strength Micro Expansion of Steel Tube Reinforced Concrete Research

2015 ◽  
Vol 1119 ◽  
pp. 752-755
Author(s):  
Chang Zheng Sun ◽  
Zheng Wang
Keyword(s):  
High Performance ◽  
Raw Materials ◽  
Influence Factors ◽  
High Strength ◽  
Steel Tube ◽  
Strength Analysis ◽  
Self Compacting Concrete ◽  
Mix Proportion ◽  
Early Strength ◽  
Working Performance

Optimization of mix proportion parameter ，Using ordinary raw materials makes a C80 high performance self-compacting concrete;By joining a homemade perceptual expansion agent, significantly improve the early strength of concrete and effective to solve the high strength of self-compacting concrete caused by gelled material consumption big contraction;Further study on the working performance of high-strength self-compacting concrete, age strength, analysis the influence factors of concrete are discussed.

Analyzing taxpayer support for the Krasnodar Krai's agricultural sector

2021 ◽  
Vol 19 (8) ◽  
pp. 1457-1476
Author(s):  
Valentina L. ZAZIMKO ◽  
Nadezhda V. SEDYKH
Keyword(s):  
Regression Analysis ◽  
Agricultural Sector ◽  
Positive Impact ◽  
Raw Materials ◽  
Agricultural Products ◽  
Agricultural Producers ◽  
Krasnodar Krai ◽  
Correlation And Regression Analysis ◽  
Budget Support ◽  
The Government

Subject. This article analyzes the implementation of the government programme of the Krasnodar Krai, Development of Agriculture and Regulation of Markets for Agricultural Products, Raw Materials and Food. Objectives. The article aims to assess the measures of budget support for the agricultural sector of the Krasnodar Krai. Methods. For the study, we used a correlation and regression analysis of official statistics. Results. The article finds that the government programme of the Krasnodar Krai, Development of Agriculture and Regulation of Markets for Agricultural Products, Raw Materials and Food has a positive impact on the progress of production in the agriculture of the region, but it does not contribute to the growth of investment in the industry. Conclusions. It is necessary to move from targeted support for individual agricultural producers to the creation of a modern sectoral infrastructure.

Research on Simulation Test of Coal Similar Material

2013 ◽  
Vol 850-851 ◽  
pp. 847-850 ◽  
Author(s):  
Lin Chao Dai
Keyword(s):  
Compressive Strength ◽  
Raw Materials ◽  
Similarity Theory ◽  
Design Method ◽  
Uniform Design ◽  
Physical And Mechanical Properties ◽  
Raw Material ◽  
Similar Material ◽  
Cement Ratio ◽  
Water Cement Ratio

In order to study the coal and gas outburst similar simulation experiment, coal similar material was made up based on the similarity theory. Based on the previous similar material study, the cement, sand, water, activated carbon and coal powder was selected as the raw material of similar material. Meanwhile similar material matching program with 5 factors and 6 levels was designed by using Uniform Design Method. And the physical and mechanical properties of the similar material compressive strength was measured under different proportions circumstances. The relationship between similar material and the raw materials was analyzed. The results show that choosing different materials can compound different similar materials with different requirements. And the water-cement ratio plays a decisive influence on the compressive strength of similar material. The compressive strength of similar material decreases linearly when the water-cement ratio increases.

scholarly journals Utilization of the Django Framework as a Dashboard Model Information System for Raw Material Inventory on PT Bimasakti Karyaprima

2019 ◽  
Vol 1 (2) ◽  
pp. 192-202
Author(s):  
Sandro Alfeno ◽  
Danang Rifai ◽  
Muhammad Saepudin
Keyword(s):  
Web Application ◽  
Swot Analysis ◽  
Raw Materials ◽  
Design Method ◽  
Test Method ◽  
Production Performance ◽  
Raw Material ◽  
Production Section ◽  
Equipment Production ◽  
Office Equipment

The aim of the research is to analyze the raw material inventory and design a dashboard system that can help achieve company goals. The research method used is the method of analysis of stash, software design methods, and methods of software testing. The design analysis method used is the SWOT analysis, the design method used is the design concept using UML diagrams, the soft test method uses the Black Box concept. The results achieved are a dashboard system used by the Warehouse Section and Production Section to monitor raw material inventories and production performance. The conclusion of this study is that the dashboard application that has been made can help the Warehouse and Production Section to monitor raw material inventory and production performance in real time. This web application provides information easily, quickly, concisely and interactively which includes raw materials for shoe components, office equipment, production tools and general equipment, inventory planning, recommendations and reports on transactions and raw material requests. Keywords : Dashboard, Material

Study on the Creep Properties of Resin Concrete

2014 ◽  
Vol 472 ◽  
pp. 649-653
Author(s):  
Hui Cun Shen ◽  
Kui Tian ◽  
Yan Hua Hu
Keyword(s):  
Dynamic Stiffness ◽  
Structure Design ◽  
Test Method ◽  
Bending Test ◽  
Creep Properties ◽  
Four Point Bending ◽  
Long Term Effect ◽  
Urgent Task ◽  
Machined Parts ◽  
New Material

Resin concrete is a new material which can be made into machine bed instead of the traditional pieces of gray cast iron as the machine base, it can improve the dynamic stiffness of machine tools and the quality of machined parts, and extend the campaign life, reduce noise and improve efficiency. However, due to the long-term effect of load of the resin concrete, the elastic deformation occurs in its component, and the strain will increase over time. Thus it can affect the resin concretes service life, and the calculation of creep has become an urgent task in structure design and use, which should be taken seriously. In this paper, the bending creep properties of resin concrete beam were studied and analyzed by using four-point bending test method. The creep curve under different load levels were obtained, and the viscoelastic properties were analyzed.

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