Research on Influence of Span on Surrounding Rock Quality of Tunnels

2014 ◽  
Vol 919-921 ◽  
pp. 869-872
Author(s):  
Xiao Jie Geng ◽  
Xiao Wei Du ◽  
Qiong Yan
Keyword(s):  
Rock Mass ◽  
Numerical Experiment ◽  
Quality Index ◽  
Quality Evaluation ◽  
Measured Data ◽  
Surrounding Rock ◽  
National Standard ◽  
Rock Quality ◽  
The Relationship

The influence of tunnel’s span on rock mass quality is getting more and more recognition along with increasing large span tunnels’ construction. As national standard of China, BQ qualification is generally applied. Based on the measured data and numerical experiment, the relationship between surrounding rock displacement and quality evaluation is studied, and span effect correction factor is established. The modified rock quality index can provide the basis of guiding the design and construction of tunnels.

scholarly journals Fine quality evaluation of surrounding rock of an underground hydropower station

2020 ◽  
Vol 194 ◽  
pp. 05041
Author(s):  
Xiaojun Bao ◽  
Zhiyuan Wang ◽  
Shuai Ma ◽  
Gao Liu
Keyword(s):  
Quality Evaluation ◽  
Surrounding Rock ◽  
Classification Method ◽  
Hydropower Station ◽  
Rock Classification ◽  
Rock Quality ◽  
Grade Ii ◽  
Grade Iii

Using RMR surrounding rock classification method, the surrounding rock quality of underground main powerhouse of a hydropower station is evaluated with a small evaluation unit. The results of surrounding rock classification show that the surrounding rock of main powerhouse is mainly Grade III, and Grade II and IV surrounding rock develop intermittently with the depth of main powerhouse, and there is no Grade I or V surrounding rock distribution. Secondly, setting a smaller evaluation section is conducive to improve the accuracy of surrounding rock quality evaluation and better grasp the distribution of different grades of surrounding rock in the evaluation area.

scholarly journals Joint Investigation and 3D Visual Evaluation of Rock Mass Quality

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Haiping Yuan ◽  
Chenghao Chen ◽  
Yixian Wang ◽  
Hanbing Bian ◽  
Yan Liu
Keyword(s):  
Rock Mass ◽  
Quality Evaluation ◽  
Evaluation Method ◽  
Three Dimensional ◽  
Rock Mass Classification ◽  
National Standard ◽  
Ratio Method ◽  
Rock Mass Quality ◽  
Close Range ◽  
Mass Classification

In order to realize the high efficiency quality classification and three-dimensional visualization of engineering rock mass and to solve the technical difficulties of the traditional rock mass quality evaluation method such as high labor intensity, long process time consumption, many intervention processes such as scale measurement and manual calculation, and nonintuitive classification results, this paper puts forward a 3D visual rock mass quality evaluation method and system based on close-range photography, which optimizes the traditional rock mass quality evaluation method, makes the rock mass classification three-dimensional and visible, and realizes the estimation of unrevealed rock mass quality evaluation index. The research results show the following: (1) The method of storing joint information by close-range photography and extracting joint information by human-computer interaction improves the working efficiency and the process is safe and controllable compared with the traditional method of collecting fracture parameters. (2) Based on the statistical analysis of 97 groups of roadway survey data, the comprehensive statistical regression formula between BQ value of Chinese national standard and RMR value is given, and there is a good correlation between BQ value and RMR value of rock mass quality index. (3) Based on the power-inverse ratio method, the three-dimensional model of rock mass classification of the mine was established, and the cutting model obtained the current distribution diagram of rock mass quality grade, providing scientific reference for drilling, blasting, support, and other production design optimizations.

Fit Quality Evaluation and Fit Capability Analysis

1999 ◽  
Author(s):  
Y. Zhang ◽  
X. Daniel Fang
Keyword(s):  
Process Monitoring ◽  
Process Design ◽  
Quality Evaluation ◽  
Process Capability Indices ◽  
Analysis Method ◽  
Evaluation Measures ◽  
Capability Indices ◽  
Capability Analysis ◽  
The Relationship

Abstract A new measure for evaluating fit quality of mating parts via Fit Capability Indices (FCIs) is introduced as an interface between fit quality and process control of the mating parts. Fit Capability Analysis method is discussed based on the relationship between FCIs and Process Capability Indices (PCIs). A new statistical tolerancing approach for assuring predetermined fit quality is developed on the basis of fit quality evaluation measures and fit capability analysis, which can be used as a guideline to process design and process monitoring of the mating parts.

scholarly journals Matrix management interfers in yield and quality of cocoa seedlings

2018 ◽  
Vol 40 (3) ◽  
Author(s):  
Rafaela Alves Pereira ◽  
Gedeon Almeida Gomes Júnior ◽  
Eliandro Malta Rodrigues ◽  
George Andrade Sodré ◽  
Célio Kersul do Sacramento
Keyword(s):  
Quality Index ◽  
Quality Evaluation ◽  
Pearson Correlation ◽  
Dry Mass ◽  
Experimental Unit ◽  
Plant Management ◽  
Yield And Quality ◽  
Cocoa Seedlings ◽  
Dickson Quality Index

Abstract The influence of two managements on yield and quality of plagiotropic mini-cuttings of four cacao clones was evaluated. The design was completely randomized in a 4 x 2 factorial scheme with 4 clones x 2 mother plant management (apical pruning and bending), with 10 replicates and one plant as experimental unit. Seedlings used were propagated by rooting of semi-woody cuttings of plagiotropic branches and at seven months of age, two seedlings of each clone were transplanted to 12 L pots filled with organomineral substrate. After transplantation, the apex of one of the plants was cut based on the count of the first six leaves from the apex. For bending, stems were folded and horizontally fixed. The first collection of mini-cuttings was performed 30 days after transplantation and the others during the following seven months. The yield of mini-cuttings was estimated during collections and part was used for rooting and quality evaluation of seedlings. After 90 days, 10 mini-cuttings of each clone were evaluated for quality using the Dickson quality index (DQI). Another 10 rooted mini-cuttings were transplanted to 1.5 L polyethylene bags and kept in greenhouse for another 120 days until final quality evaluation at 210 days. Data were submitted to analysis of variance and Tukey test at 5% probability. Shapiro-Wilk normality test and Pearson correlation analysis were performed. bending was more efficient in the average production of mini-cuttings especially for BN 34 clone. The Dickson quality index was correlated with root dry mass, at both 90 and 210 days, and the bending technique was responsible for the best DQI. Variable height was not adequate to estimate the quality of cocoa seedlings.

Legitimizing basic research by evaluating quality

2010 ◽  
Vol 17 (1) ◽  
pp. 107-116 ◽  
Author(s):  
Rika Levy-Malmberg ◽  
Katie Eriksson
Keyword(s):  
Moral Responsibility ◽  
Future Development ◽  
Quality Evaluation ◽  
Academic Discipline ◽  
Basic Research ◽  
Evaluation Theory ◽  
Caring Science ◽  
The Relationship ◽  
Meaningful Interaction

The aim of this study was to use ethical arguments to strengthen the relationship between the concepts of legitimacy and evaluation. The analysis is based on the ethics of Levinas and Buber and is motivated by a sense of responsibility using dialogical ideology as a mediator. The main questions in this study consider the following: Does caring science as an independent academic discipline have the moral responsibility to develop a theory for evaluating the quality of basic research? and Will such a quality evaluation theory have a reasonable probability of introducing legitimization into caring science? On an ethical level, this study introduces a meaningful interaction inspired by social demands and is linked to the concept of research justification. Legitimization turns from an abstract idea to an achievable entity by an act. The act of evaluation has the likelihood of delegating legitimacy and empowers the foundation of caring science, which in turn will become a cornerstone of nursing. At this stage there is no intention to develop an evaluation theory, rather to create a meaningful discussion for the future development of an ethics-based theory.

scholarly journals Evaluation of open search methods based on theoretical mass spectra comparison

2021 ◽  
Vol 22 (S2) ◽  
Author(s):  
Albane Lysiak ◽  
Guillaume Fertin ◽  
Géraldine Jean ◽  
Dominique Tessier
Keyword(s):  
Mass Spectra ◽  
Quality Evaluation ◽  
Mass Difference ◽  
The Other ◽  
Color Classification ◽  
False Discovery ◽  
Theoretical Mass ◽  
Two Measures ◽  
The Relationship

Abstract Background Mass spectrometry remains the privileged method to characterize proteins. Nevertheless, most of the spectra generated by an experiment remain unidentified after their analysis, mostly because of the modifications they carry. Open Modification Search (OMS) methods offer a promising answer to this problem. However, assessing the quality of OMS identifications remains a difficult task. Methods Aiming at better understanding the relationship between (1) similarity of pairs of spectra provided by OMS methods and (2) relevance of their corresponding peptide sequences, we used a dataset composed of theoretical spectra only, on which we applied two OMS strategies. We also introduced two appropriately defined measures for evaluating the above mentioned spectra/sequence relevance in this context: one is a color classification representing the level of difficulty to retrieve the proper sequence of the peptide that generated the identified spectrum ; the other, called LIPR, is the proportion of common masses, in a given Peptide Spectrum Match (PSM), that represent dissimilar sequences. These two measures were also considered in conjunction with the False Discovery Rate (FDR). Results According to our measures, the strategy that selects the best candidate by taking the mass difference between two spectra into account yields better quality results. Besides, although the FDR remains an interesting indicator in OMS methods (as shown by LIPR), it is questionable: indeed, our color classification shows that a non negligible proportion of relevant spectra/sequence interpretations corresponds to PSMs coming from the decoy database. Conclusions The three above mentioned measures allowed us to clearly determine which of the two studied OMS strategies outperformed the other, both in terms of number of identifications and of accuracy of these identifications. Even though quality evaluation of PSMs in OMS methods remains challenging, the study of theoretical spectra is a favorable framework for going further in this direction.

scholarly journals Physical, technological and technical characteristics of the blasted rock mass in terms of energy intensity of the processes

2021 ◽  
Vol 303 ◽  
pp. 01034
Author(s):  
Ivan Panachev ◽  
Ilya Kuznetsov ◽  
Anastasia Shirokolobova
Keyword(s):  
Rock Mass ◽  
Energy Consumption ◽  
Specific Energy ◽  
Energy Intensity ◽  
Coal Mines ◽  
Specific Energy Consumption ◽  
Rock Blasting ◽  
Mining Equipment ◽  
The Relationship

Kuzbass coal mines are equipped with powerful mining equipment; it is CME excavator type with bucket capacity from 4.6 m3 to 20 m3. To evaluate the efficiency of the excavation processes, a universal criterion was used – the value of specific energy consumption (kW h/m3). The dependences of excavator efficiency on the quality of rock blasting, estimated by the diameter of the average piece in the shot pile, are obtained. The relationship between the efficiency of excavators CME - 4.6, CME – 8, CME – 12.5, CME – 20, their energy intensity and the diameter of an average piece in the shot pile is determined.

scholarly journals Diet Quality Index associated with Digital Food Guide: update and validation

2019 ◽  
Vol 35 (9) ◽  
Author(s):  
Simone Caivano ◽  
Fernando Antonio Basile Colugnati ◽  
Semíramis Martins Álvares Domene
Keyword(s):  
Diet Quality ◽  
Quality Index ◽  
Food Group ◽  
Harvard University ◽  
Group Score ◽  
Diet Quality Index ◽  
Index Components ◽  
Serving Sizes ◽  
The Relationship

Monitoring and assessing dietary intake may favor the promotion of healthy choices and the indexes that assess the quality of the diet contribute to this purpose. The Diet Quality Index associated with the Digital Food Guide (DQI-DFG) was developed from guidelines of the School of Public Health at Harvard University, adjusted for the Brazilian food habits. Based on new studies on prevention of chronic non-communicable diseases, the objective of this study was to improve and validate the DQI-DFG for a second version. The following psychometric properties were used: (a) content validation: consensus on healthy eating and DQI among experts; (b) construct validation: enhancement of a reference diet to determine recommended serving sizes and consumption ranges; correlation between each group score and energy value; comparative analyses between menu assessment by experts and DQI-DGF results to confirm the score criterion; (c) reliability: agreement between the result shown by the evaluators and the result presented by DQI-DFG; correlation between each food group score and total DQI score to understand the relationship between these variables. The energetic values do not influence the DQI score. There is a high correlation between the score attributed by experts and the result of DQI-DFG (r = 0.78 until r = 0.97). The Index components have a balanced score of influence in its final result (r = 0.49 until r = 0.10). Consensus result performed among experts legitimates the concepts that justify DQI-DFG. There was an agreement between menu quality evaluation by experts and the results shown by DQI-DFG.

scholarly journals Hubungan Derajat Keparahan Akne Vulgaris dengan Kualitas Hidup menggunakan Dermatology Life Quality Index (DLQI)

2020 ◽  
Vol 8 (2) ◽  
pp. 77-83
Author(s):  
Alvin Sachio ◽  
Vera Madonna Lumban Toruan ◽  
Yuniati
Keyword(s):  
Quality Of Life ◽  
Dermatology Life Quality Index ◽  
Quality Index ◽  
Acne Vulgaris ◽  
Life Quality ◽  
Observational Research ◽  
Life Quality Index ◽  
The Relationship ◽  
Severity Degree

Background: Quality of life is an individual's perception of his life in the context of culture and values ​​in a place of residence with the relationship of goals, expectations, standards and concerns. Acne is a problem that can have an impact on a person's quality of life because of the shame felt by sufferers. Purpose : To describe the relationship between severity degree of acne vulgaris with quality of life using the Dermatology Life Quality Index assessment. Methods : This research is an analytical observational research with cross sectional method and the sampling was chosen by purposive sampling. The sample size of this study was 60 respondents, assessing quality of life using the DLQI questionnaire instrument. Result : Statistical test data indicate that there is no relationship between the severity degree of acne vulgaris with quality of life (p = 0,101). Conclusion : There is no correlation between the severity of acne vulgaris with quality of life using the Dermatology Life Quality Index (DLQI) assessment.

The Logging Evaluation of the Relationship between Source Rock and Oil Layer Distribution in Southern Songliao Basin

2014 ◽  
Vol 962-965 ◽  
pp. 574-577
Author(s):  
Li Jun Xiu ◽  
He Ping Pan ◽  
Hao Xiu
Keyword(s):  
Source Rock ◽  
Quality Evaluation ◽  
Songliao Basin ◽  
Source Rocks ◽  
Source Control ◽  
Theory Theory ◽  
High Quality ◽  
The Relationship ◽  
Effective Source

At present, Most of the studies on source rocks is above the effective source rock identification and quality evaluation. But the spatial distribution of the high quality source rocks do not necessarily reflect the position of the layer. So, logging evaluation of the relationship between source rock and layer distributed in a region is necessary. In this paper 70 cores have selected from 4 wells in the first period of Qingshankou (q1), Songliao Basin, then get the experimental TOC value after core analysis. On the basis of source rock geochemical analysis, the author estimated the source rock TOC value with the ∆lgR method. As the distribution of high quality source rocks are clarified,the author draw a conclusion by researching on the relationship between the distribution of source rocks and layers which based on the "Source Control Theory" theory. Finally, it is found that the quality of the source rocks and layer distribution match well in both horizontal and vertical in this paper. This discovery is important for layer prediction and researches.

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