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Flexible pavement longitudinal joint quality evaluation using non-destructive testing
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作者 Hamad Bin Muslim Syed Waqar Haider Lev Khazanovich 《Journal of Road Engineering》 2024年第2期189-202,共14页
Longitudinal joint construction quality is critical to the life of flexible pavements.Maintaining deteriorated longitudinal joints has become a challenge for many highway agencies.Improving the joint's quality thr... Longitudinal joint construction quality is critical to the life of flexible pavements.Maintaining deteriorated longitudinal joints has become a challenge for many highway agencies.Improving the joint's quality through better compaction during construction can help achieve flexible pavements with longer service lives and less maintenance.Current quality control(QC)and quality assurance(QA)plans provide limited coverage.Consequently,the risk of missing areas with poor joint compaction is significant.A density profiling system(DPS)is a non-destructive alternative to conventional destructive evaluation methods.It can provide quick and continuous real-time coverage of the compaction during construction in dielectrics.The paper presents several case studies comparing various types of longitudinal joints and demonstrating the use of DPS to evaluate the joint's compaction quality.The paper shows that dielectric measurements can provide valuable insight into the ability of various construction techniques to achieve adequate levels of compaction at the longitudinal joint.The paper proposes a dielectric-based longitudinal joint quality index(LJQI)to evaluate the relative compaction of the joint during construction.It also shows that adopting DPS for assessing the compaction of longitudinal joints can minimize the risk of agencies accepting poorly constructed joints,identify locations of poor quality during construction,and achieve better-performing flexible pavements. 展开更多
关键词 Sustainable pavements Dielectric/density profiling system quality assurance Non-destructive testing Asphalt longitudinal joint
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A novel method for geometric quality assurance of rock joint replicas in direct shear testing-Part 2:Validation and mechanical replicability
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作者 J.Larsson F.Johansson +3 位作者 D.Mas Ivars E.Johnson M.Flansbjer N.W.Portal 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2023年第9期2209-2223,共15页
Each rock joint is unique by nature which means that utilization of replicas in direct shear tests is required in experimental parameter studies.However,a method to acquire knowledge about the ability of the replicas ... Each rock joint is unique by nature which means that utilization of replicas in direct shear tests is required in experimental parameter studies.However,a method to acquire knowledge about the ability of the replicas to imitate the shear mechanical behavior of the rock joint and their dispersion in direct shear testing is lacking.In this study,a novel method is presented for geometric quality assurance of replicas.The aim is to facilitate generation of high-quality direct shear testing data as a prerequisite for reliable subsequent analyses of the results.In Part 1 of this study,two quality assurance parameters,smf and V_(Hp100),are derived and their usefulness for evaluation of geometric deviations,i.e.geometric reproducibility,is shown.In Part 2,the parameters are validated by showing a correlation between the parameters and the shear mechanical behavior,which qualifies the parameters for usage in the quality assurance method.Unique results from direct shear tests presenting comparisons between replicas and the rock joint show that replicas fulfilling proposed threshold values of σ_(mf)<0.06 mm and|V_(Hp100)|<0.2 mm have a narrow dispersion and imitate the shear mechanical behavior of the rock joint in all aspects apart from having a slightly lower peak shear strength.The wear in these replicas,which have similar morphology as the rock joint,is in the same areas as in the rock joint.The wear is slightly larger in the rock joint and therefore the discrepancy in peak shear strength derives from differences in material properties,possibly from differences in toughness.It is shown by application of the suggested method that the quality assured replicas manufactured following the process employed in this study phenomenologically capture the shear strength characteristics,which makes them useful in parameter studies. 展开更多
关键词 Three-dimensional(3D)scanning Contact area measurements Direct shear testing Geometric quality assurance Mechanical replicability Replicas Rock joint
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Discussion on the Status Quo of Non-Destructive Testing Technology in Highway Engineering and Strategies of Improving the Quality of Testing
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作者 Fengyue Xu Junlong Xie Jie Gao 《Journal of World Architecture》 2023年第4期29-33,共5页
Highway test and detection technology play a very important role in controlling the quality of road and bridge engineering and improving the maintenance of roads and bridges.The study of highway bridge test detection ... Highway test and detection technology play a very important role in controlling the quality of road and bridge engineering and improving the maintenance of roads and bridges.The study of highway bridge test detection technology is both theoretically and practically useful.Road and bridge test and detection is a complicated task.With the development of science and technology,highway and bridge engineering test and detection technology has also made great progress.The continuous improvement of test and detection technology has brought good social benefits to road and bridge construction.This article discusses the problems in test and detection technology of highway bridges and how to improve the quality of test and detection. 展开更多
关键词 Highway engineering Non-destructive testing testing technology quality improvement
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Application of Non-Destructive Testing Technology in Quality Testing and Control of Water Conservancy Projects
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作者 Yang Zhou 《Journal of World Architecture》 2023年第2期41-46,共6页
In view of social development,the demand for water conservancy engineering applications continues to increase.The number and scale of water conservancy projects in China have been in a state of continuous expansion in... In view of social development,the demand for water conservancy engineering applications continues to increase.The number and scale of water conservancy projects in China have been in a state of continuous expansion in recent years.As a result,how to achieve efficient testing and effective control of the quality of water conservancy projects has always been a topic of discussion in the field of water conservancy engineering in our country.This paper summarizes the application of non-destructive testing technology in the quality testing and control of water conservancy projects.On the basis of explaining the connotation and application advantages of non-destructive testing technology,the non-destructive testing application strategies for concrete strength,steel corrosion and shallow cracks in water conservancy projects were studied. 展开更多
关键词 Hydraulic engineering Non-destructive testing quality inspection quality control
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Strategies for Strengthening Highway Construction Testing and Quality Control
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作者 Linli Ni 《Journal of Architectural Research and Development》 2023年第3期25-30,共6页
In recent years,the scale of China’s highway projects have been expanding.However,in real life,road construction projects in some places have not passed professional and rigorous inspections,resulting in various qual... In recent years,the scale of China’s highway projects have been expanding.However,in real life,road construction projects in some places have not passed professional and rigorous inspections,resulting in various quality problems,and seriously affecting the safety of drivers and pedestrians.This paper analyzes the current situation of highway engineering test and detection,expounds the application of new technologies for highway engineering test and detection.In this paper,a case study was carried out on ground penetrating radar(GPR),which aims to improve highway engineering test and detection and provide reference for reducing highway safety risks. 展开更多
关键词 Highway engineering test detection quality control
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Importance of Proficiency Testing in Water Quality Monitoring 被引量:2
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作者 郭正 向哲涛 宋华力 《Agricultural Science & Technology》 CAS 2014年第12期2201-2203,共3页
The monitoring data is undoubtedly important to the water quality monitor- ing department. The proficiency testing is an important way to improve the monitor- ing capacity and enhance the quality management of laborat... The monitoring data is undoubtedly important to the water quality monitor- ing department. The proficiency testing is an important way to improve the monitor- ing capacity and enhance the quality management of laboratories. It plays an impor- tant role in ensuring the accuracy, integrity and comparability of monitoring data. In this paper, the positive role of proficiency testing in the water quality monitoring was analyzed. In addition, how to improve the water quality monitoring capacity and the quality management level of laboratories through the proficiency testing was also discussed. 展开更多
关键词 Proficiency testing Water quality monitoring Management level
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Non-destructive testing and pre-warning analysis on the quality of bolt support in deep roadways of mining districts 被引量:13
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作者 Zhang Houquan Miao Xiexing +2 位作者 Zhang Guimin Wu Yu Chen Yanlong 《International Journal of Mining Science and Technology》 SCIE EI CSCD 2017年第6期989-998,共10页
The bolt support quality of coal roadways is one of the important factors for the efficiency and security of coal production. By means of a self-developed technique and equipment of random non-destructive testing, non... The bolt support quality of coal roadways is one of the important factors for the efficiency and security of coal production. By means of a self-developed technique and equipment of random non-destructive testing, non-destructive detection and pre-warning analysis on the quality of bolt support in deep roadways of mining districts were performed in a number of mining areas. The measured data were obtained in the detection instances of abnormal in-situ stress and support invalidation etc. The corresponding relation between axial bolt load variation and roadway surrounding rock deformation and stability was summarized in different mining service stages. Pre-warning technology of roadway surrounding rock stability is proposed based on the detection of axial bolt load. Meanwhile, pre-warning indicators of axial bolt load in different mining service stages are offered and some successful pre-warning cases are also illustrated.The research results show that the change rules of axial bolt load in different mining service stages are quite similar in different mining areas. The change of axial bolt load is in accord with the adjustment of surrounding rock stress, which can consequently reflect the deformation and stability state of roadway surrounding rock. Through the detection of axial bolt load in different sections of roadways, the status of real-time bolt support quality can be reflected; meanwhile, the rationality of bolt support design can be evaluated which provides reference for bolting parameters optimization. 展开更多
关键词 Deep roadways BOLT support quality RANDOM NONDESTRUCTIVE testing SURROUNDING ROCK stability Prediction and pre-warning
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RAPID NONDESTRUCTIVE TESTING OF HEAT-TREATMENT QUALITY OF 2014 ALUMINIUM ALLOY 被引量:4
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作者 Fan, Jingyun Wan, Jing +1 位作者 He, Yunbin Wan, Guoqing 《中国有色金属学会会刊:英文版》 EI CSCD 1999年第1期13-18,共6页
1INTRODUCTIONSincethepaper“Rapid,NondestructiveAndQuantitativeTestingofHardnesofAluminiumaloys”waspublished... 1INTRODUCTIONSincethepaper“Rapid,NondestructiveAndQuantitativeTestingofHardnesofAluminiumaloys”waspublished[1],manyreadersha... 展开更多
关键词 aluminium ALLOY HEAT treatment quality NONDESTRUCTIVE testing
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Data Quality Control Method of a New Drifting Observation Technology Named Drifting Air-Sea Interface Buoy
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作者 LI Shuo WANG Bin +3 位作者 DENG Zeng’an WU Baoqin ZHU Xiande CHEN Zhaohui 《Journal of Ocean University of China》 CAS CSCD 2024年第1期11-22,共12页
An integral quality control(QC)procedure that integrates various QC methods and considers the design indexes and operational status of the instruments for the observations of drifting air-sea interface buoy was develo... An integral quality control(QC)procedure that integrates various QC methods and considers the design indexes and operational status of the instruments for the observations of drifting air-sea interface buoy was developed in the order of basic in-spection followed by targeted QC.The innovative method of combining a moving Hampel filter and local anomaly detection com-plies with statistical laws and physical processes,which guarantees the QC performance of meteorological variables.Two sets of observation data were used to verify the applicability and effectiveness of the QC procedure,and the effect was evaluated using the observations of the Kuroshio Extension Observatory buoy as the reference.The results showed that the outliers in the time series can be correctly identified and processed,and the quality of data improved significantly.The linear correlation between the quality-controlled observations and the reference increased,and the difference decreased.The correlation coefficient of wind speed before and after QC increased from 0.77 to 0.82,and the maximum absolute error decreased by approximately 2.8ms^(-1).In addition,air pressure and relative humidity were optimized by 10^(-3)–10^(-2) orders of magnitude.For the sea surface temperature,the weight of coefficients of the continuity test algorithm was optimized based on the sea area of data acquisition,which effectively expanded the applicability of the algorithm. 展开更多
关键词 drifting air-sea interface buoy quality control oceanic variables meteorological variables continuity test
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The Accuracy Levels of Vehicle Detectors Commonly Used in Korea Based on the Results of Quality Certification Test
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作者 Sang Hyup Lee 《Journal of Traffic and Transportation Engineering》 2023年第4期172-178,共7页
The Ministry of Land, Infrastructure and Transport of Korea introduced the ITS system performance evaluation about six and a half years ago. The main purpose is to make sure that accurate and reliable real-time traffi... The Ministry of Land, Infrastructure and Transport of Korea introduced the ITS system performance evaluation about six and a half years ago. The main purpose is to make sure that accurate and reliable real-time traffic data are collected from the ITS system installed. There are three types of performance evaluations, which are Quality Certification Test, Pre-Delivery Test and Periodic Check in Operation. In this paper the accuracy levels of vehicle detectors commonly used in Korea are analyzed based on the results of quality certification tests conducted during 2008-2012. The test items consist of volume, speed and occupancy. The analysis shows that loop detectors have the best levels of accuracy in all three test items and their levels of accuracy have been steady. Video image detectors do not have so good levels of accuracy as loop detectors, but the levels of accuracy have improved as time passes. Radar detectors do not have good levels of accuracy. However, their levels of accuracy have improved as time passes. The last vehicle detectors, geomagnetism detectors have the worst accuracy in the occupancy item. 展开更多
关键词 Performance evaluation accuracy level vehicle detector quality certification test
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Micro-destructive assessment of subgrade compaction quality using ultrasonic pulse velocity
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作者 Xuefei Wang Xuping Dong +3 位作者 Xiangdong Li Jianmin Zhang Guowei Ma Jiale Li 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2024年第11期4782-4797,共16页
The ultrasonic pulse velocity(UPV)correlates significantly with the density and pore size of subgrade filling materials.This research conducts numerous Proctor and UPV tests to examine how moisture and rock content af... The ultrasonic pulse velocity(UPV)correlates significantly with the density and pore size of subgrade filling materials.This research conducts numerous Proctor and UPV tests to examine how moisture and rock content affect compaction quality.The study measures the changes in UPV across dry density and compaction characteristics.The compacted specimens exhibit distinct microstructures and mechanical properties along the dry and wet sides of the compaction curve,primarily influenced by internal water molecules.The maximum dry density exhibits a positive correlation with the rock content,while the optimal moisture content demonstrates an inverse relationship.As the rock content increases,the relative error of UPV measurement rises.The UPV follows a hump-shaped pattern with the initial moisture content.Three intelligent models are established to forecast dry density.The measure of UPV and PSO-BP-NN model quickly assesses compaction quality. 展开更多
关键词 SUBGRADE Compaction quality Ultrasonic pulse velocity(UPV) Intelligent model Proctor test Micro-destructive evaluation
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External Quality Assurance Scheme in a National Reference Laboratory for HIV Testing in South India
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作者 Kamala Mary Sushi Thatchinamoorthy Gopal +2 位作者 Saramma Mini Jacob Ganesan Arumugam Anitha Durairaj 《World Journal of AIDS》 2012年第3期222-225,共4页
Background: The Department of Experimental Medicine functions as the National Reference Laboratory (NRL) for HIV testing covering 11 Medical Colleges (State Reference Laboratories SRL) & 723 subcenters i.e. Integr... Background: The Department of Experimental Medicine functions as the National Reference Laboratory (NRL) for HIV testing covering 11 Medical Colleges (State Reference Laboratories SRL) & 723 subcenters i.e. Integrated Counseling & Testing Centres and Blood Banks. The External Quality Assurance Scheme (EQAS) in NRL implements Quality Control (QC) Testing, Proficiency panel testing and training programs. Materials & Method: 9419 samples (4393 HIV negative/5026 HIV positive) were tested for QC. All the samples were tested using HIV rapid test (CombAids) and HIV positives alone were tested using Tridot and EIA Comb. The QC samples consisted of 20% negative and all positives. All the 723 subcenters were provided with 5 coded plasma samples (3 reactive & 2 negative) for proficiency testing using rapid tests. The aliquot panel (500 μl) were provided twice a year for testing to monitor the laboratory performance. Results: Out of 9419 samples tested for QC, 9371 (99.49%) reported correct results and 48 (0.50%) discordant results. Out of 48 samples 26 (0.27%) were false positives and 22 (0.23%) false negative. Mislabeling, sample contamination, leaking vials, transcriptional errors, tests that were not performed correctly were identified. For proficiency testing 91.8% reported test results. 645 (97.13%) reported correct results & 19 (2.86%) incorrect results. Out of 19 samples 7 (1.05%) were false positive & 12 (1.80%) were false negative. Hands on training were provided and the 19 discordant centers reported correct results on retesting. Conclusion: Significant progress in establishing a well coordinated HIV Laboratory network of NRL and SRLs had been developed. However the HIV testing and Quality Assurance needs to be strengthened towards certification. 展开更多
关键词 quality ASSURANCE HIV testing SOUTH INDIA
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Nondestructive Testing Techniques for Quality Detection of Meats 被引量:1
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作者 KONG Xianqin HUANG Suzhen 《肉类研究》 2009年第2期89-91,共3页
关键词 肉类 检测方法 食品工业 食品质量 产品质量
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Re-Testing in Batch Testing Model Based on Quality Control Process for Proportion Estimation
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作者 Ronald Waliaula Wanyonyi Olivia Wanjeri Mwangi Charles Wambugu Mwangi 《Open Journal of Statistics》 2021年第1期123-136,共14页
The quality of products manufactured or procured by organizations is an important aspect of their survival in the global market. The quality control processes put in place by organizations can be resource-intensive bu... The quality of products manufactured or procured by organizations is an important aspect of their survival in the global market. The quality control processes put in place by organizations can be resource-intensive but substantial savings can be realized by using acceptance sampling in conjunction with batch testing. This paper considers the batch testing model based on the quality control process where batches that test positive are re-tested. The results show that re-testing greatly improves the efficiency over one stage batch testing based on quality control. This is observed using Asymptotic Relative Efficiency (ARE), where for values of </span><i><span style="font-family:Verdana;">p</span></i><span style="font-family:Verdana;"> computed ARE > 1 implying that our estimator has a smaller variance than the one-stage batch testing. Also, it was found that the model is more efficient than the classical two-stage batch testing for relatively high values of proportion. 展开更多
关键词 quality Control Batch testing Cut Off Value PROPORTION Re-testing
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The Research Progress of Nondestructive Testing Technology in the Detection of Egg Quality
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作者 WU Jian-hu WANG Xiang-dong YU You-wei 《Animal Husbandry and Feed Science》 CAS 2013年第3期131-134,共4页
[Objective]The aim was to improve the quality of the egg in favour of producers and business operators according to the market demand to take scientific feeding and management.[Methods]This paper discussed the researc... [Objective]The aim was to improve the quality of the egg in favour of producers and business operators according to the market demand to take scientific feeding and management.[Methods]This paper discussed the research progress of using machine vision,optical properties,and acoustic resonance technology in the egg quality nondestructive testing. [Results]Egg quality indicators directly affect their edible quality and quality levels. [Conclusion]Egg quality test has practical value and practical significance. 展开更多
关键词 Eggs quality Non-destructive testing
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Subjective Cognitive Concerns and Attitudes toward Genetic Testing Are Associated with Depressive Symptoms and Quality of Life after Genetic Testing for the Cerebral Cavernous Malformation Common Hispanic Mutation (CCM1)
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作者 Richard Campbell Christine L.Petranovich +2 位作者 Savannah Cheek Leslie Morrison Blaine Hart 《Journal of Behavioral and Brain Science》 2020年第2期118-127,共10页
Purpose: This study aimed to characterize mood and quality of life and to examine the associations of these areas with subjective cognitive concerns and attitudes toward genetic testing for the Common Hispanic Mutatio... Purpose: This study aimed to characterize mood and quality of life and to examine the associations of these areas with subjective cognitive concerns and attitudes toward genetic testing for the Common Hispanic Mutation, a gene that has been associated with increased risk for CCM1. Method: Fifty-four adults with previous genetic testing for the Common Hispanic Mutation completed a mail survey that included assessments of the above identified areas. Results: Self-reported depressive symptoms and quality of life did not differ between those with positive and negative genetic test results. The negative group expressed a more favorable attitude toward genetic testing (p p = 0.06). Using generalized linear regression, more subjective cognitive concerns were associated with poorer quality of life and more depressive symptoms (p p Conclusions: Subjective cognitive concerns and negative attitudes toward genetic testing may influence emotional well-being after genetic testing for the Common Hispanic Mutation. Additional research is needed that uses objective neuropsychological measures to understand the associations of subjective cognitive concerns, emotional well-being, and cognitive test performance in individuals with CCM1. There is also a need for research that focuses on protective factors and resiliency following genetic testing for CCM1 and the development of mental health interventions to preempt psychosocial difficulties. 展开更多
关键词 quality of Life DEPRESSION Genetic testing SUBJECTIVE COGNITIVE CONCERNS
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Health Evaluation for Hypertensive Population Using Exercise Testing and Health-related Quality of Life Questionnaire
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作者 郝云玲 崔树起 +2 位作者 王苏中 李新胜 白净 《South China Journal of Cardiology》 CAS 2007年第1期50-56,共7页
Objectives This study aims to assess the impacts of hypertension on health-related quality of life (HRQOL), as well as cardiovascular functional status (CVFS). Methods An instrument was presented based on WHOQOL-BREF ... Objectives This study aims to assess the impacts of hypertension on health-related quality of life (HRQOL), as well as cardiovascular functional status (CVFS). Methods An instrument was presented based on WHOQOL-BREF and SP-16 questionnaire and exercise testing. 57 normotensive and 76 hypertensive subjects aged 35-65 year-old participated the health survey using this instrument. Based on the exercise testing results of the two groups, a discriminate function was established and used to investigate cardiovascular risk factors for hypertensive population. Results The results showed that persons with hypertension rated significantly lower scores on physical health (i.e. limitation in performing daily activities and problems with work or mobility) than did normotensives (P < 0.01). The discriminant score obtained from the exercise testing results was capable of reflecting the impacts of hypertension on CVFS. Conclusions The method presented in this paper provides a more powerful tool to estimate the effects of health interventions and medical therapy for hypertensive population than just self-rated HRQOL questionnaire. 展开更多
关键词 Hypertension Exercise testing Health-related quality of life Cardiovascular functional status
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QualiTeam: A Support Tool When Learning Software Quality and Testing Concepts
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作者 Jorge Cervantes-Ojeda María del Carmen Gómez-Fuentes 《Journal of Software Engineering and Applications》 2022年第1期1-17,共17页
QualiTeam is a web application to support the teaching-learning process on Software Quality Assurance, Quality Control and Testing introductory concepts. It has two main objectives: to facilitate the understanding of ... QualiTeam is a web application to support the teaching-learning process on Software Quality Assurance, Quality Control and Testing introductory concepts. It has two main objectives: to facilitate the understanding of concepts learned in theory and to facilitate the monitoring of SW projects that students develop. The system gives the teacher control and the students a guide on the activities that must be carried out throughout a software project development. QualiTeam is a tool conceived to help in the challenge of providing students with concrete examples with which they can practice and clarify the topics taught in the classroom. With it, students can apply concepts that, in the initial training of a software engineer, are generally taught only at a theoretical level such as: review process, change requests, trouble reports, document version control and testing documentation management. QualiTeam is free and available online. It has been in operation for 5 years, through which improvements have been made until achieving a quite stable version. 展开更多
关键词 Software Engineering Education Review Process testing Documentation Teaching of SW quality Assurance
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Quality and Testing Standards on Rice Production in China and Development Strategies
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作者 XIE LiHong CHEN Neng DUAN BinWu 《China Standardization》 2006年第3期16-20,共5页
China is the biggest country of rice production and consumption in the world;more than 50% of the population feeds chiefly on rice. The quality of rice and its role as a staplefood carry much weight. The rice qualitie... China is the biggest country of rice production and consumption in the world;more than 50% of the population feeds chiefly on rice. The quality of rice and its role as a staplefood carry much weight. The rice qualities are those aspects concerning processing, appearance,cooking, nutrition and safety of the product. The study, formulation and implementation of standardson rice qualities and testing bear heavily on the improving of rice qualities, human health,substitution of rice varieties, promoting quality rice production and regulating rice market. 展开更多
关键词 RATE quality and testing Standards on Rice Production in China and Development Strategies
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Test of Feeding Dairy Cows with Chinese Herbal Additive for Improving Production and Quality of Milk 被引量:1
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作者 孙晓萍 刘建斌 李思敏 《Agricultural Science & Technology》 CAS 2017年第4期671-672,共2页
At Baiyin dairy farm, the Chinese herbal additive was added into feed which was then fed to dairy cows from August to October, 2014, and the changes in milk production and quality were observed. The test showed that t... At Baiyin dairy farm, the Chinese herbal additive was added into feed which was then fed to dairy cows from August to October, 2014, and the changes in milk production and quality were observed. The test showed that the additive added into the feed had obvious milk-increasing effect, the milk production was im- proved by 12.67%-17.26%, and the milk quality was improved. The additive has the effects of preventing miscarriage, expelling parasite and preventing diseases. The nutritional components in the feed additive were determined, and the results showed that the contents of protein, crude fat, Ca and P in the additive were 12.29%, 2.66%, 1.8% and 0.22%, respectively. 展开更多
关键词 Chinese herb Feed additive Milk production and quality test
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