scholarly journals An Adaptive Bayesian Melding Method for Reliability Evaluation Via Limited Failure Data: An Application to the Servo Turret

2020 ◽  
Vol 10 (21) ◽  
pp. 7591
Author(s):  
Bo Sun ◽  
Zhaojun Yang ◽  
Narayanaswamy Balakrishnan ◽  
Chuanhai Chen ◽  
Hailong Tian ◽  
...  

In the early stage of product development, reliability evaluation is an indispensable step before launching a product onto the market. It is not realistic to evaluate the reliability of a new product by a host of reliability tests due to the limiting factors of time and test costs. Evaluating the reliability of products in a short time is a challenging problem. In this paper, an approach is proposed that combines a group of experts’ judgments and limited failure data. Novel features of this approach are that it can reflect various kinds of information without considering the individual weight and reduces aggregation error in the uncertainty quantification of multiple inconsistent pieces of information. First, an expert system is established by the Bayesian best–worst method and fuzzy logic inference, which collects and aggregates a group of expert opinions to estimate the reliability improvement factor. Then, an adaptive Bayesian melding method is investigated to generate a posterior by inaccurate prior knowledge and limited test data; this method is made more computationally efficient by implementing an improved sampling importance resampling algorithm. Finally, an application for the reliability evaluation of a subsystem of a CNC lathe is discussed to illustrate the framework, which is shown to validate the reasonability and robustness of our proposal.

2018 ◽  
Vol 1 (1) ◽  
pp. 236-247
Author(s):  
Divya Srivastava ◽  
Rajitha B. ◽  
Suneeta Agarwal

Diseases in leaves can cause the significant reduction in both quality and quantity of agricultural production. If early and accurate detection of disease/diseases in leaves can be automated, then the proper remedy can be taken timely. A simple and computationally efficient approach is presented in this paper for disease/diseases detection on leaves. Only detecting the disease is not beneficial without knowing the stage of disease thus the paper also determine the stage of disease/diseases by quantizing the affected of the leaves by using digital image processing and machine learning. Though there exists a variety of diseases on leaves, but the bacterial and fungal spots (Early Scorch, Late Scorch, and Leaf Spot) are the most prominent diseases found on leaves. Keeping this in mind the paper deals with the detection of Bacterial Blight and Fungal Spot both at an early stage (Early Scorch) and late stage (Late Scorch) on the variety of leaves. The proposed approach is divided into two phases, in the first phase, it identifies one or more disease/diseases existing on leaves. In the second phase, amount of area affected by the disease/diseases is calculated. The experimental results obtained showed 97% accuracy using the proposed approach.


Author(s):  
Yasunobu Iwai ◽  
Koichi Shinozaki ◽  
Daiki Tanaka

Abstract Compared with space parts, consumer parts are highly functional, low cost, compact and lightweight. Therefore, their increased usage in space applications is expected. Prior testing and evaluation on space applicability are necessary because consumer parts do not have quality guarantees for space application [1]. However, in the conventional reliability evaluation method, the test takes a long time, and the problem is that the robustness of the target sample can’t be evaluated in a short time. In this report, we apply to the latest TSOP PEM (Thin Small Outline Package Plastic Encapsulated Microcircuit) an evaluation method that combines preconditioning and HALT (Highly Accelerated Limit Test), which is a test method that causes failures in a short time under very severe environmental conditions. We show that this method can evaluate the robustness of TSOP PEMs including solder connections in a short time. In addition, the validity of this evaluation method for TSOP PEM is shown by comparing with the evaluation results of thermal shock test and life test, which are conventional reliability evaluation methods.


Author(s):  
A. U. Zamurayeva ◽  
Е. T. Supiyeva ◽  
B Sh. Orynbayeva

Relevance. The modern method of infiltration provides an opportunity to stop the spread of pathogenic bacteria and the development of caries at the white spot stage, replacing the destroyed enamel cells with special polymers having low viscosity and high penetrating ability. The stabilization of the process is achieved in a short time with the maximum safety of their tissues. Purpose. Treatment of initial tooth decay in children by infiltration, assessment of the effectiveness and advantages of modern technology. Materials and methods. Clinical examination was carried out according to generally accepted methods. Additionally, a laser diagnostic method was used using the KaVo DIAGNOdent device (Germany). The LLP Dentistry Center «Zhaik Dent» and the LLP «Concept» used the Icon system for the treatment of initial caries and after orthodontic treatment for 25 children with 54 teeth. Results. At the end of tooth treatment with the Icon infiltration method, parents and the child were given recommendations: from the next day, brush your teeth 2 times a day, rinse your mouth regularly after eating, do not drink drinks, products with coloring substances. To monitor the result of treatment, the child was prescribed for reexamination after 7-10 days, after one month, in the following periods – once a year.After working with the material of the Icon system, the authors noted the pronounced effects of the treatment of initial caries by the method of infiltration.Conclusions. 1. The method of infiltration is a modern and promising technology for the treatment of dental caries at an early stage without losing healthy tissues. 2. The Icon infiltration method makes it possible to stop the spread of pathogenic bacteria and develop tooth decay at the white spot stage, replacing the destroyed enamel cells with special polymers having low viscosity and high penetrating ability. 3. The stabilization of the carious process is achieved in a short time with the maximum preservation of the tooth's tissues. 


Author(s):  
Jinbao Zhang ◽  
Jaeyoung Lee

Abstract This study has two main objectives: (i) to analyse the effect of travel characteristics on the spreading of disease, and (ii) to determine the effect of COVID-19 on travel behaviour at the individual level. First, the study analyses the effect of passenger volume and the proportions of different modes of travel on the spread of COVID-19 in the early stage. The developed spatial autoregressive model shows that total passenger volume and proportions of air and railway passenger volumes are positively associated with the cumulative confirmed cases. Second, a questionnaire is analysed to determine changes in travel behaviour after COVID-19. The results indicate that the number of total trips considerably decreased. Public transport usage decreased by 20.5%, while private car usage increased by 6.4%. Then the factors affecting the changes in travel behaviour are analysed by logit models. The findings reveal significant factors, including gender, occupation and travel restriction. It is expected that the findings from this study would be helpful for management and control of traffic during a pandemic.


2020 ◽  
Vol 11 (1) ◽  
pp. 241
Author(s):  
Juliane Kuhl ◽  
Andreas Ding ◽  
Ngoc Tuan Ngo ◽  
Andres Braschkat ◽  
Jens Fiehler ◽  
...  

Personalized medical devices adapted to the anatomy of the individual promise greater treatment success for patients, thus increasing the individual value of the product. In order to cater to individual adaptations, however, medical device companies need to be able to handle a wide range of internal processes and components. These are here referred to collectively as the personalization workload. Consequently, support is required in order to evaluate how best to target product personalization. Since the approaches presented in the literature are not able to sufficiently meet this demand, this paper introduces a new method that can be used to define an appropriate variety level for a product family taking into account standardized, variant, and personalized attributes. The new method enables the identification and evaluation of personalizable attributes within an existing product family. The method is based on established steps and tools from the field of variant-oriented product design, and is applied using a flow diverter—an implant for the treatment of aneurysm diseases—as an example product. The personalization relevance and adaptation workload for the product characteristics that constitute the differentiating product properties were analyzed and compared in order to determine a tradeoff between customer value and personalization workload. This will consequently help companies to employ targeted, deliberate personalization when designing their product families by enabling them to factor variety-induced complexity and customer value into their thinking at an early stage, thus allowing them to critically evaluate a personalization project.


Author(s):  
Наталія Юріївна Бондар

The article deals with the influence of the archetype of the way on the formation of the personality in the novel Paper Towns by John Green. The purpose of this article is to determine the originality of the image of an American teenager and to identify the influence of the archetype of the way on the formation of the personality, as well as to consider the archetype of the way as a real path of the character in the novel Paper Towns by John Green, taking into account the individual author’s interpretation. This object of research has been chosen because through it one can comprehend the specifics of the psychology of a teenager and define the artistic features that distinguish the author’s stylistics and worldview. The comprehensive research methodology has been used in the work: the synthesis of the comparative historical method, holistic analysis, elements of mythopoetic and hermeneutic methods. In the novel Paper Towns by John Green mythopoetic consciousness presupposes ontological ambivalent intentions in the archetype of the child / teenager (good and evil children). The metaphorical extension of the archetype of the child / teenager has been revealed in this article. All the images of teenagers are given in the development, on the way to growing up. The originality of the archetype of the way here lies in the fact that it merges with the concepts of Space and Chaos, confirming the idea of the unity of mankind. The metaphors themselves are also peculiar, associated with the archetype of the way: inanimate strings, gradually turning into living blades of grass, intertwined with roots with all that exists. During the search for Margo, Quentin grows up significantly, becomes more tolerant to their friends, and he learns to take responsibility for him. The image of Margo is the image of a rebel against any lack of freedom that it is inevitable in the “golden cage”. It is also revealed how Quentin is influenced by the new world opened during his trips, and his personal environment: for example, Radar opens his eyes to the fact that he does not need to demand too much from others. Both Margo is changed (from a “paper” girl – to a real one) and Ben and Radar are changed (false interests go into the background; everyone learns to expose himself to risks and troubles for the sake of friendship and human salvation). Ben and Radar are also shown in the development, in a short time they learn to understand each other and distinguish false values from true ones. These changes occur with all the teenagers, regardless of their skin color and nationality, and such an interpretation of the insignificance of formal differences is also a new word of the author.


1982 ◽  
Vol 3 (4) ◽  
pp. 231-235 ◽  
Author(s):  
Ruth Engel

In this paper I hope to explain the reasons for developing a method to provide the individual with tools to cope with failure at an early stage of his life; additionally, the general principles of that method will be formulated. Obviously, the basic objective is ultimately aimed at conditioning the child's thinking towards development of different attitudes in relation to failure situations. Success of the method, in the long run, depends upon the repetition of similar techniques, at least during the first years of the child's schooling. Thus we tend to believe that if we ‘instil’ in the child the proposed way of relating, he will then be able to cope not only with failure in the future but also with pressures exerted by unskilled teachers in school, who may use failure as a threat. As an additional alternative there is proposed a general model of treating children who have not been trained at an earlier stage to deal with failure within the school framework.


2003 ◽  
Vol 15 (2) ◽  
pp. 144-148 ◽  
Author(s):  
Hua Linghu ◽  
Xiao-rong Xu ◽  
Yao-yu Mei ◽  
Jun-ying Tang ◽  
Liang-dan Tang ◽  
...  

2019 ◽  
Vol 31 (5) ◽  
pp. 1339-1344
Author(s):  
Baki Koleci

We, as individuals, continually through our lives, learn and acquire the knowledge, skill, and skill we expect to help us employ or apply appropriately in order to gain a living and secure our survival. Everyone wants to build a successful career with which he can be proud of his life. However, this is not always so easy and simple, it requires a lot of sacrifices, concessions, compromises with our partners, the family, close social relationships, and finally with ourselves. In this paper, the subject of the research is the determination of career development, career stages, career factors, then expert opinions, the difference between traditional and modern career views, goals pursued by individuals in the career, and so on, Career development can be seen as an experience of individuals (an internal career) and this is not related to an organization. Although the responsibility for career management is in the hands of individuals, individuals, however, organizations can play a key role in shaping and developing careers by providing help and providing support. Career development can not be pursued individually or separately from the personality as a whole, meaning it reflects on the context of life and the development of the person as a whole, not just personality as work. The main goal in career development is to realize the current and future needs and goals of the organization and individuals, which has to do more with developing employment opportunities and improving the skills needed for employment. Career success is reflected in the eyes of the individual and can be defined as a career pleasure through achieving personal goals related to the work, while at the same time enhancing the success and efficiency of the organization.


2019 ◽  
pp. 128-148 ◽  
Author(s):  
Miriam Noël Haidle

Cumulative culture is widely seen as a uniquely human characteristic involving distinct cognitive and behavioral performances. In searching for its origin, different factors have been suggested as crucial, based on comparative studies, and dates proposed as to when cumulative culture may have emerged in human evolution. This chapter reviews possible factors, suggesting that several are necessary, not only in the social sphere but also in the individual and environmental spheres. These interdependent factors have developed in three developmental dimensions (evolutionary-biological, ontogenetic-individual, and historical-social) in interaction with the specific environment. The interplay of basic factors and developmental dimensions shows a slow and gradual development of cumulative culture from its basis to simple and advanced donated culture. The onset of cumulative culture is concluded not to have been a single-trait event that occurred in a relatively short time but rather, the result of multifactorial and gradual processes that unfolded over millions of years.


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