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Статті в журналах з теми "Quadratic risk quality assessment criterion"
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Gurina, Anastasiya O., and Vladimir L. Eliseev. "The Classification Quality Assessment Criterion Outside a Training Set." Vestnik MEI, no. 1 (2022): 98–110. http://dx.doi.org/10.24160/1993-6982-2022-1-98-110.
Повний текст джерелаАнотація:
The article addresses a commonly encountered problem of classification based on machine learning models. Given that attempts to classify objects outside the training sample are prone to yield unpredictable results, the classifiers may operate incorrectly on new data and may also be vulnerable to adversarial attacks. It is conjectured that these problems can be avoided provided that a sufficiently complete assessment of the classifier quality is made. The effectiveness of applying the conventional approach to estimating the classification quality is analyzed. Disadvantages of the conventional quality indicators, which do not allow one to evaluate the risk of errors and degree of machine learning model susceptibility to adversarial attacks, are described. А new classification quality criterion is proposed, which includes four characteristics: Excess, Deficit, Coating, and Approx (EDCA). The characteristics are quantified based on the ratio between the size of the space occupied by the training sample and the results of the classification of all points of the discretized space of features in the working range of their values. An experimental study for visual assessment and comparison of the quality of two multiclass SVM classifiers on characteristic synthetic data sets using the conventional and proposed quality indicators is carried out. The effectiveness and advantage of the newly introduced indicators in comparison with the conventional ones is demonstrated. Good interpretability of the quality indicator values, as well as the subjective consistency between the metrics and expected results from comparison of two SVM classifiers is confirmed. There is a reason to believe that application of the new approach to quality assessment will make it possible to construct more reliable classifiers based on machine learning.
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Baran, Irina, Mihaela Stela Georgescu, Laura Dumitrescu, Irina Bliuc, and Radu Aurel Pescaru. "The Surface Temperature Factor - An Assessment Criterion of Superficial Condensation Risk." Advanced Engineering Forum 21 (March 2017): 497–505. http://dx.doi.org/10.4028/www.scientific.net/aef.21.497.
Повний текст джерелаАнотація:
The emergence of condense phenomenon, generally associated with the mould, on the inner surface of the closing elements affects not only the finishing works quality, but also the comfort conditions and, not least, the occupants’ health. The phenomenon is caused by the simultaneous action of several categories of factors. If factors related to the design and structure of closing elements can be controlled by proper design and execution respecting the quality requirements, those related to users’ behaviour and to indoor and outdoor climate conditions, have a variable and random character. Hence there is the possibility that all or most of parameters, that reflect the action of these factors simultaneously, reach values that can cause mould and condensation on the surface. In these circumstances we can speak of a risk level defined as the possibility of producing an undesirable event. The risk assessment involves the precise definition of it and finding a way to calculate how often such an event may occur under particular conditions. One of the criteria to be taken into account to estimate the risk of superficial condensation is the temperature factor. The effective value of this criterion is influenced by several categories of factors that refer to the indoor climate conditions influenced by users’ behaviour, constructive and architectural features and outdoor climate. The objective of this paper is to integrate a phenomenological approach of producing the surface condensation and mould in a complex analysis, through this global criterion, using the concept of "risk”.
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Beiras, R., and T. Tato. "Marine environmental risk assessment and acute water quality criterion for pentachlorophenol in coastal waters." Ecotoxicology 27, no. 7 (April 7, 2018): 803–8. http://dx.doi.org/10.1007/s10646-018-1930-8.
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Qu, Qiang, Ming Qi Chang, Lei Xu, Yue Wang, and Shao Hua Lu. "Support Vector Machine-Based Aqueduct Safety Assessment." Advanced Materials Research 368-373 (October 2011): 531–36. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.531.
Повний текст джерелаАнотація:
According to water power, structure and foundation conditions of aqueduct, it has established aqueduct safety assessment indicator system and standards. Based on statistical learning theory, support vector machine shifts the learning problems into a convex quadratic programming problem with structural risk minimization criterion, which could get the global optimal solution, and be applicable to solving the small sample, nonlinearity classification and regression problems. In order to evaluate the safety condition of aqueduct, it has established the aqueduct safety assessment model which is based on support vector machine. It has divided safety standards into normal, basically normal, abnormal and dangerous. According to the aqueduct safety assessment standards and respective evaluation level, the sample set is generated randomly, which is used to build a pair of classifier with many support vectors. The results show that the method is feasible, and it has a good application prospect in irrigation district canal building safety assessment.
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E. Worden, Robert, Christopher Harris, and Sarah J. McLean. "Risk assessment and risk management in policing." Policing: An International Journal of Police Strategies & Management 37, no. 2 (May 13, 2014): 239–58. http://dx.doi.org/10.1108/pijpsm-12-2012-0088.
Повний текст джерелаАнотація:
Purpose – The purpose of this paper is to critique contemporary tools for assessing and managing the risk of police misconduct and suggest directions for their improvement. Design/methodology/approach – The paper draws on extant literature, synthesizing several lines of inquiry to summarize what the authors know about patterns of police misconduct, and what the authors know about assessing and managing police misconduct. Then the paper draws from the literature on offender risk assessment in criminal justice to draw lessons for assessing and managing the risk of police misconduct. Findings – The authors found that there is good reason to believe that the tools used to assess the risk of misconduct make suboptimal predictions about officer performance because they rely on limited information of dubious value, but also that the predictive models on which the tools are based could be improved by better emulating procedures for assessing offenders’ risk of recidivism. Research limitations/implications – Future research should examine cross-sectional and longitudinal patterns of misconduct and associations between risk-related outputs and enforcement activity, develop better measures of criterion variables, and evaluate the predictive accuracy of risk assessment tools. Practical implications – Police managers should make better use of the information available to them, improve the quantity and quality of information if feasible, and cooperate in the necessary research. Originality/value – This paper offers a new synthesis of extant research to demonstrate the limitations of contemporary provisions for assessing the risk of police misconduct, and potential avenues for useful research and improved practice.
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Roy, A. K., and S. W. Tsai. "Design of Thick Composite Cylinders." Journal of Pressure Vessel Technology 110, no. 3 (August 1, 1988): 255–62. http://dx.doi.org/10.1115/1.3265597.
Повний текст джерелаАнотація:
A simple and efficient design method for thick composite cylinders is presented. Micromechanics and macromechanics are integrated by simple relations and the integrated micro and macromechanics approach has been adopted to enable the designers to instantly study the sensitivity of the micromechanical variables on the final design. The stress analysis is based on 3-dimensional elasticity by considering the cylinder in the state of generalized plane strain. The analysis for both open-ended (pipes) and closed-ended (pressure vessels) cylinders subjected to internal and external pressures and axial load is presented. The failure of the cylinders is predicted by using a 3-dimensional quadratic failure criterion. A degradation model is used to calculate burst pressures and the calculated burst pressures agree very well with the available experimental results, for both thin and thick cylinders. In optimizing multilayer cylinders, the 3-D quadratic criterion enables one to obtain the optimal layer sequence very easily. It is found that the layer sequence is very critical in optimizing, in particular, thick cylinders. In addition, the design parameters and material use efficiency of multilayer closed cylinders subjected to internal pressure have also been studied.
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Valitova, Iuliia, Tatiana Trofimova, Tatiana Simankina, and Elena Stein. "Risk assessment related to the choice of contractors performing the job." MATEC Web of Conferences 170 (2018): 01068. http://dx.doi.org/10.1051/matecconf/201817001068.
Повний текст джерелаАнотація:
Construction and investment projects inherent risks in an extremely wide range of human activity fields. An analysis of risks from the viewpoint of management and mitigation is conducted in this article. Particular attention is paid to the analysis of risk events related to the choice of an unqualified contractors performing the job. The compliance of duration implementation project, the budget amount, and the quality of performed work depend on this choice. The contractors risk assessment methods analysis showed that besides the overall criterion for all methods connected to the cost of work it is vital to take into account the qualifications, reputation, material and technical base of a contractor, the time and quality of the work performed previously. Existing methods with criteria of the choice of contractors performing the job are considered. The universal methodology with a set of criteria that satisfies all construction process participants, and based on publicly accessible information about companies and their experience is essential.
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Wang, Zhi-Ming, and Xia Yu. "Log-linear process modeling for repairable systems with time trends and its applications in reliability assessment of numerically controlled machine tools." Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability 227, no. 1 (September 25, 2012): 55–65. http://dx.doi.org/10.1177/1748006x12460633.
Повний текст джерелаАнотація:
Two non-homogeneous Poisson processes including the power law process and the log-linear process with reliability improvement or deterioration are analyzed. Based on Akaike information criterion and Bayesian information criterion, the best model of failure data is presented. The point maximum likelihood and interval estimators of the parameters, as well as seven reliability indices of the log-linear process model, such as cumulative mean time between failures, cumulative number of failures, reliability at a given time, and warranty time given reliability are given. In tests for failure time trends, both the graphical methods, including the cumulative failures versus time plot and the total-time-on-test plot, and the analytical methods including the Laplace, the Military Handbook, and the Lewis–Robinson tests are used. Three real cases for failure data with failure truncation and time truncation of multiple numerically controlled machine tools are given to illustrate the use of the proposed models.
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Simonenko, S. I., and L. A. Sokolov. "Online Human Risk Assessment at the Industrial Plants." Occupational Safety in Industry, no. 3 (March 2021): 81–87. http://dx.doi.org/10.24000/0409-2961-2021-3-81-87.
Повний текст джерелаАнотація:
Risks of the employee unsafe behavior associated with their abilities and personal qualities are considered. The methodology is presented in the article concerning the risk assessment of unsafe behavior using online assessment by knowledge tests, ability tests and a professional personality questionnaire Deep Safety developed by Detech. The results of the employee online assessment are presented. The analysis of the criterion sample showed that the level of abilities and the level of expression of safety competencies affects both the number of cases of unsafe behavior and the overall results of work. A positive correlation was also found between the level of verbal intelligence and the propensity for safe behavior. Four safety competencies have the greatest correlation with the actual severity of safe behavior — they are law-abiding (following the rules), adherence to principles (intolerance to violations), responsibility, non-conflict. The first three of them have a positive correlation, while employees who are examples of safe behavior demonstrate a higher level of conflict. This can be explained by the fact that when they encounter violations or unsafe behavior, they openly point out this, suppress violations not being afraid to go to confrontation in the interests of ensuring safety. Online assessment is a fast and cost effective way of assessment, and, moreover, easily integrates with the professional tests and other assessment tools. We recommend that such an assessment be carried out in labor collectives with an interval of 1.5–2 years, which makes it possible to track the dynamics of indicators. One more advantage of this assessment system is that it allows not only to identify those who are prone to unsafe behavior, but to form the best strategy for interaction with the employee, to recruit labor collectives, in which, for example, the low law-abidingness of some employees would be compensated for by the high integrity of the manager and team-mates.
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Foreman-Murray, Lindsay, and Lynn S. Fuchs. "Quality of Explanation as an Indicator of Fraction Magnitude Understanding." Journal of Learning Disabilities 52, no. 2 (May 29, 2018): 181–91. http://dx.doi.org/10.1177/0022219418775120.
Повний текст джерелаАнотація:
Students’ explanations of their mathematical thinking and conclusions have become a greater part of the assessment landscape in recent years. With a sample of 71 fourth-grade students at risk for mathematics learning disabilities, we investigated the relation between student accuracy in comparing the magnitude of fractions and the quality of students’ explanations of those comparisons, as well as the relation between those measures and scores on a criterion test: released fraction items from the National Assessment of Educational Progress. We also considered the extent to which reasoning and language contribute to the prediction. Results indicated a significant moderate correlation between accuracy and explanation quality. Commonality analyses indicated that explanation quality accounts for little variance in National Assessment of Educational Progress scores beyond what is accounted for by traditional measures of magnitude understanding. Implications for instruction and assessment are discussed.
Дисертації з теми "Quadratic risk quality assessment criterion"
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Кузнєцова, Наталія Володимирівна. "Методи і моделі аналізу, оцінювання та прогнозування ризиків у фінансових системах". Doctoral thesis, Київ, 2018. https://ela.kpi.ua/handle/123456789/26340.
Повний текст джерелаАнотація:
Роботу виконано в Інституті прикладного системного аналізу Національного
технічного університету України «Київський політехнічний інститут імені Ігоря Сікорського».У дисертаційній роботі розроблено системну методологію аналізу та оцінювання фінансових ризиків, яка ґрунтується на принципах системного аналізу та менеджменту ризиків, а також запропонованих принципах адаптивного та динамічного менеджменту ризиків. Методологія включає: комбінований метод обробки неповних та втрачених даних, ймовірнісно-статистичний метод оцінювання ризику фінансових втрат, динамічний метод оцінювання ризиків, який передбачає побудову різних типів моделей виживання, метод структурно-параметричної адаптації, застосування скорингової карти до аналізу ризиків фінансових систем і нейро-нечіткий метод доповнення вибірки відхиленими заявками. Містить критерії урахування інформаційного ризику, оцінки якості даних, прогнозів та рішень, квадратичний критерій якості опрацювання ризику та інтегральну характеристику оцінювання ефективності методів менеджменту ризиків. Практична цінність одержаних результатів полягає у створенні розширеної інформаційної технології та інформаційної системи підтримки прийняття рішень на основі запропонованої системної методології.
Частини книг з теми "Quadratic risk quality assessment criterion"
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Sharma, Pankaj. "Applications of Statistical Tools for Optimization and Development of Smart Drug Delivery System." In Smart Drug Delivery [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99632.
Повний текст джерелаАнотація:
In the novel dosage form development, quality is the key criterion in pharmaceutical industry. The quality by design tools used for development of the quality products with tight specification and rigid process. The specifications of statistical tools are essentially based upon critical process parameters (CPPs), critical material attributes (CMAs), and critical quality attributes (CQAs) for the development of quality products. The application of quality by design in pharmaceutical dosage form development is systematic, requiring multivariate experiments employing process analytical technology (PAT) and other experiments to recognize critical quality attributes depend upon risk assessments (RAs). The quality by design is a modern technique to stabilize the quality of pharmaceutical dosage form. The elements of quality by design such as process analytical techniques, risk assessment, and design of experiment support for assurance of the strategy control for every dosage form with a choice of regular monitoring and enhancement for a quality dosage form. This chapter represents the concepts and applications of the most common screening of designs/experiments, comparative experiments, response surface methodology, and regression analysis. The data collected from the dosage form designing during laboratory experiments, provide the substructure for pivotal or pilot scale development. Statistical tools help not only in understanding and identifying CMAs and CPPs in product designing, but also in comprehension of the role and relationship between these in attaining a target quality. Although, the implementation of statistical approaches in the development of dosage form is strongly recommended.
Тези доповідей конференцій з теми "Quadratic risk quality assessment criterion"
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Górny, Adam. "Occupational Risk In Improving The Quality Of Working Conditions." In Applied Human Factors and Ergonomics Conference. AHFE International, 2020. http://dx.doi.org/10.54941/ahfe100327.
Повний текст джерелаАнотація:
Adherence to the systemic approach to improving working conditions is increasingly becoming a central prerequisite for the successful operation of business organizations. By adopting systemic principles to improve the quality of working conditions, organizations gain access to effective tools for eliminating hazards and strenuousness and consequently acquire the ability to grow and improve themselves. Any measures adopted within that framework are undertaken in recognition of the roles and tasks of employees seen as the internal clients of specific processes.The article demonstrates that improvements can be achieved by assessing risks. In this context, risk assessment is viewed as a tool for gathering information on irregularities. By assessing risks, businesses can identify any hazardous, deleterious and strenuous factors which require improvement (through corrective and preventive measures) and whose scope and characteristics depend on the level of occupational risk. The use of occupational risk as a criterion for selecting improvement measures helps identify adequate technical means and organizational arrangements to be applied to bring the working environment to the required quality standard. In particular cases, such means and arrangements should be complemented by using personal protection items. An essential consideration in improving working conditions is to incorporate any selected elements of the systemic approach that are critical for shaping the working environment. Only then will the proper improvement measures be effective.
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Vinnichenko, A. V. "DYNAMIC MODEL OF COMBINED AGGREGATION OF ADDITIVE MANUFACTURING PROCESS." In MODELING AND SITUATIONAL MANAGEMENT THE QUALITY OF COMPLEX SYSTEMS. Saint Petersburg State University of Aerospace Instrumentation, 2021. http://dx.doi.org/10.31799/978-5-8088-1558-2-2021-2-112-116.
Повний текст джерелаАнотація:
The paper presents methods and approaches for mathematical modeling and rationalization of flexible additive manufacturing, as well as other processes by which it is possible to create additive models for their integration into the system of experimental or pilot production. The work has also formed and synthesized a process model, which includes flexible production indicators, service indicators, and a developed criterion base for their assessment. The work takes into account the optimization criteria, as well as maximizing and minimizing risks for additive manufacturing, taking into account the possible risk component when deploying new processes for experimental and small-scale production. The models and methods described in the article will make it possible to carry out mathematical modeling and subsequent improvements for the flexible production process using additive technologies, used as a means of achieving the rational use of existing production resources within the framework of existing scientific and production complexes.
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Sanwarwalla, Mansoor H. "Regulatory and Industry Guidance on Use of Risk Technology in Nuclear Power Plant Applications." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26271.
Повний текст джерелаАнотація:
Since the United States Nuclear Regulatory Commission (USNRC) published its landmark “Reactor Safety Study — An Assessment of Accident Risks in U. S. Commercial Nuclear Power Plants” in late 1975, commercial nuclear power industry, encouraged by the USNRC, have since then been applying Probabilistic Risk Assessment (PRAs) in their nuclear power units in areas of in-service testing, in-service inspection, quality assurance, technical specifications, maintenance, etc. To guide and regulate the industry in use of PRAs, Regulatory Guides and Standards have been written and are being revised continuously by the USNRC, American Society of Mechanical Engineers (ASME) and American Nuclear Society (ANS). The current use of PRA takes credit for single failure criterion based on applicability of codes and standards. The proposed new USNRC regulation 10 CFR Part 53 applicable for all reactor technologies is silent on the applicability of current standards endorsed by the regulatory body. The impact of the proposed new rule to both new and the current application needs to be studied. This paper will review the application of the various guidance documents for their use in commercial nuclear power plants with emphasis on the new generation nuclear power plants.
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Özel, Çağlar, and Dila Okyar. "The Liability of Seller for the Conformity of the Goods in Contracts of Sale According to United Nations Convention on Contracts for the International." In International Conference on Eurasian Economies. Eurasian Economists Association, 2015. http://dx.doi.org/10.36880/c06.01217.
Повний текст джерелаАнотація:
In practice, breach of contract cases mostly involve controversies over the failure of the seller to deliver conforming goods in accordance with the contract. Article 35 CISG defines the obligation of the seller to deliver conforming goods in a very broad and uniformed manner as it states that, the seller must deliver goods which are of the quantity, quality and description required by the contract and which are contained or packaged in the manner required by the contract. CISG provides two criteria for the assessment of the non-conformity of goods. One of them is called “subjective” criterion of non-conformity. It goes without saying that the goods delivered shall be in conformity with all specifications agreed upon by the parties whether explicitly or implicitly. The other one is called “objective” criterion. If the agreement of the parties does not involve any specifications at all– like in the case of routine and quick orders of purchase, or if the agreement of the parties is insufficient in this respect, conformity of the goods will be decided according to the objective criterion. In accordance with Article 35 CISG, Article 36 CISG establishes the responsibility of the seller for any lack of conformity which exists at the time when the risk passes to the buyer, even though the lack of conformity becomes apparent only after that time. Regarding this, Article 67 CISG defines the moment at which the risk passes to the buyer and thus, divides the responsibility between the seller and the buyer.