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25541
Data-Driven Social Security Event Prediction: Principles, Methods, and Trends
Published 2025-01-01“…The advent of data-driven approaches has revolutionized the prediction of these events, offering new theoretical insights and practical applications. Aiming at offering a systematic review of current data-driven prediction methods used in social security, this paper delves into the progress of this research from three novel perspectives, prediction factors, technical methods, and interpretability, and then analyzes future development trends. …”
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25542
Relationship between External Environment, Internal Conditions, and Digital Transformation from the Perspective of Synergetics
Published 2022-01-01“…This study shows that the influencing factors of pharmaceutical enterprises’ DT include the external environment (customer needs, market competition, government policy, and digital technology) and internal conditions (digital strategy, leadership, and organization capability). The theoretical innovation of this study is to explore the synergistic effect of external environment and internal conditions on DT and put forward that the internal conditions play mediating role in the external environment and DT. …”
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25543
SIMULATION ANALYSIS AND OPTIMIZATION DESIGN OF THE FLEXIBLE DYNAMICS OF A NEW TYPE OF WHEELCHAIR CLIMBING MECHANISM
Published 2017-01-01“…Got movement characteristic curve of direct component mechanical foot 1 in the machine,and put forward the improvement scheme towards its unstable phenomenon; At the same time doing kinetics analysis,got the equivalent displacement of constructions of stair wheelchair and the change of time curve of equivalent stress of members of the gym agencies,completed kinematic analysis and dynamic analysis of mechanical system of flexible body of gym mechanism; Finally optimized the design of the ladder mechanism,the optimization result was reduced20. 74% than the quality of the original model,and reduced the manufacturing of raw materials,meanwhile provided theoretical basis for optimization design of this kind of wheelchair.…”
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25544
Magneto-optical absorption properties of a Weyl semimetal thin film
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25545
Computing Correlation among the Graphs under Lexicographic Product via Zagreb Indices
Published 2021-01-01“…A topological index (TI) is a numerical descriptor of a molecule structure or graph that predicts its different physical, biological, and chemical properties in a theoretical way avoiding the difficult and costly procedures of chemical labs. …”
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25546
Beyond perfection: Reclaiming death in and for education
Published 2021-09-01“…Through a reading of Gert Biesta’s theoretical considerations, I discuss how educational systems scientifically explained and measured are created to be fixed (or healed), in pursuit of a type of education as a social apparatus to enable or reach for a perfect future. …”
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25547
Study on the Effect of Spur Dike Arrangement in Tidal Estuary on River Bed Scouring
Published 2020-01-01“…This paper analyzes the influence of different spur dike spacing onriver bed scouring by two-dimensional water-sediment model and theoretical model. The results showthat with the gradual increase of the spur dike spacing, the scouring depth of the dam headincreases slowly, and the scouring distribution in the main channel becomes uneven. …”
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25548
La place de l’imagination dans le dispositif didactique universitaire : une double fonction identitaire à créer
Published 2019-07-01“…In an exploratory perspective, the work of future teachers integrated into a digital portfolio (N = 39) carried out in a Quebec university is analyzed. The theoretical foundations include the subject as socioculturally situated and for which the context of regulated activities and normative practices constitutes a didactic action (Brousseau, 1998) sedimented by the society (Giddens 1984/1987, Archer 1998), updated by the practices and institutionalized as a reference in time. …”
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25549
Continuous Dual Resetting of the Immune Repertoire as a Basic Principle of the Immune System Function
Published 2017-01-01“…The CDR concept’s relative simplicity and concomitantly documented congruency with empirical, clinical, and experimental data suggest it may represent a plausible theoretical framework to better understand the human immune system function.…”
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25550
Control of Water Inrush from Longwall Floor Aquifers Using a Division Paste Backfilling Method
Published 2021-01-01“…Aiming at the problem of the safety mining problems of longwall paste filling working face under buildings on high confined water in the Daizhuang Coal Mine, the paste filling mining method was used. A series of theoretical analyses, numerical simulations, and field measurements were applied. …”
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25551
Sensibilisation à l’environnement d’un collège alsacien et d’une école malgache
Published 2015-12-01“…Three annual visits to the zoo allow to children (1) to enhance their understanding of the fauna and flora, this aspect being completed by a personal bibliography produced by children; (2) to introduce notions on the phenotypic classification of primates by observing animals and the help of simple arrays of determining criteria ; (3) to improve their ecological awareness with tangible and common examples like the deforestation in Madagascar or the invasive species introduction, pupils are invited to think about these subjects and to suggest theoretical solutions ; (4) to observe the interspecific behavioral differences and the sexual hierarchy of lemurs using simple ethological observations ("all occurrences sampling" methods) of several species.…”
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25552
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25553
A Summary of the Research on the Effect of Gear Tooth Root Strengthening on Bending Fatigue Strength based on Residual Stress
Published 2019-12-01“…The influence of root grinding on the bending fatigue performance of gears is discussed. It provides theoretical basis and technical reference for optimizing gear design and manufacturing and improving gear bending fatigue performance in engineering practice.…”
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25554
An empirical study on the semantics-pragmatics of two Romance confirmational tags
Published 2024-12-01“…These predictions are tested in three experimental studies, which provide empirical support for the theoretical proposal regarding the different pragmatic contribution of both tags. …”
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25555
Altamira-PA: novos papéis de centralidade e reestruturação urbana a partir da instalação da UHE Belo Monte
Published 2016-10-01“…As a parameter for this analysis, we considered that Altamira is having a major role in the South East centrality of the Pará state, reaching up to nine urban centres between the Xingu River and the Transamazonica road (BR 230). The theoretical references used in this article are coupled with surveys about the city, urbanism in Brazil and in the Amazon area, with an emphasis on surveys linking urban restructuration and average sized cities. …”
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25556
DESIGN FOR WET BRAKE OF AUTOMOBILE BASED ON THE REAL TIME TEMPERATURE CONTROL SYSTEM
Published 2016-01-01“…In order to solve the problems of much heat during braking process,and poor stability in high speed condition of the automobile wet brake,a new type of wet brake based on the layout of real time temperature control was proposed by analyzing the working principle of the layout scheme,a new type of wet brake model was established,finally,the feasibility of the new type wet brake was verified by the bench test method. The theoretical calculation and experimental verification show that both results are consistent basically,the brake torque fluctuation of the wet brake based on the real-time temperature control system are obviously suppressed,and the brake torque stability of the brake process is obviously improved,and the brake torque of each stage is large than the traditional wet brake; the coolant temperature of the wet brake based on the real time temperature control system can be controlled in the vicinity of 70℃,which has a positive effect on improving the performance of the automobile brake system.…”
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25557
DESIGN AND TEST OF A MULTI-DIMENSIONAL MICRO-VIBRATION SIMULATOR
Published 2018-01-01“…To simulate the micro-vibration of the space platform such as satellites,space stations and so on,a multidimensional micro-vibration simulator based on the Gough-Stewart configuration was designed.Firstly,the structural design of the multi-dimensional micro-vibration simulator was introduced.The theoretical model of the simulator is established by NewtonEuler’s method.In this model,the situation of misalignment between the origin of the relative reference frame and the barycenter of upper platform and load was considered.Combining with the principle of virtual work,the equations of the natural frequencies and mode shapes could be gained.Secondly,the modal of the simulator was analyzed by the finite element method and the analytical method.The first six natural frequencies and the modal shapes were obtained.The maximum error of FEA simulation is4.17% compared with the mathematical analytical solution.Finally,a prototype of the micro-vibration simulator was manufactured and its performance was testing.The test results indicate that the effective operating frequency of the simulator is up to 100 Hz,meeting the need of the vibration test.…”
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25558
Secure data sharing scheme supporting efficient synchronous evolution for ciphertext and key
Published 2018-05-01“…The static property of stored ciphertext in cloud increases the probability that an attacker can crack the ciphertext by obtaining a key,while ciphertext and key updates based on key distribution and re-encryption are excessively expensive.For this problem,a secure data sharing scheme supporting efficient synchronous evolution for ciphertext and key (CKSE-SDS) was proposed.By introducing cryptography accumulator in broadcast encryption,mimicry transformation factor could be constructed supporting time-hopping periodically and efficient synchronous evolution for ciphertext and key could be achieved based on dynamic segmentation and fusion of ciphertext and key,which reduced certainty in the process of encryption and key distribution and increased the difficulty for attackers exploiting security vulnerabilities to obtain key to crack ciphertext as well.Theoretical analysis and security proofs show that the proposed scheme can support secure and efficient data access as well as reduce the probability of a successful attack effectively for an attacker,which can also enhance the system’s active security defense capability.…”
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25559
(t,k)-diagnosability of exchanged crossed cube under the PMC model
Published 2019-06-01“…Exchanged crossed cube(ECQ) is one of the latest achievements in the research of topology of novel interconnection networks.ECQ is a more optimized form of organization for multi-processor parallel computers,which retains the advantages of exchanged hypercube and crossed cube in terms of the smaller diameter,fewer links,and lower cost factor,and which indicates more balanced consideration.However,so far,ECQ hadn’t been formally introduced into multi-processor parallel computers.One of the main reasons was that its reliability research wasn’t yet systematic.Among them,the operational reliability represented by diagnosability was the most urgent.ECQ was taken as studying object,after topological analyzing,some important topological properties of ECQ were introduced,which determines the (t,k)-diagnosability of ECQ(s,t) under the PMC model by theoretical deduction and simulation experiments.Simulation results show that ECQ reliability complement and improvement,which provides strong technical support for subsequent application and popularization.…”
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25560
Contenu et contenant de la revue Développement durable & territoires (DD&T) : 20 ans de publications au croisement de la durabilité et des territoires
Published 2022-12-01“…Secondly, discourse analysis reveals the lexical forms and structuring themes as well as the place given to the articulation of empirical and theoretical/conceptual approaches. Moreover, if the review remains focused on the links between sustainability issues and territorial issues, the reference to the notion of sustainable development is strongly blurred. …”
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