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Advanced Search Results For "SAMPLING errors"

1 - 10 of 8,383 results for
 "SAMPLING errors"
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Los estudiantes de secundaria y la alfabetización mediática en la era de la desinformación.

Publication Type:Academic Journal

Source(s):Comunicar. oct2022, Vol. 30 Issue 73, p95-106. 12p.

Abstract:Este estudio presenta una radiografía actualizada de cómo los estudiantes de Educación Secundaria Obligatoria (ESO) de centros públicos españoles, de entre 11 y 16 años, se aproximan a los medios de comunicación, cómo se informan, el grado de discrimin...

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Artistic Design Method of User Interaction Experience of Mobile System Based on Context Awareness.

Publication Type:Academic Journal

Source(s):Security & Communication Networks. 6/7/2022, p1-10. 10p.

Abstract:This work combines context awareness to explore the art design technique of user interaction experience of mobile system and alters the conventional art communication and art appreciation methods in order to increase the impact of artistic interactive ...

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Memory-Augmented Insider Threat Detection with Temporal-Spatial Fusion.

Publication Type:Academic Journal

Source(s):Security & Communication Networks. 4/26/2022, p1-19. 19p.

Abstract:Insider threat detection is important for the smooth operation and security protection of an organizational system. Most existing detection models establish historical baseline by reconstructing single-day and individual user behaviors, and then treat ...

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Computing the effect of measurement errors on the use of auxiliary information under systematic sampling.

Publication Type:Academic Journal

Source(s):Communications in Statistics: Theory & Methods. 2022, Vol. 51 Issue 20, p6919-6934. 16p.

Abstract:The ratio, product, difference estimators, and unbiased estimator under systematic sampling scheme has been studied in the presence of measurement error. The methods of estimation have been proposed for the estimation of the finite population mean. To ...

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采用立方体取样法提高小麦根系 研究精准性的探讨.

Publication Type:Academic Journal

Source(s):Journal of Henan Agricultural Sciences. 2021, Vol. 50 Issue 11, p36-46. 11p.

Abstract:为减少取样误差,提高小麦根系研究的精准性,于2018—2020年分别采用立方体取样法(CSM)、 根钻法(CK1)、挖掘法(CK2)对西农979、周麦27进行不同生育时期不同土层根系生长发育和活性的比 较研究。结果表明,相较于CK1和CK2处理,CSM处理的根干质量、根长、根表面积和根体积测定值较 高,20~40 cm土层中不同处理上述指标测定值的差异大于0~20 cm土层,且在生育后期不同取样方法 上述指标测定值之间差异较大。相较于CK1和CK2处理,CSM处理的根系活性测定值较高,通过不同 取样...

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Portfolio optimization with sparse multivariate modeling.

Publication Type:Academic Journal

Source(s):Journal of Asset Management. Oct2022, Vol. 23 Issue 6, p445-465. 21p.

Abstract:Portfolio optimization approaches inevitably rely on multivariate modeling of markets and the economy. In this paper, we address three sources of error related to the modeling of these complex systems: 1. oversimplifying hypothesis; 2. uncertainties re...

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Estimation of population variance in successive sampling in presence and absence of measurement error.

Publication Type:Academic Journal

Source(s):Communications in Statistics: Theory & Methods. 2022, Vol. 51 Issue 14, p4653-4666. 14p.

Abstract:The present investigation deals with the estimation of population variance in successive sampling in presence and absence of measurement error. We have suggested a chain type estimator of population variance and compared its performances with natural s...

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Test for Non-Synchronized Errors of State Estimation Using Real Data.

Publication Type:Academic Journal

Source(s):IEEE Transactions on Power Systems. Jul2022, Vol. 37 Issue 4, p3161-3164. 4p.

Abstract:This letter discusses performance degradation of traditional supervisory control and data acquisition (SCADA)-based static state estimation (SSE) caused by violation of the static assumption. The sensitivity of non-synchronized sampling errors against ...

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Finding what you don't know: Testing SDM methods for poorly known species.

Publication Type:Academic Journal

Source(s):Diversity & Distributions. Sep2022, Vol. 28 Issue 9, p1769-1780. 12p.

Abstract:Aim: A limitation of species distribution models (SDMs) is that species with low sample sizes are difficult to model. Yet, it is often important to know the habitat associations of poorly known species to guide conservation efforts. Techniques have bee...

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On optimal classes of estimators in the presence of some nonsampling errors.

Publication Type:Academic Journal

Source(s):Journal of the National Science Foundation of Sri Lanka. 2021, Vol. 49 Issue 2, p281-294. 14p.

Abstract:During a survey study, an investigator may be incapable of assembling the complete response (i.e., there is non-response) and/or the assembled response is not 100 % true (i.e., measurement errors exist). In this situation, estimation of the population ...

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