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Journal articles on the topic 'Variable-distance - time'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Iles, Kim, and David Hugh Harrison Carter. "“Distance-variable” estimators for sampling and change measurement." Canadian Journal of Forest Research 37, no. 9 (2007): 1669–74. http://dx.doi.org/10.1139/x07-029.

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The estimation procedure described is a simple technique that is applicable to virtually any plot-based sampling method and virtually any measured variable. It can be retrofitted to any existing fixed or variable plot over time by simply knowing the distance from the sampled object to the sample point. These estimators are illustrated for sampling over time as the plot size changes. An example is variable-plot sampling in forestry. Traditional estimates from sample plots can be geometrically viewed as a series of “disc shapes” where the same estimate is used for an object no matter how near th

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Samantaray, S. R., and P. K. Dash. "Transmission line distance relaying using a variable window short-time Fourier transform." Electric Power Systems Research 78, no. 4 (2008): 595–604. http://dx.doi.org/10.1016/j.epsr.2007.05.005.

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Zhang, Jinqin, Gang Liu, Jiayun Huang, and Yaohui Zhang. "A Study on the Time Lag and Compensation of a Variable-Rate Fertilizer Applicator." Applied Engineering in Agriculture 37, no. 1 (2021): 43–52. http://dx.doi.org/10.13031/aea.13855.

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HighlightsA lag time detection system for variable-rate fertilization was developed.The lag time of a variable-rate fertilizer applicator was obtained and analyzed.A sigmoid equation was fitted to the data of rate change transition tests.The planar coordinates-based lag distance compensation method (LDCM) could reduce the lag distance effectively.Abstract. The location accuracy of fertilizer application is an essential aspect of the performance of variable-rate fertilizer applicators. The lag time of the fertilization system is an important cause of fertilizer rate transition lags. In order to

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Hu, Ping, Chuan Huang, and Jing Lian. "Efficient dynamic programming in economical cruise control under real-time traffic situations." Transactions of the Institute of Measurement and Control 42, no. 11 (2020): 2044–56. http://dx.doi.org/10.1177/0142331220904552.

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In this paper, dynamic programming (DP) economical cruise control algorithms under discrete distance and discrete time strategies are designed to improve battery electric vehicle (BEV) energy consumption and riding comfort. In our experiment, energy consumption of constant-speed driving is reduced by up to 21.6% using the optimum velocity profiles from discrete distance DP. ‘Variable step length and boundary conditions’ are utilized to reduce discrete distance DP processing time by 90.8% with no effect on accuracy. Under discrete time DP, position is introduced as an additional variable, so di

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Arellano Ferro, A., I. H. Bustos Fierro, J. H. Calderón, and J. A. Ahumada. "NGC 1261: A TIME-SERIES VI STUDY OF ITS VARIABLE STARS." Revista Mexicana de Astronomía y Astrofísica 55, no. 2 (2019): 337–50. http://dx.doi.org/10.22201/ia.01851101p.2019.55.02.18.

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Time-series VI CCD photometry of the globular cluster NGC 1261 is employed to study its variable star population. A membership analysis of most variables based on Gaia DR2 proper motions and colours was performed prior to the estimation of the mean cluster distance and metallicity. The light curves of the member RR Lyrae were Fourier decomposed to calculate their individual values of distance, [Fe/H], radius and mass. The I band P-L for RR Lyrae stars was also employed. Our best estimates of the metallicity and distance of this Oo I cluster are [Fe/H]ZW =−1.42 ± 0.05 dex and d = 17.2 ± 0.4 kpc

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Ify, L. Nwaogazie, A. Akpan Henry, and Bovwe Oghenefejiri. "Evaluation of Methods for Determination of Dispersion Coefficient for Utu Etim-Ekpo River, Nigeria." Journal of Scientific Research & Reports 14, no. 2 (2017): 1–9. https://doi.org/10.9734/JSRR/2017/33645.

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This study was conducted to evaluate methods for the determination of the longitudinal dispersion coefficient of Utu Etim-Ekpo River. Rihodamine-B was used in the tracer dye study. The variable distance – variable time method of sample collection was adopted. The samples collected were immediately transferred to the laboratory for analysis. Three approaches were adopted for the computation of dispersion coefficient with respect to this study, namely: Leverspiel & Smith method; Agunwamba’s method; and Ojiako’s method, respectively. The first two methods are analytical while the third is num

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Pyke, GH, and HF Recher. "Estimated Forest Bird Densities by Variable Distance Point Counts." Wildlife Research 12, no. 2 (1985): 307. http://dx.doi.org/10.1071/wr9850307.

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During variable distance point counts a stationary observer records the species and distance for all birds detected during a fixed time interval. Such counts, repeated throughout the area of interest, can be used to estimate bird density so long as the following assumptions are made: (1) the distribution of birds is unaffected by the observer; (2) observers are certain of detecting near birds; (3) there is no error in measurement or estimation of distances; and (4) birds are stationary. Data collected during the present study indicated that at least two of these assumptions are not satisfied:

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Li, Hongchang, Fang Gao, Hehe Niu, and Fang Chang. "Application of Variable Distance Photoelectric Sensor in Precision Automatic Sowing and Fertilization." Journal of Nanoelectronics and Optoelectronics 15, no. 6 (2020): 707–13. http://dx.doi.org/10.1166/jno.2020.2790.

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In order to realize the real-time monitoring of precision automatic seeding and fertilization, a monitoring system of precision automatic seeding and fertilization integrated machine based on variable distance photoelectric sensor is designed. In this system, STM32F103R8T6 single chip microcomputer hardware system is used as the lower computer to judge the running state of the machine. Through Modbus protocol, the received information is transmitted to the upper computer interface of MCGSTPC touch screen for real-time display. In the laboratory test, the designed seed metering device and ferti

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Nguyen, Kien, and Nguyen Hung. "The reverse total weighted distance problem on networks with variable edge lengths." Filomat 35, no. 4 (2021): 1333–42. http://dx.doi.org/10.2298/fil2104333n.

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We address the problem of reducing the edge lengths of a network within a given budget so that the sum of weighted distances from each vertex to others is minimized. We call this problem the reverse total weighted distance problem on networks. We first show that the problem is NP-hard by reducing the set cover problem to it in polynomial time. Particularly, we develop a linear time algorithm to solve the problem on a tree. For the problem on cycles, we devise an iterative approach without mentioning the exact complexity. Additionally, if the cycle has uniform edge lengths, we can prove that th

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Ma, Yinglong, Xiaolan Zhang, and Ke Lu. "A graph distance based metric for data oriented workflow retrieval with variable time constraints." Expert Systems with Applications 41, no. 4 (2014): 1377–88. http://dx.doi.org/10.1016/j.eswa.2013.08.035.

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Vinuzia, Mala, Fitriah Permata Cita, and Didi Suwardi. "Economic Valuation of Senggigi Nature Tourism With The Travel Cost Approach In 2024." Jurnal Ekonomi dan Bisnis Indonesia 10, no. 1 (2025): 103–7. https://doi.org/10.37673/jebi.v10i1.6248.

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This study aims to determine how much economic value of Senggigi nature tourism is seen from travel costs and to determine whether travel costs, time costs, respondent perceptions, substitution characteristics, individual income, facilities, education level, distance, and age affect the number of individual visits by domestic and foreign tourists in Gili Trawangan nature tourism in North Lombok Regency. The research method used is the survey sample method, and the respondent determination technique is the accidental sampling method where the sample is carefully selected so that it is relevant

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Clementini, G., L. Baldacci, A. Bragaglia, et al. "Distance scale, variable stars and stellar populations in Local Group galaxies." International Astronomical Union Colloquium 193 (2004): 60–64. http://dx.doi.org/10.1017/s0252921100010344.

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AbstractWe present an overview of our study of the short period variable stars in the Large Magellanic Cloud, and in the dwarf galaxies Fornax, Leo I, and NGC 6822. Light curves are presented for RR Lyrae stars, Anomalous Cepheids and, for the first time, for Dwarf Cepheids in the field and in the globular cluster #3 of the Fornax galaxy.

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Smeets, Jeroen B. J., Eli Brenner, Sonia Trébuchet, and Daniel R. Mestre. "Is Judging Time-to-Contact Based on ‘Tau’?" Perception 25, no. 5 (1996): 583–90. http://dx.doi.org/10.1068/p250583.

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An investigation was undertaken into whether judgments of time-to-contact between a laterally moving object and a bar are based on the direct perception of an optical variable (tau), or on the ratio between the perceived distance and perceived velocity of the object. A moving background was used to induce changes in the perceived velocities without changing the optical variables that specify time-to-contact. Background motion induced large systematic errors in the estimated time-to-contact. It is concluded that the judgment of time-to-contact is primarily based on the ratio between the perceiv

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Smokvina Hanza, Sunčana, Tea Marohnić, Dario Iljkić, and Robert Basan. "Artificial Neural Networks-Based Prediction of Hardness of Low-Alloy Steels Using Specific Jominy Distance." Metals 11, no. 5 (2021): 714. http://dx.doi.org/10.3390/met11050714.

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Successful prediction of the relevant mechanical properties of steels is of great importance to materials engineering. The aim of this research is to investigate the possibility of reducing the complexity of artificial neural networks-based prediction of total hardness of hypoeutectoid, low-alloy steels based on chemical composition, by introducing the specific Jominy distance as a new input variable. For prediction of total hardness after continuous cooling of steel (output variable), ANNs were developed for different combinations of inputs. Input variables for the first configuration of ANNs

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Saranya, M., and S. Arulselvarani. "Real-Time Obstacle Detection using Yolov8 for Assistive Navigation." Indian Journal Of Science And Technology 18, no. 25 (2025): 2009–22. https://doi.org/10.17485/ijst/v18i25.937.

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Objectives: The study is designed to find obstacles immediately in a person’s field of view using stereo vision, deep learning, and computer vision methods. When the system calculates the distance and angle of every obstacle, the user can drive it safely through the environment. Distance and angle to nearby objects are mainly controlled because it improves awareness and security on the road. Methods: The system detects objects using YOLOv8 and tracks them with Deep SORT using a video from the camera. Taking observations from a series of known points, distance and position angles can be determi

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Chen, Hao, Yang Tang, Jinyuan Li, Faxin Zhu, and Xianbin Teng. "The influence of impinging distance variable on the effect of submerged jet scour." Journal of Physics: Conference Series 2660, no. 1 (2023): 012004. http://dx.doi.org/10.1088/1742-6596/2660/1/012004.

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Abstract In this paper, the effect of jet holes under different impinging distances was studied by using Flow-3D fluid software. The results show that when the impinging distance of the jet is small, the profile is random. There is a critical impinging distance. At this time, the width and depth of the hole enter a relatively static state, which can be regarded as the key point of the transition stage. After exceeding the critical impinging distance, the depth and width of the hole quickly reach the maximum value; as the impinging distance continues to increase, the hole parameters gradually d

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Neves, Ana Maria, and Lina Morgado. "Monochronic Vs. Polychronic: A Profile of Academic Time Use Among Online Distance Education Students." EDEN Conference Proceedings, no. 1 (October 21, 2020): 444–53. http://dx.doi.org/10.38069/edenconf-2020-rw-0049.

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The results presented are part of a doctoral thesis which is being finalized. The research is centred on the online distance learning student experience in higher education, considering the variable time management, its relationship with technologies, and the virtualization of teaching and learning. Exploratory in nature, the research takes the form of a case study using a mixed methodology. One of the main objectives of the study is to contribute to the construction of a theoretical framework on the distance learning student time variable. We present a profile of academic time use by e-studen

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SINGH, C. P. "EARLY HOMOGENEOUS UNIVERSE WITH VARIABLE COSMOLOGICAL CONSTANT: KINEMATICS TESTS." International Journal of Modern Physics A 22, no. 13 (2007): 2415–31. http://dx.doi.org/10.1142/s0217751x07036609.

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A spatially homogeneous cosmological model with flat geometry filled with perfect fluid is studied in the presence of a variable cosmological "constant." Einstein's field equations are solved by using the "gamma-law" equation of state p = (γ-1)ρ, where the adiabatic parameter γ, varies with cosmic time. The functional form of γ, which is assumed to be the function of scale factor R as proposed by Carvalho, is used to describe the early evolution of universe with variable cosmological "constant." A unified description of early universe is given in which an inflationary phase is followed by radi

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Minghai Yuan, Minghai Yuan, Chenxi Zhang Minghai Yuan, Kaiwen Zhou Chenxi Zhang, and Fengque Pei Kaiwen Zhou. "Real-time Allocation of Shared Parking Spaces Based on Deep Reinforcement Learning." 網際網路技術學刊 24, no. 1 (2023): 035–43. http://dx.doi.org/10.53106/160792642023012401004.

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<p>Aiming at the parking space heterogeneity problem in shared parking space management, a multi-objective optimization model for parking space allocation is constructed with the optimization objectives of reducing the average walking distance of users and improving the utilization rate of parking spaces, a real-time allocation method for shared parking spaces based on deep reinforcement learning is proposed, which includes a state space for heterogeneous regions, an action space based on policy selection and a reward function with variable coefficients. To accurately evaluate the model

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Hou, Dengkai, Houming Fan, Xiaoxue Ren, Panjun Tian, and Yingchun Lv. "Time-Dependent Multi-Depot Heterogeneous Vehicle Routing Problem Considering Temporal–Spatial Distance." Sustainability 13, no. 9 (2021): 4674. http://dx.doi.org/10.3390/su13094674.

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Aiming at the multi-depot heterogeneous vehicle routing problem under the time-dependent road network and soft time window, considering vehicle fixed cost, time window penalty cost and vehicle transportation cost, an optimization model of time-dependent multi-depot heterogeneous vehicle routing problem is established with the objective of minimizing distribution cost. According to the characteristics of the problem, a hybrid genetic algorithm with variable neighborhood search considering the temporal–spatial distance is designed. Customers are clustered according to the temporal–spatial distan

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Hawari, Abdullah. "Reaction Time Difference Electric Actuator and Pneumatic Actuator Using Simulation X program." ACMIT Proceedings 3, no. 1 (2019): 227–30. http://dx.doi.org/10.33555/acmit.v3i1.49.

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Electric actuator and pneumatic actuator have some difference in the system, but need to find which one that have better efficiency and applicable on the designed system. Comparing two different system is not an easy task, need to find the right variable to be compared to define which one is more applicable. Reaction time is one of the variable determined by the velocity and the distance reached by the actuator to find which one is applicable. Using simulation X 3.3 to take the simulation on the pneumatics and the electronics using another parameter to find the reaction time of each system.

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TURETSKY, VLADIMIR, and VALERY Y. GLIZER. "ROBUST SOLUTION OF A TIME-VARIABLE INTERCEPTION PROBLEM: A CHEAP CONTROL APPROACH." International Game Theory Review 09, no. 04 (2007): 637–55. http://dx.doi.org/10.1142/s0219198907001631.

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A planar interception problem of a maneuverable target is considered using the linearized kinematic model with variable velocities and first-order dynamics of the interceptor and target. The maneuverabilities of the interceptor and target are assumed to be variable. By using an auxiliary zero-sum linear-quadratic differential game with cheap controls of both players, an interception guidance law, linear with respect to the state vector, is derived. An analytical description of the set of initial positions (capture set) is obtained, from which this guidance law provides zero miss distance, subj

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Li, Maosheng, Jing Fan, and Jaeyoung Lee. "Modeling Car-Following Behavior with Different Acceptable Safety Levels." Sustainability 15, no. 7 (2023): 6282. http://dx.doi.org/10.3390/su15076282.

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In normal car-following (CF) states, the minimum safe braking distance (MSBD) is virtually an unmeasurable variable, mainly due to the diversity of drivers’ reaction times and vehicles’ braking performance. The average MSBD regarding the reaction time and decelerations as constant values is sometimes greater than the distance used for safe braking of the following vehicle when the leading vehicle applies an emergency brake, which is named the short-distance CF behavior. The short-distance CF conveys that drivers adopt strategies of lower acceptable safety levels, which can be applied to intell

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Luo, Yahui, Defan Huang, Ping Jiang, et al. "Design and Experimental Testing of an Overhead Rail Automatic Variable-Distance Targeted Spray System for Solar Greenhouses." Agriculture 13, no. 9 (2023): 1853. http://dx.doi.org/10.3390/agriculture13091853.

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Crop cultivation in solar greenhouses is affected by issues such as low levels of automation in spraying machinery, inefficient spraying, and a lack of suitable spraying equipment for vertically cultivated crops, all of which are in urgent need of resolution. To address these problems, this paper proposes a suspended-rail automatic variable-distance targeted spray system. The rated working speed of the spray system is 0.3 m/s, and the rated working pressure is 0.3 MPa. This system achieves precise spraying of crops at varying heights by dynamically adjusting the position of the spray nozzle. T

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Budiati, Anik. "Model of The Distance Between The Readability of Word Messages on Conventional Signs and Electronic Signs." Ranah Research : Journal of Multidisciplinary Research and Development 6, no. 5 (2024): 2101–5. http://dx.doi.org/10.38035/rrj.v6i5.1083.

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Traffic signs are divided into conventional signs and electronic signs. The message conveyed is in the form of a pigtogram and/or electronic message. (Budiati, 2014) compared the legibility distance of letter dimensions on conventional signs, it was found that H=1.032+0.273D with H being the height of the letter and D being the reading distance. (Budiati, 2023), examined the relationship between the driver's reading speed and the number of words and lines in the Variable Message Sigh. This research produces a reading speed of 1.37 words/second. The research was continued to obtain a modeling o

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Glasauer, Stefan, Erich Schneider, Renato Grasso, and Yuri P. Ivanenko. "Space–Time Relativity in Self-Motion Reproduction." Journal of Neurophysiology 97, no. 1 (2007): 451–61. http://dx.doi.org/10.1152/jn.01243.2005.

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Experiments on reproducing imposed self-motion showed that not only final distance or angle of motion, but also the temporal profile are reproduced. Reproduction errors have been attributed to sensory inputs, inaccurate memorization of the motion variable, or motor errors. However, another possible source of error has so far been neglected. The internal time base for path integration or movement memorization may be distorted and thus not reflect physical time. Because additional cognitive load was previously shown to affect subjective estimation of duration, we used a dual-task paradigm during

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Ramezani Khansari, Ehsan, Masoud Tabibi, and Fereidoon Moghadas Nejad. "A Study on Following Behavior Based on the Time Headway." Jurnal Kejuruteraan 32, no. 2 (2020): 187–95. http://dx.doi.org/10.17576/jkukm-2020-32(2)-02.

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While time headway (TH) is a relatively simple variable and has been well researched, it has been less explored in non-lane-based traffic. The main aim of this paper is considering lateral distance in studying TH in a non-lane-based traffic flow. In this study driving behavior, speed-TH relationship, and the following threshold by using only TH in a non-lane-based flow were investigated. In a novel approach, THs were segmented into five intervals in a step by step manner from smallest to largest THs. Considering lateral distance led to divide driving behavior into intervals (based on the avera

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Yepez, M. A., A. Arellano Ferro, and D. Deras. "CCD VI time-series of the extremely metal-poor globular cluster M92: revisiting its variable star population." Monthly Notices of the Royal Astronomical Society 494, no. 3 (2020): 3212–26. http://dx.doi.org/10.1093/mnras/staa637.

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ABSTRACT We present an analysis of VI CCD time-series photometry of the Oo II type globular cluster M92. The variable star population of the cluster is studied with the aim of revising their classifications, identifications, frequency spectra, and to select indicators of the parental cluster metallicity and distance. The Fourier decomposition of RR Lyrae light curves lead to the estimation of mean [Fe/H]spec = −2.20 ± 0.18 and distance of 8.3 ± 0.2 kpc. Four new variables are reported: one RRd (V40), a multimode SX Phe (V41), an SR (V42), and one RRc (F1) that is most likely not a cluster memb

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Li, Ruizhe, Jingyu Cui, and Daobo Fu. "A time series data regression based on a B-spline and stacking framework." Journal of Physics: Conference Series 2813, no. 1 (2024): 012024. http://dx.doi.org/10.1088/1742-6596/2813/1/012024.

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Abstract This paper proposes a new time series regression method based on the combination of B-spline basis expansion and distance covariance weighted model. This paper considers the case that the predictor variable is a time series and the response variable is a continuous scalar. In order to solve these problems of high dimension and high noise of time series, this proposed method uses a B-spline basis to reduce the dimension and extract the function information of the original sequence. Considering that there is still some noise in the reduced dimension random variables, this proposed metho

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Erromdhani, Ridha, Bassem Jarboui, Mansour Eddaly, Abdelwaheb Rebai, and Nenad Mladenovic. "Variable neighborhood formulation search approach for the multi-item capacitated lot-sizing problem with time windows and setup times." Yugoslav Journal of Operations Research 27, no. 3 (2017): 301–22. http://dx.doi.org/10.2298/yjor160417017e.

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In this paper we suggest a new variant of Variable neighborhood search designed for solving Mixed integer programming problems. We call it Variable neighborhood formulation search (VNFS), since both neighborhoods and formulations are changed during the search. VNS deals with integer variables, while an available (commercial) solver is responsible for continues variables and the objective function value. We address the multi-item capacitated lotsizing problem with production time windows and setup times, under the non-customer specific case. This problem is known to be NP-hard and can be formul

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Nurfitriani, Nadhira, and Fahmi Fahmi. "Analysis of The Most Affecting Factors in The Selection of Conventional and Precast Concrete Floor Slabs on Time Performance." ADRI International Journal of Sciences, Engineering and Technology 6, no. 01 (2022): 20–27. http://dx.doi.org/10.29138/ijset.v6i01.62.

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One of the efforts to achieve the goals of construction project in terms of cost, quality and time is to replace conventional methods with more modern ones, namely by applying precast concrete. Precast concrete products, especially for buildings, are quite varied, one of them is Hollow Core Slab (HCS). Supported by previous research which explains that precast concrete floor slabs can save processing time compared to conventional floor slabs. Therefore, it is necessary to identify factors and variables that affecting the selection of conventional and precast floor plates on time performa

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Mateo, Julio C., Robert H. Gilkey, and Jeffrey L. Cowgill. "Effect of Variable Visual-Feedback Delay on Movement Time." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 51, no. 19 (2007): 1373–77. http://dx.doi.org/10.1177/154193120705101921.

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The effects of variable feedback delays on movement time were examined in a three-dimensional (3D) virtual environment. The participants' task was to use a 3D controller to position a cursor in targets as they appeared in a cubic workspace. Both the mean and standard deviation of the delay between the movement of the controller and the displayed position of the cursor were manipulated. In addition, the size of the targets and the distance between targets were varied. The results suggested that movement times are much more strongly affected by mean delay than by delay variability and that the e

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Shang, Wei, Jie Guo, Shengjing Tang, Yueyue Ma, and Yao Zhang. "Impact Time Guidance Law Considering Autopilot Dynamics Based on Variable Coefficients Strategy for Maneuvering Target." Mathematical Problems in Engineering 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/815149.

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This paper investigates the terminal guidance problem for the missile intercepting a maneuvering target with impact time constraint. An impact time guidance law based on finite time convergence control theory is developed regarding the target motion as an unknown disturbance. To further improve the performance of the guidance law, an autopilot dynamics which is considered as a first-order lag is taken into consideration. In the proposed method, the coefficients change with the relative distance between missile and target. This variable coefficient strategy ensures that the missile impacts the

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Caudill, Steven B., Neela Manage, and Franklin G. Mixon. "Using Co-Ordinate Systems in Hedonic Housing Regressions." Real Estate 1, no. 1 (2024): 41–64. http://dx.doi.org/10.3390/realestate1010004.

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Hedonic house price studies typically incorporate information about location by including either a set of dummy variables to represent individual locations called “neighborhoods” or by using a set of distance (or travel time) variables to characterize locations in terms of proximity to amenities and dis-amenities. As an alternative to these, relatively recent research advocates a latitude–longitude co-ordinate system for incorporating distance information into hedonic house price regressions. This study shows that many of the claims made in this research, particularly those referencing the eli

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Pan, Deng, Qing Luo, Liting Zhao, Chuansheng Zhang, and Zejun Chen. "A New Calibration Method for the Real-Time Calculation of Dynamic Safety Following Distance under Railway Moving Block System." Mathematical Problems in Engineering 2018 (August 12, 2018): 1–11. http://dx.doi.org/10.1155/2018/3061034.

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Only the actual following distance that is a little greater than the optimum safety following distance at any time can make the following train move in safety and efficiency. For this purpose, a new calibration method is studied for the real-time calculation of the dynamically optimum safety following distance. To cope with the complex situations of train following operation, the mathematic model of train deceleration operation based on the hyperbolic function with a variable acceleration control strategy is established to simulate the speed-changing behavior of high-speed train steered by the

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Hong, Zhong, Kunhong Li, Mingjun Su, and Guangmin Hu. "Improved spectral clustering approach — A new tool for unsupervised seismic facies analysis of variable window length." Interpretation 9, no. 2 (2021): T407—T420. http://dx.doi.org/10.1190/int-2020-0059.1.

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The traditional constant time window-based waveform classification method is a robust tool for seismic facies analysis. However, when the interval thickness is seismically variable, the fixed time window is not able to contain the complete geologic information of interest. Therefore, the constant time window-based waveform classification method is inapplicable to conduct seismic facies analysis. To expand the application scope of seismic waveform classification in the strata with varying thickness, we have proposed a novel scheme for unsupervised seismic facies analysis of variable window leng

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Graydon, Jan, and Martin Griffin. "Specificity and Variability of Practice with Young Children." Perceptual and Motor Skills 83, no. 1 (1996): 83–88. http://dx.doi.org/10.2466/pms.1996.83.1.83.

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It has previously been suggested that paradigms investigating schema theory should include tests of the effects of variability of practice on tasks experienced during the acquisition of learning. The present aim was to test this effect using a sports-related task. Two groups of children ( n = 13 each) aged between 3 and 5 yr. old were pretested on an aiming task. They then received ten practice trials per day for ten days. One group (designated the specific group) practised only at the specified target distance, while another group (designated the specific plus variable group) practised at the

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Patel G C, Manjunath, Prasad Krishna, Mahesh B. Parappagoudar, and Pandu Ranga Vundavilli. "Multi-Objective Optimization of Squeeze Casting Process using Evolutionary Algorithms." International Journal of Swarm Intelligence Research 7, no. 1 (2016): 55–74. http://dx.doi.org/10.4018/ijsir.2016010103.

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The present work focuses on determining optimum squeeze casting process parameters using evolutionary algorithms. Evolutionary algorithms, such as genetic algorithm, particle swarm optimization, and multi objective particle swarm optimization based on crowing distance mechanism, have been used to determine the process variable combinations for the multiple objective functions. In multi-objective optimization, there are no single optimal process variable combination due to conflicting nature of objective functions. Four cases have been considered after assigning different combination of weights

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Zhu, Xue, and Yeon Joo Chae. "The Effects of Authoritarian and Transformational Leadership on In-Role Performance: The Moderating Role of Power Distance Orientation and Time-with-Leader." Korean Academy Of Leadership 13, no. 4 (2022): 3–32. http://dx.doi.org/10.22243/tklq.2022.13.4.3.

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Focusing on recent trends in leadership research, this study tries to identify the effectiveness of authoritarian leadership by comparing effects of authoritarian with transformational leadership on in-role performance. Furthermore, this study investigates the conditions that limit effectiveness of two leadership styles positing power distance orientation and time-with-leader as moderating variables. In particular, although the time-with-leader is not widely known as a critical variable in leadership research, it needs to be discussed in leadership studies considering the reality of less face-

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Liu, Hong Liang, Wei Song, Peng Yu Na, Ming Li, and Pei Yang. "The Analysis of Similarity Measure Function in Image Matching Algorithms." Advanced Materials Research 842 (November 2013): 649–53. http://dx.doi.org/10.4028/www.scientific.net/amr.842.649.

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Similarity measure function is one of the most important factors influencing the matching precision in the field of computer vision. In this paper, a survey is done on the application frequency of distance similarity measure methods and related similarity measure methods, also the statistic characteristic is been given. The significance of Measure functions variable parameters in image matching is showed. In the real time processing aspect, drawn the conclusion that Manhattan distance measure is the fastest, Euclidean distance take second place, correlation coefficient is worst. However, in th

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Li, Chong, Cunjin Lu, Jinpeng Xu, Kai Zhang, Shiming Liu, and Hui Zhao. "Diffusion Mechanism of Variable-Rate Grouting in Water Prevention and Control of Coal Mine." Water 16, no. 19 (2024): 2814. http://dx.doi.org/10.3390/w16192814.

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Regional grouting treatment is an effective technical means to prevent mine water disasters, and the grouting effect is affected by many factors. In actual grouting engineering, the single constant-rate grouting method is often transformed into a variable-parameter grouting process. However, research on grouting rates has been insufficient. This investigation focused on the issue of “the diffusion law of variable-rate grouting slurry in regional governance”. Methods such as theoretical analysis, numerical simulation, and field verification were used to evaluate the diffusion mechanism of varia

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Skrickij, Viktor, and Marijonas Bogdevičius. "VEHICLE GEARBOX DYNAMICS: CENTRE DISTANCE INFLUENCE ON MESH STIFFNESS AND SPUR GEAR DYNAMICS." TRANSPORT 25, no. 3 (2010): 278–86. http://dx.doi.org/10.3846/transport.2010.34.

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Vehicle gearbox dynamics is characterized by time varying mesh stiffness. The paper presents a survey of methods used for determining mesh stiffness and the analysis of the centre distance influence on it. The refined mathematical transmission model presenting the centre distance as a variable is presented. The centre distance error as well as backlash and bearing flexibility is defined and the influence of these factors on mesh stiffness and spur gear dynamics is investigated. The results obtained from this paper may be used in gear‐box diagnostics.

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Sun, Jie, Peng Xu, MingLi Chen, and Jianghong Xue. "Forced Vibration of Time-Varying Elevator Traction System." Strojniški vestnik - Journal of Mechanical Engineering 70, no. 3-4 (2024): 170–80. http://dx.doi.org/10.5545/sv-jme.2023.852.

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This paper proposes a theoretical model for the forced vibration of time-varying elevator traction systems caused by eccentric excitation of the traction machine. Based on the Hamilton principle and a variational principle with variable boundaries, the equations of motion and the complex boundary condition of a time-varying elevator traction system are established. A quantitative formula between the angular velocity of the traction machine, the diameter of the traction wheel, the elevator running distance and the running time is put forward. It is found that when the maximum values of accelera

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Buneo, C. A., J. F. Soechting, and M. Flanders. "Muscle activation patterns for reaching: the representation of distance and time." Journal of Neurophysiology 71, no. 4 (1994): 1546–58. http://dx.doi.org/10.1152/jn.1994.71.4.1546.

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1. The timing and intensity of phasic muscle activation were related to the distance of reaching movements of the human arm. We dissociated phasic components of muscle activation from complete muscle activation waveforms by subtracting waveforms obtained during very slow movements. 2. We recorded electromyographic (EMG) activity from elbow and/or shoulder muscles as standing subjects reached forward and upward to targets at four distances. Accuracy was deemphasized and no terminal corrections were allowed. In the first part of the experiment subjects were asked to move at their preferred speed

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Bostelmann, J., and C. Heipke. "GLOBAL BUNDLE ADJUSTMENT WITH VARIABLE ORIENTATION POINT DISTANCE FOR PRECISE MARS EXPRESS ORBIT RECONSTRUCTION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 13, 2016): 361–68. http://dx.doi.org/10.5194/isprs-archives-xli-b4-361-2016.

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The photogrammetric bundle adjustment of line scanner image data requires a precise description of the time-dependent image orientation. For this task exterior orientation parameters of discrete points are used to model position and viewing direction of a camera trajectory via polynomials. This paper investigates the influence of the distance between these orientation points on the quality of trajectory modeling. A new method adapts the distance along the trajectory to the available image information. Compared to a constant distance as used previously, a better reconstruction of the exterior o

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Bostelmann, J., and C. Heipke. "GLOBAL BUNDLE ADJUSTMENT WITH VARIABLE ORIENTATION POINT DISTANCE FOR PRECISE MARS EXPRESS ORBIT RECONSTRUCTION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B4 (June 13, 2016): 361–68. http://dx.doi.org/10.5194/isprsarchives-xli-b4-361-2016.

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The photogrammetric bundle adjustment of line scanner image data requires a precise description of the time-dependent image orientation. For this task exterior orientation parameters of discrete points are used to model position and viewing direction of a camera trajectory via polynomials. This paper investigates the influence of the distance between these orientation points on the quality of trajectory modeling. A new method adapts the distance along the trajectory to the available image information. Compared to a constant distance as used previously, a better reconstruction of the exterior o

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Basuki, K. H., B. Haryadi, and B. Riyanto. "Analysis of Potential Mass Public Transport Choice Using Geographic Information System (Case Study: Commuter Line Jakarta – Bogor)." IOP Conference Series: Earth and Environmental Science 887, no. 1 (2021): 012031. http://dx.doi.org/10.1088/1755-1315/887/1/012031.

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Abstract Mode choice by travellers is carried out with several considerations. The interesting point is, some public transport users have their private vehicles. No research has described how many travellers can choose the mode and how significant their shift is to mass public transportation. The aim of research was carried out by analysing the potential for selecting mass public transportation by considering the socio-demographic, economic and vehicle ownership characteristics with the variable distance, time and travel costs based on user preferences. According to the special condition, mode

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Carlin, Jeffrey L., Peter S. Ferguson, A. Katherina Vivas, Neven Caplar, and Konstantin Malanchev. "An Outer-disk SX Phe Variable Star in Rubin Data Preview 1." Research Notes of the AAS 9, no. 7 (2025): 161. https://doi.org/10.3847/2515-5172/adeab0.

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Abstract We report the discovery of an SX Phoenicis-type pulsating variable star via 217 epochs of time-series photometry from the Vera C. Rubin Observatory’s Data Preview 1. The star, designated LSST-DP1-O-614435753623041404 (or LSST-C25_var1 for short), has mean magnitudes of (〈g〉, 〈r〉) = (18.65, 18.63), with pulsation amplitudes of (0.60, 0.38) mag in these bands. Its period is 0.0767day (1.841 hr), typical of SX Phe pulsators. We derive a distance to the star of 16.6 kpc based on an SX Phe period–luminosity relation. Its position ∼5 kpc from the Galactic plane, in the outer Milky Way disk

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Croce, Ronald, Michael Horvat, and Glenn Roswal. "Coincident Timing by Nondisabled, Mentally Retarded, and Traumatic Brain-Injured Individuals under Varying Target-Exposure Conditions." Perceptual and Motor Skills 80, no. 2 (1995): 487–96. http://dx.doi.org/10.2466/pms.1995.80.2.487.

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Coincident timing by 15 nondisabled individuals, 15 mentally retarded and 15 traumatically brain injured was measured under varying target-exposure conditions. Absolute constant error, constant error, and variable error were analyzed in separate repeated-measures analyses of variance for early performance (first block of practice), late performance (last block of practice), and retention (last block of retention). Subjects with mental retardation displayed the least accurate and most variable coincident-timing responses. Nondisabled subjects were most influenced by target-exposure time; subjec

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Kim, Wootaek, Daekuk Kim, Dokyeong Lee, Iljoo Moon, and Jinwook Lee. "Analysis of Optimal Shift Pattern Based on Continuously Variable Transmission of Electric Vehicle for Improving Driving Distance." Applied Sciences 13, no. 2 (2023): 1190. http://dx.doi.org/10.3390/app13021190.

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Extending the maximum driving distance of an electric vehicle would be beneficial given these vehicles’ long charging time and limited battery capacity and to improve electricity consumption. Research on the optimal development of the powertrain is essential because the efficiency of an electric motor varies according to the operating point. In this study, we developed a simulation analysis model with a continuously variable transmission. based on the commercial electric vehicle (Company B) model and using actual vehicle driving data supplied by the Argonne National Laboratory. The shift patte

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