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Journal articles on the topic 'Free-form input'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Aaron, Sunu A. George, Sabu Basil, Jose Bonia, George Ashin, and C. P. Premchand. "GestureMath: Free - Form Math Solver." Journal of Advancement in Parallel Computing 8, no. 3 (2025): 1–10. https://doi.org/10.5281/zenodo.15517219.

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<em>An innovative mathematical tool leveraging gesture-based interaction redefines how calculations are performed, moving away from traditional input methods like keyboards or touchscreens. A cutting-edge system enables users to perform tasks such as writing mathematical expressions, pausing input, clearing the workspace and computing results using intuitive hand gestures. Unlike standard calculators or software that rely on rigid syntax or button-based inputs, this tool offers a more flexible, engaging and inclusive experience. It supports free-form handwriting and accommodates the diverse ne

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2

Jehle, Fred. "A Free-Form Dialog Program in Spanish." CALICO Journal 5, no. 2 (2013): 11–22. http://dx.doi.org/10.1558/cj.v5i2.11-22.

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SPANLAP is a computer program which attempts to engage students of Spanish in a free-form written dialog by allowing them to ask questions. The program performs morphological, syntactic, and some semantic parsing of the student input, and either generates a response according to predetermined patterns or selects a response written by an instructor. Although unfinished, the program is functional, and demonstrates the feasibility of communicative programs for students of foreign languages.

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Huo, Feng, and Aun Neow Poo. "Free-Form Two-Dimensional Contour Error Estimation Based on NURBS Interpolation." Applied Mechanics and Materials 157-158 (February 2012): 236–40. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.236.

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Contouring control is in wide use in the manufacturing industry. To achieve accurate contouring control, accurate control error estimation is necessary. However, for free-form contours, there is a lack of effective algorithms for accurately estimating contour errors. This paper proposes a new algorithm for contour error estimation based on NURBS interpolation (CEEBNI). The reference input points closest to the current position is searched. Based on the NURBS interpolation, certain discrete reference input points are then used to reconstruct the NURBS curve. Finally, the contour error is estima

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Kameyama, Ken-ichi, and Koichi Ohtomi. "A Shape Modeling System with a Volume Scanning Display and Multisensory Input Device." Presence: Teleoperators and Virtual Environments 2, no. 2 (1993): 104–11. http://dx.doi.org/10.1162/pres.1993.2.2.104.

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This paper describes a newly developed 3-D shape modeling system, in which a user can design a free-form surface as if he or she actually manipulates a flexible object made from rubber or clay. Such reality can be realized in the system without any encumbering devices like goggles, glasses, or gloves, which is impossible in conventional virtual reality systems. The system is composed of a volume scanning display for presenting a surface image in a real 3-D space, a multisensory input device for detecting the force for deformation, and a half-silvered mirror for spatial superposition of the ima

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Ghosh, Agniva, Liliya L. R. Williams, and Jori Liesenborgs. "Free-form grale lens inversion of galaxy clusters with up to 1000 multiple images." Monthly Notices of the Royal Astronomical Society 494, no. 3 (2020): 3998–4014. http://dx.doi.org/10.1093/mnras/staa962.

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ABSTRACT In the near future, ultra deep observations of galaxy clusters with Hubble Space Telescope or James Webb Space Telescope will uncover 300–1000 lensed multiple images, increasing the current count per cluster by up to an order of magnitude. This will further refine our view of clusters, leading to a more accurate and precise mapping of the total and dark matter distribution in clusters, and enabling a better understanding of background galaxy population and their luminosity functions. However, to effectively use that many images as input to lens inversion will require a re-evaluation o

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Shang, Yanling, and Jing Xie. "Global Stabilization of Nonholonomic Chained Form Systems with Input Delay." Abstract and Applied Analysis 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/156457.

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This paper investigates the global stabilization problem for a class of nonholonomic systems in chained form with input delay. A particular transformation is introduced to convert the original time-delay system into a delay-free form. Then, by using input-state-scaling technique and the method of sliding mode control, a constructive design procedure for state feedback control is given, which can guarantee that all the system states globally asymptotically converge to the origin. An illustrative example is also provided to demonstrate the effectiveness of the proposed scheme.

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Salem, Mohamed E. M., Qiang Wang, and Ma Hong Xu. "Application of neural network fitting for modeling the pneumatic networks bending soft actuator behavior." Engineering Research Express 4, no. 1 (2022): 015032. http://dx.doi.org/10.1088/2631-8695/ac58e7.

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Abstract Soft actuators have recently gained a lot of interests as an emerging topic, although complete methodologies for modeling soft actuators are still missing. Identifying and forecasting the behaviour of soft actuators is difficult due to the nonlinear behaviour of the materials used, the complicated geometries they form, and the wide range of motions they produce. In this paper, we demonstrated how to use neural network technology to describe the motion and produced force that the pneumatic network bending soft actuator can create at various input pressures. To confirm the results, thre

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Zhang, Li Qiang, and Ye Cui Yan. "Virtual Five-Axis Milling of Free-Form Surface-Part I: Process Modeling." Applied Mechanics and Materials 29-32 (August 2010): 424–29. http://dx.doi.org/10.4028/www.scientific.net/amm.29-32.424.

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In free-form surface machining, it is essential to optimize the feedrate in order to improve the machining efficiency. This work is the first of a two part paper on cutting force prediction and feedrate optimization for five-axis milling. Conservative cutting parameters have been mostly used since there was a lack of physical models and optimization tools. Part and tool deflections under high cutting forces may result in poor part quality. The extracted cutter workpiece engagements are used as input to a force prediction model. The predicted cutting forces are shown to be in reasonable agreeme

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Herranz, Victoria, Diego Napp, and Carmen Perea. "Weight-2 input sequences of $ 1/n $ convolutional codes from linear systems point of view." AIMS Mathematics 8, no. 1 (2022): 713–32. http://dx.doi.org/10.3934/math.2023034.

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<abstract><p>Convolutional codes form an important class of codes that have memory. One natural way to study these codes is by means of input state output representations. In this paper we study the minimum (Hamming) weight among codewords produced by input sequences of weight two. In this paper, we consider rate $ 1/n $ and use the linear system setting called $ (A, B, C, D) $ input-state-space representations of convolutional codes for our analysis. Previous results on this area were recently derived assuming that the matrix $ A $, in the input-state-output representation, is non

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Wesche, Gerold. "A User Interface for Free-Form Shape Design at the Responsive Workbench." Journal of Computing and Information Science in Engineering 4, no. 3 (2004): 178–85. http://dx.doi.org/10.1115/1.1763934.

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This paper presents a virtual environment based user interface for the conceptual design of free form surface models from scratch. The user performs sketching and elaboration directly within a projection-based, table-like environment. He uses head-tracked stereo glasses and simple input devices. We describe user interface components for creation, manipulation, and application control, which were specifically designed for use in a 3D environment. These components are part of a two-handed interaction scheme. In our modeling approach, the user draws curves and constructs a curve network that form

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Gough, John. "The Global versus Local Hamiltonian Description of Quantum Input-Output Theory." Open Systems & Information Dynamics 22, no. 02 (2015): 1550009. http://dx.doi.org/10.1142/s1230161215500092.

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The aim of this paper is to derive the global Hamiltonian form for a quantum system and bath, or more generally a quantum network with multiple quantum input field connections, based on the local descriptions. We give a new simple argument which shows that the global Hamiltonian for a single Markov component arises as the singular perturbation of the free translation operator. We show that the Fermi analogue takes an equivalent form provided the parity of the coefficients is correctly specified. This allows us to immediately extend the theory of quantum feedback networks to Fermi systems.

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Zhang, Nan, Jingyi Su, Jiahui Huang, Xinyuan Long, and Hua Chen. "Intelligent Model-Free Control for Power Line Inspection Robots: Tackling Input Time Delays with Data-Driven Solutions." Processes 12, no. 11 (2024): 2430. http://dx.doi.org/10.3390/pr12112430.

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This article presents an innovative approach to model-free adaptive control designed for power line inspection robots facing challenges with input time delays. The strategy begins by employing a compact-form dynamic linearization technique to transform the original system into a data-driven model. Subsequently, utilizing real-time input and output information, the system’s pseudo-partial derivatives are assessed online. Leveraging these assessment parameters, a weighted one-step prediction control mechanism is designed, and a compact-form dynamic linearization model-free adaptive control frame

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13

Mnif, Faïçal. "Predictor-based stabilization for chained form systems with input time delay." Archives of Control Sciences 26, no. 4 (2016): 515–25. http://dx.doi.org/10.1515/acsc-2016-0028.

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Abstract This note addresses the stabilization problem of nonlinear chained-form systems with input time delay. We first employ the so-called σ-process transformation that renders the feedback system under a linear form. We introduce a particular transformation to convert the original system into a delay-free system. Finally, we apply a state feedback control, which guarantees a quasi-exponential stabilization to all the system states, which in turn converge exponentially to zero. Then we employ the so-called -type control to achieve a quasi-exponential stabilization of the subsequent system.

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Kalmbach, Brian E., Tatsuya Ohyama, and Michael D. Mauk. "Temporal Patterns of Inputs to Cerebellum Necessary and Sufficient for Trace Eyelid Conditioning." Journal of Neurophysiology 104, no. 2 (2010): 627–40. http://dx.doi.org/10.1152/jn.00169.2010.

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Trace eyelid conditioning is a form of associative learning that requires several forebrain structures and cerebellum. Previous work suggests that at least two conditioned stimulus (CS)-driven signals are available to the cerebellum via mossy fiber inputs during trace conditioning: one driven by and terminating with the tone and a second driven by medial prefrontal cortex (mPFC) that persists through the stimulus-free trace interval to overlap in time with the unconditioned stimulus (US). We used electric stimulation of mossy fibers to determine whether this pattern of dual inputs is necessary

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Strydom, Stefan, Andrei Michael Dreyer, and Brink van der Merwe. "Automatic assignment of diagnosis codes to free-form text medical note." JUCS - Journal of Universal Computer Science 29, no. 4 (2023): 349–73. http://dx.doi.org/10.3897/jucs.89923.

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International Classification of Disease (ICD) coding plays a significant role in classify-ing morbidity and mortality rates. Currently, ICD codes are assigned to a patient&rsquo;s medical record by hand by medical practitioners or specialist clinical coders. This practice is prone to errors, and training skilled clinical coders requires time and human resources. Automatic prediction of ICD codes can help alleviate this burden. In this paper, we propose a transformer-based architecture with label-wise attention for predicting ICD codes on a medical dataset. The transformer model is first pr

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Strydom, Stefan, Andrei Michael Dreyer, and der Merwe Brink van. "Automatic assignment of diagnosis codes to free-form text medical note." JUCS - Journal of Universal Computer Science 29, no. (4) (2023): 349–73. https://doi.org/10.3897/jucs.89923.

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International Classification of Disease (ICD) coding plays a significant role in classify-ing morbidity and mortality rates. Currently, ICD codes are assigned to a patient's medical record by hand by medical practitioners or specialist clinical coders. This practice is prone to errors, and training skilled clinical coders requires time and human resources. Automatic prediction of ICD codes can help alleviate this burden. In this paper, we propose a transformer-based architecture with label-wise attention for predicting ICD codes on a medical dataset. The transformer model is first pre-trained

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Sreeram Reddy, G., V. V. Satyanarayana, M. Manzoor Hussian, and J. Jagadesh Kumar. "Response prediction of reverse engineered free form surface by design of experiments." Journal of Mechanical Engineering and Sciences 12, no. 4 (2018): 4231–42. http://dx.doi.org/10.15282/jmes.12.4.2018.18.0364.

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Reverse engineering is a new technique employed in product design wherein original drawings or pertinent technical data are not available. Reverse engineering technology acquires the conceptual designs from the existing products and consequently creates digital product models. In the product design these digital products are employed with optimization principles. The investigation in this paper encompasses 3-D reconstruction of products by the reverse engineering technique and consequently identifying the deviations between the original product and the reverse engineered model. Design of exper

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Lv, Zhuo-Xuan, and Jian Liao. "Fractional-Order Model-Free Adaptive Control with High Order Estimation." Mathematics 12, no. 5 (2024): 784. http://dx.doi.org/10.3390/math12050784.

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This paper concerns an improved model-free adaptive fractional-order control with a high-order pseudo-partial derivative for uncertain discrete-time nonlinear systems. Firstly, a new equivalent model is obtained by employing the Grünwald–Letnikov (G-L) fractional-order difference of the input in a compact-form dynamic linearization. Then, the pseudo-partial derivative (PPD) is derived using a high-order estimation algorithm, which provides more PPD information than the previous time. A discrete-time model-free adaptive fractional-order controller is proposed, which utilizes more past input–out

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Türkmen, A., and A. Verçin. "Quantum Error Correction in the Presence of Initial System-Environment Correlations." Open Systems & Information Dynamics 27, no. 02 (2020): 2050009. http://dx.doi.org/10.1142/s1230161220500092.

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Quantum error correction is studied in a framework consisting of an open quantum system and its environment, jointly subjected to a unitary action, and an interaction-free reference system. It has been shown that coherent information between the initially correlated open system and reference system is conserved in the transmission stage of any quantum communication process, provided that the tripartite input is any pure Markov state and the overall evolution preserves its form. This conservation constitutes the necessary and sufficient condition for accomplishment of perfect error correction b

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HANNIEL, I., M. RAMANATHAN, G. ELBER, and M. S. KIM. "PRECISE VORONOI CELL EXTRACTION OF FREE-FORM PLANAR PIECEWISE C1-CONTINUOUS CLOSED RATIONAL CURVES." International Journal of Computational Geometry & Applications 17, no. 05 (2007): 453–86. http://dx.doi.org/10.1142/s0218195907002446.

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We present an algorithm for generating Voronoi cells for a set of planar piecewise C1-continuous closed rational curves, which is precise up to machine precision. The algorithm starts with the symbolically generated bisectors for pairs of C1-continuous curve segments (C(t),Ci(r)). The bisectors are represented implicitly in the tr-parameter space. Then, they are properly trimmed after being split into monotone pieces. The trimming procedure uses the orientation of the original curves as well as their curvature fields, resulting in a set of trimmed-bisector segments represented as implicit curv

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Boier-Martin, Ioana, Remi Ronfard, and Fausto Bernardini. "Detail-Preserving Variational Surface Design With Multiresolution Constraints." Journal of Computing and Information Science in Engineering 5, no. 2 (2005): 104–10. http://dx.doi.org/10.1115/1.1891824.

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We present a variational framework for rapid shape prototyping. The modeled shape is represented as a Catmull-Clark multiresolution subdivision surface which is interactively deformed by direct user input. Free-form design goals are formulated as constraints on the shape and the modeling problem is cast into a constrained optimization one. The focus of this paper is on handling multiresolution constraints of different kinds and on preserving surface details throughout the deformation process. Our approach eliminates the need for an explicit decomposition of the input model into frequency bands

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Lee, Joo-sung, Nahyun Kwon, Nam-hyuk Ham, Jae-jun Kim, and Yong-han Ahn. "BIM-Based Digital Fabrication Process for a Free-Form Building Project in South Korea." Advances in Civil Engineering 2019 (May 23, 2019): 1–18. http://dx.doi.org/10.1155/2019/4163625.

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Since the concept of building information modeling (BIM) was introduced in South Korea in 2008, digital fabrication concerning free-form shapes and complex parametric information has been expanding owing to the development of BIM software and tools. However, the digital fabrication process is inadequate in terms of efficiency and productivity because of the need to convert from conventional two-dimensional (2D) drawings to a BIM design; this adversely affects the unified design, fabrication, installation, and inspection processes. Moreover, an optimized process has not been developed thus far

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Jakowluk, Wiktor. "Free Final Time Input Design Problem for Robust Entropy-Like System Parameter Estimation." Entropy 20, no. 7 (2018): 528. http://dx.doi.org/10.3390/e20070528.

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In this paper, a novel method is proposed to design a free final time input signal, which is then used in the robust system identification process. The solution of the constrained optimal input design problem is based on the minimization of an extra state variable representing the free final time scaling factor, formulated in the Bolza functional form, subject to the D-efficiency constraint as well as the input energy constraint. The objective function used for the model of the system identification provides robustness regarding the outlying data and was constructed using the so-called Entropy

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Lee, James F. "THE INCIDENTAL ACQUISITION OF SPANISH." Studies in Second Language Acquisition 24, no. 1 (2002): 55–80. http://dx.doi.org/10.1017/s0272263102001031.

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The present study examines the processing of Spanish future tense morphology incidentally while reading in a second language. Previous L1 and L2 reading research has demonstrated that readers can acquire new vocabulary as a result of reading, but can they also acquire formal properties of the second language grammatical system? The participants in the present study had no previous knowledge of future tense morphology such that, as they read the passage used in the study, they encountered the target form for the first time, which is an accented á on the end of an infinitive—for example, depende

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Ahirwal, Ramratan, Yogesh Singh Rajput, and Dr Yogendra Kumar Jain. "Ghost-Free High Dynamic Range Imaging Using Histogram Separation and Edge Preserving Denoising." INTERNATIONAL JOURNAL OF COMPUTERS & TECHNOLOGY 12, no. 3 (2014): 3329–37. http://dx.doi.org/10.24297/ijct.v12i3.3242.

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In this paper, we introduce a ghost-free High Dynamic Range imaging algorithm for obtaining ghost-free high dynamicrange (HDR) images. The multiple image fusion based HDR method work only on condition that there is no movement ofcamera and object when capturing multiple, differently exposed low dynamic range (LDR) images. The proposed algorithmmakes three LDR images from a single input image to remove such an unrealistic condition. For this purpose a histogramseparation method is proposed in the algorithm for generating three LDR images by stretching each separated histogram.An edge-preserving

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Gupta, Shweta, Avinash Kishore, Muzna Fatima Alvi, and Vartika Singh. "Designing better input support programs: Lessons from zinc subsidies in Andhra Pradesh, India." PLOS ONE 15, no. 12 (2020): e0242161. http://dx.doi.org/10.1371/journal.pone.0242161.

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India has one of the largest agricultural input support programs in the world, delivered in the form of subsidies to farmers, raising concerns about its sustainability. This paper evaluates the performance of one such support, the micronutrient subsidy program in the state of Andhra Pradesh (AP) and presents a case for providing this support in the form of direct cash transfers. Under the program, key soil micronutrients- zinc, boron, and gypsum were distributed free of cost to farmers living in micronutrient-deficient areas, with identification and targeting managed entirely by the state. We

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Luo, Yuhan, Bongshin Lee, Young-Ho Kim, and Eun Kyoung Choe. "NoteWordy: investigating touch and speech input on smartphones for personal data capture." Proceedings of the ACM on Human-Computer Interaction 6, ISS (2022): 568–91. http://dx.doi.org/10.1145/3567734.

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Speech as a natural and low-burden input modality has great potential to support personal data capture. However, little is known about how people use speech input, together with traditional touch input, to capture different types of data in self-tracking contexts. In this work, we designed and developed NoteWordy, a multimodal self-tracking application integrating touch and speech input, and deployed it in the context of productivity tracking for two weeks (N = 17). Our participants used the two input modalities differently, depending on the data type as well as personal preferences, error tol

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Thomas, Anita. "The influence of lexical aspect and input frequency in the L2 French of adult beginners." Nordic Journal of Linguistics 33, no. 2 (2010): 169–96. http://dx.doi.org/10.1017/s0332586510000144.

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This article presents a study of the variation found in the oral production of verbs in L2 French by adult beginners with Swedish as L1. The study deals with the production of the two main forms of regular verbs in spoken French, a short form /parl/ and a long form /parle/, in present-tense and infinitive contexts. Learners at beginner stages use these two forms invariantly in both finite and non-finite contexts. The aim of this study is to investigate the choice of the invariant forms made by the learners. This is done by testing the influence of lexical aspect and input frequency. The invest

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Wang, Xiaoyu, Yuanyuan Gao, Guangna Zhang, Mingxi Guo, and Kui Xu. "Security performance analysis for cell-free massive multiple-input multiple-output system with multi-antenna access points deployment in presence of active eavesdropping." International Journal of Distributed Sensor Networks 18, no. 8 (2022): 155013292211145. http://dx.doi.org/10.1177/15501329221114535.

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This article investigates the influence of multiple-antenna deployment at access points on physical layer security under cell-free massive multiple-input multiple-output systems. To embody the concept of network multiple-input multiple-output, cell-free massive multiple-input multiple-output employs a great deal of geographically distributed access points, which jointly serve multiple users in the same frequency-time resource. Assuming a malicious active eavesdropper having knowledge of instantaneous channel state information, we derive the asymptotic closed-form expression of the achievable s

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Nederhof, Mark-Jan. "Practical Experiments with Regular Approximation of Context-Free Languages." Computational Linguistics 26, no. 1 (2000): 17–44. http://dx.doi.org/10.1162/089120100561610.

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Several methods are discussed that construct a finite automaton given a context-free grammar, including both methods that lead to subsets and those that lead to supersets of the original context-free language. Some of these methods of regular approximation are new, and some others are presented here in a more refined form with respect to existing literature. Practical experiments with the different methods of regular approximation are performed for spoken-language input: hypotheses from a speech recognizer are filtered through a finite automaton.

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BELIAEV, A. Yu. "Solvability of free boundary problems for steady groundwater flow." European Journal of Applied Mathematics 26, no. 6 (2015): 821–47. http://dx.doi.org/10.1017/s0956792515000182.

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In this paper the free boundary problem for groundwater phreatic surface is represented in the form of a variational principle. It is proved that the flow domain Ω that solves the problem is a minimizer of some functional Λ(Ω). Weak solutions are introduced as minimizers of the lower semi-continuous regularization of Λ(⋅). Within this approach the existence of weak solutions is proved for a wide class of input data.

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Yamaguchi, Hiroaki, and Tamio Arai. "A Conversion of a Cooperative Transportation System with Two Car-Like Mobile Robots into Two-Chain, Single-Generator Chained Form and its Steering." Journal of Robotics and Mechatronics 21, no. 1 (2009): 57–65. http://dx.doi.org/10.20965/jrm.2009.p0057.

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This paper presents a novel methodology for steering a cooperative transportation system comprising two car-like mobile robots coupled together via a carrier. The system is a three-input seven-variable drift-free nonholonomic mechanical system. The three control inputs are the moving velocity of the first mobile robot and the steering angular velocities of the two mobile robots. The seven variables are the positions of the first mobile robot along the x- and y-axes, its steering angle, its orientation, the orientation of the carrier, the steering angle of the second mobile robot, and its orien

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MUREŞAN, Mihaela. "Assessment of free-living marine nematodes community from the NW Romanian Black Sea shelf.." Geo-Eco-Marina No 18/2012 (December 31, 2012): 133–45. https://doi.org/10.5281/zenodo.56876.

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Abstract: Diversity and distribution of abundance data for the free-living marine nematodes inhabiting the NW Black Sea shelf were assessed based on 30 samples collected from the NW Black Sea shelf in 2010. Trophic structure of nematodes populations was established in order to determine whether they form specific associations in the area influenced by the Danube input.

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Yamamoto, A., Y. Hasegawa, and N. Kasagi. "Optimal control of dissimilar heat and momentum transfer in a fully developed turbulent channel flow." Journal of Fluid Mechanics 733 (September 23, 2013): 189–220. http://dx.doi.org/10.1017/jfm.2013.436.

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AbstractSustained friction drag reduction and heat transfer augmentation are simultaneously achieved in a fully developed channel flow where the averaged transport equations and wall boundary conditions for momentum and heat have identical form. Zero-net-mass-flux wall blowing and suction is assumed as a control input and its spatio-temporal distribution is determined based on optimal control theory. When the root-mean-square value of the control input is 5 % of the bulk mean velocity, the friction drag is decreased by 24 % from the uncontrolled value, whereas the heat transfer is more than do

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Alessandro, Sebastiani, Peña Alfredo, and Troldborg Niels. "Numerical evaluation of multivariate power curves for wind turbines in wakes using nacelle lidars." Renewable Energy 202 (November 23, 2022): 419–31. https://doi.org/10.1016/j.renene.2022.11.081.

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In this work, we define multivariate wind turbine power curves in the form of multivariable polynomial regressions, whose input variables are several wind speed and turbulence measurements retrieved with nacelle lidars. We use a dataset of synthetic power performance measurements including both waked and wake-free conditions. The dataset is generated through aeroelastic simulations combined with both virtual nacelle lidars and the dynamic wake meandering model. A feature-selection algorithm is used to select the input variables among the available measurements, showing that the optimal model i

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Samanta, Soumitra, Steve O’Hagan, Neil Swainston, Timothy J. Roberts, and Douglas B. Kell. "VAE-Sim: A Novel Molecular Similarity Measure Based on a Variational Autoencoder." Molecules 25, no. 15 (2020): 3446. http://dx.doi.org/10.3390/molecules25153446.

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Molecular similarity is an elusive but core “unsupervised” cheminformatics concept, yet different “fingerprint” encodings of molecular structures return very different similarity values, even when using the same similarity metric. Each encoding may be of value when applied to other problems with objective or target functions, implying that a priori none are “better” than the others, nor than encoding-free metrics such as maximum common substructure (MCSS). We here introduce a novel approach to molecular similarity, in the form of a variational autoencoder (VAE). This learns the joint distribut

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Ivanov, Konstantin Samson, and Baurjan Tultaev. "Gear Mechanism with Force Differential Constraint." Applied Mechanics and Materials 436 (October 2013): 71–79. http://dx.doi.org/10.4028/www.scientific.net/amm.436.71.

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Force differential constraint in the form of the adapting device (for example, liquid hydro clutch) provides adaptation of the mechanism to variable loading. Force differential constraint can be superimposed on input structural group by connected kinematic chain without the adapting device. It allows to create the simple adaptive mechanism (for example, CVT) and to provide force adaptation of the mechanism lost-free powers.

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Kutsenko, Oleksandr, and Serhii Kovalenko. "QUASI-ANALYTIC METHOD OF LINEAR DYNAMIC SYSTEMS INVERSION." Bulletin of National Technical University "KhPI". Series: System Analysis, Control and Information Technologies, no. 2 (8) (December 23, 2022): 45–50. http://dx.doi.org/10.20998/2079-0023.2022.02.07.

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The problem of inversion of dynamic systems has become widespread while solving the problems of control, identification, and measurement problems arising during the design and research of electrical and mechanical dynamic systems. Inverting is an effective way of implementing disturbance control processes, as well as in combined control systems with a predictive model. The analysis of information sources showed that in the practical solution of most inversion problems, a number of difficulties arise, which are associated with the high sensitivity of the results in relation to the accuracy of t

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Grossman, Gene M., Elhanan Helpman, and Stephen J. Redding. "When Tariffs Disrupt Global Supply Chains." American Economic Review 114, no. 4 (2024): 988–1029. http://dx.doi.org/10.1257/aer.20211519.

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We study unanticipated tariffs in a setting with firm-to-firm supply relationships. Firms conduct costly searches and negotiate with potential suppliers that pass a reservation level of match productivity. Global supply chains form in anticipation of free trade. Then, the home government surprises with an input tariff. This can lead to renegotiation with initial suppliers or search for replacements. Calibrating the model’s parameters to match initial import shares and the estimated responses to the US tariffs imposed on China, we find an overall welfare loss of 0.12 percent of GDP, with substa

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Lei, Yuxiang, Yulei Sui, Shin Hwei Tan, and Qirun Zhang. "Recursive State Machine Guided Graph Folding for Context-Free Language Reachability." Proceedings of the ACM on Programming Languages 7, PLDI (2023): 318–42. http://dx.doi.org/10.1145/3591233.

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Context-free language reachability (CFL-reachability) is a fundamental framework for program analysis. A large variety of static analyses can be formulated as CFL-reachability problems, which determines whether specific source-sink pairs in an edge-labeled graph are connected by a reachable path, i.e., a path whose edge labels form a string accepted by the given CFL. Computing CFL-reachability is expensive. The fastest algorithm exhibits a slightly subcubic time complexity with respect to the input graph size. Improving the scalability of CFL-reachability is of practical interest, but reducing

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Wang, Haizhen, Huihua Jian, Jianhua Huang, and Yonghong Lan. "Fractional-Order MFAC with Application to DC Motor Speed Control System." Mathematics 13, no. 4 (2025): 610. https://doi.org/10.3390/math13040610.

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Model-free adaptive control (MFAC) can carry out various tasks using only I/O data, providing advantages such as lower operational costs, higher scalability and easier implementation. However, the robustness of MFAC remains an open problem. In this paper, a robust fractional-order model-free adaptive control (RFOMFAC) scheme is proposed to address the robust tracking control issue for a class of uncertain discrete-time nonlinear systems with bounded measurement disturbance. First, we use a fractional-order dynamic data model relating the relationship between the output signal and the fractiona

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Hofmann, Annette, and Gunnar Oldehaver. "Vertically Linked Industries, Product Quality and Minimum Quality Standards." German Economic Review 17, no. 1 (2016): 92–103. http://dx.doi.org/10.1111/geer.12067.

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Abstract This paper extends the seminal model of vertical product differentiation by Ronnen (1991) to a two-tier supply chain. While Ronnen considers the duopoly case, we add a vertical structure such that each downstream firm procures an input from a monopolistic upstream supplier. While simultaneous up- and downstream regulation in the form of a minimum quality standard restores Ronnen’s findings, if only one firm is regulated in the vertical chain, a free-rider effect results: all the bargaining power is given to the non-regulated member of the chain, which uses it to free-ride on the press

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RIGATOS, GERASIMOS, and EFTHYMIA RIGATOU. "SYNCHRONIZATION OF CIRCADIAN OSCILLATORS AND PROTEIN SYNTHESIS CONTROL USING THE DERIVATIVE-FREE NONLINEAR KALMAN FILTER." Journal of Biological Systems 22, no. 04 (2014): 631–57. http://dx.doi.org/10.1142/s0218339014500259.

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The paper proposes a new method for synchronization of coupled circadian cells and for nonlinear control of the associated protein synthesis process using differential flatness theory and the derivative-free nonlinear Kalman filter. By proving that the dynamic model of the FRQ protein synthesis is a differentially flat one, its transformation to the linear canonical (Brunovsky) form becomes possible. For the transformed model, one can find a state feedback control input that makes the oscillatory characteristics in the concentration of the FRQ protein vary according to desirable setpoints. To

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Manurung, Edison Hatoguan, Kasimir Sawito, Sri Prasetya Widodo, Abdul Mubarok, Dwi Purwanto, and Sitti Wardiningsih. "GERAKAN HIDUP BERSIH DAN SEHAT BEBAS SAMPAH DI DESA NAGRAK KEC. SUKARAJA KAB. BOGOR." Indonesian Collaboration Journal of Community Services (ICJCS) 2, no. 1 (2022): 58–64. http://dx.doi.org/10.53067/icjcs.v2i1.58.

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The application of clean and healthy living behaviors should be a daily habit. Although it seems simple, there are still many people who do not pay attention to the importance of clean and healthy living behaviors for healthy health, family, and the surrounding environment. Clean and healthy living behavior is a significant movement. Improve the quality of life and public health. Among the clean and healthy living behaviors is the habit of throwing garbage in its place and processing waste into useful items. The specific goal is 1) Improve understanding of healthy and waste-free living movemen

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Légère, Anne, Steven J. Shirtliffe, Anne Vanasse, and Robert H. Gulden. "Extreme Grain-Based Cropping Systems: When Herbicide-Free Weed Management Meets Conservation Tillage in Northern Climates." Weed Technology 27, no. 1 (2013): 204–11. http://dx.doi.org/10.1614/wt-d-12-00074.1.

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The challenges associated with the adoption of conservation tillage and/or low-input cropping systems, whether organic or herbicide-free, across Canada are shaped by scale, environment, and local practices. A study in eastern Canada captured the challenges of introducing low-input cropping systems in mature (20+ yr) tillage treatments in a barley/red clover/corn/soybean rotation. Each mature tillage system came with its own weed problems, but this did not affect crops such as barley and red clover, which produced similar yields across high and low input systems. However, some form of primary t

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Craven, Kelly D., and Prasun Ray. "More than Serendipity: The Potential to Manage Soil Carbon and Emissions While Promoting Low-Input Agriculture with Serendipitoid Mycorrhizae." Phytobiomes Journal 3, no. 3 (2019): 161–64. http://dx.doi.org/10.1094/pbiomes-12-18-0058-p.

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Organic matter (OM) has a tremendous influence on the biological, chemical, and physical properties of soils, making it a vital component of healthy agricultural systems. Release of the nutrients locked within soil OM requires the activity of soil microorganisms, primarily decomposers, to transform it into nutritive forms that can be used by other microbes and plants. OM turnover is a good thing, as it liberates the locked up nutrients. However, when this liberation is accomplished by free-living decomposer communities, i.e., those not typically forming relationships with plants, the carbon ma

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LI, XIN, and DAN ROTH. "Learning question classifiers: the role of semantic information." Natural Language Engineering 12, no. 3 (2005): 229–49. http://dx.doi.org/10.1017/s1351324905003955.

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To respond correctly to a free form factual question given a large collection of text data, one needs to understand the question to a level that allows determining some of the constraints the question imposes on a possible answer. These constraints may include a semantic classification of the sought after answer and may even suggest using different strategies when looking for and verifying a candidate answer. This work presents a machine learning approach to question classification. Guided by a layered semantic hierarchy of answer types, we develop a hierarchical classifier that classifies que

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Eri Anggraeni, Eny Maryanti, Cicik Suciati, and Nihlatul Qudus Sukma Nirwana. "TAX PLANNING, INFORMATION ASYMMETRY AND FREE CASH FLOW TO EARNINGS MANAGEMENT WITH GOOD CORPORATE GOVERNANCE AS A MODERATING VARIABLE." iBAF e-Proceedings 11, no. 1 (2024): 62–81. http://dx.doi.org/10.33102/ndsrp093.

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This research was conducted with the aim of examining the effect of tax planning, information asymmetry and free cash flow on earnings management, as well as good corporate governance as a moderator of the relationship between tax planning, information asymmetry and free cash flow on earnings management. The data used is in the form of annual reports of companies in the goods & consumer industry sector listed on the Indonesia Stock Exchange (IDX) for the 2018-2021 period. The method used is quantitative with an analytical tool in the form of multiple linear regression. The results show tha

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Habib, Muhammad, Ayyaz Hussain, Eid Rehman, et al. "Convolved Feature Vector Based Adaptive Fuzzy Filter for Image De-Noising." Applied Sciences 13, no. 8 (2023): 4861. http://dx.doi.org/10.3390/app13084861.

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In this paper, a convolved feature vector based adaptive fuzzy filter is proposed for impulse noise removal. The proposed filter follows traditional approach, i.e., detection of noisy pixels based on certain criteria followed by filtering process. In the first step, proposed noise detection mechanism initially selects a small layer of input image pixels, convolves it with a set of weighted kernels to form a convolved feature vector layer. This layer of features is then passed to fuzzy inference system, where fuzzy membership degrees and reduced set of fuzzy rules play an important part to clas

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Leuridan, J. M., D. L. Brown, and R. J. Allemang. "Time Domain Parameter Identification Methods for Linear Modal Analysis: A Unifying Approach." Journal of Vibration and Acoustics 108, no. 1 (1986): 1–8. http://dx.doi.org/10.1115/1.3269298.

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The paper describes a method that uses a multivariate model in the form of a nonhomogeneous finite difference equation to identify modal parameters of a mechanical structure. The modal parameters of this equation are estimable using a model that involves multiple input, multiple output vibration data. Thus, improved global estimates of modal parameters can be obtained, including the identification of highly coupled and pseudo-repeated modes of vibration. When the data are in the form of impulse or free decay responses, then the parameters of the homogeneous part of the equation can be estimate

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