检索结果-内蒙古大学图书馆

Simultaneous range and velocity measurement with Doppler single-photon lidar

Optica 2025年第5期12卷 604-613页

作者： Kitichotkul, Ruangrawee Rapp, Joshua Ma, Yanting Mansour, Hassan Department of Electrical and Computer Engineering Boston University BostonMA02215 United States Mitsubishi Electric Research Laboratories CambridgeMA02139 United States

Single-photon lidar (SPL) can accurately measure distances to targets from extremely weak reflections. However, the conventional wisdom holds that pulsed lidar cannot directly measure velocity, unlike other forms of lidar. We present a detection model for SPL that explicitly includes a target’s radial velocity, manifesting as a Doppler shift in the repetition frequency of the received laser pulse train. We propose an approach called Doppler SPL, comprising a pair of methods for jointly estimating range and velocity. Our first method estimates the Doppler shift via Fourier analysis of the detection times. The second method is a maximum likelihood (ML) estimator that can improve the Fourier estimate and enable joint estimation of the flux from signal and background *** derive the Cramér–Rao bound for the estimation problem and show via simulations that the ML estimator is statistically efficient across diverse acquisition settings. We also demonstrate simultaneous estimation of range with sub-centimeter accuracy and velocity with 0.1 m/s root mean square error for experimental measurements at 50 frames per second (fps), despite a signal-to-background ratio as low as 0.007. Finally, we present an example of a 3D video reconstruction at 120 fps with per-pixel velocity estimates. With the addition of velocimetry, Doppler SPL has the potential to introduce advanced capabilities in applications such as atmospheric monitoring or autonomous navigation. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Velocity measurement

来源：评论

学校读者我要写书评

暂无评论

PathDisGene: Discovering Informative Gene Groups for Disease Diagnosis Using Pathway-Disease Associations and a Grouping, Scoring, modeling-Based Machine Learning Approach

PathDisGene: Discovering Informative Gene Groups for Disease...

引用

18th international joint conference on Biomedical Engineering systems and Technologies, BIOSTEC 2025

作者： Qumsiyeh, Emma Bakir-Gungo, Burcu Yousef, Malik Faculty of Engineering and Information Technology Palestine Ahliya University Bethlehem Palestine Department of Computer Engineering Faculty of Engineering Abdullah Gul University Kayseri Turkey

Recently, machine learning and various feature selection techniques have become popular for understanding the relationship between genes, molecular pathways, and diseases. Integrating existing domain knowledge into biological data analysis has demonstrated considerable potential for finding new biomarkers with translational uses. This paper presents PathDisGene, an innovative machine-learning tool that integrates existing domain knowledge by utilizing a Grouping-Scoring-modeling (G-S-M) approach to discover associations among gene-pathway-disease. The first step in PathDisGene is the grouping component that associates genes according to their biological associations with diseases and pathways. This component uses the Comparative Toxicogenomics Database (CTD). Subsequently, the scoring component is applied to score each group and the highest-ranked groupings are then used to train the classifier. We test PathDisGene on ten GEO datasets and demonstrate its performance, where most of them are with high accuracy, sensitivity, specificity, and AUC values across various diseases. The tool's capacity to recognize new pathway-disease associations and uncover connections between pathways and diseases along their associated genes underscores its potential as a significant asset in promoting precision medicine and systems biology. © 2025 by SCITEPRESS– Science and Technology Publications, Lda.

关键词： Adversarial machine learning

来源：评论

学校读者我要写书评

暂无评论

Petri Net modeling of Root Hair Response to Phosphate Starvation in Arabidopsis Thaliana

Petri Net Modeling of Root Hair Response to Phosphate Starva...

引用

18th international joint conference on Biomedical Engineering systems and Technologies, BIOSTEC 2025

作者： Fijn, Amber H. B. Stiekema, Casper H. Boere, Stijn Višić, Marijan Cao, Lu Leiden Institute of Advanced Computer Science Leiden University Einsteinweg 55 Leiden Netherlands

Limited availability of inorganic phosphate (Pi) in soil is an important constraint to plant growth. In order to understand better the underlying mechanism of plant response to Pi, the response to phosphate starvation in Arabidopsis thaliana was investigated through use of Petri Nets, a formal language suitable for bio-modeling. A. thaliana displays a range of responses to deal with Pi starvation, but special attention was paid to root hair elongation in this study. A central player in the root hair pathway is the transcription factor ROOT HAIR DEFECTIVE6-LIKE 4(RSL4), which has been found to be upregulated during the Pi stress. A Petri Net was created which could simulate the gene regulatory networks responsible for the increase in root hair length, as well as the resulting increase in root hair length. Notably, discrepancies between the model and the literature suggested an important role for RSL2 in regulating RSL4. In the future, the net designed in the current study could be used as a platform to develop hypotheses about the interaction between RSL2 and RSL4. © 2025 by SCITEPRESS– Science and Technology Publications, Lda.

关键词： Plant diseases

来源：评论

学校读者我要写书评

暂无评论

Thermal Model of a Soldering Iron 33rd

Thermal Model of a Soldering Iron

引用

33rd international conference on Organization and Technology of Maintenance, OTO 2024

作者： Barić, Tomislav Glavaš, Hrvoje Dubravac, Anto Faculty of Electrical Engineering Computer Science and Information Technology Osijek University of Osijek Osijek Croatia

ISBN: (纸本)9783031805967

Soldering irons are a hand tool that is indispensable in the process of making small series of electronic devices. Soldering irons have evolved from very simple devices without temperature control to devices with complex temperature control. The implementation of temperature control is based on the knowledge of the thermal models of the soldering iron. Thermal models of soldering irons are based either on the theory of thermal fields or on the theory of equivalent Kirchhoff thermal circuits. The theory of thermal fields is applied for very accurate modeling. In doing so, the finite element method (FEM) is used. For the above, it is necessary to use software packages based on FEM. Unlike FEM-based modeling, thermal circuit modeling does not require specialized software tools. It is also possible to derive analytical expressions that describe the thermal process of the soldering iron. In this paper, a thermal model of a soldering iron based on equivalent Kirchhoff thermal circuits is presented. Analytical expressions were derived to describe the thermal transient. The validity of the theoretical model is supported by measurement. measurements were carried out on two soldering irons from different manufacturers. The measurement results were analyzed. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Hand tools

来源：评论

学校读者我要写书评

暂无评论

Applying choice preference to passenger flow guidance for urban rail transit under emergencies 4

Applying choice preference to passenger flow guidance for ur...

引用

2024 4th international conference on Intelligent Traffic systems and Smart City, ITSSC 2024

作者： Xu, Ran Xiao, Hongbing School of Computer and Artificial Intelligence Beijing Technology and Business University Beijing China

ISBN: (纸本)9781510686304

Under emergencies, reasonably guiding passenger flow can improve the transportation efficiency and minimize the impact of the accident on urban traffic operation. First of all, based on the psychological theory and the relevant information such as the choice preference of passengers, the passengers are classified to get the sensitivity difference of different potential mode passengers on the scheme attributes, which provides data support for path selection modeling and optimization. Secondly, the model with time index is established by using the data of the train and the passengers, and the model with comfort index is constructed by using the cubic polynomial fitting method. According to the utility maximization problem theory, the objective function including time and comfort index is constructed to provide the optimal path for different types of passengers. Finally, a case study of partial rail transit lines in Beijing is presented. The results show that, in the case of emergency, by analyzing the behavior preference of passenger's path selection, the passengers can be classified, and a more suitable route can be provided for each type of passengers, which can improve the time utilization ratio, and passengers' perception of the train's comfort. © 2025 SPIE.

关键词： Urban transportation

来源：评论

学校读者我要写书评

暂无评论

Enhancing the Efficiency of the Grouping-Scoring-modeling Framework with Statistical Pre-Scoring Component for Transcriptomic Data Analysis

Enhancing the Efficiency of the Grouping-Scoring-Modeling Fr...

引用

18th international joint conference on Biomedical Engineering systems and Technologies, BIOSTEC 2025

作者： Khokhar, Maham Bakir-Gungor, Burcu Yousef, Malik Department of Data Science Social Sciences Institute Abdullah Gul University Kayseri38080 Turkey Department of Computer Engineering Faculty of Engineering Abdullah Gul University Kayseri38080 Turkey Department of Information Systems Galilee Digital Health Research Center Zefat Academic College Zefat13206 Israel

The advent of high-throughput transcriptomic technologies has generated vast transcriptomic datasets, challenging current analytical methodologies with their sheer volume and complexity. The Grouping-Scoring modeling (G-S-M) approach is one of the recent approaches that treat groups of genes (or clusters of genes) by embedding prior biological knowledge with machine learning in order to detect the most significant groups for classification tasks. The G-S-M might need to treat thousand ten thousand of groups (scoring those groups) which might affect the speed and performance of the algorithm. In response, this study introduces the Pre Scoring G-S-M model, an enhancement of the established Grouping-Scoring-modeling (G-S-M) framework. This approach incorporates a Pre-Scoring component that leverages the Limma package for its empirical Bayes methods to optimize initial transcriptomic data evaluation through a percentage-based selection of statistically significant gene groups. Aimed at reducing computational demand and streamlining feature selection, the model also addresses data redundancy by eliminating duplicate gene-disease associations. Application to nine human gene expression datasets from the GEO database showed promising results. It demonstrated improvements in computational efficiency and analytical precision while reducing the number of features selected per dataset compared to the traditional G-S-M approach, without compromising accuracy. These initial findings highlight the Pre-Scoring G-S-M model's potential to enhance transcriptomic data analysis, indicating a promising direction for future bioinformatics research. © 2025 by SCITEPRESS– Science and Technology Publications, Lda.

关键词： Data accuracy

来源：评论

学校读者我要写书评

暂无评论

5th Polish Congress of Mechanics and 25th international conference on computer Methods in Mechanics, PCM-CMM 2023

5th Polish Congress of Mechanics and 25th International Conf...

引用

5th Polish Congress of Mechanics and 25th international conference on computer Methods in Mechanics, PCM-CMM 2023

ISBN: (纸本)9783031731600

The proceedings contain 18 papers. The special focus in this conference is on Mechanics and computer Methods in Mechanics. The topics include: Inspection of 2D Composite Structures Using Self-Heating-Based Vibrothermography;selected Aspects of Validation of Numerical Models of Bridge Structures in Terms of Dynamic Technical Diagnostics;influence of Lighting Column Wall Thickness on Passive Safety Coefficient During Car Crash;contact Phenomena of Soft Polymers – Insights from Experiments and Simulations;jaya Algorithm for Optimization of 2D Reinforced Concrete Frame Structure;specific Strength and Modulus of Epoxy Composites with Different Reinforcing Materials;modelling the Cooperation of Gravity Energy Storage with a Renewable Energy Source;elastic Force Sensor Based on Velostat® Characteristics Investigation;numerical modeling of Tissue Laser Irradiation Using the Finite Pointset Method;the Impact of Multilayer Composite Materials with a Duroplastic Matrix at Diversified Temperature Conditions;the Implementation of Biomimetic Structural Optimization Software in a Supercomputing Environment;design of Electric Crawler Platform;Development of Numerical Model to Simulate PM-FBG Response to Propagating Guided Waves;friction and Stick-Slip of Soft Materials – Challenge for measurement and Prediction;Hybrid PZT-FBG Sensing for Damage Detection in Structural Health Monitoring;numerical Analysis of Shock Wave Impact on a Gas Cylinder.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Sequence Generator Network for Neuromechanical Control of Rat Hindlimbs 13th

Sequence Generator Network for Neuromechanical Control of Ra...

引用

13th international conference on Biomimetic and Biohybrid systems, Living Machines 2024

作者： Jackson, Clayton B. Nourse, William R. P. Quinn, Roger D. Department of Mechanical and Aerospace Engineering Case Western Reserve University ClevelandOH44106-7222 United States Department of Electrical Computer and Systems Engineering Case Western Reserve University ClevelandOH44106-7222 United States

ISBN: (纸本)9783031725968

Mammalian locomotion is a complex behavior arising from interaction between neural and biomechanical systems, driven by rhythmic activity originating in the spinal cord. Although it has been extensively studied, the structure of the circuits that produce this behavior remains unknown. One approach to modeling the rhythmic activity is with half-center models, in which there are alternating periods of flexion and extension to coordinate muscle activity. While this approach is sufficient for simple antagonistic muscle pairs, it can be difficult to expand the controller for more complex models with muscle synergies. This work introduces a method of modeling the activity in the spinal cord with a population of neurons exhibiting a continuous cycle of activity, rather than the push-pull of half-centers. To evaluate the effectiveness of this neural model for locomotive behavior, we integrate it with a biomechanical simulation to control the muscle activity in a pair of rat hindlimbs. With this controller, a pair of simulated rat hindlimbs is able to walk on the ground with joint trajectories exhibiting similar features to the animal during locomotion. This model of the spinal cord activity shows promising results on a simple model and demonstrates the ability to be adapted to control more complex biomechanical models with muscle synergies. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Rats

来源：评论

学校读者我要写书评

暂无评论

27th international conference on Distributed computer and Communication Networks, DCCN 2024

27th International Conference on Distributed Computer and Co...

引用

27th international conference on Distributed computer and Communication Networks, DCCN 2024

ISBN: (纸本)9783031808524

The proceedings contain 36 papers. The special focus in this conference is on Distributed computer and Communication Networks. The topics include: Radio Resources Management Model of 5G Network with Two NSIs and Priority Service;energy-Efficient Framework for Task Caching and Computation Offloading in Multi-tier Vehicular Edge-Cloud systems;autoregressive and Arima Pro-integrated Moving Average Models for Network Traffic Forecasting;stability Conditions of Two-Class Preemptive Priority Retrial System with Constant Retrial Rate;on Physical Proximity Serverless Presentations;measurement-Based Received Signal Time-Series Generation for 6G Terahertz Cellular systems;optimizing Energy Efficiency via Small Cell-Controlled Power Management for Seamless Data Connectivity;analysing Performance Metrics of an All-Optical Network in Fault Conditions and Traffic Surges;analysis of Polling Queueing System with Two Buffers and Varying Service Rate;simulation of M/G/1//N System with Collisions, Unreliable Primary and a Backup Server;state-Dependent Admission Control in Heterogeneous Queueing-Inventory System with Constant Retrial Rate;stochastic Analysis of a Multi-server Production Inventory System with N-Policy;simulation-Based Optimization for Resource Allocation Problem in Finite-Source Queue with Heterogeneous Repair Facility;tandem Retrial Queueing System with Markovian Arrival Process and Common Orbit;Polling Model for Analysis of Round-Trip Time in the IAB Network;reliability Analysis of a k-out-of-n Single Server System Extending Service to External Customers Under N-Policy and Server Vacations;reliability Analysis of a Double Hot Standby System Using Marked Markov Processes;modeling Distributions of Node Characteristics in Directed Graphs Evolving by Preferential Attachment;convolution Algorithm for Evaluation of Probabilistic Characteristics of Resource Loss systems with Signals;Controlled Markov Queueing systems Under Uncertainty with Deep RL Algorithm;probability Chara

关键词：

来源：评论

学校读者我要写书评

暂无评论

21st international computer measurement Group conference, CMG 1995

21st International Computer Measurement Group Conference, CM...

引用

21st international computer measurement Group conference, CMG 1995

The proceedings contain 124 papers. The topics discussed include: a resource occupancy model for evaluating instrumentation system overheads;capacity planning for tape drives: learning to count;DASD subsystems: evaluating their performance and characteristics through benchmarking;generating representative synthetic workloads: an unsolved problem;introduction to simple network management protocol (SNMP);performance modeling of large transients in computer systems;the structure and evolution of a distributed measurement framework;a federation-oriented capacity management methodology for LAN environments;a performance modeling tool for a client/server backup product;alarm-based vs. historical trending performance management or really large UNIX installation performance management;and capacity planning skills migration from mainframe to client/server.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：