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A cognitive-based routing algorithm for crowd dynamics under incomplete or even incorrect map knowledge

INTELLIGENZA ARTIFICIALE 2023年第1期17卷 103-129页

作者： Yu, Bin Dong, Zhihui Liu, Hu Ye, Jianhong Wang, Daoge Tongji Univ Key Lab Rd & Traff Engn Minist Educ Shanghai Peoples R China Inner Mongolia Traff Design & Res Inst Co Ltd Hohhot Inner Mongolia Peoples R China Shanghai Inst Technol Sch Rail Transportat Shanghai Peoples R China Jiangsu Univ Sch Automot & Traff Engn Zhenjiang Peoples R China

A cognitive-based routing algorithm is proposed. Concepts like local form and path algorithms are developed. Unlike current mainstream routing algorithms assume that all people know everything about the environment, the proposed algorithm allows people to have a complete or incomplete map knowledge and built up their own map knowledge in a piecemeal fashion. Using a hospital floor plan as the scenario, numerical experiments are conducted by assuming pedestrians to have different levels of map knowledge. Results show that reasonable routes could be frequently found even if pedestrians only have an incomplete knowledge of the network. Also pedestrians generally need to traverse more rooms if having zero or less map knowledge. Hence the proposed algorithm's effectiveness is validated to some extent.

关键词： Cognitive science computer algorithm crowd dynamics path finding routing

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Theory and Evaluation of a Stability Condition for Second Order Repetitive Control

Theory and Evaluation of a Stability Condition for Second Or...

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AIAA Science and Technology Forum and Exposition (AIAA SciTech)

作者： Cui, Peiling Ismail, Ayman F. Longman, Richard W. Liu, Zhiyuan Xu, Han Beihang Univ Sch Instrumentat & Optoelect Engn Beijing 100191 Peoples R China Columbia Univ Dept Mech Engn New York NY 10027 USA Columbia Univ Mech Engn New York NY 10027 USA Beihang Univ Beijing 100191 Peoples R China

ISBN: (数字)9781624105951

ISBN: (纸本)9781624105951

Repetitive Control (RC) is a control method for tracking a periodic command or eliminating a periodic disturbance to a control system, aiming for zero tracking error in each case. Applications in spacecraft address jitter from internal moving parts such as reaction wheels, control moment gyros, a momentum wheel, or a cryo pump. RC requires knowledge of the reference or disturbance period. RC performance suffers if the period fluctuates or is not precisely known. Second order RC (SORC) offers less sensitivity to accurate period knowledge, but stability analysis is difficult because of the high order governing difference equations. Sufficient stability conditions can be helpful in the design process. This paper presents a derivation of a sufficient condition, developed based on a partial fraction expansion, that makes SORC only require data from one period back. This can significantly reduce the memory requirements. This approach was originally developed in a companion paper treating magnetically suspended rotors, and used an unusual block diagram configuration. This approach is developed here for the standard block diagram structure for RC. It is then compared to the true stability boundary and to different sufficient conditions developed by the third author and coworkers. Which sufficient condition is closest to the true stability boundary is established for different situations. The designer may find it beneficial to examine multiple conditions.

关键词： Closed Loop Transfer Function Attitude Control System Control Systems Reaction Wheels Feedback Control System computer algorithm FIR Filters Stewart Platform Robots Robotics Research Corporation

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Application of Blockchain within Aviation Cybersecurity Framework

Application of Blockchain within Aviation Cybersecurity Fram...

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AIAA Aviation Forum

作者： Adhikaril, Sam Davis, Chris Sysoft Operat & Res New York NY 10007 USA Sysoft AI & Data Sci New York NY 10007 USA

ISBN: (数字)9781624105982

ISBN: (纸本)9781624105982

As manufacturing, operations and maintenance become increasingly complex in the aviation sector, a digital transformation is underway toward Blockchain technology, an open source digital architecture for related data and their histories. From maintenance, repair and overhaul to protection against global positioning system spoofing, Blockchain technology is making a major impact in aviation industry. This paper analyzes possible implementation of Blockchain technology within the realm of Aviation Cybersecurity Framework.

关键词： Aviation Global Positioning System Communications, Navigation, Surveillance Information Technology Data Science computer algorithm Aviation Safety Aircraft Systems Aircraft Part GPS Satellites

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Modified Merge Sort algorithm for Large Scale Data Sets

Modified Merge Sort Algorithm for Large Scale Data Sets

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12th International Conference on Artificial Intelligence and Soft Computing, ICAISC 2013

作者： Wozniak, Marcin Marszalek, Zbigniew Gabryel, Marcin Nowicki, Robert K. Silesian Tech Univ Inst Math Ul Kaszubska 23 PL-44100 Gliwice Poland Czestochowa Tech Univ Inst Computat Intelligence PL-42200 Czestochowa Poland

ISBN: (纸本)9783642386091

Sorting algorithms find their application in many fields. One of their main uses is to organize databases. Classical applications of sorting algorithms often can not cope satisfactorily with large data sets or with unfavorable poses of sorted strings. Typically, in such situations, we try to use other methods or apply sorting process to reshuffled input data. Unfortunately, this approach complicates sorting process and often results in significant prolongation of the time. In this paper, the authors examined an algorithm dedicated to the problem of sorting large scale data sets. In the literature, there are no studies of such examples. These studies will allow to describe the properties of sorting methods for large scale data sets. Performed tests have shown superior performance of the examined algorithm, especially for large scale data sets. Changes sped up sorting of data with any arrangement of the input elements.

关键词： computer algorithm data mining data sorting analysis of computer algorithms

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一种预测单链RNA分子二级结构的计算机算法

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中国生物化学与分子生物学报 1985年第2期 81-85+87页

作者：何东明,陈农安中国科学院上海生物化学研究所中国科学院上海生物化学研究所上海上海

本文给出了一个利用已知能量数据构成具有最小自由能的单链RNA分子二级结构的计算机算法,并给出了此算法的可行性证明和应用实例。

关键词： RNA Structure computer algorithm

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HIGH RESOLUTION INLINE DETECTION OF CHANGES IN THE CONDUCTION TYPE OF MULTICRYSTALLINE SILICON BY CONTACT LESS PHOTOCONDUCTIVITY MEASUREMENTS

HIGH RESOLUTION INLINE DETECTION OF CHANGES IN THE CONDUCTIO...

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35th IEEE Photovoltaic Specialists Conference

作者： Schueler, N. Mittelstrass, D. Dornich, K. Niklas, J. R. Freiberg Instruments GmbH D-09599 Freiberg Germany

ISBN: (纸本)9781424458912

Changes in the conduction type of a multicrystalline brick can occur, since a high phosphorus concentration is typical for the low quality feedstock that is usually used in PV industry. The inline detection of these changes is made possible via photoconductivity measurements. The measured photoconductivity depends strongly on the resistivity of the sample. With a developed computer algorithm the sharp raises of the photoconductivity at pn-changes can be detected in bricks. With these measurements it is possible to detect pn-changes with a one mm resolution as early as possible in the production process.

关键词： computer algorithm contact less photoconductivity measurements elemental semiconductors high resolution inline detection multicrystalline silicon p-n junction p-n junctions photoconductivity photovoltaic cells photovoltaic industry silicon

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Research on Control algorithm Theory and Visual Recognition algorithm of Network Devices 6

Research on Control Algorithm Theory and Visual Recognition ...

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2023 IEEE 6th International Conference on Information Systems and computer Aided Education, ICISCAE 2023

作者： Zhang, Lingyun Tianjin University of Technology Tianjin China

ISBN: (纸本)9798350313444

Our society's production and living practices have undergone a significant change as a result of the quick advancement of computer science and technology and their ever-expanding uses. algorithms for network graph computation have emerged as a key resource for handling the increasing volume of web data. This is especially important when dealing with large amounts of network data, including data from social media, the Internet and the Internet of Things. By combining the theory of control algorithms with network graph computation algorithms, it provides a strong support for building smarter and more efficient automated systems as well as more reliable network infrastructures. The main content of this paper will focus on the control algorithm theory and network graph computing algorithm to briefly explain and analyze, and based on artificial intelligence algorithms for visual identification of network equipment in computer labs, mainly for computer lab operation and maintenance situation for supervision and equipment identification. When the laboratory equipment terminal fails, the server side of the system can obtain the current operating condition of the equipment terminal, collect the interface image information of the current equipment terminal through the server-side data acquisition system, carry out intelligent identification of the acquired data information. The paper will also delve into the analysis and processing of identification results. It will detail how these results can be effectively processed and interpreted. Additionally, it will discuss methods of analyzing the results and potential solutions to market to end users. Ultimately, the paper aims to provide users with reasonable and feasible solutions to equipment anomalies. The recognition algorithm has high timeliness and short response time, which basically meets the daily operation and maintenance needs of the laboratory, and provides solutions to the user's problem solving, aiming to provide valu

关键词： artificial intelligence computer algorithm control algorithm theory network graph visual recognition

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Discovering visual-concepts of online images from associational image patches

Discovering visual-concepts of online images from associatio...

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IEEE International Symposium on Consumer Electronics

作者： Chian, Ya-Shin Teng, Wei-Guang Department of Engineering Science National Cheng Kung University Tainan Taiwan

ISBN: (纸本)9781612848433

With the advance of networking technologies, the widespread use of handheld devices not only enables instant access of required information but also shortens the distance among acquaintances. Nowadays one can easily share their photos on the Internet right after the photos are taken. With an increasing amount of images, a challenging problem for computer algorithms is to discover the visual-concept embedded within an image. Instead of modeling this problem as a classification process which attempts to categorize images into different pre-defined classes, we propose in this work to start with identifying similar image patches. Specifically, we adopt the technique of mining association rules to construct evident relationships among image patches so as to discover identical visual-concepts from online images. © 2011 IEEE.

关键词： Association rules computer vision Feature extraction Image retrieval Internet Internet Internet Itemsets Visualization association rules mining associational image patch classification process computer algorithm data mining embedded systems handheld device image classification image matching images categorization information access mobile computing networking technology online image visual concept

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Research on the application of computer in drug design

Research on the application of computer in drug design

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作者： Peiyang Shi Suzhou High School of Jiangsu Province

Virtual screening by computer is of great scientific significance for drug research and *** recent years,a large number of computer simulation methods have been developed and applied to drug development for a variety of *** paper summarized and prospected the application progress of computer aided drug design(CADD) in the research and development of new drugs,focusing on the working principle of CADD,related algorithms,and the advantages and disadvantages of existing *** CADD has been successfully applied to a number of drug development projects,the accuracy of auxiliary drug structure optimization is still not ***,it is urgent to develop more accurate and efficient CADD models and algorithms to promote the process of new drug discovery.

关键词： computer aided drug design new drug research and development computer algorithm virtual simulation drug screening

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Quantitative Microautoradiography

Quantitative Microautoradiography

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作者： Subrahmonia, Jayashree Drexel University

学位级别：M.S., Master of Science/Master of Surgery

Since its development as a practical procedure, autoradiography has proved to be one of the most powerful analytic techniques in cell biology. One of its principal advantages is that it can be used to obtain quantitative as well as qualitative data, since under standardized conditions the amount of radioactivity in the tissue is directly related to the number of silver grains in the overlying emulsion. In order to do this, it is necessary to directly count or otherwise estimate the relative density of grains in different regions of the autoradiograms. As visual counting of silver grains is usually slow and always tedious, one does need semi-automated or even fully automated systems for estimating the silver grain *** this thesis, we have addressed the problem of developing an automated system for estimating the grain count over specific areas outlined by the user on the image. We have developed two methodsMethod 1:1) We have developed a computer algorithm for evaluating the area fraction of the grains and the mean and rms of the grey value over measuring windows placed by the user on the image and have used these parameters as estimates of the grain count.2) We have made a comparitive study of the performance of this algorithm for different combinations of optics and magnification to determine the combination of optics and magnification that gives the best estimate of the grain *** 2:1) We have developed a statistical model for the grey level distribution, due to the grains over an area on the image.2) We have used a nonlinear optimization technique to estimate the parameters of the distribution and have used these parameters to estimate the grain count.

关键词： Autoradiography Analytic techniques computer algorithm Magnification

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