Bluetooth Positioning
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This document discusses Bluetooth positioning and the challenges involved. It introduces Bluetooth, noting its frequency range and device classes with different ranges. It explores using received signal strength indication (RSSI) values to calculate distance, but notes RSSI can vary between devices and be unstable even for one device. Platform and language challenges are discussed, with Android chosen. Architectures and class diagrams are included, along with references.
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This document provides an overview of graph theory, including its history and key concepts. It defines a graph as a set of nodes connected by edges. Important early contributors are noted, such as Euler's work on the Seven Bridges of Königsberg problem. Exact definitions of graph types like simple, directed, and weighted graphs are given. Key graph concepts explained in less than three sentences include connectivity, degree, paths, cycles, and trees. The document also briefly discusses representing graphs through adjacency lists and matrices. It concludes by thanking the reader and listing references.
Fuzzy Set
This document introduces fuzzy sets. It defines a fuzzy set as a set where elements have gradual membership rather than binary membership. Fuzzy sets allow membership values between 0 and 1. Operations on fuzzy sets like union, intersection, and complement are defined. An example fuzzy set distinguishes young and adult ages on a scale rather than a binary classification. Fuzzy sets permit ambiguous or uncertain boundaries unlike classical sets.
Spatial Transformation
This document discusses different types of geometric transformations including linear transformations, affine transformations, and projective transformations. Linear transformations allow for scaling, rotation, reflection, and shearing using a 2x2 matrix. Affine transformations preserve parallel lines and proportional distances but not lengths and angles. Projective transformations describe how objects appear rather than how they are, distorting lengths, angles, and parallelism. Both affine and projective transformations are important applications in computer graphics and robot recognition.
Introduction to GIS
This document provides an introduction to geographic information systems (GIS). It defines GIS as a computer system for capturing, storing, analyzing and displaying spatially-referenced data. A GIS integrates database operations with maps in digital form and allows users to create interactive queries, analyze spatial information, edit maps and present results. The document outlines key components of a GIS including data, databases, processing capabilities, hardware and communications. It also discusses the importance of location in problem-solving and decision making as well as the history and business applications of GIS technology.
DTM Quality Assessment
The document discusses quality assurance standards and guidelines for geospatial data from the American Society for Photogrammetry and Remote Sensing (ASPRS), the National Standard for Spatial Data Accuracy (NSSDA), and the Federal Emergency Management Agency (FEMA). It states that the data was tested and complied with alternative accuracy thresholds, meeting standards for horizontal and vertical root mean square error based on checkpoints across various land cover types. Overall, the summary provides an overview of quantitative accuracy metrics and assurance testing performed on geospatial data to ensure it satisfies various standards and can be considered high quality.
Introduction to SQL
This document provides an introduction to SQL and relational database concepts. It explains that SQL is used to manipulate and retrieve data from relational databases. It also outlines the main SQL commands: DDL for data definition, DML for data manipulation, DCL for data control, and DQL for data queries. Key relational database concepts like tables, records, columns, and relationships are defined. Constraints, data types and integrity are discussed. Examples are provided for SQL statements like CREATE, INSERT, UPDATE, DELETE, and SELECT.
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Adaptive synchronous sliding control for a robot manipulator based on neural ...
Robot manipulators have become important equipment in production lines, medical fields, and transportation. Improving the quality of trajectory tracking for
robot hands is always an attractive topic in the research community. This is a
challenging problem because robot manipulators are complex nonlinear systems
and are often subject to fluctuations in loads and external disturbances. This
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Hierarchical Digital Twin of a Naval Power System
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
CHINA’S GEO-ECONOMIC OUTREACH IN CENTRAL ASIAN COUNTRIES AND FUTURE PROSPECT
The rivalry between prominent international actors for dominance over Central Asia's hydrocarbon
reserves and the ancient silk trade route, along with China's diplomatic endeavours in the area, has been
referred to as the "New Great Game." This research centres on the power struggle, considering
geopolitical, geostrategic, and geoeconomic variables. Topics including trade, political hegemony, oil
politics, and conventional and nontraditional security are all explored and explained by the researcher.
Using Mackinder's Heartland, Spykman Rimland, and Hegemonic Stability theories, examines China's role
in Central Asia. This study adheres to the empirical epistemological method and has taken care of
objectivity. This study analyze primary and secondary research documents critically to elaborate role of
china’s geo economic outreach in central Asian countries and its future prospect. China is thriving in trade,
pipeline politics, and winning states, according to this study, thanks to important instruments like the
Shanghai Cooperation Organisation and the Belt and Road Economic Initiative. According to this study,
China is seeing significant success in commerce, pipeline politics, and gaining influence on other
governments. This success may be attributed to the effective utilisation of key tools such as the Shanghai
Cooperation Organisation and the Belt and Road Economic Initiative.
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Bigdata of technology
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DfMAy 2024 - key insights and contributions
We have compiled the most important slides from each speaker's presentation. This year’s compilation, available for free, captures the key insights and contributions shared during the DfMAy 2024 conference.
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Bluetooth Positioning
- 2. Introduction open platform specification for a radio frequency communication protocol for wireless devices. 2400 - 2483.5 MHz frequency range There are three classes of Bluetooth devices: Class 1 :33 m Class 2 :10 m Class 3 :3 m
- 7. Challenges – distance calculation from rssi Theoretical Relation Between Distance and RSSI: 1- 2-
- 8. Challenges – distance calculation from rssi Depends on device… Unstable for 1 device… Better result after pairing… -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 0 1 2 3 4 5 6 7 8 9 10 Bluetooth Distance/RSSI Xperia TX Nokia6270
- 9. Challenges – Platform & Language 1- Windows Platform Problem (HCI layer) 2- Linux need to install bluz package using command: Sudo apt-get install bluz Language Test (.Net (32feet), Java (bluecove), android) We choose android!!!
- 11. Class diagram
- 12. References Atlantis: Location Based Services with Bluetooth, Jason Yipin Ye , Department of Computer Science, Brown University The Official Bluetooth Membership site: https://www.Bluetooth.org http://www.stackoverflow.com/questions/13705647/fin ding-distance-from-rssi-value-of-bluetooth-low- energy-enabled-device http://www.codeproject.com/Articles/783073/A- Simple-Android-SQLite-Example http://www.mkyong.com/android/android-activity- from-one-screen-to-another-screen/
- 13. thanks…