6 research outputs found
Modeling and Simulation in Engineering
This book provides an open platform to establish and share knowledge developed by scholars, scientists, and engineers from all over the world, about various applications of the modeling and simulation in the design process of products, in various engineering fields. The book consists of 12 chapters arranged in two sections (3D Modeling and Virtual Prototyping), reflecting the multidimensionality of applications related to modeling and simulation. Some of the most recent modeling and simulation techniques, as well as some of the most accurate and sophisticated software in treating complex systems, are applied. All the original contributions in this book are jointed by the basic principle of a successful modeling and simulation process: as complex as necessary, and as simple as possible. The idea is to manipulate the simplifying assumptions in a way that reduces the complexity of the model (in order to make a real-time simulation), but without altering the precision of the results
A Survey of Computer Vision Methods for 2D Object Detection from Unmanned Aerial Vehicles
The spread of Unmanned Aerial Vehicles (UAVs) in the last decade revolutionized many applications fields. Most investigated research topics focus on increasing autonomy during operational campaigns, environmental monitoring, surveillance, maps, and labeling. To achieve such complex goals, a high-level module is exploited to build semantic knowledge leveraging the outputs of the low-level module that takes data acquired from multiple sensors and extracts information concerning what is sensed. All in all, the detection of the objects is undoubtedly the most important low-level task, and the most employed sensors to accomplish it are by far RGB cameras due to costs, dimensions, and the wide literature on RGB-based object detection. This survey presents recent advancements in 2D object detection for the case of UAVs, focusing on the differences, strategies, and trade-offs between the generic problem of object detection, and the adaptation of such solutions for operations of the UAV. Moreover, a new taxonomy that considers different heights intervals and driven by the methodological approaches introduced by the works in the state of the art instead of hardware, physical and/or technological constraints is proposed
文節の係り受け関係を用いた観点に基づく意見クラスタリング
Web上には,様々なトピックに関する意見が存在し,トピックに関する意見には様々な観点のものが混在している.例えば,「原発」というトピックに関する意見には安全性やエネルギー,健康といった観点の意見が混在している.意見をこのような観点ごとに分類することで,観点ごとに意見を容易に把握・比較でき,新たな観点の意見を発見する手がかりにもなる.意見を観点ごとに分類する研究は少なく,分類する観点を予め設定しているものや,観点の差異を考慮していない手法がほとんどである.そこで本研究では,予め観点を設定せずに,文脈情報,とりわけ名詞と動詞の係り受け関係を考慮して意見集合に適した観点を自動的に特定・分類するクラスタリング手法を提案する.本研究で提案する意見クラスタリング手法では,「意見の観点の違いは名詞と動詞の係り受け関係の違いに反映される」という仮定のもと,文節の係り受け関係から名詞Nと動詞Vのペア〈N,V〉を抽出し,これをクラスタリングに利用する.具体的には,各意見から得られた文節の係り受け関係をもとに名詞とそれが係る動詞のペア〈N,V〉を抽出する.そして,日本語WordNetと潜在意味インデキシングを用いて計算した名詞Nどうしの類似度と動詞Vどうしの類似度から抽出した〈N,V〉間の類似度を計算するが,特に,名詞Nどうしの類似度が高くなるほど動詞Vどうしの類似度が〈N,V〉間の類似度に大きく影響を与えるように計算する.最終的に意見どうしの類似度を〈N,V〉間の類似度から計算し,Ward法による階層型クラスタリングを行う.評価実験では,意見集合に対して人手による観点に基づいた分類と提案手法および従来のクラスタリング手法による分類がどの程度近いかということを指標として分類性能を調べた.実験の結果,提案手法では従来手法より高い分類性能となり,提案手法が有用であることが示された.電気通信大学201
Proceedings of the 2004 ONR Decision-Support Workshop Series: Interoperability
In August of 1998 the Collaborative Agent Design Research Center (CADRC) of the California Polytechnic State University in San Luis Obispo (Cal Poly), approached Dr. Phillip Abraham of the Office of Naval Research (ONR) with the proposal for an annual workshop focusing on emerging concepts in decision-support systems for military applications. The proposal was considered timely by the ONR Logistics Program Office for at least two reasons. First, rapid advances in information systems technology over the past decade had produced distributed collaborative computer-assistance capabilities with profound potential for providing meaningful support to military decision makers. Indeed, some systems based on these new capabilities such as the Integrated Marine Multi-Agent Command and Control System (IMMACCS) and the Integrated Computerized Deployment System (ICODES) had already reached the field-testing and final product stages, respectively.
Second, over the past two decades the US Navy and Marine Corps had been increasingly challenged by missions demanding the rapid deployment of forces into hostile or devastate dterritories with minimum or non-existent indigenous support capabilities. Under these conditions Marine Corps forces had to rely mostly, if not entirely, on sea-based support and sustainment operations. Particularly today, operational strategies such as Operational Maneuver From The Sea (OMFTS) and Sea To Objective Maneuver (STOM) are very much in need of intelligent, near real-time and adaptive decision-support tools to assist military commanders and their staff under conditions of rapid change and overwhelming data loads.
In the light of these developments the Logistics Program Office of ONR considered it timely to provide an annual forum for the interchange of ideas, needs and concepts that would address the decision-support requirements and opportunities in combined Navy and Marine Corps sea-based warfare and humanitarian relief operations. The first ONR Workshop was held April 20-22, 1999 at the Embassy Suites Hotel in San Luis Obispo, California. It focused on advances in technology with particular emphasis on an emerging family of powerful computer-based tools, and concluded that the most able members of this family of tools appear to be computer-based agents that are capable of communicating within a virtual environment of the real world. From 2001 onward the venue of the Workshop moved from the West Coast to Washington, and in 2003 the sponsorship was taken over by ONR’s Littoral Combat/Power Projection (FNC) Program Office (Program Manager: Mr. Barry Blumenthal). Themes and keynote speakers of past Workshops have included:
1999: ‘Collaborative Decision Making Tools’ Vadm Jerry Tuttle (USN Ret.); LtGen Paul Van Riper (USMC Ret.);Radm Leland Kollmorgen (USN Ret.); and, Dr. Gary Klein (KleinAssociates)
2000: ‘The Human-Computer Partnership in Decision-Support’ Dr. Ronald DeMarco (Associate Technical Director, ONR); Radm CharlesMunns; Col Robert Schmidle; and, Col Ray Cole (USMC Ret.)
2001: ‘Continuing the Revolution in Military Affairs’ Mr. Andrew Marshall (Director, Office of Net Assessment, OSD); and,Radm Jay M. Cohen (Chief of Naval Research, ONR)
2002: ‘Transformation ... ’ Vadm Jerry Tuttle (USN Ret.); and, Steve Cooper (CIO, Office ofHomeland Security)
2003: ‘Developing the New Infostructure’ Richard P. Lee (Assistant Deputy Under Secretary, OSD); and, MichaelO’Neil (Boeing)
2004: ‘Interoperability’ MajGen Bradley M. Lott (USMC), Deputy Commanding General, Marine Corps Combat Development Command; Donald Diggs, Director, C2 Policy, OASD (NII