The goal of this thesis is to develop an interactive computer system for Man-In-The-Loop Naval Gunfire Support (NGFS) training. In attaining this goal, it provides the end user with the full range of exercises a ship ...
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The goal of this thesis is to develop an interactive computer system for Man-In-The-Loop Naval Gunfire Support (NGFS) training. In attaining this goal, it provides the end user with the full range of exercises a ship sees at the NGFS ranges. The emphasis is on coordinated teamwork to facilitate a seamless transition from the training (non-firing) environment to live- round firings. The benefits are three-fold. First, a more cohesive primary team will be developed. Second, the declining DoD budget demands that fewer training rounds are expended and that the training and maintenance budget be reduced. Finally, a more efficient use of range time will result from better shipboard teamwork. The NGFS training model encompasses the five testable scenarios from COMNAVSURFLANTINST 3570.2D (Gunsmoke) and incorporates the appropriate mix of point, area, and counter-battery fire. A built-in umpiring capability impartially monitors time-line events and awards the appropriate points and penalties. A training report is generated to document the exercise and compare results to historical performance. A statistical analysis of improvements by milestones in mission vs. the norm is done to emphasize areas in critical need for improvement.
Transportation resource planning and implementation within a theater of operations have always been challenging for logisticians. This was especially true during Operation Desert Storm, where new lessons were learned ...
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Transportation resource planning and implementation within a theater of operations have always been challenging for logisticians. This was especially true during Operation Desert Storm, where new lessons were learned because of a scenario different than any other experienced. What was needed was a transportation asset-focused model that would allow logisticians to plan more effectively for current and future transportation system requirements. The focus of this thesis is the development of the Intra-Theater Transportation System Simulation (ITTSS). ITTSS is an object-oriented simulation model, which was developed to simulate a complete transportation system where units consume supplies, supply points resupply, and assets deliver the supplies. ITTSS can also be used to schedule specific missions of moving cargo from one location to another. Both modes can be run separately or together. A variety of input parameters concerning supply points, motorpools, maintenance facilities, fuelpoints, convoys and the operations performed can be adjusted to fit any specific scenario. The measures of performance produced by the model include the daily amount of cargo moved, time required to move cargo to a certain location, and the availability and utilization rates of vehicles. ITTSS is designed to run on a personal computer, using the PC-OS/2 version of MODSIM n, the OS/2 1.2 operating system, and Microsoft C 5.0.
The Antisubmarine Warfare System Evaluation Tool (ASSET) is a generic high-level antisubmarine warfare (ASW) modeling tool, designed to aid ASW personnel in the development and refinement of ASW top-level warfare requ...
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The Antisubmarine Warfare System Evaluation Tool (ASSET) is a generic high-level antisubmarine warfare (ASW) modeling tool, designed to aid ASW personnel in the development and refinement of ASW top-level warfare requirements and the ASW Master Plan. The primary objective of this thesis is to analyze and implement the improvements suggested in previous evaluations of various sub-areas of ASSET. The glimpse rate model for submarine detection used in ASSET has been substituted with compound Lambda-Sigma jump model. There is a different target radiated frequency in each environmental region. Each target will have its own detection rate to reflect the differences in its operating characteristics. Multiple engagements between platforms are used to eliminate the limitations of interaction between opponent platforms. The glimpse rate model is used to determine detection opportunities of maritime patrol aircraft (MPA) and to approximate a continuous-looking sensor pattern. A different criterion of selecting search probability area (SPA) and MPA pairs using the ratio of MPA's time on-station over the SPA size was implemented. The feasibility of converting current ASSET code to CLOS was investigated. In addition, part of the code was converted to CLOS.
In recent years, many graphical approaches have been proposed to lift the inconvenience of text-based query language among end-users. The new query language called DFQL (DataFlow Query Language) is a fully graphical i...
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In recent years, many graphical approaches have been proposed to lift the inconvenience of text-based query language among end-users. The new query language called DFQL (DataFlow Query Language) is a fully graphical interface to the relational model based on a dataflow paradigm. It only requires users to connect some well-defined operators which have been given an equivalent one-to-one correspondent functionality (or consu"uct) in traditional query language (SQL in this case). All of the power of current query languages and sufficient expressive power and functionality are retained. But some shortcomings of DFQL user interface still exist. This thesis is to introduce a more ease-to-use and ease-to-leam user interface, so the shortcomings we found in DFQL user interface can be lifted and the productivity and power of the new version of DFQL can be increased. We have adopted object-oriented programming approach in our implementation and the benefits of using object-oriented programming in our development are also discussed.
During the last decade, the business sector has become increasingly reliant upon information management. This trend will most likely continue. Deficiencies/constraints in conventional database management systems conti...
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During the last decade, the business sector has become increasingly reliant upon information management. This trend will most likely continue. Deficiencies/constraints in conventional database management systems continue to become more apparent as this reliance continues to grow. Primary areas of deficiency are in modeling, storing, and managing increasingly complex information as in CAD and CASE among others. The purpose of this thesis is to implement a combined relational/object-oriented database management system that will overcome these deficiencies/constraints. Three possible approaches to such a system exist: build the system from scratch, build object- oriented capabilities on top of an existing relational system, or build relational capabilities on top of an existing object-oriented system. The last approach is the one chosen for this work. This thesis expands previous work in this area and uses a commercial object-oriented database management system, IDB, in its implementation.
The use of object-oriented programming in the development of artificial intelligence applications is becoming increasingly common, and researchers are beginning to articulate the benefits of this approach. We contribu...
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The use of object-oriented programming in the development of artificial intelligence applications is becoming increasingly common, and researchers are beginning to articulate the benefits of this approach. We contribute to this effort with our discussion of ParCE (Parsing with Constituent Experts), an object-oriented context-free parser. In this system, the knowledge required to parse individual sentence constituents is distributed among distinct constituent expert objects, rather than existing as a global, shared grammar and lexicon and centralized processing component. After reviewing the characteristics of the object-oriented paradigm, we describe the construction of the parser, and offer conclusions regarding the utility of the object-oriented approach in building the parser and intelligent systems in general
We are developing a computer-based method for the estimation of thermodynamic, physical, and chemical properties of organic compounds from their molecular structure. The method retains some of the simplicity and addit...
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We are developing a computer-based method for the estimation of thermodynamic, physical, and chemical properties of organic compounds from their molecular structure. The method retains some of the simplicity and additive character that have made group-contribution methods so useful, while using more chemical concepts to achieve wider applicability and better accuracy. The approach is based on the contributions of Atoms and Bonds in the properties of Conjugate forms (ABC) of a molecular structure. Conjugate forms are alternative formal arrangements of valence electrons in a molecule;a real chemical compound can be considered the hybrid of all its conjugates. In ABC, we start by generating all conjugate forms of the molecule whose properties we wish to estimate. Properties are assigned to each conjugate, simply by summing contributions from atoms and bonds in the particular electronic arrangement of the conjugate. Then, these properties of the conjugates are combined to derive the properties of the compound. A central computational issue in the method is the generation of the necessary large set of conjugates. The development and implementation of suitable algorithms for this task is facilitated by symbolic computing environments and object-oriented Progamming, which allow the flexible representation and manipulation of molecular structures;atoms, bonds, molecules, electron pairs, and other entities can be represented as interconnected objects. The generation, comparison, and analysis of conjugates can be carried out through computer-based manipulation of the objects and their interconnections. OOP will play an important role in the systematic application of the technique in the analysis and design of complex systems. Based on the ABC approach, a method for the estimation of the enthalpies of formation of acyclic hydrocarbons (saturated and unsaturated) is presented.
When designing real-time systems, suitable languages are needed due to the special demands of these types of systems. A real-time language must both support modelling of temporal as well as behavioural aspects of the ...
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When designing real-time systems, suitable languages are needed due to the special demands of these types of systems. A real-time language must both support modelling of temporal as well as behavioural aspects of the application. In order to meet the requirements of the more and more complex real-time applications. In this article we will describe an environment which supports both real-time and behavioural modelling, the object-oriented language RealTimeTalk (RTT). The language is based on the well-known Smalltalk paradigm. The choice of Smalltalk as a basis for RTT could be somewhat controversial, but as will be described in the article this is due to the simple syntax of Smalltalk which makes it easier to add and restrict features in the language, and the notion of building applications by components. The environment support design through frameworks. A framework is a well designed and thoroughly tested base for a certain application domain. A framework should also imply a specific design policy for its application domain. The overall goals of the RTT project are thus to simplify the modelling of real-time systems and in these types of systems include predictability and determinism.
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