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CVN 68 class solid waste flow analysis

NAVAL ENGINEERS JOURNAL 1998年第6期110卷 73-87页

作者： Markle, SP Gill, SE LCdr. Stephen P. Markely USN:is a career Engineering Duty Oficer assigned to Naval Sea Systems Command Arlington VA where he is Deputy Directol Environmental Protection Systems Division (SEA 03 LIB). He is responsible for Program Management activities associated with all afloat environmental protection equipment and serves on several teams designed to promote Navy wide awareraess of environmental protection requirements and Navy programs to meet these challenges. He is a 1993 graduate of the Naval Construction and Engineering Program at the Massachusetts Institute of Zchmlogy where he received a Naval Engineering Degree and Master of Science in Mechanical Engineering. His interest in environmental issues predates his undergraduate studies at Syracuse UniversitylState University of New York College of Environmental Science and Forestw where he received a Bachelm of Science degree in Forrest Engineering from the School of Environmental and Resource Engineeriw. LCdr Markle has qualified as a Surface Warfare Oficer and in submarines through Engineering Duty Dolphin Program. He is a Professional Engineer registered in the State of New York and is a member ofASNE NSPE ASTM SNAME and SAE. Sean G. Gill:is a Senior Engineer with GEO-CENTERS incorporated in Pittsburgh PA where he provides technical and administrative support to the Naval Sea Systems Command (SEA 03L1) and the Carderock Division of the Naval Surfme Waflare Center (Code a) principal& on the shipboard and submarine solid waste management programs. Prior to joining GEO-CENTERS incorporated in 1996 he worked for eleven years at the Carderock Division of the Naval Surfme Warfare Center as a project engineer and a Branch Head. In the former capacity Mr Gill participated in various blackwatel gray watel and oily wastewater treatment projects oversaw the development of the Navy Pulper and was Center's technical team leader for the NAVSEA Solid Waste management program. In 1994 he was assigned to be Branch Head of Code 634 the Solid Waste Management

Through a detailed Research and Development program, the U.S. Navy has developed a suite of shipboard solid waste management equipment enabling compliance with federal and international law. Four major equipment types have been developed to outfit twenty-seven classes of naval surface ships. The major equipment types are: Plastic Waste Processor (PWP), Metal/Glass Shredder (MGS), Large Pulper (LP), and Small Pulper (SP). The Navy is aggressively procuring and installing this equipment aboard all ships of FFG 7 Class and larger. A deadline of December 31, 2000 has been set for completion. engineering analysis and held waste generation studies were conducted to select the specific equipment suite and develop alteration documentation for each ship class. Specific factors in this process were: solid waste generation rates, equipment reliability analysis, ship arrangement considerations, daily equipment operation Limits, and shipboard quality of life issues. A solid waste management study was conducted in the fall of 1997 to validate Navy equipment and ship design parameters onboard the USS John C. Stennis (CVN 74). Generation rates for shipboard solid waste were determined for plastic, metal and glass, food, paper, cardboard, fabric and wood. engineering analysis of data allowed a decrease in CVN 68 Class design waste generation rates. engineering analysis enabled a reduction in the number of PWPs and MGSs required, and fewer spaces for efficient operation. Ship arrangement studies were conducted to optimize efficiency and equipment mix of Solid Waste Processing Rooms (SWPRs) relative to waste generation sites. This paper briefly articulates the process followed by the Navy in responding to regulations governing solid waste management in the marine environment. Evidence validating the engineering procedures followed is presented.

关键词： Ship equipment

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Hardware-based parallel firefly algorithm for embedded applications

Hardware-based parallel firefly algorithm for embedded appli...

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NASA/ESA Conference on Adaptive Hardware and systems (AHS)

作者： Daniel M. Muñoz Carlos H. Llanos Leandro dos Santos Coelho Mauricio Ayala-Rincón Electronics Engineering Graduate Program Faculty of Gama University of Brasilia Brasilia DF Brazil Department of Mechanical Engineering University of Brasilia Brasilia DF Brazil Industrial and Systems Engineering Graduate Program LAS/PPGEPS Pontifical Catholic University of Parana Curitiba Parana Brazil Departments of Computer Science and Mathematics University of Brasilia Brasilia DF Brazil

ISBN: (纸本)9781467363822

The firefly algorithm (FA) is a new population-based metaheuristic bioinspired on the behavior of the flashing characteristics of fireflies. As a population-based algorithm, the FA suffers from large execution times specifically for embedded optimization problems with computational limitations. For reducing execution times we propose a hardware parallel architecture of the FA algorithm that facilitates the implementation in Field programmable Gate Arrays (FPGAs). In addition, this work proposes the application of the opposition-based learning (OBL) approach to the FA algorithm. The respective hardware implementation (HPOFA) was mapped into a Virtex5 FPGA device and numerical experiments using four well-known benchmark problems demonstrate that the opposition-based approach allows the FA algorithm to improve its functionality, preserving the swarm diversity and avoiding the premature convergence problem. Synthesis results point out that the HPOFA architecture is effectively mapped in hardware and is suitable for embedded applications.

关键词： Hardware Computer architecture Optimization Equations Random access memory Field programmable gate arrays Search problems

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Low-dose intrapulmonary drug delivery device for studies on next-generation therapeutics in mice

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Journal of Controlled Release 2023年第1期359卷 287-301页

作者： Gracioso Martins, Ana Maria Snider, Douglas B. Popowski, Kristen D. Schuchard, Karl G. Tenorio, Matias Akunuri, Sandip Wee, Junghyun Peters, Kara J. Jansson, Anton Shirwaiker, Rohan Cheng, Ke Freytes, Donald O. Cruse, Glenn P. Department of Molecular Biomedical Sciences College of Veterinary Medicine North Carolina State University RaleighNC United States Comparative Medicine and Translational Research Training Program North Carolina State University RaleighNC United States Comparative Medicine Institute North Carolina State University RaleighNC United States Joint Department of Biomedical Engineering College of Engineering North Carolina State University & University of North Carolina-Chapel Hill NC United States Edward P. Fitts Department of Industrial and Systems Engineering North Carolina State University RaleighNC United States Department of Mechanical and Aerospace Engineering North Carolina State University RaleighNC United States Analytical Instrumentation Facility Monteith Research Center North Carolina State University RaleighNC United States

Although nebulizers have been developed for delivery of small molecules in human patients, no tunable device has been purpose-built for targeted delivery of modern large molecule and temperature-sensitive therapeutics to mice. Mice are used most of all species in biomedical research and have the highest number of induced models for human-relevant diseases and transgene models. Regulatory approval of large molecule therapeutics, including antibody therapies and modified RNA highlight the need for quantifiable dose delivery in mice to model human delivery, proof-of-concept studies, efficacy, and dose-response. To this end, we developed and characterized a tunable nebulization system composed of an ultrasonic transducer equipped with a mesh nebulizer fitted with a silicone restrictor plate modification to control the nebulization rate. We have identified the elements of design that influence the most critical factors to targeted delivery to the deep lungs of BALB/c mice. By comparing an in silico model of the mouse lung with experimental data, we were able to optimize and confirm the targeted delivery of over 99% of the initial volume to the deep portions of the mouse lung. The resulting nebulizer system provides targeted lung delivery efficiency far exceeding conventional nebulizers preventing waste of expensive biologics and large molecules during proof-of-concept and pre-clinical experiments involving mice. (Word Count =207). © 2023 Elsevier B.V.

关键词： Molecules

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Forecasting modeling for energetic efficiency in an industrial process

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Chemical engineering Transactions 2016年 52卷 1081-1086页

作者： Acosta, Simone M. Sant'Anna, Angelo M. O. Canciglieri, Osíris Av. Sete de Setembro Curitiba3165 Brazil Mechanical Engineering Department Federal University of Bahia Rua Aristides Novis 2 Salvador Brazil Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Parana Rua Imaculada Conceição 1155 Curitiba Brazil

ISBN: (纸本)9788895608426

The quality of products and processes is a permanent challenge for industries, and such challenge is no different in steelmaking processes. One of the main problems affecting the quality of steel products is the existence of contaminants in alloy steel, and phosphorus (P) is a major contamination element interfering with the steelmaking process. The increased P levels can severely affect the physical integrity of steel bonds, thus threatening the quality of the final product. This paper proposes a robust approach to model the phosphorus concentration levels in the steelmaking process. The proposed approach consists in applying the artificial neural networks techniques for improving the energetic efficiency of the industrial process. We used the improved neural network models inspired in the human nervous system for processing the information. The different techniques used for modelling the phosphorus levels investigate the variables that have a significant influence on refining process. Based on the better predictive model, the increase of phosphorus levels in the final product is related to initial levels of carbon, oxygen, magnesium, manganese oxide and calcium oxide. The results illustrate the efficiency of the techniques used in the modelling, with emphasis on the adequacy of the predictive models constraints in the refining process. This study presents a relevant strategy to model characteristics' of raw material based on forecasting strategy to the efficiency of alloys and steel industry. Copyright © 2016, AIDIC Servizi S.r.l.

关键词： Efficiency

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An autonomous, visually-guided, counter-sUAS aerial vehicle with net countermeasure

An autonomous, visually-guided, counter-sUAS aerial vehicle ...

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AIAA Atmospheric Flight Mechanics Conference, 2016

作者： Horiuchi, Timothy K. Paras, Marc Cervi, Tim Oursler, Brent Sanz, Santiago Gaus, Joshua Mccoll, Daniel Woller, Stephen Woodbury, Donald Faruque, Imraan Xu, Huan Department of Electrical and Computer Engineering University of Maryland College ParkMD20742 United States Department of Mechanical Engineering University of Maryland College ParkMD20742 United States Department of Aerospace Engineering University of Maryland College ParkMD20742 United States Division of Research University of Maryland College ParkMD20742 United States Institute for Systems Research University of Maryland College ParkMD20742 United States Neuroscience and Cognitive Science Program University of Maryland College ParkMD20742 United States

ISBN: (数字)9781624104305

ISBN: (纸本)9781510827431

To address the growing concern of small unmanned aircraft systems (sUAS) entering the airspace over a public event, building, or other protected spaces (whether for recreational purposes or with malicious intent), we are developing a counter-sUAS solution. This solution is based on an aerial intercept vehicle that autonomously pursues the target sUAS and launches a net to entangle the propellers and/or unbalance the sUAS to bring it to the ground. The intercept vehicle is a hexacopter that is guided by a visible-light camera and a single-pixel lidar mounted on a gimbal to track the target sUAS. A custom-built, lightweight, C02 cartridge-powered, net launcher mounted to the top of the vehicle fires when the intercept vehicle is oriented properly at the target and when it is in range. In this manuscript, we describe the problem constraints, system design, image processing chain, computational infrastructure, physical implementations, and various measurements of performance. We describe the current state of development and our experience with the challenge of designing effective countermeasures. Copyright © 2016 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.

关键词： Image processing

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Examination of appearance conditions of singular stress fields at the vertex and along the side of interface in prismatic butt joint

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Journal of Japan Institute of Electronics Packaging 2020年第2期23卷 155-165页

作者： Miyazaki, Tatsujiro Sato, Keisuke Fujiwara, Takahiro Noda, Nao-Aki Sano, Yoshikazu Energy and Environment Program School of Engineering Faculty of Engineering University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa903-0213 Japan Department of Mechanical Systems Engineering Graduate School of Engineering and Science University of the Ryukyus 1 Senbaru Nishihara-cho Nakagami-gun Okinawa903-0213 Japan Department of Mechanical Engineering Graduate School of Engineering Kyushu Institute of Technology 1-1 Sensui-cho Tobata-ku Kitakyushu-shi Fukuoka804-8550 Japan

In this paper, we discuss the bad pair condition causing a singular stress at a vertex of the interface in three dimensional (3D) prismatic butt joints in comparison with the bad pair condition along the side. 3D finite element (FE) eigenanalysis is applied to obtain the singular index. We found that the bad pair condition at a vertex is slightly different from the well-known 2D bad pair condition α(α- 2β) > 0 , which can be expressed using Dundurs' parameter (α, β). It should be noted that in most cases the bad pair can be judged by (α, β) except for some cases where the bad pair depends on the material combination even under the same (α, β). To clarify the difference, the bad pair conditions are compared on the (α, β) diagram. For convenience, a simple expression for a bad pair is proposed on the basis of the theoretical consideration, and the validity is confirmed numerically. We also confirm that the bad pair condition along the side of the interface can be expressed using Dundurs' parameter as α(α- 2β) > 0 . © 2020 Japan Institute of Electronics Packaging. All rights reserved.

关键词： Stresses

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Hierarchical approach in steam network modelling

Hierarchical approach in steam network modelling

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National Proceedings Power and Energy Conference (PECon)

作者： R. Arghandeh Jouneghani M. Amidpour A. Ghaffari MSc joint Program University of Manchester K. N. Toosi University of Technology Tehran Iran Mechanical Engineering Dept Energy Systems Group K.N. Toosi University of Technology Tehran Iran Mechanical Engineering Dept K.N. Toosi University of Technology Tehran Iran

The objective of this paper will be to solve current open problems and trends in steam network wide modeling and demonstrate a solution based on distributed and synthetically modeling approach. The presented model for plant steam network has nonlinear dynamics varying with total steam demand and the letdown amount from the superheated steam (SH) header and the amount of SH steam produced at the boilers showed good agreement with those of actual operational data. Suggested model by simpler structure is developed in harmony with real time control and optimization purposes.

关键词： Mathematical model Boilers Turbines Nonlinear dynamical systems Power generation Power system modeling Thermodynamics Computer languages Uncertainty Analytical models

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Study of classification of failure states for Small Unmanned Ground Vehicle by response surface methodology

Study of classification of failure states for Small Unmanned...

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International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Young Kook Kim Dooyeol Koh Sang Hoon Lee Soohyun Kim Robotics Program Korea Advanced Institute of Science and Technology Daejeon South Korea Division of Mechanical Engineering School of Mechanical AeroSpace and Systems Engineering Korea Advanced Institute of Science and Technology Daejeon South Korea 5th Research and Development Institute-2 Agency for Defense Development Daejeon South Korea

ISBN: (纸本)9781457707223

SUGV(Small Unmanned Ground Vehicle) used for human rescue and military operation is need to overcome the environment that tough terrains such as a hole or high obstacles. As far as the survival of the vehicle and the preserving ability of the information in the vehicle are concerned, it is essential to have an approach for recognizing unattainable driving states. However, despite the fact that the study of obstacle avoidance and stabilization of SUGV is focused on, it is hardly found out ways of classifying unattainable driving states with the sensors mounted on the SUGV unit. In order to overcome the problem, this paper proposes a practical way for classifying SUGV Failure State(SFS) with the meaningful parameters by statistical method, response surface methodology(RSM).

关键词： Response surface methodology Equations Vehicles Mathematical model Robot sensing systems

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Hardware Particle Swarm Optimization with passive congregation for embedded applications

Hardware Particle Swarm Optimization with passive congregati...

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Southern Conference on programmable Logic

作者： Daniel M. Muñoz Carlos H. Llanos Leandro dos S. Coelho Mauricio Ayala-Rincón Department of Mechanical Engineering Automation and Control Group/GRACO University of Brasilia Brazil Industrial and Systems Engineering Graduate Program LAS/PPGPES Pontifical Catholic University of Paraná Curitiba Parana Brazil Department of Computer Science and Mathematics University of Brasilia Brazil

Achieving high performance optimization algorithms for embedded applications can be very challenging, particularly when several requirements such as high accuracy computations, short elapsed time, area cost, low power consumption and portability must be accomplished. This paper proposes a hardware implementation of the Particle Swarm Optimization algorithm with passive congregation (HPPSOpc), which was developed using several floating-point arithmetic libraries. The passive congregation is a biological behavior which allows the swarm to preserve its integrity, balancing between global and local search. The HPPSOpc architecture was implemented on a Virtex5 FPGA device and validated using two multimodal benchmark problems. Synthesis, simulation and execution time results demonstrates that the passive congregation approach is a low cost solution for solving embedded optimization problems with a high performance.

关键词： Hardware Computer architecture Software Field programmable gate arrays Benchmark testing Optimization Software algorithms

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CABLE BURIAL IN THE DEEP OCEAN-FLOOR

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NAVAL ENGINEERS JOURNAL 1980年第2期92卷 218-230页

作者： ROCKWELL, PK ENGEL, JH PIERCY, WB Mr. Philip K. Rockwell joined the Ocean Engineering Department at the Civil Engineering Laboratory (CEL) in 1969 after receiving his B.S. and M.S. degrees in Engineering from the University of California Los Angeles (UCLA) and in 1973 won the WEPCOSE Scholarship which took him to the University of Washington for postgraduate studies in Fluid Power Control Systems. Since joining CEL he has specialized in Underwater Manipulator and Diver Tool Systems has been the Project Engineer and Navy certified submersible operator for the manned submersible NEMO and has been responsible for the design test and evaluation of submersible fluid power and fluid power control systems. His most recent efforts have been on the Deep Ocean Cable Burial System for which he has been responsible for concept development program management validation testing. and coordination and planning for the total system design and fabrication. Mr. Rockwell is an Engineer-in-Training (EIT) in the state of California and in 1979 was awarded the Meritorious Civil Service Award for his outstanding performance. Mr. John H. Engel Jr. is a Mechanical Engineer in the Construction Systems Division Ocean Engineering Department. of the Civil Engineering Laboratory. He is a graduate of Oregon State University for which he received both his B.S. and M.S. degrees in Mechanical Engineering. Prior to joining CEL in 1975 he was involved with the design and development of remote oceanographic devices for the School of Oceanography at Oregon State University. At CEL he has worked in the areas of Underwater Gas Generation and Buoyant Lift Systems and at the present time is responsible for the mechanical design of the shallow water mooring for the initial ocean tests of the Current Measurement System. Mr. Engle also is a registered Engineer-in-Training in the state of Oregon. Mr. William Bruce Piercy at the present time is a student at the University of California at Berkeley where he is studying for his M.S. degree in Engineering having received his B.S. degr

Bottom fishing equipment employed by scallopers and trawlers routinely damage or break important Navy Oceanographic cables resulting in substantial repair coats and unacceptable system interruption. The Civil engineering Laboratory (CEL), sponsored by the Naval Facilities engineering Command (NAVFACENGCOM), has been developing and validating an engineering concept for a Deep Ocean Cable Burial (DOCB) System. This DOCB System will providethe Navy with an efficient, effective and reliable means of burying cables 3-feet deap in ocean mediments, at speeds not less than one knot, to water depths of 6,000 feet. The DOCB System b a remotely controlled machine which underruns and buries existing (previously laid) cables. It is powered and controlled from a surface ship via an electromechanical umbilica cable. The machine is self-propelled by ducted thrusters and supported on water lubricated skids. The excavation system computer an orbital vibrating plowshareand a vertical waterjet. Full-scale field testing at CEL baa keyed on three areas: •. Quantifying the reduction in drawbar force achieved by applying orbital vibration to an upward cutting plowshare. •. Evaluating a Vertically impinging jet nozzle for depth of a cut M a function of jet operating parameters. •. Demonstrating the effect on the soil drag of a flat-bottomed skid due to forcing a thin layer of water between the skid and the seafloor. The field teats of an orbital vibratory plow were performed in a 1 to 2 psi clay simllar to that found on the ocean floor. The results showed that a 70% reduction in drawbar force was achieved by applying an elliptical orbital vibration. It was also shown that the vibration feature would split or push aside buried rocks which would have stalled a conventional stationary plow. The water jet tests demonstrated that a 2 1/2-in. nozzle cuts 36-in. deep in 1 to 2 psi clay. The nozzle pressure was 75 psi and flow was 1,200 gpm. The water jet did not produce a clearly defined trench, b

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