作者:
dr. Roy L. StreitSince 1992
Dr. Streit has focused a significant amount of his energy to assignment problems in acoustic warfare data fusion systems. This work led him to the formulation of the PDD Principle a broadly useful theoretical method that enables the derivation of new classes of discrete-continuous estimation algorithms for solving assignment problems without requiring enumeration and pruning. In recognition of his outstanding work in this area Dr. Streit received the NAVSEA Scientist of the Year Award for 1997. Dr. Streit has also been pursuing avenues for analyzing the loss in broadband detection performance of an acoustic array in the presence of interferences. Because examining all possible separations between the signal and many interferers is infeasible he has proposed a Poisson process model for the number and location (s) of the interferers. In this same time period Dr. Streit has also been investigating issues in environmental modeling and localization by proposing a novel integral method for solving the bearings-only target motion analysis problem which enables a natural heuristic for compensating for mismatch between the model predictions and the real world. Most recently Dr. Streit has proposed the Numerical ACoustic Hull ARray (NACHAR) Project as a revolutionary and ambitious approach to hull array design. Its premise is that optimizing the detection capability of large hull arrays requires the full integration of hull sensor array and beamformer design processes. Because NACHAR crosses an unusual number of technical disciplines it involves researchers from several departments. The diversity of Dr. Streif s technical background makes him uniquely suited to lead the project Dr. Streifs truly impressive scientific achievements are complemented by a noteworthy list of professional activities that accentuate his value to Division Newport and the Navy. He represents the United States in The Technical Cooperation Program Maritime Activities Panel 9 (Sonar Technology) and participates in the Division New
for his significant engineering research anddevelopment in sonar array research and acoustic transient signals as set forth in the following
for his significant engineering research anddevelopment in sonar array research and acoustic transient signals as set forth in the following
作者:
Yi-Sheng HuangSheng-Luen ChungMu-der JengDepartment of Aeronautical Engineering
Chung Cheng Institute of Technology National Defense University Tashi Taoyuan 335 Taiwan R.O.C. Department of Electrical Engineering
National Taiwan University of Science and Technology Taipei 106 Taiwan R.O.C. Department of Electrical Engineering
National Taiwan Ocean University Kellung 202 Taiwan R.O.C. MuDer Jeng received the Ph.D. degree in computer and systems engineering from Rensselaer Polytechnic Institute
Troy NY in 1992. Since August 1992 Dr. Jeng has been with National Taiwan Ocean University Keelung Taiwan where he is currently a full Professor at the Department of Electrical Engineering. His current research interests include Petri nets discrete event systems computer integrated manufacturing semiconductor factory automation embedded systems. Dr. Jeng is the author/co-author of over 120 book chapters journal papers and conference papers. Dr. Jeng received the Franklin V. Taylor Outstanding Paper Award from the IEEE Systems Man and Cybernetics Society in 1993. He was granted the Research Award by the National Science Council of Taiwan annually from 1994 to 2000. He is an Associate Editor for IEEE Transactions on Systems Man and Cybernetics-Part A IEEE Transactions on Robotics and Automation IEEE Transactions on Robotics and serves on the Editorial Board of International Journal of Computer Integrated Manufacturing. He has been a Guest Editor for eight leading journals. Dr. Jeng is the Chair of the Technical Committee on Discrete Event Systems of the IEEE SMC Society and the Founding Chair of the Technical Committee on Semiconductor Factory Automation of the IEEE Robotics and Automation Society. He served as the Exhibitions Chair of 2003 IEEE International Conference on Robotics and Automation and the Special Sessions Chair of 2004 IEEE International Conference on Networking Sensing and Control. He serves as a Program Co-Chair of 2005 IEEE International Conference on Networking Sensing and Control and the Organization Commit
Statechart has been utilized as a visual formalism for the modeling of complex and interactive systems for its illuminating features on describing properties of causality, concurrency, and synchronization. This paper ...
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Statechart has been utilized as a visual formalism for the modeling of complex and interactive systems for its illuminating features on describing properties of causality, concurrency, and synchronization. This paper presents the application of satechart to the modeling, design and implementation of an elevator system, whose system behavior involves aggregating complexity of state descriptions, and imposition of underlying control policy. Based on the operational flow of an elevator, we derive the associated statechart model by looking into the inherent hierarchical structure of the elevator. The advantage of the proposed approach is the clear presentation of system behavior in terms of conditions and events that cause the transitions in system dynamics. Implementation of the controlled elevator based on the modeled statechart is also presented.
Gold nanoparticles are produced in some plants when soluble gold is present in the growth medium nutrients. Release and recovery of this gold by pyrolysis can sinter the particles, and enzymatic digestion is proposed ...
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ISBN:
(纸本)081691012X
Gold nanoparticles are produced in some plants when soluble gold is present in the growth medium nutrients. Release and recovery of this gold by pyrolysis can sinter the particles, and enzymatic digestion is proposed as an alternative. Brassica juncea grown on soil containing low levels of gold, copper and silver (22-48 mg Au kg-1, 44-45 mg Cu kg-1 and 0-31 mg Ag kg -1 respectively) contained gold at weight concentrations circa 1000 ppm dry matter. 55-60 wt% of the dried plant matter was solubilised by enzymatic digestion, but 50-60% of the gold initially present was lost to solution during the digestion. XANES analysis shows that gold is present in the plant in approximately equal quantities in the metallic (Auo) and oxidized (Au+1) states. The gold lost during digestion is thought to be gold present in the plant in a soluble form (Au+1).
This survey is devoted to the significant role of various dry friction laws in engineeringsciences. Both advantages anddisadvantages of a frictional process are illustrated anddiscussed, but excluding the nature of...
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Jiangsu Province, after executing economic inter- nationalization strategy and establishing the strategic goal of foreign-trade strong province,meaning to pur- sue a dominating position in the foreign trade relations,...
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Jiangsu Province, after executing economic inter- nationalization strategy and establishing the strategic goal of foreign-trade strong province,meaning to pur- sue a dominating position in the foreign trade relations, has become one of the foreign-trade large provinces of China and provided considerable international com- petitive power in some important fields. The period of the first twenty years of this century will be the impor- tant strategic favorable opportunity period for Chinese development. The external motive force of our coun- try for the economic development will not weaken greatly. The economic society of Jiangsu Province will walk into the industrialization type-transforming period, urbanization acceleration period, internation- alization advancement period, market consummation period and information penetration period. In order to promote Jiangsu Province converting from a foreign- trade large province into a foreign-trade strong province, Jiangsu should command the foreign-trade affairs through the scientific evolution concept, man- age the relation between the opening to the outside world and the domestic development, comply with the economy globalization, propel the internationalization of production, industry, capital and talents, improve the hierarchy of opening to the outside world, and quicken the internationalization progress. Also, Jiangsu province should maintain the steady continuous for- eign-trade growth, change the foreign-trade growth mode, modify the imports and exports merchandise composition and establish the marketing system to the international market. Furthermore, under the condition of moderate growth of general quantity of foreign trade, Jiangsu Province should advance and modify the im- ports and exports merchandise composition, improve the technology and value-added content of the export production, create the independent trademarks of the export production, foster the leading companies hav- ing the independent development ab
Aboard current ships, such as the ddG 51, engineering control anddamage control activities are manpower intensive. It is anticipated that, for future combatants, the workloaddemand arising from operation of systems ...
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Aboard current ships, such as the ddG 51, engineering control anddamage control activities are manpower intensive. It is anticipated that, for future combatants, the workloaddemand arising from operation of systems under conditions of normal steaming andduring casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current ddG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as dd 21 and the integratedengineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workloaddemand reduction and, consequently, manning reduction that can be achieveddue to application of several advancedtechnology concepts. Advanced system concept studies in relation to workloaddemand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current ddG 51 activities. development of the reduced ship's crew by virtual presence system that will provide automated monitoring anddisplay to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.
作者:
Smith, dEBreslin, dAToms, GSNorton, PDENNIS E. SMITH
PH.D. is currently a statistical consultant for GEO-CENTERS INC. He received a B.A. in Mathematics (magna cum laude)from Wabash College and an M.S. in mathematics
an M.S. in statistics and a Ph.D. in statistics from the University of Wisconsin. From November 1973 until February 1999 he was president and principal statistician at Desmatics Inc. where he participated in a number of studies involving the application of statistical methods to various technical problems in the Navy's environmental-protection and auxiliary-machinery programs. Dr. Smith was instrumental in developing the statistical procedures underlying the Navy's ODS reserve monitoring plan. DAVID A. BRESLIN
P.E. is the director of technical operations for the Naval Surface Warfare Center and chairs the ASNE/SNAME Joint Committee on Environmental Engineering. He received a master of science in aerospace engineering from Virginia Tech a master of engineering administration in industrial and systems engineering from Virginia Tech and a bachelor of engineering in mechanical engineering from Stevens Institute of Technology. From 1993 to 1997 he was the program manager of the Naval Sea Systems Command's CFC and Halon Elimination Program and played a critical role in establishing the Navy's strategic reserve of ozone-depleting substances. Because of his many efforts he received a Stratospheric Ozone Protection Award in 1995 from the U.S. Environmental Protection Agency in recognition of “exceptional contributions to global environmental protection”. GREGORY S. TOMS
P.E. is the CFC &Halon Elimination Program Manager for the Naval Sea Systems Command (NAVSEA). He received a master of science degree in mechanical engineering from the University of Maryland and a B.S. degree in mechanical engineering from West Virginia University. From 1984 to 1997 he was employed at the Naval Surface Warfare Center Carderock Division Annapolis Detachment (formerly David Taylor Research Center)where he worked on the development of advanced cent
The domestic production of the most powerful ozone-depleting substances (OdSs) has permanently ceased and the abundant supplies of a number of refrigerants, fire-fighting agents, and solvents, once taken for granted, ...
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The domestic production of the most powerful ozone-depleting substances (OdSs) has permanently ceased and the abundant supplies of a number of refrigerants, fire-fighting agents, and solvents, once taken for granted, are now a thing of the past. The Navy has adopted a successful strategy for addressing the threat posed by the unavailability of OdSs. That strategy includes relying on a strategic reserve of OdSs. Considering that the strategic reserve will play a critical role in sustained Fleet operations into the middle of the century, it is important to record the history of the reserve and to document lessons learned in order to educate future generations that may face similar challenges. This is the third of three papers that cover all aspects of the Navy's strategic reserve of OdSs. Breslin (1999) documented the history of the Navy's effort to size, establish, and monitor a reserve designed to support Fleet operations until the middle of the century. Breslin, Smith, and Toms (2000) addressed in detail the process used to estimate the required size of the reserve, including the survey method, statistical analyses, and sizing algorithms. This paper discusses the Navy's plan for monitoring the Navy's strategic reserves of OdSs anddescribes the methods used in the monitoring process. In particular it discusses the underlying assumptions and statistical techniques associated with the Navy's prediction of the expecteddrawdown of the reserves. A comparison of actual data, collected since the strategic reserves began operations in 1995, with the predicted reserve drawdown, is included in the paper.
作者:
Smith, dEBreslin, dAToms, GSDENNIS E. SMITH
PH.D. is a statistical consultant for Geo-Centers Inc. He received a B.A. in mathe-matics (magna cum laude) from Wabash College and an M.S. in mathematics
an M.S. in statistics and a Ph.D. in statistics from the University of Wisconsin. From November 1973 until February 1999 he was President and Principal Statistician at Desmatics Inc. where he participated in a number of studies involving the application of statistical methods to various technical problems in the Navy's environmental-protection and auxiliary-machinery programs. Dr. Smith was instrumental in developing the statistical procedures underlying the Navy's ODS reserve monitoring plan. DAVID A. BRESLIN
P.E. is the Director of Technical Operations for the Naval Surface Warfare Center and is the chairperson of ASNE's Committee on Environmental Engineering. He received a master of science degree in aerospace engineering from Virginia Tech a master of engineering administration in indus-trial & systems engineering from Virginia Tech and a bachelor of engineering in mechanical engineering from Stevens Institute of Technology. From 1993 to 1997 he was the program manager of the Naval Sea Systems Command's CFC & Halon Elimination Program and played a critical role in establishing the Navy's strategic reserve of ozone-depleting substances. Because of his many efforts he received a Stratospheric Ozone Protection Award in 1995 from the U.S. Environmental Protection Agency in recogni-tion of “exceptional contributions to global environmental protection”. GREGORY S. TOMS
P.E. is the CFC & Halon Elimination Program Manager for the Naval Sea Systems Command (NAVSEA). He received a master of science degree in mechanical engineering from the University of Maryland and a B.S. degree in mechanical engineering from West Virginia University. From 1984 to 1997 he was employed at the Naval Surface Warfare Center Carderock Division Annapolis Detachment (formerly David Taylor Research Center) where he worked on the development of advanced cent
This paper reviews an inexpensive statistical-sampling methodology that can be used to determine the attrition rates of certain types of shipboard equipment. The methodology relies on surveys that are conducted in con...
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This paper reviews an inexpensive statistical-sampling methodology that can be used to determine the attrition rates of certain types of shipboard equipment. The methodology relies on surveys that are conducted in conjunction with regularly scheduled ship visits over a period of time and a statistical analysis of the survey results. The statistical technique allows for reasonably accurate estimates to be made of attrition rates. The specific example cited in this paper is related to galley-type refrigeration equipment, such as salad chillers, beverage dispensers, et cetera. In the case of galley-type refrigeration equipment, the Navy needs to know whether the Fleet's inventory of equipment relying on Class I Ozone-depleting Substances (OdSs) will be replaced through natural attrition by the end of fiscal year (FY) 2005, at which time supplies of OdS-based refrigerants will no longer be available for use by ship galleys. This paper outlines the process used to gather data, the analysis of the data, and concludes that the Navy's inventory of galley equipment using Class I OdSs will be replaced through natural attrition by the end of FY05. The methodology reviewed by this paper has wider applications. For various types of shipboard equipment, the methodology can also be used to estimate with reasonable accuracy life expectancies, configurations, conditions, and other items of interest.
By means of a logarithm law for the velocity profile, a corrected formula of bed resistance coefficient, which involves many factors such as gradient of still water depth, variation of surface elevation, flow directio...
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By means of a logarithm law for the velocity profile, a corrected formula of bed resistance coefficient, which involves many factors such as gradient of still water depth, variation of surface elevation, flow direction, and so on, is derived from the 3d governing equations of tidal current by averaging over the whole water depth. Theoretical analysis and application have shown that the 2d plane tidal current numerical model would be more reasonable and could be applied to steep bottom topograph. when the corrected bed resistance coefficient is used, therefore the results of reproduction simulation andengineering calculation would be more scientific and reasonable.
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