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Effective method on modeling for fermentation process

Beijing Gongye Daxue Xuebao / Journal of Beijing University of technology 2006年第5期32卷 405-409页

作者： Gao, Xue-Jin Wang, Pu Sun, Chong-Zheng Yi, Jian-Qiang Zhang, Ya-Ting Zhang, Hui-Qing College of Electronic Information and Control Engineering Beijing University of Technology Beijing 100022 China Key Laboratory of Complex System and Intelligence Science Chinese Academy of Sciences Beijing 100033 China

On the basis of the standard SVM for regression, the dynamic Ε-SVM method was proposed to establish precise mathematical models to describe the behavior of biochemistry systems, namely each training sample used different error. At the same time, an improved multi-objective Genetic Algorithm (MOGA) was used to automatically select the dynamic Ε-SVM parameters. A new modeling method that combined improved MOGA with dynamic Ε-SVM regression was presented. The model for titer pre-estimate was developed in Matlab6.5 with data collected from real plant. The model possessed the strong capability of fitting and generalization. It is shown that the method achieves significant improvement in the generalization performance in comparison with the modeling method based on MOGA and the standard SVM.

关键词： Fermentation

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Correlation between time and frequency domain polarisation measurements for transformer moisture assessment

Correlation between time and frequency domain polarisation m...

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作者： Saha, T.K. Middleton, R. Thomas, A. School of Information Technology and Electrical Engineering University of Queensland School of Electrical Engineering and Computer Science University of Newcastle Department of Electrical Engineering School of Information Technology and Electrical Engineering University of Queensland Australia Engineers Australia University of Newcastle Centre for Complex Dynamic Systems and Control CRC Board of Governors IEEE Control System Society University of Queensland's School of Information Technology and Electrical Engineering

Preventative diagnosis and maintenance of transformers has become more popular in recent times in order to improve the reliability of electric power systems. A number of transformers have recently been tested using Return Voltage (RV) and Dielectric Dissipation Factor (tanδ) measurements in the time and frequency domain, respectively. This paper outlines a circuit model which describes the dielectric behaviour of the transformer insulation system and has been parameterised from the frequency domain data. This model was then used to simulate RV and Polarisation-Depolarisation current (PDC) results. Some recommendations about the diagnosis of the transformers have been proposed. © Institution of Engineers.

关键词： Electric transformers

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Fault tolerance for communication-based multirobot formation

Fault tolerance for communication-based multirobot formation

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Lei Cheng Yong-Ji Wang Center for Nonlinear and Complex System Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)0780384032

This paper investigates the ability of fault tolerance for multirobot formation, which is important for practical formation in complex environment. Our model enables mobile robots group to continue to complete given tasks by reorganizing their formation, when some members are in failure. First, to build such model, a multi-agent architecture is presented, which is implemented through communication. Second, we introduce the hierarchy graph of multirobot formation to be the theoretical foundation of the fault tolerance system. The graph analysis is suitable for general leader-follower formation format. And then, the failure detection mechanism for formation is discussed. Finally, integrated fault tolerance algorithm is investigated, including supplement for faulty robots and formation reconfiguration. The improved agent architecture adding the fault tolerance module is also presented. The experiments on real multiple mobile robots demonstrate our design is feasible.

关键词： Fault tolerance Mobile robots Fault tolerant systems Communication system control Robot kinematics Mobile communication control systems Multirobot systems Intelligent sensors Engines

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Localization of the autonomous mobile robot based on sensor fusion

Localization of the autonomous mobile robot based on sensor ...

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IEEE International Symposium on Intelligent control (ISIC)

作者： Lei Cheng Yongji Wang Center for Nonlinear and Complex System Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan China

This paper emphasizes on the sensor fusion algorithm on mobile robot's localization, to solve the problem of accumulated error attributed to wheel encoders and redundant readings in multi-sonar system. Based on the error analysis of wheel encoders and sonar, a new integrated intelligent sensor fusion algorithm is introduced, the novel core of such algorithm is error judgement rule. With this technique, the mobile robot can autonomously correct its position in proper time. As demonstration, an experiment on the Pioneer II mobile robot has been completed. Pioneer II is an intelligent mobile robotic platform manufactured by ActivMedia Corporation, it is equipped with an internal wheel encoders and a full-span sonar ring. The experiment result shows that such algorithm not only avoids the error accumulation with regard to wheel encoders, but also guarantees the motion speed of robot.

关键词： Mobile robots Sensor fusion Wheels Sonar Robot kinematics Intelligent sensors Intelligent robots Signal processing algorithms Robot sensing systems Error analysis

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Fuzzy variable structure control for trajectory tracking of two-link flexible manipulators

Fuzzy variable structure control for trajectory tracking of ...

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International Conference on Machine Learning and Cybernetics (ICMLC)

作者： Yu-Hu Cheng Xue-Song Wang Jiang-Qiang Yi Laboratory of Complex System and Intelligent Science Institute of Automation Chinese Academy and Sciences Beijing China Department of Automatic Control Beijing Institute of Technology Beijing China

ISBN: (纸本)0780378652

According to the existing problems of flexible manipulator control, a kind of fuzzy variable structure controller based on the principle of sliding-mode variable structure control is proposed by well considered both the dynamic and static control properties of the system. Fuzzy variable structure is a hybrid controller that uses fuzzy logic to eliminate chattering phenomenon that is inherent to a sliding-mode variable structure control system. Because the designed fuzzy controller in this paper is a single-input and single-output controller, and the corresponding fuzzy control rules are few, so the approach is very simple for real-time implementation. At last, the control method is verified by computer simulations, based on the dynamics model of a two-link flexible manipulator. Simulation results indicate that the control system exhibits perfect control effects on chattering-reducing and trajectory-tracking.

关键词： Fuzzy control Trajectory Sliding mode control control systems Manipulator dynamics Fuzzy systems Fuzzy logic control system synthesis Computer simulation Computational modeling

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Recapitalizing the Navy through optimized manning and improved reliability

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NAVAL ENGINEERS JOURNAL 1998年第6期110卷 61-72页

作者： Anderson, DE Malone, TB Baker, CC Mr. David E. Anderson:is a Navel Engineer with the Naval Sea Systems Command where he is currently assigmd to the HumanSystems Integration branch. Mr Anderson has a Bachelor of Science degree an Environmental Engineering from Flurida Technological University and a Master's in Environmental Engiwering from the University of Central Flurida. He currentEy is an HSI manager for a number oflvay R&D and skig acquisition efforts. Dr. Thomas B. Malone:received a Ph.D. in Experimental Psychology from Fordham University in 1964. He is President of Carlow International Incorporated an organization dedicated to human factors research and development with emphasis an mantime systems. He has directed over 350 programs and projects in his 33 year career and is responsible for overall management of all contract programs within the Corporation. He is a Past President of the Human Factors and E r g m i c s Society (HFES) of which he is a Fellow. He is also a Fellow of the Washington Academy of Sciences He was selected as a member of the N A S Space Sciences Technical Advisuiy Committee on Technoloo Requirements for Human Performance on Long Duration Space Missions in 2989 and 90. He was elected as the First Chair of the Systems Development Technical Group of the HFES. Dr Malone is currently managing eflorts to devehp and auto- mate standardized processes for canducting human systems integration (HSI) in the military weapon systems acquisition process and fov developing automated tools to facilitate fledormance of specific steps in the HSI process. Dr Malone also is currently occupied in applying human engineering to the DD 21 and is serving as the Chair ofthe System ManninglHuman Perfomzance Working IPT under the DD 21 ManninglHSI IPT chaired ty PMS 500M. Mr. Clifford Baker:has over 20 years experience in developing and applying human factors technology to complex systems. He holds a masters degree in psychology with a specialization in human factors engineering and he is a Board Certified Human Factors Engineering Profesional

Reduced manning is the process (and the result) of removing human functions from a system while retaining or improving system operability and effectiveness. Reliability and maintainability characterize a system's operability and effectiveness. Reduced manning impacts system reliability by changing the characteristics of (1) human error associated with system operation and maintenance, (2) time to repair failed components, and (3) mean-time-between-failures (MBTF) in a reduced manning environment. Simply reducing manning without compensating for system dependence on human involvement generally has a negative impact on system maintainability. Methods to address this include (1) human-system integration design of maintenance interfaces and (2) design of operations activities that are closely related to device failures. After demonstrating reliable performance through testing and operation, ship commanders can be assured that fewer people can effectively operate and maintain Navy ships and systems.

关键词： Naval vessels

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Developing a prototype concurrent design tool for composite topside structures

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NAVAL ENGINEERS JOURNAL 1997年第3期109卷 279-290页

作者： Dirlik, S Hambric, S Azarm, S Marquardt, M Hellman, A Bartlett, S Castelli, V Steve Dirlik:began his career at the Naval Surface Warfare Center Carderock Division in 1981 as an aerospace engineer co-op student. He completed his bachelor of science degree in aeropace and ocean engineering from Virginia Polytechnic Institute and State University in 1985 and his master of science degree in aerospace engineering from the University of Maryland in 1990. Mr. Dirlik recently completed a master of science program in applied physics at The Johns Hopins University and currently works in the Radar Cross Section and Target Physics Branch of the Signatures Directorate at the Naval Surface Warfare Center Corderoke Division. He has worked on Navy low observable programs since 1990. Stephen Hambric:is a research associate at the Applied Research Laboratory at The Pennsylvania State University. He received his B. S. and M.S. degree in mechanical engineering from Virginia Polytechnic Institute and State University and his D. Sc. in mechnical engineering from the George Washington University. He has worked on several computer aided multidiscikplinary design and optimization projects over the years including an automated propeller design system and a structural acoustic optimization capability. Dr. Shpour Azarm:is currently working as an associate professor with the Design and Manufacturing Group of the Department of Mechanical Engineering at the University of maryland at College Park. Dr Azarm's expertise is in the areas of optimization-based designed and concurrent design and optimization of multidisciplinary systems. He was a consultant at Black & Decker Corporation (summer 1996) and worked as a Navy senior summer faculty fellow (summer 1995) and a NASA summer faculty fellow (summer 1994). He was a visiting scientist at NASA Langley Research Center for Multidisciplinary Analysis and Applied Structural Optimzatiom at the University of Siegen in Germany (spring 1992) and the Design Institute of the Technical University of Denmark (summer 1990). Dr Azarm was an associate technical editor of the ASME Jour

A prototype concurrent engineering tool has been developed for the preliminary design of composite topside structures for modern navy warships. This tool, named GELS for the Concurrent Engineering of Layered Structures, provides designers with an immediate assessment of the impacts of their decisions on several disciplines which are important to the performance of a modern naval topside structure, including electromagnetic interference effects (EMI), radar cross section (RCS), structural integrity, cost, and weight. Preliminary analysis modules in each of these disciplines are integrated to operate from a common set of design variables and a common materials database. Performance in each discipline and an overall fitness function for the concept are then evaluated. A graphical user interface (GUI) is used to define requirements and to display the results from the technical analysis modules. Optimization techniques, including feasible sequential quadratic programming (FSQP) and exhaustive search are used to modify the design variables to satisfy all requirements simultaneously. The development of this tool, the technical modules, and their integration are discussed noting the decisions and compromises required to develop and integrate the modules into a prototype conceptual design tool.

关键词： Warships

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Affordability, logistics R&D and fleet systems

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NAVAL ENGINEERS JOURNAL 1996年第3期108卷 199-213页

作者： Schulte, DP Skolnick, A He has supported the development and operation of several naval systems including advanced component selection for Trident II fire control and navigation systems. He served as branch manager of the Surface Ship ASW Combat System Branch which acted as the acquisition engineering agent for the AN/SQQ-89 Surface Ship Anti-Submarine Warfare Weapon System. He was then selected to manage the Module Engineering Department which provided engineering support to numerous naval systems including the AN/BSY-1 Submarine Combat System and the Trident II fire control and navigation system. He then served as the deputy program manager for NAVSEA Progressive Maintenance (2M/ATE). He holds a B.S. degree in Electrical Engineering from Purdue University and currently is pursuing a Maste's degree in Public Environmental Affairs at Indiana University—Purdue University Indianapolis. He served at Applied Physics Laboratory/The Johns Hopkins University in missile development then aboard USS Boston (CAG-1) and played leading roles in several weapon system developments (Regulus Terrier Tartar Talos) inertial navigation (Polaris) deep submergence (DSRV) and advanced ship designs (SES). He later was director Combat System Integration Naval Sea Systems Command and head Combat Projects Naval Ship Engineering Center. He led the Navy's High Energy Lasers and Directed Energy Weapons development efforts. He was vice president advanced technology at Operations Research Inc. and vice president maritime engineering at Defense Group Inc. before starting SSC in 1991. Dr. Skolnick holds a B.S. degree in Mathematics and Economics Queens College an M.A. degree in Mathematics and Philosophy Columbia University an M.S. degree in Electrical/Aeronautical Engineering U.S. Naval Postgraduate School and a Ph.D. in Electrical Engineering and Applied Mathematics from Polytechnic University in New York. He is the author of many published papers on engineering design issues source selection procedures and large-scale complex technology problems

The Fleet continues to require high performance systems that can operate with dependability in the seas' unforgiving environments and under hostile action. Those demands are not new. What has changed is the urgent priority formerly assigned to national defense issues. The arguments for continued superpower military strength are now roiled in politics along with unsettled budgets and uncertain force level projections. Current expectations revolve about indefinite fiscal and operational issues (difficult funding constraints and broadband threats). In the actual event of ''doing more with less,'' a practical response is to apply the creative power available from sound engineering judgement and the crucible of experience to the immediate needs of the Fleet. The attempt to shorten the path between advanced development effort and Fleet use has been tried occasionally in the past, often, without exemplary results. The Sustainable Hardware and Affordable Readiness Practices (SHARP) program, is a generic R&D effort under OpNav sponsorship that has been working steadily on sensible solutions to product engineering problems. Armed today with fast-time, large-scale computation abilities and modern tools for technical problem solving coupled with specialized engineering knowledge, it has been refreshed and is underway satisfying existing Fleet needs. The relationship between fully responsive engineering services and current operational needs is always demanding. The connection between advanced engineering development (6.3 category funds) and immediate Fleet usage brings added complexity and challenge, both technical and organizational. Illustrative examples of affordable engineering solutions to ''retain, revise, replace or retire'' questions are presented within the context of both Fleet realities and budgetary limitations. The discussion covers legacy system support, civil/military considerations and Fleet maintenance issues. It describes the substantial and critical payoffs i

关键词： Warships

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ACQUISITION REFORM AND BEST PRODUCT PROCUREMENT - AN ENGINEERING VIEW

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NAVAL ENGINEERS JOURNAL 1994年第6期106卷 41-57页

作者： FISHER, DA SKOLNICK, A He has been involved with several weapon system developments. Among these were the Trident II fire control and navigation systems the BSY-I Anti-Submarine Warfare System and the Navy standard computers (UYK44 and EMSP). He served as manager of the Digital Circuits Engineering Branch and was then appointed as manager of the Automatic Test Equipment (ATE) Technology Division. As manager of the ATE Technology Division he was responsible for the SP-23 Fire Control System Support Project the SP-24 Navigation Project and the Fleet Progressive Maintenance Program (2M/ATE). This Division was responsible for selection and application of electronic product technology and for developing fleet test and repair techniques. He holds a B.S. in Electrical Engineering from the University of Evansville and is currently pursuing a Masters of Public Administration at Indiana University-Purdue University Indianapolis. Dr. Alfred Skolnick:retired from the Navy in 1983 with the rank of captain. He is president of System Science Consultants (SSC) specializing in strategic planning technical program definition technology assessment and engineering analyses on selected matters of national interest. Dr. Skolnick taught mathematics and management sciences at University of Virginia and Marymount University. He is adjunct faculty at Northern Virginia Community College. From 1985 to 1989 he was president of the American Society of Naval Engineers. In the Navy he served at Applied Physics Laboratory/The Johns Hopkins University then aboard USSBoston(CAG-1) and played leading roles in several weapon system developments inertial navigation (Polaris) deep submergence (DSRV) and advanced ship designs (SES). He later was director Combat System Integration Naval Sea Systems Command and head Combat Projects Naval Ship Engineering Center. In 1975 he became a major project manager and led the Navy's High Energy Lasers Program in 1981 he was assigned all Navy Directed Energy Weapons development efforts. He was vice president advanced tech

The military services are being moved in the direction of performance-based specifications and standards. They are being steered against dictating ''how to'' produce an item since such action forecloses on the ability to gain access to components or technology that may have a commercial equivalent. Why should the engineering community embrace the new approach? Aside from the obvious weight of it being approved policy, therefore currently mandated, it warrants examination because it is the correct approach at this time when applied to appropriate products. Military specifications and standards are to be displaced then, by acceptable alternative contractor design solutions. Industry bidders will be allowed to propose the particular design details, permitting procurement flexibility by contractually citing only system level or interface requirements, both physical and functional. Hopefully, this can broaden the industrial base and increase competition with reduced costs to follow. Conceptually, the approach appears both performance-sensible and cost-attractive (there are, of course, consequent risks) but how does implementation proceed? Is it possible to pursue the goals envisioned along paths that are not in themselves experimental? Can the American postulate, minimal loss of life and limb to U.S. military people, continue to be honored? Experience and track record elsewhere imply encouraging possibilities in select situations-useful prospects are identified and discussed in practical terms.

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CHROMATOGRAPHIC GEL MEDIA FOR LARGE-SCALE PROTEIN-PURIFICATION

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BIO-technology 1984年第1期2卷 41-&页

作者： COONEY, JM John M. Cooney Ph.D. was a manager in the Large Scale Chromatography Unit of Pharmacia Fine Chemicals AB Uppsala Sweden. He is a consultant with W.P.C. Associates and will be joining Fermentech Ltd. Storey's Gate Westminster London SW1P 3AY U.K.REFERENCES Sumner J.B.1951. Urcase p. 873-892. In:The Enzymes Part 2. J.B. Sumner and K. Myrb&auml ck (eds.). Academic Press New York.Martin A.J.P. and Synge R.L.M.1945. Analytical chemistry of the proteins p. 1-83. InAdvances in Protein Chemistry Vol. 2. M.L. Anson and J.T. Edsall (eds.). Academic Press New York.Fankuchen I.1945. X-ray diffraction and protein structure p. 387-405. InAdvances in Protein Chemistry Vol. 2. M.L. Anson and J.T. Edsall (eds.). Academic Press New York.Tristram G.R.1949. Amino acid composition of purified proteins p. 83-153. InAdvances in Protein Chemistry Vol. 5. M.L. Anson J.T. Edsall and K. Bailey (eds.). Academic Press New York.|ISI|Sanger F.1952. The arrangement of amino acids in proteins p. 1-67. InAdvances in Protein Chemistry Vol. 7. M.L. Anson K. Bailey and J.T. Edsall (eds.). Academic Press New York.Tristram G.R.1953. The amino acid composition of proteins p. 181-233. InThe Proteins Vol. 1A. H. Neurath and K. Bailey (eds.). Academic Press New York.Low B.W.1953. The structure and configuration of amino acids peptides and proteins p. 235-391. InThe Proteins Vol. 1A. H. Neurath and K. Bailey (eds.). Academic Press New York.Sanger F.1949. Fractionation of oxidized insulin. Biochem. J.44: 126-128.|ISI|ChemPort|Sanger F. and Tuppy H.1951. The amino acid sequence in the phenylalanyl chain of insulin. 1. The identification of lower peptides from partial hydrolysates. Biochem. J.49: 463-481.|PubMed|ISI|ChemPort|Sanger F. and Tuppy H.1951. The amino acid sequence in the phenylalanyl chain of insulin. 2. The investigation of peptides from enzymic hydrolysates. Biochem. J.49: 481-490.|PubMed|ISI|ChemPort|Sanger F. and Thompson E.O.P.1953. The amino acid sequence in the glycyl chain of

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