Long-range predictive controllers for discrete-time MIMO bilinear processes are derived based on a new bilinear model with integral action. Using this model a multi-step-ahead optimal predictor is derived. Two alterna...
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Long-range predictive controllers for discrete-time MIMO bilinear processes are derived based on a new bilinear model with integral action. Using this model a multi-step-ahead optimal predictor is derived. Two alternative solution methods - rigorous and shortcut - of the minimization problem of a long-range objective function are established and used to calculate control inputs. Several simulation results show that the proposed control methods have robustness to the limited a priori knowledge of the process. Dynamic simulation on dual composition control of a binary distillation process showed satisfactory servo and regulatory performances of the proposed algorithms.
Observability and controllability aspects of a continuous pilot scale crystalliser are discussed. Both are major requirements for control system design. The proposed control system uses the crystal size distributions ...
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Observability and controllability aspects of a continuous pilot scale crystalliser are discussed. Both are major requirements for control system design. The proposed control system uses the crystal size distributions (CSD), observed by on-line sensors, based on the method of forward light scattering, as inputs, and the rate of withdrawal of fine and large crystals from the crystalliser as outputs. A set of robust parameters is derived to describe the location and spread of the CSD. A statistical measure to validate the quality of the measurements is also derived which enhances filtering capabilities. Experimental results show good observability and reproducibility of CSD dynamics, and a sufficiently strong correlation of process inputs and outputs.
A method is presented to assess the impact of disturbances on plant economic performance. The method is suitable for use during process design, and can be used to help evaluate alternative process structures or altern...
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The steady-state interaction measure of dual composition control schemes for binary distillation columns is examined under the assumptions of constant relative volatility and constant molar overflow. An exhaustive enu...
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The steady-state interaction measure of dual composition control schemes for binary distillation columns is examined under the assumptions of constant relative volatility and constant molar overflow. An exhaustive enumeration is made of the control schemes that use column flows or their ratios as manipulated variables and product compositions as the controlled variables. Using a redundancy criterion, it is shown that 34 classes of dual composition control schemes have independent values for the interaction measure. This number reduces to 17 when the feed is a saturated liquid or gas. For high purity columns, the interaction measure of the above 34 control schemes approaches the values for the (L, V), (D, V), and (L3) control schemes. In this case none of the control schemes has a desirable interaction measure.
作者：
ZABORSKY, OROskar R. Zaborsky
Ph.D. is a program director in the Division of Chemical and Process Engineering of the National Science Foundation 1800 G Street Washington DC 20550. The views conclusions and recommendations expressed herein are those of the author and do not necessarily reflect the views and policies of the National Science Foundation.REFERENCES Conference on "Genetic Control of Environmental Pollutants" July 31-August 3 1983 University of Washington School of Public Health & Community Medicine and Department of Environmental Health Seattle WA. The proceedings are to be published by Plenum Press.Recent reports covering the handling of hazardous industrial wastes including biological processes are (a) "Management of Hazardous Industrial Wastes: Research and Development Needs" National Research Council National Academy Press Washington D.C. 1983 (b) "Technologies and Management Strategies for Hazardous Waste Control
" Congress of the United States Office of Technology Assessment Washington D.C. 1983.An expanded report on the technology market analysis regulatory and legislative factors dealing with biotechnology applications to hazardous wastes has been produced by Dr. Thomas O.Peyton AmTech Consultants Vienna VA for the OTA study.Baross J.A. and Deming J.W.1983. Growth of 'black smoker' bacteria at temperatures of at least 250C. Nature303: 423-426.|Article|ISI|ChemPort|
作者：
KORWEK, ELEdward L. Korwek
Ph.D. J.D. is associated with the law offices of Keller and Heckman 1150 17th St. N.W. Washington D.C. 20036.REFERENCES Committee on Recombinant DNA "Potential Biohazards of Recombinant DNA Molecules" Nature250: 175 (1974) Proc. Nat. Acad. Sci.71: 2593 (1974)Science185: 303 (1974).|Article|Fed. Regist.48: 24556 (1983).Milewski
E. Editor's Note. Recombinant DNA Tech. Bull.4: i (1981).Inside EPA 4 1 (1983). EPA has already held a meeting and published a draft report on the subject of its regulation of this area under the TSCA. EPA "Administrator's Toxic Substances Advisory Committee Meeting"
Fed. Regist.48: 8342 (1983) Regulation of Genetically Engineered Substances Under TSCA
Chemical Control Division Office of Toxic Substances Office of Pesticides and Toxic Substances Environmental Protection Agency Washington D.C. (March 1982). Congress also recently held a hearing on the subject of existing federal authority over the release of R-DNA-containing organisms into environment. M. Sun Science221: 136 (1983).Sects. 2-30 15 U.S. Code sects. 2601-2629 (1976 and Supp. V 1981). Hereinafter all references in the text to TSCA refer to the section numbers as enacted and not to the corresponding U.S. Code sections.The Administrative Procedure Act specifically states that the reviewing court shall "hold unlawful and set aside agency action findings and conclusions found to be hellip in excess of statutory jurisdiction
authority or limitations or short of statutory right. hellip " 5 U.S. Code
sect. 706(2)(C) (1976).PHS Act 42 U.S. Code sects. 217a and 241 (1976) Charter
Recombinant DNA Advisory Committee Department of Health and Human Services (1982).Korwek E. Food Drug and Cosm. L. J.35: 633 (1980) p. 636.Although DHHS has some authority under Section 361 of the PHS Act to regulate R-DNA materials that cause human disease and are communicable most types of experimentation would not fall into this category. Because of this limitation the Sub committee of the Federal
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