This paper describes the state-of-the-art ultrasonic and magnetic measuring techniques developed at Kawasaki Steel and used in the production proc.ss of steel sheets. Some examples shown here are as follows: (1) Magne...
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This paper describes the state-of-the-art ultrasonic and magnetic measuring techniques developed at Kawasaki Steel and used in the production proc.ss of steel sheets. Some examples shown here are as follows: (1) Magnetic flux leakage testing system for the detection of nonmetallic inclusions, (2) Nondestructive orientation measurement for secondary re-crystallized grains in grain-oriented electrical steel by ultrasonic interferometry, (3) Immersion testing method for the detection of nonmetallic inclusion, and (4) Surface wave probe for the detection of surface flaws in rolls used in rolling mills. The development of these techniques and their applications to actual steel sheets production proc.sses have contributed to advances in quality assurance and control. By means of these techniques, steel sheet products with advanced and uniform properties are being continuously produced to meet customers' needs.
Kawasaki Steel has been making efforts to develop new hot-rolled steel products by using fully continuous rolling technology, so-called `endless rolling', at No. 3 hot strip mill of Chiba Works. Stable rolling tec...
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Kawasaki Steel has been making efforts to develop new hot-rolled steel products by using fully continuous rolling technology, so-called `endless rolling', at No. 3 hot strip mill of Chiba Works. Stable rolling technology of ultra-thin hot rolled strips such as 1.0 mm, 0.9 mm, and 0.8 mm in thickness has been established, and the conventional minimum gauge of hot rolled strips (1.2 mm) has been lowered. The ultra-thin hot rolled strips have been provided to the market with a brand name `RTHC' (River thin hot coil commercial grade) since 1977. The ultra-thin hot rolled strips have excellent quality in dimensional accuracy and mechanical properties. In addition, the ultra-thin hot rolled strips meet current needs of energy saving and reducing CO2 emission. New market and more demands for the newly developed product strips are expected.
No. 3 hot strip mill in Chiba Works of Kawasaki Steel started its operation in May 1995. The mill meets the strict quality requirements of customers in recent years and expands the product size of stainless steel. The...
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No. 3 hot strip mill in Chiba Works of Kawasaki Steel started its operation in May 1995. The mill meets the strict quality requirements of customers in recent years and expands the product size of stainless steel. The dimensional and surface quality of stainless steel at No. 3 hot strip mill further advanced by introducing highly accurate and high-response thickness gauge control, set-up and dynamic control for optimizing crown and flatness at pair cross mill, equipped with on-line roll grinder, and edge-seam control. (1) Product size of hard steel strips such as stainless steel has been expanded and high accuracy in longitudinal thickness has been achieved over the full length of hot rolled strips. (2) Low crown of stainless steel has been able to be obtained by developing highly accurate crown and flatness control. (3) Reduction of the edge-seam defects of stainless steel has been developed by using the sizing press.
Document images belong to a unique class of images where the information is embedded in the language represented by a series of symbols on the page rather than in the visual objects themselves. Since these symbols ten...
Document images belong to a unique class of images where the information is embedded in the language represented by a series of symbols on the page rather than in the visual objects themselves. Since these symbols tend to appear repeatedly, a domain-specific image coding strategy can be designed to facilitate enhanced compression and retrieval. In this paper we describe a coding methodology that not only exploits component-level redundancy to reduce code length but also supports efficient data access. The approach identifies and organizes symbol patterns which appear repeatedly. Similar components are represented by a single prototype stored in a library and the location of each component instance is coded along with the residual between it and its prototype. A representation is built which provides a natural information index allowing access to individual components. Compression results are competitive and compressed-domain access is superior to competing methods. Applications to network-related problems have been considered, and show promising results.
作者：
Pfeufer, TInstitute of Automatic Control
Lab. Contr. Eng. and Proc. Automat. Darmstadt University of Technology D-64283 Darmstadt Landgraf-Georg. Str. 4 Germany
The increased degree of automation of technical proc.sses requires an increased number of mechanical-electronic components. In order to maintain the dependability and availab.lity despite of the increased complexity, ...
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The increased degree of automation of technical proc.sses requires an increased number of mechanical-electronic components. In order to maintain the dependability and availab.lity despite of the increased complexity, new methods for the quality assurance of mechanical-electronic systems are necessary. This paper describes an automatic diagnostic system for an automotive actuator. Analytic models of the proc.ss under investigation are used in order to extract detailed information about the proc.ss, using only the usually measured signals and evaluating the signals e.g. by parameter estimation and state estimation. However, some relations, especially the cause - effect relations between the underlying faults and the observable symptoms, are quite difficult to represent by analytic models. A rule-based approach is more suitable to acquire, represent and proc.ss the diagnostic knowledge base. In order to cope with uncertainty, a fuzzy structure is applied to the classification of faults. Copyright (C) 1997 Elsevier Science Ltd.
After a short overview of the historical development of model-based fault erection, some proposals for the terminology in the field of supervision, fault detection and diagnosis are stated, based on the work within th...
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After a short overview of the historical development of model-based fault erection, some proposals for the terminology in the field of supervision, fault detection and diagnosis are stated, based on the work within the IFAC SAFEproc.SS Technical Committee. Some basic fault-detection and diagnosis methods are briefly considered. Then, an evaluation of publications during the last 5 years shows some trends in the application of model-based fault-detection and diagnosis methods.
Kawasaki Steel started the operation of the No. 3 hot strip mill at its Chiba Works in May 1995. This is the first fully continuous hot strip mill in the world. To satisfy customer demands for the improvement of produ...
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Kawasaki Steel started the operation of the No. 3 hot strip mill at its Chiba Works in May 1995. This is the first fully continuous hot strip mill in the world. To satisfy customer demands for the improvement of product qualities, the mill has the following features: (1) A high skid button was installed in reheating furnace to remove skid marks. (2) High speed proc.ssing, hydraulic edgers and long side guides were introduced in rougher mill. (3) A pair cross mill, a hydraulic screw down, an AC motor-drive and a low inertia looper were installed in finisher mill. (4) Subdivided control valves were installed in water cooling zone. These arrangements are controlled precisely and thus, improved product accuracy in strip gauge, crown and width and the quality of the material.
A new distributed parameter stochastic model is introduced for modelling a large-scale wastewater treatment system with distributed water feeding, sludge recycling and removal. The state estimation problem is formulat...
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A new distributed parameter stochastic model is introduced for modelling a large-scale wastewater treatment system with distributed water feeding, sludge recycling and removal. The state estimation problem is formulated as a biomass and organic matter profile estimation problem for the aeration basin. It is solved by approximation of the original model with a finite-dimensional bilinear model and the filtration distribution with the normal distribution. It is shown that the profile can be estimated online using dissolved oxygen and gas analysis results measured from several points over the aeration basin. The estimation quality is higher in the case of a large-scale aeration basin than in the case of a completely mixed basin. The estimation algorithm is obtained in a computationally effective form. The model and the estimation algorithm are tested in a simulation experiment. It is demonstrated that the sludge and water distribution has a strong effect on treated water quality. The distribution is considered as a new control parameter. It can be used in practice for improvement of treatment proc.ss quality.
作者：
BULL, DNDaniel N. Bull
Ph.D. is a consultant in fermentation technology and president of Satori Corporation P.O. Box 1730 Montclair N.J. 07042. (201) 783-9787.REFERENCES Graff G.M. Short H. and Keene J.1983. Gene-splicing methods move from lab to plant. Chem. Eng.90: 22-27.|ISI|Broda P.1979. p. 1-3. Plasmids. W. H. Freeman Oxford and San Francisco.Donoghue D.J. and Sharp P.A.1978. Construction of a hybrid bacteriophage-plasmid recombinant DNA vector. J. Bact.136: 1192-1196.|PubMed|ISI|ChemPort|Bok S.H. Hoppe D. Mueller D.C. and Lee S.E.1983. Improving the production of recombinant DNA proteins through fermentation development. Abstract from 186th ACS Natl. Mtg. Washington D.C. Sept. 1.Maniatis T. Fritsch E.F. and Sam-brook J.1982. p. 88. Molecular Cloning. Cold Spring Harbor Laboratory. Guidelines for research involving recombinant DNA molecules June 1983
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