Browsing by Author "LIN, JJ"

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ELECTRICAL TRANSPORT AND SUPERCONDUCTIVITY IN THE AU-BI2SR1.8CA1.2CU2OY COMPOSITE SYSTEM
(1992-02-15)
LIN, WY
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LIN, JJ
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CHEN, TM
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應用化學系
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Department of Applied Chemistry
We have measured the resistivity-rho of the Au-Bi2Sr1.8Ca1.2Cu2Oy composite system with Au volume fraction p(Au) ranging from 0.00 to 1.00. We find, for the samples with p(Au) less-than-or-equal-to 0.4, that the addition of Au does not disturb the superconducting transition temperature of Bi2Sr1.8Ca1.2Cu2Oy. For the samples with p(Au) greater-than-or-equal-to 0.6, no zero-resistivity state is observed. The variation of rho(300 K) with p(Au) indicates a three-dimensional percolating Au matrix occurring at p(Au) almost-equal-to 0.18.
ELECTRICAL TRANSPORT IN THE AG-BI2SR1.8CA1.2CU2OY COMPOSITE SYSTEM
(1991-07-15)
LIN, JJ
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CHEN, TM
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應用化學系
;
Department of Applied Chemistry
We have measured the resistivity of the Ag-Bi2Sr1.8Ca1.2Cu2O(y) composite system with Ag volume fraction p(Ag) ranging from 0.00 to 1.00. We find, for the samples with p(Ag) < 0.6, that the addition of Ag slightly decreases the superconducting transition temperature of Bi2Sr1.8Ca1.2Cu2O(y). For the samples with p(Ag) > 0.6, no zero-resistivity state is observed. The variation of the room-temperature resistivity with p(Ag) indicates a three-dimensional percolating Ag matrix occurring at p(Ag) almost-equal-to 0.17.
PARAMETRIC MULTIPLE EIGENVALUE SHIFTING WITH MINIMUM EIGEN-VALUE SENSITIVITY VIA STATE-FEEDBACK BASED ON BLOCK SCHUR FORM
(1994-09-01)
LIN, JJ
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WU, YC
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電控工程研究所
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Institute of Electrical and Control Engineering
Based on the block Schur form of an open-loop system matrix, a new sequential design procedure is proposed for characterizing an explicit parametric class of linear state-feedback controllers for the open-loop system, which will shift an arbitrary prescribed spectrum of distinct self-conjugate multiple eigenvalues to the closed-loop system. We also consider the problem of minimizing the sensitivity of the shifted closed-loop multiple eigenvalues with respect to parameter variations in all elements of the closed-loop plant matrix. An insightful parameterization of the desirable closed-loop multiple eigenvalue sensitivity is provided through the explicit parametric class of linear state-feedback controllers. Based on this parameterization, a least square method for designing a state-feedback gain matrix which shifts a desirable set of distinct closed-loop multiple eigenvalues, such that these multiple eigenvalues have minimum sensitivity to perturbation in the closed-loop plant matrix, is presented. A numerical example is worked out to illustrate the design procedures.
PERCOLATION AND ELECTRICAL-RESISTIVITY IN THE YBA2CU3O7-AG COMPOSITE SYSTEM
(1990)
LIN, JJ
;
CHEN, TM
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應用化學系
;
Department of Applied Chemistry
PERCOLATION BEHAVIOR IN A YBA2CU3O7-AG COMPOSITE SYSTEM
(1990-08-01)
LIN, JJ
;
CHEN, TM
;
應用化學系
;
Department of Applied Chemistry
STRUCTURAL AND SUPERCONDUCTING PROPERTIES OF YBA2(CU1-XAGX)3O7 WITH X-LESS-THAN-OR-EQUAL-TO-0.20
(1990-12-01)
LIN, JJ
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CHEN, TM
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CHEN, YF
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應用化學系
;
Department of Applied Chemistry
SUPERCONDUCTING PROPERTY AND STRUCTURE STUDIES OF YBA2CU3O7-AG2O COMPOSITES
(1990-03-01)
LIN, JJ
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CHEN, TM
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YAO, YD
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CHEN, JW
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GOU, YS