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A CRITERION FOR THE PARTIAL STABILITY OF LINEAR SYSTEMS WITH CONSTANT COEFFICIENTS 被引量:1
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作者 黄力民 《Chinese Science Bulletin》 SCIE EI CAS 1985年第11期1553-1554,共2页
Consider n order linear systems with constant coefficients (?)= Tx or (?)= Ay + Bz, (?)=Cy+ Dz, (1)where y∈ R^m, z∈R^p,m + p=n, T,A,B, C, D are constant matrixes. Partial stability of systems (1) can be distinguishe... Consider n order linear systems with constant coefficients (?)= Tx or (?)= Ay + Bz, (?)=Cy+ Dz, (1)where y∈ R^m, z∈R^p,m + p=n, T,A,B, C, D are constant matrixes. Partial stability of systems (1) can be distinguished from finding directly the 展开更多
关键词 distinguished finding 五石 八镇 古印 二护 云一 丽丽 九死
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A NEW RESULT ON SOLUTION OF THE MATRIX EQUATION A^TB+BA=-C ABOUT THE PARTIAL STABILITY 被引量:1
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作者 黄力民 《Chinese Science Bulletin》 SCIE EI CAS 1988年第23期2003-2004,共2页
Consider Lyapunov matrix equation ATB + BA=—C, (1) where A, B, C∈Rn×n, BT=B, CT=C. If the eigenvalues of A do not
关键词 satisfy LETTER KRONECKER ELEMENTARY JORDAN definite
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A NEW TYPE OF DISTRIBUTARY CHANNEL DEPOSITS IN COAL-BEARING STRATA OF NAYONG AREA, GUIZHOU PROVINCE
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作者 马维俊 《Chinese Science Bulletin》 SCIE EI CAS 1990年第5期393-396,共4页
Considerable progresses in the sedimentologic studies of the anastomosing river models have been made in recent years. There are now many modern and ancient examples such as those described by Smith, Rust et al. Flore... Considerable progresses in the sedimentologic studies of the anastomosing river models have been made in recent years. There are now many modern and ancient examples such as those described by Smith, Rust et al. Flores et al. But all examples are found in the alluvial plains and the intermontane basins. None is known reporting about the upper delta plain environment. However, this type of distributary channels 展开更多
关键词 anastomosing-distributary channels DEPOSITIONAL features delta plain coal-bearing strata.
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ON THE PARTIAL STABILITY OF DISCRETE LINEAR SYSTEMS WITH CONSTANT COEFFICIENTS
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作者 黄力民 《Chinese Science Bulletin》 SCIE EI CAS 1991年第19期1663-1664,共2页
We study the partial stability for variables x<sub>1</sub> , x<sub>2</sub>, …, x<sub>m</sub> (m【n)of a discrete system: x(τ+1)=Tx(τ) (1)
关键词 风刀 EIGENVALUE satisfy eater ystem assoc
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EXISTENCE OF QUADRATIC FORMS AS V-FUNCTION OF A STABLE SYSTEM
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作者 黄力民 《Chinese Science Bulletin》 SCIE EI CAS 1990年第17期1493-1495,共3页
Consider Lyapunov Matrix equation and the linear autonomous system Let the equilibrium of (2) be stable and the matrix C be positive semidefinite. In this let-
关键词 AUTONOMOUS SOLVABLE itself definite
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ON THE CHARACTERISTIC FEATURES OF THE BAOHETANG COAL FROM MIDDLE HUNAN
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作者 钟建华 王文样 +1 位作者 王钟秀 易改危 《Chinese Science Bulletin》 SCIE EI CAS 1991年第3期221-223,共3页
Ⅰ. INTRODUCTIONThe coal mine of Baohetang is located in Shaodong County, Hunan Province. The Longtan group, up to 220 m in thickness, contains 4 coal seams, and the lower 2 seams, generally speaking, are not suited f... Ⅰ. INTRODUCTIONThe coal mine of Baohetang is located in Shaodong County, Hunan Province. The Longtan group, up to 220 m in thickness, contains 4 coal seams, and the lower 2 seams, generally speaking, are not suited for mining, whereas the upper 2 seams are recoverable, thicknesses of which are separately 0.60 m and 1.19 m on an average. The results of the 展开更多
关键词 Baohetang SAPROPEL groundmass exsudatinite.
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DOMAINS OF QUASIDISK TYPE IN THE PLANE AND THE LOGARITHMIC DERIVATIVE PROPERTY
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作者 谭海鸥 《Chinese Science Bulletin》 SCIE EI CAS 1988年第10期872-,共1页
In the following, D will denote a finite connected domain in (?) of hyperbolic type; F(D) is the family of f which is analytic and f’≠0 in D; M is the family of M(?)bius transformations. If f∈F(D), we set T... In the following, D will denote a finite connected domain in (?) of hyperbolic type; F(D) is the family of f which is analytic and f’≠0 in D; M is the family of M(?)bius transformations. If f∈F(D), we set Tf(z)=f'(z)/f’(z); ||Tf||D=sup[Tf(z)|ρD-1(z), where ρD(z) is the hyperbolic metric of D. Let σ(D)={a:z∈D f∈F(D) and ||Tf||D<a(?)f is univalent in D}; τ(D)={a:f∈F(D), φ∈M and ||Tf—Tφ||D<a(?)f is univalent in D}. Finally, D is said to be a domain 展开更多
关键词 HYPERBOLIC ANALYTIC CONNECTED
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