The Time Series Weight－changing Grey Incidence Analysis of the Development of Agricultural Mechanization in China

ＴｈｅＴｉｍｅＳｅｒｉｅｓＷｅｉｇｈｔ－ｃｈａｎｇｉｎｇＧｒｅｙＩｎｃｉｄｅｎｃｅＡｎａｌｙｓｉｓｏｆｔｈｅＤｅｖｅｌｏｐｍｅｎｔｏｆＡｇｒｉｃｕｌｔｕｒａｌＭｅｃｈａｎｉｚａｔｉｏｎｉｎＣｈｉｎａ￥ＳＵＮＷｅｉ（ＣｈａｎｇｃｈｕｎＴａｘａｔｉｏｎｉ...     

GLOBAL PHASE-PORTRAITS OF PLANEHOMOGENEOUS POIYNOMIAL VECTOR FIELDSAND STABILITY OF THE ORIGIN

1.IntroductionT.Dated]obtainedanalgebraicclassificationofplanehomogeneousquadraticvectorfields,A.Cima[2]gaveanalgebraicandtopologicalclassificationofhomogeneouscubicvectorfieldsintheplane.Theirmethodswerebasedontheclassificationofforth-orderbinaryformsdev…     

Robust Adaptive Pole Asignment Design

ＲｏｂｕｓｔＡｄａｐｔｉｖｅＰｏｌｅＡｓｉｇｎｍｅｎｔＤｅｓｉｇｎＷａｎｇＸｉｕｈｏｎｇＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＹａｎｔａｉＴｅａｃｈｅｒｓＣｏｌｅｇｅ，Ｙａｎｔａｉ，２６４０２５ＴｈｅＰｒｏｊｅｃｔｉｓＳｕｐｐｏｒｔｅｄｂ...     

SYNTHESIS OF PLASTIC PIGMENT WITH MULTIHOLLOW STRUCTURE

INTRODUCTIONIn recent years, seeded emulsion polymerization was often used to synthesis polymer/polymer composite particles used in many industrial field, such as in painting, print, coating and so on. Moreover, recently ,attention has been focused on the latex particle possessing hollow structure(1～4). For example, P(St -MAA) polymer particles was changed to those having hollow structure by alkali treatment, following by being cooled to room temperature, which was named as alkali/cool…     

Feed back Mechanism in Decision Support Systems

ＦｅｅｄｂａｃｋＭｅｃｈａｎｉｓｍｉｎＤｅｃｉｓｉｏｎＳｕｐｐｏｒｔＳｙｔｅｍｓTXＦｅｄｂａｃｋＭｅｃｈａｎｉｓｍｉｎＤｅｃｉｓｉｏｎＳｕｐｐｏｒｔＳｙｓｔｅｍｓＳｕｎＺｈａｎｓｈａｎＩｎｓｔｉｔｕｔｅｏｆＳＥ．ＤａｌｉａｎＭａｒｉｔｉｍｅＵｎｉｖｅ...     

二阶椭圆型方程组广义解的 L_φ属性

设G是n维欧氏空间E~n 中的有界区域.设l相似文献   

POPOV METHOD FOR ROBUST ANALYSIS AND ROBUST SYNTHESIS OF MIMO LINEAR SYSTEMS WITH MRAMETRIC UNCERTAINTIES

ＰＯＰＯＶＭＥＴＨＯＤＦＯＲＲＯＢＵＳＴＡＮＡＬＹＳＩＳＡＮＤＲＯＢＵＳＴＳＹＮＴＨＥＳＩＳＯＦＭＩＭＯＬＩＮＥＡＲＳＹＳＴＥＭＳＷＩＴＨＭＲＡＭＥＴＲＩＣＵＮＣＥＲＴＡＩＮＴＩＥＳ￥ＨＵＡＮＧＹｉ（ＩｎｓｔｉｔｕｔｅｏｆＳｙｓｔｅｍｓＳｃｉｅｎｃｅ...     

Study on Variation of Parameters Formula and Stability for Impulsive Time－Delay Nonlinear Large Scale Systems

ＳｔｕｄｙｏｎＶａｒｉａｔｉｏｎｏｆＰａｒａｍｅｔｅｒｓＦｏｒｍｕｌａａｎｄＳｔａｂｉｌｉｔｙｆｏｒＩｍｐｕｌｓｉｖｅＴｉｍｅ－ＤｅｌａｙＮｏｎｌｉｎｅａｒＬａｒｇｅＳｃａｌｅＳｙｓｔｅｍｓＧＵＡＮＺｈｉｈｏｎｇ（Ｄｅｐｔ．ｏｆＢａｓｉｃＳｃｉｅｎｃ...     

APPROXIMATE SUBDIFFERENTIALS AND NONSMOOTH ANALYSIS FINITE DIMENSIONS

Ioffe's approximate subdifferentials are reviewed and some of his resultsare generalized.An extension of the calculus of the approximate subdifferentials forthe sums to any finite number of functions is provided along with a generalizationof the Dubovitzkii-Milyutin theorem.The presentation also indicates some of thelimitations of nonsmooth analysis and optimization.Restriction to the class offunction which is suitable for most of the purposes in nonsmooth optimization issuggested.     

QUALITATIVE ANALYSIS FOR A THIRD-ORDER DIFFERENTIAL EQUATION IN A MODEL OF CHEMICAL SYSTEMS

In this paper a mathematical model of chemical systems is investigated.We present the conditions for the existence and local stability of the steady statesand the periodic solution of the Hopf type.Specifically,we show by using an ana-lytical method that there may exist two or four Hopf bifurcation points separatedat a finite distance from each other;at the same time,a technique for studying theHopf bifurcation value is given.