最新刊期
卷 13 ， 期 2 ， 1991
- 摘要：In this paper,the interaction between foundation withcavern and frame structure is studied by the coupling methods of BEMand FEM.On the interface between the foundation and structure,thecoupling analysis needs to satisfy both the condition of displacementcompatibility and force equilibrum.A calculating program for two-dim-ensional problem is worked out in the computer,SIEMENS 7570C.Twoengineering examples are calculated and the results are compared withthose obtained by the comventional simplified method and with the observedresults from the engieering structures.It indicates that it is necessaryfor the weak rock foundation with shallow cavern,in the buried depth,to take the interaction into account.533|646|0更新时间：2023-11-28
- 摘要：In this paper,a new method of using vector-matrix tosolving a dimensional chain in plane is presented.A mathematical modelis established by means of Rodrig's formula,and the computer programof this method is provided.It is more general and convenient than thegeometric calculation.The numerical calculation is presented in connec-tion with a practical example.The result is the same as that of geometricmethod.761|7|0更新时间：2023-11-28
- 摘要：The orientation of Chinese characters is very importantin the interface programming design of Auto CAD DXF documents.Beca-use some parameters are automatically computed by the Auto CADsystem,it is very difficult for Chinese characters to be oriented in DXFinterface programmings.This paper reports the calculating method of ori-ented parameters and the orientation method of Chinese characters in theinterface programming of DXF documents,and gives a general Fortran 77subroutine for the orientation of Chinese characters.The method solves thedifficulty of the orientation of Chinese characters in the interface program-mings of DXF documents,and makes it convenient for various CAD pic-tures to be oriented in Chinese Characters.3058|91|0更新时间：2023-11-28
- 摘要：This paper studies the determination methods offuraldehyde and compares them with each other in a furaldehyde-benzenesample system that contains less than 10% of furaldehyde.The recentChinese national standard method is that of hydroxylamine(GB 1926-80).This method has an error approximately greater than 5%,and it has moresteps and is time-consuming.The Nicolet DX quantitative analysis packagecauses even greater error,while FTIR method has errors less than 5%by selecting proper baselines and drawing a work curve.FTIR methodis simple,quick and nondestructive,and needs only few amounts ofsamples.It's suitable to the samples of the system of the experiment.857|8|0更新时间：2023-11-28
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- 摘要：Autolisp is an advanced intellectural programing langu-age.Its capability only depends on the user's imagination.Althoughthree dimensional architectural modeling is very important in CAD,thecommon situation of limited computer amount and computer powerprevents its use in many places of this country.To prove the possibilityof overcoming those limitation by making full use of the potential powerof Autolisp and combining the advantages of both computers and archi-tects,a powerful AutoCAD new command developed with Autolisp isintroduced.620|8|0更新时间：2023-11-28
- 摘要：The limit of convergent continuous function sequencemay be discontinuous.This makes difficults both in theory and applica-tion.For example,it makes the condition for operation of limits of integralof the function sequence become very strong.In general,it requiresuniform convergence to the function sequence.Therefore it is very imp-ortant to study such convergence as the limit of continuous function sequence,the limit is continuous.This paper studies a known substrong converg-ence of a function sequence in topological space and proves the necessaryand sufficient conditionof this convergence.561|7|0更新时间：2023-11-28
- 摘要：This paper analyzes the structure chacracter of sixteenorder twofold magic square mathematic model to find out the compilingmethod of 2~m order magic square.And the matrix expressing of 32nd and64th order model are also presented.728|8|0更新时间：2023-11-28
- 摘要：In this paper,the method of computing deformation ofuniform cross-section complex load bearing beam by using odd functionis introduced.By bringing forward a concept equivalent load,this methodcan be used to compute the deformation of variable cross-section complexload-bearing beams.It is of some practical value in calculation ofengineering structure.647|8|0更新时间：2023-11-28
- 摘要：This paper discusses the mechanism of the reduction ofheat flux through a roof pond with floating plants.A thermal model ispresented and the analytical results are obtained.The results are ingood agreement with the experimental observation.654|11|0更新时间：2023-11-28
- 摘要：This paper suggests a new method for determing theinitial condittons of networks with degenerate cut-sets,which is strictlybased on the physical relationship between currents and magnetic fieldcorresponding witth them.This method first sets up a reasonable magne-tic network for solution,and then finds out the transfer linkages byexciting sources in this network,so that the initial conditions can befinally determined.Consequently,this method is simple,normalizable,having clear and correct physical concept,and advantageous to solvingcomplex networks.532|7|0更新时间：2023-11-28
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- 摘要：This paper presents an all round review of recent deve-lopments in treating the singularities in boundary element methods bothfor numerical computing and for mathematical analysing.Approachesfor numerical treatment of singular and hyper-singular integrations arelisted.Singular behaviour of solution on non-smooth boundary are discus-sed and the mathematical tools for describing it,such as the Sobolevspaces defined on a part of boundary,the pseudo-differential operatorsare presented.In order to incorporate the singular behaviour into theboundary element approximation,the technique of introducing singularboundary element is suggested.930|715|0更新时间：2023-11-28
- 摘要：Among so many technologies of the natural gas desul-phation at home and abroad this peper presents a new desulphationtechnology with phenanthraquinone being studied and run well in itstest production.The technological features ars described with a greatmass of data of experiments and test production.The desulphationmechanism and technological process are clarified.The chemistry sta-bleness of desulphation is tested and analysed in accord with the mainprocess of desulphation chemistry reaction.The paper also presents themethod to raise the stableness of desulphurizer,efficiency of desulphationand rate of recovered sulphate.538|585|0更新时间：2023-11-28
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