最新刊期
卷 24 ， 期 1 ， 1985
- 摘要：A method based on gauge trasformation is given,which for obtaining othersolutions from some solutions of the non-linear equation (?)~2φ=Cφ~3 Finally,thesesolutions are discussed.
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发布时间：2023-12-08 - 摘要：The electret effect and the space charge effect in ferroelectric ceramics can beunified and explained using the Okazaki model.Experiments verify the existenceof polarization relaxation and piezoelectric relaxation which are predicted bythe theory.Quantitative theory of ferroelectric relaxation has been established.The theory coincide well with experiments.
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发布时间：2023-12-08 - 摘要：The N-I phase transition free energy of binary mixtures is obtained in meanfield approximation.The dependence of the supercooling temperatures on the molefractions is calculated.The results are found to be agreement with experimentresults.
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发布时间：2023-12-08 - 摘要：The changed cases of the stairs along height above sea level in Cryptocaryachinensis Community on Dinghushan,and the communities comparison to 10 fo-rest communities on Dinghushan and Nankunshan and Jigongkeng are analysedwith the measurement of species similarity and cluster analysis.The relation a-mong 10 forest communities and the leaning of the development of some communi-ties are exposed.The analysis methods are valued.It shows that percentage of similarity is thebest among three methods of the measurement of species similarity.Cluster ana-lysis is a better method which is widely used.
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发布时间：2023-12-08 - 摘要：Vigor index is a better criterion representing the quality of seeds for sowing ra-ther than the percent germination.Percent germination of seeds treated withaccelerated aging or germinated at supraoptimal or suboptimal temperature willshow the data near to the actual quality of seeds similar to the vigor index.Pre-chilling(3—5℃)the seeds before sowing will increase the vigor of seeds andimprove the performance.Soaking the seeds with ethrel(50—500 ppm)will has-ten the germination of seeds,and increase the vigor index.
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发布时间：2023-12-08 - 摘要：There are three sets of faults developed in Wugui Mountain area,the NE,theNNE and the NW.Effected by the plate collision during the Yanshan period andHimalayan period,natures of the faults have repeatly changed from compression—shear to tension—shear.All the faults have become normal faults during theneotectonic period.The fault-block uplifted area of Wugui Mountain bounded bythree sets of faults in different directions has uplifted intermittently during theneotectonic period,forming five erosion surfaces.The secondary fault-depressionwas formed in late Pleistocene or a little bit earlier.The secondary depressionwithin the Wugui Mountain fault-uplifted area is a thermo-anomalous belt.Re-search on how the three sets of faults cut off each other is of importance in loo-king for new thermal areas.
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发布时间：2023-12-08 - 摘要：The fault-tectonic belts of Guangzhou-Luofushan are the largest E-W trend fau-lt belts in the central part of Guangzhou area.It has a long developing history,and underwent polyepisode and polystage activites.The repeated tension andcompression(or compressional shear)of nearly N-S direction formed a series oftectonic rocks with different mechanical features and apparent zonation of thetectonic rocks which are superimposed and composed each other.The distributi-on of the Paleozoic strata,the Meosozoic and Cenozoic red beds,as well as theYenshanian igneous rocks and modern morphologic landscape are resulted fromthe repeated faultings which also influenced the subsidence of some portions ofpearl River Delta and the occurrence of earthquake of Guangzhou area.The int-ensity of faulting activity changed from strong to weak since Mesozoic to recenttime,and the intensity progressively decreased.
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发布时间：2023-12-08 - 摘要：We have studied the effect of “impurity” on crystallinity of poly(ethylene te-rephthalate),and the distribution of the third comonomer in the crystalline andnon-crystalline regions of copolycondensates.It shows that the third comonomeris absent in the crystalline region.
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发布时间：2023-12-08 - 摘要：A series of equations of ionic concentration calculated approximately for dou-ble standard addition method in ion-selective electrode analysis have been descr-ibed.They are so simple as to calculate by hand without slope of electrode andtheir errors are small.They have been proved by data from literature and ourexperiments.
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发布时间：2023-12-08 - 摘要：A remarkable absorbence at 440-442nm ascribed to the interaction of phenoxideor substituted phenoxide with 1,3,5-trintrobenzene show that the charge transfercomplexes have been formed.Through the Job plots and Scatchard plots by opti-cal measurements,it was indicated that when the concentration of donor wasmuch higher than that of acceptor,both of bimolecular complexes and termolec-ular complexes would be present.Four groups of comformation constants of thecharge transfer complexes and their molar absorptivities were measured by opt-ical method and calculated by microcomputer,and the logic of calculation wasgiven.
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发布时间：2023-12-08 - 摘要：The synthetic discrete method is applied to the static analysis in the planeproblems of elastic mechanics,and a method in selecting the basic functions ofnodel displacement model is presented.It is applicable to solving complex prob-lem in engineering by minicomputer.
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发布时间：2023-12-08 - 摘要：A class of ecological matrices P has been dealt with such that the real partsof all eigenvalues of matices QP are negative,where Q is an arbitrary positivediagonal matrix.
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发布时间：2023-12-08 - 摘要：This paper is to find,on the plane,the fundamental elements of which are or-iented circles,the common circles of a non-parabolic and two parabolic kernel-led fields of circlesδ（Z-Z0）=k≠0, （1.1）δ（Z-Z1）=0, （1.2）δ（Z-Z2）=0, （1.3）under the conditions that the two kernel circles Z1Z2are belonging to the field（1.1）,and the three circles Z0Z1Z2are not belonging to a same linear range ofcircles.The author gives the necessary and sufficient condition for the problemto be solvable;the problem is simplified by using Laguerre inversion,and thenthe solutions for every case are obtained.Finally an example for one case is of-feted.
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发布时间：2023-12-08 - 摘要：We discuss the projectional approximatlon-solvability for a class of nonlinearevolution equations in Banach spaces given by-（du）/（dt）=A（t）u+B（t）u,u（0）=u6where {A（t）;t（?）R+}and{B（t）;t（?）R?}are two families of densely defined nonlinearoperators.Operators A（t）are strongly accretive and operators B（t）are lower-semibounded.The error estimations are given in Hilbert spaces.
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发布时间：2023-12-08 - 摘要：The crystalline characterization on melting temperature and crystallinity rela-ting to the crystalline chain conformation of ultrahigh molecular weight poly-ethylene(UMWPE)has been studied by inverse gas chromatography.The as-poly-merized UMWPE powder has higher crystallinity(80—85%)and melting temper-ature(138-141℃),both of them increase with the molecular weight.When the as-polymerized UMWPE powder is melted and cooled spontaneously to ambient tem-perature the crystallinity of UMWPE decreases with the increase of molecularweight,and the melting tempeature lowers to about 130 degrees cent.
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发布时间：2023-12-08
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