Description of 114 Cd in the E（5） Symmetry

By analysing the known low-lying levels and the E2 transition rates, it is shown that the empirical scheme of 114Cd is in good overall agreement with the predictions of the transitional dynamical symmetry E(5) proposed by Iachello [Phys. Rev. Lett. 85 (2000) 3580]. This suggests that 114Cd may be better described by an E(5) nucleus than a U(5) nucleus as known before.     

用介电时域方法分析聚合物的慢响应

在－３０℃至１４０℃温度范围内用时域方法研究聚合物ＰＥＴ、ＰＳ材料的慢极化响应，获得了一些关于聚合物的有用信息，实验表明，微分时域谱方法简单明了，意义清晰，是很有前途的介电时域研究手段。     

几种氮氧自由基与环糊精作用的EPR研究

测定了３种氮氧自由基与环糊精相互作用的ＥＰＲ波谱，计算了波谱参数，结果表明：与环糊精作用后，自由基的超精细分裂常数ａＮ值及旋转相关时间τｃ都有规律变化，由此探讨了氮氧自由基与环糊精作用位点及作用力大小。     

生产α-萘乙酸的经验介绍

常用的合成植物刺激素有:β-吲哚乙酸(β-Indolacetic acid,Heteroauxin),可由人尿中分离。利用Fischer的吲哚环的合成法也可以制得,它是属于苯联胺与β-丁酸醛的缩合反应。2,4二氯苯酸乙酸(Z. A.Dichlorophenoxy acetic acid),最初知道它具有对植物生长刺激的作用;而在浓度较高时,它的除草作用(水田),效果更佳,所以现多用做除草剂,它是出2,4二氯酚淦与一氧乙酸作用而制得。合成植物刺激素现以α-萘乙酸应用较为广泛。其土法制备是利用氧化铁为催化剂在溴化钾存在下,一氯乙酸与萘作用而得。此外,比较有利还有Coles,     

NONSTATIONARY PANDOM VIBRATION ANALYSIS OF LINEAR ELASTIC STRUCTURES WITH FINITE ELEMENT METHOD

At present,the finite element method is an efficient method for an-alyzing structural dynamic problems.When the physical quantitiessuch as displacements and stresses are resolved in the spectra andthe dynamic matrices are obtained in spectral resolving form,the re-lative equations cannot be solved by the vibration mode resolvingmethod as usual.For solving such problems,a general method is putforward in this paper.The excitations considered with respect tononstationary processes are as follows:P(t) ={P_i(t)}, P_i(t)=a_i(t)P_i~o(t),a_i(t) is a time function already known.We make Fourier transforma-tion for the discretized equations obtained by finite element method,and by utilizing the behaviour of orthcgonal increment of spectralquantities in random process,some formulas of relations about thespectra of excitation and response are derived.The cross power spec-tral denisty matrices of responses can be found by these formulas,then the structrual safety analysis can be made.When a_(i)(t)=1(i=1,2,…,n),the.m     

The Isometry and Almost Isometry in B(m(N)→m(Ω))

In(1),(2),we have introduced the approximation problem of almost isometry