输液管的非线性振动、分叉与混沌——现状与展望

围绕输液管的非线性振动、分叉与混沌问题，对近几年来的主要研究工作加以综述并提出预测，其中包括运动方程中非线性项的归纳与讨论、非线性动力分析的一些现代计算方法、定常流速下输液管的分叉与混沌行为、振荡流速下输液管的参数共振以及今后值得进一步研究的某些问题．     

丙酸睾丸素的吸附阴极溶出伏安法研究

在ｐＨ为６．０的Ｂ－Ｒ缓冲溶液中，丙酸睾丸素于电位－１．４Ｖ（ｖｓ．ＳＣＥ）左右处出现一个灵敏的附阴溶出峰。经５ｍｉｎ富集后，阴极溶出峰电流与浓度在１．３８×１０＾－＾８－７．３×１０＾－＾８ｍｏｌ／Ｌ范围内成线笥关系，该方法用于注射液中丙酸睾丸素含量测定，回收率８０％－８６％。检测下限为４．１×１０＾－＾９ｍｏｌ／Ｌ。     

Distributions and correlations of constituent quarks in jets

In the frame of the quark recombination model, we study the momentum distributions and correlations of constituent quarks in jets by analyzing the final state hadrons generated by PYTHIA for the hard parton fragmentation processes in vacuum. Parameterizations for the distributions are tabulated.     

试论岩石力学的最新进展

本文综述了目前岩石力学测试技术、理论探讨与工程应用情况,并对今后的发展提出一些意见和建议。      

利率为马氏链的离散时间风险模型的破产概率(英文)

本文考虑了带随机利率的离散时间风险模型.在假设利率为马氏链条件下,得到了有限时间和最终破产概率所满足的递推积分方程,以及最终破产概率的Lundberg不等式.     

Numerical simulations and experimental investigations on transverse effects of two-wave mixing in a photovoltaic photorefractive crystal

The transverse effects of two Gauss waves mixing in a photovoltaic photorefractive crystal,i.e.,the dynamical evolutions of signal beam with different parameters,are traced numerically and experimentally.Both the one-dimensional numerical simulations and two-dimensional experimental investigations show that the self-focusing effect of signal beam becomes more obvious as the intensity of pump beam and the angle between the signal and pump beams increase.In accordance with these results,the state of two Gauss...     

THE C-K MODEL WITH SOLVABLE ENDOGENOUS FERTILITY

§ 1　 IntroductionThe relationship of population and economic growth is one of the most importantproblems in modern economic growth theory.Establishing a mathematical model theoreti-cal to study the interrelation of population and economic growth becomes a fundamentalmethod in this field[1～ 7] .In the papers[8,9] ,we obtain the especial C-K models with solv-able endogenous fertility under the specified strongly additive utility function and Cobb-Douglas production function.In the models,th…     

Weighted integral inequalities in Orlicz martingale classes

Under appropriate conditions on Young's functions Φ1 and Φ2,we give necessary and sufficient conditions in order that weighted integral inequalities hold for Doob's maximal operator M on martingale Orlicz setting.When Φ1 = tp and Φ2 = tq,the inequalities revert to the ones of strong or weak(p,q)-type on martingale space.     

THE OPIAL INEQUALITY IN R~N

Where n is a bounded smooth dornain in RN, A.u = Z k(IVuIp--'e) is the p1aPlacei = 1operator, p 2 2, q E be, ff) are some given real number. By this result, we deduce the famousOpial inequality in RN.As we know, the solvabiliy of problem (1) resuIts from whether the minimumcan be achieved. If (2) is achieved, the attained function W(x) is the nontrivial solution ofproblem (1) corre8ponding to A = A1(p, q, n) and ^ = ^1(p, ql n) is the corresponding ndnimumeigenvalue. Since q i8 8maller …     

THE DYNAMICS OF FERTILITY IN C-K MODEL WITH ENDOGENOUS FERTILITY

lhtroduCtlonThe relatloDshlp bet W6W6en the economic gr OWOWth and population growth Is the one of mostimportant problems In the economic growth theorem．In the empirical analyses,the level offertility and the level ofincomeper caplta Is one of*the strongest observably negative correl砒ions,In cross－country dataIS]．Constructing a mathematical model to confirm the empirical indingsIs a m叼or method In thetheoretical study、BeckerI6];GalorI7]and TaTamuraW use OLG modelto discuss this…