关于全平面上收敛的B-值Dirichlet级数的(p,q)(R)型和下(p,q)(R)型

通过把B-值Dirichlet级数在全平面上的(p,q)(R)型和下(p,q)(R)型转化为Dirichlet级数在全平面上的(p,q)(R)型和下(p,q)(R)型,结合相应的Dirichlet级数的结果,得出了关于B-值Dirichlet级数在全平面上的(p,q)(R)型和下(p,q)(R)型的相应结果.     

2,3-二氯-6-羧酰氯喹啰啉活性染料反应活性及“染料-纤维”键的稳定性

对２,３－二氯－６－羧酰氯喹啉类活性染料的反应活泼性以及“染料－纤维”键的稳定性进行了反应动力学研究,测定水解速度常数;与其他类型活性染料进行比较,对此类活性染料性能进行了评价。     

迭代级亚纯函数导数的Borel方向

利用亚纯函数的迭代级的概念,研究了迭代级亚纯函数导函数的Borel方向.     

迭代级函数的辐角分布

以值分布理论为工具,研究了整函数f的辐角分布,在假设f满足条件i(f)=p(00时,证明了f必存在从原点出发的一条半直线B:argz=θ0(0≤θ0<2π),使得对任意ε>0有limr→∞log[p]{n(r,θ0,ε,f=α) n(r,θ0,ε,f(k)=β)}/logr=σ,其中α,β为任意有穷复数,且β不为零,k为任意正整数,并将结果推广到f是亚纯函数的情形.     

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.     

极值问题和求积问题举例——初等数学与高等数学在处理方法上的联系

打倒“四人帮”以后,教育阵地这块重灾区获得了新生。广大师生的精神面貌焕然一新。我们通过揭批“四人帮”,澄清了思想,提高了认识,下狠心一定要把“四人帮”所造成的损失夺回来。二年来的(教材教法)课程的刻苦学习以及毕业前的教育革命的亲身实践,对于如何用辩证唯物主义观点去观察、分析数学中的矛盾之间的关系;找规律、抓本质,掌握了一定的思想方法。我们深深认识到:高等数学与初等数学是一个有机的整体,不学好高等数学,教学初等数学就站不高,看不远,把握不住中学数学内容本质的东西,对初     

Rapid solidification of acoustically levitated Al-Cu-Si eutectic alloy under laser irradiation

Al-27%Cu-5.3%Si ternary eutectic alloy was melted using a YAG laser and then solidified while being acoustically levitated. A maximum undercooling to 195 K (0.24 TL) was achieved with a cooling rate of 76 K/s. The solidification microstructure was composed of (Al+θ+Si) ternary eutectics and (Al+θ) pseudobinary eutectics. During acoustic levitation, the (Al+θ+Si) ternary eutectics are refined and the (Al+θ) pseudobinary eutectics have morphological diversity. On the surface of the alloys, surface oscillations and acoustic streaming promote the nucleation of the three eutectic phases and expedite the cooling process. This results in the refinement of the ternary eutectic microstructure. During experiments, the reflector decreases with increasing alloy temperature, and the levitation distance always exceeds the resonant distance. Because of the acoustic radiation pressure, the melted alloy was flattened, and deformation increases with increasing sound pressure. The maximum aspect ratio achieved was 6.64, corresponding to a sound pressure of 1.8×104 Pa.     

某类亚纯函数的例外集

讨论了Nevanlinna第二基本定理余项中的例外集问题,得到了例外集与亚纯函数的增长级之间的关系,较传统结果更加具体细化.     

DNA damage stress induces the dissociation of Smurf1/2 from MDM2 in a slow manner

The tumor suppressor p53 locates at the key point of cell growth or apoptosis balance, and the expression level of p53 is tightly controlled by ubiquitin ligases including MDM2. Upon DNA damage stresses, p53 was accumulated and activated, leading to cell cycle arrest or apoptosis. We previously showed that Smad ubiquitylation regulatory factor 1/2 (Smurf1/2) promotes p53 degradation by interacting with and stabilizing MDM2, and consequently enhancing MDM2-mediated ubiquitylation of p53. However, it is uncle...     

一类高阶线性微分方程解的正规性问题

研究了高阶线性微分方程f(n) +an -1f(n -1) +… +a1f′ +a0 f=0的解的正规性问题 ,其中系数ai(0≤i≤n - 1)为整函数或只有有限个极点的亚纯函数 .