On the distribution of zeros of a sequence of entire functions approaching the Riemann zeta function

In this paper we study the distribution of zeros of each entire function of the sequence , which approaches the Riemann zeta function for Rez<−1, and is closely related to the solutions of the functional equations f(z)+f(2z)+?+f(nz)=0. We determine the density of the zeros of Gn(z) on the critical strip where they are situated by using almost-periodic functions techniques. Furthermore, by using a theorem of Kronecker, we also establish a formula for the number of zeros of Gn(z) inside certain rectangles in the critical strip.     

On entire solutions of degenerate elliptic differential inequalities with nonlinear gradient terms

In this paper we give sufficient conditions for the nonexistence of nonnegative nontrivial entire weak solutions of p-Laplacian elliptic inequalities, with possibly singular weights and gradient terms, of the form , under the main request that h and are continuous on R⁺. We achieve our conclusions introducing a generalized version of the well-known Keller-Osserman condition.     

具临界指数的Baouendi-Grushin方程显式整解及Sobolev嵌入常数

给出了具临界指数的Baouendi-Grushin方程Pu=-uQQ+-22的显式解为u=c[(2|z|2)2+4|t|2]-Q4-2,其中P=Δz+|z|2Δt为α=1时的广义Baouendi-Grushin算子,z∈Rn,t∈Rm,Q=n+2m为齐次维数,c=[(Q-2)n2]Q4-2,>0.本文还由此导出算子P的精确Sobolev不等式中的嵌入常数为S=2Qmπ-2(nn++2mm){n[n+2(m-1)]}21×Γ(n+m)Γ(n+2m)1n+2m,极值函数为[(1+|z|2)2+4|t|2]-41.当n=m=1时,本文的结论与Beckner[4]的结果一致.     

地质雷达在顶管施工隐患检测中的应用

顶管施工过程中会导致顶部围岩振动,产生引起地面塌陷的隐患.利用地质雷达研究引起地面塌陷隐患的位置及规模,可以有效地制定治理方案.该文介绍了地质雷达检测方法的原理及其在顶管检测方面具有分辨率高、探测结果准确、无损检测等优点.重点探讨了地质雷达应用于顶管检测数据采集处理以及图像识别,并对围岩扰动程度按三种标准划分,为顶管施工产生的隐患治理提供了科学依据.且该方法在实际工程中效果好.     

On best localized bandlimited functions

Let, for σ > 0, be the set of complex functions f ∈ L ¹ (ℝ) with the Fourier transforms vanishing outside the interval [−σ; σ]. In this paper, we study the problem of the best approximation of the Dirac function δ (which has the Fourier transform with widest support supp ) by functions . More precisely, we consider the quantity inf and its extremal functions . __________ Translated from Lietuvos Matematikos Rinkinys, Vol. 46, No. 4, pp. 548–564, October–December, 2006.     

On some criteria for completely regular growth of entire functions of exponential type

This paper sharpens the author’s previous results concerning the completely regular growth of an entire function of exponential type all of whose zeros are simple, forming a sequence Λ = {λ_k} _k=1 ^∞ . For a function with real zeros, we write the growth regularity conditions (on the real axis and on the entire plane) in terms of lower bounds only for the absolute value of the derivative at the points λ_k. We also obtain an analog of Krein’s theorem concerning the functions whose inverse can be expanded in the corresponding series of simple fractions.     

复微分方程组及复微分-差分方程解的级

利用Zalcman关于正规族的方法,研究了两类复高阶微分方程组的亚纯解的增长级问题;同时,利用Nevanlinna值分布理论,讨论了两类复微分-差分方程的超越整函数解的增长级.所得结论推广和改进了一些文献的结果,并举例说明本文的结论精确.     

流式细胞仪在动物疫病检测中的应用

介绍了流式细胞仪（Flow Cytometry,FCM）的主要构造和工作原理。结合本职工作介绍了流式细胞仪在动物疫病检测、免疫学中的应用;以鸡外周血CD4＋、CD8＋、CD4/CD8分析结果和鸡外周血淋巴细胞亚群分析结果为例,介绍了该仪器在动物疫病检测研究中的作用;在信号的显示和分析方面着重介绍了双参数数据显示和分析中的荧光测定值。     

“用工荒”凸显新生代农民工体面劳动的新诉求

"用工荒"在近年日益凸显,成因复杂,但与往年不同的是,随着新生代农民工群体的日益扩大,因诉求增多而导致的"用工荒"日渐明显。除了薪酬待遇问题外,他们想和城市工人一样,成为有保障、有尊严劳动者的诉求也越来越强烈,他们渴望实现体面的劳动。为缓解"用工荒"政府、企业应当一起努力,尊重农民工的权益诉求,为新生代农民工构建一个良好的就业环境,促进其实现体面劳动。     

工作过程导向的食品理化检验实验教学改革与实践

通过对食品理化检验实验课教学内容的优化、教学方式的改进及考核方式的完善,构建工作过程导向的食品理化检验实验教学体系,即在教学过程中以检测项目为载体,模拟实际工作情境,使学生在独立完成整个检测任务的同时,提高实验技能,培养学生综合职业能力,同时探讨工作过程导向的课程教学实施及评价体系.